KR20110075891A - Atmosphere pressure typed fail-safe device of regenerative brake system - Google Patents

Abstract

PURPOSE: A pneumatic type fail-safe mechanism of a regenerative braking system is provided to have pedal feel like hydraulic pressure by forming a pedal simulator in the pneumatic type, and to embody fail-safe in a more stable mechanism. CONSTITUTION: A pneumatic type fail-safe mechanism of a regenerative braking system includes a pedal simulator(10) which forms pedal stepping force following hydraulic hysteresis effect with spring elastic force, and embodying fail-safe using vacuum pressure and air pressure when a booster(2) is failed by interlocking with a booster. The pedal simulator includes a housing block(11) formed in an air pressure space to form vacuum pressure on the booster, an inner housing(12) provided with a moving rod connected from a pedal(1) to the booster, a stepping force reaction member composed of at least one or more springs compressed and transformed by the movement of the moving rod, and a return member(19) supplying elastic restoring force to the initial position.

Description

Atmospheric pressure typed fail-safe device of regenerative brake system

The present invention relates to Korean Patent Application No. 10-2008-0125712 (2008.12.11) filed by the applicant of the present invention, in particular by applying a pneumatic pressure instead of a hydraulic valve to implement a more stable fail-safe (Fail-Safe) function.

Korean Patent Application No. 10-2008-0125712 (2008.12.11) filed by the present applicant is provided with a pedal simulator for forming a spring-tangling force between the pedal and the booster, and the hydraulic line to be opened and closed by an ECU-controlled hydraulic valve The configuration is connected to the simulator and oil reservoir.

The present invention has a configuration in which an on / off type hydraulic valve is installed between the pedal simulator and the oil reservoir in a hydraulic line for fail-safe implementation due to a booster failure. .

However, when applying a hydraulic valve controlled by an electrical signal, there is a burden on the safety degradation due to the failure of the valve itself (Fail), and also has a side that brings the cost of manufacturing according to the valve configuration.

In addition, the hydraulic pedal simulator requires layout for the hydraulic line, thereby providing a cause for the complexity of the actuator configuration.

Accordingly, the present invention has been invented in view of the above, and by forming the pedal simulator as a pneumatic type, it is possible to realize a pedal-like feeling such as hydraulic pressure, and to realize a fail-safe (Fail-Safe) in a more stable mechanical manner. It is an object of the present invention to provide a pneumatic fail-safe implementation mechanism of a braking device for braking.

In addition, an object of the present invention is to provide a pneumatic type fail-safe implement mechanism of a regenerative braking device that can be configured more simply with little change in design by forming a pedal simulator using a booster side vacuum. .

In order to achieve the above object, the present invention provides a spring reaction force between the pedal and the booster which forms an infinite power ratio, and the fail of the braking device for regenerative braking having a pedal simulator for fail-safe when the booster fails. In a safe implementation mechanism,

The pedal simulator includes an atmospheric pressure space, a housing block forming a vacuum pressure space for forming the booster side vacuum pressure, pushed in conjunction with the pedal to press the booster side, and to provide a spring reaction force toward the pedal. Characterized in that it comprises an operating unit installed toward the pneumatic space.

The housing block has a dual structure consisting of a chamber housing surrounding the inner housing in which the operating unit is installed, wherein the pressure reducing chamber is divided into a vacuum chamber in a vacuum pressure space with a diaphragm outside of the inner housing, and the vacuum The chamber is in communication with the inner housing,

 The actuating unit includes a stepping force response member including a moving rod extending from the pedal toward the booster through the housing block, and the inner housing through which the moving rod passes comprises at least one spring compressed and deformed by the pressing of the pedal. The atmospheric pressure space where the rod is located is composed of a return member consisting of at least one spring to support the foot response member.

Between the stepping reaction member and the return member, a damper for supporting both springs is fixed to the moving rod.

According to the present invention, since pedal implementation such as hydraulic pressure and fail-safe (Fail-Safe) is implemented as a pneumatic type pedal simulator, there is no fear of safety deterioration according to the electrical signal that may occur when using the valve.

The pedal simulator and booster are connected to each other, so there is little design change, and the simpler configuration also reduces the cost compared to the valve.

The pedal simulator and booster are connected to each other so that the vacuum is automatically activated when the booster side is released. Therefore, the cost can be reduced and the safety can be improved.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 is a block diagram of a pneumatic type regenerative braking actuator device according to the present invention.

As shown, the present invention has a booster (2) having an infinite power boost ratio type plunger valve (7), a pedal simulator that directly receives the operating force of the pedal (1) to the operation rod (3) of the booster (2) 10 is connected, the stroke of the pedal 1 is detected by the ECU 30, the various sensor signals are input using the pedal sensor.

