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:
Jul. 28, 2009
Filed:
Feb. 11, 2008
Katsuhiro Furuta, Okazaki, JP;
Daisuke Chino, Okazaki, JP;
Kenji Saito, Nagoya, JP;
Hitoshi Kamura, Okazaki, JP;
Akihiro Iwama, Okazaki, JP;
Akira Tsunooka, Kariya, JP;
Katsuhiro Furuta, Okazaki, JP;
Daisuke Chino, Okazaki, JP;
Kenji Saito, Nagoya, JP;
Hitoshi Kamura, Okazaki, JP;
Akihiro Iwama, Okazaki, JP;
Akira Tsunooka, Kariya, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
When the opening angle of an intake control valve is limited to a given opening angle by fuel cut, an EGR apparatus is activated, and a malfunction of the EGR apparatus is diagnosed on the basis of a change in intake manifold pressure before and after the activation of the EGR apparatus. When the control for reducing the intake-manifold negative pressure is not implemented, the change of the intake manifold pressure is corrected with a changing amount of first reference intake pressure (P(Ne)) changed by engine speed Ne. When the control for reducing the intake manifold genitive pressure is implemented, the change of the intake manifold pressure is corrected with a changing amount of second reference intake pressure (P(Ne)) changed by engine speed Ne.