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:
Jan. 07, 2003
Filed:
Feb. 12, 2001
Masatoshi Hoshino, Tsuchiura, JP;
Nobuo Kurihara, Hachinohe, JP;
Minoru Osuga, Hitachinaka, JP;
Toshiharu Nogi, Hitachinaka, JP;
Yutaka Takaku, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A combustion control device for an internal combustion engine, establishes an optimum combustion condition by detecting the combustion pressure in the cylinder and controlling the exhaust gas reflux rate, the ignition timing and the fuel injection timing or the injection rate at the intake stroke in order to improve the fuel economy and the quality of the exhaust gas in the engine. The device is provided with an in-cylinder pressure detector for detecting the in-cylinder pressure in connection with the combustion in the engine, and apparatus for estimating the heat generation rate with respect to the angle of the crank shaft of the cylinder according to the output from the in-cylinder pressure detection means, the ignition timing and the fuel injection timing control the control variables such as EGR control parameters related to the combustion so that the in-cylinder combustion state pattern obtained by the heat generation rate estimation apparatus may be reshaped into a predefined waveform pattern.