Patent Number: 6,305,336

Title: Electromagnetic driving device of engine valve for internal combustion engine

Abstract: An electromagnetic driving device of engine valve for internal combustion engine comprising an electromagnetic deriving mechanism includes a first and second electromagnets positioned opposite each other, an armature disposed in a gap formed between the electromagnets for moving therebetween, a follower having a first and second followers that are positioned opposite each other is for moving in relation to the armature, a valve associated with the armature for closing and opening an intake or exhaust passage, a first and second cams having gradually varied their profile are pivoted for contacting respective the first and second followers, a spring is disposed between the follower and the cams for urge the first and second cams toward the first and second followers, respectively. Thereby, the armature is prevented from colliding the electromagnet, and the valve capable of seating a valve seat smoothly and gently, so that the valve is possible to indicate an ideal valve lift characteristic at the end period of the valve. Therefore, this invention is possible to prevent noise, wearing and damage caused by the collision between the valve and the valve seat and between the armature and the electromagnet.

Inventors: Hara; Seinosuke (Kanagawa, JP), Todoroki; Katsuhisa (Kanagawa, JP), Yamada; Yoshihiko (Kanagawa, JP), Hibi; Tsutomu (Kanagawa, JP)

Assignee: Unisia Jecs Corporation

International Classification: F01L 9/04 (20060101); F01L 009/04 ()

Expiration Date: 10/23/2018