JP6182310B2 - Idle stop & start control device - Google Patents

Description

  The present invention relates to an idle stop & start control device that automatically stops an engine when a predetermined stop condition is satisfied and then automatically starts the engine when a predetermined start condition is satisfied.

In recent years, from the viewpoint of environmental protection and fuel economy, a so-called idle stop and start function has been introduced that automatically stops the engine when the vehicle stops temporarily, such as waiting for a signal at an intersection, and then starts the engine automatically when starting off. The equipped vehicle is put into practical use.
For example, the stop conditions for automatically stopping the engine are preset such that the vehicle speed is 0 (zero), the accelerator operation is in an off state, and the brake operation is in an on state. When all the conditions are continued for a predetermined time set in advance, the engine is automatically stopped.
Further, for example, as a starting condition for automatically starting the engine, it is set in advance that the brake operation is in an off state, and the engine is automatically started when this condition is satisfied.

  By the way, there are various vehicle stop conditions on the road, and even if the stop condition is appropriately set, the engine may be automatically stopped unnecessarily. For example, when the vehicle has an intention to start immediately, such as when the vehicle is temporarily stopped at an intersection, the engine should not be automatically stopped.

  Therefore, Patent Document 1 discloses an idle stop & start control device in which it is added that the foot brake is strongly depressed as a stop condition when the engine is automatically stopped. This device automatically stops the engine because the intention to stop is clear when the foot brake is strongly depressed, but it often has an intention to start immediately when the foot brake is lightly depressed. Is not automatically stopped.

JP-A-11-324755

However, in the idle stop & start control device described in Patent Document 1, safety is ensured by applying the brakes for a moment and applying the brakes suddenly. After that, when the brakes are applied lightly, a predetermined stop condition is satisfied. The engine stops automatically to fill. If the driver has stepped on the brake suddenly and safety is ensured, and then the driver intends to start immediately by stepping on the brake lightly, the driver will feel uncomfortable if the engine stops automatically.
Furthermore, when the driver is willing to start and the engine is automatically stopped, the driving feeling is deteriorated due to the start delay generated for starting the engine. Therefore, there has been a demand for the development of an idle stop & start control device that can more accurately determine whether or not the engine can be automatically stopped.

  Therefore, the present invention is an invention made under the above-described state of the art, and provides an idle stop & start control device that allows the driver to automatically stop the engine without feeling uncomfortable by operating the foot brake. The purpose is that.

The present invention has been invented to solve the above-described problems in the prior art, and the idle stop & start control device of the present invention automatically stops the vehicle engine when a predetermined stop condition is satisfied. And an idle stop & start control device that is provided in a vehicle that automatically starts the engine when a predetermined start condition is established, and that can control automatic stop and automatic start of the engine,
A brake switch for detecting whether the foot brake is on or off;
Brake depression strength detecting means for detecting the depression strength of the foot brake;
A stepping timer for counting a stepping time exceeding the predetermined value when a detection value detected by the brake stepping strength detection unit exceeds a predetermined value set in advance;
A stepping time determining means for determining whether or not the stepping time counted by the stepping timer is equal to or longer than a predetermined time set in advance;
An elapsed time timer that counts the elapsed time since the predetermined stop condition is satisfied ,
The predetermined stop condition includes that a detection result by the brake switch is in an ON state, and the stepping time determination means includes the stepping time being equal to or longer than the specified time, and the elapsed time timer counts the predetermined time or more. Then, the engine is automatically stopped.

According to the idle stop & start control device of the present invention, the engine is automatically stopped only when the brake is depressed more than a predetermined value and depressed for a specified time or more, for example, 1 or 2 seconds or more. The driver will not feel uncomfortable even if the engine is automatically stopped after the brake is strongly depressed because the intention to stop is clear when the brake is strongly depressed. Further, since it is possible to determine whether or not to automatically stop the engine based on the foot brake depression time, it is possible to remove a sense of incongruity in the operation of the driver.
When the driver wants to automatically stop the engine, the foot brake only needs to be stepped on for a specified time, so that it is not necessary to step on the brake for a long time. For this reason, it becomes possible to automatically stop the engine by the natural stopping operation of the driver.
By the way, the operation of lightly depressing the brake often causes the driver to feel uncomfortable when the engine automatically stops, as the driver often intends to start immediately, such as when the vehicle is temporarily stopped at the intersection. End up. However, according to the idle stop & start control device of the present invention, the engine is not automatically stopped only by stepping on the brake, so that the driver is not uncomfortable.
Further, safety is ensured by applying the brakes for a moment and applying the brakes suddenly, and after that, even when the brakes are lightly pressed, the driver will feel uncomfortable if the engine automatically stops. However, according to the idle stop & start control device of the present invention, the engine is not automatically stopped by simply depressing the brake strongly, but is automatically stopped when the engine is depressed strongly for a predetermined time or more. Is reflected and does not give driver discomfort.

