JPH07113335B2 - 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 type (mechanical link type) throttle valve control device, there is a problem that the playability of the wire is deteriorated and the accelerator pedal feeling is deteriorated due to 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.

Further, if the accelerator pedal is depressed in the neutral range, the engine may swirl.

The present invention is intended to solve such a problem, and provides a throttle valve control device that controls the state of intake air in an intake system to improve exhaust gas characteristics and drivability. To aim.

[Means for solving problems]

For this reason, the throttle valve control device of the present invention includes a throttle valve interposed in the intake passage of a vehicle engine, an actuator that drives the throttle valve to adjust its opening, and detects the depression amount of the accelerator pedal. And a control means capable of outputting a control signal to the actuator in response to a detection signal from the accelerator pedal depression sensor, and a gear shift capable of detecting a neutral range state in the transmission of the engine. Of the vehicle speed command control signal and the actual vehicle speed set based on the detection signal from the accelerator pedal depression sensor when the control means is not receiving the detection signal from the transmission sensor. Means for outputting a control signal according to the comparison result to the actuator, and a detection signal from the transmission sensor And a means for outputting to the actuator a control signal corresponding to the result of comparison between the revolution speed command control signal set based on the detection signal from the accelerator pedal depression sensor and the actual engine revolution speed while receiving It is characterized by being configured.

[Action]

In the above-described throttle valve control device of the present invention, the opening degree of the throttle valve becomes the depression amount of the accelerator pedal when the shift speed is in the neutral range (N range or P range) by the control signal supplied from the control means to the actuator. The engine speed is controlled based on the engine speed, and when the gear is in the driving range (D range) other than the neutral range, the opening of the throttle valve is set to the vehicle speed set based on the accelerator pedal depression amount. Controlled to be.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a throttle valve control device as an embodiment of the present invention. FIG. 1 is a schematic diagram showing the entire structure thereof, and FIG. 2 is a flow chart thereof.

As shown in FIG. 1, an intake passage 1 communicating with each combustion chamber of a vehicle engine E having an automatic transmission 2 is provided, and the intake passage 1 communicating with each cylinder constitutes an intake system S ₁ . Surge tank (not shown)
And the surge tank communicates with the upstream intake passage 3.

A throttle valve 4 is provided in the upstream intake passage 3, and the throttle valve 4 is opened by an electric motor 5 as an actuator via a pulley mechanism 18 provided between the shafts 11 and 12. Is adjusted.

The electric motor 5 is a computer (CP
U) Wired to receive control signal from 6,
The drive amount by the electric motor 5 is determined by the motor position sensor 7
To be detected by.

Further, an air cleaner 8 is provided upstream of the throttle valve 4 in the upstream intake passage 3, and the air cleaner 8 is provided with a Karman vortex air flow sensor 9 and an intake air temperature sensor 10. .

An injector 13 for injecting fuel is provided near the combustion chamber of the intake passage 1.

As described above, the intake system S ₁ includes the intake passage 1, the surge tank, the upstream intake passage 3, the throttle valve 4, the electric motor 5, the motor position sensor 7, the air cleaner 8, the Karman vortex airflow sensor 9, and the intake air temperature sensor 10. And an injector 13.

The computer (CPU) 6 also includes an accelerator pedal depression sensor 14 for detecting the depression amount of the accelerator pedal 14a, an engine rotation speed sensor 15 for detecting the engine rotation speed, a cooling water temperature sensor 16 for detecting the cooling water temperature of the engine E, and a vehicle speed. Sensor 1
7, whether the idle switch for detecting that the throttle valve 4 is in the idle state and the gear stage are in the neutral range [neutral (N) range and parking (P) range] or the traveling range [drive (D) range, 1 [Speed range, 2nd speed range and reverse (R) range].

The computer 6 has a memory for vehicle speed Vx and a memory for engine speed Nx corresponding to the accelerator opening (accelerator pedal depression amount) x.

Reference numeral 19 in the drawing indicates a propeller shaft, and 20 indicates a schematic wheel.

Since the throttle valve control apparatus as the embodiment of the present invention is configured as described above, as shown in FIG. 2, the accelerator opening degree (according to the accelerator opening signal from the accelerator opening sensor 14 serving as the accelerator pedal depression sensor) ( It may be a throttle opening by a throttle opening sensor attached to the throttle valve 4) x and an inhibitor switch 21
The gear shift signal from the computer is read into the computer (CPU) 6 (step a1), and then the gear is in the neutral range (N range and P range) according to the gear stage signal, and the traveling range (D range, 1st speed range, 2nd speed range) And R range) is determined (step a2).

When it is determined that the vehicle is in the travel range, vehicle speed feedback control is performed as shown in steps a3 to a6.

