VALVE TIMING CONTROL DEVICE FOR ENGINE

Japanese Patent JPH02298614

A

PURPOSE:To obviate a lack of lubrication for a cam shaft bearing part even though such a condition that no hydraulic pressure acts upon a valve timing changing mechanism is continued, by allowing the changing mechanism to change over hydraulic pressure during a predetermined limited operation even under nonspecific operation. CONSTITUTION:Engine lubricating oil is introduced into a valve timing changing mechanism A mounted on a cam shaft C in an engine E through a cam shaft bearing part B. Further, during specific operation, a hydraulic change-over mechanism D disposed in an oil supply passage F is changed over so as to allow hydraulic pressure to act upon the changing mechanism A, and accordingly, a means G changes the valve timing. In this arrangement, even during operation other than the above-mentioned specific operation, a lubrication changeover means H changes over a hydraulic pressure change-over means D so that hydraulic pressure acts upon the changing mechanism A. With this arrangement, it is possible to eliminate a lack of lubrication for the cam shaft bearing part B even though such a drive condition that no hydraulic pressure acts upon the changing mechanism A is continued for a long time.

JPH04121410	[Title of the device] A lubricating device of the valve train cam in the moving valve mechanism of a Overhead valve vertical form engine
JP4697121	Chain refueling device
JP2017172708	LUBRICATION STRUCTURE OF TIMING CHAIN, AND ENGINE

NISHIKAWA TOSHIO
HITOMI MITSUO
SASAKI JUNZO
FUJIMOTO HIDEFUMI

JP11784889A

December 11, 1990

May 11, 1989

Click for automatic bibliography generation  

MAZDA MOTOR

F01M9/10; F01L1/34; F01L1/46; F01L13/00; F02D13/02; (IPC1-7): F01L1/34; F01L1/46; F01L13/00; F01M9/10

Seiji Yanagida (1 person outside)

Previous Patent: VALVE TIMING CONTROL DEVICE FOR VEHICLE INTERNAL COMBUSTION ENGINE

Next Patent: VALVE TIMING CONTROL DEVICE FOR ENGINE