Further, during the counting of the elapsed time by pre Symbol age timer, the range change detecting means for detecting the presence of the range position change of the shift lever,
Range position detection means for detecting the position of the shift lever when the vehicle stops and when the range change detection means detects that there is a change in range position;
When it is detected that there is change of the range position by the range change detecting means, the range position of when the vehicle detected is stopped by the range position detecting means in any of the D alkylene di及 beauty N range, and range position after range position change and a determining range position determining means for determining whether either the D alkylene di及 beauty N range,
By the range position determination means, range position when the vehicle is stopped is either D alkylene di及 beauty N range, and the range position after range position change in either D alkylene di及 beauty N range If it is determined that there is a range position change by the range change detection means, the engine is turned off until an elapsed time by the elapsed time timer has passed a predetermined time. It is good also as not stopping automatically.

Thus, even if the range position of the shift lever is changed after the predetermined stop condition is satisfied, the engine can be automatically stopped when the predetermined time has elapsed without automatically stopping the engine within the predetermined time. .
In addition, the D range, M range, and N range in this specification have each shown the driving | running | working range, the manual range, and the neutral range.
Conventionally, when the range position of the shift lever is changed after the predetermined stop condition is satisfied, the predetermined stop condition and elapsed time are reset, and after the range position is changed, it is confirmed whether or not the predetermined stop condition is satisfied again. The elapsed time is counted after confirming that the stop condition is satisfied. Therefore, after changing the range position, it is necessary to depress the brake again strongly in order to satisfy a predetermined stop condition. For this reason, when the driver forgets that the stop condition is reset by changing the range position, the driver does not step on the brake again, so the predetermined stop condition is not satisfied and the engine does not automatically stop. At this time, the driver is uncomfortable because the engine does not automatically stop.
However, the idle stop & start control device of the present invention does not reset the predetermined stop condition even if the shift lever range position is changed after the predetermined stop condition is satisfied. Can be stopped. This eliminates the need for the driver to step on the brakes again, thus providing a user-friendly operation method.

  In addition, a display lamp may be provided that blinks until the predetermined time elapses after the predetermined stop condition is satisfied, and lights up while the engine is automatically stopped.

  In this way, since it blinks until a predetermined time elapses after the predetermined stop condition is satisfied, the driver can predict that the engine will automatically stop soon. Thereby, even if the engine is automatically stopped, the driver can confirm that the engine has been automatically stopped by the idle stop & start control, not the failure. Further, since the light is lit while the engine is automatically stopped, it can be confirmed that the engine is stopped by the idle stop & start control. Therefore, these can be combined to give the driver a sense of security.

  ADVANTAGE OF THE INVENTION According to this invention, the idle stop & start control apparatus which a driver | operator can automatically stop an engine without a sense of incongruity by operation of a foot brake can be provided.

It is a figure which shows schematic structure of the part relevant to the idle stop & start control apparatus of the vehicle which concerns on embodiment of this invention. It is a block diagram which shows the structure of the idle stop & start control apparatus which concerns on embodiment of this invention. It is a figure which shows the control flow of the idle stop & start control apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are merely illustrative examples and are not intended to limit the scope of the present invention only unless otherwise specified.

FIG. 1 is a diagram showing a schematic configuration of a portion related to an idle stop & start control device for a vehicle according to an embodiment of the present invention.
As shown in FIG. 1, the power of the engine 10 is transmitted to an automatic transmission (hereinafter simply referred to as a transmission 7) via a clutch device 3 mounted on the downstream side of the power system of the engine 10 of the vehicle 1. It has come to be.
The clutch device 3 is a device that transmits or interrupts the power of the engine 10 to the transmission 7.

