Top dead center measurement for reciprocating crank mechanism
Patent 4587839 Issued on May 13, 1986. Estimated Expiration Date: 
July 3, 2004. 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.
July 3, 2004. 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 3820386 Engine operation related event timing system Patent #: 4433572 InventorAssigneeApplicationNo. 06/627409 filed on 07/03/1984US Classes:73/117.2Disparate tests under operating conditionsExaminersPrimary: Myracle, Jerry W.Attorney, Agent or FirmInternational ClassesG01M 15/06 (20060101)G01M 15/04 (20060101) Foreign Application Priority Data1983-07-04 JPAbstractA method or system for measuring the top dead center for a reciprocating crank mechanism, in which a reversible counter performs the additive counting operation from an amount H of shift of the piston of the reciprocating crank mechanism to another amount H of the shift of the piston in a reverse driving direction of the crankshaft of the reciprocating crank mechanism at both sides of a minimum shift of the piston, for each predetermined unit rotational angle deviation of the crankshaft. The reversible counter performs the subtractive counting operation from said another amount H of the shift of the piston in one driving direction of the crankshaft for each one half the predetermined unit rotational angle deviation of the crankshaft. A position of the piston is decided as the top dead center when the counting state of the reversible counter reached zero in said one driving direction of the crankshaft. | |
