JPS6235038A - Throttle vale controller - Google Patents

Abstract

PURPOSE:To improve drivability by adding signals mutually of first and second multipliers for multiplying first and second desired throttle opening signals by first and second influence factors to obtain the controlling signal of a throttle valve. CONSTITUTION:A controlling means 4 reads the accelerator pedal opening from an accelerator pedal depression amount sensor 6 and determines command vehicle speed to read actual vehicle speed. Then, first and second influence factors K1, K2 are obtained from the difference between the command vehicle speed and actual one,and throttle openings phi1', phi2' are obtained by multiplying the influence factors K1, K2 by first and second desired throttle openings phi1', phi2 and added to each other to provide the output signal to an actuator 3 for driving a throttle valve 2. Thus, when the difference between the command vehicle speed and actual one is small, the accelerator pedal depression amount corresponds approximately to the vehicle speed and when large reversely the operability of the accelerator pedal in acceleration is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a throttle valve provided in an intake passage of an engine.

[Conventional technology]

Conventionally, the throttle valve installed in the intake passage of the Ennon was driven by a wire connected to the accelerator pedal.

[Problem that the invention seeks to solve]

However, such conventional direct-actuation type (mechanical link type) throttle valve control devices have problems such as poor response due to wire play and poor accelerator pedal feeling due to twisted or corroded wires.

On the other hand, a system has been proposed in which the throttle valve is driven using the accelerator pedal as an input signal, but in each of these systems, the relationship between the accelerator pedal and the throttle valve is that the throttle valve is driven according to the amount of depression of the accelerator pedal. Opening degree (1
1), and it is not possible to sufficiently improve drivability, etc.

The present invention aims to solve these problems and provides a throttle valve that improves drivability by controlling the opening degree of the throttle valve according to the depression state of the accelerator pedal! The purpose is to provide IJ # equipment.

[Means for solving problems]

Therefore, the throttle valve control device of the present invention includes a throttle valve installed in the intake passage of a vehicle engine, an actuator for driving the throttle valve and adjusting its opening degree, and an accelerator pedal (manual operation stick). ), and a control means that outputs a control signal to the actuator in response to a detection signal from the accelerator pedal depression sensor, and detects the speed of the vehicle. A J11 speed sensor is provided, and the control means outputs a command vehicle speed signal corresponding to a detection signal from the accelerator pedal depression amount sensor, and a command vehicle speed signal from the vehicle speed command means or the accelerator pedal. a first target throttle opening determination means for outputting a first target throttle opening signal according to a detection signal from the pedal depression amount sensor; a detection signal from the vehicle speed sensor; and a command vehicle speed signal from the vehicle speed command means. and a second target throttle opening determining means that outputs a second target throttle opening signal in accordance with the command acceleration signal from the acceleration command means. , determining first and second influence coefficients for multiplying the first and second target throttle opening signals from the first and second target throttle opening determination means according to the state of the vehicle; a first multiplier that multiplies the first target throttle opening signal from the first target throttle opening determination means by the first influence coefficient from the influence coefficient determining means; The second target throttle opening signal from the target throttle opening determining means of f52 is applied to the second target throttle opening signal from the influence coefficient determining means.
a multiplier of fJS2 that multiplies the influence coefficient of
and an adder capable of adding together the output signals from the 12 multipliers and outputting a throttle opening control signal to the actuator. In the throttle valve control device of the present invention described above, the first
f from the influence coefficient determining means on the target throttle opening signal of
The second target throttle opening signal corresponding to the command acceleration from the second target throttle opening determination means is multiplied by the influence coefficient of 51 and f:tS2 from the influence coefficient determination means.
The opening degree of the throttle valve is controlled according to the added value of the influence coefficient of .

〔Example〕

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
Figures f51 to f4 show a throttle valve control device as an embodiment of the present invention. Figure 1 is a schematic diagram showing its main parts, Figure 12 is a schematic diagram showing its overall configuration, and Figure 3 is its schematic diagram. 70-chart showing control procedure, FIG. 4(n),(b),
(c) is a graph for explaining the effects of the modified examples.

As shown in FIGS. 11 and 2, an intake passage 9 communicating with each combustion chamber of the vehicle engine 1 is provided, and the intake passage 9 communicating with each cylinder is connected to a surge tank 7 constituting an intake system S. The surge tank 7 is connected to the upstream intake passage 9n.

A throttle valve 2 is installed in the upstream intake passage 9a, and the throttle valve 2 is operated by an electric motor (step motor) 3 as an actuator via a pulley mechanism 11 installed in the pongee. The opening degree can be adjusted.

The electric motor 3 is wired to receive a control signal from a computer 4 as a control means, and the amount of drive by the electric motor 3 is detected by, for example, a motor position sensor (not shown) and fed back to the computer 4. It has become so.

