CN216331992U - Electronic parking braking system for heavy-duty car - Google Patents
Electronic parking braking system for heavy-duty car Download PDFInfo
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- CN216331992U CN216331992U CN202122986118.4U CN202122986118U CN216331992U CN 216331992 U CN216331992 U CN 216331992U CN 202122986118 U CN202122986118 U CN 202122986118U CN 216331992 U CN216331992 U CN 216331992U
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Abstract
The utility model provides an electronic parking brake system for a heavy truck, which mainly comprises a parking memory valve, a temporary parking valve, a process control valve, a two-way check valve, an EPB switch, an EPB controller and a brake pipeline, wherein the parking memory valve is connected with the temporary parking valve; the air outlet of the air compressor is connected with the air inlet of the dryer, the air outlet of the dryer is connected with the three air cylinders, the third air cylinder is connected with the air inlet of the parking memory valve, the air outlet of the parking memory valve is connected with the air inlet of the process control valve, the air outlet of the process control valve is connected with the air inlet of the parking relay valve, and the air outlet of the parking relay valve is connected with the air inlet of the air chamber; the second gas cylinder is a rear axle traveling crane gas cylinder and is connected with a temporary stopping valve and a traveling crane relay valve gas inlet, a temporary stopping valve gas outlet is connected with a two-way one-way valve gas inlet, and a two-way one-way valve gas outlet is connected with a traveling crane relay valve control port. The EPB switch replaces a traditional hand brake valve, so that the arrangement space is saved, and the operation process is simplified by means of key operation; meanwhile, the original air supply pipeline is improved.
Description
Technical Field
The utility model belongs to the technical field of machinery, and particularly relates to an electronic parking braking system for a heavy-duty car.
Background
The existing parking brake system of the heavy-duty car adopts a traditional mechanical hand brake structure, and the parking brake control actuating mechanism of the traditional structure is complex, poor in reliability and not beneficial to the safety of the car.
Because the traditional parking braking system adopts pure air braking, the braking response of the braking system is slow and the braking efficiency is low during parking braking.
The conventional parking brake system for the heavy-duty automobile needs reasonable matching of a clutch and an accelerator when starting on a ramp, adopts a conventional mechanical hand brake structure, frequently uses a hand brake, reduces the service life of a parking spring cylinder, and has poor parking reliability when a driver forgets to brake a parking handle; the operation process and the execution mechanism are complex, which is not beneficial to the more convenient operation of the parking brake and the creation of more comfortable driving space for the driver, and is not beneficial to the safety of the vehicle.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electronic parking brake system for a heavy truck, which saves the layout space, reduces the system complexity, simplifies the operation process and an actuating mechanism, and improves the comfort and the safety of the whole truck.
In order to solve the above technical problems, the present invention provides an electronic parking brake system for a heavy vehicle, comprising: the system mainly comprises a parking memory valve 12, a temporary parking valve 10, a process control valve 13, a two-way check valve 11, an EPB switch 1 and an EPB controller 2; the EPB controller 2 is used for acquiring EPB switching signals and feeding corresponding signals back to the parking memory valve 12, the temporary parking valve 10 and the process control valve 13 for control; the air outlet of the air compressor is connected with the air inlet of the dryer, the air outlet of the dryer is connected with a plurality of air cylinders, one air cylinder is connected with the air inlet of the parking memory valve 12, the air outlet of the parking memory valve 12 is connected with the air inlet of the process control valve 13, the air outlet of the process control valve is connected with the air inlet of the parking relay valve 15, and the air outlet of the parking relay valve is connected with the air inlet of the air chamber; the second gas cylinder is a rear axle traveling crane gas cylinder and is connected with a temporary stopping valve and a traveling crane relay valve gas inlet, a temporary stopping valve gas outlet is connected with a two-way one-way valve gas inlet, and a two-way one-way valve gas outlet is connected with a traveling crane relay valve control port.
Has the advantages that: the utility model communicates with other controllers of the whole vehicle through a CAN network, in order to realize an electronic parking brake system, an EPB switch replaces a traditional hand brake valve, so that the arrangement space is saved, the parking brake is realized through the operation of a key, and the operation process is simplified; meanwhile, an original air supply pipeline is improved, and the specific scheme is that an original connecting air path is reserved (specifically, see an air path schematic diagram), an area pipeline of a dot-dash line shown in the figure is added, a parking memory valve and a process control valve are added between a third loop air cylinder and a parking relay valve, an air pressure sensor is additionally arranged, and air pressure in a parking brake air chamber is detected; an air inlet pipeline is additionally arranged among the first loop air cylinder, the foot brake valve and the traveling relay valve and comprises a temporary stop valve and a two-way check valve; the release and braking can be automatic.
