Variable valve-timing apparatus in an internal-combustion engine

Details Variable valve-timing apparatus in an internal-combustion engine Variable valve-timing apparatus in an internal-combustion engine

1982-11-23

1985-02-12

Koczo, Michael

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

044984316

ABSTRACT:
An apparatus for controlling valve timing in an internal-combustion engine. The apparatus includes a pair of coaxial sleeves, one inserted into the other. One of the sleeves is connected to a camshaft of the engine, and the other sleeve is connected to a timing pulley which is connected to the crankshaft of the engine. One of the sleeves has diametrically opposite slits while the other sleeve has diametrically opposite slits located adjacent to the respective slits in the one sleeve. The adjacent slits are skewed with respect to each other. Roller-bearing units are arranged in the slits and are mounted on an axially slidable slider. The slider is connected via a screw mechanism to a rotary motor. The rotational movement of the motor is changed to a linear movement of the slider, thereby causing the slider to move, which movement, in turn, causes the generation of angular displacement between the sleeves so as to obtain a variable valve timing.

REFERENCES:
patent: 1632223 (1927-06-01), Fey
patent: 2682260 (1954-06-01), Lantz
patent: 3626720 (1971-12-01), Meacham et al.
patent: 3685499 (1972-08-01), Meacham et al.
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4279131 (1981-07-01), Pringle

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