Timing apparatus for a four-stroke engine with camshafts running

Details Timing apparatus for a four-stroke engine with camshafts running Timing apparatus for a four-stroke engine with camshafts running

1992-06-11

1993-04-06

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 134

Patent

active

051993937

ABSTRACT:
Timing apparatus for a four-stroke engine with at least a shaft (2) of cams (7) located over the head of the cylinders and with the cams (7) acting directly on the valves (4), wherein the rotary motion of each shaft (2) of cams (7) is derived from a transmission shaft (1) parallel to the camshaft and driven by the engine crankshaft through a pair of identical gears (3,30) which are eccentrically keyed, one (3) on the transmission shaft (1) and the other (30) on the shaft (2) of cams (7), and are also 180.degree.-out-of-phase to one another, and with the cam (7) which is provided for the opening of the relevant valve (4) keyed on the shaft (2) of cams (7) having the maximum radius (r2) lift in phase with the minimum radius (R2) of rotation of the corresponding gear (30) eccentrically keyed on he same shaft (2) of cams (7).

REFERENCES:
patent: 3633555 (1972-01-01), Raggi
patent: 4505235 (1985-03-01), Mitchell
patent: 5074260 (1991-12-01), Yagi et al.
patent: 5080053 (1992-01-01), Parsons
patent: 5107802 (1992-04-01), Yagi et al.

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