阅读说明：本技术 一种驻车制动解除装置、解除方法及车辆 (Parking brake release device, parking brake release method and vehicle ) 是由 郭伟 胡圣万 龙雪辉 于金国 李雪琦 于 2021-08-31 设计创作，主要内容包括：本申请公开了一种驻车制动解除装置、解除方法及车辆,涉及车辆制动控制技术领域,该装置包括：主驻车回路,其包括依次连通的空压机、驻车贮气筒、手控阀和弹簧制动气室；备用驻车回路,其包括依次连通的辅助贮气筒、压差单向阀、备用贮气筒和双向单通阀,辅助贮气筒连通空压机的出气口,双向单通阀的一个进气口连通驻车贮气筒,双向单通阀的出气口连通手控阀；压差单向阀用于在备用贮气筒充气时,控制备用贮气筒的压力小于辅助贮气筒的压力；驻车贮气筒用于手控阀松开后,对弹簧制动气室进行充气,以驻车释放；备用贮气筒用于在主驻车回路失效时进行驻车释放。本申请,不论主驻车回路是否失效,均可保证车辆快速解除驻车,以缩短车辆起步时间。(The application discloses parking braking removes device, removes method and vehicle relates to vehicle braking control technical field, and the device includes: the main parking loop comprises an air compressor, a parking air cylinder, a manual valve and a spring brake air chamber which are sequentially communicated; the standby parking loop comprises an auxiliary air tank, a differential pressure one-way valve, a standby air tank and a two-way one-way valve which are sequentially communicated, wherein the auxiliary air tank is communicated with an air outlet of the air compressor, one air inlet of the two-way one-way valve is communicated with the parking air tank, and the air outlet of the two-way one-way valve is communicated with the manual valve; the differential pressure one-way valve is used for controlling the pressure of the standby air tank to be smaller than that of the auxiliary air tank when the standby air tank is inflated; the parking air cylinder is used for inflating the spring brake air chamber after the manual control valve is loosened so as to release in parking; the reserve air reservoir is used for parking release in the event of failure of the primary parking circuit. This application, whether the main parking return circuit is invalid or not, can guarantee that the vehicle removes the parking fast to shorten vehicle start time.)

1. A parking brake release device, characterized by comprising:

the parking system comprises a main parking loop, a parking air cylinder, a manual valve and a spring brake air chamber, wherein the main parking loop comprises an air compressor (1), a parking air cylinder (2), the manual valve (3) and the spring brake air chamber (4) which are communicated in sequence;

the standby parking loop comprises an auxiliary air cylinder (5), a differential pressure one-way valve (6), a standby air cylinder (7) and a two-way one-way valve (8) which are sequentially communicated, wherein the auxiliary air cylinder (5) is communicated with an air outlet of the air compressor (1), one air inlet of the two-way one-way valve (8) is communicated with the parking air cylinder (2), and the air outlet of the two-way one-way valve (8) is communicated with the manual valve (3);

the differential pressure one-way valve (6) is used for controlling the pressure of the spare gas cylinder (7) to be smaller than the pressure of the auxiliary gas cylinder (5) when the spare gas cylinder (7) is inflated;

the parking air cylinder (2) is used for inflating the spring brake air chamber (4) after the manual valve (3) is loosened so as to release the parking;

the reserve gas cartridge (7) is used for parking release in the event of failure of the primary parking circuit.

2. The parking brake release device according to claim 1, characterized in that: the differential pressure one-way valve (6) is used for controlling the differential pressure between the auxiliary gas cylinder (5) and the spare gas cylinder (7) to be greater than or equal to a differential pressure threshold value;

the pressure difference threshold value is larger than or equal to the pressure reduced when the parking gas cylinder (2) completes the inflation of the spring brake chamber (4) once.

3. The parking brake release device according to claim 1, characterized in that: and the air outlet of the air compressor (1) is communicated with the air inlet of a multi-loop protection valve (9), and two air outlets of the multi-loop protection valve (9) are respectively communicated with the parking air cylinder (2) and the auxiliary air cylinder (5).

