1. An automotive electronic parking redundancy control system, comprising:

an electronic parking brake system;

the electric power-assisted braking system is in communication connection with the electronic parking braking system through a local area network, and when the electronic parking braking system breaks down, a parking fault signal is sent to the electric power-assisted braking system through the local area network, so that the electric power-assisted braking system controls the braking system to brake according to the parking fault signal.

2. The electronic parking redundancy control system of claim 1, wherein the electronic parking brake system comprises:

the parking brake system comprises a brake disc (1), parking brake calipers (2) nested outside the brake disc (1), a parking motor (3) connected with the parking brake calipers (2), a parking brake wire harness (4) connected with the parking motor (3) and an electronic parking controller connected with the parking brake wire harness (4);

the electronic parking controller receives a parking fault signal sent by the parking motor (3) through the parking brake wire harness (4) and sends the parking fault signal to the electric power-assisted brake system;

the parking fault signal is generated by the parking motor (3) when the parking brake caliper (2) cannot work or fails.

3. The electronic parking redundancy control system of claim 2, characterized in that said two parking brake calipers (2) are respectively arranged in two rear wheels of the vehicle.

4. The electronic parking redundancy control system of claim 3, wherein the electric power assisted brake system comprises:

the brake system comprises a brake caliper (5), a brake disc (1) nested in the brake caliper (5), a brake pipeline (6) connected with the brake caliper (5), a brake master cylinder (7) connected with the brake pipeline (6), a worm gear (8) connected with the brake master cylinder (7), a gear rack (9) connected with the worm gear (8), and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear (8);

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the turbine worm (8), the gear rack (9) and the brake master cylinder (7) to move, and the brake pipeline (6) is used for controlling the brake disc (1) to brake.

5. The electronic parking redundancy control system of claim 4, wherein said brake calipers (5) are four, respectively arranged in four wheels;

six brake discs (1) are respectively matched with the brake caliper (5) and the parking brake caliper (2) for use.

6. An automobile electronic parking redundancy control method is characterized by being applied to an electronic parking brake system and comprising the following steps:

when detecting that the electronic parking brake system has a fault, generating a parking fault signal;

and sending a parking fault signal to an electric power-assisted braking system through a local area network, so that the electric power-assisted braking system controls a braking system to brake according to the parking fault signal.

7. The electronic parking redundancy control method of an automobile according to claim 6, wherein the electronic parking brake system comprises:

the parking brake device comprises parking brake calipers (2) nested outside a brake disc (1), a parking motor (3) connected with the parking brake calipers (2), a parking brake wire harness (4) connected with the parking motor (3) and an electronic parking controller connected with the parking brake wire harness (4);

when detecting that electronic parking braking system breaks down, produce parking trouble signal, include:

the parking brake caliper (2) can not work or generates a parking fault signal by the parking motor (3) when a fault occurs;

and the electronic parking controller receives a parking fault signal sent by the parking motor (3) through the parking brake wire harness (4).

8. An automobile electronic parking redundancy control method is characterized by being applied to an electric power-assisted brake system and comprising the following steps:

receiving a parking fault signal sent by an electronic parking brake system through a local area network;

and controlling a braking system to brake according to the parking fault signal.

9. The electronic parking redundancy control method of claim 8, wherein the electric power assisted brake system comprises: the brake system comprises a brake caliper (5), a brake disc (1) nested in the brake caliper (5), a brake pipeline (6) connected with the brake caliper (5), a brake master cylinder (7) connected with the brake pipeline (6), a worm gear (8) connected with the brake master cylinder (7), a gear rack (9) connected with the worm gear (8), and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear (8);

the controlling a braking system to brake according to the parking fault signal comprises:

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the turbine worm (8), the gear rack (9) and the brake master cylinder (7) to move, and the brake of the brake disc (1) is realized through the brake pipeline (6).

10. An automobile includes an electronic parking brake system; it is characterized by also comprising:

an electric power-assisted braking system in communication with the electronic parking braking system via a local area network;

wherein, the electric power assisted brake system includes: the brake system comprises a brake caliper (5), a brake disc (1) nested in the brake caliper (5), a brake pipeline (6) connected with the brake caliper (5), a brake master cylinder (7) connected with the brake pipeline (6), a worm gear (8) connected with the brake master cylinder (7), a gear rack (9) connected with the worm gear (8), and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear (8);

when the electronic parking brake system breaks down, a parking fault signal is sent to the electric power-assisted brake system through a local area network, so that the electric power-assisted brake system controls the brake system to brake according to the parking fault signal.

