Engine valve train system

Patent · Tue Dec 09 04:00:00 EST 1986

OSTI ID:7010319

Derringer, J G

This patent describes a reciprocating internal combustion engine of the type having an engine block means defining at least one cylinder with an associate pair of ports, a valve located for axial movement in each of the ports with each valve normally biased to a valve closed position relative to its associate port. A rocker shaft support means is fixed to the engine block means, and a valve actuator is spaced from the valves and operable to effect reciprocation of the valves. The improvement described here comprises a rocker shaft pivotably supported by the rocker shaft support means, the rocker shaft having an axial passage adapted to be in continuous flow communication with the pressurized lubricant supply of the engine. It also includes first rocker arm pivotably supported on the rocker shaft in position for engagement with the valve actuator and with one of the valves and actuated in rocking movement whereby it can operate to effect opening and closing movement of one of the valves, and a second rocker arm pivotably supported on the rocker shaft next adjacent to the first rocker arm and operatively engaging the other one of the valves, the second rocker arm having a hydraulic cylinder means therein. A piston is sealingly journaled in the hydraulic cylinder means and located so as to permit engagement of the piston with the first rocker arm, the second rocker arm having a supply/drain passage means therein to the hydraulic cylinder means, and a drain passage which extends to the exterior of the second rocker arm and which is located in circumferentially spaced apart relationship to the supply/drain passage means.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4627391
• OSTI ID: 7010319
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
CONTROL EQUIPMENT
CYLINDERS
DRAINAGE
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
MACHINE PARTS
MECHANICAL STRUCTURES
PISTONS
POSITIONING
SHAFTS
SPACE DEPENDENCE
SUPPORTS
VALVES