JPS61106933A - Throttle valve control device of engine - Google Patents

Abstract

PURPOSE:To improve accelerator operability by setting opening of a throttle valve according to engine rotating number when the accelerator operating amount is maximum. CONSTITUTION:An objective intake air amount Qa is calculated based on an accelerator pedal operating amount QA detected by an accelerator pedal operating amount detecting means 12 and an engine rotating number Ne. And an objective throttle opening THO is calculated according to the calculated objective intake air amount Qa and the engine rotating number Ne. A setting means 14 sets the throttle valve opening when the accelerator pedal operating amount is maximum in accordance with the engine rotating number. Then, accelerator operability is improved.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention connects a throttle valve of an engine to an actuator that opens and closes the throttle valve, and drives this actuator in response to depression of the accelerator pedal. This invention relates to an engine throttle valve control device that electrically controls opening and closing of a throttle valve.

(Prior Art) As mentioned above, there are conventional throttle control means for electrically controlling the opening and closing of the throttle valve (for example, Japanese Patent Application Laid-Open No.
138235).

This type of throttle control means determines the opening degree of the throttle valve between fully open and fully open in any rotation range in response to the amount of depression (opening degree) of the accelerator pedal, and the determined target throttle opening is determined. For example, if output is required when the engine is rotating at low speed, the amount of intake air will be saturated when the throttle valve opens at about 60%, so the remaining 40% % minute,
Even if you operate the throttle valve, there is no change in engine output. In other words, there is no change in the output after 60% of the accelerator pedal is depressed.

Therefore, the output does not change even if the accelerator pedal is depressed from the opening at which air m is saturated to full throttle, giving the driver a sense of discomfort.Furthermore, when decelerating, the accelerator pedal must be lowered until the intake air amount is saturated. However, since the speed is not reduced, the response to accelerator operation is poor.

(Object of the Invention) The object of the present invention is to set the opening degree of the throttle valve when the accelerator pedal operation group (opening degree) is maximum according to the engine speed, and to By making the opening of the throttle valve gradually increase as the accelerator operation amount increases,
To provide a throttle valve control device for an engine capable of conveying to a driver reliable correspondence with an accelerator pedal at any output of the engine.

)・Composition (Structure of the Invention) This invention sets the throttle valve opening degree when the accelerator pedal operation amount is maximum according to the engine speed, and also sets the throttle valve opening degree for other accelerator operation amounts. The present invention is characterized in that the engine throttle valve control device is provided with a setting means for setting the opening degree of the throttle valve so that the opening degree of the throttle valve gradually increases in response to an increase in the operating amount of the accelerator.

That is, as shown in FIG. 1, the engine 10 has a throttle valve 11, and when the accelerator pedal operation amount detection means 12 detects the operation amount of the accelerator pedal, the control means 13 detects the operation ff1QA and the engine rotation. The target intake air ff1Qa is calculated based on the number No.
A target throttle angle THO is calculated based on the calculated target intake air amount Qa and engine speed Ne, and the setting means 14 sets the throttle valve opening degree when the accelerator pedal operation group is at its maximum to the engine speed. Set accordingly 8
Control means controls the throttle valve opening degree by 81 degrees per 1 operation amount of L' so that the throttle valve opening degree gradually increases in response to an increase in the accelerator operation amount. 13, and the control means 13 is an engine throttle valve control device that controls opening and closing of the throttle valve 11 at the target throttle angle THO based on the above settings.

(Effects of the Invention) According to the present invention, different amounts of intake air can be obtained in all the operating regions of the accelerator pedal at any engine speed, so there is no change in output in response to changes in the amount of depression of the accelerator pedal. This eliminates this problem, does not give the driver a sense of discomfort, and the responsiveness of the engine output to the operation of the accelerator pedal is good, improving reliability.

(Example) An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a throttle valve control device for an engine. In FIG. 2, an engine 10 has a cylinder 15 and a piston 1.
6, the combustion chamber 17 has an intake passage 18 and an exhaust passage 19.
The intake valve 2 is connected to the connection part of each passage 18.9.
0 and an exhaust valve 21 are provided, and a spark plug 22 is attached to the combustion v17.

A throttle valve 11 is disposed upstream of the intake passage 18, and a fuel injection valve 23 is disposed downstream of the throttle valve 11, and an 02 sensor 24 is disposed in the exhaust passage 19. It is connected to the passage 19 by a bypass passage 25 for exhaust gas recirculation, and an EGR valve 26 is arranged in the bypass passage 25.

An actuator 27 consisting of a forward/reverse motor is connected to the aforementioned throttle valve 11, and this actuator 2
The throttle valve 11 is driven to open and close by the forward and reverse rotation of the valve 7.

Further, the throttle valve 11 is provided with a throttle opening sensor G'j for detecting the opening of the valve 11.

The engine 10 configured as described above is controlled by an engine control unit 29, and this unit 2
9, a signal indicating the oxygen concentration of the aforementioned O2 sensor 24;
A signal indicating the throttle opening of the throttle opening sensor 28, a signal indicating the accelerator opening of the accelerator opening sensor 30,
The TDC signal from the crank angle sensor 31 is input, and based on these signals, the spark plug 22, fuel injection valve 23, EGR valve 26, and actuator 27 are controlled to drive the engine 10.

FIG. 3 shows a control circuit for controlling the actuator 27 of the throttle valve 11 included in the engine control unit 29 described above.

