JPS6079127A - Throttle valve control device in internal-combustion engine - Google Patents

Abstract

PURPOSE:To enhance the durability, safety and driving characteristic of a vehicle, by releasing the control of a throttle valve under operation by an accelerator pedal when the rotational speed of an engine corresponding to the depressing amount of the accelerator exceeds an allowable maximum rotational speed, in order to lower the rotational speed of the engine below the allowable value. CONSTITUTION:A motor 7 is controlled by means of an electric control circuit 7 so that a throttle valve 1 in an internal-combustion engine is controlled to be opened and closed by the rotational output of the motor 2 through a torque transmission device 3. There are provided an accelerator sensor 5 for issuing output signals corresponding to the depressing amount of the accelerator pedal 4 and an engine rotational speed sensor 6 so that the outputs of these sensors are delivered to the electric control circuit 7. This control circuit 7 controls the motor 2 in accordance with the output signal of the accelerator sensor 5, and as well, if an actual rotational speed detected by the rotational speed sensor 6 exceeds a predetermined allowable maximum rotational speed, the control of the throttle valve by the accelerator pedal 4 is released to restrain the rotational speed of the engine below the allowable maximum rotational speed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a throttle valve control device for electrically driving and controlling a throttle valve of an internal combustion engine.

(Prior art) Conventionally, a throttle valve control device for an internal combustion engine transmits the actuation of the accelerator pedal to the throttle V-bar (through a throttle cable or link mechanism, etc.), and directly controls the throttle valve Since the engine was under control, the driver could freely change the engine speed of the internal combustion engine or the speed of the vehicle at will, and therefore the driver could control the internal combustion engine's engine speed or the speed of the vehicle at will. ~a o o o o r, it can be easily operated even in a range exceeding Rm, and the maximum speed of stable running allowed by 4 vehicles when driving in a straight line, for example 120 to 130
By increasing the vehicle speed to a range exceeding Km/H!
The drawback was that stones could accumulate, causing greater damage to the engine and impairing driving safety.

(Object of the Invention) The present invention provides for reducing the engine speed when the engine speed corresponding to the acceleration exceeds an appropriate value determined by, for example, the durability, safety, driving characteristics, etc. of a vehicle including an internal combustion engine. The purpose of the present invention is to improve the durability, safety, driving characteristics, etc. of a vehicle by providing a throttle valve control device for an internal combustion engine that controls the rotation speed to an appropriate rotation speed that is lower than the rotation speed corresponding to the amount of depression of the accelerator pedal μ.

(Structure of the Invention) As shown in FIG. 1, the first invention includes a motor 2 for controlling the opening and closing of a throttle valve 1 of an internal combustion engine, and a torque transmission for transmitting rotational torque of the motor 2 to the throttle valve 1. device 3, an accelerator sensor 5 that generates an output signal corresponding to the depression of the accelerator veda)'v4, a rotational speed sensor 6 for detecting the engine rotational speed when the internal combustion engine is operating, and an output signal from the accelerator sensor 5. It outputs a drive current to control the motor 2 according to the engine speed, and also sets the allowable maximum rotation speed of the internal combustion engine, compares the set maximum allowable rotation speed with the output signal from the rotation speed sensor 6, and determines the engine rotation speed of the internal combustion engine. The internal combustion engine is equipped with an electric control circuit 7 for canceling throttle valve control by operating an accelerator pedal 4 and controlling the engine speed of the internal combustion engine to below the maximum allowable speed when the engine speed exceeds the maximum allowable speed. Located in the engine's throttle valve control device.

Second invention line As shown in FIG. 2, a motor 2 for controlling the opening and closing of the slot/I/vap 1 of the internal combustion engine and the rotational torque of the valve 2 are transmitted to the throttle valve 1. an accelerator sensor 5 that generates an output signal corresponding to the amount of depression of A/4 and A/4.
, a vehicle speed sensor 8 for detecting the speed of the vehicle when the internal combustion engine is operating, and a drive current for controlling the car seat 2 according to output signals from the accelerator sensor 5 and the maximum allowable distance of the vehicle. The output signal from the vehicle speed sensor 8 is compared with the set maximum allowable speed, and if the vehicle speed exceeds the maximum allowable distance, the throttle bump control by operating the accelerator pedal 4 is released. The engine is equipped with an electric control circuit 9 for controlling the speed to a maximum allowable speed or less, and a torque control f1m device for the engine.