*In addition, an air cleaner 8 is installed upstream of the throttle valve 2 in the upstream intake passage 9a, and this air cleaner 8 includes a Karman vortex air 70-sensor (not shown) and an intake air temperature sensor. (not shown) is provided.

Further, an injector (not shown) for injecting fuel is provided in the vicinity of the combustion chamber of the intake passage 9.

In this way, the intake system S includes the intake passage 9. Surge tank 7, upstream intake passage 9a, throttle valve 2. Electric motor 3. Motor position sensor, air cleaner8. It consists of a Karman vortex type 177a-sensor, an air temperature sensor and an injector.

The computer 4 also includes an accelerator pedal depression amount sensor (accelerator position sensor) 6. which detects the depression amount of the accelerator pedal 6a. An engine rotation speed sensor (not shown) that detects the engine rotation speed, a cooling water temperature sensor (not shown) that detects the cooling water temperature of the engine 1, and a vehicle speed sensor 5. An idle switch that detects that the throttle valve 2 is in the idle state, an acceleration sensor (G sensor) that detects the acceleration of the vehicle (particularly acceleration in the longitudinal direction), and the amount of depression of the brake beggle (or the amount of depression at the time of depression) They are each connected to a brake depression amount sensor that detects whether the brake pedal is depressed or not.

As shown in FIG. 11, the computer 4 as a control means receives the accelerator opening θ from the accelerator pedal depression amount sensor 6, converts the accelerator opening θ into a command vehicle speed s, and outputs a vehicle speed command. means 14, and a target throttle opening degree (hereinafter; "first
"Target throttle opening." ) fj that outputs ψ1
The target throttle opening determination means 15 of Sl receives the actual vehicle speed vR from the vehicle speed sensor 5 and the commanded vehicle speed Vs from the vehicle speed command means 14, takes the difference (VS VR) between these signals at predetermined intervals, and determines the commanded vehicle speed. and the actual vehicle speed (VsVR)
The difference between the command vehicle speed from the acceleration command means 16 and the actual vehicle speed (VS VR
) is regarded as an instruction for vehicle body acceleration (hereinafter referred to as "second target throttle opening") ψ
The difference between the command vehicle speed from the second target throttle opening determination means 17 which outputs 2 and the actual vehicle speed from the acceleration command means 1G (
VS VR) to the first and second influence coefficients,
2 for the first target throttle opening ψ1 from the output torque opening determining means 15 and 1 for the first influence coefficient from the influence coefficient determining means 18.9. W, one first multiplier and a second multiplier
a multiplier 20 of pIS2 that multiplies the second target throttle opening ψ2 from the target throttle opening determining means 17 and the second influence coefficient from the influence coefficient determining means 18 by 2; and a first multiplier 19. The first target throttle opening (output signal) ψ1′ multiplied by the influence coefficient from
and an adder 21 that adds the second target throttle opening (output signal) (p2') multiplied by the influence coefficient from , and outputs the target throttle opening ψS to the electric motor (step motor) 3. ing.

The vehicle speed command means 14 and the first target throttle opening determination means 15 constitute eleven blocks 12 corresponding to the first 70- (vehicle speed command flow).
! The degree command means 16 and the target throttle opening determination means 17 of f52 constitute the block 13 of fjs2 corresponding to the second 70- (acceleration instruction 7o-); 18 is Fuzzy
) logic, the first and second influence coefficients (a kind of weighting coefficient) on the vertical axis [membership] on the difference between the commanded vehicle speed and the actual vehicle speed (VS VR) on the horizontal axis (ratio). , a real number standardized between 0 and 1) K,
2 in step a in Figure 3.
5. As shown in alO, the functional relationship is determined by appropriate membership functions.

Note that the heavy speed command means 14. First target throttle opening determining means 15. The second target throttle opening determining means 17 and the influence coefficient determining means 18 include a memory having an output value corresponding to an appropriate input value, and an interpolation section for interpolating the output value from the memory.

Furthermore, an appropriate control device is provided that outputs a deceleration signal when the difference between the commanded vehicle speed and the actual vehicle speed (VS VR) is negative, and a description thereof will be omitted.

Note that the reference numeral 10 in the figure indicates an exhaust passage.

Since the throttle valve control device as an embodiment of the present invention is purchased as described above, as shown in FIG. Second filling (stenbu al), then command vehicle speed corresponding to accelerator opening θ■
s is determined (step a2), and then the actual vehicle speed ■R from the vehicle speed sensor 5 is read into the computer 4 serving as a control means (step a3).

In the first step 70-, the throttle operation amount (or target position) when the accelerator opening θ is regarded as a vehicle speed instruction, that is, the first target throttle opening ψ1 is calculated (step n4).

