JPH01216052A - Control for preventing runaway of car - Google Patents

Abstract

PURPOSE:To prevent runaway of a vehicle securely regulating the fuel supply quantity when the vehicle speed is increased by stepping an accelerator at an acceleration over a set acceleration and when an acceleration over a set acceleration continues for more than a set time at more than a set vehicle speed respectively. CONSTITUTION:In a type where the fuel supply quantity is adjusted by stepping an accelerator pedal 11 to move a control rack 19 of a fuel injection pump 18 through a link mechanism L, a movable support point idle lever 16 is provided in the middle of the link mechanism L. Fuel supply quantity is regulated by oscillation of this idle lever 16 by an air cylinder 21 to which air is supplied from an air tank 20 through an electromagnetic valve 22. The electromagnetic valve 22 is controlled to restrict fuel supply quantity by a CPU 23 when a vehicle speed is increased by stepping an accelerator at an acceleration more than a set acceleration and when an acceleration more than a set acceleration continues for more than a set time when the vehicle is running at more than a set vehicle speed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control method for preventing runaway of an automobile. Sometimes I press the accelerator pedal.

If this happens, the engines of modern passenger cars are made to have a large output per weight, so there is a risk that the cars will accelerate suddenly and cause an accident.

[Problem to be solved by the invention]

The present invention has been proposed in view of the above circumstances, and provides a safe vehicle runaway prevention control method that prevents accidents caused by sudden acceleration when the accelerator pedal is mistakenly depressed for the brake pedal. The purpose is to

[Means to solve the problem]

To this end, the present invention automatically regulates the amount of fuel supplied when the vehicle speed increases by depressing the accelerator and the acceleration exceeds the set acceleration. The feature is that the fuel supply amount is automatically regulated when it continues for a set time or longer.

[For production]

With this configuration, if the accelerator pedal is mistakenly pressed as the brake pedal while driving, the amount of fuel supplied will be automatically regulated when the acceleration exceeds the set acceleration, and the amount of fuel supplied will be automatically regulated while driving at the set speed or higher. When the acceleration above the set acceleration continues for more than the set time, the fuel supply amount is automatically regulated.
Prevent runaway behavior due to incorrect operation.

〔Example〕

One embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is an overall block diagram thereof, Fig. 2 is a fuel regulation mechanism diagram showing the accelerator restriction block of Fig. M1, and Fig. 3 is a diagram showing part FIG.

First, in FIG. 1, acceleration is detected in block 2 based on the vehicle speed detected in block 1, and based on these vehicle speeds and accelerations, the a driving mode is set to prevent sudden acceleration at low speed, The B driving mode, which prevents rapid acceleration from continuing for more than a certain period of time at medium speeds, is automatically performed, and the C driving mode, which is high speeds and has no accelerator restrictions, is performed according to the driver's selection.

That is, first, in block 3, the driver manually presses C.
Unless a mode is selected, the vehicle speed is compared with a set speed, e.g. 404/h, in block 4, and if vehicle speed ≦40 fan
/h, the a mode is adopted in block 5, and the accelerator is restricted in block 7 in the manner described later.

If the vehicle speed is >40 b/h in block 4, the magnitude of the acceleration is determined in block 8, and if the acceleration is less than the set value, the acceleration is continued in block 6 via block 5 in the same manner as above. The length of time is determined, for example,
If the duration is 0.5 J or less, the a mode with accelerator restriction' is adopted in block 7, but if it exceeds 0.5 J, the C mode with no accelerator restriction is adopted in block 9.

Note that when the C mode is manually selected by the driver, blocks 4 to 8 are not activated, and operation without accelerator restriction is performed according to block 9.

Next, the action of the accelerator restriction block 7 will be explained with reference to FIG. 2. When the accelerator pedal 11 is depressed, the arm 12. Link 13. Lever 14. Link 15. Through the movable fulcrum idler lever 16 and link 17f, the control rack 19 of the fuel injection pump 18 moves in the direction of the arrow, and the amount of fuel supplied increases in proportion to the amount of depression of the accelerator pedal.

