Fuel injection system monitoring abnormal pressure in inlet...

Details Fuel injection system monitoring abnormal pressure in inlet... Fuel injection system monitoring abnormal pressure in inlet...

2006-07-19

2008-10-07

Moulis, Thomas N (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S447000, C123S458000

Reexamination Certificate

active

07431018

ABSTRACT:
A fuel injection system is equipped with a high-pressure supply pump driven by an output of an internal combustion engine to supply fuel to an accumulator, a low-pressure supply pump driven by a power source other than the engine to suck the fuel from a fuel tank and supply the sucked fuel to the high-pressure supply pump, and a pressure regulator working to regulate the pressure of the fuel supplied from the low-pressure supply pump to the high-pressure supply pump. The system also includes an abnormal pressure detector working to monitor a preselected parameter that bears a correlation to the energy held by the fuel at an inlet of the high-pressure supply pump to detect whether a pressure of the fuel at the inlet of the high-pressure supply pump is in an abnormal level or not without monitoring it directly.

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