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:
Apr. 25, 2006
Filed:
Feb. 20, 2004
Kunihiro Tsuzuki, Obu, JP;
Shinichi Yokoyama, Gifu, JP;
Kunihiro Tsuzuki, Obu, JP;
Shinichi Yokoyama, Gifu, JP;
Denso Corporation, , JP;
Abstract
In the disclosed secondary air supply system, an on-off valve () is driven by the discharge pressure of an air pump (). A diaphragm chamber () is arranged in the neighborhood of a discharge outlet (), and a part of the discharge air flows directly into the diaphragm chamber (). Thus, the on-off valve () is positively operated even at high places with low atmospheric pressure and has a fast open/close response. As an electromagnetic actuator is not used to drive the on-off valve (), the voltage supplied to the air pump () (DC motor ()) does not drop inconveniently, and at the same time, the cost is reduced. Further, the number of the lead wires () is reduced.