Commercial vehicle electronic parking system with temporary opening function and electronic parking assembly

Abstract

The utility model relates to the field of parking brake, disclose commercial vehicle electronic parking system and assembly with temporary traffic function, wherein solenoid valve four on -line, air source compressed air passes through solenoid valve four, and the temporary parking gas circuit opens the car relay valve, when the air pressure reaches setting, solenoid valve four power off, and the temporary parking gas circuit is in the pressure -maintaining state, open solenoid valve three close solenoid valve, and the compressed air of temporary parking gas circuit is connected to the exhaust port through solenoid valve three. The system not only can provide the parking function of commonly used still can provide temporary parking function, and is suitable for the commercial vehicle of ordinary assembly with ABS system.

Description

Technical Field

[0001] This utility model relates to the field of EPB systems for commercial vehicles, and mainly to electronic parking systems and electronic parking assemblies for commercial vehicles with temporary parking functions. Background Technology

[0002] CN213292269U discloses a pneumatic electronic parking brake module for commercial vehicles. By adopting a pneumatic pilot valve structure, it can maintain the current parking / release state when the system is suddenly powered off, thereby improving vehicle safety. Furthermore, since the coil does not need to be energized for a long time, it improves the service life and reliability of the system.

[0003] However, it cannot perform temporary stopping. Generally, for an air braking system to perform temporary stopping, the EPB needs to issue a temporary stopping request, which is then received and executed by the service braking system; or the service braking system can actively perform the temporary stopping function; or the temporary stopping can be performed through an external electronically controlled relay valve connected to the EPB. All of these functions require the additional configuration of an electronically controlled relay valve or the enhancement of the control capabilities of the service braking system. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing an electronic parking system and electronic parking assembly for commercial vehicles with temporary parking function.

[0005] The electronic parking system for commercial vehicles with temporary parking function includes a control unit, normally closed solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, and relay valve; it also includes an air inlet, an air outlet 1 connected to the parking chamber, an air outlet 2 connected to the service brake valve, and an exhaust port.

[0006] Solenoid valve 1, solenoid valve 2, solenoid valve 3, and solenoid valve 4 are all electrically connected to the control unit;

[0007] The air inlet is connected to three air paths: one path is connected to the air inlet of solenoid valve one, one path is connected to the relay valve, and the other path is connected to the air inlet of solenoid valve four. Solenoid valve one and solenoid valve two are connected in series, and the control chamber of the relay valve is connected to the air path between solenoid valve one and solenoid valve two.

[0008] The outlet of solenoid valve 2 is connected to the exhaust port; the relay valve is connected to the exhaust port and also to the parking chamber; solenoid valve 2, solenoid valve 3 and solenoid valve 4 are connected in series, and one end of the air passage of solenoid valve 2 connected to the exhaust port is connected between solenoid valve 2 and solenoid valve 3; there is also a vehicle temporary stop air passage between solenoid valve 3 and solenoid valve 4, and the outlet of the temporary stop air passage is outlet 2.

[0009] When solenoid valve four is energized, compressed air from the air source passes through solenoid valve four and the temporary stop air circuit to open the travel relay valve; when the air pressure reaches the set value, solenoid valve four is de-energized, and the temporary stop air circuit is in a pressure-holding state; when solenoid valve three is opened and closed, the compressed air in the temporary stop air circuit is connected to the exhaust port through solenoid valve three.

[0010] Preferably, it also includes a pressure sensor, which is connected to an air outlet and is connected to a controller to transmit signals to the controller.

[0011] Preferably, a second pressure sensor is also included, which is connected to the temporary stop air circuit and is connected to the controller to transmit signals to the controller.

[0012] As a preferred embodiment, solenoid valve 1, solenoid valve 2, solenoid valve 3, and solenoid valve 4 are all two-position, two-way normally closed solenoid valves.

[0013] Preferably, a one-way valve is also included, which is located at the air inlet before being divided into three air paths.

[0014] Preferably, it also includes a control air path, which is connected to the control chamber of the relay valve.

[0015] The commercial vehicle electronic parking assembly integrates the aforementioned commercial vehicle electronic parking system with temporary parking function.

[0016] Compared with existing technologies, this solution has the following advantages: This system can perform the temporary parking function on its own without configuring an additional electronic control system, and integrates the temporary parking function into one unit, which can meet the needs of commercial vehicles equipped only with ABS systems to realize the temporary parking function. Attached Figure Description

[0017] Figure 1 This is a control function diagram of the parking system.