The transmission 7 is provided with a gear position sensor 4 for detecting a gear range and a gear shift unit 5 for switching the gear.
The gear shift unit 5 includes a plurality of air cylinders that operate shift forks corresponding to the respective shift stages in the transmission 7 and a plurality of electromagnetic valves that operate each air cylinder. In the gear shift unit 5, the air cylinder operates according to the opening and closing of the electromagnetic valve.
The transmission 7 can be automatically shifted by the operation of the air cylinder.

FIG. 2 is a block diagram showing the configuration of the idle stop & start control device according to the embodiment of the present invention.
As shown in FIG. 2, the vehicle 1 automatically stops the engine 10 when a predetermined stop condition is satisfied, and then automatically starts the engine 10 when a predetermined start condition is satisfied. 2 and an engine ECU 20 that stops or starts the engine 10 in response to an engine stop request from the idle stop & start control device 2.

  The idle stop & start control device 2 includes an ISS-ECU 30 that issues an engine stop request when a stop condition of the engine 10 is satisfied.

The ISS-ECU 30 and the engine ECU 20 are connected to each other via a CAN (control area network) 50.
The ISS-ECU 30 outputs an engine stop permission signal to the engine ECU 20 via the CAN 50. Further, the engine ECU 20 operates in association with each other by outputting an acceptance signal for the engine stop request to the ISS-ECU 30 via the CAN 50.

The idle stop & start control device 2 includes an engine stop condition determining unit 31 that determines a stop condition of the engine 10. The engine stop condition determining means 31 is provided in the ISS-ECU 30.
The stop condition of the engine 10 is that the vehicle 1 is stopped (vehicle speed = 0 and accelerator operation amount = 0 (accelerator operation is off)) and the foot brake is being depressed (brake operation is on). It is included that the range position of the shift lever 17 is any one of the N range, D range, and M range, and that the foot brake is stepped on more than a specified time.

  As means for detecting these stop conditions, the idle stop & start control device 2 includes a brake switch 11 for detecting an on state or an off state of the foot brake, and a brake depression strength detecting means for detecting the depression strength of the foot brake. 12.

  When the brake pedal 9 is depressed, the brake switch 11 generates a brake ON signal and outputs it to the engine ECU 20.

The brake depression strength detecting means 12 is a pressure sensor that detects the pressure of the brake fluid, and detects a high brake pressure when the brake pedal 9 is strongly depressed. The brake pressure detected by the brake depression strength detecting means 12 is output to the engine ECU 20.
The foot brake ON signal and the brake pressure are output from the engine ECU 20 to the ISS-ECU 30.

  Further, the idle stop & start control device 2 includes a stepping timer 32 that counts a stepping time after the foot brake is strongly depressed, and a stepping time determination unit 33 that determines whether or not the time when the brake is strongly depressed is equal to or longer than a predetermined time. And.

  The stepping timer 32 detects a stepping time when the brake pressure exceeds a predetermined value set in advance. That is, the depression time when the brake is depressed strongly continuously is counted. The depression time counted by the depression timer 32 is output to the depression time determination means 33.

The stepping time determination means 33 determines whether or not the stepping time counted by the stepping timer 32 is equal to or longer than a preset specified time.
In this embodiment, the specified time is 1 second. That is, it is determined whether or not one second or more has elapsed since the brake pressure exceeded a predetermined value.
The stepping time determination means 33 creates a stepping condition permission signal when it is determined that the stepping time is equal to or longer than the specified time.
The depression condition permission signal is output to the engine stop condition determination means 31.

  Further, the idle stop & start control device 2 includes a range position detection sensor 13 (corresponding to the range position detection means), an accelerator sensor 15, and a vehicle speed sensor 16.

The range position detection sensor 13 detects the position of the shift lever 17 of the vehicle 1.
The accelerator sensor 15 detects the amount of operation of the accelerator pedal 18.
The vehicle speed sensor 16 is provided on the output shaft 8 of the transmission 7 and detects the vehicle speed from the rotational speed of the output shaft 8.
Detection results respectively detected by the range position detection sensor 13, the accelerator sensor 15, and the vehicle speed sensor 16 are output to the engine ECU 20, and are output from the engine ECU 20 to the ISS-ECU 30.

Further, the idle stop & start control device 2 includes range position determination means 35 for determining whether or not the shift lever 17 detected by the range position detection sensor 13 is in a desired range position.
Based on the result detected by the range position detection sensor 13, the range position determination unit 35 determines whether the range position of the shift lever 17 when the vehicle 1 is stopped is the D range, the M range, or the N range. Determine whether or not.
And the range position determination means 35 produces the range position permission signal which shows that a range position is a desired position, when it determines with a range position being any of D range, M range, and N range. The range position permission signal is output to the engine stop condition determination means 31.

