Invention Grant
- Patent Title: Exhaust gas recirculation device of multi-cylinder engine
- Patent Title (中): 多缸发动机废气再循环装置
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Application No.: US13888918Application Date: 2013-05-07
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Publication No.: US09038612B2Publication Date: 2015-05-26
- Inventor: Tatsuya Koga
- Applicant: Mazda Motor Corporation
- Applicant Address: JP Hiroshima
- Assignee: Mazda Motor Corporation
- Current Assignee: Mazda Motor Corporation
- Current Assignee Address: JP Hiroshima
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Priority: JP2012-114629 20120518
- Main IPC: F02M25/07
- IPC: F02M25/07

Abstract:
An exhaust gas recirculation device is provided. The device recirculates, from an exhaust system to an intake system, a part of exhaust gas from a plurality of cylinders of a multi-cylinder engine as EGR gas. The device includes a single EGR pipe extending from the exhaust system toward the intake system, an EGR manifold branching from a downstream end portion of the EGR pipe toward each cylinder, and an EGR valve for adjusting an EGR gas amount. The EGR manifold has one or more common EGR passages having a single pipe portion and branched pipe portions, and one or more independent EGR passages. Each shape of the common and independent EGR passages is set so that a communicating path in the EGR manifold communicating an arbitrary cylinder with a cylinder where combustion is performed subsequently thereto has the same volume for any cylinder combination having the adjacent combustion order.
Public/Granted literature
- US20130306041A1 EXHAUST GAS RECIRCULATION DEVICE OF MULTI-CYLINDER ENGINE Public/Granted day:2013-11-21
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