tIg3''4IIth invention is a motor 2 for controlling the opening and closing of a throttle valve 1 of an internal combustion engine, as shown in FIG.
, a torque transmission device 3 for transmitting the tachometer of the motor 2 to the throttle valve 11C, an accelerator sensor 5 for generating an output signal corresponding to the amount of depression of the accelerator pedal 4, and an engine when the internal combustion engine is operating. A rotation speed sensor 6 for detecting the rotation speed, a vehicle speed sensor 8 for detecting the vehicle speed when the internal combustion engine is operating, and a drive current for controlling the motor 2 according to output signals from the accelerator sensor 5. At the same time, the output signal from the rotation speed sensor 6 is compared with the allowable maximum rotation speed of the internal combustion engine, which is set corresponding to the vehicle speed, and if the engine rotation speed of the internal combustion engine exceeds the maximum allowable rotation speed, the Electric controller fil! for canceling throttle valve control by steering control and controlling the engine speed of the internal combustion engine to below the maximum allowable speed. ! A throttle valve control device for an internal combustion engine is provided with a throttle valve control device for an internal combustion engine.

(Embodiment of the Invention) The configuration of an embodiment of the present invention will be explained with reference to FIGS. 4 and 5. FIG. In FIG. 4, a throttle valve 11 of an internal combustion engine is fixed to a throttle shirt 12, and the opening area of an air intake passage 14 is adjusted by rotation of a throat shaft 12 on a bearing provided in a carburetor 13. A throttle back spring 15 for biasing the throttle valve 11 in the fully closing direction has one end connected to a lever 16 attached to the throttle shaft 12 and the other end connected to a throttle of the carburetor 16).
It is attached to a placket 29 fixed to the outer part of the bearing provided for the μV yaf) 12.

A step valve 17 for controlling the opening and closing of the throttle valve 11 is attached to the output shaft 2 of the step valve 17 which is screwed onto the carburetor 13 through a bolt 18 and a collar 19.
0 is the throttle valve via levers 21 and 16) 12
is engaged with. An output signal from an accelerator sensor 23 that generates an output signal corresponding to the amount of depression of the accelerator control/L' 22 is input to an electric control circuit 24 . 25 is a rotation speed sensor for detecting the engine speed of the internal combustion engine, 26 is a speed sensor for detecting the speed of the vehicle), and their respective output signals are inputted to the electric control circuit 24.

Reference numeral 27 denotes an even V open switch for connecting the control circuit 28 and the electric control circuit 24. Note that the rotational torque of the step motor 17 is transmitted from the output shaft 20 to the lever 21. Although the torque is transmitted to the throttle shaft 12 via the lever 16, it is also possible to transmit the torque by using a torque transmission device using a gear meshing mechanism instead of the lever 21 and the lever 16.

! 5 shows a control block diagram of the electric control circuit 24, and 3
1 is a waveform shaper for shaping the trigger output signal output from the rotation speed sensor 25 for detecting the engine rotation speed of the internal combustion engine into a waveform close to a rectangular wave; 62 is a waveform shaper for shaping the analog output signal from the accelerator sensor 23; An A-D converter for converting into a digital signal, 33 is a microcomputer CPU component (to be described later), and 34 is a motor drive for outputting a drive current to step 17 according to an output signal from the microcomputer CPU (to be described later). The circuit, 35 is a power supply circuit of the electric control circuit 24, and the CPU inputs the output signals of the rotation speed sensor 25, the accelerator sensor 23, and the vehicle speed sensor 26, and performs arithmetic processing according to the control program.
a microcomputer for outputting drive signals to 7;
ROM indicates a storage circuit containing a control program including a set value program for the maximum allowable rotation speed of the internal combustion engine and the maximum allowable speed of the vehicle.

