Magnetically coupled fuel injector pump

Details Magnetically coupled fuel injector pump Magnetically coupled fuel injector pump

2005-01-11

2005-01-11

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

Reexamination Certificate

active

06840229

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 coils (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 operated 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.

REFERENCES:
patent: 5507266 (1996-04-01), Wright et al.

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