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. 01, 2008
Filed:
Sep. 20, 2006
Ken Ogawa, Saitama-ken, JP;
Toru Kitamura, Saitama-ken, JP;
Atsushi Umemoto, Saitama-ken, JP;
Toshinari Shinohara, Saitama-ken, JP;
Mitsuru Sugimoto, Saitama-ken, JP;
Tetsuaki Nakano, Saitama-ken, JP;
Ken Ogawa, Saitama-ken, JP;
Toru Kitamura, Saitama-ken, JP;
Atsushi Umemoto, Saitama-ken, JP;
Toshinari Shinohara, Saitama-ken, JP;
Mitsuru Sugimoto, Saitama-ken, JP;
Tetsuaki Nakano, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An EGR control system that is capable of controlling the amount of recirculation of high-temperature and low-temperature recirculated gases, with high accuracy, to thereby improve the control accuracy of in-cylinder temperature. An ECU of an ERG control system calculates a fresh intake air ratio, and sets a target value of the fresh intake air ratio. The ECU calculates a feedback correction coefficient for converging the fresh intake air ratio to the target value, with an I-PD control algorithm, and sets an external EGR ratio and an internal EGR ratio. The ECU controls the EGR amount whose ratio is the larger, according to the larger one of the two ratios and the feedback correction coefficient, and controls the EGR amount whose ratio is the smaller, according to the smaller of the ratios and the learned value thereof.