That is, the vehicle speed Vx corresponding to the accelerator opening x is read from the memory of the computer (CPU) 6 and set as the command vehicle speed Vx (step a3), and the actual vehicle speed Vc is read from the vehicle speed sensor 17 into the computer (CPU) 6 ( In step a4), the difference between the command vehicle speed Vx and the actual vehicle speed Vc is calculated, and the actual vehicle speed V _C is the command vehicle speed.
The drive amount ΔD of the throttle valve 4 that matches Vx is obtained (step a5), and this drive amount signal is output to the electric motor 5 to drive the throttle valve 4 to an opening that provides the command vehicle speed Vx (step a6). .

In this way, the accelerator opening signal x commands the vehicle speed.

When it is determined that the engine is in the neutral range, engine speed feedback control is performed as shown in steps a7 to a9 and step a6.

That is, the engine speed Nx according to the accelerator opening x
Is read from the memory of the computer (CPU) 6 to be the command engine speed Nx (step a7), and the actual engine speed N _E is read from the engine speed sensor 15 into the computer (CPU) 6 (step a8). By taking the difference between the command engine speed Nx and the actual engine speed N _E , the drive amount ΔD of the throttle valve 4 at which the actual engine speed N _E matches the command engine speed Nx is obtained (step a9), and this drive is performed. A quantity signal is output to the electric motor 5 to drive the throttle valve 4 to an opening degree at which the command engine speed Nx is reached.

The throttle opening of the command engine speed Nx corresponding to the accelerator opening x is set to a value smaller than the throttle opening of the command vehicle speed Vx corresponding to the same accelerator opening x, for example.

Thus, the accelerator opening signal x commands the engine speed.

In addition, the present embodiment can be applied to a vehicle equipped with a manual transmission.

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 following effects and advantages can be obtained.

(1) When the transmission is in the neutral range such as when the vehicle is stopped, the accelerator opening can be made to correspond to the engine speed, which allows the accelerator opening to be slightly increased while the vehicle is stopped in the neutral range. Thus, it is possible to prevent the engine from over-rotating such that the throttle valve is fully opened, and it is possible to perform the racing operation according to the driver's preference. Further, it is possible to charge the battery while maintaining the engine at a high rotation speed and increasing the rotation speed of the generator driven by the engine to increase the amount of power generation.

(2) When the transmission is in the travel range, the accelerator opening can be made to correspond to the vehicle speed, so that a feeling of acceleration according to the accelerator depression amount can be obtained. In addition, the accelerator can be easily operated when the vehicle is traveling, and the speed can be maintained easily.

[Brief description of drawings]

1 and 2 show a throttle valve control device as an embodiment of the present invention. FIG. 1 is a schematic diagram showing the entire structure thereof, and FIG. 2 is a flow chart thereof. 1 ... Intake passage, 2 ... Automatic transmission, 3 ... Upstream intake passage, 4 ... Throttle valve, 5
...... Electric motor as actuator, 6 ... Computer (CPU) as control means, 7 ... Motor position sensor, 8 ... Air cleaner, 9 ... Karman vortex airflow sensor, 10 ... Intake air temperature sensor, 11, 12 ……
Rod, 13 Injector, 14 Accelerator position sensor as accelerator pedal depression sensor, 14a
Accelerator pedal, 15 …… Engine speed sensor, 16 ……
Cooling water temperature sensor, 17 …… Vehicle speed sensor, 18 …… Pulley mechanism, 19 …… Propeller shaft, 20 …… Wheels, 21 …… Inhibitor switch (neutral switch) as transmission sensor, E …… Engine, S ₁ … … Intake system.

Continuation of the front page (56) Reference JP-A-60-35141 (JP, A) JP-A-60-27744 (JP, A) JP-B-56-24098 (JP, B2)

Claims (1)

[Claims] 1. An actuator having a throttle valve interposed in an intake passage of an engine for a vehicle, driving the throttle valve to adjust its opening, and an accelerator pedal depression sensor for detecting the depression amount of an accelerator pedal. A control means for receiving a detection signal from the accelerator pedal depression sensor and outputting a control signal to the actuator, and a transmission sensor for detecting the neutral range state of the transmission of the engine. The control means controls the vehicle speed command control signal set based on the detection signal from the accelerator pedal depression sensor when the detection signal from the transmission sensor is not received and the actual vehicle speed according to the comparison result. Means for outputting a signal to the actuator and the accelerator pedal when receiving the detection signal from the transmission sensor. And a means for outputting to the actuator a control signal according to the result of comparison between the revolution speed command control signal set based on the detection signal from the pedal depression sensor and the actual engine revolution speed. A throttle valve control device.