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

1985-06-04

1985-12-31

Koczo, Michael

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

045613907

ABSTRACT:
An apparatus for controlling valve timing in an internal-combustion engine. The apparatus includes a pair of telescoping sleeve members. One of the sleeve members is connected to the camshaft of the engine with a bolt, and the other sleeve member is connected to a timing pulley which is connected to the crankshaft of the engine. Each of the sleeve members has at least one slit which is located adjacent to a slit on the other sleeve member. The adjacent slits are angled relative to each other. Abutment rollers are arranged in the slits and are mounted on an axially movable member. The movable member is connected via a screw mechanism to a rotary motor. The rotational movement of the output shaft of the motor is changed to a linear movement of the support member, thereby causing the support member to move, which movement, in turn, causes the generation of angular displacement between the sleeve members so that variable valve-timing is obtained. The output shaft is hollow and is, on the inner end thereof, open to the head portion of the bolt. The other end of the shaft is closed with a plug.

REFERENCES:
patent: 1632223 (1927-06-01), Fey
patent: 2682260 (1954-06-01), Lantz
patent: 3978829 (1976-09-01), Takahaski et al.

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