CE ENGINE, ENGINE BRAKE
2-2
©
200416
General
4
ΧΦ65/75/85 series
4
2.2 SYSTEM DESCRIPTION, EXHAUST BRAKE
Note:
The engine brake is an exhaust brake.
Switching on the exhaust brake
The exhaust brake consists of an engine brake
operating switch fitted in the cab floor and an
operating cylinder (3) connected to the butterfly
valve (4) in the exhaust pipe.
If the engine brake operating switch is activated,
a signal is passed to the engine management
system's electronic unit. The engine
management system's electronic unit interrupts
the fuel supply to the various cylinders. The unit
also energises the exhaust brake valve (2),
causing supply pressure to flow to the operating
cylinder. This cylinder closes the butterfly valve in
the butterfly valve housing. The exhaust pipe is
then almost completely closed off.
The engine now acts as a compressor, creating a
braking action.
The higher the engine speed, the greater the
braking action of the exhaust brake.
Switching off the exhaust brake
If the engine brake operating switch is released,
the butterfly valve will be re-opened and the fuel
supply to the various cylinders will be re-instated.
I400868
4
2
3
1
1. Supply pressure
2. Exhaust brake valve
3. Butterfly valve operating cylinder
4. Butterfly valve
https://www.truck-manuals.net/
To Next Page
Loading...
Need help?
General
