Controller of pressure accumulation fuel system
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United States of America Patent
Stats
-
Apr 29, 2008
Grant Date -
May 10, 2007
app pub date -
Nov 6, 2006
filing date -
Nov 4, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A common rail fuel injection system has a fuel pump, a common rail, and an injector. The injector injects high-pressure fuel supplied from the common rail into an engine and leaks part of the high-pressure fuel. An electronic control unit (ECU) restricts a heat amount of the leak fuel of the injector based on a remaining amount of the fuel in a fuel tank. At that time, a target value of the fuel pressure in the common rail is changed to a lower value and the restriction of the fuel pressure is performed with the changed target value. Thus, decrease in generation torque of the engine against intension of a driver can be inhibited while protecting components such as the fuel injection valve.
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