4. The parking brake release device according to claim 3, characterized in that: an air dryer (10) is arranged between the air compressor (1) and the multi-loop protection valve (9), and the air dryer (10) is used for dehumidifying and drying air entering the air dryer.

5. The parking brake release device according to claim 3, characterized in that: the multi-loop protection valve (9) is a four-loop protection valve.

6. The parking brake release device according to claim 5, characterized in that: and the other two air outlets of the four-circuit protection valve are respectively communicated with the front axle brake circuit and the rear axle brake circuit.

7. The parking brake release device according to claim 1, characterized in that: the two spring brake air chambers (4) are connected with a relay valve (11) between the two spring brake air chambers (4), the air outlet of the two-way one-way valve (8) is communicated with the two spring brake air chambers (4) through the relay valve (11), and the air outlet of the manual control valve (3) is communicated with a control port of the relay valve (11).

8. The parking brake release device according to claim 1, characterized in that: the two spring brake air chambers (4) are connected with a quick release valve between the two spring brake air chambers (4), the air outlet of the two-way one-way valve (8) is communicated with the two spring brake air chambers (4) through the quick release valve, and the air outlet of the manual control valve (3) is communicated with the air inlet of the quick release valve.

9. A releasing method of the parking brake releasing apparatus according to claim 1, characterized by comprising the steps of:

when the manual valve (3) is loosened and the main parking loop is not in fault, the parking air cylinder (2) inflates the spring brake air chamber (4) to release in parking;

when the manual valve (3) is released and the main parking loop is in fault, the spare air cylinder (7) inflates the spring brake air chamber (4) to release the parking.

10. A vehicle characterized by comprising the parking brake release device according to any one of claims 1 to 8.

Technical Field

The application relates to the technical field of vehicle brake control, in particular to a parking brake release device, a parking brake release method and a vehicle.

Background

With the higher and higher requirements on the safety performance of travel tools, the requirements on the safety performance of a vehicle brake system are more and more strict. At present, vehicles adopting pneumatic braking generally apply spring braking as parking braking.

In the normal running process of the vehicle, high-pressure gas is filled into the spring brake air chamber through the parking air cylinder, so that the spring is in a compressed state, the brake push rod returns, and the parking brake does not work; when the vehicle needs to be parked when the vehicle is parked, the hand control valve handle in the cab can be pulled up, high-pressure gas in the spring braking air chamber is exhausted, the braking push rod is pushed out, and the vehicle is parked by pushing the braking adjusting arm. If the vehicle needs to be restarted, the handle of the manual control valve is put down, high-pressure gas is used for inflating the spring brake chamber parking cavity through the parking gas cylinder, the spring is compressed, the brake push rod retracts, and parking brake is released.

However, when the parking air cylinder leaks or breaks or the pipeline leaks or breaks, the parking loop cannot build air pressure, the parking of the vehicle cannot be released, and particularly for special vehicles such as military vehicles and the like, the current parking releasing system cannot meet the requirements under the condition that the vehicle can be quickly started under the abnormal working condition.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a parking brake release apparatus, a parking brake release method and a vehicle, so as to solve the problem in the related art that the parking brake cannot be released when a parking gas cartridge fails.

The present application in a first aspect provides a parking brake release device, comprising:

the main parking loop comprises an air compressor, a parking air cylinder, a manual valve and a spring brake air chamber which are sequentially communicated;

the standby parking loop comprises an auxiliary air cylinder, a differential pressure one-way valve, a standby air cylinder and a two-way one-way valve which are sequentially communicated, wherein the auxiliary air cylinder is communicated with an air outlet of the air compressor, one air inlet of the two-way one-way valve is communicated with the parking air cylinder, and the air outlet of the two-way one-way valve is communicated with a manual control valve;

the differential pressure one-way valve is used for controlling the pressure of the spare air cylinder to be smaller than that of the auxiliary air cylinder when the spare air cylinder is inflated;

the parking air cylinder is used for inflating the spring brake air chamber after the manual control valve is loosened so as to release in parking;

the reserve gas cartridge is used to provide a park release in the event of failure of the primary park circuit.

