JPH01110840A - Throttle operating device - Google Patents

Abstract

PURPOSE:To execute the back-up in the case when an actuator is damaged, by installing a subintake pipe into which a throttle valve operated by an accelerating pedal is installed, together with an intake pipe in which a throttle valve operated by an actuator is installed. CONSTITUTION:In the ordinary case, a controller 18 operates a main throttle valve 10 through a motor 14 on the basis of the outputs of an air flow sensor 2 and an accelerator position sensor 22. When the controller 18 detects the discordance of the control quantity of the main throttle valve 10 and the actual opening degree detected by a throttle opening degree sensor 24 and judges anomaly, a safety valve 12 is closed, and a main intake pipe is closed, and the switching to the control by a subthrottle valve 26 which is mechanically connected with an accelerating pedal 20 installed in a subintake pipe 6 is executed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a main intake pipe and a sub-intake 9t having a smaller diameter than the main intake pipe.
In a variable intake type engine with a % pipe installed in parallel,
Regarding a throttle operating device that operates a main throttle valve that opens and closes the main intake pipe through an actuator,
In particular, this prevents the vehicle from becoming unable to run or running out of control due to a failure of an actuator or the like.

<Conventional technology> In recent years, gasoline engines installed in passenger cars, etc. have been electronically controlling the fuel supply amount, ignition timing, etc. in order to ensure engine performance such as output while preventing exhaust gas pollution and improving fuel efficiency. There are many things. Conventionally, the throttle valves of carburetors and electronic fuel injection systems were opened and closed in response to the driver's will via a cable directly connected to the accelerator pedal, but auto cruise (constant speed driving) devices With the development of automatic transmissions and mechanical automatic transmissions, some have appeared that employ electronically controlled throttle operating devices driven by electric actuators such as servo motors.

In electronically controlled throttle operating devices, in addition to the amount of depression of the accelerator pedal, various data such as the clutch engagement state and intake temperature are usually processed by a micro processor, and the throttle valve is adjusted according to the vehicle's current driving conditions. The corresponding optimum opening degree has been determined. For this reason, for example, when an auto-cruise system is operating, the opening of the throttle valve is automatically adjusted to maintain the vehicle speed at the set value regardless of the load condition such as when climbing a vehicle, or when a mechanical automatic transmission is operating. When the clutch is disengaged,
It is possible to easily close the throttle valve regardless of pedal depression.

<Problems to be Solved by the Invention> Electronically controlled throttle operating devices have complex electronic control mechanisms, and are susceptible to circuit breakage due to vibrations, detour currents due to blown fuses, etc., or detour currents caused by vehicle radio, etc. Malfunction or stoppage may occur due to radio wave interference, and it is also highly conceivable that the actuator that operates the throttle valve may malfunction.

In such a case, there is a possibility that the throttle valve will not operate as instructed by the control device, and the vehicle may become unable to travel or run out of control. Various safety devices have been devised in response to such situations, but all of the conventional devices have complicated structures and have drawbacks in terms of cost.

Means for Solving the Problems> A throttle operating device according to the present invention includes a main intake pipe communicating with a combustion chamber of an engine, a main intake pipe that is provided in parallel with the main intake pipe, and opens into the combustion chamber of the engine. a sub-intake pipe having a diameter smaller than that of the main intake pipe; a sub-throttle valve provided in the sub-intake pipe that opens and closes the sub-intake pipe in accordance with the amount of depression of the accelerator pedal; A main throttle valve that opens and closes an intake pipe; an actuator connected to the main throttle valve that opens and closes the main throttle valve; The main intake pipe occluding means for occluding the inside of the main intake pipe, and a control device for controlling the operation of the main intake pipe occluding means and the actuator according to the running conditions of the vehicle.

Function> Under normal driving conditions, the control device leaves the main intake pipe blocking means open and opens and closes the sub-throttle valve linked to the accelerator pedal and the main throttle valve connected to the actuator to close the sub-intake pipe. and the degree of restriction of the main intake passage is adjusted. In this case, when driving under low load, the opening degree of the main throttle valve is set small through the 1st cutiniator to throttle the main intake pipe so that the intake air mainly passes through the auxiliary intake pipe, thereby increasing the flow velocity of the intake air and reducing the speed at low speeds. Try to increase torque.

On the other hand, if the main throttle valve does not operate according to the instructions from the control device for some reason, the main intake pipe closing means is activated to close the main intake pipe, and the intake air passes through the main intake pipe and enters the engine. Prevent air from flowing. As a result, the vehicle depends only on the opening/closing operation of the sub-throttle valve which is linked to the accelerator pedal.

Embodiment> As shown in FIG. 1, which shows the concept of an embodiment of the throttle operating device according to the present invention, main intake pipes 4 and the main intake pipes 4 are provided in parallel with each other and the main intake air v! : Sub-intake pipe 6 with a smaller diameter than 4
are both connected to an air cleaner 8 via an air flow meter 2 on the upstream side, and communicated with a combustion chamber of the engine (not shown) on the downstream side.

