JPS5853658A - Supply amount control method of mixture in automobile - Google Patents

Abstract

PURPOSE:To decrease a speed change time and reduce a shock in an automatic speed changer, by controlling a mixture supply amount at speed change of the automatic speed changer capable of performing the speed change while transmitting an output from an engine. CONSTITUTION:The other end of a rocker arm 5, adapted to a piston rod 3 of an oil hydraulic cylinder 2, is connected through a link 7 to a throttle lever 6, integrally formed with a throttle valve 1, and a signal of an opening sensor 9 of the valve 1 is fed to a device 12, controlling a solenoid valve 11, then operation of a spool valve 13, regulating a feed of pressure oil to the cylinder 2, is controlled by the valve 11. For instance, at speed change to a lower speed stage, the valve 11 is controlled by the device 12 to a closing direction to increase oil pressure, while the valve 1 is opened to increase an engine speed, and a prescribed engine speed is detected by the device 12 through the sensor 9 to perform speed change operation. Here the operation is switched to the lower speed stage under a high engine speed condition, and a shock is not felt.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air-fuel mixture supply amount control method capable of alleviating shocks during acceleration and deceleration caused by gear shifting operations of an automobile equipped with an automatic transmission.

In a car equipped with an automatic transmission that can change gears while transmitting output from the engine, when you press the accelerator pedal to shift to a high gear, or when you press the accelerator pedal to shift to a low gear. Absorbed energy obtained by subtracting unit drive energy from the sum of rotational inertia energy possessed by the engine and energy supplied from the engine is absorbed by the friction element. This absorbed energy is proportional to the product of the rotation speed difference between the two friction elements at the beginning of the shift, the friction torque during the shift, and the shift time.
Once specifications such as gear ratio and operating conditions are determined, this value will be constant.

Therefore, for example, if the friction torque is reduced to reduce the seams during gear shifting, the difference in the rotational speed of the friction elements will increase and the durability will decrease.In reality, the friction torque and gear shifting time are It has been decided that

The present invention focuses on the fact that conventional automatic transmissions have no interlocking relationship with the engine. 2. It is important to control the engine rotation speed during gear shifting, shorten gear shifting time, reduce friction torque, and reduce frictional torque during gear shifting. It is an object of the present invention to provide a method for controlling the amount of air-fuel mixture supplied that can reduce the shock of the air-fuel mixture.

The configuration of the method for controlling the amount of air-fuel mixture supplied to an automobile according to the present invention to achieve this object is such that the amount of air-fuel mixture supplied is controlled when an automatic transmission that can change gears while transmitting output from an engine of an automobile is shifted. It is characterized by this.

When using a capretor to control the amount of air-fuel mixture supplied, this is done by opening and closing the throttle valve to change the amount of air, and when using a fuel injection device, the amount of fuel directly injected is controlled. Do this by changing. Also, when the accelerator pedal is pressed to shift to a high gear, the supply amount of the mineral mixture is reduced or stopped to lower the engine speed and reduce the shift shock during acceleration, while the gear is shifted to a lower gear without pressing the accelerator pedal. When changing gears, the amount of air-fuel mixture supplied is increased to increase engine speed, thereby easing the gear shifting at low speeds. For this reason, it is necessary to synchronize the gear shift operation and engine output control as much as possible, and a system that can immediately respond to shift detection with output control is desirable. From this point of view, we use a Y1 child-controlled automatic transmission that detects the engine load, vehicle speed, etc. and performs gear change operations.
The shift control command is used as an output control signal for the engine, or the time of shift is detected by the rotation of two arbitrary shafts between the input and output shafts of the automatic transmission and its fluctuation, and the electronic fuel injection system At present, the present invention can be achieved most effectively and easily by controlling the amount of fuel injected by the fuel injection valve. In this case, the electronic fuel injection system is independent for each cylinder (
If it is a pine pointer type or a direct injection type, it is possible to improve the response to higher speed operation.Hereinafter, we will explain an example in which the present invention is applied to an automobile in which a carburetor is installed. The control principle will be explained in detail with reference to the drawings.