In some embodiments, the differential pressure check valve is configured to control the differential pressure between the auxiliary gas cartridge and the reserve gas cartridge to be greater than or equal to a differential pressure threshold;

the pressure difference threshold is larger than or equal to the pressure reduced when the spring brake chamber is completely inflated by the parking air cylinder once.

In some embodiments, the air outlet of the air compressor is communicated with the air inlet of a multi-loop protection valve, and two air outlets of the multi-loop protection valve are respectively communicated with the parking air cylinder and the auxiliary air cylinder.

In some embodiments, an air dryer is disposed between the air compressor and the multi-circuit protection valve, and the air dryer is configured to dehumidify and dry air entering the air dryer.

In some embodiments, the multi-circuit protection valve is a four-circuit protection valve.

In some embodiments, the other two air outlets of the four-circuit protection valve are respectively communicated with the front axle brake circuit and the rear axle brake circuit.

In some embodiments, two spring brake air chambers are provided, and a relay valve is connected between the two spring brake air chambers, the air outlet of the two-way one-way valve is also respectively communicated with the two spring brake air chambers through the relay valve, and the air outlet of the manual valve is communicated with the control port of the relay valve.

In some embodiments, two spring brake air chambers are provided, and a quick release valve is connected between the two spring brake air chambers, the air outlet of the two-way one-way valve is further communicated with the two spring brake air chambers through the quick release valve, and the air outlet of the manual valve is communicated with the air inlet of the quick release valve.

The second aspect of the present application provides a releasing method based on the parking brake releasing device, which includes the steps of:

when the manual valve is loosened and the main parking loop has no fault, the parking air cylinder inflates the spring brake air chamber to release in parking;

when the manual valve is released and the main parking loop has a fault, the spare air cylinder inflates the spring brake air chamber to release the parking.

A third aspect of the present application provides a vehicle including the parking brake release device described above, the parking brake release device including:

the main parking loop comprises an air compressor, a parking air cylinder, a manual valve and a spring brake air chamber which are sequentially communicated;

the standby parking loop comprises an auxiliary air cylinder, a differential pressure one-way valve, a standby air cylinder and a two-way one-way valve which are sequentially communicated, wherein the auxiliary air cylinder is communicated with an air outlet of the air compressor, one air inlet of the two-way one-way valve is communicated with the parking air cylinder, and the air outlet of the two-way one-way valve is communicated with a manual control valve;

the differential pressure one-way valve is used for controlling the pressure of the spare air cylinder to be smaller than that of the auxiliary air cylinder when the spare air cylinder is inflated;

the parking air cylinder is used for inflating the spring brake air chamber after the manual control valve is loosened so as to release in parking;

the reserve gas cartridge is used to provide a park release in the event of failure of the primary park circuit.

The beneficial effect that technical scheme that this application provided brought includes:

according to the parking brake release device, the parking brake release method and the vehicle, the main parking loop comprises the air compressor, the parking air cylinder, the manual control valve and the spring brake air chamber which are sequentially communicated, the standby parking loop comprises the auxiliary air cylinder, the differential pressure one-way valve, the standby air cylinder and the bidirectional one-way valve which are sequentially communicated, and when the standby air cylinder is inflated, the differential pressure one-way valve controls the pressure of the standby air cylinder to be smaller than that of the auxiliary air cylinder; when the main parking loop has no fault, the spring brake air chamber is inflated by the parking air cylinder after the manual valve is released so as to release the parking; when the main parking loop fails, the spare air storage cylinder inflates the spring brake air chamber after the manual valve is released, and parking release is carried out; therefore, whether the main parking loop is invalid or not can ensure that the vehicle can be quickly released from parking, so that the starting time of the vehicle can be shortened.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view showing the connection of a parking brake release device according to an embodiment of the present application;

fig. 2 is a flowchart of a parking brake release method in the embodiment of the present application.

