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:
Nov. 17, 1987
Filed:
Nov. 13, 1986
Toshihide Nishikawa, Hiroshima Prefecture, JP;
Kenichirou Hanada, Hiroshima Prefecture, JP;
Yukinobu Nishimura, Himeji City, JP;
Setsuhiro Shimomura, Himeji City, JP;
Mazda Motor Corporation, both of, JP;
Mitsubishi Denki Kabushiki Kaisha, both of, JP;
Abstract
A novel and improved fuel-injection control system for an internal combustion engine capable of effecting minute or fine revisions of acceleration of an engine by appropriately processing an output signal from an AFS without employing a throttle sensor for detecting the opening degree of a throttle valve. The width of a basic injection pulse is calculated from the amount of intake air sucked into an internal combustion engine and the number of engine revolutions so that between the injection pulses synchronized with the number of engine revolutions, a series of special injection pulses having the calculated pulse width are generated for revision of engine acceleration. The fuel-injection control system comprises: an arithmetic operation means for calculating an engine load from the amount of intake air sucked into the engine and the number of engine revolutions; a judging means for judging whether or not a parameter representative of the engine load is less than a predetermined reference value; a first pulse-generating means adapted to generate a first special injection pulse in response to the amount of the suction air when the judging means judges that the parameter is less than the predetermined reference value; a second pulse-generating means adapted to revise the engine acceleration outside a pulsation range in which the amount of the intake air pulsates during a first predetermined period of time starting from the generation of the first special injection pulse and to generate a series of special injection pulses; and a revision-prohibiting means for prohibiting the revision of engine acceleration in the pulsation range of the intake air during a second predetermined period of time exceeding the first predetermined period starting from the generation of the first special injection pulse.