The main intake pipe 4 is provided with a main throttle valve 10 and a safety valve 12 in series, each of which can open and close the inside of the main intake pipe 4. The main throttle valve 10 has a motor 14 as an actuator for opening and closing the main throttle valve 10. is the main throttle valve 10
The safety valve 12 is connected to a throttle opening sensor 24 for detecting the opening of the safety valve 12, and a solenoid 16 for opening and closing the safety valve 12 is connected to the safety valve 12. A control device 18 is connected to the motor 14 and the solenoid 16, and the motor 14 and the solenoid 16 are operated by commands from the control device 18. Control device 111
8 is connected to a vehicle speed sensor, an engine rotation speed sensor, an idle switch, a crank angle sensor, an air flow sensor, an accelerator position sensor 22 that detects the amount of depression of the accelerator pedal 20, etc., which are arranged in various parts of the vehicle (not shown);
As shown in FIG. 2, which shows the control system of this embodiment, the optimum throttle opening degree is calculated based on these detected data, and the motor 14 is operated. A signal from a throttle opening sensor 24 is also input to this control device 18 . Further, the safety valve 12 is normally in an open state, and when the solenoid 16 is energized, it closes the main intake pipe 4. This solenoid 16 and the safety valve 12 constitute a main intake pipe closing means. , the motor 14 is am
This control bag W118 senses through the throttle opening sensor 24 that the device 18 does not operate according to the command, and operates when it is determined that there is a failure.

On the other hand, the sub-intake pipe 6 is rotatably provided with a sub-throttle valve 26 for opening and closing the sub-intake pipe 6. The sub-throttle valve 26 is mechanically connected to the accelerator pedal 20 via a wire 28 or the like, and its opening degree can be changed via the wire 28 in response to the amount of depression of the accelerator pedal 20. .

While the vehicle is running under low load, the motor 14 does not operate, the main intake valve 4 is closed by the main throttle fp10, and only the sub throttle valve 26 of the sub intake g16 operates to introduce intake air into the combustion chamber of the engine. let When the engine moves to high-load running and requires a large amount of intake air, the main throttle valve 10 is operated by the motor 14 to efficiently send intake air into the combustion chamber of the engine. By doing so, it is possible to improve both the engine efficiency during low-speed driving and the engine efficiency during high-speed driving, and it is possible to improve fuel efficiency and driving performance.

However, the motor 12 etc. broke down and the main throttle fp1
If the main air intake Irx4 does not operate normally and, for example, the main intake Irx4 falls into an open state, there is a risk that the vehicle will run out of control and lead to a serious accident.

Therefore, in such a case, since the throttle opening sensor 24 detects the abnormal opening/closing of the main throttle valve 10, the control bag N18 operates the solenoid 16, and the safety valve 12 controls the main intake air to 1 g! :4 is occluded. Even in this case, the sub-throttle valve 26 is connected to the accelerator pedal 2 by the wire 28.
Since it is connected to 0, it has no effect on its opening/closing operation, and even if the efficiency decreases slightly due to an increase in suction resistance, there is no problem with driving, and even if the motor 14 etc. fails, the vehicle will be able to drive itself to a safe place. It can be run.

<Effects of the Invention> According to the first machine operating device of the present invention, the main throttle valve connected to the actuator and the main intake pipe closing means are provided in series in the main intake pipe, and the main intake pipe closing means are provided in parallel in the main intake pipe. A sub-throttle valve connected to the accelerator pedal via a wire is attached to the small-diameter auxiliary intake pipe, and in the event of a failure of the actuator, etc., the main intake pipe is blocked by the main intake pipe closing means. The vehicle can be efficiently driven in both low-speed and high-load conditions, and the vehicle can be driven at least to a safe place using the auxiliary intake pipe while preventing the vehicle from running out of control.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of an embodiment of a throttle operating device according to the present invention, and FIG. 2 is a block diagram showing its control system. Further, in the figure, 2 is an air flow sensor, 4 is a main intake pipe, 6 is a sub intake pipe, 10 is a main throttle valve, 12 is a safety valve, 14 is a motor, 16 is a throttle valve, 18 is a control device, 2
0 is the accelerator pedal, 22 is the accelerator position sensor, 24
is a throttle opening sensor, 26 is a sub-throttle valve, 28
is a wire.

Claims (1)

[Claims] a main intake pipe that communicates with the combustion chamber of the engine; a sub-intake pipe that is provided in parallel with the main intake pipe and opens into the combustion chamber of the engine and has a smaller diameter than the main intake pipe; and a sub-intake pipe that is provided in the sub-intake pipe. a sub-throttle valve that opens and closes the sub-intake pipe in accordance with the amount of depression of the accelerator pedal; a main throttle valve that is provided in the main intake pipe and opens and closes the main intake pipe; and a main throttle valve that is connected to the main throttle valve. an actuator that opens and closes the main throttle valve; a main intake pipe closing means that is provided in the main intake pipe in series with the main throttle valve and that blocks the inside of the main intake pipe in the event of a failure of the actuator; A throttle operating device comprising a control device that controls the operation of the main intake pipe closing means and the actuator according to conditions.