In the present embodiment, the booster 2 has a reaction disk 7 positioned at a tip portion of the valve body 4, and the booster 2 is not directly in contact with the reaction disk 7 inside the valve body 4, thereby increasing infinity. It is comprised including the plunger valve 6 which generate | occur | produces rain.

The infinite power boost ratio of the plunger valve 6 is caused by being formed on the valve body 4 in the state in which the non-contact guider 5, which is an interval spaced between the reaction disk 7 and the plunger valve 6, is assembled. do.

The booster 2 as described above is the same as the booster of Korean Patent Application No. 10-2008-0125712 (2008.12.11) filed by the present applicant.

The pedal simulator 10 according to the present embodiment forms a pedal response following the hysteresis characteristic of hydraulic pressure by a spring elastic force, and simultaneously works with the booster 2 to diagnose failure of the booster 2. Implement fail-safe using pneumatic and atmospheric pressure.

The pedal simulator 10 has a housing block 11 which is partitioned in the atmospheric pressure space and shares the vacuum pressure toward the booster 2, and the inner housing 12 moves from the pedal 1 to the booster 2. The rod penetrates, and has a stepping force response member made of at least one or more springs which are deformed in compression according to the movement of the moving rod, and has a return member 19 for providing an initial position elastic return force.

In this embodiment, the housing block 11 has a double structure.

That is, the housing block 11 surrounds the inner housing 12 and the inner housing 12 having an empty space for penetrating the moving rod and accommodating at least one or more spring units, and the diaphragm 13c. The chamber housing 13 is divided into a vacuum chamber 13a and a transformer chamber 13b.

The vacuum chamber 13a is connected to the vacuum chamber a side of the booster 2 having the transformer chamber b to form a vacuum chamber A. The transformer chamber 13b communicates with atmospheric pressure to transform the transformer chamber B. Form.

In this embodiment, the inner housing 12 communicates with the vacuum chamber 13a side and shares the vacuum pressure toward the vacuum chamber 13a side.

The moving rod is connected to the pedal (1) side pedal rod (14) interlocked with the pedal (1), the booster rod (15) connected to the pedal rod (14) connected to the operation rod (3) side booster (15) ).

The stepping reaction member is a movement bracket 16 for pushing the booster rod 15 to the push of the pedal rod 14, and the compression deformation during the push of the moving bracket 16 to transfer the spring reaction force toward the pedal (1) The foot spring 17 and the damper 18 snap-fastened to the booster rod 15 in the inner housing 12 of the housing block 11 so that the foot spring 17 is elastically supported.

In the present embodiment, the step spring 17 is composed of at least one spring.

For example, the step spring (17) wraps the booster rod (15) and is fixed between the moving bracket 16 and the damper 18, the main spring (17a) and one side fixed to the moving bracket (16) The other side consists of free springs.

The sub-springs have first and second sub-springs 17b and 17c fixed to one side of the moving bracket 16 on both sides of the main spring 17a, compared to the main spring 17a located at the center of the moving bracket 16. ).

In the assembled state, the main spring 17a is assembled in a state in which both sides are elastically supported, while the first and second subsprings 17b and 17c are free from one side of the damper 18 at a predetermined distance. It is determined in consideration of the pedal reaction force implemented in the pedal simulator (10).

In the present embodiment, the return member 19 is located outside the inner housing 12 of the housing block 11 and constitutes a return spring that supports the damper 18 fixed to the booster rod 15.

The return spring is composed of at least one, and in this embodiment, the return springs include first and second return springs 19a and 19b located at both sides of the booster rod 15.

In this embodiment, the ECU 30 does not detect and determine a failure of the booster 2, which is a pedal simulator 10 in which a fail-safe implementation causes the vacuum degree to the booster 2 to be released. This is due to the automatic operation due to the change in pneumatic side.

2 shows a normal operation diagram for pedal depression of the pedal simulator according to the present invention.

As shown, when the booster 2 is in a normal state, the vacuum chamber 13a formed in the housing block 11 of the pedal simulator 10 receives the vacuum pressure Pa from the vacuum chamber a side of the booster 2. On the other hand, the transformer chamber 13b communicates with the atmospheric pressure to form the atmospheric pressure Pb.

In this state, when the pedal 1 is pressed and the pressing force Fa is transmitted to the moving bracket 16, the moving bracket 16 is moved according to the amount of pushing, that is, the depression amount toward the pedal 1, and the first spring 17a and the first. The two subsprings 17b and 17c are deformed at a time difference.

That is, when the pressing force Fa is not large, only the main spring 17a is compressed, so that the reaction force Fb transmitted to the pedal 1 side is transmitted only through the main spring 17a, while the push of the moving bracket 16 is increased by the pressing force Fa. If the amount is also increased, the main spring 17a is further compressed, and the reaction force Fb transmitted to the pedal 1 side is further increased.

