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:
Apr. 03, 2001
Filed:
Oct. 27, 1999
Masayuki Yamashita, Kyogo, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A control system for a compression ignition type diesel engine includes an operating state detecting unit for detecting the operating state of the diesel engine. A combustion mode selecting unit selects, in correspondence with the output of the operating state detecting unit, a first combustion mode, wherein fuel injection is carried out in the first half of the compression stroke, or a second combustion mode, wherein fuel injection is carried out at around compression top dead center. An effective compression ratio varying unit varies the effective compression ratio of the diesel engine and a control unit controls the effective compression ratio varying unit to lower the effective compression ratio when the first combustion mode is selected by the combustion mode selecting unit compared to when the second combustion mode is selected. When the first combustion mode is selected by the combustion mode selecting unit, by fuel injection being carried out in the first half of the compression stroke and the effective compression ratio being lowered so that compression ignition occurs at around compression top dead center, a uniform highly diffuse premix combustion can be realized. When the second combustion mode is selected by the combustion mode selecting unit, by fuel injection being carried out at compression top dead center and ignition occurring at around compression top dead center substantially simultaneously with fuel injection, without the effective compression ratio being lowered, diffusion combustion is realized.