The engine stop condition determination means 31 includes a vehicle speed detected by the vehicle speed sensor 16, an accelerator operation amount detected by the accelerator sensor 15, a brake operation ON signal by the brake switch 11, a range position permission signal by the range position determination means, and a depression time. Based on the determination condition permission result by the determination means, it is determined whether or not the stop condition of the engine 10 is satisfied.
Specifically, when the vehicle speed = 0, the accelerator operation amount = 0, and the brake stop signal, the range position permission signal, and the depression condition permission signal are received, the engine stop condition determination unit 31 determines that the stop condition of the engine 10 is It is determined that it has been established.

If the stop condition of the engine 10 is satisfied, the engine stop condition determination means 31 creates an engine stop permission signal indicating that the stop condition is satisfied.
The engine stop permission signal is output from the engine stop condition determining means 31 to the engine ECU 20.

  Further, when the stop condition of the engine 10 is established, the engine stop condition determination means 31 creates a preparation signal indicating that the idle stop & start is in the preparation state. The prepared preparation signal is output from the engine stop condition determination unit 31 to the display control unit 36.

The display control means 36 creates a blinking signal for blinking the ISS indicator lamp 40 based on the preparation signal. The created blinking signal is output from the display control means 36 to the ISS indicator lamp 40.
The ISS indicator lamp 40 is driven to blink based on the blink signal.

In addition, the idle stop & start control device 2 includes an elapsed time timer 34 that detects an elapsed time after the stop condition of the engine 10 is established.
The elapsed time timer 34 counts the elapsed time after the engine stop condition determining means 31 determines that the stop condition of the engine 10 is satisfied.
The elapsed time counted by the elapsed time timer 34 is output to the engine ECU 20.

Further, the idle stop & start control device 2 includes range change detection means 14 for detecting whether or not the range position is changed by operating the shift lever while the elapsed time timer 34 is operating. The range change detection means 14 is provided in the engine ECU 20.
The range change detection means 14 detects whether or not the range position has been changed by operating the shift lever 17 while the elapsed time timer 34 is operating. For example, after the stop condition of the engine 10 is established, it is detected that the shift lever 17 is changed from the D range to the N range or changed from the N range to the D range.
When the range change detection means 14 detects that the range position has been changed, the range position detection sensor 13 detects the range position of the shift lever 17 after the range position is changed.

In a general conventional vehicle, when the elapsed time timer 34 is operating, that is, after the stop condition of the engine 10 is established, when the shift lever 17 is operated and the range position is changed, the stop condition and the elapsed time timer 34 are After the range position is changed, the stop condition is determined again and the elapsed time timer 34 starts counting. In the idle stop & start control device 2 of the present invention, the range position is changed while the elapsed time timer 34 is operating. Even if it is changed, if the range position of the shift lever 17 after the change is any of the D range, M range, and N range (details will be described later), the count is continued without resetting the elapsed time timer 34. .
After the range position is changed, the detection result detected by the range position detection sensor 13 is output to the engine ECU 20 and is output from the engine ECU 20 to the ISS-ECU 30.

When the shift lever 17 is operated and the range position is changed while the elapsed time timer 34 is in operation, the range position determination means 35 indicates that the range position is the D range, M range, and N range before and after the shift lever 17 is changed. It is determined whether it is any of these.
Specifically, the range position before the shift lever change (before the stop condition is established) is any of the D range, the M range, and the N range, and the range position after the range position change is the D range, the M range, and the N range. It is determined whether it is in one of the ranges.

Then, the range position determination means 35 has the range position before the shift lever change (before the stop condition is established) either the D range, the M range or the N range, and the range position after the range position change is the D range, M When it is determined that the range is one of the range and the N range, a range position permission signal indicating that the range position is a desired position is created. In such a case, although the change of the range position is detected by the range change detection means 14, the elapsed time timer 34 continues without stopping counting.
The range position permission signal is output to the engine stop condition determination means 31.

