Title:
CONTROL DEVICE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/125849
Kind Code:
A1
Abstract:
A control device and a control method for an internal combustion engine that reduce a target compression ratio for a variable compression ratio mechanism (2) to a minimum compression ratio and purge in that state, if an evaporated fuel component has accumulated to a certain level inside a canister (42) for an evaporated fuel processing device (40). Thermal efficiency is reduced by lowering the compression ratio, and the intake air volume and fuel volume required to obtain a desired torque are increased. As a result, the impact on an air-fuel ratio feedback correction coefficient relatively reduces, therefore the purgeable volume is increased. For example, the opening of the purge control valve is set to the maximum when the air-fuel ratio feedback correction coefficient is greater than the minimum and the fuel injection pulse width is greater than the minimum. The present invention facilitates a maximum purge volume without causing, e.g., destabilization of air-fuel ratio control.
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Inventors:
MANO TADAKI (JP)
Application Number:
PCT/JP2014/050286
Publication Date:
August 21, 2014
Filing Date:
January 10, 2014
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F02D15/02; F02D23/00; F02D45/00; F02M25/08
Foreign References:
| JPH11280532A | 1999-10-12 | |||
| JP2002276479A | 2002-09-25 | |||
| JP2006348901A | 2006-12-28 | |||
| JPH04358753A | 1992-12-11 | |||
| JP2004116434A | 2004-04-15 |
Other References:
See also references of EP 2957749A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
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