Reference numerals:

1. an air compressor; 2. parking the air reservoir; 3. a manual valve; 4. a spring brake chamber; 5. an auxiliary gas reservoir; 6. a differential pressure check valve; 7. a spare air reservoir; 8. a two-way one-way valve; 9. a multi-circuit protection valve; 10. an air dryer; 11. a relay valve; 12. a front brake air reservoir; 13. a front axle relay valve; 14. a foot brake valve; 15. a front axle brake chamber; 16. a rear brake air reservoir; 17. a rear axle relay valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the application provides a parking brake release device, which can solve the problem that the parking of a vehicle cannot be released when a parking air cylinder fails in the related art.

As shown in fig. 1, the parking brake release device of the present embodiment, which is used for post-parking release using spring braking, includes a main parking circuit and a backup parking circuit.

The main parking loop comprises an air compressor 1, a parking air cylinder 2, a manual control valve 3 and a spring brake air chamber 4 which are communicated in sequence. Wherein, the air outlet of the air compressor 1 is communicated with the air inlet of the parking air storage cylinder 2, and the air outlet of the parking air storage cylinder 2 is communicated with the air inlet of the manual control valve 3.

The standby parking loop comprises an auxiliary air cylinder 5, a differential pressure one-way valve 6, a standby air cylinder 7 and a two-way one-way valve 8 which are communicated in sequence. Wherein, the two-way one-way valve 8 comprises two air inlets and one air outlet.

The air outlet of the auxiliary air cylinder 5 is communicated with the air inlet of a differential pressure one-way valve 6, the air outlet of the differential pressure one-way valve 6 is communicated with the air inlet of a spare air cylinder 7, and the air outlet of the spare air cylinder 7 is communicated with one air inlet of a two-way one-way valve 8.

The air inlet of the auxiliary air cylinder 5 is also communicated with the air outlet of the air compressor 1, the other air inlet of the two-way one-way valve 8 is communicated with the air outlet of the parking air cylinder 2, and the air outlet of the two-way one-way valve 8 is communicated with the manual control valve 3.

In this embodiment, the differential pressure check valve 6 is used for controlling the pressure of the reserve air tank 7 to be lower than the pressure of the auxiliary air tank 5 when the reserve air tank 7 is inflated; the parking air cylinder 2 is used for inflating the spring brake air chamber 4 after the manual control valve 3 is loosened so as to release the parking; the reserve air tank 7 is used to inflate the spring brake chamber 4 when the main parking circuit fails, and to release the parking.

The parking brake release device comprises a main parking loop, a standby parking loop and a brake release mechanism, wherein the main parking loop comprises an air compressor, a parking air cylinder, a manual control valve and a spring brake air chamber which are sequentially communicated; when the main parking loop has no fault, the spring brake air chamber is inflated by the parking air cylinder after the manual valve is released so as to release the parking; when the main parking loop fails, the spare air storage cylinder inflates the spring brake air chamber after the manual valve is released, and parking release is carried out; therefore, whether the main parking loop is invalid or not can ensure that the vehicle can be quickly released from parking, so that the starting time of the vehicle can be shortened.

On the basis of the above embodiment, in the present embodiment, the differential pressure check valve 6 is used for controlling the differential pressure between the auxiliary gas cylinder 5 and the reserve gas cylinder 7 to be greater than or equal to a differential pressure threshold value;

the pressure difference threshold is greater than or equal to the pressure that is reduced when the spring brake chamber 4 is completely inflated by the parking gas cartridge 2 once.

In the embodiment, by controlling the pressure difference between the auxiliary air reservoir 5 and the reserve air reservoir 7 to be greater than or equal to the pressure reduced when the parking air reservoir 2 completes the inflation of the spring brake air chamber 4 once, the reserve air reservoir 7 does not inflate the spring brake air chamber 4 during the inflation of the parking air reservoir 2 to the spring brake air chamber 4, so as to maintain the air pressure in the reserve air reservoir 7.

In this embodiment, the pressure difference threshold value may be set reasonably according to the vehicle type and the actual application. Alternatively, the pressure difference threshold is equal to the pressure reduced by the spring brake chamber 4 when the parking gas cartridge 2 completes its single inflation, and the pressure difference check valve 6 controls the pressure difference between the auxiliary gas cartridge 5 and the reserve gas cartridge 7 to be greater than the pressure difference threshold.

