JPS6021893B2 - Brake priority accelerator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake priority type accelerator device that gives priority to the brake when the accelerator pedal and the brake pedal are depressed at the same time.

In recent years, automatic transmissions have become popular,
Many cars do not have clutch pedals, and in such cars it is possible to press both the gas and brake pedals at the same time.

Furthermore, in cars used for training purposes, the trainee may press the accelerator pedal and the instructor may press the brake pedal at the same time. In these cases, the braking force is insufficient and it is very dangerous.
An object of the present invention is to provide a brake priority type accelerator device that gives priority to the brake when the accelerator pedal and the brake pedal are depressed at the same time.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the invention. The accelerator device 1 is provided with a low pressure chamber 3 and a high pressure chamber 4 separated by a diaphragm 2. Accelerator pedal 5 in hyperbaric chamber 4
An accelerator rod 6 connected to the housing passes through the housing in an airtight manner, and its tip protrudes into the low pressure chamber 3. A cup-shaped pressure difference responsive member 7 is movably arranged in the low pressure chamber 3, and its rear end surface contacts the diaphragm 2 so as to receive pressure from the diaphragm 2. The pressure differential response village 7 is connected by a pin 8 to a connecting punch 9, and the connecting village 9 is connected to a throttle valve 11 in a carburetor 10. A control spring 13 that also serves as a return spring is inserted between a spring receiver 12 provided at the tip of the accelerator rod 6 and the inner wall of the rear end of the pressure difference responsive member 7, and the control spring 13 moves the accelerator rod 6 in the throttle valve closing direction. It receives a force (toward the right in Figure 1), and its tip hits the connecting village 9. Brake device 1
4 is equipped with a servo motor 15, and a brake pedal 16
drives the control valve 17 for the servo motor.

The servo motor control valve 17 normally causes the high pressure chamber 18 of the servo motor 15 to be driven by the low pressure chamber 19 of the servo motor 15 to maintain the vacuum pressure, and the brake pedal 1
When step 6 is stepped on, the connection between the high pressure chamber 18 and the low pressure chamber 19 is cut off, and the high pressure chamber 18 is opened to the atmosphere.
Bring to atmospheric pressure. 20' piston of servo motor 15,
21 is a master cylinder, and 22 is a foil cylinder.

The low pressure chamber 19 is connected to an intake manifold 27 via a pipe 23, a check valve chamber 24, a check valve 25, and a pipe 26, and is always maintained at a vacuum pressure. The low pressure chamber 3 of the accelerator device 1 is connected to the low pressure chamber 19 of the servo motor 5 via the trailing port 28, the check valve chamber 24 and the pipe 23, and the high pressure chamber 4 is connected to the connection port 29 and the pipe 3.
0 and enters the high pressure chamber 18 of the servo motor 5.
Note that the servo motor 15 maintains the low pressure chamber 19 and the high pressure chamber 18 at atmospheric pressure at all times, and when the brake is applied, the low pressure chamber 1
9 may be switched to vacuum pressure, or both chambers 19 and 18 may be maintained at atmospheric pressure at all times, and compressed air may be introduced into high pressure chamber 18 when the brake is operated. When the flake device 14 is not operating, the servo motor 15
Since the high pressure chamber 18 is maintained at a vacuum pressure, the high pressure chamber 4
The low pressure chamber 3 is also maintained at a vacuum pressure, and no pressure difference occurs between the low pressure chamber 3 and the low pressure chamber 3.

When the accelerator pedal 5 is depressed in this state, the accelerator rod 6 moves in the direction of opening the throttle valve (in the direction of the arrow in FIG. Because of this movement, the throttle valve 11 opens and the amount of air-fuel mixture sent from the carburetor 10 increases. When the brake pedal 16 is pressed while the accelerator pedal 5 is pressed, the brake device 14 is operated, but at this time, atmospheric pressure is introduced into the high pressure chamber 18 by the action of the servo motor control valve 17. The pressure in the high pressure chamber 4 of the accelerator device 1 also becomes atmospheric pressure, and a pressure difference is created between the high pressure chamber 4 and the low pressure chamber 3, and the diaphragm 2 compresses the control spring IJ ring 13 while compressing the pressure difference responsive member 7 and the throttle. Press in the valve closing direction (rightward in Figure 1).

