JPH063151B2 - Slot valve control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control device for a throttle valve provided in an intake passage of an engine.

[Conventional technology]

Conventionally, a throttle valve provided in an intake passage of an engine is driven by a wire connected to an accelerator pedal.

[Problems to be solved by the invention]

However, in such a conventional direct coupling operation type (mechanical link type) throttle valve control device, there is a problem that the responsiveness is deteriorated due to the play of the wire, and the accelerator pedal feeling is deteriorated due to the twisting and corrosion of the wire.

On the other hand, there are also proposals for driving the throttle valve with the accelerator position as an input signal, but in both cases, the relationship between the accelerator pedal and the throttle valve is that the throttle valve opens depending on the depression amount of the accelerator pedal. Degree (1
Since it corresponds to 1), it is not possible to sufficiently improve drivability.

The present invention is intended to solve such a problem, and provides a throttle valve control device that improves drivability by controlling the opening of the throttle valve according to the depression state of the accelerator pedal. The purpose is to provide.

[Means for solving problems]

Therefore, the throttle valve control device of the present invention includes a throttle valve provided in an intake passage of an engine for a vehicle, an actuator for driving the throttle valve to adjust its opening, and an accelerator pedal (a stick for manual operation). It is also possible to detect the speed of the vehicle by means of an accelerator pedal depression amount sensor for detecting the depression amount of the vehicle) and control means for outputting a control signal to the actuator according to a detection signal from the accelerator pedal depression amount sensor. And a vehicle speed command means for outputting 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. First output of a first target throttle opening signal according to a detection signal from a depression amount sensor
Target throttle opening determining means, acceleration command means for outputting a command acceleration signal corresponding to the difference between the detection signal from the vehicle speed sensor and the command vehicle speed signal from the vehicle speed command means, and a command from the acceleration command means. Second target throttle opening degree determining means for outputting a second target throttle opening degree signal according to the acceleration signal, and first and second targets from the first and second target throttle opening degree determining means. Influence coefficient determining means for determining first and second influence coefficients for multiplying the throttle opening signal according to the state of the vehicle, and a first target throttle from the first target throttle opening determining means. A first multiplier for multiplying the opening degree signal by the first influence coefficient from the influence coefficient determining means, and a second target throttle opening degree signal from the second target throttle opening degree determining means. The second multiplier for multiplying the second influence coefficient from the influence coefficient determining means and the output signals from the first and second multipliers are added to each other to control the throttle opening of the actuator. An adder capable of outputting a signal is provided.

[Action]

In the above-described throttle valve control device of the present invention, the first target throttle opening degree determining means that corresponds to the command vehicle speed
Influences the value obtained by multiplying the target throttle opening signal by the first influence coefficient from the influence coefficient determining means, and the second target throttle opening signal corresponding to the command acceleration from the second target throttle opening determining means. The opening degree of the throttle valve is controlled according to the sum of the value obtained by multiplying the second influence coefficient from the coefficient determining means.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 4 show a throttle valve control device as one embodiment of the present invention, and FIG. 1 is a schematic diagram showing the main part thereof,
FIG. 2 is a schematic diagram showing the overall configuration, FIG. 3 is a flowchart showing the control procedure, and FIGS. 4 (a), (b), and (c) are all for explaining the operation of the modification. It is a graph.

As shown in FIGS. 1 and 2, an intake passage 9 that communicates with each combustion chamber of the vehicle engine 1 is provided, and the intake passage 9 that communicates with each cylinder has a surge tank 7 that constitutes an intake system S _1.
And the surge tank 7 communicates with the upstream intake passage 9a.

A throttle valve 2 is installed in the upstream intake passage 9a, and this throttle valve 2 is driven by an electric motor (step motor) 3 as an actuator via a pulley mechanism 11 installed on its shaft. The opening is adjusted.

The electric motor 3 is wired so as to receive a control signal from a computer 4 as a control means, and the drive amount of 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.

An air cleaner 8 is provided upstream of the throttle valve 2 in the upstream intake passage 9a. The air cleaner 8 has a Karman vortex airflow sensor (not shown) and an intake air temperature sensor (not shown). And) are provided.

An injector (not shown) for injecting fuel is provided near the combustion chamber of the intake passage 9.

As described above, the intake system S ₁ includes the intake passage 9, the surge tank 7, the upstream intake passage 9a, the throttle valve 2, the electric motor 3,
It is composed of a motor position sensor, an air cleaner 8, a Karman vortex type air flow sensor, an intake air temperature sensor and an injector.

