Title:
INTERNAL COMBUSTION ENGINE CONTROL SYSTEM AND CONTROL DEVICE FOR SAME
Document Type and Number:
WIPO Patent Application WO/2020/008941
Kind Code:
A1
Abstract:
According to the present invention, as the load of an internal combustion engine drops, intake closing timing (IVC) for an intake valve is controlled to a retard side by an intake-side variable valve mechanism, and ignition timing (IgT) is controlled to an advance side by an ignition timing control means, the ignition timing (IgT) being further to the retard side than the intake closing timing (IVC), and the angle difference between the intake closing timing (IVC) and the ignition timing (IgT) being kept at or above a prescribed correction angle (Δθcmp). The intake closing timing (IVC) of the intake valve is significantly retarded by the intake-side variable valve mechanism so as to improve Atkinson-cycle-based fuel consumption reduction effects, and the ignition timing (IgT) is advanced so as to suppress reduction of engine torque, but the ignition timing (IgT) is not advanced past the intake closing timing (IVC), which makes it possible to suppress backfiring. The present invention can thereby suppress backfiring and achieve Atkinson-cycle-based fuel consumption reduction.
Inventors:
NAKAMURA MAKOTO (JP)
Application Number:
PCT/JP2019/025053
Publication Date:
January 09, 2020
Filing Date:
June 25, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D15/00; F02D13/02; F02D41/22; F02P5/15
Foreign References:
| JP2005201209A | 2005-07-28 | |||
| JP2008274780A | 2008-11-13 | |||
| JPH06173751A | 1994-06-21 | |||
| JP2017125435A | 2017-07-20 | |||
| JP2012225199A | 2012-11-15 | |||
| JP2016070069A | 2016-05-09 | |||
| JP2016125459A | 2016-07-11 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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