JP6403868B2 - A method for performing open loop control and / or closed loop control of engine output, an output control apparatus for performing the method, and a computer program including program code for performing the method - Google Patents

Description

  The invention relates to a method for open-loop control and / or closed-loop control of engine power, with the features described in the superordinate concept of the independent claims of the method invention. The invention further relates to an engine output control device in which such a method is implemented and to a computer program product comprising program code for implementing such a method when implemented in a data processing unit.

BACKGROUND ART In the case of a conventional passive accelerator pedal for open-loop control or closed-loop control of the output of an engine such as an automobile, a driver operates against a spring incorporated in the pedal mechanism. In this case, the spring force is approximately proportional to the stroke followed by the pedal. This proportional force allows the driver to accurately adjust the pedal position and thus accurately distribute output demands, such as rotational torque demands, on the engine.

  The electronic accelerator pedal is no longer directly or mechanically connected to an engine member, such as a throttle valve, that converts the power demand to the engine into the required power. Instead, the accelerator pedal is provided with at least one sensor, and the accelerator pedal is only electronically connected to a member that converts an output request for the engine into the required output. In order to identify the power demand for the engine from the pedal position and communicate that demand to the engine, some method is typically implemented in the control unit.

  According to this type of method, a pedal position or an operating position of the pedal between the initial position and the final position is detected by the sensor. Further, in the next step, an output request for the engine is obtained by applying a dependency relationship between the operation position and the output request for the engine. In this case, in general, the above-described dependency is designed such that the output demand for the engine is maximized when the accelerator pedal is moved to the final position. Thereafter, a control parameter of a control member such as a throttle valve can be obtained from the obtained output request and transmitted to the control member. The full load point of the engine can be set for the final position of the accelerator pedal.

  An output control device that implements such a method is described in DE 1020100062363 (DE10 2010 062 363 A1).

German Patent Application Publication No. 102010062363

SUMMARY OF THE INVENTION The premise of the present invention is that in the case of an electronic accelerator pedal, if a mechanical failure occurs in the accelerator pedal, the operation of the engine may be severely limited, or even not at all. It may be possible. For example, if the accelerator pedal stroke is limited or the accelerator pedal angle is limited and the accelerator pedal can no longer be displaced to the final position, the full load point of the engine can no longer be reached even if the conventional dependency is applied. . As the limit of the accelerator pedal stroke or accelerator pedal angle increases, the power requirement range achievable in this dependency becomes smaller. In the worst case, it may happen that the engine can no longer require enough power to move the vehicle to a factory, for example.

  Using an active accelerator pedal additionally expands the availability of the electronic accelerator pedal. That is, for example, it is possible to provide a possibility that tactile feedback is transmitted to the driver via the accelerator pedal in accordance with the driving situation. Such tactile feedback is transmitted, for example, by applying vibration to the accelerator pedal or the pedal plate of the accelerator pedal, or by applying a specified force to the accelerator pedal. In order to move the accelerator pedal from the position corresponding to, for example, the traveling state to the direction of the final position, it is required to spend increased force as prescribed.

  The active accelerator pedal described above can use an actuator member, such as a motor, to apply the necessary force to the accelerator pedal. If this type of motor or actuator member is blocked, the driver may no longer be able to move the accelerator pedal to the final position, even with normal or reasonable power. For this reason, the full load point is no longer reachable under normal dependencies, and the limitation of the accelerator pedal stroke resulting from the actuator member being blocked is sufficient to move the vehicle to a factory, for example. There is a risk of a situation where no output is supplied.

  Therefore, it is considered that there is a request to provide the following engine output control method. That is, the method allows the full load point of the engine to nevertheless be reached when a defined event occurs, for example when the maximum achievable accelerator pedal stroke of the electronic accelerator pedal is limited, or At least, sufficient output can be taken from the engine, for example, to move a vehicle driven by the engine to the factory.

Advantages of the invention Such a need can be met by the features of the invention as set forth in the independent claims.

  The dependent claims contain advantageous embodiments of the invention.

  In the following, the features, details and possible advantages of the method for open-loop control and / or closed-loop control of the engine output, the engine output control device, and the computer program product will be described in detail according to embodiments of the present invention.

  According to a first aspect of the invention, a method for open-loop control and / or closed-loop control of the output of an engine, in particular an automobile engine, is proposed. According to this method, control of the full load point of the engine or at least one load point of the engine is realized, and this method limits the pedal stroke of the accelerator pedal that sets a desired output demand for the engine. Emergency operation is possible even in situations where the final position of the pedal can no longer be reached.