Further, the idle stop & start control device 2 includes an engine stop control means 21 for executing an automatic stop of the engine 10. The engine stop control means 21 is provided in the engine ECU 20.
The engine stop control means 21 prepares to stop the engine 10 based on the engine stop permission signal from the engine stop condition determination means 31. That is, the engine 10 is not yet stopped in a state where the engine stop permission signal is received.
Furthermore, when the engine stop control means 21 receives the engine stop permission signal, the engine stop control means 21 subsequently determines whether or not the elapsed time output from the elapsed time timer is equal to or longer than a predetermined time set in advance.
The engine stop control means 21 generates an acceptance signal for stopping the engine 10 and stopping the engine 10 when it is determined that the elapsed time is equal to or longer than the predetermined time, that is, the elapsed time has passed the predetermined time. . The acceptance signal is output to ISS-ECU 30.

And the display control means 36 produces the lighting signal which shows that it is an idle stop & start state based on an acceptance signal. The created lighting signal is output to the ISS indicator lamp 40.
The ISS indicator lamp 40 lights the ISS indicator lamp 40 continuously based on the lighting signal.

  A control flow of the idle stop & start control device 2 configured as described above will be described below.

FIG. 2 is a diagram showing a control flow of the idle stop & start control device 2 according to the embodiment of the present invention.
As shown in FIG. 2, first, after inputting each detection value from the brake switch 11, the brake depression strength detecting means 12, the range position detection sensor 13, the accelerator sensor 15, the vehicle speed sensor 16 and the like (step S1), Subsequently, it is determined whether or not the vehicle 1 is stopped (step S2).
In the present embodiment, it is assumed that the vehicle 1 is stopped in a state where the vehicle speed = 0 and the accelerator operation amount = 0.

When it is determined that the vehicle 1 is not stopped (step S2: NO), the engine automatic stop is not executed (step S3).
On the other hand, when it is determined that the vehicle 1 is stopped (step S2: YES), it is subsequently determined whether an automatic stop precondition is satisfied (step S4).
In the determination of the automatic stop precondition, it is determined whether or not states such as the water temperature of the engine 10 and the road surface gradient, which are general preconditions, satisfy preset conditions.

When it is determined that the automatic stop precondition is not satisfied (step S4: NO), the engine automatic stop is not executed (step S3).
On the other hand, when it is determined that the automatic stop precondition is satisfied (step S4: YES), the range position of the shift lever 17 is subsequently detected by the range position detection sensor 13 (step S5).

  Next, the range position determination means 35 determines whether or not the range position detected by the range position detection sensor 13 is any of the D range, M range, and N range (step S6).

If it is determined that the range position is, for example, an R (reverse) range other than the D range, M range, and N range (step S6: NO), the engine automatic stop is not executed (step S3).
On the other hand, when it is determined that the range position is any one of the D range, the M range, and the N range (step S6: YES), it is subsequently determined whether or not the brake is strongly depressed (step S7).
More specifically, the brake pressure is detected by the brake depression strength detecting means 12, and the brake pressure exceeds a predetermined value set in advance, and the time when the brake pressure is depressed beyond the predetermined value is set in advance. Judge whether it is more than time.

When the brake pressure exceeds a predetermined value and the pedal continues to be depressed for a predetermined time after exceeding the predetermined value, it is determined that the brake is strongly depressed.
On the other hand, when the brake pressure does not exceed the predetermined value or when the brake pressure exceeds the predetermined value and the brake pressure is not depressed for a predetermined time or more, it is determined that the brake is not strongly depressed.

If it is determined that the brake is not strongly depressed (step S7: NO), the engine automatic stop is not executed (step S3), assuming that there is no indication of the driver's intention to stop the engine 10.
If it is determined that the brake has been stepped on strongly (step S7: YES), it is then determined whether or not a predetermined automatic stop condition is satisfied (step S8).

The engine stop condition determination unit 31 is configured to receive the engine 10 when the vehicle 1 is stopped (the vehicle speed = 0 and the accelerator operation amount = 0) and all of the brake ON signal, the range position permission signal, and the depression condition permission signal are received. It is determined that the stop condition is satisfied.
If any one of these is not satisfied, it is determined that the stop condition of the engine 10 is not satisfied (step S8: NO), and the automatic engine stop is not executed (step S3).
On the other hand, when it is determined that the stop condition of the engine 10 is satisfied (step S8: YES), the engine stop condition determining means 31 outputs an engine stop permission signal to the engine ECU 20.
The engine stop control means 21 makes preparations for stopping the engine 10 based on the engine stop permission signal.

  Next, the elapsed time timer 34 starts counting elapsed time (step S9).

