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:
Oct. 22, 1996
Filed:
Dec. 08, 1995
Katsuharu Hosoe, Okazaki, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An ignition control for an internal combustion engine accurately determines current engine operational status (acceleration or deceleration) and controls optimally ignition timing. The exemplary system includes a microcomputer, drive circuits for driving ignition coils from outputs of the microcomputer, and a waveform shaping circuit for shaping signal pulses from a crank angle sensor before into the microcomputer. The microcomputer calculates changes in engine speed from wave-shaped signal pulses and determines acceleration rate relative to the maximum attainable acceleration from the speed changes. The microcomputer controls the ignition timing based on the determined acceleration rate. Thus, a complicated throttle link or throttle opening sensor is not necessitated to perform acceleration responsive engine control.