JP2994055B2 - Ignition control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition control device for generating an ignition control signal and applying it to an ignition device arranged in a cylinder of an engine, and more particularly to a basic advance angle and a throttle valve determined from an engine speed. The ignition timing is determined from the crank angle based on the correction advance angle obtained by fuzzy inference from the opening degree of the engine and the knocking correction advance angle obtained by fuzzy inference from knocking information. To obtain a corrected ignition time, generate an ignition control signal at the corrected ignition time, and apply the generated signal to the ignition device.

[0003]

2. Description of the Related Art Conventionally, as this type of ignition control device,
An ignition control device 10 as shown in FIGS. 9A and 9B has been proposed.

The conventional ignition control apparatus 10 firstly includes a fuzzy set relating to the engine speed, a fuzzy set relating to the amount of air supplied to the combustion chamber of the engine, and oxygen in the air supplied to the combustion chamber of the engine. The engine detected by the engine speed sensor 22 based on a first fuzzy rule which is established between a fuzzy set relating to the concentration, a fuzzy set relating to the oxygen concentration in the exhaust gas, and a fuzzy set relating to the oxygen concentration in the combustion chamber of the engine. The number of revolutions of the air and the amount of air supplied to the combustion chamber of the engine detected by the air supply amount detection sensor 25 and the oxygen in the air supplied to the combustion chamber of the engine detected by the oxygen concentration detection sensor 24 The oxygen concentration is estimated according to the concentration and the oxygen concentration in the exhaust gas detected by the exhaust gas oxygen concentration detection sensor 29. The oxygen concentration in the combustion chamber of the engine was obtained by the fuzzy inference unit 36 using fuzzy inference.

[0005] The conventional ignition control device 10 then sets a fuzzy set relating to the oxygen concentration in the combustion chamber of the engine, a fuzzy set relating to the amount of fuel supplied to the combustion chamber of the engine, and a fuzzy set relating to the λ value. Based on the second fuzzy rule that is satisfied, the oxygen concentration in the combustion chamber of the engine determined by the oxygen concentration inference device 36 and the amount of fuel supplied to the combustion chamber of the engine detected by the fuel supply amount detection sensor 23A Accordingly, the λ value is obtained by the λ value inference device 37 by fuzzy inference.

[0006] The conventional ignition control device 10 further includes a λ value inference device 37 based on a third fuzzy rule established between a fuzzy set relating to the λ value, a fuzzy set relating to the engine speed, and a fuzzy set relating to the load. According to the obtained λ value and the engine speed detected by the engine speed detection sensor 22, the load applied to the engine is obtained by the load inference device 38 by fuzzy inference.

[0007] In addition, the conventional ignition control device 10 is based on a fourth fuzzy rule which is established among a fuzzy set relating to the load, a fuzzy set relating to the engine speed, a fuzzy set relating to the knocking information, and a fuzzy set relating to the advance angle. In accordance with the load determined by the load inference device 38, the engine speed detected by the engine speed detection sensor 22, and the knocking information detected by the knock detection sensor 26, the advance angle inference device 39 advances the angle by fuzzy inference. I was seeking.

[0008] Finally, the conventional ignition control device 10 converts the ignition time detected by the ignition time detection device 41 from the crank angle detected by the crank angle detection sensor 21 to the advance angle obtained by the advance angle inference device 35. The ignition control signal is generated by the ignition control signal generation device 71 at the corrected ignition time obtained by the correction according to the ignition timing, and the ignition attached to the cylinder determined by the cylinder determination device 51 from the cylinder information detected by the cylinder detection sensor 27. Was given to the device 61.

[0009]

[Problems to be Solved] However, in the conventional ignition control device 10 , the oxygen concentration in the combustion chamber of the engine is obtained by the oxygen concentration inference device 36, and the oxygen concentration in the combustion chamber of the engine obtained by the oxygen concentration inference device 36 is obtained. The lambda value is calculated by the lambda value inference device 37, the load applied to the engine is calculated by the load inference device 38 by using the lambda value determined by the lambda value inference device 37, and the load is calculated by the load inference device 38. The advanced ignition inference device 39 obtains the advance angle using the load applied to the applied engine, and the corrected ignition time obtained by correcting the ignition time determined from the crank angle by the advance angle obtained by the advance angle inference device 39 (I) fuzzy inference for obtaining the advance angle must be executed at at least four places, which has the disadvantage that it is complicated. (Ii) The execution circuit of the fuzzy inference Cumbersome There are disadvantages, and (ii
i) The fuzzy inference has the disadvantage of requiring a great deal of time, and consequently (iv) the downsizing or inexpensiveness cannot be achieved, and the immediacy of ignition control cannot be ensured.

