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:
Mar. 16, 1993
Filed:
Mar. 09, 1992
Masashi Ohmori, Hiroshima, JP;
Yasuhiro Harada, Hiroshima, JP;
Shinichi Wakutani, Hiroshima, JP;
Hiroshi Ebino, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
In an automotive power plant including a combustion engine, intake and exhaust passages communicated with a combustion chamber for an introduction of an air-fuel mixture into and a discharge of exhaust gases from the combustion chamber, respectively, a fuel injector for injecting a controlled amount of fuel into the combustion chamber together with air sucked through the intake passage, and a throttle valve of which opening is adjustable for controlling the flow of the air through the intake passage, a fuel control system for determining the amount of fuel to be injected into the combustion chamber in dependence on the amount of air being sucked. The fuel control system includes a throttle sensor for detecting the opening of the throttle valve; and a control unit operable to determine a first fuel decrement in dependence on the amount of fuel injected at the start of a decrease in throttle opening during a deceleration of the engine when the throttle sensor detects the decrease in throttle opening at a speed higher than a predetermined value and regardless of a speed of movement of the throttle valve; to interrupt the determination of the first fuel decrement when the rate of change of the throttle valve attains a zero value; and thereafter to determine a second fuel decrement in dependence on a change in load on the engine.