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:
May. 27, 1986
Filed:
Jul. 10, 1984
Ken Mifuji, Aichi, JP;
Norio Shibata, Toyota, JP;
Nippon Soken, Inc., Nishio, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A secondary air supply device for introducing, by utilizing the exhaust gas pulsations, a flow of secondary air into the exhaust gas to after-burn the unburned combustibles comprises a secondary air supply conduit including an inlet section having a reduced flow area and an exit section having an enlarged flow area. This enables an increase of the frequency of resonance of the secondary air supply conduit without reducing the length thereof, so that the amplitude of the pressure pulsation in the secondary air supply conduit is extended to cause the pressure pulsation to occur at least in part in the negative pressure range at a high engine speed, thereby assuring the supply of secondary air even during the high speed operating condition of the engine.