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:
May. 15, 2018
Filed:
May. 21, 2014
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Daisuke Takaki, Kanagawa, JP;
Hirofumi Tsuchida, Kanagawa, JP;
Kazuhiko Sugawara, Kanagawa, JP;
Kenji Suzuki, Kanagawa, JP;
Takayuki Sui, Kanagawa, JP;
NISSAN MOTOR CO., LTD., Yokohama-shi, JP;
Abstract
An EGR control device includes an estimate EGR ratio calculating portion adapted to calculate an estimate EGR ratio from a fresh air flow amount at a joining portion with the EGR passage of an intake passage and an EGR gas amount passing through the EGR valve, and a joining portion EGR ratio estimating portion adapted to correct an estimate EGR ratio on the basis of a gaseous state inside the introduction passage when the EGR valve switches from a closed state to an open state, to calculate a joining portion EGR ratio being a proportion of an EGR gas amount with respect to fresh air in the joining portion.