Governing System Between Engine & Compressor on Air Brake System For Commercial Vehicle

Abstract

The safe operation of vehicles on roads depends, among other things, on a properly functioning brake system. An ‘Air Braking System’ has been designed to use in commercial heavy vehicles with heavier braking capacity and greater efficiency than conventional braking system. Air brake systems are widely used in commercial vehicles such as trucks, tractor-trailers and buses. In these brake systems, compressed air is used as the energy transmitting medium to actuate the foundation brakes mounted on the axles. Normally compressed air is produced by an Air Compressor which is directly driven by the Engine of vehicle. No governing system given between Engine & Air Compressor. Governing system provided after Air Compressor which act as Pressure Relief Valve where the valve will be opened on a certain pressure and release the air to atmosphere. Compressed air then dried through an Air Drier to ensure moisture free air to the system to protect all rubber components. Then the air stored to a Reservoir Tank from where compressed air travel to actuators as per driver pedal pressing. On foot pedal, Dual Brake Valve is given to regulate the air pressures to actuator. Air Pressure Gauge tapped from the Reservoir Tank to show the actual pressure into the system. Actuators convert the pneumatic pressures to linear motion. This linear motion makes the useful torque through Slack Adjuster where worm gear arrangement given. Slack Adjuster gives a rotary motion to S-Cam which directly press the brake liner to drum and applied the brake on wheels. In this project, we are implementing governing system between Engine & Air Compressor. When maximum designed pressure will be developed to the system, Air Compressor will be disengaged from Engine. Hence power loss of engine will be reduced. Also, Air Compressor life will be extended. As per theoretical calculation, 0.35 % of engine power loss can be prevented by this governing system. Also approximate 450-liter fuel cost can be minimized in a single year