Here, the idler lever 6 is as shown in FIG.
The fulcrum of the air cylinder 21, which expands and contracts with the air supplied from the air tank 20, moves to the left, and the amount of air supplied to the air cylinder is controlled by the solenoid valve 22, which opens and closes according to the output of the CPU 23. ing.

Therefore, as mentioned above, if the fulcrum of the idler lever 6 is immovable, pressing the accelerator pedal will rotate the idler lever 6 to the solid line position, and the control rack 9 of the fuel injection pump will move to the right by jl. However,
When an accelerometer (not shown) detects an acceleration higher than a set value, the solenoid valve 22 is actuated by the output signal of the CPU 23, and the air cylinder 21 is activated by air from the air tank.
expands, and as a result, the upper end of the idler lever moves to the left by 12, as shown by the broken line, so the control rack moves to the right by 1 = 11-712.
A corresponding amount of fuel is provided to the engine.

Here, the movement of the fulcrum of the idler lever by the air cylinder is proportional to the amount of air being supplied and discharged from the air cylinder, and the setting can go crazy, but the engine speed suddenly changes from full rotation speed to idle speed. Since lowering the rotational speed gives a sense of shock to the occupants, it is usually practical to set the fuel supply amount to correspond to an appropriate rotational speed between the full rotational speed and the idle rotational speed.

Effect of the invention〕 According to such a method, the following effects can be achieved.

(1) When driving at low speed and suddenly accelerating by pressing the accelerator, if the acceleration is small, it will remain as it is, but if the acceleration is large, the car will continue to accelerate despite pressing the accelerator.
The fuel supply amount is automatically regulated to the set amount.

(2) When driving at medium speed and suddenly accelerating due to accelerator depression, if the large acceleration ends in a short period of time, it will remain as it is, but if the large acceleration continues for a long time, the automatic acceleration will occur regardless of accelerator depression. The fuel supply amount is regulated to the set value.

(3) When driving at high speeds, if the driver manually switches the driving mode, the above-mentioned automatic regulation of the fuel supply amount will be removed and the vehicle can be driven without accelerator restriction.

In short, according to the present invention, when the vehicle speed increases at an acceleration higher than the set acceleration due to depression of the accelerator while driving, the fuel supply lid is automatically regulated, and while the vehicle is running at a speed higher than the set speed, when the vehicle speed increases at an acceleration higher than the set acceleration. Automatically regulates the amount of fuel supplied when this continues for more than a set time, thereby preventing accidents caused by sudden acceleration when the accelerator pedal is mistakenly pressed for the brake pedal.Safe vehicle runaway prevention. The present invention is extremely useful industrially because it provides a control method.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing a fuel supply regulation mechanism that restricts the accelerator shown in Fig. 1, and Fig. 3 shows the action of the idler lever shown in Fig. 2. FIG. l...Vehicle speed input block, 2...Acceleration plate detection block,
3...Mode judgment block, 4...Single series judgment block,
5...Mode determination block ■, 6...Timer block, 7...Accelerator limit block, 8...Acceleration block, 9...Accelerator limit release block, 11...Accelerator pedal, 12...Arm, 13...Link , 14...Lever, 15...Link, 16...Idler lever, 1
7... Link, 18... Fuel injection pump, 19... Control rack, 20... Air tank, 21... Air cylinder, 22... Solenoid valve, 23... CPU

Claims (1)

[Claims] When the vehicle speed increases to an acceleration higher than the set acceleration due to pressing down on the accelerator while driving, the fuel supply amount is automatically regulated, and while the vehicle is driving at a speed higher than the set speed, the acceleration higher than the set acceleration continues for a set time. A runaway prevention control method for an automobile, characterized in that the amount of fuel supplied is automatically regulated when the vehicle runs out of control.