Next, the difference between the commanded vehicle speed ■s and the actual vehicle speed ■R (VsVR)
Find 1 for the influence coefficient of fjSl from (step a5),
To this first influence coefficient, and the first target throttle opening ψ
1 to find the target front throttle opening (Pl') of f51 multiplied by the influence coefficient (step a6).

Also, in the second 70-, the commanded vehicle speed ■s and the actual vehicle speed ■
8 (VS VR) (step a8), and when this difference between the commanded vehicle speed and the actual vehicle speed (VS VR) is regarded as the acceleration instruction of the vehicle body, the throttle operation plate (or target position), that is, ? The target throttle opening degree 952 of 52 is calculated (step a9).

Next, a second influence coefficient of 2 is calculated from the difference between the commanded vehicle speed and the actual vehicle speed (VS VR) (step a10), and this second influence coefficient is set to 2! Target throttle opening ψ2 of ¥S2
Then, the second target throttle opening ψ2' multiplied by the influence coefficient is determined (step a11).

Then, the output signal ψ1' obtained by multiplying the first target throttle opening ψ1 obtained in the first 7a- by 1 and the second target throttle opening obtained in the second 70- The output signal ψ2' obtained by multiplying the second influence coefficient by 2 is added to ψ2 to obtain the I] target throttle opening degree ψS (step u7).

Then, drive the throttle valve 2 so that it reaches the target throttle opening ψ5! The gI signal is output to the electric motor (step motor) 3 to drive the throttle valve 2.

At this time, a motor position sensor attached to the throttle valve 2 may perform feedback control of the throttle opening.

Since the throttle valve 2 is controlled in this way, when the value of the difference between the commanded vehicle speed and the actual vehicle speed (VS VR) is small, 1 is set as the first influence coefficient, which is the influence coefficient of the vehicle speed command flow, when the acceleration command is The influence coefficient of 12, which is the influence coefficient of flow, becomes larger than 2, that is, it becomes KICK2, and the influence of interpreting the accelerator pedal depression amount as the indicated vehicle speed becomes strong, and the difference between the commanded vehicle speed and the actual vehicle speed (Vs -VR
) is less likely to be read as commanded acceleration, making it easier to drive as the amount of accelerator pedal depression corresponds approximately to the vehicle speed.

In addition, when the value of the difference between the commanded vehicle speed and the actual vehicle speed (VS VR) is large, the first
The second influence coefficient, which is the influence coefficient of the acceleration instruction 70-, becomes smaller than 2, that is, K1 becomes 2, and the difference between the commanded vehicle speed and the actual vehicle speed (VS VR
) as the commanded acceleration becomes stronger, and the effect of replacing the accelerator pedal depression amount as the commanded vehicle speed becomes weaker, so the operability of the accelerator pedal 6a during acceleration improves.

In this way, the Tit speed request and the acceleration request can be achieved by one control means 4, and the feeling of the actual vehicle is greatly improved.

In addition, J to each block 1'2, 13 in the control means 4
11 speed sensor5. The sampling intervals of the detection signals sent from the accelerator pedal depression amount sensor 6 do not necessarily have to be the same, and by appropriately selecting the sampling times ζ for both blocks 12 and 13, the -1M feeling is improved.

Furthermore, when the brake pedal is depressed or when the commanded vehicle speed s is smaller than the actual vehicle speed V, the throttle opening is set to zero (fully closed) or is appropriately controlled to an opening according to the vehicle speed. be done.

Further, the target throttle opening determining means 15 of ff1l is as follows:
The first target throttle opening may be output in response to the accelerator opening θ.

In the above embodiment, a differentiator 22 may be provided that receives the accelerator opening degree θ from the accelerator pedal depression amount sensor 6 and outputs the accelerator opening speed (dθ/dt).
Differential 8: The accelerator opening speed (dθ/dt) from 22 is used as the input value of the D acoustic coefficient determining means 18, and the first and second
The influence coefficient of , , may be calculated as 2.

In addition to the differentiator 22 described above, a tailing controller 2 receives the accelerator opening speed (dθ/dt) from the differentiator 22 and outputs the accelerator opening speed A including tailing.
3 may be provided, and as shown in FIGS. 14(a) to 14(c), the accelerator opening speed including the tailing from the tailing controller 23 is set as the input value of the pipe coefficient determining means 18, and the In the first and second terms, the coefficients , , and , may be obtained.

Furthermore, the first and the second influence coefficient,
You can also find 2.

In addition, the influence coefficient determining means 18 may be determined by a function instead of a map (an average value calculator may be provided in place of the adder 21).

It may be determined by the accelerator pedal uplift rim in each of the above embodiments, and an average value calculator may be provided in place of the adder 21.

As the accelerator pedal and the brake pedal in each of the above embodiments, manually operated sticks may be used instead of these pedals, and in this case, sensors are attached to these sticks.

Furthermore, a differential pressure responsive Guia 7 ram may be used as the actuator.

