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Title:
INTERNAL COMBUSTION ENGINE AND EXHAUST PRESSURE REDUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2015/029899
Kind Code:
A1
Abstract:
Provided is an internal combustion engine (1) provided with a turbo-supercharging system, and with a low-pressure EGR passage (14) connecting an exhaust passage (13) situated at the downstream side of a turbine (15a) of the turbo-supercharging system and an air intake passage (12) situated at the upstream side of a compressor (15b) of the turbo-supercharging system, wherein the exhaust passage (13) is equipped with an exhaust pump (20) situated downstream from the turbine (15a) and upstream from the branching point of the low-pressure EGR passage (14), and the exhaust passage (14) is equipped with an exhaust pressure adjustment valve (21) situated downstream from the point of convergence of the low-pressure EGR passage (14) to the air intake passage (12). In so doing, in the internal combustion engine (1) provided with the turbo-supercharging system and the low-pressure EGR system, rise in pressure of exhaust gases at the outlet of the internal combustion engine (1) is minimized, thereby preventing increased pumping loss, and improving the fuel economy of the internal combustion engine (1).

Inventors:
HARA,Takashi (C/O Isuzu Advanced Engineering Center LTD, 8, Tsuchidana, Fujisawa-sh, Kanagawa 81, 〒2520881, JP)
Application Number:
JP2014/072001
Publication Date:
March 05, 2015
Filing Date:
August 22, 2014
Export Citation:
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Assignee:
ISUZU MOTORS LIMITED (26-1, Minami-Oi 6-chome Shinagawa-k, Tokyo 22, 〒1408722, JP)
International Classes:
F02B37/00; F01N5/02; F02B37/10; F02D9/04; F02D21/08; F02D23/00; F02M25/07
Foreign References:
JP2010236381A2010-10-21
JP2005147052A2005-06-09
JP2009097378A2009-05-07
JP2008284971A2008-11-27
JP2008294129A2008-12-04
JP2005147049A2005-06-09
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (37 Kowa Building, 4-5 Tsukiji 1-chome, Chuo-k, Tokyo 45, 〒1040045, JP)
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