(Operations of the Embodiment) Next, the operations on the Kinomio side will be explained with reference to the flowchart shown in FIG. Step 101 of allowable rotation speed control determination routine
When the accelerator control is depressed, the accelerator sensor 23 activates /I/veda A/22 when the accelerator pedal μ22 is depressed.
An output signal corresponding to the amount of depression is generated and the electric control circuit 2
A step signal is inputted to the microcomputer Cptuc through the I10 port 53, and the microcomputer CPUtJ performs arithmetic processing according to the control program to generate a step signal in comparison with the amount of drive of the step 17. The output signal obtained from the stellar rotation speed and the rotation speed sensor 25 controls the opening of the thrower μbap 11 by outputting a drive current to the motor drive circuit and outputting a drive current from the drive circuit to the step motor 17. The engine speed during operation is compared, and when the engine speed during operation exceeds the maximum allowable rotation speed, micro combiator CPtT is activated as a slot μ control release means by operating the accelerator pedal μ in step 103. -, the input signal from the .mu. sensor 23 is canceled, and in step 104, the step motor rotation direction which is the throttle valve closing direction and a drive step signal are output to the motor drive circuit 34. Step 105
At step 106, the motor drive circuit 34 outputs a drive current to the step Tanabata 17, and controls the throttle valve 11 in the closing direction so that the engine speed becomes below the maximum allowable speed. It is determined whether or not the engine rotation speed has fallen below the maximum rotation speed b, and if the engine rotation speed is still above the allowable maximum rotation speed, the process returns to step 104 and continues control.

As a result, the engine rotation speed is set in advance regardless of the accelerator operation by the driver, and the engine rotation speed is set in advance to the maximum allowable rotation speed of 7000, for example.
~8000℃pm or less, which significantly improves the durability of the internal combustion engine, and also prevents runaway driving by revving the internal combustion engine to full capacity when starting the vehicle, improving vehicle durability and fuel efficiency. It is also possible to improve the characteristics.

Next, the allowable vehicle speed control determination routine will be explained. If the accelerator control in step 107 is performed in the same manner as the accelerator control in step 101 of the allowable rotational speed control determination μm, in step 108, the microphone data processing unit PU is stored in the storage circuit ROMK, and the nine vehicle Allowable maximum speed and vehicle speed sensor! The vehicle speed during operation obtained from the output signal from l-26 is compared, and when the vehicle speed during operation exceeds the maximum allowable speed, in step 109, the slot! As a control canceling means, the microcomputer cput;t cancels the input signal from the accelerator sensor 23, and in step 110 outputs the step cage rotation direction and drive step signal, which is the throttle valve closing direction, to the cage drive circuit 34. . In step 111, the step grinding wheel is
At Step 17, a drive current is output and the throttle valve 11 is controlled in the closing direction so that the vehicle speed is below the allowable maximum speed.In Step 112, it is determined whether the vehicle speed is below the allowable maximum speed or not. If the maximum speed is higher than the allowable maximum speed, the process returns to step 110 and continuous control is performed.The speed of the vehicle is set in advance to ensure safe driving of the vehicle, and the speed of the vehicle is suppressed to, for example, 120 to 130 km/h or less. For example, if a driver is driving on an expressway,
It is possible to drive safely even when the driver is fully depressed, and the steering wheel can be operated sufficiently to avoid an accident while driving, and as a result, accidents during high-speed driving can be prevented.

Next, in the accelerator control in step 113 of the allowable rotation speed control determination routine corresponding to the vehicle speed, when the accelerator Veda fi/22 is depressed, an output signal corresponding to the depression situation of the accelerator Veda/I/22 is output from the accelerator sensor V-23. generated by the A-D converter 32 of the electrical control circuit 24, x10 baud) 3
3, and the microcomputer CPU performs arithmetic processing according to the control program, and then outputs a step signal corresponding to the drive amount of the step motor 17 to the grinder drive circuit. By outputting a drive current from the drive circuit to the step motor 17, the opening of the throttle valve 11 is controlled.

In step 114, the microcombi, -ta CPIJ
is stored in the memory circuit ROM, and corresponds to the maximum allowable rotation speed of the internal combustion engine, that is, the internal combustion engine can follow it, is suitable for the engine characteristics, and does not cause any loss such as waste of fuel. The engine speed during operation obtained from the output signal from the rotation speed sensor 25 is compared with the maximum allowable rotation speed, and if the engine speed during operation exceeds the maximum allowable rotation speed, then in step 115, the slot is set by the accelerator μ operation. ! As a means of releasing control! The input signal CPυ from the accelerator sensor +23 is released, and in step 116, the step motor rotation direction and the drive step signal, which is the throttle valve closing direction, are output to the motor drive circuit 34.

In step 117, a drive current is output from the cage drive circuit 34 to the step drive circuit 17, and the slot and top pumps 11 are controlled in the closing direction so that the engine speed is below the maximum allowable rotation speed. Step 118 determines whether the engine speed is below the maximum allowable speed, and if the engine speed is still above the maximum allowable speed, step 11
Return to step 6 and use the continuation system.

