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:
Mar. 05, 2013
Filed:
Jul. 01, 2010
Takanobu Ichihara, Tsuchiura, JP;
Kazuhiko Kanetoshi, Hiatchinaka, JP;
Kouzou Katogi, Hitachi, JP;
Hiroaki Hoshika, Hitachiomiya, JP;
Takanobu Ichihara, Tsuchiura, JP;
Kazuhiko Kanetoshi, Hiatchinaka, JP;
Kouzou Katogi, Hitachi, JP;
Hiroaki Hoshika, Hitachiomiya, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
An EGR flow rate control apparatus of an internal combustion engine is provided that can correct with high accuracy an EGR gas flow rate measured by a gas flow rate measurement apparatus in an EGR passage and control with high accuracy a gas flow rate regulating valve to reduce discharge amounts of PM and NOx in exhaust gases. An EGR flow rate control apparatusof an internal combustion engine includes a gas flow rate correction unitthat corrects the EGR gas flow rate based on a first operating state parameter relating to pressure fluctuations of the intake pipe or exhaust pipe of the internal combustion engine and a second operating state parameter relating to a flow channel resistance of the EGR flow channel.