In other embodiments, the pressure difference threshold may be equal to twice the pressure drop of the spring brake chamber 4 upon a single inflation of the spring brake chamber 4 by the parking gas cartridge 2, and in this case, the pressure difference check valve 6 may control the pressure difference between the auxiliary gas cartridge 5 and the reserve gas cartridge 7 to be equal to the pressure difference threshold, i.e. the pressure difference between the auxiliary gas cartridge 5 and the reserve gas cartridge 7 is twice the pressure drop of the spring brake chamber 4 upon a single inflation of the spring brake chamber 4 by the parking gas cartridge 2.

In other embodiments, if the vehicle consumes too much air and the pressure in the parking air cylinder 2 is lower than the pressure in the spare air cylinder 7, the spring brake air chamber 4 can be inflated by the spare air cylinder 7. In this embodiment, the pressure of the reserve air tank 7 can be quickly restored with the inflation of the air compressor 1.

In this embodiment, in a normal driving state of the vehicle, along with the operation of the air compressor 1, the parking air reservoir 2 and the auxiliary air reservoir 5 are both filled with high-pressure air, and further, the spare air reservoir 7 is also filled with high-pressure air. Due to the action of the differential pressure check valve 6, namely, a certain pressure difference exists between the air inlet of the differential pressure check valve 6 and the air outlet thereof, the pressure in the spare air cylinder 7 is smaller than that of the auxiliary air cylinder 5, and the pressure difference between the two is larger than or equal to the pressure reduced when the parking air cylinder 2 completes the inflation of the spring brake air chamber 4 once.

When the vehicle is stopped and the parking is applied, and the parking is required to be released, the gas in the parking gas cylinder 2 preferentially opens the two-way one-way valve 8 to charge the spring brake chamber so as to release the parking brake, thereby ensuring that the pressure of the spare gas cylinder 7 is always kept in a stable range.

When the parking air cylinder 2 or the corresponding pipeline leaks or breaks, the standby air cylinder 7 can still open the bidirectional one-way valve 8 to realize the quick inflation of the spring brake air chamber 4, the parking brake is released, and the purpose of quick starting under special working conditions is realized. In addition, due to the action of the differential pressure check valve 6, even if the auxiliary air cylinder 5 and the corresponding pipeline or air unit are leaked, the air in the spare air cylinder 7 is not leaked, and the two-way one-way valve 8 is still opened enough to rapidly charge the spring brake air chamber 4 for parking release.

On the basis of the above embodiment, in the present embodiment, the air outlet of the air compressor 1 is communicated with the air inlet of a multi-circuit protection valve 9, and two air outlets of the multi-circuit protection valve 9 are respectively communicated with the parking air cylinder 2 and the auxiliary air cylinder 5.

Further, an air dryer 10 is further disposed between the air compressor 1 and the multi-circuit protection valve 9, and the air dryer 10 is used for dehumidifying and drying air entering the air dryer 10 from the air compressor 1.

Preferably, the multi-circuit protection valve 9 is a four-circuit protection valve.

In this embodiment, the air inlet of the four-circuit protection valve is communicated with the air compressor 1, two air outlets of the four-circuit protection valve are respectively communicated with the parking air reservoir 2 and the auxiliary air reservoir 5, and the other two air outlets of the four-circuit protection valve are respectively communicated with the front axle brake circuit and the rear axle brake circuit.

In this embodiment, the front axle brake circuit includes a front brake cylinder 12 in communication with a four-circuit protection valve. One air outlet of the four-circuit protection valve is communicated with the air inlet of the front brake air cylinder 12.

The front brake air cylinder 12 is respectively communicated with a front axle relay valve 13 and a foot brake valve 14, wherein the front axle relay valve 13 comprises an air inlet, a control port, an air outlet and two air outlets, and the foot brake valve 14 comprises a first air inlet, a second air inlet, a first air outlet and a second air outlet.

The air outlet of the front brake air reservoir 12 is respectively communicated with the air inlet of the front axle relay valve 13 and the first air inlet of the foot brake valve 14, the first air outlet of the foot brake valve 14 is communicated with the control port of the front axle relay valve 13, and the two air outlets of the front axle relay valve 13 are respectively communicated with the two front axle brake air chambers 15.

