Adjustable valve system for a multi-valve internal combustion engine
January 31, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1121245 1172358 1659528 3618573 Variable valve timing system for internal combustion engine Valve operating mechanism for internal combustion engines Device for transmitting movement Device for regulating the axial position of a variable-profile camshaft, in particular, for controlling the timing system on an engine Valve train arrangement for multi-valve engine Rocker arm arrangement for multi-valve internal combustion engine InventorApplicationNo. 189325 filed on 01/31/1994US Classes:123/90.16, Cam-to-valve relationship123/90.18, Axially shiftable camshaft123/90.22, Plural valve trains, single actuator123/90.4, Plural valves123/90.42Rotation preventionExaminersPrimary: Yuen, Henry C.Assistant: Lo, Weilun Attorney, Agent or FirmForeign Patent References
International ClassesF01L 001/0890.45 90.6 AbstractAn adjustable valve system for an engine (10) includes an axially shiftable camshaft (14) for connection to a source (24) of rotary power The shaft has at least one valve-actuating cam (28) with a lobe profile which varies along the axis of the camshaft (14). The system also includes a positioning mechanism (42) for controlling the axial position of the camshaft in said engine. A plurality of valves (36) control fluid communication with said engine (10). The system further includes a rocket (34) having contact portions which operatively engage the plurality of valves (36), mounting means (46) disposed in the engine for supporting the rocker and a cam follower (32) mounted on the rocker in rolling engagement with the cam (28). Exclusive pivots (46a, 58) are provided which permit the follower (32) and/or the rocker (34) to pivot relative to said engine (10) about two axes (A1,A2), one of which is generally parallel to the camshaft (14) and the other of which is generally perpendicular to that shaft so that when the camshaft (14) is rotated, the follower (32) maintains line contact with the cam (28). | |
