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" Over simplified" air brake diagram on a commercial road vehicle (does not show all air reservoirs and all applicable air valves).
The air compressor is driven off of the engine either by crankshaft pulley via a belt or directly off of the engine timing gears. It is lubricated and cooled by the engine lubrication and cooling systems. Compressed air is first routed through a cooling coil and into an air dryer which removes moisture and oil impurities and also may include a pressure regulator, safety valve and a smaller purge reservoir. As an alternative to the air dryer, the supply system can be equipped with an anti freeze device and oil separator. The compressed air is then stored in a reservoir (also called a wet tank) from which it is then distributed via a four way protection valve into the front and rear brake circuit air reservoir, a parking brake reservoir and an auxiliary air supply distribution point. The system also includes various check, pressure limiting, drain and safety valves.
Control systemThe control system is further divided into two service brake circuits: the parking brake circuit and the trailer brake circuit. This dual brake circuit is further split into front and rear wheel circuits which receive compressed air from their individual reservoirs for added safety in case of an air leak. The service brakes are applied by means of a brake pedal air valve which regulates both circuits. The parking brake is the air operated spring brake type where its applied by spring force in the spring brake cylinder and released by compressed air via hand control valve. The trailer brake consists of a direct two line system: the supply line (marked red) and the separate control or service line (marked blue). The supply line receives air from the prime mover park brake air tank via a park brake relay valve and the control line is regulated via the trailer brake relay valve. The operating signals for the relay are provided by the prime mover brake pedal air valve, trailer service brake hand control (subject to a country's relevant heavy vehicle legislation) and the prime mover park brake hand control.
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Explain basic principle of analog clamp meter?
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The basic and most common functions of valves in a hydraulic system are to regulate the flow and pressure of liquids. There are varieties of valves as per their functions such as: Isolation valves, to open and close the system, Flow control valves/Balancing valves, to co control the quantity of flowing liquid, Pressure relief valve, to release the excess pressure from the system, etc.
Principle and operation?
principle refers to the basic objective of something. Operation refers to how it operates.
What is the basic principle of a jet engine?
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What are the four basic components of a fluid system?
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A principle of risk management?
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The basic principle in the U.S. government is democracy. The founding fathers and the framers of the Constitution wanted to make sure the people had control.
What establishes the basic principle of civilian control of the armed forces?
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What is the basic principle of radar communication system?
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Explain basic principle of analog clamp meter?
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A connection of a contactor to three phase motor.
What are the principles of administration?
basic administ
