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200416 3-5
Description of components
CE ENGINE FUEL SYSTEM
ΧΦ65/75/85 series
4
2
3.4 FUEL RAIL PRESSURE-LIMITING VALVE
The fuel rail has a pressure-limiting valve so that
the rail pressure is maintained at a safe value in
emergency situations.
The fuel rail pressure control circuit is normally
active. This consists of the fuel lift pump, fuel
pump control solenoid valve, high-pressure
pump, fuel rail, rail pressure sensor and
electronic unit. If a fault occurs, the rail pressure
can no longer be controlled. This can rise to the
actuating pressure of the fuel rail pressure-
limiting valve. This pressure is approx. 1650 bar.
In the open position all surplus fuel flows without
pressure to the fuel tank return connection.
The valve includes a sealing cone (1), a valve
body (2), a spring (3) and a return connection with
quick-release coupling (4).
i400592
1
2
3
4
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