MAGNETICALLY COUPLED FUEL INJECTOR PUMP
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United States of America Patent
Stats
-
Jan 11, 2005
Grant Date -
Jan 13, 2005
app pub date -
Aug 13, 2001
filing date -
Aug 14, 2000
priority date (Note) -
Granted
status (Latency Note)
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Abstract
A pump (10) of high pressure direct injection fuel supply system is connected to the engine through a magnetic clutch which includes a motorizing function. The magnetic clutch comprises rotating electromagnetic cogs (20) attached to and driven by the engine and rotating permanent magnets (34) attached to and driving the pump. The slippage of the clutch is controlled by the on-off cycle of electrical power which is simultaneously supplied to all of the electromagnetic coils and may be responsive to the pressure in the fuel injections rail. The clutch may be op as an electrical motor by sequentially activating the electromagnetic coils for the purpose of providing fuel pressure even prior to rotation or cranking of the engine. An isolation barrier hermetically seals the fuel injection pump from the engine.
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