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:
Sep. 22, 1987
Filed:
Oct. 15, 1985
Shizuo Yagi, Asaka, JP;
Yoshiaki Hirosawa, Shiki, JP;
Makoto Kawai, Tokorozawa, JP;
Isao Fujii, Hasuda, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An ignition timing control system for an internal combustion engine includes a crank angle detector for producing a first pulse signal indicative of a reference crank angle position of the crankshaft and a second pulse signal indicative of a crank angle position that changes constantly with rotation of the crankshaft, an ideal crank angle detector for producing an output signal based on the first and second pulse signals and indicative of an ideal crank angle position at which pressure internal of the engine cylinder attains a peak value, pressure sensing means for producing an output signal indicative of the peak pressure value, a phase difference detector for producing an output signal indicative of the phase difference between the ideal crank angle position signal and the peak pressure value signal, first ignition timing control means for producing an output signal indicative of optimum ignition timing which is in accordance with the phase difference output signal, and second ignition timing control means for controlling ignition timing to a fixed value during actuation of the engine starter.