The document describes an engine exhaust brake that is used as an auxiliary brake for slowing down vehicles travelling on long downhill gradients or in heavy traffic. The brake works by using compressed air and linkages to close a butterfly valve in the exhaust manifold, which cuts off the fuel supply when the foot control valve is pressed. This harness the engine's compression power to help slow the vehicle. The exhaust brake is effective at speeds below 40 kph and helps reduce fuel consumption.

1. ENGINE EXHAUST BRAKE

3. ENGINE EXHAUST BRAKE
• This type of brake is used as an Auxiliary brake.
• It is meant for use while travelling on a lengthy
downhill gradient and also in heavy traffic.
• When it becomes necessary to slow down
continuously over a large distance.

4. CONSTRUCTION
The main components of this brake are
1. PRESSURE REGULATOR-to regulate Compressed air.
2. FOOT CONTROL VALVE-for actuating the Exhaust
brake.
3. AIR CYLINDER-operates the linkage to actuate the
butterfly vale in Exhaust manifold.
4. LINKAGE-to actuate the control lever of the Valve.

5. WORKING
• The brake comes into operation.
• When the foot control valve is pressed, the compressed air
from the air tank enters the air cylinder.
• Where it operates a linkage to close the butterfly valve at the
Exhaust manifold, which also cut-off the fuel supply through
linkage.
• The moment the foot is taken off the valve, the brake gets
released.
• In this way, this type of brakes effect fuel economy also.
• This brake is very effective below vehicle speed 40 kmph.