Title:
EGR ESTIMATION METHOD FOR INTERNAL COMBUSTION ENGINE, AND EGR ESTIMATION DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2021/199411
Kind Code:
A1
Abstract:
This EGR estimation method for an internal combustion engine 1 estimates the EGR rate in intake/exhaust gas systems 10, 20 of the internal combustion engine 1, including an intake gas system 10 and an exhaust gas system 20, the intake/exhaust gas systems 10, 20 of the internal combustion engine 1 being provided with an EGR device 40 including an EGR passage 41 and an EGR valve 43. The EGR estimation method for the internal combustion engine 1 includes, when fuel cut of the internal combustion engine 1 is started when the EGR valve 43 is fully closed, performing determination of a gas substitution state between exhaust gas inside the upstream-side EGR passage 41a and new gas, and estimating the EGR rate on the basis of the result of the determination.
Inventors:
ANDO TAICHI (JP)
SUZUKI KENJI (JP)
SUZUKI KENJI (JP)
Application Number:
PCT/JP2020/015230
Publication Date:
October 07, 2021
Filing Date:
April 02, 2020
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F02M26/47; F02D21/08; F02D43/00; F02M26/06
Domestic Patent References:
| WO2014020982A1 | 2014-02-06 |
Foreign References:
| JPH04284147A | 1992-10-08 | |||
| JP2010096001A | 2010-04-30 | |||
| JP2015057542A | 2015-03-26 | |||
| JP2016211456A | 2016-12-15 |
Other References:
See also references of EP 4130457A4
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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