This not only prevents unreasonable acceleration due to tire slippage caused by rapid vehicle start-up, but also prevents a drop in fuel efficiency even if the driver has a habit of pressing the accelerator pedal too hard. In addition, it is possible to ensure safe driving of the vehicle and extend the life of the vehicle.

(Effects of the Invention) The present invention provides a method for controlling engine rotation speed when the engine rotation speed corresponding to the amount of depression of the accelerator pedal exceeds an appropriate value determined by, for example, the durability, safety, driving characteristics, etc. of a vehicle including an internal combustion engine. By controlling the rotation speed K to an appropriate rotation speed that is lower than the rotation speed corresponding to the amount of depression of the accelerator pedal, there is an effect that the durability, safety, driving characteristics, etc. of the vehicle can be improved.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram clearly showing the configuration of the first invention,
FIG. 2 is an overall configuration diagram clearly showing the configuration of the 211th invention, FIG. 3 is an overall configuration diagram clarifying the configuration of the third invention, FIG. 4 is an explanatory diagram of the embodiment of the present invention, FIG. 5 is a control block diagram of the electric control circuit, and FIG. 6 is a control flowchart. 1...Slob) Rubalp 2...Motor 3.
...Torque transmission device 4...Accelerator pedal μ5...
Accelerator sensor 6-・Engine speed sensor 7.9.10
-...Electrical control circuit 8...Vehicle speed sensor applicant
Aiminigyo Co., Ltd. Representative Patent Attorney Oka 1) Hidehiko

Claims (1)

[Scope of Claims] (1) An accelerator for controlling the opening and closing of the sushitμ pulp of an internal combustion engine, a torque transmission device for transmitting the rotational torque of the suction mu pulp to the thrower pulp, and an accelerator pedal. an accelerator sensor that generates a travel output signal in response to the amount of depression of the engine; a rotational speed sensor that detects the engine speed when the internal combustion engine is operating; and a rotational speed sensor that controls the throttle in accordance with the output signal from the accelerator sensor. Outputs the drive current for the internal combustion engine and sets the maximum allowable rotation speed of the internal combustion engine. Compare the output signal from the IIIIB rotation speed sensor and if the engine speed exceeds the maximum allowable rotation speed, release the Ishisutta μ pulp control by operating the Aku7μ pedal μ and allow the engine speed. 1. A throttle valve control device for an internal combustion engine, characterized in that it is equipped with a nine-g-air control circuit for controlling the rotational speed below a maximum speed. (2) A motor for controlling the opening and closing of the throttle valve of the internal combustion engine, a torque transmission device for transmitting the rotational torque of the engine to the throttle and torque pump, and the depression of the actuator. an accelerator sensor that generates an output signal corresponding to the engine speed, a vehicle speed sensor that detects the speed of the vehicle when the internal combustion engine is operating, and a drive current that controls the peak-to-peak speed according to the output signal from the accelerator sensor. At the same time, the vehicle's allowable maximum speed is set, and the set allowable maximum speed is compared with the output signal from the vehicle speed sensor, and if the vehicle speed exceeds the allowable maximum speed, the throttle bap is applied by operating the accelerator pedal. 1. A throttle valve control device for an internal combustion engine, comprising an electric control circuit for releasing the control and reducing the vehicle speed below the maximum allowable speed. (8) A round frame that controls the opening and closing of the throttle valve of the internal combustion engine, a torque transmission device that transmits the rotational torque of the motor to the throttle valve, and a drive output signal that generates a travel output signal corresponding to the amount of depression of the accelerator pedal. Accessories A/-
a rotation speed sensor for detecting the rotation speed of the engine when the internal combustion engine is operating; a vehicle speed sensor for detecting the vehicle speed when the internal combustion engine is operating; In addition to outputting a drive current for controlling the engine speed, the output signal from the rotation speed sensor is compared with the maximum allowable rotation speed of the internal combustion engine, which is set corresponding to the vehicle speed, and the engine rotation speed is determined as the maximum allowable rotation speed. Throttle valve control for an internal combustion engine, comprising an electric control circuit for canceling throttle valve control by accelerator pedal operation and controlling engine speed to below a maximum allowable speed when the speed exceeds the maximum allowable speed. Device.