  For example, the “pedal stroke” may be a stroke along a section in which a stroke length can be detected in units of mm or cm. However, it can also be referred to as “stroke” in the sense of a rotation angle about the pedal axis, and in this case, the position can be detected by angle.

  This is achieved by the method according to the invention comprising the following steps: A step of detecting an operating position of an accelerator pedal movable between an initial position and a final position; and a step of obtaining an output request for the engine by applying a first dependency between the operating position and the output request; It is achieved by including. In this case, according to the present invention, after the occurrence of a prescribed event, an output request for the engine is obtained by applying another dependency relationship between the operating position and the output request. Here, the prescribed event is a situation in which the accelerator pedal can be moved only to the first position located between the initial position and the final position even if normal power is consumed.

  That is, for example, in such a situation, the first position may be located at a position that is 40% at the maximum of the position difference between the final position of the accelerator pedal and the initial position, starting from the initial position. it can. Therefore, in such a case, at least 60% of the normally assumed pedal stroke can no longer be used.

  Here, the expression “expend normal power” can be considered as follows. That is, for example, in order to overcome the action of the force of the spring connected to the accelerator pedal, or in the case of an active accelerator pedal, to overcome this spring force and the auxiliary force applied to the accelerator pedal from the actuator member To spend the force generally required to displace the accelerator pedal from the position toward the final position or the initial position is to spend a force that is substantially unchanged. Thus, the auxiliary force applied by the actuator member can be procured at, for example, a “kick down” point. For example, even if the force expended to displace the accelerator pedal is at most 5% or at most 10% away from the target value, (currently) “normal force is still consumed. It can be said. Therefore, when the deviation from the target value is further increased, it is indicated that the accelerator pedal can no longer be moved from the reached position even if “normal power is consumed”. It is also possible to detect a situation where the accelerator pedal cannot be moved from the first position even if normal force is consumed, for example, without using a force sensor. This is the case, for example, when the control unit identifies that the actuator member connected to the accelerator pedal is blocked and the reachable accelerator pedal stroke range is limited. Based on such a block state, the reachable accelerator pedal position is limited, and the control device identifies that the accelerator pedal can only be moved to the first position, for example, even if normal force is consumed. can do.

  Unlike the prior art, the advantage gained by the present invention is that the change in the dependency between the operating position and the output demand is remarkably changed after a situation occurs in which the accelerator pedal can barely reach the first position. By being able to be carried out simply and remarkably quickly, for example, the entire power range of the engine or at least the power range of the engine required for safe emergency operation is provided to the driver by the method according to the invention. It can be done. Thus, the driver advantageously uses open-loop control or closed-loop control over a wide range of engine loads, even though only a narrow pedal travel range is available that limits the accelerator pedal reaching the final position. Can be controlled.

  According to one embodiment of the method according to the invention, the first dependency assigns a progressively increasing power demand to the engine to a progressively increasing value of the accelerator pedal operating position, and the final position of the accelerator pedal is: The maximum output request is assigned. Furthermore, in this case, in another dependency relationship, an output request in the range of 90% to 100% of the maximum output request is assigned to the first position. Here, the maximum output request can be made to correspond to, for example, all load points of the engine. In this way, the following is advantageously achieved: That is, even if the accelerator pedal can only be moved to the first position, the driver can take out the entire output range of the engine or almost the entire output range of the engine. In this way, the use of a vehicle with an engine, for example, is advantageously limited very little or not, so that it is advantageous to stop the operation of the vehicle due to the situation where the accelerator pedal is blocked. It can be avoided. For example, by doing in this way, even when the accelerator pedal cannot be moved from the first position, it is possible to achieve high-speed running or a good acceleration value even in a fully loaded vehicle.

  In another dependency, advantageously, the gradually increasing value of the operating position is assigned to the gradually increasing value of the operating position from the initial position to the first position, whereby the driver advantageously The accelerator pedal can continue to be used as normal, and in the limited pedal stroke range, the engine power range provided by another dependency can be fully utilized.

  According to one embodiment of the invention, another dependency is generated from the first dependency by compression along an axis having a value of the operating position, in particular by linear compression. This advantageously realizes that the driver finds according to the accelerator pedal position a driving characteristic that closely approximates the normal situation for the output demand he desires. In this way, the driver only needs to get used to the limited accelerator pedal stroke, so that safety can be advantageously improved in such a situation.

