Title:
内燃機関の排気環流装置
Document Type and Number:
Japanese Patent JP5817846
Kind Code:
B2
Abstract:
An object of this invention is to provide an exhaust circulation apparatus for an internal combustion engine that, in an internal combustion engine that performs homogeneous combustion, can improve fuel consumption and suppress the amount of discharged NOx by expanding an operating region in which homogeneous lean combustion is possible. The exhaust circulation apparatus includes homogeneous lean combustion means for performing homogeneous lean combustion in a predetermined lean-burn region, and an EGR apparatus for performing EGR that recirculates a portion of gas that flows through an exhaust system of the internal combustion engine to an intake system. When performing homogeneous lean combustion, the exhaust circulation apparatus controls the EGR apparatus to perform EGR. An LPL-EGR apparatus that recirculates gas flowing through an exhaust passage on a downstream side of a turbine to an intake passage on an upstream side of a compressor is used as the EGR apparatus. Preferably, an air-fuel ratio is controlled so as to be 22 and an EGR rate is controlled so as to be between 10% and 20%.
Inventors:
Shinichiro Nogawa
Application Number:
JP2013555036A
Publication Date:
November 18, 2015
Filing Date:
January 24, 2012
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D21/08; F02D23/00
Domestic Patent References:
| JP2009002190A | ||||
| JP11117785A | ||||
| JP2009250099A |
Attorney, Agent or Firm:
Hideki Takahashi
Mamoru Takada
Hidekazu Onishi
Mamoru Takada
Hidekazu Onishi