The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 1989
Filed:
Apr. 13, 1989
Noriyuki Kishi, Tokyo, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of controlling the operation of engine valves in an internal combustion engine, dependent on the rotational speed of the engine, by controlling a valve operation changing mechanism capable of opening and closing the engine valves selectively in a low-speed mode of operation corresponding to low-speed operation of the engine and a high-speed mode of operation corresponding to high-speed operation of the engine, the method includes the steps of determining the rotational speed of the engine at which the output torque produced by the engine when the valve operation changing mechanism is in the low-speed mode of operation and the output torque produced by the engine when the valve operation changing mechanism is in the high-speed mode of operation are of a certain relationship to each other and selecting a switching rotational speed for switching operation of the valve operation changing mechanism based on said determined engine rotational speed.