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Patent Searching and Data


Title:
EXHAUST GAS CIRCULATING DEVICE
Document Type and Number:
Japanese Patent JPH11141407
Kind Code:
A
Abstract:

To provide an exhaust gas circulating device for increasing an EGR amount by increasing an exhaust flow passing through an exhaust gas circulating passage bypassing an EGR cooler at the time of a low load operation requiring a large amount of EGR.

A first valve 23 is arranged, which regulates an exhaust gas amount in an exhaust gas circulating passage 21 by which a part of exhaust gas is refluxed to an intake passage through the exhaust gas circulating passage 21, and an EGR cooler 22 is arranged, which is arranged in this exhaust gas circulating passage 21 and cools exhaust gas. A second valve 25 regulating the exhaust gas amount passed though the inside of a passage, is arranged in an exhaust gas circulating passage 24 which is arranged in parallel with the exhaust gas circulating passage 21 and circulates exhaust gas to an intake system. The first valve 23 is controlled according to the operating condition of an engine, and also, in the case that the first valve 23 is approximately fully opened, the second valve 25 is controlled on the basis of an air excessive rate or a parameter which can adjust the air excessive rate.


Inventors:
SHIGAHARA MEGUMI
Application Number:
JP30879897A
Publication Date:
May 25, 1999
Filing Date:
November 11, 1997
Export Citation:
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Assignee:
MITSUBISHI MOTORS CORP
International Classes:
F02D21/08; F02M25/07; (IPC1-7): F02M25/07; F02D21/08; F02M25/07
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)