In this embodiment, after the foot brake valve 14 is stepped on, the first air inlet and the first air outlet of the foot brake valve 14 are communicated, at this time, high-pressure air is output from the first air inlet of the foot brake valve 14 to the first air outlet of the foot brake valve 14, and then output from the first air outlet of the foot brake valve 14 to the control port of the front axle relay valve 13, at this time, both air outlets of the front axle relay valve 13 are communicated, and high-pressure air is respectively input to the two front axle brake air chambers 15 through the two air outlets of the front axle relay valve 13 to generate braking.

When the foot brake valve is released, two air outlets of the front axle relay valve 13 are communicated with an air outlet of the front axle relay valve, and air in the front axle brake air chamber 15 reversely flows along the front axle relay valve 13 and is exhausted from the air outlet of the front axle relay valve 13 to perform brake release.

In this embodiment, the rear axle brake circuit includes a rear brake air cylinder 16, and an air inlet of the rear brake air cylinder 16 is communicated with an air outlet of the four-circuit protection valve.

Wherein the rear brake air reservoir 16 is respectively communicated with a rear axle relay valve 17 and a foot brake valve 14, wherein the rear axle relay valve 17 comprises an air inlet, a control port, an air outlet and two air outlets.

The air outlet of the rear brake air reservoir 16 is respectively communicated with the air inlet of the rear axle relay valve 17 and the second air inlet of the foot brake valve 14, the second air outlet of the foot brake valve 14 is communicated with the control port of the rear axle relay valve 17, and the two air outlets of the rear axle relay valve 17 are respectively communicated with the service brake chambers in the two spring brake air chambers 4.

In this embodiment, after the foot brake valve is stepped on, the second air inlet and the second air outlet of the foot brake valve 14 are communicated, at this time, high-pressure air is output from the second air inlet of the foot brake valve 14 to the second air outlet of the foot brake valve 14 and then to the control port of the rear axle relay valve 17, at this time, the two air outlets of the rear axle relay valve 17 are communicated, and the high-pressure air is respectively input to the service brake chambers of the two spring brake air chambers 4 through the two air outlets of the rear axle relay valve 17 to generate braking.

When the foot brake valve is released, both air outlets of the rear axle relay valve 17 are communicated with the air outlet of the rear axle relay valve 17, and the service brake chamber air reversely flows along the rear axle relay valve 17 and is exhausted from the air outlet of the rear axle relay valve 17 to perform brake release.

On the basis of the above embodiment, in this embodiment, two spring brake chambers 4 are provided, and a relay valve 11 is connected between the parking brake chambers of the two spring brake chambers 4, and the air outlet of the bidirectional one-way valve 8 is further communicated with the relay valve 11, and is respectively communicated with the parking brake chambers of the two spring brake chambers 4 through the relay valve 11. The outlet of the manual valve 3 is connected to the control port of the relay valve 11.

Alternatively, the relay valve 11 is a differential relay valve.

In other embodiments, two spring brake chambers 4 are provided, and a quick release valve is connected between the parking brake chambers of the two spring brake chambers 4, the air outlet of the two-way one-way valve 8 is further communicated with the parking brake chambers of the two spring brake chambers 4 through the quick release valve, and the air outlet of the manual valve 3 is communicated with the air inlet of the quick release valve.

In the embodiment, the newly added spare air cylinder has the characteristics of one-time inflation and high pressure maintaining, so that the size is not required to be too large, the spare air cylinder can be arranged on the inner side of the frame, and the influence of external factors is reduced.

As shown in fig. 2, an embodiment of the present application further provides a releasing method based on the parking brake releasing device, where the releasing method specifically includes the following steps:

s1, when a manual valve 3 is loosened and a main parking loop has no fault, a parking air cylinder 2 inflates a parking brake cavity of a spring brake air chamber 4 to release in a parking mode;

s2, when the manual valve 3 is loosened and the main parking loop has a fault, the standby air cylinder 7 inflates the parking brake cavity of the spring brake air chamber 4 to release the parking brake.