In order to eliminate these drawbacks, the present invention provides fuzzy information from a corrected advance angle and knocking information obtained by fuzzy inference from the basic advance angle determined from the engine speed and the opening of the throttle valve. The advance angle is determined according to the knocking correction advance angle obtained by inference, the ignition time determined from the crank angle is corrected by the advance angle to obtain a corrected ignition time, and an ignition control signal is generated at the corrected ignition time. It is an object of the present invention to provide an ignition control device generated and provided to an ignition device.

[0011]

Configuration of the Invention

[0012]

[MEANS FOR SOLVING THE PROBLEMS] A means for solving the problems provided by the present invention is an ignition control device which generates an ignition control signal and gives it to an ignition device arranged in a cylinder of an engine. Detected by the number detection sensor (22),
Or, according to the engine speed calculated from the crank angle detected by the crank angle detection sensor (21) by the engine speed calculation device (22A), a basic advance angle determination device (31) for determining a basic advance angle, (b) The fuzzy set for the throttle valve opening, the fuzzy set for the oxygen concentration in the air supplied to the combustion chamber of the engine, the fuzzy set for the temperature of the engine coolant, and the fuzzy set for the correction advance angle Based on the first fuzzy rule, the throttle valve opening detected by the throttle valve opening detection sensor (23) and the air supplied to the combustion chamber of the engine detected by the oxygen concentration detection sensor (24). (32) a correction lead angle inference device for obtaining a correction lead angle by fuzzy inference according to the oxygen concentration of the knocking information. Based on a second fuzzy rule established between the fuzzy set relating to the knocking correction advance and the fuzzy set, the knocking correction advance is obtained by fuzzy inference according to the knocking information detected by the knocking detection sensor (26). A knocking correction advance inference device (33); (d) a basic advance angle determined by the basic advance angle determination device (31) and a correction advance angle and a knock correction correction advance angle obtained by the correction advance angle inference device (32). According to the knocking correction advance angle obtained by the inference device (33), the advance angle determination device (34) for determining the advance angle, and (e) the crank angle detected by the crank angle detection sensor (21) An ignition control signal is generated at a corrected ignition time obtained by correcting the ignition time detected by the ignition time detection device (41) according to the advance angle determined by the advance angle determination device (34), and the cylinder detection sensor ( An ignition control signal generating device (71) for processing the cylinder information detected by (27) by the cylinder discriminating device (51) and giving the same to an ignition device (61) attached to the determined cylinder. The ignition control device is characterized in that:

[0013]

The ignition control device according to the present invention generates an ignition control signal and supplies it to the ignition device disposed in the cylinder of the engine as specified in the above-mentioned section "Means for Solving the Problems". In particular, (a) the basic advance angle is determined according to the engine rotation speed detected by the engine rotation speed detection sensor or calculated by the engine rotation speed calculation device from the crank angle detected by the crank angle detection sensor. (B) a fuzzy set for throttle valve opening, a fuzzy set for oxygen concentration in air supplied to the combustion chamber of the engine, and a fuzzy set for engine coolant temperature. Based on a first fuzzy rule that is established between the fuzzy set relating to the angle and the fuzzy set, a scan detected by the throttle valve opening detection sensor is performed. A correction advance angle inference device for obtaining a correction advance angle by fuzzy inference according to the opening degree of the throttle valve and the oxygen concentration in the air supplied to the combustion chamber of the engine detected by the oxygen concentration detection sensor; )
Based on a second fuzzy rule established between a fuzzy set relating to knocking information and a fuzzy set relating to knocking correction advance, a knock correction correction advance angle is obtained by fuzzy inference according to knocking information detected by a knock detection sensor. A knocking correction advance inference device, and (d) a basic advance angle determined by the basic advance angle determination device, a correction advance angle obtained by the correction advance angle inference device, and a knock correction advance obtained by the knocking correction advance angle inference device. (E) an ignition time detected by the ignition time detection device from the crank angle detected by the crank angle detection sensor is determined by the advance angle determination device according to the angle. The ignition control signal is generated at the corrected ignition time obtained by correcting the angle according to the advanced angle, and the cylinder detection sensor Therefore, since there is provided an ignition control signal generator for processing the detected cylinder information by the cylinder discriminator and applying it to the ignition device attached to the cylinder determined, (i) fuzzy inference is simplified (Ii) the function of simplifying the execution circuit of fuzzy inference and (iii) the function of speeding up fuzzy inference, resulting in (vi) miniaturization or inexpensiveness, and fuel injection. It acts to ensure the immediateness of control.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of an ignition control device according to the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments described below are:
It is described for the purpose of facilitating or facilitating the understanding of the present invention and is not described for limiting the present invention.

