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Air supply source protection bypass for electronic parking brake systems and vehicles including such systems

An electronic parking brake and air supply technology, applied in the direction of brake control system, brake, brake components, etc., can solve expensive and complicated problems

Active Publication Date: 2022-07-19
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of this system is that an additional pressure sensor is required to confine the control chamber of the relay valve when the pressure drops below the critical pressure during normal operation
This arrangement is complex and expensive

Method used

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  • Air supply source protection bypass for electronic parking brake systems and vehicles including such systems
  • Air supply source protection bypass for electronic parking brake systems and vehicles including such systems
  • Air supply source protection bypass for electronic parking brake systems and vehicles including such systems

Examples

Experimental program
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Embodiment Construction

[0019] figure 1 An electronic parking brake system 2 (or EPB system) of a vehicle V is shown. In this example, and as Image 6 As shown, the vehicle V is a truck including a lorry and a trailer.

[0020] The EPB system 2 includes at least one (preferably two) parking brake actuators 10 .

[0021] In this example, and for its part, each parking brake actuator 10 includes a spring brake cylinder (not shown). The spring brake cylinder includes a pressurized chamber that is vented when the driver requests the application of the parking brake, and which in turn causes the application of the braking force due to the unloading of the spring. When the driver requests to release the parking brake, the spring brake cylinder chamber is pressurized with compressed air.

[0022] Advantageously, the application and release of the parking brake can be electronically commanded by the driver through a parking brake input device (not shown) such as a handbrake lever or an operating switch. ...

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PUM

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Abstract

The invention relates to an electronic parking brake system (2) comprising an air supply source (4), a check valve (6) connected to the air supply source, an electro-pneumatic control unit (8), at least one parking brake A vehicle brake actuator (10), a relay valve (12), and an electrically actuated valve (14), the relay valve (12) including a first port (12a) connected to the check valve, connected to A second port (12b) of the electro-pneumatic control unit, a third port (12c) connected to the parking brake actuator and a fourth port (12d) communicating with the atmosphere, the electro-actuated valve is powered by the electro-pneumatic control unit The pneumatic control unit (8) controls and includes a first orifice (14a), a second orifice (14b), a third orifice (14c) and preferably an exhaust orifice, the first orifice being connected to the A compressed air line (16) extending between the non-return valve and the air supply source, the third orifice is connected to the electro-pneumatic control unit (8). The second port (14b) is connected to another compressed air line (18) extending between the check valve (6) and the first port (12a) of the relay valve (12).

Description

technical field [0001] The present invention relates to an electronic parking brake system and a vehicle comprising such a system. Background technique [0002] In the automotive industry, traditional mechanical parking brakes are gradually being replaced by electronic parking brakes. However, the control unit for the electronic parking brake requires electrical energy to function. Thus, in such electronically controlled braking systems, failure of the power supply can be a problematic event, since electrical components such as the electronically controlled system and electrically actuated solenoid valves can no longer be actuated. Thus, the driver may be trapped in the vehicle because it is impossible for him to stop the vehicle. [0003] US 2010 / 0025141 A1 is probably the closest prior art, which discloses an electronic parking brake system. In this disclosure, in the event of an unexpected failure of the power supply, the control pressure present at the control input o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/68B60T13/26
CPCB60T13/268B60T13/683B60T8/1708B60T8/327B60T15/041B60T2270/402B60Y2400/81
Inventor 克里斯托夫·隆利昂内尔·法雷斯
Owner VOLVO LASTVAGNAR AB