  In the first dependency, the same value of the output request assigned to the value of the pedal stroke that belongs to the pedal stroke range from the initial position to the final position is changed to the initial position in another dependency. It can be understood that this is assigned to the value of the pedal stroke belonging to the pedal stroke range from the first position to the first position. If the above dependency is written in a graph in which the pedal position is written on one axis (for example, the x-axis) and the output request is written on the other axis (for example, the y-axis) orthogonal thereto, this means that the pedal This corresponds to compression along an axis having a value of the position or the operating position of the pedal. Such compression can be realized, for example, by multiplying the value of the operation position belonging to the first dependency relationship by the proportional coefficient. An appropriate proportionality factor (a) is, for example, a first stroke distance (SB) from the initial position (A) to the first position (B) and a second distance from the initial position (A) to the final position (E). Is obtained by the quotient of the stroke distance (SE), that is, a = SB / SE. In this case, the proportionality coefficient a may be a constant, or may depend on the pedal position, for example.

  Therefore, another dependency can be obtained from the first dependency in such compression as follows. That is, for the initial position, the same output request value is set for another dependency relationship and the first dependency relationship. For the first position in another dependency relationship, the first dependency relationship is the same as the final position. The value of the output request is the same as that of the one, for example, the maximum output request, that is, the full load point.

  According to one embodiment of the invention, another dependency is generated from the first dependency by compression along the axis having the value of the output demand, in particular by linear compression. In this way, for example, when the accelerator pedal stroke is severely limited and the first position is no longer at, for example, 10% or 20% of the total stroke from the initial position to the final position. The method is advantageously prevented from providing the driver with a full engine load point. The reason for this is that if the accelerator pedal stroke is limited in this way, the accelerator pedal's initial position will place little or no power demand on the engine and the engine will be driven at full load. This is because the range between the first position of the pedal is too narrow for effective control of the engine output. Rather, this situation creates the risk that the engine and other vehicle components will be damaged by excessively rapid load changes. At the same time, there is a risk that the safety of the driver, passengers and other traffic participants is jeopardized because the vehicle is no longer open or closed loop controlled for its engine power. Thus, another dependency can advantageously be generated by compression along the axis having the value of the output demand: That is, according to this other dependency, the effective part of the engine output range is controlled by the accelerator pedal stroke range that is still available, and in this way for example a kind of emergency operation safely with reliability. As a mode, you can go to the factory. In this case, the achievable part of the engine output range is significantly greater in another dependency than the achievable output range obtained on the basis of the first dependency in the still usable accelerator pedal stroke range. can do.

  The expression “compression” can be understood as follows. That is, for the same value of the pedal position to which the output request value is assigned in the first dependency relationship or the operating position of the accelerator pedal, in another dependency relationship, it is reduced or proportionally reduced. It can be understood that the value of the output request is assigned. If such a dependency is written in a graph in which the pedal position is written on one axis (for example, the x-axis) and the output request is written on the other axis (for example, the y-axis) orthogonal thereto, this means that This corresponds to performing compression along an axis (for example, the y-axis) having the value of the output request. Such compression can be realized, for example, by multiplying the value of the output request belonging to the first dependency relationship by the proportional coefficient b. In this case, the proportional coefficient b can be set to 1 or less, for example. This proportionality factor may be a constant (linear compression), or here again depending on the operating position of the accelerator pedal.

  According to one embodiment of the present invention, at least one transient dependency between the output request and the operating position is applied in a transition period from when a specified event occurs to when another dependency is applied. The This advantageously prevents the driver from suddenly encountering a dependency that has changed rapidly after the detection of a defined event. Therefore, for example, in the case where the accelerator pedal is in the first position when a specified event is detected, it is possible to avoid a sudden increase in the output of the engine due to the corresponding acceleration of the vehicle. it can. Such a situation may occur in the following cases. That is, for example, a medium power demand for the first position of the accelerator pedal is different from the first dependency imposed on the engine or required for the engine. This is a case where the dependency is rapidly switched. According to an embodiment of the invention proposed here, the power demands on the engine in at least one transition period, for example from several seconds to several tens of seconds, for example at least 5 seconds, preferably at least 10 seconds, particularly preferably at least 30 seconds. At least one transient dependency is applied to determine At least one transient dependency preferably provides a soft transition from one dependency to another with respect to the value of the output demand determined by the method according to the invention according to the accelerator pedal position or the operating position It is configured to be able to.