Background

According to the regulations of the national standard GB 21670-2008 passenger vehicle brake system technical requirements and test method, when a line fault occurs in the electronic parking brake system or the control device fails, the parking brake system can still perform parking brake at the position of a driver, and the driver can fully park on a slope with the gradient of 8% or more. In order to meet the national standard, the conventional parking brake control and parking gear control form an electronic parking redundancy control system together. When the parking brake control fails, the park gear control can still ensure that the vehicle is normally parked on a slope. Since this method requires additional vehicle parking systems, this results in a certain material loading cost and occupies a part of the installation space.

Disclosure of Invention

The embodiment of the invention provides an automobile electronic parking redundancy control system and method and an automobile, and aims to solve the problems that a parking gear system needs to be additionally configured on the automobile, certain material loading cost is increased, and a part of installation space is occupied in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

the embodiment of the invention provides an automobile electronic parking redundancy control system, which comprises:

an electronic parking brake system;

the electric power-assisted braking system is in communication connection with the electronic parking braking system through a local area network, and when the electronic parking braking system breaks down, a parking fault signal is sent to the electric power-assisted braking system through the local area network, so that the electric power-assisted braking system controls the braking system to brake according to the parking fault signal.

Further, the electronic parking brake system includes:

the parking brake system comprises a brake disc, parking brake calipers nested outside the brake disc, a parking motor connected with the parking brake calipers, a parking brake wire harness connected with the parking motor and an electronic parking controller connected with the parking brake wire harness;

the electronic parking controller receives a parking fault signal sent by the parking motor through the parking brake wire harness and sends the parking fault signal to the electric power-assisted brake system;

the parking fault signal is generated by the parking motor when the parking brake caliper cannot work or fails.

Furthermore, the number of the parking brake calipers is two, and the two parking brake calipers are respectively arranged in two rear wheels of an automobile.

Further, the electric power-assisted brake system includes:

the brake system comprises a brake caliper, a brake disc embedded in the brake caliper, a brake pipeline connected with the brake caliper, a brake master cylinder connected with the brake pipeline, a turbine worm connected with the brake master cylinder, a gear rack connected with the turbine worm, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the turbine worm;

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, and the electric power-assisted brake motor sequentially drives the turbine worm, the gear rack and the brake master cylinder to move and controls the brake disc to brake through the brake pipeline.

Further, the number of the brake calipers is four, and the four brake calipers are respectively arranged in four wheels;

six brake discs are arranged and are respectively matched with the brake caliper and the parking brake caliper for use.

The embodiment of the invention also provides an automobile electronic parking redundancy control method, which is applied to an electronic parking braking system and comprises the following steps:

when detecting that the electronic parking brake system has a fault, generating a parking fault signal;

and sending a parking fault signal to an electric power-assisted braking system through a local area network, so that the electric power-assisted braking system controls a braking system to brake according to the parking fault signal.

Further, the electronic parking brake system includes:

the parking brake device comprises parking brake calipers nested outside a brake disc, a parking motor connected with the parking brake calipers, a parking brake wire harness connected with the parking motor and an electronic parking controller connected with the parking brake wire harness;

when detecting that electronic parking braking system breaks down, produce parking trouble signal, include:

the parking brake caliper generates a parking fault signal when the parking brake caliper cannot work or fails;

and the electronic parking controller receives a parking fault signal sent by the parking motor through the parking brake wire harness.

The embodiment of the invention also provides an automobile electronic parking redundancy control method, which is applied to an electric power-assisted braking system and comprises the following steps:

receiving a parking fault signal sent by an electronic parking brake system through a local area network;

and controlling a braking system to brake according to the parking fault signal.

Further, the electric power assisted brake system includes: the brake system comprises a brake caliper, a brake disc embedded in the brake caliper, a brake pipeline connected with the brake caliper, a brake master cylinder connected with the brake pipeline, a turbine worm connected with the brake master cylinder, a gear rack connected with the turbine worm, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the turbine worm;

the controlling a braking system to brake according to the parking fault signal comprises:

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the turbine worm, the gear rack and the brake master cylinder to move, and the brake of the brake disc is realized through the brake pipeline.

The embodiment of the invention also provides an automobile, which comprises an electronic parking braking system; further comprising:

an electric power-assisted braking system in communication with the electronic parking braking system via a local area network;

wherein, the electric power assisted brake system includes: the brake system comprises a brake caliper, a brake disc embedded in the brake caliper, a brake pipeline connected with the brake caliper, a brake master cylinder connected with the brake pipeline, a turbine worm connected with the brake master cylinder, a gear rack connected with the turbine worm, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the turbine worm;

when the electronic parking brake system breaks down, a parking fault signal is sent to the electric power-assisted brake system through a local area network, so that the electric power-assisted brake system controls the brake system to brake according to the parking fault signal.