[0018] The technical names of the labels in the figure are as follows: 1—Control unit, 2—Solenoid valve one, 3—Solenoid valve two, 4—Solenoid valve three, 5—Solenoid valve four, 6—Inlet, 7—Exhaust port, 8—Outlet one, 9—Outlet two, 10—Pressure sensor one, 11—Relay valve, 111—Control chamber, 12—Pressure sensor two, 13—Control port. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] The electronic parking system for commercial vehicles with temporary parking function includes a control unit, normally closed solenoid valve 12, solenoid valve 23, solenoid valve 34, solenoid valve 45, and relay valve 11; it also includes an air inlet 6, an air outlet 18 connected to the parking chamber, an air outlet 29 connected to the service brake valve, and an exhaust outlet 7; its assembly can be adapted to the temporary parking function and can meet the temporary parking needs of vehicles equipped only with ABS system.

[0022] In this embodiment, solenoid valve 1 (2), solenoid valve 2 (3), solenoid valve 3 (4), and solenoid valve 4 (5) are all electrically connected to the control unit; that is, the on / off state of solenoid valve 1 (2), solenoid valve 2 (3), solenoid valve 3 (4), and solenoid valve 4 (5) is controlled by the control unit.

[0023] The air inlet 6 is connected to three air paths: one path is connected to the air inlet of solenoid valve 2, one path is connected to relay valve 11, and the other path is connected to the air inlet of solenoid valve 5.

[0024] Solenoid valve 12 and solenoid valve 23 are connected in series, that is, solenoid valve 12 and solenoid valve 23 are connected through an air passage, and the control chamber 111 of relay valve 11 is connected to the air passage between solenoid valve 12 and solenoid valve 23.

[0025] The outlet of solenoid valve 2 3 is connected to exhaust port 7; relay valve 11 is connected to exhaust port 7 and also connected to the parking chamber; solenoid valve 2 3, solenoid valve 3 4 and solenoid valve 4 5 are connected in series, and one end of the air passage of solenoid valve 2 3 connected to exhaust port 7 is connected between solenoid valve 2 3 and solenoid valve 3 4; there is also a vehicle temporary stop air passage between solenoid valve 3 4 and solenoid valve 4 5, and the outlet of the temporary stop air passage is outlet 2 9;

[0026] When solenoid valve 45 is energized, compressed air from the air source passes through solenoid valve 45 and the temporary stop air circuit to open the travel relay valve 11; when the air pressure reaches the set value, solenoid valve 45 is de-energized, and the temporary stop air circuit is in a pressure-holding state; when solenoid valve 34 is opened and solenoid valve 4 is closed, the compressed air from the temporary stop air circuit is connected to the exhaust port 7 through solenoid valve 34.

[0027] This embodiment also includes a pressure sensor 10, which is connected to the air outlet 8 and connected to the controller to transmit signals to the controller. The main function of the pressure sensor 10 is to detect the air pressure in the parking chamber. When the air pressure meets the requirements, the controller controls the corresponding solenoid valve to open or close.

[0028] The system also includes a second pressure sensor 12, which is connected to the temporary stop air circuit and is connected to the controller to transmit signals to it. The second pressure sensor 12 is used to detect the air pressure in the temporary stop air circuit, and the controller controls the opening and closing of the corresponding solenoid valve based on the signal from the second pressure sensor 12.

[0029] The operating status is as follows, when the vehicle is parked:

[0030] When the vehicle is switched to the parking state, solenoid valve 2 3 is energized, the other solenoid valves are disconnected, the compressed air in the control chamber 111 of relay valve 11 is discharged through solenoid valve 2 3, the relay piston moves up, and the parking chamber is directly connected to the exhaust port 7 through relay valve 11, and the vehicle enters the parking state.

[0031] When the parking brake is released;

[0032] When solenoid valve 2 is energized and the other solenoid valves are de-energized, the compressed air from the air source enters the control chamber 111 of relay valve 11, applying pressure to relay valve 11 and causing the relay piston to move down, so that the air source is connected to the parking chamber through the relay piston. The compressed air from the air source builds pressure in the parking chamber. When the pressure sensor 10 detects that the pressure meets the requirements, solenoid valve 2 is de-energized, the parking chamber is in a pressure-holding state, and the parking brake is released.

[0033] When temporary parking is activated, solenoid valve 45 is opened and the other solenoid valves are closed. The compressed air pressure enters the vehicle relay valve 11 through solenoid valve 45 and the temporary parking air circuit. The vehicle relay valve 11 opens under pressure. When the air pressure sensor 212 detects that the air pressure has reached the set value, solenoid valve 45 is closed. The temporary parking air circuit maintains pressure, and temporary parking is activated.

[0034] When exiting the temporary parking, open solenoid valve 34 and close the other solenoid valves. The compressed air in the temporary parking air circuit is discharged from the exhaust port 7 through solenoid valve 34. When the air pressure sensor 212 detects that the air pressure has been discharged, close solenoid valve 34. At this time, the vehicle is in the temporary parking inactive state.

[0035] Example 2

[0036] The electronic parking brake assembly for commercial vehicles uses the parking system described in Example 1.

