Valve timing control system for internal combustion engine

Patent · Tue Apr 15 04:00:00 EST 1986

OSTI ID:5688724

Masuda, S; Morita, Y; Oda, H

This patent describes an internal combustion engine having a camshaft, having an axis of rotation, bearing thereon a cam and a tappet member which transmits the movement of the cam to the stem of a valve to open and close the valve in a timed relation, a valve timing control system comprising a swinging member which is mounted for pivotal movement about the axis of rotation of the camshaft and is provided with a tappet receiving hole for receiving the tappet member to permit sliding movement of the tappet member therein to transmit the movement of the cam to the valve stem, and a control device which swings the swinging member together with the tappet member received in the tappet receiving hole according to the operating condition of the engine so that the relative position of the tappet member to the cam at a given angular position of the camshaft is changed. The tappet member has a cam abutting surface at one end and a valve stem abutting surface at the other end. The valve stem abutting surface is arcuately convex toward the valve, the center of curvature thereof being on the axis of rotation of the camshaft.

• Assignee: Mazda Motor Corp., Tokyo
• Patent Number(s): US 4582029
• OSTI ID: 5688724
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MOTION
OPERATION
POSITIONING
ROTATION
SHAFTS
TIME DEPENDENCE
VALVES