  For each value of the operating position, based on two dependencies or transient dependencies applied one after the other, the relative difference of each output requirement required for those operating positions is 5% at maximum In particular, if the maximum is 1%, it is advantageous that the engine characteristics do not change suddenly when the accelerator pedal is operated until the other dependency described above is applied. Therefore, the relationship with the output requirement required changes substantially continuously and constantly.

  According to one embodiment of the present invention, the accelerator pedal is configured as an active accelerator pedal provided with an actuator member that acts on the accelerator pedal. This advantageously allows the actuator member to be easily blocked when a failure has occurred that limits the achievable range of the accelerator pedal stroke, in which case the driver, for example, at least The vehicle in which such a failure occurs can be driven to the nearest factory.

  According to one embodiment of the present invention, the dependency relationship between the output request and the operation position can be stored in the storage device as a pedal characteristic curve, and in this case, the value of the output request in the pedal characteristic curve is Assigned to the pedal position value. At the same time or as another option, the dependency relationship can be stored in the storage device as a characteristic map. In this case, the output request value is assigned to the pedal position value in the characteristic map. At the same time or as another option, the dependency relationship may be stored in the storage device as one or more function relationships, in which case one value of the pedal position is determined from the one or more function relationships. Can be calculated or determined or calculated. This advantageously allows, for example, the control device or the control unit to access the dependencies in a simple and fast manner.

  A warning lamp or a warning signal can be provided so that the transition from the first dependency relationship to another dependency relationship becomes clear to the side operating the accelerator pedal. Further, the following may be considered. That is, the transition from the first dependency relationship to another dependency relationship can be performed according to the active operation on the side of the accelerator pedal, for example, this can be performed by a button, a switch panel, or generally Can be performed according to a tactile or acoustic or optical input member. One possible way to increase safety is to assume that the application of another dependency assumes that the accelerator pedal has returned to its initial position at least once after the prescribed event has occurred. In addition, the fact that the accelerator pedal is held in its initial position for a specified holding period means that after a specified event occurs, another dependency is applied to determine the output demand for the engine by the method according to the present invention. Can be assumed. In this case, the prescribed holding period is, for example, at least 3 seconds, preferably at least 5 seconds, more particularly preferably at least 10 seconds.

  According to a second aspect of the present invention, an output control device for an engine, particularly an automobile engine, is proposed, and the method according to the above-described embodiment is performed or executed in this output control device. According to this output control device, for example, control of the full load point of the engine or at least one load point of the engine is realized, and this device limits the pedal stroke of the accelerator pedal for setting a desired output request for the engine. Thus, emergency operation is possible even in situations where the final position of the accelerator pedal can no longer be reached.

  This means that the output control device includes an accelerator pedal that can move between an initial position and a final position, and further includes a sensor that detects the operating position of the accelerator pedal, and a control unit that requests an output request to the engine. Achieved by: In this case, the control unit that obtains the output request applies the first dependency relationship between the output request and the operation position, or another dependency relationship between the output request and the operation position. In doing so, the first dependency or another dependency is applied according to the occurrence of the prescribed event, which is determined by the method described above.

  Unlike the prior art, the output control device according to the invention advantageously enables at least an emergency operation, even in situations where the final position of the accelerator pedal cannot be reached or can no longer be reached, or Operation up to the load is also possible. As a result, the driver can drive at least to the factory when a failure occurs.

  According to a third aspect of the present invention, there is proposed a computer program product comprising program code for performing a method according to any one of the above embodiments when executed in a data processing device. The This advantageously allows the method according to the invention to be automated over a wide range, for example in a control unit.

  Persons skilled in the art will be able to read other features and advantages of the present invention based on the following description of exemplary embodiments and with reference to the accompanying drawings. However, these embodiments are not to be construed as limiting the present invention.

The figure which shows schematically the output control apparatus of a motor vehicle engine. The figure which shows the 1st dependence of an output request | requirement and an operation position as a pedal characteristic curve. The figure which shows the 1st dependence of an output request | requirement and an operation position, and another dependence as a pedal characteristic curve on one common graph. FIG. 2b is a diagram showing a plurality of transient dependencies added between a first dependency and another dependency in the graph according to FIG. 2a. The figure which shows another embodiment as a pedal characteristic curve about another dependence relationship.

  All drawings are only schematic representations of a method, apparatus or computer program product according to the invention, or components thereof, according to an embodiment of the invention. In particular, the relationship between the distance and the size is not reproduced in full scale in these drawings. Corresponding elements are marked with the same reference symbols in the different drawings.