Furthermore, as the two spring brake air chambers 4 are arranged, the relay valve 11 is connected between the parking brake chambers of the two spring brake air chambers 4, the air outlet of the two-way one-way valve 8 is also communicated with the relay valve 11, the parking brake chambers of the two spring brake air chambers 4 are respectively communicated through the relay valve 11, and the air outlet of the manual control valve 3 is communicated with the control port of the relay valve 11.

When the handle of the manual control valve 3 is put down, high-pressure gas in the parking gas cylinder 2 or the spare gas cylinder 7 is output to a control port of the relay valve 11 through a gas outlet of the manual control valve 3, at the moment, two gas outlets of the relay valve 11 are communicated, and the high-pressure gas in the parking gas cylinder 2 or the spare gas cylinder 7 inflates a parking brake cavity of the spring brake chamber 4 through the relay valve 11 to compress a spring, so that parking brake release is realized.

The method for releasing the parking brake is suitable for all the parking brake releasing devices, a standby parking loop is added on the basis of a main parking loop, a standby air cylinder 7 and a parking air cylinder 2 are respectively connected to two air inlets of a bidirectional one-way valve 8, an air outlet of the bidirectional one-way valve 8 is divided into two paths and is respectively connected to a manual control valve 3 and a relay valve 11, even if the main parking loop fails, the parking brake can be released quickly, and the vehicle can be started quickly under special working conditions. When this embodiment is applied to military vehicle, also can promote military vehicle's battlefield adaptability.

The embodiment of the application also provides a vehicle, and the vehicle comprises the parking brake releasing device.

Specifically, the parking brake release device for a vehicle mainly includes a main parking circuit and a backup parking circuit.

The main parking loop comprises an air compressor 1, a parking air cylinder 2, a manual control valve 3 and a spring brake air chamber 4 which are communicated in sequence. Wherein, the air outlet of the air compressor 1 is communicated with the air inlet of the parking air storage cylinder 2, and the air outlet of the parking air storage cylinder 2 is communicated with the air inlet of the manual control valve 3. And the parking air cylinder 2 is used for inflating a parking brake cavity of the spring brake air chamber 4 after the manual valve 3 is loosened so as to release the parking brake.

The standby parking loop comprises an auxiliary air cylinder 5, a differential pressure one-way valve 6, a standby air cylinder 7 and a two-way one-way valve 8 which are communicated in sequence. Wherein, the two-way one-way valve 8 comprises two air inlets and one air outlet. The air outlet of the auxiliary air cylinder 5 is communicated with the air inlet of a differential pressure one-way valve 6, the air outlet of the differential pressure one-way valve 6 is communicated with the air inlet of a spare air cylinder 7, and the air outlet of the spare air cylinder 7 is communicated with one air inlet of a two-way one-way valve 8.

The air inlet of the auxiliary air cylinder 5 is also communicated with the air outlet of the air compressor 1, the other air inlet of the two-way one-way valve 8 is communicated with the air outlet of the parking air cylinder 2, and the air outlet of the two-way one-way valve 8 is communicated with the manual control valve 3.

In this embodiment, the differential pressure check valve 6 is used to control the pressure of the reserve air cartridge 7 to be lower than the pressure of the auxiliary air cartridge 5 when the reserve air cartridge 7 is inflated, and the reserve air cartridge 7 is used to perform parking release when the primary parking circuit fails.

Further, the parking brake release apparatus of the vehicle further includes a multi-circuit protection valve 9 and an air dryer.

The air outlet of the air compressor 1 is communicated with the air inlet of a multi-loop protection valve 9, and two air outlets of the multi-loop protection valve 9 are respectively communicated with the parking air cylinder 2 and the auxiliary air cylinder 5.

The air dryer 10 is connected between the air compressor 1 and the multi-circuit protection valve 9, and the air dryer 10 is used for dehumidifying and drying air entering the air dryer.

Optionally, the multi-circuit protection valve 9 is a four-circuit protection valve, and the other two air outlets of the four-circuit protection valve are respectively communicated with the front axle brake circuit and the rear axle brake circuit.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.