The main spring 17a is further compressed, and the first and second subsprings 17b and 17c are deformed by contact with the damper 18, so that the reaction force transmitted to the pedal 1 is equal to the reaction force Fb of the main spring 17a. It is further increased through reaction force Fba of the first and second subsprings 17b and 17c.

This action is realized by supporting the front end portion of the damper 18 through the atmospheric pressure Pb due to the difference between the vacuum pressure Pa and the atmospheric pressure Pb.

As the amount of depression of the pedal 1 increases, the booster rod 15 pushes the damper 18 together and compresses the first and second return springs 19a and 19b while simultaneously pushing the operation rod 3. By operating the booster 2, a normal braking hydraulic pressure is produced in the master cylinder.

As described above, in the present embodiment, the pedal feeling felt by the driver is implemented in proportion to the increase in the amount of depression of the pedal 1 due to the compression deformation of the spring, and thus may be implemented as the hysteresis characteristic of hydraulic pressure.

3 shows a fail-safe operation diagram in case of booster failure according to the present invention.

As shown, since the booster 2 does not operate, the vacuum chamber 13a of the pedal simulator 10 forms the same pressure as the atmospheric pressure Pb toward the transformer chamber 13b.

When the pedal 1 is pressed and the pressing force Fa is transmitted to the moving bracket 16, the booster rod 15 is pushed together with the moving bracket 16, and the damper 18 is pushed together, which is combined with the vacuum pressure Pa. This is due to the same atmospheric pressure Pb.

This same pressure (Pb), after all, the front end portion of the damper 18 is not supported through the atmospheric pressure (Pb) acts to deliver to the booster (2) without consuming the pressing force of the pedal (1).

As the damper 18 is pushed as described above, the pressing force Fa of the pedal 1 is directly transmitted to the operation rod 3 through the booster rod 15, through which the booster 2 is forced to operate the master cylinder side. By doing so, it is possible to implement a fail-safe according to a failure of the booster 2.

The reaction force Fc of the first and second return springs 19a and 19b compression-deformed by the push of the damper 18 is transmitted to the pedal 1 side reaction force, and at the same time, it is added as a return force when the pedal 1 returns.

As described above, in the present embodiment, when the booster 2 fails, the spring 17a, 17b, 17c, 19a, 19b of the pedal simulator 10 is pressed to generate a braking force without consuming the pedal force of the human. It works to fully utilize the pedal power of the person.

In addition, the present embodiment is not operated by separately detecting the failure (Fail) of the booster 2, it is automatically operated in accordance with the release of the booster 2 side vacuum can reduce the cost and increase the safety.

1 is a block diagram of a pneumatic type fail-safe implementation mechanism of the regenerative braking device according to the present invention;

2 is a normal operation diagram for the pedal depression of the pedal simulator according to the present invention

3 is a fail-safe operation of the pedal simulator according to the present invention in case of booster failure.

    <Description of the symbols for the main parts of the drawings>

1: pedal 2: booster

3: operation rod 4: valve body

5: non-contact guider 6: plunger valve

7: reaction disc 10: pedal simulator

11: housing block 12: internal housing

13: chamber housing 13a: vacuum chamber

13b: transformer chamber 13c: diaphragm

14: Pedal Rod 15: Booster Rod

16: moving bracket 17: the step reaction member

17a: main spring 17b, 17c: first and second sub springs

18: damper 19: return member

19a, 19b: 1st and 2nd return spring

30: ECU

a, A: vacuum chamber b, B: transformer chamber

Claims (3)

In a fail-safe implementation mechanism of a regenerative braking device having a pedal simulator that provides a spring reaction force between a pedal and a booster that forms an infinite power ratio, and implements fail-safe in case of a booster failure. The pedal simulator includes an atmospheric pressure space, a housing block forming a vacuum pressure space for forming the booster side vacuum pressure, pushed in conjunction with the pedal to press the booster side, and to provide a spring reaction force toward the pedal. A pneumatic type fail-safe implement mechanism for a regenerative braking device comprising an operating part installed toward a pneumatic space. The method of claim 1, wherein the housing block has a dual structure consisting of a chamber housing surrounding the inner housing in which the operating unit is installed, the pressure chamber is a vacuum chamber which is a vacuum pressure space with a diaphragm outside the inner housing and the diaphragm; The vacuum chamber is in communication with the inner housing,  The actuating unit includes a stepping force response member including a moving rod extending from the pedal toward the booster through the housing block, and the inner housing through which the moving rod passes comprises at least one spring compressed and deformed by the pressing of the pedal. The pneumatic type fail-safe implement mechanism of the regenerative braking system, characterized in that the rod is located in the atmospheric pressure space is composed of a return member consisting of at least one spring to support the stepping force response member. The pneumatic type fail-safe implement mechanism of claim 2, wherein a damper supporting both springs is fixed to the moving rod between the stepping force response member and the return member.

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