  FIG. 1 shows a very simple drawing of the output control device 950. The output controller 950 can be used, for example, in an automobile 900 with an engine 910, which can be implemented as an internal combustion engine and / or an electric motor, for example. For example, by using the electronic accelerator pedal 100 operated by the driver's foot 140 via the output control device 950, the output of the engine 910 can be subjected to open loop control and / or closed loop control. For this purpose, the operation position (S) of the accelerator pedal 100 or the gas pedal 100 is detected by the sensor 200, and the output of the engine 910 of the automobile 900 is controlled according to the open loop control and / or the operation position (S) of the accelerator pedal 100. Alternatively, closed loop control is performed. If the engine 910 is an internal combustion engine, for example, a throttle member not shown here, such as a throttle valve, is moved by an actuator, and if it is an electric motor, the electric power supplied to the electric motor is correspondingly controlled by open loop control and / or Alternatively, closed loop control is performed. When the accelerator pedal 100 is in the initial position (A), for example, a minimum output is required for the engine 910 as an idling state, while when the accelerator pedal 100 is in the final position (E), the engine 910 is For example, a maximum output request (Pmax) is required, and this can be made to correspond to all engine load points. Thus, the automobile 900 has an electronic gas system or an electronic accelerator pedal.

  In the case of the illustrated embodiment, the accelerator pedal 100 is supported so as to be able to turn between an initial position (A) and a final position (E) around the rotation shaft 112 at a portion of the support portion 110. For example, a return force can be applied to the accelerator pedal 100 in the direction of the initial position (A) by the elastic member 120 that can be configured as the spring 121. In this case, the spring 121 is attached to the spring support portion 124 and the accelerator pedal 100, thereby forming a return mechanism. For example, the sensor 200 that can be configured as a hall sensor or a resistance potentiometer detects the operating position (S) of the accelerator pedal 100 as, for example, the rotation angle 130 (α) of the accelerator pedal 100. According to another embodiment, linear motion can also be generated by the accelerator pedal 100, for example, the sensor 200 can be configured to detect the stroke distance traveled by the accelerator pedal 100. Data detected by the sensor 200 for the operating position (S) of the accelerator pedal 100 is transmitted to the control unit 500 via the signal line 210 schematically shown in FIG. The control unit 500 can be configured as a control device of the automobile 900 or an in-vehicle computer, for example. In this case, the control unit 500 may have a storage device (not shown) for storing data and / or functions and a processor (not shown). According to the data detected by the sensor 200 with respect to the operating position (S) of the accelerator pedal 100, for example, applying the first dependency 510 between the output request (PS) and the operating position (S) stored in the storage device Depending on the operating position (S) of the accelerator pedal 100, the output of the engine 910 of the automobile 900 is subjected to open loop control and / or closed loop control.

  In the case of FIG. 1a, the accelerator pedal 100 is depicted at its initial position (A) indicated by a solid line. The accelerator pedal 100 is drawn with a broken line with respect to its final position (E), and is represented by reference numeral 100b. The operation position (S) of the accelerator pedal 100 located between the initial position (A) and the final position (E) is drawn as a one-dot chain line and is denoted by reference numeral 100a. In the case of the final position (E), the elastic member 120 configured as the spring 121 is drawn with a broken line as a compressed form.

  According to the illustrated embodiment, the accelerator pedal 100 of the output control device 500 is configured as an active accelerator pedal. For this reason, the actuator member 300 is provided on the opposite side of the foot 140 below the accelerator pedal 100. The actuator member 300 can be configured as a motor, for example, and the motor supplies a force to the side opposite to the foot 140 in the accelerator pedal 100 via the transmission member 310, and this force is added to the force of the elastic member 120. Act. In this case, the force by the actuator member and the transmission member 310 can be applied depending on the situation, for example, the current traveling situation (speed, acceleration, distance from the preceding vehicle, etc.) and / or a specific acceleration pedal. It can be made dependent on reaching the operating position (S).