The CPLJ 32 controls each circuit device according to a program stored in the ROM 33, and the RAM 34 stores and reads data.

The actuator drive circuit 35 is controlled by the CPU 32 to drive the actuator 27 of the throttle valve 11 in forward and reverse directions.

Further, the throttle opening sensor 28, the accelerator opening sensor 30, and the crank angle sensor 31 are connected to the CPU 32 via an input interface 36.

The throttle valve control device configured as above J: sets the throttle valve opening degree when the accelerator pedal operation amount (accelerator opening degree) is maximum according to the engine speed, and also sets the throttle valve opening degree when the accelerator pedal operation amount (accelerator opening degree) is the maximum, and also sets the throttle valve opening degree when the accelerator pedal operation amount (accelerator opening degree) is the maximum. The throttle valve opening degree relative to the accelerator opening degree is controlled so that the throttle valve opening degree gradually increases as the accelerator operation amount increases.

The above control process will be explained below with reference to FIG.

The TDC signal input from the crank angle sensor 31 is subjected to interrupt processing every time it occurs, and in a first step 41, the TDC signal is
The period of the C signal is calculated, and in a second step 42, the engine speed Ne is calculated based on the above-mentioned period, and this engine speed NO is stored in a predetermined area of the RAM 34.

In the main routine, in an eleventh step 51, the system is initialized, and in a twelfth step 52, the target intake air ff1Qa is determined based on the signal QA indicating the accelerator opening input from the accelerator opening sensor 30 and the engine rotation speed Ne. is determined by the map of the target intake air amount Qa shown in FIG.

In this case, the accelerator opening is the throttle valve opening when the accelerator is fully open, as shown in FIG.

The output is set according to the engine rotational speed Ne, and the output for other accelerator openings is set so that the output gradually increases as the accelerator opening increases.

In a third step 53, the above-mentioned target intake air amount Qa is divided by the engine rotational speed Ne to calculate the intake air filling IR amount per revolution, that is, the target air filling amount QC.

In a fourth step 54, a target throttle angle THO is determined based on the already determined target charging amount QC and engine speed Ne using a throttle opening map shown in FIG.

Thereafter, the process returns to the second step 52 described above. □ The process of operating the actuator 27 of the throttle valve 11 described above is executed by time interrupt processing.

In a 21st step 61, a signal indicating the throttle opening from the throttle opening sensor 28 is read, and this signal is A/D converted to obtain the actual throttle angle THR. The target throttle angle TI-10 obtained in step 54 is compared with the actual throttle angle THR described above to determine the actual throttle angle TH.
If it is determined that R is large, in the 23rd step 63,
A signal instructing the actuator drive circuit 35 to rotate in the closing direction is output, and if it is determined that the target throttle angle THO is large, in a 24th step 64, a signal instructing the actuator drive circuit 35 to rotate in the opening direction is output. Output.

Then, the actuator drive circuit 35 opens and closes the throttle valve 11 based on the above-mentioned command, and controls the actual throttle angle THR to become the target throttle angle THO.

In this way, the throttle valve 11 is controlled to open and close, and the engine 10 is driven.

In the case of the above embodiment, the throttle opening when the accelerator pedal is depressed at its maximum is set according to the engine speed, and the throttle opening for other depressions is set as follows: Since the throttle valve opening is set to gradually increase, there is no play that would cause no change in output when the accelerator pedal is depressed, and responsiveness is improved.

In terms of the correspondence between the configurations of this invention and the embodiments described above, the accelerator pedal operating group detection means 12 of this invention corresponds to the accelerator opening sensor 30 of the embodiments, and the control means 13 corresponds to the accelerator opening sensor 30 of the embodiments. 12th to 14th step 5
Corresponding to processing from 1 to 54, 1,, 1Llt! gt1
4'CCPU32(7)'12Vry752, and the rest corresponds to the configuration with the same component names as in the embodiment, but the present invention is not limited to the embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, Fig. 1 is a block diagram of the present invention, Fig. 2 is a block diagram of the engine, Fig. 3 is a control circuit block diagram of the throttle valves 1 to 1, and Fig. 4 is a throttle diagram. The valve control flowchart is as follows: Fig. 5 is a map of the target intake amount, Fig. 6 is a map of the correspondence between accelerator pedal operation and output, and Fig. 7 is a map of the target throttle opening. 10... Engine 11... Throttle valve 1
2...Accelerator pedal operation detection means 13...Control means 14...Setting means 27...Actuator 28...Throttle opening sensor 29...Engine control unit 30...Accelerator opening sensor 32... CPU 35... Actuator drive circuit Fig. 4 00 () Qel OOo Oη
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Claims (1)

[Scope of Claims] 1. An accelerator pedal operation amount detection means for detecting the operation amount of the accelerator pedal, a throttle valve, and an opening degree of the throttle valve that is controlled in accordance with the detection amount of the accelerator pedal operation amount detection means. A throttle valve control device for an engine having a control means, which controls the control means by setting the throttle valve opening degree when the accelerator pedal operation amount is maximum to a different value depending on the rotation speed, and A throttle valve for an engine, characterized in that it is provided with a setting means for controlling the throttle valve opening degree in response to an accelerator pedal operation amount so that the throttle valve opening degree gradually increases in all operating regions in response to an increase in the accelerator operation amount. Control device.