Drawings
FIG. 1 is a schematic diagram of an air circuit of an electronic parking brake system;
fig. 2 is a schematic diagram of the wiring of the electrical appliance.
1: EPB switch 2: EPB controller 3: ABS-ECU 4: CAN bus 5: wheel speed sensor 6: front axle diaphragm cylinder 7: ABS solenoid valve × 48: the relay valve 9: master brake valve 10: temporary stop valve 11: two-way check valve 12: parking memory valve 13: process control valve 14: the air pressure sensor 16: traveling relay valve 15: parking relay valve 17: and a spring brake cylinder.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.
The utility model provides an electronic parking brake system for a heavy truck, which mainly comprises a parking memory valve 12, a temporary parking valve 10, a process control valve 13, a two-way check valve 11, an EPB switch 1, an EPB controller 2 and a brake pipeline; the EPB controller 2 controls a parking memory valve 12, a temporary parking valve 10, a process control valve 13 and a two-way check valve 11 through an ABS-ECU;
the air outlet of the air compressor is connected with the air inlet of the dryer, the air outlet of the dryer is connected with three air cylinders, the third air cylinder is connected with the air inlet of the parking memory valve 12, the air outlet of the parking memory valve 12 is connected with the air inlet of the process control valve 13, the air outlet of the process control valve is connected with the air inlet of the parking relay valve 15, and the air outlet of the parking relay valve is connected with the air inlet of the air chamber; the second gas cylinder is a rear axle traveling crane gas cylinder and is respectively connected with a temporary stopping valve and a traveling crane relay valve gas inlet, a temporary stopping valve gas outlet is connected with a two-way one-way valve gas inlet, and a two-way one-way valve gas outlet is connected with a traveling crane relay valve control port.
According to the utility model, a parking memory valve and a process control valve are additionally arranged between a third loop air cylinder and a parking relay valve, and an air pressure sensor is additionally arranged to detect the air pressure in a parking brake air chamber; an air inlet pipeline is additionally arranged among the first loop air cylinder, the foot brake valve and the traveling relay valve and comprises a temporary parking valve and a two-way check valve.
The working process is as follows:
during parking braking, the parking brake switch of the EPB switch is pulled upwards, the parking indicator lamp is turned on, the EPB controller collects EPB switch signals and feeds the signals back to the parking memory valve and the process control valve, gas from a port 2 of the parking memory valve to the process control valve is exhausted from an exhaust port of the parking memory valve, gas in a front cavity of the spring brake cylinder is exhausted from an exhaust port of the relay valve through a port 2 of the relay valve and gas from a port 2 of the parking relay valve to the process control valve, meanwhile, a gas pressure sensor arranged on the parking relay valve can monitor gas pressure signals and feed the gas back to the EPB controller, so that the gas in the front cavity of the spring brake cylinder is exhausted, a spring in a spring cavity in the gas chamber is popped up, a push rod moves forwards, force is applied to a rear axle brake drum, and the push rod performs parking braking under the release action of the spring force.
When the parking brake is released, the parking brake switch is pushed down, the parking indicator lamp is turned off, the parking memory valve and the process control valve are opened, gas flows to the 4 ports of the parking relay valve through the parking memory valve and the process control valve, after the 4 ports of the parking relay valve receive signals, the gas from the 1 port of the parking relay valve reaches the rear cavity of the spring brake cylinder, the gas compresses the spring after reaching a certain pressure, and the brake spring in the spring brake cylinder is pressed back under the action of the gas, so that the parking brake is released.
When the temporary parking is carried out, a temporary parking switch of the EPB switch is turned on, a switch temporary parking indicator lamp is turned on, the controller receives a switch signal and feeds the signal back to the temporary parking valve, the temporary parking valve controls the traveling relay valve through the two-way check valve, after the port 4 of the traveling relay valve receives the signal, air flows into the port 2 from the port 1 of the relay valve and is communicated to the front cavity of the spring brake cylinder, the diaphragm in the air chamber is pushed, the push rod in the air chamber moves forwards, force is applied to the rear axle brake drum, and the temporary parking is started.
When the temporary parking is released, the vehicle starts or the brake is released through the parking switch, the temporary parking brake is released, and the temporary parking work indicator lamp automatically stops and flashes at a point. When the vehicle starts, the ports 11 and 12 of the brake master valve are closed, the ports 21 and 22 stop supplying air, the compressed air in the front axle air chamber and the air pipe is exhausted into the atmosphere through the exhaust port of the brake master valve, the compressed air in the rear axle air chamber and the air pipe is exhausted into the atmosphere through the exhaust port of the traveling relay valve, and the temporary parking brake is released.
