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:
Sep. 18, 2012
Filed:
Nov. 28, 2008
Akira Nakawatase, Toyota, JP;
Taketo Nagasaki, Aichi-ken, JP;
Junji Watanabe, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
High pressure regions (H toH) and low pressure regions (L toL) are created based on the exhaust gas flow at curves in an EGR pipe (), thereby enabling the exhaust gas pressure at inlets (to) of gas introduction passages (to) to be adjusted. Accordingly, regardless of the number of cylinders or whether the lengths of the flow paths of the EGR pipe () are the same, the exhaust pressure at the inlets (to) of the gas introduction passages (to) can be appropriately adjusted so any difference in pressure of exhaust gas introduced into branch pipes (to) can be reduced. In this way, the EGR rates of the cylinders can be made closer or the same such that stable combustion can be achieved, thus enabling stable engine operation to be maintained. The EGR pipe () is arranged weaving closely between the branch pipes (to) so space efficiency can be improved and a sufficient amount of exhaust gas can be introduced evenly into the cylinders.