As a result, the pressure difference responsive member 7 and the connection village 9 are moved to the throttle valve closing method, and the throttle valve 11 is closed. Therefore, the amount of air-fuel mixture in the intake manifold 10 is reduced, and the braking device 14 can exert sufficient braking effect, giving priority to the braking. When the accelerator pedal 5 is pressed during operation of the brake device 14, the diaphragm 2 presses the pressure difference response member 7 in the direction of closing the throttle valve due to the pressure difference between the high pressure chamber 4 and the low pressure chamber 3, and the green front end of the diaphragm 2 presses the pressure difference response member 7 in the direction of closing the throttle valve. Front end wall 3 of chamber 3
1, only the accelerator rod 6 moves in the direction of the arrow in FIG. 1 while compressing the control spring 13. Therefore, the throttle valve 11 remains closed and the brake takes priority. As described above, the control spring 13 causes the pressure difference responsive member 3 to follow the accelerator rod 6 when only the accelerator pedal 5 is depressed, and when both the accelerator pedal 5 and the brake pedal 16 are depressed at the same time. , the function of causing the accelerator rod 6 to follow is lost. FIG. 2 shows another embodiment of the invention.

In this embodiment, a return spring 32 is provided separately from the control spring 13, and the spring pressure of the return spring 32 is set to be stronger than the spring pressure of the control spring 13. The accelerator rod 6 is arranged in the high pressure chamber 4, and the spring receiver 12 at its tip only contacts the diaphragm 2.
The connecting punch 9 is connected to the pressure difference responsive part village 7 by a screw 33. When only the accelerator pedal 5 is depressed, the accelerator rod 6 moves in the direction of opening the throttle valve (in the direction of the arrow) while compressing the return spring 32, and the pressure difference response section 7 and the connecting punch 9 actuate the accelerator by the action of the control spring 13. It follows the rod 6. This opens the throttle valve 11. When a pressure difference occurs between the high pressure chamber 4 and the low pressure chamber 3 during operation of the brake device 14, the pressure difference applying member 7 is pressed by the diaphragm 2 in the direction of closing the throttle valve. As a result, the function of causing the pressure difference responsive section 7 to follow the movement of the accelerator rod 6 is lost.

Therefore, even if the accelerator pedal 5 is depressed, the throttle valve 11 remains closed and the brake takes priority. In the present invention, when the accelerator pedal and the brake pedal are pressed at the same time, a pressure difference is created between the low pressure chamber and the high pressure chamber, and the diaphragm presses the control spring, thereby causing the pressure difference responsive section to move toward the accelerator rod. Since the diaphragm does not follow the movement of the throttle valve in the opening direction, and at the same time the diaphragm presses the pressure difference response member in the throttle valve closing direction, priority can be given to the brake when the accelerator pedal and brake pedal are depressed at the same time. can.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the invention, and FIG. 2 is a sectional view showing another embodiment of the invention. 1...Accelerator device, 2...Diaphragm, 3...Low pressure chamber, 4...High pressure chamber, 5...Accelerator pedal, 6... Accelerator rod, 7... Pressure difference support member, 9...
...Connection village, 11... Throttle valve,
13... Control spring, 15... Servo motor, 18
...High pressure chamber, 19...Low pressure room. ? 1 diagram

Claims (1)

[Claims] 1 A low-pressure chamber and a high-pressure chamber are separated by a diaphragm and create a pressure difference due to brake operation, and when a pressure difference occurs between the low-pressure chamber and the high-pressure chamber, the diaphragm pushes the throttle valve in the closing direction. A pressure difference responsive member is movably arranged in a low pressure chamber, a throttle valve is connected to the pressure difference responsive member via a connecting means, and an accelerator rod connected to an accelerator pedal is movable in the axial direction of the pressure difference responsive member. When there is no pressure difference between the low-pressure chamber and the high-pressure chamber, the pressure difference responsive member follows the movement of the accelerator rod in the opening direction of the throttle valve, and when there is a pressure difference, the pressure difference responsive member is activated by receiving pressure from the diaphragm. A brake priority type accelerator device is provided with a control spring that loses its function of causing a pressure difference responsive member to follow movement of the accelerator rod in the throttle valve opening direction.