1. The brake exhaust brake valve
In the next long slope and other heavy vehicles frequently used heat load conditions will brake the braking system is very large, the brake system is unable to timely release heat to the surroundings so that the brake shoes and the brake drum temperature is too high, wear faster, so that the main brake lose some or all of the braking performance, which will seriously affect the continuous brake master brake system performance, thus affecting the safety brake. The use of the auxiliary brake device can reduce the frequency of the primary braking system, the brake temperature reduction produced by continuous use of the brakes is too high, performance degradation, a series of severe wear problems. Thus, the auxiliary braking device applied more widely. The auxiliary brake means includes: engine brake, exhaust brake, retarder and eddy current retarder, exhaust brake as a cost-effective and heavy-duty vehicles and passenger cars in the highest auxiliary braking device on being widely used.
exhaust brake valve
electrically controlled pneumatic exhaust brake with an exhaust brake actuator position and a major role in the exhaust brake means, and fuel cut control means three-part mechanism. Exhaust brake valve and the exhaust brake cylinder to the exhaust brake actuator. Exhaust brake switch, an accelerator pedal, the clutch pedal and the interlocking switch, the exhaust brake actuation indicator, solenoid valves and air tubes, and the like control means, fuel tanks and other stop means are composed of off the oil.
actuating the exhaust brake system is composed of a cylinder and valve and the exhaust brake valve control solenoid valves, the air supply pipe, electrical, circuits, etc., it is installed in the engine exhaust brake valve exhaust tube. When the exhaust brake, an exhaust brake switch button is pressed, the exhaust brake butterfly valve mechanism closes the exhaust passage of the engine piston is subjected to inverse pressure of the gas in the exhaust stroke, the engine operating block generated braking action, the vehicle speed control purposes.
When the exhaust brake system operation, the valve body is closed when the exhaust stroke of the engine, the engine cylinders and the exhaust gas in the exhaust pipe is compressed, power consumed by this process, it generating system for carspower. The braking force of the engine with the exhaust pipe and the inner cylinder pressure (engine backpressure) rises increases. Cars equipped with exhaust brake valve has the following advantages: when the
(1) the long slope cars, the number of service braking effect and duration may be significantly reduced to prevent overheating of the brakes and the braking force decay, holding brake always in good condition. Extend the life of the shoe to reduce fatigue of the driver’s braking process, environmentally friendly.
a brake (2) is a gas engine exhaust brake and an exhaust pipe compression generated. Accordingly brake soft, non-impact, reducing the impact load components, extend the life of the related parts, reduce maintenance frequency
(3) is an exhaust brake to the drive wheels through the drive train. The differential drive axle braking torque evenly to the right and left wheels. Reducing the tendency of side slip, while driving with a sense of security can be increased average speed of the vehicle.
(4) The exhaust brake switch stop the oil has some fuel efficiency.
the exhaust brake valve assembly structure and working principle
exhaust brake valve assembly are: maneuvering cylinder subassembly, the coupling portion, valve sub-assembly of three parts. Wherein the actuating cylinder becomes half of the total control means to become half of the total valve actuator. When exhaust braking is required, the compressed air from the air reservoir by actuating the cylinder intake port subassembly charged maneuvering cylinder, pushing the piston the valve sheet via the link mechanism is fully closed.