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. 12, 2017
Filed:
Oct. 03, 2014
Yanmar Co., Ltd., Osaka-shi, Osaka, JP;
Atsuhito Iwase, Osaka, JP;
Yusuke Amari, Osaka, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
Provided is an engine which is provided with an EGR device, wherein: an actual intake/exhaust gas pressure ratio πof an intake-gas pressure Pto an exhaust-gas pressure Pis calculated from the detected exhaust-gas pressure Pand the detected intake-gas pressure P; an estimated intake/exhaust gas pressure ratio πof the intake-gas pressure Pto the exhaust-gas pressure Pis calculated from an engine rotational frequency N, and a fuel injection amount F; and, in cases when the actual intake/exhaust gas pressure ratio πis less than a prescribed value π, an EGR gas weight Megr is calculated based on the actual intake/exhaust gas pressure ratio π, and in cases when the actual intake/exhaust gas pressure ratio πis equal to or more than the prescribed value π, the EGR gas weight Megr is calculated based on the estimated intake/exhaust gas pressure ratio π