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:
Jun. 12, 1979
Filed:
Feb. 14, 1978
Applicant:
Inventor:
Yasunori Mori, Katsuta, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
1231 / ; 1231 / ; 123 / ; 123 / ; 123 / ; 123 / ; 364431 ;
Abstract
Method and apparatus for controlling the spark timing of an internal combustion engine is provided, wherein the output of a sensor for detecting the state of a means affecting the engine operation is detected prior to engine start, and the detected value is stored as an initial value. After engine start, the output of the sensor for detecting the state of the means affecting the engine operation is again detected, and this detected value is corrected by the stored initial value. On the basis of the corrected detected value, a command value of ignition point in time (command ignition timing) is calculated and used to control ignition timing.