Exhaust brake valve and air compressor combined auxiliary braking system and method

Abstract

The invention discloses an auxiliary braking system combining an exhaust brake valve and an air compressor. A first input end of a supercharger of the system introduces air, and a second output end ofthe supercharger is connected with the exhaust brake valve; an engine body is in transmission with an air compressor clutch of the air compressor through a transmission gear, an input end of the aircompressor introduces air, an output end of the air compressor is connected with an input end of a dryer, and an output end of the dryer is connected into an air storage tank; an air ventilation opening of the air compressor clutch is connected to an unloading opening of the dryer through an air compressor unloading pipeline, the air compressor unloading pipeline is provided with an electromagnetic valve, and a control end the electromagnetic valve is connected with an ECU; and the exhaust brake valve is provided with an exhaust pressure sensor, the air storage tank is provided with a stored air pressure sensor, signal output ends of the exhaust pressure sensor, the stored air pressure sensor, an auxiliary brake relay, a brake pedal position sensor and a vehicle speed sensor are connectedwith the ECU correspondingly, and an exhaust control signal output end of the ECU is connected with the exhaust brake valve. The auxiliary braking system combining the exhaust brake valve and the aircompressor and the method can improve the auxiliary braking power.

Description

technical field [0001] The invention relates to the technical field of energy recovery of a supercharged internal combustion engine, in particular to an auxiliary brake system and method combined with an exhaust brake valve and an air compressor. [0002] technical background [0003] Existing commercial vehicles generally use exhaust brakes as auxiliary brakes to improve vehicle braking capabilities. The basic working principle is to use exhaust brake valves arranged in the exhaust passages to block the exhaust passages of internal combustion engines. Due to the increase of exhaust resistance, the exhaust stroke of the internal combustion engine piston must overcome this pressure. The piston is subjected to the back pressure of the gas, which is transmitted to the wheels through the crankshaft and the transmission system, forcing the vehicle to reduce the speed, so as to reduce the vehicle speed in a short time. The purpose is to improve the braking capacity to reduce the us...

AI Technical Summary

Problems solved by technology

[0006] 1. This structure is to protect the supercharger. When the allowable pressure of the supercharger is reached, a part of the exhaust gas energy is bypassed, resulting in low auxiliary braking power and insufficient auxiliary braking power;

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