When the vehicle is static and the accelerator is not stepped on for 3 seconds, the system automatically starts the temporary parking brake, the temporary parking time exceeds 2 minutes, the system starts the parking brake, and simultaneously closes the temporary parking brake. At the moment, the function is favorable for prolonging the service life of the parking spring cylinder, and the temporary parking function is air during the foot-treading brake of the locking, so that the temporary parking function can reduce the discharge of parking air and save the air source and the energy.
Fig. 2 is a schematic diagram of an electrical appliance wiring diagram of an electronic parking brake system, a controller realizes information sharing with other electronic control systems of an automobile through a CAN network, and acquires signal data such as automobile running speed, engine speed, torque, a parking brake switch, a clutch position, a brake pedal, and the like, and meanwhile, the controller CAN also automatically acquire and detect related automobile information, such as: the automobile parking brake control system comprises a transmission gear, a gear shifting handle, a brake signal and the like, and is used for judging the running condition of an automobile, driving a solenoid valve to act and realizing the control of parking brake. When the engine is in a working state, the vehicle is flameout, and the parking brake switch is forgotten to be pulled up, so that the vehicle can be automatically started for parking. Even if the vehicle forgets to push the parking switch to release the parking brake when the vehicle is in gear shifting, is released from the clutch and is filled with oil, the vehicle can also brake to release the parking brake at the moment.
The utility model has the following characteristics:
1. the traditional parking hand valve is replaced by the EPB electronic switch, the hand brake is represented by pulling up the EPB switch, the hand brake is released by pushing down the EPB switch, the service brake is preferentially used by pulling up the EPB switch in the service process, and the parking brake is started when the service brake is failed or the vehicle speed is less than 7 km/h.
2. The temporary parking function is activated by allowing braking, the system does not need to step on the brake or use a hand brake all the time when the vehicle is parked on a traffic signal light fire ramp, the temporary parking function is automatically started by the system, and the vehicle can be braked by only slightly pressing an accelerator when the vehicle needs to run.
3. When the emergency running vehicle is in an emergency, the emergency braking can be realized by pulling up the EPB switch, and the vehicle cannot deviate or drift.
4. When a driver drives the vehicle, if the driver forgets to send the hand brake, the system automatically releases the parking after starting.
5. When the automobile is shut down, if the automobile is not parked, the parking brake is automatically started.
6. The vehicle has the hill starting assisting function and prevents the vehicle from rolling backwards.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. An electronic parking brake system for a heavy vehicle, characterized in that: mainly comprises a parking memory valve (12), a temporary parking valve (10), a process control valve (13), a two-way check valve (11), an EPB switch (1) and an EPB controller (2); the EPB controller (2) is used for acquiring EPB switching signals and feeding corresponding signals back to the parking memory valve (12), the temporary parking valve (10) and the process control valve (13) for control; the air outlet of the air compressor is connected with the air inlet of the dryer, the air outlet of the dryer is connected with a plurality of air cylinders, one air cylinder is connected with the air inlet of the parking memory valve (12), the air outlet of the parking memory valve (12) is connected with the air inlet of the process control valve (13), the air outlet of the process control valve is connected with the air inlet of the parking relay valve (15), and the air outlet of the parking relay valve is connected with the air inlet of the air chamber; the second gas cylinder is a rear axle traveling crane gas cylinder and is connected with a temporary stopping valve and a traveling crane relay valve gas inlet, a temporary stopping valve gas outlet is connected with a two-way one-way valve gas inlet, and a two-way one-way valve gas outlet is connected with a traveling crane relay valve control port.
2. An electric parking brake system for a heavy vehicle according to claim 1, wherein: the air pressure sensor is arranged in a pipeline of an air outlet of the process control valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122986118.4U CN216331992U (en) | 2021-11-30 | 2021-11-30 | Electronic parking braking system for heavy-duty car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122986118.4U CN216331992U (en) | 2021-11-30 | 2021-11-30 | Electronic parking braking system for heavy-duty car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216331992U true CN216331992U (en) | 2022-04-19 |
Family
ID=81155670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122986118.4U Active CN216331992U (en) | 2021-11-30 | 2021-11-30 | Electronic parking braking system for heavy-duty car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216331992U (en) |
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2021
- 2021-11-30 CN CN202122986118.4U patent/CN216331992U/en active Active
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