The invention has the beneficial effects that:

in order to solve the problems of cost and space caused by the configuration of a parking gear system, the embodiment of the invention mainly uses an electronic parking braking system and uses the existing electric braking power-assisted system on a vehicle as a backup parking system. In order to enable the electric brake boosting system to take over to execute parking when the electric parking brake fails, the electric brake boosting system needs to perform fault diagnosis and sends a fault diagnosis result to the electric brake boosting system in a fault information mode, the electric brake boosting system drives a boosting motor to rotate and work, a brake push rod is pushed through a worm gear mechanism, a brake master cylinder piston is further pushed, and brake fluid pressurization and whole vehicle braking are finally achieved. The invention avoids specially configuring a parking gear control system, can realize parking redundancy control by means of the existing electric power-assisted brake system, saves the material cost of loading, avoids the parking gear mechanism from occupying the arrangement space, and improves the reliability of safe and accurate parking of the vehicle.

Drawings

FIG. 1 is a schematic diagram of an electronic parking redundancy control system of an automobile according to an embodiment of the invention;

FIG. 2 is a schematic step diagram of an electronic parking redundancy control method for a vehicle according to an embodiment of the invention;

FIG. 3 is a schematic step diagram illustrating another electronic parking redundancy control method for a vehicle according to an embodiment of the present invention;

FIG. 4 is a logic diagram of an electronic parking redundancy control method for a vehicle according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The invention provides an electronic parking redundancy control system and method for an automobile and the automobile, aiming at the problems that in the prior art, a parking gear system needs to be additionally arranged on the automobile, certain material loading cost is increased, and a part of installation space is occupied.

The embodiment of the invention provides an automobile electronic parking redundancy control system, which comprises:

an electronic parking brake system;

the electric power-assisted braking system is in communication connection with the electronic parking braking system through a local area network, and when the electronic parking braking system breaks down, a parking fault signal is sent to the electric power-assisted braking system through the local area network, so that the electric power-assisted braking system controls the braking system to brake according to the parking fault signal.

The electronic parking brake system is taken as a main part, and the existing electric brake power-assisted system on the vehicle is taken as a backup parking system. In order to enable the electric brake boosting system to take over to execute parking when the electric parking brake fails, the electric brake boosting system needs to perform fault diagnosis and sends a fault diagnosis result to the electric brake boosting system in a fault information mode, the electric brake boosting system drives a boosting motor to rotate and work, a brake push rod is pushed through a worm gear mechanism, a brake master cylinder piston is further pushed, and brake fluid pressurization and whole vehicle braking are finally achieved. The invention avoids specially configuring a parking gear control system, can realize parking redundancy control by means of the existing electric power-assisted brake system, saves the material cost of loading, avoids the parking gear mechanism from occupying the arrangement space, and improves the reliability of safe and accurate parking of the vehicle.

As shown in fig. 1, the electronic parking brake system includes:

the parking brake system comprises a brake disc 1, parking brake calipers 2 nested outside the brake disc 1, a parking motor 3 connected with the parking brake calipers 2, a parking brake wire harness 4 connected with the parking motor 3 and an electronic parking controller connected with the parking brake wire harness 4;

the electronic parking controller receives a parking fault signal sent by the parking motor 3 through the parking brake wire harness 4 and sends the parking fault signal to the electric power-assisted brake system;

the parking fault signal is generated by the parking motor 3 when the parking brake caliper 2 fails to work or fails.

For example, when the automobile has a parking fault, that is, the parking brake caliper 2 cannot work or fails, the parking motor 3 generates a parking fault signal, and then sends the parking fault signal to the electronic parking controller through the parking brake harness 4, and then the electronic parking controller sends the parking fault signal to the electric power-assisted brake system through the controller local area network 10.

Optionally, the number of the parking brake calipers 2 is two, and the two parking brake calipers are respectively arranged in two rear wheels of the automobile.

For example, in general, the parking brake caliper 2 is provided on two rear wheels.

Optionally, the electric power assisted brake system comprises:

the brake system comprises a brake caliper 5, a brake disc 1 nested in the brake caliper 5, a brake pipeline 6 connected with the brake caliper 5, a brake master cylinder 7 connected with the brake pipeline 6, a worm gear 8 connected with the brake master cylinder 7, a gear rack 9 connected with the worm gear 8, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear 8;

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the turbine worm 8, the gear rack 9 and the brake master cylinder 7 to move, and the brake pipeline 6 controls the brake disc 1 to brake.