The computer 4 also detects 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) which detects the engine rotation speed, and a cooling water temperature of the engine 1. A cooling water temperature sensor (not shown), a vehicle speed sensor 5, an idle switch for detecting that the throttle valve 2 is in an idle state, and an acceleration sensor (G sensor) for detecting the acceleration of the vehicle (in particular, the longitudinal acceleration). ), And a brake depression amount sensor for detecting the depression amount of the brake pedal (or whether the pedal is depressed or not depressed).

As shown in FIG. 1, the computer 4 as the control means receives the accelerator opening θ from the accelerator pedal depression amount sensor 6 and converts a command vehicle speed V _S from the accelerator opening θ to output a vehicle speed command. and means 14, the target throttle opening degree (hereinafter., referred to as "the first target throttle opening") when regarded accelerator position and vehicle speed indicated in response to a command vehicle speed V _S from the vehicle speed command unit 14 ₁ outputs a first target throttle opening determining means 15 for the difference of these signals by receiving the command vehicle speed V _S from the actual vehicle speed V _R and the vehicle speed command means 14 from the vehicle speed sensor 5 (V S _{-V R)} taken every predetermined time, the acceleration command means 16 which outputs as a difference between the command vehicle speed and actual vehicle speed (V S _{-V R),} the acceleration command means 1
Target throttle opening degree when the difference between the command vehicle speed and actual vehicle speed to (V S _{-V R)} were considered an indication of the vehicle body acceleration from 6 (hereinafter:. Referred to as "second target throttle opening") ₂ output a second target throttle opening determining means 17, the difference (V _S between the command vehicle speed and actual vehicle speed from the acceleration command means 16 -
First and second influence coefficient K _1, the influence coefficient determination unit 18 for outputting K ₂ receives the V _R), a first target throttle opening degree ₁ and influence from the first target throttle opening determining means 15 the first multiplier 19, a second target throttle opening degree ₂ with influence coefficient determining means from the second target throttle opening determining means 17 for multiplying the first influence coefficient K ₁ from the coefficient determining unit 18 A second multiplier 20 for multiplying the _second influence coefficient K ₂ from 18 and a first target throttle opening (output signal) multiplied by the influence coefficient from the first multiplier 19.
₁ ′ and the second target throttle opening (output signal) ₂ ′ multiplied by the influence coefficient from the second multiplier 20 are added to output the target throttle opening _S to the electric motor (step motor) 3. And an adder 21 for

The vehicle speed command means 14 and the first target throttle opening degree determination means 15 described above constitute the first block 12 corresponding to the first flow (vehicle speed instruction flow), and the acceleration command means 16 and the second block. Target throttle opening determination means 1
7 constitutes a second block 13 corresponding to the second flow (acceleration instruction flow).

Further, the influence coefficient determination means 18, the fuzzy (Fuzzy) logic, the difference (V _S between the command vehicle speed and actual vehicle speed on the horizontal axis (percentage)
In the first and second influence coefficient (one weighting factor on the vertical axis with respect to -V _R) [degree is an element (membership)], real normalized between "0-1") K _1, It is configured to output K ₂ , and the functional relationship is set to an appropriate membership function as shown in steps a5 and a10 in FIG.

The vehicle speed command means 14, the first target throttle opening degree determining means 15, the second target throttle opening degree determining means 17, and the influence coefficient determining means 18 have a memory having an output value corresponding to an input value, as appropriate. It also has an interpolator for interpolating the output value from the same memory.

Also omitted, if the difference between the command vehicle speed and actual vehicle speed (V S _{-V R)} is negative, and appropriate control device is provided which outputs a deceleration signal, the description about this.

The reference numeral 10 in the drawing indicates an exhaust passage.

Since the throttle valve control device as the embodiment of the present invention is configured as described above, as shown in FIG. 3, the accelerator opening θ from the accelerator pedal depression amount sensor 6 is read into the computer 4 as the control means. (Step a
1), then the command vehicle speed V _S corresponding to the accelerator opening θ
The determined (Step a2), then reads the actual vehicle speed V _R from the vehicle speed sensor 5 to the computer 4 as a control means (step a3).

Then, in the first flow, the throttle operation amount (or target position) when the accelerator opening θ is regarded as the vehicle speed instruction, that is, the first target throttle opening ₁ is calculated (step a4).

Then, the difference between the command vehicle speed _{V S} and the actual vehicle speed _{V R (V S} -
V _R ) to obtain the first influence coefficient K ₁ (step a5),
The first influence coefficient K ₁ and the first target throttle opening degree
₁ is multiplied by ₁ to obtain the _first target throttle opening degree ₁ ′ multiplied by the influence coefficient (step a6).