[0037] Example 3

[0038] The control method for a commercial vehicle electronic parking system, wherein the parking system adopts the commercial vehicle electronic parking system with temporary access function described in Example 1 above; the control method includes the following operating conditions:

[0039] When the parking function is activated, after the controller receives the parking signal, it opens solenoid valve 2 3, while the other solenoid valves remain normally closed. The compressed air in the control chamber 111 of relay valve 11 is discharged from the exhaust port 7 through solenoid valve 2 3. The control piston of relay valve 11 opens the air passage connecting the exhaust port 1 8 and the exhaust port 7. When the air pressure at the exhaust port 1 8 is detected to be 0, solenoid valve 2 3 is closed, and the vehicle is in the parking state.

[0040] When switching to driving function, after receiving the driving signal, the controller opens solenoid valve 2, while the other solenoid valves remain closed. Compressed air from intake port 6 enters the control chamber 111 of relay valve 11. The piston in the relay chamber moves downward under the action of the compressed air, and intake port 6 is connected to outlet port 8 through relay valve 11. When the air pressure sensor 10 detects that the pressure at outlet port 8 meets the requirements, solenoid valve 2 closes, outlet port 8 is in a pressure-holding state, and the vehicle is in driving mode.

[0041] When the controller detects that a stop activation is required, the controller opens solenoid valve 45, while the other solenoid valves remain closed. Compressed air from inlet 6 enters outlet 29 via solenoid valve 45 and the temporary stop air path. The compressed air from outlet 29 opens the travel relay valve 11. After the air pressure sensor 212 detects that the air pressure at outlet 29 has reached the set value, it closes solenoid valve 45, and outlet 29 is in a pressure-holding state, thus activating the temporary stop.

[0042] When the controller receives the signal to exit the temporary parking, the controller opens solenoid valve 34, while the other solenoid valves remain closed. Compressed air from outlet 29 is discharged from outlet 7 through solenoid valve 34. When the air pressure at outlet 29 is 0, solenoid valve 34 is closed, and the vehicle is in a temporary parking, inactive state.

Claims

1. A commercial vehicle electronic parking system with temporary traffic function, characterized in that: The control unit, normally closed electromagnetic valve one, electromagnetic valve two, electromagnetic valve three, electromagnetic valve four, relay valve, air inlet, air outlet one connected to the parking cavity, air outlet two connected to the service brake valve and air outlet are included. The electromagnetic valve one, electromagnetic valve two, electromagnetic valve three and electromagnetic valve four are electrically connected with the control unit. The air inlet is communicated with three air paths, one of which is connected to the air inlet end of the electromagnetic valve one, one of which is connected to the relay valve, and the other of which is connected to the air inlet end of the electromagnetic valve four; the electromagnetic valve one and the electromagnetic valve two are connected in series, and the control cavity of the relay valve is communicated with the air path between the electromagnetic valve one and the electromagnetic valve two. The air outlet end of the electromagnetic valve two is communicated with the air outlet; the relay valve is communicated with the air outlet, and the relay valve is also communicated with the parking cavity; the electromagnetic valve two, the electromagnetic valve three and the electromagnetic valve four are connected in series, one end of the air path connected to the air outlet is connected between the electromagnetic valve two and the electromagnetic valve three; the electromagnetic valve three and the electromagnetic valve four are also bypassed by the vehicle temporary parking air path, and the air outlet end of the temporary parking air path is the air outlet two. When the electromagnetic valve four is powered on, the compressed air of the air source passes through the electromagnetic valve four and the temporary parking air path to open the service relay valve; when the air pressure reaches the setting, the electromagnetic valve four is powered off, and the temporary parking air path is in a pressure maintaining state; when the electromagnetic valve three is opened and the electromagnetic valve is closed, the compressed air of the temporary parking air path is communicated to the air outlet through the electromagnetic valve three.

2. The electronic parking system for a commercial vehicle having a temporary traffic function according to claim 1, characterized in that The air pressure sensor one is also included, which is communicated with the air outlet one, and the air pressure sensor one is connected with the controller and transmits signals to the controller.

3. The electronic parking system for a commercial vehicle having a temporary traffic opening function according to claim 1, characterized in that: The air pressure sensor two is also included, which is communicated with the temporary parking air path, and the air pressure sensor two is connected with the controller and transmits signals to the controller.

4. The electronic parking system for a commercial vehicle having a temporary traffic opening function according to claim 1, characterized in that: The electromagnetic valve one, electromagnetic valve two, electromagnetic valve three and electromagnetic valve four are all two-position two-way normally closed electromagnetic valves.

5. The electronic parking system for a commercial vehicle having a temporary traffic opening function according to claim 1, characterized in that: The one-way valve is also included, which is arranged in the air inlet before being divided into three air paths.

6. The electronic parking system for a commercial vehicle having a temporary traffic opening function according to claim 1, characterized in that: The control air path is also included, which is communicated with the control cavity of the relay valve.

7. Commercial vehicle electronic parking assembly, characterized in that: The commercial vehicle electronic parking system with temporary vehicle opening function integrated in any one of claims 1 to 6 is also included.

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