For example, after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the worm gear 8, the rack and pinion 9 and the brake master cylinder 7 to move forwards, and brake of four brake discs 1 of the whole vehicle is realized by establishing brake hydraulic pressure in the brake pipeline 6, so that the vehicle is prevented from sliding.

Optionally, there are four brake calipers 5, respectively arranged in four wheels;

six brake discs 1 are respectively matched with the brake caliper 5 and the parking brake caliper 2.

For example, the brake of the electronic parking brake system is performed by clamping the brake disc 1 by the brake caliper 5, and the brake of the electric power-assisted brake system is performed by clamping the brake disc 1 by the brake caliper 2.

The electronic parking brake system is taken as a main part, and the existing electric brake power-assisted system on the vehicle is taken as a backup parking system. In order to enable the electric brake boosting system to take over to execute parking when the electric parking brake fails, the electric brake boosting system needs to perform fault diagnosis and sends a fault diagnosis result to the electric brake boosting system in a fault information mode, the electric brake boosting system drives a boosting motor to rotate and work, a brake push rod is pushed through a worm gear mechanism, a brake master cylinder piston is further pushed, and brake fluid pressurization and whole vehicle braking are finally achieved. The invention avoids specially configuring a parking gear control system, can realize parking redundancy control by means of the existing electric power-assisted brake system, saves the material cost of loading, avoids the parking gear mechanism from occupying the arrangement space, and improves the reliability of safe and accurate parking of the vehicle.

As shown in fig. 2, an embodiment of the present invention further provides an electronic parking redundancy control method for an automobile, which is applied to the electronic parking brake system described above, and includes:

step 21, generating a parking fault signal when detecting that the electronic parking brake system has a fault;

and step 22, sending a parking fault signal to an electric power-assisted brake system through a local area network, so that the electric power-assisted brake system controls a brake system to brake according to the parking fault signal.

Here, when the automobile has a parking fault, that is, the parking brake caliper 2 cannot work or has a fault, the parking motor 3 generates a parking fault signal, and then sends the parking fault signal to the electronic parking controller through the parking brake harness 4, and then the electronic parking controller sends the parking fault signal to the electric power-assisted brake system through the controller local area network 10, so that the electric power-assisted brake system controls the brake caliper 5 to brake according to the parking fault signal.

Optionally, the electronic parking brake system comprises:

the parking brake device comprises parking brake calipers 2 nested outside a brake disc 1, a parking motor 3 connected with the parking brake calipers 2, a parking brake wire harness 4 connected with the parking motor 3 and an electronic parking controller connected with the parking brake wire harness 4;

when detecting that electronic parking braking system breaks down, produce parking trouble signal, include:

the parking brake caliper 2 generates a parking fault signal by the parking motor 3 when the parking brake caliper cannot work or fails;

and the electronic parking controller receives a parking fault signal sent by the parking motor 3 through the parking brake wire harness 4.

It should be noted that, when the parking fault occurs in the automobile, that is, the parking brake caliper 2 cannot work or fails, the parking motor 3 generates a parking fault signal, and then sends the parking fault signal to the electronic parking controller through the parking brake harness 4, and then the electronic parking controller sends the parking fault signal to the electric power-assisted brake system through the controller local area network 10, so that the electric power-assisted brake system controls the brake caliper 5 to brake according to the parking fault signal.

As shown in fig. 3, an embodiment of the present invention further provides an electronic parking redundancy control method for an automobile, which is applied to the electric power-assisted brake system described above, and includes:

step 31, receiving a parking fault signal sent by an electronic parking brake system through a local area network;

and step 32, controlling a brake system to brake according to the parking fault signal.

The electronic parking brake system is taken as a main part, and the existing electric brake power-assisted system on the vehicle is taken as a backup parking system. In order to enable the electric brake boosting system to take over to execute parking when the electric parking brake fails, the electric brake boosting system needs to perform fault diagnosis and sends a fault diagnosis result to the electric brake boosting system in a fault information mode, the electric brake boosting system drives a boosting motor to rotate and work, a brake push rod is pushed through a worm gear mechanism, a brake master cylinder piston is further pushed, and brake fluid pressurization and whole vehicle braking are finally achieved. The invention avoids specially configuring a parking gear control system, can realize parking redundancy control by means of the existing electric power-assisted brake system, saves the material cost of loading, avoids the parking gear mechanism from occupying the arrangement space, and improves the reliability of safe and accurate parking of the vehicle.