Further, in the second flow, the command vehicle speed V _S and the actual vehicle speed V _S
The difference between _R and _(V S -V _R) determined (step a8), the command vehicle speed and the throttle operation amount when the difference of _(V S -V _R) were considered acceleration instruction of the vehicle speed and the actual vehicle speed (or target Position), that is, the second target throttle opening ₂ is calculated (step a9).

Then, the command vehicle speed and calculates the difference _(V S -V _R) from the second influence coefficient _{K 2} with the actual vehicle speed (step a10), and influence coefficient _{K 2} of the second second target throttle opening degree ₂ Second target throttle opening multiplied by the influence coefficient
Request ₂ '(step a11).

Then, the first target throttle opening ₁ obtained in the first flow is multiplied by the _first influence coefficient K ₁ to obtain the output signal ₁ ′ and the second target throttle opening ₂ obtained in the second flow. by adding the second influence coefficient K ₂ output signal _squaring the _'obtains the target throttle opening _S (step a7).

Then, the drive signal is sent to the electric motor (step motor) 3 so that the throttle valve 2 reaches the target throttle opening _S.
To drive the throttle valve 2.

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

In this way, the throttle valve 2 is controlled, if the value of the difference between the command vehicle speed and actual vehicle speed (V S _{-V R)} is small, the first influence coefficient K ₁ is the influence coefficient of the vehicle speed instruction flow Becomes larger than the second influence coefficient K ₂ that is the influence coefficient of the acceleration instruction flow, that is, K ₁ > K _2, and the influence of reading the accelerator pedal depression amount as the instruction vehicle speed becomes stronger, and the command vehicle speed and the actual vehicle speed increase. the influence read as indicated acceleration difference (V S _{-V R)} with fast weakens, easily operated accelerator pedal depression amount corresponds to approximately vehicle speed.

Further, when the value of the difference between the command vehicle speed and actual vehicle speed (V S _{-V R)} is large, the first influence coefficient K ₁ is the influence coefficient of the vehicle speed instruction flow is influence coefficient of the acceleration instruction flow 2
Is smaller than the influence coefficient K _{2 of} , that is, K ₁ <K
Becomes _2, the difference between the command vehicle speed and actual vehicle speed to (V S _{-V R)} becomes strong influence be read as indicated acceleration, the influence of read as indicated vehicle speed accelerator pedal depression amount becomes weak,
The operability of the accelerator pedal 6a during acceleration is improved.

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

It should be noted that the sampling intervals of the detection signals sent from the vehicle speed sensor 5 and the accelerator pedal depression amount sensor 6 to the blocks 12 and 13 in the control means 4 do not necessarily have to be the same, and the sampling times to both blocks 12.13 are appropriate. By selecting, the feeling is further improved.

Note that when the time depresses the brake pedal or command vehicle speed V _S is smaller than the actual vehicle speed V _R is either the throttle opening is zero (fully closed), as appropriate control so that the opening corresponding to the vehicle speed To be done.

Further, the first target throttle opening degree determining means 15 may be configured to receive the accelerator opening degree θ and output the first target throttle opening degree.

In the above-described embodiment, the differentiator 22 that receives the accelerator opening θ from the accelerator pedal depression amount sensor 6 and outputs the accelerator opening speed (dθ / dt) may be provided, and the accelerator from the differentiator 22 may be provided. The first and second influence coefficients K ₁ and K ₂ may be obtained by using the opening speed (dθ / dt) as an input value of the influence coefficient determination means 13.

In addition to the differentiator 22 described above, a tailing controller 23 that receives an accelerator opening speed (dθ / dt) from the differentiator 22 and outputs an accelerator opening speed A including tailing
As shown in FIGS. 4 (a) to 4 (c), the accelerator opening speed A including tailing from the tailing controller 23 is used as an input value of the influence coefficient determining means 18 for the first and the second. The influence coefficients K ₁ and K ₂ of ₂ may be obtained.

Moreover, the difference between the command vehicle speed and actual vehicle speed (V S _{-V R),} the functional relationship between two or all any of the accelerator opening speed A containing accelerator opening speed (d [theta] / dt) and tailing , it may be calculated first and second influence coefficient K _1, K _2.

Further, the influence coefficient determination means 18 may be determined by a function instead of a map, and an average value calculator may be provided instead of the adder 21.

It may be determined by the accelerator pedal and the function in each of the above-described embodiments, and an average value calculator may be provided instead of the adder 21.

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

Further, a differential pressure responsive diaphragm may be used as the actuator.

