Title:
OIL DETERIORATION DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2013/057768
Kind Code:
A1
Abstract:
[Problem] To provide an oil deterioration determination device for an internal combustion engine with which the deterioration of oil can be determined accurately regardless of the operational state of the vehicle. [Solution] An EFI-ECU (41) estimates the amount of a sludge precursor accumulated in an oil pan (4) on the basis of the temperature and the fuel injection amount for an engine (1). In particular, the EFI-ECU (41) calculates the amount of fuel injected into the combustion chamber (7) of the engine (1) for each fixed detection period that includes an instance of detection, and estimates the amount of sludge precursor accumulated in the oil pan (4) on the basis of the calculated value for the amount of accumulated sludge precursor per unit amount of fuel, which is calculated on the basis of the current temperature of the engine (1), and the calculated value for the amount of fuel injected during the detection period from the previous instance of detection to the current instance of detection, and when this amount of accumulated sludge precursor reaches or exceeds a fixed value, it is determined that the engine oil (O) has deteriorated.
Inventors:
ITO YUSUKE (JP)
Application Number:
PCT/JP2011/005894
Publication Date:
April 25, 2013
Filing Date:
October 20, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
ITO YUSUKE (JP)
ITO YUSUKE (JP)
International Classes:
F01M11/10
Domestic Patent References:
| WO2009004973A1 | 2009-01-08 |
Foreign References:
| JP2008095562A | 2008-04-24 | |||
| JP2010145107A | 2010-07-01 | |||
| JP2010077828A | 2010-04-08 | |||
| JP2004156455A | 2004-06-03 |
Other References:
See also references of EP 2770175A4
Attorney, Agent or Firm:
ARIGA, Gunichiro et al. (JP)
Ariga Army Ichiro (JP)
Ariga Army Ichiro (JP)
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Claims: