4
XF ENGINE BRAKE
General
95
XF series
2-4
2.4
GENERAL DESCRIPTION OF ENGINE BRAKE SYSTEM
The collective term “engine brake” covers the
exhaust brake or butterfly valve, and the DAF
Engine Brake.
The introduction of the DAF XF 12.6 litre engine
also marks the introduction of a new type of
engine brake for DAF.
This is the DAF Engine Brake, or DEB for short.
Every XF engine has a factory-fitted exhaust
brake.
At customer’s request, the DEB can be installed
at the factory or at a later date.
If the driver activates the engine brake by
means of the engine brake control switch on the
cab floor, both the exhaust brake and the DEB
are engaged. Therefore, the DEB always works
in conjunction with the exhaust brake.
As the CTE-2 checks the activation of the
engine brake, it will disengage the engine brake
below a certain engine speed (see CTE-2
systems manual).
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