Title:
CONTROL DEVICE FOR COMPRESSION RATIO VARIABLE INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2015/198462
Kind Code:
A1
Abstract:
A control device for a compression ratio variable internal combustion engine is provided with a compression ratio variable mechanism capable of changing an engine compression ratio in accordance with a rotation position of a control shaft and a compression ratio detection unit that detects an actual compression ratio. In a predetermined engine operation state (S11), for example, immediately after an engine start, a reference position learning operation for the compression ratio detection unit is carried out with the control shaft mechanically locked on a predetermined reference position (S12). During an engine operation, if the actual compression ratio is lost due to a communication error or the like (S13), or if a difference between the actual compression ratio and a target compression ratio is larger than expected due to some abnormalities (S14), the reference position learning operation is immediately carried out (S15), thereby causing a quick return to the state in which normal compression ratio control can be performed.
Inventors:
HIYOSHI RYOSUKE (JP)
OHTSU SHO (JP)
OHTSU SHO (JP)
Application Number:
PCT/JP2014/067110
Publication Date:
December 30, 2015
Filing Date:
June 27, 2014
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F02D15/02; F02B75/32; F02D13/02; F02D41/04; F02D43/00; F02P5/15
Foreign References:
JP2006226133A | 2006-08-31 | |||
JPH0772515B2 | 1995-08-02 | |||
JP2012225331A | 2012-11-15 |
Other References:
See also references of EP 3163055A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
Download PDF: