Method and system for controlling pressure in a high pressure fuel pump supplying an internal combustion engine
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United States of America Patent
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Sep 10, 2002
Grant Date -
N/A
app pub date -
Oct 29, 2001
filing date -
Feb 26, 1999
priority date (Note) -
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Abstract
The control of the pressure in the high-pressure circuit (22) downstream from the pump (11) consists of controlling the solenoid valve (18) at the inlet of the pump (11) so that the fuel mass delivered by the pump (11) into the circuit (22) is equal to the algebraic sum of a fuel mass to be injected into the engine (1) and a fuel mass required to at least partially compensate a pressure difference between the fuel pressure measured by the sensor (4) in the circuit (22) and a target pressure desired by the control unit (5) in the circuit (22). Applies to pressure control for direct fuel injection into engines, particularly with externally supplied ignition.
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