In other words, each element disclosed in the embodiments described below includes all design changes and equivalent replacements that fall within the spirit and scope of the present invention.

(Attached drawing)

FIGS. 1A and 1B are block circuit diagrams showing a first embodiment of the ignition control device according to the present invention.

FIG. 2 is a sectional view of the first embodiment shown in FIGS. 1A and 1B.
7 is a graph for explaining the operation of the embodiment, and particularly shows an example of a conversion graph for determining the basic advance angle from the engine speed by the basic advance angle determination device 31. FIG.

FIGS. 3A and 3B correspond to FIGS. 1A and 1B, respectively.
6B is a graph for explaining the operation of the first embodiment shown in FIG. 6B, and particularly shows an example of a fuzzy set used in fuzzy inference in the correction lead angle inference device 32 and the knocking correction lead angle inference device 33. ing.

FIGS. 4A to 4I correspond to FIGS.
6B is a graph for explaining the operation of the first embodiment shown in FIG. 6B, and particularly shows an example of fuzzy inference in the correction lead angle inference device 32.

FIGS. 5A to 5C correspond to FIGS.
6B is a graph for explaining the operation of the first embodiment shown in FIG. 6B, and particularly shows an example of fuzzy inference in the knocking correction advance angle inference device 33.

FIGS. 6A and 6B are block circuit diagrams showing a second embodiment of the ignition control device according to the present invention.

FIGS. 7A and 7B are block circuit diagrams showing a third embodiment of the ignition control device according to the present invention.

FIGS. 8A and 8B are block circuit diagrams showing a fourth embodiment of the ignition control device according to the present invention.

(Configuration of First Embodiment)

First, referring to FIGS. 1A and 1B,
About the first embodiment of the ignition control device according to the present invention,
The configuration will be described in detail.

Reference numeral 10 denotes an ignition control device according to the present invention, which includes a crank angle detection sensor 21 for detecting a crank angle, and a rotation speed of the engine output shaft per unit time.
(Referred to as "engine speed"), a throttle valve opening sensor 23 for detecting the opening of the throttle valve, and a carburetor and, consequently, a combustion chamber of the engine. An oxygen concentration detection sensor 24 for detecting the oxygen concentration in the given air (also simply referred to as “oxygen concentration”), and an engine cooling water temperature detection sensor 25 for detecting the temperature of the engine cooling water.
A knocking detection sensor 26 for detecting knocking (that is, abnormal combustion of fuel in the combustion chamber of the engine), and a knocking sensor 26 disposed at a predetermined position (for example, the top dead center position) of the cylinder, and the piston reaches the predetermined position. (That is, cylinder information). Knocking detection sensor 26 outputs a result obtained by integrating a high-frequency signal generated by knocking as knocking information (here, information on an impact accompanying abnormal combustion of fuel in the combustion chamber of the engine).

The ignition control device 10 according to the present invention
It is connected to the engine speed detection sensor 22 and includes a basic advance angle determination device 31 for determining a basic advance angle from the detection result of the engine speed supplied from the engine speed detection sensor 22.

The ignition control device 10 according to the present invention further comprises:
The throttle valve opening detection sensor 23, the oxygen concentration detection sensor 24, and the engine coolant temperature detection sensor 25 are connected to the throttle valve opening detection sensor 23, the throttle valve opening detection result given from the throttle valve opening detection sensor 22, and the oxygen concentration. A correction lead angle inference device for obtaining a correction lead angle by fuzzy inference from a detection result of the oxygen concentration given from the detection sensor 24 and a detection result of the temperature of the engine coolant given from the engine coolant temperature detection sensor 25 It has 32.

The ignition control device 10 according to the present invention is further connected to a knocking detection sensor 26, and obtains a knocking correction advance angle by fuzzy inference from a detection result of knocking information given from the knocking detection sensor 26. Knocking correction advancing inference device 33 is provided.

The ignition control device 10 according to the present invention is additionally connected to a basic advance angle determining device 31, a correction advance angle inference device 32, and a knocking correction advance angle inference device 33. From the determination result of the basic advance angle given from 31, the inference result of the correction advance angle given from the correction advance inference device 32, and the inference result of the knocking correction advance angle given from the knocking correction advance inference device 33, An advance angle determination device 34 for determining an advance angle is provided.

The ignition control device 10 according to the present invention is also connected to the crank angle detection sensor 21, and determines the time to ignite (“ignition time”) based on the crank angle detection result given from the crank angle detection sensor 21. And an ignition time detection device 41 for detecting a cylinder discrimination signal which is connected to the cylinder detection sensor 27 and processes the cylinder information detected by the cylinder detection sensor 27 to determine a cylinder in a state to be ignited. A cylinder discriminating device 51 for outputting as a signal, an ignition time detecting device 41, a cylinder discriminating device 51, and an ignition time detecting device connected to the lead angle determining device 34 and detecting the ignition time in accordance with the lead angle given from the lead angle determining device 34. An ignition control signal generation device for correcting the ignition time given from the device 41, generating an ignition control signal at the corrected ignition time, and giving the signal to the ignition device 61 attached to the cylinder determined by the cylinder determination device 51. And a 71.

(Operation of the First Embodiment)

Further, referring to FIGS. 1A to 5C,
About the first embodiment of the ignition control device according to the present invention,
The operation will be described in detail.

Basic advance angle determination device 31, corrected advance angle inference device 3
2. Since generalization of the operation of the knocking correction advance inference device 33 and the like involves a lot of complexity, here, the detection result of the engine speed given from the engine speed detection sensor 22 and The throttle valve opening detection result given from the throttle valve opening detection sensor 23, the oxygen concentration detection result given from the oxygen concentration detection sensor 24, and the engine cooling water given from the engine cooling water temperature detection sensor 25. The temperature detection result and the detection result of the knocking information given from the knocking detection sensor 25 will be exemplarily described with reference to the case shown in Table 1.

[0037]

[Table 1]

Determination of basic advance angle

The basic advance angle is determined in the basic advance angle determination device 31 as follows.

That is, the basic advance angle determination device 31 responds to the detection result (here, 2000 times / minute) of the engine speed given from the engine speed detection sensor 22, for example, as shown in FIG.
The basic advance angle is determined based on the conversion graph shown in FIG. Here, the basic advance angle corresponding to the engine speed of 2000 revolutions / minute is determined to be 15 degrees.

Inference of Correction Lead Angle

The correction advance angle is obtained by fuzzy inference in the correction advance inference device 32 as follows.

That is, the correction lead angle inference device 32 uses a fuzzy set (for example, FIG.
A (a) fuzzy set A), a fuzzy set relating to the oxygen concentration in the air supplied to the combustion chamber of the engine (for example, fuzzy set B in FIG. 3A (b)) and a fuzzy set relating to the temperature of the engine coolant (for example, fuzzy set relating to the correction advance fuzzy set C) of FIG. 3A (c) (e.g. FIG. 3A (d) fuzzy rule f ₁ ~f shown in fuzzy rule (e.g. Table 2 that holds between the fuzzy set D) of
₈ ) Based on the throttle valve opening detection result given from the throttle valve opening detection sensor 23 and the oxygen concentration in the air supplied to the combustion chamber of the engine given from the oxygen concentration detection sensor 24 Based on the result and the detection result of the temperature of the engine cooling water provided from the engine cooling water temperature detection sensor 25, a correction advance angle is obtained by fuzzy inference. Hereinafter, the fuzzy inference in the correction lead angle inference device 31 is based on the fuzzy rules f _{1 to} f ₈ shown in Table 2 which are established between the fuzzy sets A to D shown in FIGS. 3A (a) to 3 (d). It will be described as an example to be executed. Therefore, in the present invention, if desired, (i) fuzzy sets A to D
May be increased or decreased or the shape of the membership function may be changed, and (ii) fuzzy rules f _{1 to} f
You may increase or decrease the number of ₈ or change the content.

[0044]

[Table 2]

The correction lead angle inference device 32 uses the fuzzy rule f ₁
First, (i) a membership function S _A included in the fuzzy set A shown in FIG. 3A (a) is selected based on Table 2, and then (ii) a membership function corresponding to the opening of the throttle valve. The function value S _A1 of the function S _A is obtained as shown in FIG. 4A (a ₁ ). The corrected advancing inference device 32 uses the fuzzy set D shown in FIG. 3A (d) at the height position S _A1 corresponding to the function value S _A1 of the membership function S _A corresponding to the throttle valve opening of 40%. It belongs to the membership function ZR _D
Cut, and creates a membership function ZR _D ^{* 1} of ladder shape as shown in 4A (a _2).

The correction lead angle inference device 32 uses the fuzzy rule f ₂
First, (i) a membership function M _A included in the fuzzy set A shown in FIG. 3A (a) is selected based on Table 2, and then (ii) a membership function corresponding to the opening of the throttle valve. The function value S _A1 of the function M _A is obtained as shown in FIG. 4B (b ₁ ). The corrected advancing inference device 32 generates a fuzzy set D shown in FIG. 3A (d) at a height position M _A2 corresponding to a function value M _A2 of a membership function M _A corresponding to a throttle valve opening of 40%. Membership function NS _D to which it belongs
Is cut to create a trapezoidal membership function NS _D ^{* 2} as shown in FIG. 4B (b ₂ ).

The correction lead angle inference device 32 uses the fuzzy rule f ₃
First, based on (i) Table 2, the membership function NS _B included in the fuzzy set B shown in FIG.
Then, (ii) a function value NS _B3 of the membership function NS _B corresponding to the oxygen concentration of 5% is obtained as shown in FIG. 4C (c ₁ ). The corrected lead angle inference device 32 determines whether the membership belonging to the fuzzy set D shown in FIG. 3A (d) at the height position NS _B3 corresponding to the function value NS _B3 of the membership function NS _B corresponding to the oxygen concentration of 5%. cutting the function PS _D, creating a membership function PS _D ^{* 3} in FIG. 4C (c ₂₎ a ladder shape (0 height in this case) as shown in.

The correction lead angle inference device 32 uses the fuzzy rule f ₄
First, based on (i) Table 2, the membership function ZR _B included in the fuzzy set B shown in FIG.
Elected, then (ii) oxygen membership functions ZR function value ZR _B4 of _B corresponding to the concentration of 5% determined as shown in FIG. 4D (d _1). Correction advance inference apparatus 32 is a membership function ZR height position ZR _B4 corresponding to the function value ZR _B4 of _B corresponding to the oxygen concentration of 5% membership belonging to fuzzy set D shown in FIG. 3A (d) The function ZR _D is cut, and a trapezoidal membership function Z is obtained as shown in FIG. 4D (d ₂ ).
Create R _D ^{* 4} .

The correction lead angle inference device 32 uses the fuzzy rule f ₅
First, (i) based on Table 2, the membership function PS _B included in the fuzzy set B shown in FIG.
Then, (ii) a function value PS _B5 of the membership function PS _B corresponding to the oxygen concentration of 5% is obtained as shown in FIG. 4E (e ₁ ). The corrected lead angle inference device 32 determines that the membership belonging to the fuzzy set D shown in FIG. 3A (d) at the height position PS _B5 corresponding to the function value PS _B5 of the membership function PS _B corresponding to the oxygen concentration of 5%. cutting the function NS _D, membership functions ladder shape as shown in FIG. 4E (e ₂₎ N
Create _SD ^{* 5} .

The correction lead angle inference device 32 uses the fuzzy rule f ₆
First, (i) a membership function Z _C included in the fuzzy set C shown in FIG. 3A (c) is selected based on Table 2, and (ii) a member corresponding to the engine cooling water temperature 40 ° C. The function value Z _C6 of the ship function Z _C is obtained as shown in FIG. 4F (f ₁ ). The correction lead angle inference device 32 belongs to the fuzzy set D shown in FIG. 3A (d) at a height position ZR _C6 corresponding to the function value Z _C6 of the membership function Z _C corresponding to the engine cooling water temperature of 40 ° C. membership function PS _D is cut, creating a membership function PS _D ^{* 6} of ladder shape as shown in FIG. 4F (f _2).

The correction lead angle inference device 32 uses the fuzzy rule f ₇
Respect, based on the first (i) Table 2, elected membership functions S _C contained in the fuzzy set C shown in FIG. 3A (c), then (ii) corresponding to the engine coolant temperature 40 ° C. Members The function value S _C7 of the ship function S _C is obtained as shown in FIG. 4G (g ₁ ). The correction lead angle inference device 32 belongs to the fuzzy set D shown in FIG. 3A (d) at a height position S _C7 corresponding to the function value S _C7 of the membership function S _C corresponding to the engine cooling water temperature of 40 ° C. membership functions ZR _D is cut, creating membership functions ZR _D ^{* 7} of ladder shape as shown in FIG. 4G (g _2).

The correction lead angle inference device 32 uses the fuzzy rule f ₈
Respect, based on the first (i) Table 2, elected membership functions M _C that are included in the fuzzy set C shown in FIG. 3A (c), then (ii) corresponding to the engine coolant temperature 40 ° C. Members The function value M _C8 of the ship function M _C is obtained as shown in FIG. 4H (h ₁ ). The correction lead angle inference device 32 belongs to the fuzzy set D shown in FIG. 3A (d) at a height position M _C8 corresponding to the function value M _C8 of the membership function M _C corresponding to the engine coolant temperature of 40 ° C. membership functions ZR _D is cut, creating membership functions ZR _D ^{* 8} of ladder shape as shown in FIG. 4H (h _2).

[0053] Correction advance inference device 32, membership function ZR _D created by the above ^{_{* 1, NS D * 2,}} PS D * 3, ZR D * 4, N
^{_{S D * 5, PS D *}} 6, ZS D * 7, ZR D * 8 for enclosed hatched area in calculating the center of gravity as shown in FIG. 4I (i), the correction advance the abscissa -2.59 ° Infer that.

