| 摘要 |
PROBLEM TO BE SOLVED: To surely fix and hold a variable valve gear to a desired intermediate operating angle by a simple configuration for fail-safe or a next start of an internal combustion engine. SOLUTION: A first variable valve train 5 capable of continuously variably controlling an operating angle determines the operating angle by varying the rotating position of a control shaft 32 by an actuator. An engagement hole 54 is formed in the stopper plate 51 of the control shaft 32. A stopper pin 55 projecting when the supply of oil is cut off is installed on a cylinder head. The stopper plate and the stopper are engageable with each other at a predetermined intermediate operating angle. When a system fails, the stopper pin 55 is made to project, the control shaft 32 is temporarily moved to the large operating angle side, and the stopper pin 55 is engaged with the engagement hole 54 by utilizing the gradual return of the control shaft 32 to the small operating angle side by the reaction force of a valve spring. Consequently, the structure of the stopper is simplified. COPYRIGHT: (C)2009,JPO&INPIT
|