Subsequently, it is determined whether or not there is a change in the range position of the shift lever 17 during the elapsed time counting (step S10).
Whether or not the range position is changed is detected by the range change detecting means 14. For example, it is detected that the shift lever 17 has been changed from the D range to the N range or from the N range to the D range.
When it is determined that the range of the shift lever 17 has been changed (step S10: YES), the range position after the range change is detected by the range position detection sensor 13 (step S11).

Next, it is determined whether or not the range position detected by the range position detection sensor 13 is any of the D range, M range, and N range (step S12).
If the changed range position is one of the D range, M range, and N range (step S12: YES), then, similarly to step S8, it is determined whether or not a predetermined automatic stop condition is satisfied. (Step S13).
Since the brake OFF operation or the like may be performed during the elapsed time count and the automatic stop condition may not be satisfied, it is determined again whether or not the automatic stop condition is satisfied before the elapsed time determination (step S14) described later. .
The engine stop condition determination unit 31 is configured to receive the engine 10 when the vehicle 1 is stopped (the vehicle speed = 0 and the accelerator operation amount = 0) and all of the brake ON signal, the range position permission signal, and the depression condition permission signal are received. It is determined that the stop condition is satisfied.
If any one of these is not satisfied, it is determined that the stop condition of the engine 10 is not satisfied (step S13: NO), the engine stop permission signal is withdrawn, and the engine automatic stop is not executed. (Step S3).
On the other hand, when it is determined that the stop condition of the engine 10 is satisfied (step S13: YES), the engine stop condition determining means 31 continues to output the engine stop permission signal to the engine ECU 20. Accordingly, the engine stop control means 21 continues to prepare for stopping the engine 10 based on the engine stop permission signal.
If step S13 is YES, it is then determined whether or not the elapsed time by the elapsed time timer 34 has elapsed for a predetermined time, for example, 8 seconds or more (step S14).
In the present embodiment, the predetermined time is set to 8 seconds, but is not limited to this value. The range position when the vehicle 1 stops (the range position before the stop condition of the engine 10 is satisfied) or after the change. The time can be appropriately set depending on the range position.

If the elapsed time by the elapsed time timer 34 has not passed 8 seconds or more (step S14: NO), for the purpose of continuing to monitor the range position and the establishment of the automatic stop condition so that a YES determination is made in step S14, Returning again to step S10, it is determined whether or not the range position of the shift lever 17 has been changed while the elapsed time is being counted.
On the other hand, when the elapsed time by the elapsed time timer 34 has passed 8 seconds or more (step S14: YES), the engine stop control means 21 executes the automatic stop control of the engine 10 to stop the engine 10 (step S14). S15).

  By the way, when it determines with there being no change of the range position of the shift lever 17 in step S10 (step S10: NO), step S13 is implemented continuously.

According to the above-described idle stop & start control device 2 according to the present embodiment, the engine 10 automatically stops only when the brake is stepped on more than a specified time. Since the operation of depressing the brake strongly is performed when the vehicle 1 is surely stopped, the driver does not feel uncomfortable even if the engine 10 is automatically stopped after the operation of depressing the brake strongly.
In addition, since the driver can determine whether or not to automatically stop the engine 10 based on the foot brake stepping time, it is possible to eliminate a sense of incongruity in the operation of the driver.
And since it is sufficient to step on the foot brake for a specified time, it is not necessary to step on the brake for a long time. For this reason, the engine 10 can be automatically stopped by a natural stop operation of the driver.

By the way, since the operation of lightly depressing the brake often starts immediately in an intersection or the like, the driver will feel uncomfortable when the engine 10 automatically stops. However, according to the idle stop & start control device 2 of the present invention, the engine 10 is not automatically stopped only by lightly depressing the brake, so that the driver does not feel uncomfortable.
Also, safety is ensured by applying the brakes for a moment and applying the brakes suddenly, and thereafter, the driver will feel uncomfortable if the engine 10 automatically stops even when the brakes are applied lightly. However, according to the idle stop & start control device 2 of the present invention, the engine 10 is not automatically stopped by simply depressing the brake strongly, but is automatically stopped when it is depressed strongly for a predetermined time or more. The driver's will is reflected and the driver is not uncomfortable.

