Toyota Jidosha Kabushiki Kaisha

Koyo Seiko Kabushiki Kaisha

Minoru Kohigashi

Norihiko Nakamura

Toyokazu Baika

Toshio Miki

An apparatus for controlling valve timing in an internal combustion engine. The apparatus includes a pair of sleeves inserted into each other. One of the sleeves is connected to a camshaft of the engine. 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 have central lines which are skewed with respect to each other. Roller-bearing units are arranged in the slits and are mounted on an axially slidable slider. Movement of the slider causes the generation of angular displacement between the sleeves so as to obtain a variable valve timing.

Growing community of inventors

Chiryu, Japan

Minoru Kohigashi