  During operation, the following may occur: That is, the actuator member 300 is no longer controllable and is blocked at a specific position (not shown), and the accelerator pedal 100 is moved to the initial position (A) and the final position ( It is impeded to be able to reach any operating position (S) between E). In such a situation, the final position (E) can no longer be reached, for example, even if a normal force is expended, i.e. a force generally consumed at the current position of the accelerator pedal. In this case, the maximum operating position (S) can be reached only from the initial position (A) to the first position (B) located between the initial position (A) and the final position (E). Such a situation may naturally occur in the case of a normal electronic accelerator pedal 100 that is not an active accelerator pedal. Such a situation or an event thus defined can be detected, for example, by the control unit 500 in such a way that an error signal is transmitted from the actuator member 300, for example. Therefore, the method according to the present invention intends to apply another dependency 550 between the operation position (S) and the output request (PS) for the output control of the engine 910 thereafter. In this way, even if the range of the operating position (S) of the reachable accelerator pedal 100 is limited, the engine output can still be used as effectively or completely as possible. .

  The first dependency 510 can be, for example, a pedal characteristic curve in which the value of the output request (PS) is associated with the value of the operation position (S). Further, the first dependency 510 can be a characteristic map in which the value of the output request (PS) is associated with the value of the operation position (S) or the pedal position. The first dependency relationship 510 can be a functional relationship in which a value for the output request (PS) can be calculated from the value of the operation position (S) or the pedal position. Such a dependency relationship, for example, the first dependency relationship 510 can be represented as the following graph. That is, according to this graph, for example, the values of the pedal position or the accelerator pedal operation position (S) are shown on the x-axis, and the output requests assigned to these values (y) are shown on the y-axis. The value of (PS) is shown. FIGS. 1 b-3 depict such graphical representations of the first dependency 510 and other dependencies.

  In FIG. 1b, a first dependency 510 is shown in a graph, according to which the operating position (S) or pedal position detected by the sensor 200 is shown on the x-axis. . In this case, the operation position (S) can be between the initial position (A) and the final position (E) indicated at the origin. According to the accelerator pedal embodiment, the operating position (S) can be measured in units of angle, for example as the rotation angle α, or it can be measured in units of length, for example in millimeters, for example as the travel distance s. . On the y-axis, the output P required for the engine 910 is shown in units of Nm, or the required rotational torque T is shown in units of Nm. An output request (PS) is assigned to each operating position (S). The relationship between the operating position (S) and the output request (PS) can be read or determined based on the illustrated solid line of the pedal characteristic curve for the first dependency 510. When the accelerator pedal reaches the final position (E), the maximum output request (Pmax) is reached. According to this dependency relationship, the output request increases when the accelerator pedal position increases, and reaches the maximum output request at the final position (E).

  In FIG. 2a, a first dependency 510 according to FIG. 1b and another dependency 550 applied by the method according to the invention after the occurrence of a defined event are shown in a single graph. On the x-axis, the first position (B) of the accelerator pedal 100 that can still be achieved to the maximum even after the occurrence of the prescribed event is shown. In the illustrated graph, this other dependency 550 is obtained from the first dependency 510 by compressing the first dependency 510 along the x-axis. At this time, with respect to the initial position (A), the value of the output request (P) of the first dependency 510 and the other dependency 550 is the same.

In the illustrated graph, the maximum output request (Pmax) is reached at the virtual operation position (F), and in this case, the virtual operation position (F) corresponds to the first position (B). . Therefore, according to another dependency 550 shown in this figure, the full power range or full power of the engine 910 is reached within the reachable pedal travel from the initial position (A) to the first position (B). Can use all the output demands. According to FIG. 2a, a predetermined output request (PS0) is determined for the operating position (S) located between the initial position (A) and the first position (B) in the case of the first dependency 510. be able to. On the other hand, when another dependency 550 is applied after the occurrence of a prescribed event, the value of the output request (PS5) is larger than that for the same operation position (S). For example, another dependency 550 can be obtained from the first dependency 510 by multiplying the corresponding value of the pedal position by the proportionality coefficient a for each value of the output request. In this case, the proportionality coefficient a may be a constant or may depend on the operating position (S). For example, the proportionality coefficient a can be obtained from the following equation.
a = SB / SE
However, SB corresponds to the position difference between the first position (B) and the initial position (A), and SE corresponds to the position difference between the final position (E) and the initial position (A).

  Similarly, another dependency 550 may be formed by compressing the first dependency 510 along the y-axis. Alternatively, it may be formed by compression along the x-axis and y-axis, in which case, for example, different compression coefficients or proportional constants are applied to the compression along the x-axis and the compression along the y-axis, respectively. Can do. In this way, for example, in the graph of FIG. 2a, when the compression is additionally performed along the y-axis, the maximum output request (Pmax) is obtained when the accelerator pedal 100 is in the first position (B). It can be said that it is not issued. Rather, what is required is lower than the maximum output requirement (Pmax), but at the same time than the output requirement required for the first position (B) when applying the first dependency 510 by this method. Is also a high value.

