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. 05, 2000
Filed:
Oct. 02, 1998
Ken Tachibana, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In an internal combustion engine of a cylinder injection type, a fuel injection control system for controlling fuel injection/combustion effected during an expansion stroke or an exhaust stroke of the engine in order to heat a catalyst to a light-on temperature as soon as possible in an engine starting phase while protecting the catalyst against degradation/dissolution and ensuring purification of exhaust gas at an earlier stage regardless of changes in the ambient temperature and the state of a motor vehicle prevailing when the engine is restarted from the cold state or when the engine is restarted after having been stopped in the warmed-up state and additionally proper temperature rise as well as prevention of discharge of unburnt gas. The system includes fuel injection valves (47 to 50) capable of injecting fuel under high pressure directly into combustion chambers (24, 26, 28, 30) of an engine (10), an engine start detecting means for detecting starting of the engine (10), a temperature detecting means (55) for detecting temperature (T.sub.W) of the engine (10), and an engine low-temperature state detecting means (22) for detecting whether or not the engine is at a low temperature by comparing a detected value (T.sub.W) derived from output of the temperature detecting means (55) with a predetermined value stored previously.