Optionally, the electric power assisted brake system comprises: the brake system comprises a brake caliper 5, a brake disc 1 nested in the brake caliper 5, a brake pipeline 6 connected with the brake caliper 5, a brake master cylinder 7 connected with the brake pipeline 6, a worm gear 8 connected with the brake master cylinder 7, a gear rack 9 connected with the worm gear 8, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear 8;

the controlling a braking system to brake according to the parking fault signal comprises:

after the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system, the electric power-assisted brake controller controls the electric power-assisted brake motor to operate, the electric power-assisted brake motor sequentially drives the turbine worm 8, the gear rack 9 and the brake master cylinder 7 to move, and the brake of the brake disc 1 is realized through the brake pipeline 6.

When all parts of the electronic parking brake system can work normally, the parking of the whole vehicle is completed independently by the electronic parking brake system, and the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system; when the parking of the whole vehicle is failed by an electronic parking brake system, namely the parking brake caliper 2 cannot work or fails, a parking fault signal is generated by a parking motor 3 and then is sent to an electronic parking controller through a parking brake wire harness 4, and then the electronic parking controller sends the parking fault signal to the electric power-assisted brake system through a controller local area network 10; the electric power-assisted brake controller controls the operation of an electric power-assisted brake motor, the electric power-assisted brake motor sequentially drives a turbine worm 8, a gear rack 9 and a brake master cylinder 7 to move forwards, and brake of four brake discs 1 of the whole vehicle is realized by establishing brake hydraulic pressure in a brake pipeline 6, so that the vehicle is prevented from sliding.

The specific implementation steps of the automobile electronic parking redundancy control method provided by the embodiment of the invention are shown in fig. 4, when all parts of an electronic parking brake system can work normally, the parking of the whole automobile is independently completed by the electronic parking brake system, and a signal capable of parking normally is sent to an electric power-assisted brake system through the communication of a controller local area network 10 without the intervention of the electric power-assisted brake system; when the electronic parking brake system breaks down, namely the parking motor cannot be actuated to clamp two wheels of a rear axle for parking in response to the requirement of a user, the electronic parking brake system sends a fault state signal to the electric power-assisted brake system through the communication of the controller local area network 10 to inform that the electric power-assisted brake system cannot complete parking, and after the electric power-assisted brake system receives the signal that the electric parking brake system breaks down, the brake system is controlled to brake to complete parking.

The embodiment of the invention also provides an automobile, which comprises an electronic parking braking system; further comprising:

an electric power-assisted braking system in communication with the electronic parking braking system via a local area network;

wherein, the electric power assisted brake system includes: the brake system comprises a brake caliper 5, a brake disc 1 nested in the brake caliper 5, a brake pipeline 6 connected with the brake caliper 5, a brake master cylinder 7 connected with the brake pipeline 6, a worm gear 8 connected with the brake master cylinder 7, a gear rack 9 connected with the worm gear 8, and an electric power-assisted brake controller and an electric power-assisted brake motor connected with the worm gear 8;

when the electronic parking brake system breaks down, a parking fault signal is sent to the electric power-assisted brake system through a local area network, so that the electric power-assisted brake system controls the brake system to brake according to the parking fault signal.

When all parts of the electronic parking brake system can work normally, parking of the whole vehicle is completed independently by the electronic parking brake system, and the electric power-assisted brake system receives a parking fault signal sent by the electronic parking brake system; when the parking of the whole vehicle is failed by an electronic parking brake system, namely the parking brake caliper 2 cannot work or fails, a parking fault signal is generated by a parking motor 3 and then is sent to an electronic parking controller through a parking brake wire harness 4, and then the electronic parking controller sends the parking fault signal to the electric power-assisted brake system through a controller local area network 10; the electric power-assisted brake controller controls the operation of an electric power-assisted brake motor, the electric power-assisted brake motor sequentially drives a turbine worm 8, a gear rack 9 and a brake master cylinder 7 to move forwards, and brake of four brake discs 1 of the whole vehicle is realized by establishing brake hydraulic pressure in a brake pipeline 6, so that the vehicle is prevented from sliding.

The electronic parking brake system is taken as a main part, and the existing electric brake power-assisted system on the vehicle is taken as a backup parking system. In order to enable the electric brake boosting system to take over to execute parking when the electric parking brake fails, the electric brake boosting system needs to perform fault diagnosis and sends a fault diagnosis result to the electric brake boosting system in a fault information mode, the electric brake boosting system drives a boosting motor to rotate and work, a brake push rod is pushed through a worm gear mechanism, a brake master cylinder piston is further pushed, and brake fluid pressurization and whole vehicle braking are finally achieved. The invention avoids specially configuring a parking gear control system, can realize parking redundancy control by means of the existing electric power-assisted brake system, saves the material cost of loading, avoids the parking gear mechanism from occupying the arrangement space, and improves the reliability of safe and accurate parking of the vehicle.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.