Module assembly of intelligent electronic halt vehicle system

Abstract

The invention discloses a module assembly of an intelligent electronic halt vehicle system, comprising an exhaust solenoid valve, an intake solenoid valve, a normally open solenoid valve, a normally closed solenoid valve, a halt vehicle relay valve and a pressure sensor which are all arranged on a central controller. Compared with the prior art, the module assembly of the intelligent electronic halt vehicle system disclosed by the invention realizes the regulation for a halt braking force through the exhaust solenoid valve, the intake solenoid valve, the normally open solenoid valve, the normally closed solenoid valve, the halt vehicle relay valve and the pressure sensor, and can also achieve the linear regulation for the halt braking force through a real-time feedback of a voltage signal from the pressure sensor. Due to the linear control function for the halt brake force, the module assembly of the intelligent electronic halt vehicle system can be used as an emergency brake when the braking force of a vehicle does not meet the braking demand. Compared with traditional pneumatic-controlled halt vehicle systems, the module assembly of the intelligent electronic halt vehicle system can avoid the sliding at the beginning of halting on a ramp and the delay at the beginning of starting a vehicle, and can shorten the braking distance in the case of an emergency braking.

Description

technical field [0001] The invention relates to an electronic parking system, in particular to an intelligent electronic parking system module assembly, which belongs to the field of motor vehicle manufacturing. Background technique [0002] The parking brake system is used to realize the long-term parking of the vehicle, and to assist the vehicle to start the hill on the slope. At present, the electronic parking system has begun to be popularized in passenger cars, and for the use of energy storage spring brake Commercial vehicles generally use a purely mechanical manual valve plus a parking relay valve for the air brake system. However, with the development of intelligent and unmanned vehicles, an intelligent electronic parking device is required. High reliability and security. [0003] Patent Document 1 (CN105905087A) discloses a pneumatic electronic parking system with emergency braking, which includes a parking brake controller electrically connected to the rear servi...

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Problems solved by technology

[0006] The electronic parking systems disclosed in Patent Document 1, Patent Document 2 and Patent Document 3 all have their inherent deficiencies to varying degrees. Patent Document 1 uses a normally closed solenoid valve to control inflation to release parking. There is a leak, once the air pressure in the spring chamber is reduced enough to overcome the spring force, the brake will automatically apply the parking brake, especially when in a partial braking state, the brake will drag, and before the vehicle misfires due to overheating , it is generally difficult for the driver to find out, so there is a potential safety hazard; Patent Document 2 uses a cable for parking braking, which is generally only used for small-tonnage passenger cars. Large, requires large power of the motor, large movement distance of the cable, large force, low reliability, and is not suitable for commercial vehicles; Patent Document 3 In the process of driving, the solenoid valve needs to be energized for a long time to keep the parking brake at When the state is released, once the circuit fails, the vehicle will automatically implement the parking brake. According to the requirements of GB12676 regulations, automatic parking without the driver's will cannot occur. At the same time, the parking brake of medium and heavy vehicles is only applied to the middle and rear axles. In this case, the driving vehicle will be out of control, such as flicking, and there is a great potential safety hazard

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