〔The invention's effect〕

As described in detail above, according to the throttle valve control device of the present invention, the throttle valve provided in the intake passage of the vehicle engine is provided, and the actuator that drives the throttle valve to adjust the opening thereof, An accelerator pedal depression amount sensor for detecting the depression amount of the accelerator pedal (or a stick for manual operation) and a control means for outputting a control signal to the actuator in response to a detection signal from the accelerator pedal depression amount sensor are provided. , A vehicle speed sensor for detecting the speed of the vehicle 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 vehicle speed command means from the vehicle speed command means. First output of a first target throttle opening signal according to a command vehicle speed signal or a detection signal from the accelerator pedal depression amount sensor Target throttle opening determination means, acceleration command means for outputting a command acceleration signal corresponding to the difference between the detection signal from the vehicle speed sensor and the command vehicle speed signal from the vehicle speed command means, and command acceleration from the acceleration command means Second target throttle opening degree determining means for outputting a second target throttle opening degree signal according to the signal, and first and second target throttles from the first and second target throttle opening degree determining means First for multiplying the opening signal
And an influence coefficient determining means for determining a second influence coefficient according to the state of the vehicle, and a first target throttle opening degree signal from the first target throttle opening degree determining means. A first multiplier that multiplies a first influence coefficient, and a second target throttle opening signal from the second target throttle opening determining means is multiplied by a second effect coefficient from the influence coefficient determining means. And a second adder capable of adding the output signals from the first and second multipliers to each other and outputting a throttle opening control signal to the actuator. With the structure, the following effects and advantages can be obtained.

(1) The accelerator can be easily operated while the vehicle is running, the drivability is improved, and the vehicle speed can be maintained easily.

(2) Depending on the operation speed of the accelerator opening, it is possible to increase the degree (weight) that the accelerator pedal depression amount corresponds to the acceleration of the vehicle, and acceleration can be obtained according to changes in the accelerator depression amount. .

[Brief description of drawings]

1 to 4 show a throttle valve control device as one embodiment of the present invention, and FIG. 1 is a schematic diagram showing the main part thereof,
FIG. 2 is a schematic diagram showing the overall configuration, FIG. 3 is a flowchart showing the control procedure, and FIGS. 4 (a), (b), and (c) are all for explaining the operation of the modification. It is a graph. 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 pedal position sensor), 6a .. Accelerator pedal, 7 .. Surge tank, 8 .. Air cleaner, 9 .. Intake passage, 9a.
・ Upstream intake passage, 10 ・ ・ Exhaust passage, 11 ・ ・ Pulley mechanism, 12 ・ ・ First block, 13 ・ ・ Second block, 14 ・ ・ Vehicle speed command means, 15 ・ ・ First target throttle opening Degree determining means, 16 ... Acceleration commanding means, 17 ...
・ Second target throttle opening degree determining means, 18 ・ ・ Influence coefficient determining means, 19 ・ ・ First multiplier, 20 ・ ・ Second multiplier, 21 ・ ・ Adder, 22 ・ ・ Differentiator, 23 ..Tailing controller, S ₁ ... Intake system

Claims (1)

[Claims] 1. An actuator having a throttle valve interposed in an intake passage of an engine for a vehicle, an actuator for driving the throttle valve to adjust its opening, and an accelerator pedal depression amount sensor for detecting the depression amount of an accelerator pedal. And a control means for outputting a control signal to the actuator according to a detection signal from the accelerator pedal depression amount sensor,
A vehicle speed sensor for detecting the speed of the vehicle is provided, and the control means outputs a command vehicle speed signal corresponding to the detection signal from the accelerator pedal depression amount sensor, and a command from the vehicle speed command means. First according to the vehicle speed signal or the detection signal from the accelerator pedal depression amount sensor
Of the target throttle opening degree determining means for outputting the target throttle opening degree signal, and an acceleration for outputting a command acceleration signal corresponding to the difference between the detection signal from the vehicle speed sensor and the command vehicle speed signal from the vehicle speed command means. Command means, second target throttle opening degree determining means for outputting a second target throttle opening degree signal according to a command acceleration signal from the acceleration instruction means, and the first and second target throttle opening degrees described above. Influence coefficient determining means for determining first and second influence coefficients for multiplying the first and second target throttle opening signals from the determining means according to the state of the vehicle, and the first target throttle A first multiplier for multiplying a first target throttle opening signal from the opening determining means by a first influence coefficient from the influence coefficient determining means; and a second target throttle opening determining means. A second multiplier for multiplying the second target throttle opening signal from the second coefficient by the second coefficient from the coefficient determining means, and output signals from the first and second multipliers. A throttle valve control device, comprising: an adder capable of outputting a throttle opening control signal to the actuator in addition to the above.