〔Effect of the invention〕

As detailed above, the throttle valve control device of the present invention includes a throttle valve installed in the intake passage of a vehicle engine, and an actuator that drives the throttle valve to adjust its opening degree. An accelerator pedal depression amount sensor that detects the amount of depression of an accelerator pedal (a manual stick may be used), and 'ff1lf811 means that outputs a control signal to the actuator in response to a detection signal from the accelerator pedal depression sensor. A vehicle speed command means is provided with a vehicle speed sensor for detecting the speed of the vehicle, and the control means outputs a command vehicle speed signal corresponding to a detection signal from the accelerator pedal depression amount sensor;
A target throttle opening determination means of the PISl outputs a target throttle opening signal of ffH according to a command vehicle speed signal from the vehicle speed command means or a detection signal from the accelerator pedal depression amount sensor, and a detection signal from the vehicle speed sensor. and an acceleration command means for outputting a command acceleration signal corresponding to the difference between the command vehicle speed signal from the vehicle speed command means, and a second target throttle opening signal according to the command acceleration signal from the acceleration command means. a second target throttle opening determining means; and first and second target throttle opening signals for controlling the first and second target throttle opening signals from the first and second target throttle opening determining means. influence coefficient determining means for determining an influence coefficient according to the state of the vehicle; a first multiplier that calculates the influence coefficient; and a second multiplier that applies the second influence coefficient from the influence coefficient determination means to a second throttle opening signal from the second target throttle opening determination means. and an adder capable of adding each output signal from the first and second multipliers to each other and outputting a throttle opening control signal to the actuator. It has a simple structure and can provide the same effects and benefits as a dog.

(It becomes easier to operate the accelerator when driving a 1-inch Hayabusa vehicle, improving drivability and making it easier to maintain the speed of a heavy vehicle.

(2) Depending on the operating speed of the accelerator opening, it is also possible to increase the degree (weight) in which the amount of accelerator pedal depression corresponds to the acceleration of the vehicle, so that acceleration can be obtained in accordance with changes in the amount of accelerator depression. .

[Brief explanation of the drawing]

1 to 4 show a throttle valve control device as an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the other part thereof;
Fig. 2 is a schematic diagram showing its overall configuration, Fig. 3 is a 70-chart showing its control aspects, Fig. 4 (a), (b),
(C) are graphs that are only useful for explaining the effects of the modified examples. 1. Engine, 2. Throttle valve, 3. Electric motor (step motor) as actuator, 4.
Computer as control means, 5...Vehicle speed sensor, 6
・・Accelerator pedal depression amount sensor (accelerator pump a sensor), 6a・・Accelerator pedal, 7・・Surge tank, 8・・Air cleaner, 9・・Intake passage, 9a・・Upstream intake passage, 10・・Exhaust passage, 11... Pulley mechanism, 12... mi block, 13... second block, 14... J11 speed command means, 15... first Roy 7 throttle leap degree determining means, 16... acceleration command means, 17
...Second target opening degree torque opening determining means, 18...Influence coefficient determining means, 19..First multiplier, 20..Second multiplier, 21..Adder, 22.. Differentiator, 23...tailing controller, Sl...intake system. Agent Patent Attorney Yoshihiko Iinuma Figure 2 Figure 3

Claims (1)

[Claims] A throttle valve is installed in the intake passage of a vehicle engine, and includes an actuator that drives the throttle valve and adjusts its opening, an accelerator pedal depression sensor that detects the amount of depression of the accelerator pedal, and an accelerator pedal. A vehicle speed sensor is provided to detect the speed of the vehicle, the control means outputting a control signal to the actuator in response to a detection signal from the accelerator pedal depression sensor, and the control means outputs a control signal to the actuator in response to a detection signal from the accelerator pedal depression sensor. a vehicle speed command means for outputting a command vehicle speed signal corresponding to the detection signal of the vehicle speed command means, and a first target throttle opening signal responsive to the command vehicle speed signal from the vehicle speed command means or the detection signal from the accelerator pedal depression amount sensor. a first target throttle opening determination means for determining the desired throttle opening; an acceleration command means for outputting a command acceleration signal corresponding to a difference between a detection signal from the vehicle speed sensor and a command vehicle speed signal from the vehicle speed command means; a second target throttle opening determination means for outputting a second target throttle opening signal according to a command acceleration signal from the first and second target throttle opening determination means; influence coefficient determining means for determining first and second influence coefficients to be multiplied by the second target throttle opening signal according to the state of the vehicle; a first multiplier for multiplying the target throttle opening signal by a first influence coefficient from the influence coefficient determination means; and a second target throttle opening signal from the second target throttle opening determination means. a second factor multiplied by a second influence factor from the influence factor determining means;
and an adder capable of adding each output signal from the first and second multipliers to each other and outputting a throttle opening control signal to the actuator. , throttle valve control device.