Modular, self-contained hydraulic valve timing systems for internal combustion engines

Patent · Tue Dec 19 04:00:00 EST 1989

OSTI ID:6966573

Wakeman, R J

A modular self-contained hydraulic variable valve timing system for use with an internal combustion engine of the type having an engine block which includes a rotatable cam shaft, and sets of intake and exhaust valves respectively operatively associated with combustion cylinders of the engine. The modular self-contained variable valve timing system comprising: a valve cover adapted to being coupled to the engine block in covering relationship to the intake and exhaust valves. The valve cover having an integral case. The case including a first open-ended bore in opposing relationship to a cam of the cam shaft, and a second open-ended bore in opposing relationship to a valve stem of one of the intake and exhaust valves, and means which fluid-connect the first and second bores so as to establish a hydraulic transfer path therebetween; cam follower piston means received within, and closing, the first bore for following a profile of the cam and being reciprocally displaced within the first bore in response thereto; valve actuating piston means received within, and closing, the second bore and being in opposing relationship to the stem associated with the one valve; a control passageway in fluid communication with the hydraulic transfer path; and solenoid valve means fluid-connected to the control passageway and having first and second operative states for variably controlling timing and duration of the one valve opening.

• Assignee: Siemens Bendix Automotive Electronics L.P., Troy, MI
• Patent Number(s): A; US 4887562
• Application Number: PPN: US 7-250180A
• OSTI ID: 6966573
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
OPERATION
PISTONS
SHAFTS
SOLENOIDS
TIMING PROPERTIES
VALVES