Fuel injection system for internal combustion engines
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United States of America Patent
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Jul 10, 1990
Grant Date -
N/A
app pub date -
Mar 6, 1989
filing date -
Jul 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel injection system for an internal combustion engine and a method of controlling fuel injection according to which a predetermined fuel quantity is delivered from a high-pressure pump to the internal combustion engine, first and second return flow quantity are returned through first and second relief ducts, the second relief duct including a control throttle having a constant cross-section, and an electronic control unit controls flow delivery in accordance with characteristic values including those of the internal combustion engine, the pump, and a quantity measuring device for measuring the second return flow, and in accordance with the predetermined fuel delivery quantity also used as a characteristic value.
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