1.3 MULTIJET 16V
(75 & 90 HP)
FIAT PUNTO TRAINING OUTLINE
Fiat Auto S.p.A.
After Sales Training
pump found in the tank module. The high-pressure pump volume flow rate is distributed as
follows:
approximately 22% is injected by the injectors and burnt in the cylinder;
approximately 28% is used to lubricate the high-pressure pump and is recovered through the
KUEV valve;
approximately 50% corresponds to the excess fuel recovered through the pressure
accumulator and the injectors.
KUEV valve
The purpose of this mechanic valve is to keep the pressure inside the pump constant (it
discharges any overpressure, to prevent pressure peaks from damaging the pump), and also
control the fuel flow needed to cool and lubricate the eccentric shaft and the plungers of the
CP1-H.
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