Then, even if the range position of the shift lever 17 is changed after a predetermined stop condition is satisfied by depressing the brake strongly, the engine 10 can be automatically stopped after a predetermined time has elapsed.
For example, when the engine 10 is automatically stopped when a predetermined time elapses after the predetermined stop condition is satisfied, conventionally, when the range position of the shift lever 17 is changed after the predetermined stop condition is satisfied, the predetermined stop condition and The elapsed time is reset, and after changing the range position, it is confirmed again whether a predetermined stop condition is satisfied, and the elapsed time is detected after the stop condition is satisfied. Therefore, after changing the range position, it is necessary to depress the brake again strongly in order to satisfy a predetermined stop condition. For this reason, when the driver forgets that the stop condition is reset by changing the range position, the driver does not depress the brake strongly again, so the predetermined stop condition is not satisfied and the engine 10 does not automatically stop. . At this time, since the engine 10 does not automatically stop, the driver feels uncomfortable.
However, in the idle stop & start control device 2 of the present invention, even if the range position of the shift lever 17 is changed, the predetermined stop condition is not reset, so that the engine 10 can be automatically stopped after a predetermined time has elapsed. . This eliminates the need for the driver to step on the brakes again, thus providing a user-friendly operation method.

Furthermore, since it blinks until a predetermined time elapses after the predetermined stop condition is satisfied, the driver can predict that the engine 10 will automatically stop soon. Thereby, even if the engine 10 is automatically stopped, the driver can confirm that the engine 10 has been automatically stopped by idle stop & start control, not a failure.
Further, since the light is on while the engine 10 is automatically stopped, it can be confirmed that the engine 10 is stopped by the idle stop & start control. Therefore, these can be combined to give the driver a sense of security.

  The present invention provides an idle stop & start control device that automatically stops an engine that is a power source for driving a vehicle when a predetermined stop condition is satisfied, and then automatically starts the engine when a predetermined start condition is satisfied. Applicable to vehicles equipped with.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Idle stop & start control device 3 Clutch device 4 Gear position sensor 5 Gear shift unit 7 Transmission 8 Output shaft 9 Brake pedal 10 Engine 11 Brake switch 12 Brake depression strength detection means 13 Range position detection means 14 Range change detection means 15 Accelerator sensor 16 Vehicle speed sensor 17 Shift lever 18 Accelerator pedal 20 Engine ECU
21 Engine stop control means 30 ISS-ECU
31 Engine stop condition determination means 32 Depression timer 33 Depression time determination means 34 Elapsed time timer 35 Range position determination means 36 Display control means 40 ISS indicator light 50 CAN

Claims (3)

Provided in a vehicle that automatically stops the engine of a vehicle when a predetermined stop condition is satisfied and then automatically starts the engine when a predetermined start condition is satisfied, and controls automatic stop and automatic start of the engine A possible idle stop & start control device,
A brake switch for detecting whether the foot brake is on or off;
Brake depression strength detecting means for detecting the depression strength of the foot brake;
A stepping timer for counting a stepping time exceeding the predetermined value when a detection value detected by the brake stepping strength detection unit exceeds a predetermined value set in advance;
A stepping time determining means for determining whether or not the stepping time counted by the stepping timer is equal to or longer than a predetermined time set in advance;
An elapsed time timer that counts the elapsed time since the predetermined stop condition is satisfied ,
The predetermined stop condition includes that a detection result by the brake switch is in an ON state, and the stepping time determination means includes the stepping time being equal to or longer than the specified time, and the elapsed time timer counts the predetermined time or more. Then , an idle stop & start control device that automatically stops the engine. During counting elapsed time by pre Symbol age timer, the range change detecting means for detecting the presence of the range position change of the shift lever,
Range position detection means for detecting the position of the shift lever when the vehicle stops and when the range change detection means detects that there is a change in range position;
When it is detected that there is change of the range position by the range change detecting means, the range position of when the vehicle detected is stopped by the range position detecting means in any of the D alkylene di及 beauty N range, and range position after range position change and a determining range position determining means for determining whether either the D alkylene di及 beauty N range,
By the range position determination means, range position when the vehicle is stopped is either D alkylene di及 beauty N range, and the range position after range position change in either D alkylene di及 beauty N range If it is determined that there is a range position change by the range change detection means, the engine is turned off until an elapsed time by the elapsed time timer has passed a predetermined time. 2. The idle stop & start control device according to claim 1, wherein automatic stop is not performed.   3. A display lamp that blinks until the predetermined time elapses after the predetermined stop condition is satisfied, and lights up while the engine is automatically stopped. Idle stop & start control device described in 1.

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