Fuel supply pump having inner lubricating groove

Details Fuel supply pump having inner lubricating groove Fuel supply pump having inner lubricating groove

2006-09-19

2006-09-19

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C417S366000

Reexamination Certificate

active

07107967

ABSTRACT:
A fuel supply pump includes a housing, a camshaft and a cam ring. The camshaft is rotatably supported in the housing. The cam ring is supported around a cam portion of the camshaft such that the cam ring is rotatable with respect to the cam portion. A washer member is provided between an axial end face of the cam portion and the housing, so that the cam portion and the camshaft is axially aligned. A bearing is circumferentially inserted between the end face of the cam portion and the cam ring. An axial end face of the cam ring defines oil grooves, so that lubricating oil flows from a cam chamber into a gap, which is formed between the cam portion and the bearing. Lubricating oil is sufficiently supplied to the periphery of the cam portion, so that the camshaft can be protected from seizure in the fuel supply pump.

REFERENCES:
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patent: 4492545 (1985-01-01), Mochizuki et al.
patent: 5273408 (1993-12-01), Yuge
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patent: 6241484 (2001-06-01), Hiltemann
patent: 6345609 (2002-02-01), Djordjevic
patent: 6503068 (2003-01-01), Kojima et al.
patent: 6615799 (2003-09-01), Mori et al.
patent: 6722864 (2004-04-01), Suzuki et al.
patent: 2003/0108443 (2003-06-01), Suzuki et al.
patent: 2-99757 (1990-04-01), None

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