Inference of knocking correction advance angle

The knocking correction advance angle is obtained by fuzzy inference in the knocking correction advance angle inference device 33 as follows.

That is, the knocking correction advance inference device 33
Is a fuzzy set (for example, a fuzzy set E in FIG. 3B (e)) related to knocking information and a fuzzy set (for example, a fuzzy set F in FIG. 3B (f)) related to knock correction advance. Based on the fuzzy rules g ₁ , g ₂ ) shown in FIG. 3, the knocking correction advance angle is obtained by fuzzy inference according to the detection result of the knocking information given from the knocking detection sensor 26.
Hereinafter, the fuzzy inference in the knocking correction advance inference device 33 is based on the fuzzy rules g ₁ and g ₂ shown in Table 3 which are established between the fuzzy sets E and F shown in FIGS. 3B (e) and 3 (f). It will be described as an example to be executed. Therefore, in the present invention, (i) the membership function included in the fuzzy sets E and F may be increased or decreased, or the shape thereof may be changed, and (ii) the number of fuzzy rules g ₁ and g ₂ may be changed. May be increased or decreased, or the content thereof may be changed.

[0057]

[Table 3]

[0058] knocking correction advance inference apparatus 33 relates to the fuzzy rules g _1, first (i) Based on Table 3, Fig. 3B (e)
The membership function S _E included in the fuzzy set E shown in FIG. 5 is selected, and then (ii) the function value S _E1 of the membership function S _E corresponding to the knocking information 2V is calculated as shown in FIG.
Obtain as shown in ₁ ). Knocking correction lead angle inference device
Reference numeral 33 denotes a height position S _E1 corresponding to the function value S _E1 of the membership function S _E corresponding to the knocking information 2V.
membership functions ZR _F was cut belonging to fuzzy set F shown (f), the creating membership functions ZR _F ^{* 1} in ladder shape as shown in FIG. 5A (a _2).

[0059] knocking correction advance inference apparatus 33 relates to the fuzzy rules g _2, first (i) Based on Table 3, Fig. 3B (e)
The membership function M _E included in the fuzzy set E shown in FIG. 5 is selected, and then (ii) the function value M _E2 of the membership function M _E corresponding to the knocking information 2V is calculated as shown in FIG.
Obtain as shown in ₁ ). Knocking correction lead angle inference device
33 is a height position M _E2 corresponding to the function value M _E2 of the membership function M _E corresponding to the knocking information 2V.
cutting the membership function PM _F belonging to the fuzzy set F shown (f), the creating membership functions PM _F ^{* 2} of ladder shape as shown in FIG. 5B (b _2).

[0060] knocking correction advance inference apparatus 33 calculates the membership functions ZR _F ^{* 1,} PM _F ^* centroid as shown ² for enclosed hatched area in FIG. 5C (c) created by the above, the The abscissa 7.5 degrees is inferred as the knock correction advance angle.

Determination of advance angle

The advance angle is determined by the advance angle determination device 34 as follows.

That is, the lead angle determining device 34 determines the basic lead angle determined from the basic lead angle determining device 31, the corrected lead angle inferred result supplied from the corrected lead angle inferring device 32, and the knocking correction lead angle. From the inference result of the knocking correction advance angle provided from the inference device 33, the advance angle is appropriately determined.

The advance angle determining device 34 adds, for example, the result of determining the basic advance angle provided from the basic advance angle determining device 31 and the result of inferring the corrected advance angle provided from the corrected advanced angle inference device 32. The lead angle is determined by subtracting the inference result of the knock correction lead angle given from the knock correction lead angle inference device 33 from the result. In the above case, the lead angle is 4.
It will be 91 degrees.

Generation of a cylinder discrimination signal

The cylinder discriminating device 51 discriminates a cylinder in a state to be ignited by processing a detection result (ie, cylinder information) given from the cylinder detection sensor 27 and outputs the cylinder as a cylinder discrimination signal.

The cylinder discrimination signal is, for example, a signal which becomes a high level state when the cylinder is in a state to be ignited.
It is generated for each cylinder.

Generation of ignition control signal

The ignition control signal is supplied to an ignition control signal generator 71.
Is generated as described below and given to the ignition device 61.

That is, the ignition control signal generation device 71 determines the ignition time detected by the ignition time detection device 41 from the crank angle detected by the crank angle detection sensor 21 and determines the advance angle given from the advance angle determination device 34. Correct according to
(In the above case, the ignition time is corrected to “delay the ignition time by the time corresponding to the lead angle of 4.91 degrees”), and the corrected ignition time
(I.e., the corrected ignition time), an ignition control signal is generated, and the cylinder information detected by the cylinder detection sensor 27 is transmitted to the cylinder discrimination device 51.
Is given to the ignition device 61 attached to the cylinder determined by the processing.