In FIG. 2b, a new graph based on FIG. 2a is depicted. However, four transient dependencies 512, 514, 516, and 518 are further written in this graph as a specific example. These transient dependencies 512, 514, 516, and 518 are obtained, for example, by gradually compressing the first dependency 510 along the pedal position axis or the x-axis. Transient dependency relationships 512, 514, 516, and 518 are located between the first dependency relationship 510 and another dependency relationship 550. In this method, for the purpose of obtaining an output request to the engine 910 from the operation position (S), another dependency 550 is generated after a predetermined event occurs between the first dependency 510 and another dependency 550. During the transition period Δt until the application of, the transient dependence relationships 512, 514, 516 and 518 can be applied. In this case, for each of the transient dependency relationships 512, 514, 516, and 518, each of the virtual dependencies moves in stages from the final position (E) toward the virtual operation position (F) of another dependency relationship 550. The maximum output request (Pmax) for the operating position (F1, F2, F3, F4) is set. These transient dependencies 512, 514, 516, 518 are achieved by the fact that the transition from the first dependency 510 to another dependency 550 does not take place abruptly, but a gradual adaptation is achieved. This will allow the driver to adapt to the new situation of the method. Therefore, in the operation position corresponding to the first position (B), when a transition is made from one dependency relationship to the next dependency relationship, an increase due to a gradual increase in output request occurs. In 2b, it is represented by a section along the y-axis with reference signs ΔP1, ΔP2, ΔP3, ΔP4 and ΔP5.

  In one fixed operating position (S), the increase in the output demand for the engine that occurs each time when shifting from one dependency relationship to the next dependency relationship is performed by gradual increase as described below. When the transition from the first dependency relationship 510 to the first transient dependency relationship 512 occurs, the output request at the fixed operation position (S) increases from PS0 to PS1. Then, when transitioning from the first transient dependency 512 to the second transient dependency 514, the output requirement rises to PS2, and the second transient dependency 514 to the third transient dependency 514. When the transition is made to the dependency relationship 516, the output request increases to the value PS3, and when the transition is made from the third transient dependency relationship to the fourth transient dependency relationship 518, the output request increases from PS3 to PS4. . Finally, another dependency relationship 550 is applied, and when this another dependency relationship 550, the output request PS5 is used for the fixed operation position (S) illustrated in this graph.

  Preferably these transient dependencies are staged closely to each other as follows. That is, for each of the fixed operation positions (S) between the initial position (A) and the first position (B), the output request increase rate that gradually increases between two successive dependencies is 5 Not to be greater than 1% and not to be greater than the ideal 1%.

  In this case, the transition period for applying the first dependency 510 to another dependency 550 can be several seconds to several tens of seconds, for example, 30 seconds or even 60 seconds. Also good. Note that the number of transient dependencies can be set in accordance with the position of the first position. That is, as the first position (B) approaches the initial position (A), for example, more transient dependency relationships can be provided. These transient dependencies can be applied each time over a predetermined period, for example from a few ms to a few tens of ms, for example from 10 ms to a period of a few seconds, for example 5 seconds, after which the next dependency is Applied.

  FIG. 3 shows a graph according to yet another embodiment of another dependency 550. Another dependency 550 shown here has a maximum output request (Pmax) at the virtual operating position (F). In this case, the virtual operation position (F) is located between the first position (B) and the final position (E) that the accelerator pedal 100 can actually reach yet. Another dependency 550 is obtained from the first dependency 510, for example by compression along the x-axis. In this case, another dependency 550 depicted here results in a maximum achievable output demand (PSmax) when the accelerator pedal 100 is in the first position (B), which is a maximum. It is reduced from the output request (Pmax). In this way, by introducing the virtual operation position (F), another dependency 550 as described below can be easily generated. That is, in the case of this different dependency relationship 550, the maximum output request (PSmax) that can be achieved at the first position (B) is reduced from the maximum output request (Pmax). It is larger than the case of the dependency relationship 510. At the same time, in this way, (additional) compression of the first dependency 510 along the y-axis can be omitted for the purpose of generating another dependency 550.

  The proposed method can be stored in the storage device of the control unit 500 as a computer program product, for example, and can be executed in accordance with various input parameters in the processor of the control unit 500.

