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:
Jun. 28, 2016
Filed:
Dec. 02, 2013
Aisan Kogyo Kabushiki Kaisha, Obu-shi, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Hiroshi Asanuma, Chita, JP;
Yoshimasa Ito, Mie-gun, JP;
Kazumasa Nakashima, Nagoya, JP;
Takashige Inagaki, Obu, JP;
Tomoyuki Noguchi, Nisshin, JP;
Takashi Tomita, Toyota, JP;
Junji Torishima, Toyota, JP;
Taro Furukubo, Nagoya, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
In an EGR valve, a valve element is moved with respect to a valve seat to adjust a passage section width of a measuring section, thereby regulating an EGR gas flow rate in a passage. The valve seat includes a valve hole, a first end face facing to a downstream side of the passage and a second end face facing to an upstream side of the passage. The inner circumferential surface of the valve hole has a concave curved shape with an inner diameter gradually increasing toward the second end face. The valve element is placed inside the valve hole to be movable in between a fully closed position and a fully open position. While the valve element is placed in the fully open position, passage section widths of parts of the measuring section in an EGR gas flow direction are approximate to each other.