(Second Embodiment)

In addition, the configuration and operation of the second embodiment of the ignition control device according to the present invention will be described in detail with reference to FIGS. 6A and 6B.

In the second embodiment, the engine speed detecting sensor 22 is replaced by an engine speed calculating device 22A, and the input terminal of the engine speed calculating device 22A is connected to the output terminal of the crank angle detecting sensor 21. The configuration is substantially the same as that of the first embodiment, except that the engine speed is calculated from the detection result of the crank angle provided from the crank angle detection sensor 21.

In other words, the second embodiment has substantially the same operation and effect as the first embodiment, except that the number of sensors provided for the engine can be reduced.

Therefore, for simplicity of description, elements corresponding to elements included in the first embodiment are denoted by the same reference numerals as in the first embodiment, and other elements are denoted by the same reference numerals. Detailed description is omitted.

(Third Embodiment)

The configuration and operation of the third embodiment of the ignition control device according to the present invention will be described in detail with reference to FIGS. 7A and 7B.

In the third embodiment, the cylinder detection sensor 27 is eliminated, and the input end of the cylinder discriminating device 51 is connected to the output end of the crank angle detection sensor 21. The configuration is substantially the same as that of the first embodiment except that the operating state of the cylinder is determined from the detected crank angle detection result.

In other words, the third embodiment has substantially the same operation and effect as the first embodiment, except that the number of sensors provided for the engine can be reduced.

Therefore, for simplicity of description, elements corresponding to those included in the first embodiment are denoted by the same reference numerals as in the first embodiment, and other elements are denoted by the same reference numerals. Detailed description is omitted.

(Fourth Embodiment)

The configuration and operation of a fourth embodiment of the ignition control device according to the present invention will be described in detail with reference to FIGS. 8A and 8B.

In the fourth embodiment, the cylinder detection sensor 27 is eliminated, and the input end of the cylinder discriminating device 51 is connected to the output end of the crank angle detection sensor 21. It has substantially the same configuration as the second embodiment except that the operating state of the cylinder is determined from the detected crank angle detection result.

In other words, the fourth embodiment has substantially the same operation and effect as the second embodiment, except that the number of sensors provided for the engine can be reduced.

Therefore, for simplicity of description, elements corresponding to those included in the second embodiment are given the same reference numerals as in the second embodiment, and other elements are designated by the same reference numerals. Detailed description is omitted.

(Modification)

In the above description, the fuzzy inference is performed by cutting off the top of the membership function to find the center of gravity. However, the present invention is not limited to this, and may be implemented in another well-known manner. It also covers cases where fuzzy inference is performed (eg, by changing the height of the membership function to find the center of gravity). In other words, the present invention does not limit fuzzy inference to a certain one.

[0088]

As is apparent from the above description, the ignition control device according to the present invention generates an ignition control signal and arranges it in the cylinder of the engine as specified in the section of "Solution to Problem" described above. An ignition control device to be provided to the ignited ignition device, particularly, (a) an engine speed detected by an engine speed detection sensor or calculated from a crank angle detected by a crank angle detection sensor by an engine speed calculation device. (B) a fuzzy set relating to the throttle valve opening, a fuzzy set relating to the oxygen concentration in the air supplied to the combustion chamber of the engine, and the engine cooling. Based on a first fuzzy rule that is established between a fuzzy set for water temperature and a fuzzy set for correction advance,
A correction advance angle is obtained by fuzzy inference according to the throttle valve opening detected by the throttle valve opening detection sensor and the oxygen concentration in the air supplied to the combustion chamber of the engine detected by the oxygen concentration detection sensor. Advancing inference device for (c) based on a second fuzzy rule which is established between a fuzzy set for knocking information and a fuzzy set for knocking correction advancement,
A knocking correction advance angle inference device for obtaining a knock correction advance angle by fuzzy inference according to the knocking information detected by the knocking detection sensor, and (d) a basic advance angle and a correction advance angle determined by the basic advance angle determination device. A lead angle determining device for determining a lead angle in accordance with the correction lead angle obtained by the inference device and the knock correction lead angle obtained by the knock correction lead angle inference device; and (e) detection by the crank angle detection sensor. An ignition control signal is generated at a corrected ignition time obtained by correcting the ignition time detected by the ignition time detection device from the set crank angle according to the advance angle determined by the advance angle determination device, and is detected by the cylinder detection sensor. Control signal for providing the determined cylinder information to the ignition device attached to the cylinder determined by processing by the cylinder determination device Since it has a live device, it has the effect of (i) simplifying fuzzy inference, and (ii) the effect of simplifying the execution circuit of fuzzy inference, and (iii) the effect of accelerating fuzzy inference. As a result, (iv) downsizing or inexpensiveness can be achieved, and the immediacy of fuel injection control can be ensured.

