Fuel feed pump for internal combustion engines
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United States of America Patent
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Aug 29, 2006
Grant Date -
Sep 9, 2004
app pub date -
Mar 12, 2004
filing date -
Mar 14, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fuel feed pump is provided that has a fuel flow-rate regulating valve, on the inlet side. The fuel flow-rate regulating valve includes a housing with a fuel inlet port and a fuel outlet port, a valve mechanism for controlling the flow rate of the fuel from the inlet port to the outlet port, and a regulating mechanism for regulating a backpressure to control the position of a needle valve of the valve mechanism in response to a system pressure, to thereby control the flow rate by controlling the fuel flow through an opening provided in a valve chamber. This arrangement makes it difficult for contamination to accumulate, and also enables a low-cost implementation.
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