Title:
SUPERCHARGING PRESSURE CONTROL METHOD AND SUPERCHARGING PRESSURE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2022/024203
Kind Code:
A1
Abstract:
In the present invention, when acceleration is required, a target pressure ratio (tPR) to be reached is set on the basis of a target torque. For the duration that the real pressure ratio (rPR) deviates from the target pressure ratio (tPR), feedback control causes a target wastegate stroke (tWGS) to approach full closure, and thereby the responsiveness of a supercharging pressure is increased. If the intake air quantity (Qa) and the engine rotation speed (NE) exceed criteria for restriction conditions before the target pressure ratio is reached, the target wastegate stroke (tWGS) is restricted such that the degree of opening increases. Consequently, the turbine rotation speed (NT) does not exceed a permitted rotation speed. If the real pressure ratio (rPR) comes close to the target pressure ratio (tPR), the degree of opening is controlled in accordance with the static target wastegate stroke (tWGS) corresponding to the target pressure ratio (tPR).
Inventors:
KOJIMA AKIRA (JP)
KUBOTA MITSUHIKO (JP)
IMAI DAISUKE (JP)
MORIKAWA MASASHI (JP)
KUBOTA MITSUHIKO (JP)
IMAI DAISUKE (JP)
MORIKAWA MASASHI (JP)
Application Number:
PCT/JP2020/028792
Publication Date:
February 03, 2022
Filing Date:
July 28, 2020
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F02D23/00; F02B37/18
Domestic Patent References:
| WO2016194141A1 | 2016-12-08 |
Foreign References:
| JP2015108329A | 2015-06-11 | |||
| JP2005146906A | 2005-06-09 | |||
| JP2018119473A | 2018-08-02 | |||
| JPH05106455A | 1993-04-27 | |||
| JP2017198081A | 2017-11-02 | |||
| JP2018076833A | 2018-05-17 |
Other References:
See also references of EP 4191045A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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