[Brief description of the drawings]

FIG. 1A is a block circuit diagram showing a part of a first embodiment of an ignition control device according to the present invention.

FIG. 1B is a block circuit diagram showing the rest of the first embodiment of the ignition control device according to the present invention.

FIG. 2 is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 3A is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 3B is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4A is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4B is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4C is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4D is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4E is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4F is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4G is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4H is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 4I is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 5A is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 5B is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 5C is a graph for explaining the operation of the first embodiment shown in FIGS. 1A and 1B.

FIG. 6A is a circuit diagram showing a part of a second embodiment of the ignition control device according to the present invention.

FIG. 6B is a circuit diagram showing the rest of the second embodiment of the ignition control device according to the present invention.

FIG. 7A is a circuit diagram showing a part of a third embodiment of the ignition control device according to the present invention.

FIG. 7B is a circuit diagram showing the rest of the third embodiment of the ignition control device according to the present invention.

FIG. 8A is a circuit diagram showing a part of a fourth embodiment of the ignition control device according to the present invention.

FIG. 8B is a circuit diagram showing the rest of the fourth embodiment of the ignition control device according to the present invention.

FIG. 9A is a block circuit diagram showing a part of a conventional example.

FIG. 9B is a block circuit diagram showing the rest of the conventional example.

[Explanation of Signs] 10 ... Ignition control device 21 ... Crank angle detection sensor 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Engine speed detection sensor 22A ・ ・ ・ ・ ・ ・ ・ ・ ・Engine speed calculation unit 23 Throttle valve opening detection sensor 24・ ・ ・ Oxygen concentration detection sensor 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ Engine cooling water temperature detection sensor 26 ・ ・ ・ ・ ・ ・ ・ ・ ・Knocking detection sensor 27 Cylinder detection sensor 31 ... Basic advance angle determination device 32・ ・ ・ ・ ・ ・ ・ Corrected lead angle inference device 33・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Advance angle determination device 41 ・ ・ ・ ・ ・ ・ ・ ・ ・ Ignition time detection device 51 ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylinder identification device 61 ・ ・ ・ ・ ・ ・ ・ ・ ・ Ignition device 71 ・ ・ ・ ・ ・ ・ ・..... Ignition control signal generator

Continuation of the front page (56) References JP-A-61-294169 (JP, A) JP-A-2-188676 (JP, A) JP-A-2-271040 (JP, A) JP-A-1-113574 (JP) , a) JP flat 2-11849 (JP, a) fuzzy logic and neural network International conference Proceedings 1990. 7.22 to 24, especially from 929 to 938 pages references to (58) investigated the field (Int.Cl. ⁶ , DB name) F02P 5/15

Claims (1)

(57) [Claims] An ignition control device for generating an ignition control signal and applying it to an ignition device arranged in a cylinder of an engine, comprising: (a) an engine speed detection sensor (22)
Or, according to the engine speed calculated from the crank angle detected by the crank angle detection sensor (21) by the engine speed calculation device (22A), a basic advance angle determination device (31) for determining a basic advance angle, (b) The fuzzy set for the throttle valve opening, the fuzzy set for the oxygen concentration in the air supplied to the combustion chamber of the engine, the fuzzy set for the temperature of the engine coolant, and the fuzzy set for the correction advance angle Based on the first fuzzy rule, the throttle valve opening detected by the throttle valve opening detection sensor (23) and the air supplied to the combustion chamber of the engine detected by the oxygen concentration detection sensor (24). (32) a correction lead angle inference device for obtaining a correction lead angle by fuzzy inference according to the oxygen concentration of the knocking information. Based on a second fuzzy rule established between the fuzzy set relating to the knocking correction advance and the fuzzy set, the knocking correction advance is obtained by fuzzy inference according to the knocking information detected by the knocking detection sensor (26). A knocking correction advance inference device (33); (d) a basic advance angle determined by the basic advance angle determination device (31) and a correction advance angle and a knock correction correction advance angle obtained by the correction advance angle inference device (32). According to the knocking correction advance angle obtained by the inference device (33), the advance angle determination device (34) for determining the advance angle, and (e) the crank angle detected by the crank angle detection sensor (21) An ignition control signal is generated at a corrected ignition time obtained by correcting the ignition time detected by the ignition time detection device (41) according to the advance angle determined by the advance angle determination device (34), and the cylinder detection sensor ( An ignition control signal generating device (71) for processing the cylinder information detected by (27) by the cylinder discriminating device (51) and giving the same to an ignition device (61) attached to the determined cylinder. An ignition control device characterized by the above-mentioned.