Roller camshaft for internal combustion engine

Details Roller camshaft for internal combustion engine Roller camshaft for internal combustion engine

1996-05-24

1997-12-09

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Rod

123 9034, 74567, F01L 104

Patent

active

056948921

ABSTRACT:
A roller camshaft for actuating cylinder poppet valves of an internal combustion engine includes a carrier shaft adapted for rotation by an engine crankshaft. The camshaft may be equipped with more than one cam lobe, with each lobe having a base circle portion, an acceleration ramp, a deceleration ramp, a tappet contacting roller housed in a socket positioned at a nose of the lobe, a leading transition ramp located adjacent both the acceleration ramp and the roller, and a trailing transition ramp located adjacent both the deceleration ramp and the roller.

REFERENCES:
patent: 4644912 (1987-02-01), Umeha t al.
patent: 5161429 (1992-11-01), Elrod et al.
patent: 5186129 (1993-02-01), Magnan et al.
patent: 5253546 (1993-10-01), Elrod et al.

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