  The proposed method or the proposed output control device 950 can be generally applied to determine the output demand, or the engine open loop control in an automobile using an electronic accelerator pedal or an electronic gas pedal. Alternatively, it can be applied in closed loop control.

Claims (11)

A method for open loop control and / or closed loop control of an output of an engine (910),
Detecting an operating position (S) of an accelerator pedal (100) movable between an initial position (A) and a final position (E);
Applying a first dependency (510) between the operating position (S) and the output request (PS) to determine an output request (PS) for the engine (910);
In a method comprising:
The accelerator pedal (100) is an active accelerator pedal provided with an actuator member (300) that acts on the accelerator pedal (100).
After the occurrence of a specified event, an output request (PS) to the engine (910) is obtained by applying another dependency (550) between the operating position (S) and the output request (PS),
In the prescribed event, the accelerator pedal (100) can be moved only to the first position (B) located between the initial position (A) and the final position (E) even if normal force is consumed. There is no situation
During the transition period (Δt) from the occurrence of the prescribed event to the application of the other dependency relationship (550), the output request (PS) to the engine (910) is set to the accelerator pedal (100). Applying at least one transient dependency (512, 514, 516, 518) between the output request (PS) and the operating position (S) to assign to the operating position (S) ;
By means of compression along an axis having the value of the operating position (S) and / or compression along an axis having the value of the output demand (PS), the further dependency (550) is changed to the first dependency. (510), the compression along the axis having the value of the operating position (S) and the compression along the axis having the value of the output request (PS) can be applied with respective compression coefficients. is there,
A method of performing open loop control and / or closed loop control of the output of the engine (910). The first dependency relationship (510) assigns a gradually increasing output demand (PS) to the engine (910) to a gradually increasing value of the operating position (S) of the accelerator pedal (100),
A maximum output request (Pmax) is assigned to the final position (E) of the accelerator pedal (100),
In the another dependency relationship (550), an output request (PB) in a range of 90% to 100% of the maximum output request (Pmax) is assigned to the first position (B).
The method of claim 1. In the different dependency relationship (550), the operating position (S) is gradually increased to the engine (910) until the first position (B) is reached from the initial position (A). A progressively increasing value of the output request (PS) is assigned,
The method of claim 2. The compression is linear compression;
4. A method as claimed in any one of claims 1 to 3 . For each value of the operation position (S), an output request (at the time of the operation position (S)) from two dependency relationships (510, 512, 514, 516, 518, 550) applied in succession ( The relative difference of PS) is at most 5%,
5. A method according to any one of claims 1 to 4 . For each value of the operation position (S), an output request (at the time of the operation position (S)) from two dependency relationships (510, 512, 514, 516, 518, 550) applied in succession ( The relative difference of PS) is at most 1%,
5. A method according to any one of claims 1 to 4 . The first dependency (510), the another dependency (550), and the at least one transient dependency (512, 514, 516) between the output request (PS) and the operating position (S). 518) is stored in the storage device as a pedal characteristic curve, and in the pedal characteristic curve, the value of the output request is assigned to the value of the pedal position, or
The first dependency (510), the another dependency (550), and the at least one transient dependency (512, 514, 516) between the output request (PS) and the operating position (S). 518) is stored in the storage device as a characteristic map, and in the characteristic map, the value of the output request is assigned to the value of the pedal position, or
The first dependency (510), the another dependency (550), and the at least one transient dependency (512, 514, 516) between the output request (PS) and the operating position (S). 518) is stored in the storage device as one or more functional relationships, and the value of the output request is calculated from the value of the pedal position based on the one or more functional relationships.
7. A method according to any one of claims 1-6 . The engine (910) is an engine (910) of an automobile (900).
Any one process as claimed in claims 1 to 7. An output control device for the engine (910),
In the output control device, the method according to any one of claims 1 to 8 is performed,
The output control device
An accelerator pedal (100) movable between an initial position (A) and a final position (E);
A sensor (200) for detecting the operating position (S) of the accelerator pedal (100);
A control unit (500) for determining an output request (PS) to the engine (910);
Including
The control unit (500) for obtaining the output request (PS) may include a first dependency relationship (510) between the output request (PS) and the operation position (S), or the output request (PS) and the Apply another dependency (550) with the operating position (S),
Output control device for the engine (910). The output control device of the engine (910) is an output control device of the engine (910) of the automobile (900).
The output control device for an engine (910) according to claim 9 . A computer program comprising program code for carrying out the method according to any one of claims 1 to 8 , when executed in a data processing device.

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