The piston rod 3 of the hydraulic cylinder 2, which opens and closes the throttle valve 1 preferentially during gear changes in response to an accelerator pedal (not shown), is equipped with a swing arm 5, m-, which can swing around a support shaft 4. The other end of this swing arm 5 is in contact with the throttle valve 1. ! Two integrated throttle levers 6 are connected via a link 7. When pressure oil is supplied into the hydraulic cylinder 2, the piston rod 3 rotates the swinging arm 5 against the spring force of the compression spring 8, which opens the throttle valve 1 and supplies the air-fuel mixture to the engine. Increase supply. A throttle opening sensor 9 such as a potentiometer that detects the opening of the throttle valve 1 is in contact with a disc cam IO integrated with the throttle valve 1, and the detection signal is sent to a control device 12 that duty-controls the opening and closing of the solenoid valve 11. Sent. It controls the operation of the spool valve 13 that adjusts the supply of hydraulic pressure to the electromagnetic auxiliary hydraulic cylinder 2. It is opened during steady driving, which is dangerous during gear changes, and the spool 14 of the spool valve 13 is compressed by the spring force of the spring 15. The cylinder is moved to the left in the figure, and the pressure oil in the hydraulic cylinder 2 is discharged from the oil drain pipe 18 to the outside.

Therefore, when shifting to a low gear, the control device 12 controls the opening and closing of the solenoid valve 11 to increase the pressure of the pressure oil, and the spool 14 of the spool valve 13 resists the spring force of the compression spring 15. When the cylinder is moved to the right side in the figure, pressure oil is supplied into the hydraulic cylinder 2 from the pressure oil introduction passage 16 connected to a pressure oil source (not shown) through the pressure oil supply passage 17, and the throttle valve 1 is opened. This increases the amount of air-fuel mixture supplied and increases the engine speed. The control device 1 detects the point in time when the engine speed reaches a predetermined value via the throttle opening sensor 9.
2 is detected, a gear change operation is performed, but the engine speed is increased and the gear is shifted to a low gear in good condition, so no unpleasant shock is felt. In addition, when shifting to a high gear, the control device 12 opens and closes the solenoid valve 11 to close the spool 14 of the 4 spool valve 13 (by the spring force of the compression spring 15) on the left side in the figure. When the pressure oil in the hydraulic cylinder 2 is discharged from the pressure oil supply path 17 through the oil drain path 18 of the spool valve 13, the throttle valve l is closed by the spring force of the compression spring 8 and the engine rotation speed is increased. decreases.

Since the control device 12 switches to the high speed gear when the engine speed reaches a predetermined value, the driver does not feel any unpleasant shock.

As described above, according to the air-fuel mixture supply amount control mechanism of the present invention, while increasing the air-fuel mixture supply amount when switching to a low gear,
Since it is possible to stop or reduce the amount of air-fuel mixture supplied when switching to a high gear, it is possible to reduce the amount of energy absorbed during gear shifting, and as a result, it is possible to shorten gear shifting time or reduce shock during gear shifting. or the durability of the friction element can be improved.

[Brief explanation of the drawing]

The drawing is a principle diagram showing the outline of a control structure of an embodiment in which the present invention is applied to a car with a carburetor. In the drawing, 1 is a throttle valve, and 2 is a hydraulic cylinder. 3 is a piston rond, 5 is a swing arm, 6 is a throttle lever, 7 is a link, 8.15 is a compression spring, 9 is an expansion four-liter opening sensor, 10 is a disc cam, 11 is a solenoid valve, 12 is a control 13 is a spool valve, and 14 is a spool.

Claims (5)

[Claims] (1) A method for controlling the amount of air-fuel mixture supplied to an automobile, characterized in that the amount of air-fuel mixture supplied is controlled during gear shifting of an automatic transmission capable of changing gears while transmitting output from the engine of the automobile. (2) The method for controlling the amount of air-fuel mixture supplied to an automobile as set forth in claim 1g1, characterized in that the amount of air-fuel mixture supplied is controlled by opening and closing a throttle valve of a carburetor. (3) The method for controlling the amount of air-fuel mixture supplied to an automobile as set forth in claim 1, characterized in that the amount of air-fuel mixture supplied is controlled by a fuel injection device. (4) Claims 1 and 2, member rJ, item 3, characterized in that the supply of air-fuel mixture is reduced or stopped when the accelerator pedal is pressed to shift to a high speed gear. A method for controlling the amount of air-fuel mixture supplied to an automobile. (5) When shifting to a lower gear without pressing the accelerator pedal,
The method for controlling the amount of air-fuel mixture supplied to a motor vehicle as set forth in claim S (1), (2), or (3), characterized in that the amount of air-fuel mixture supplied is increased.