Title:
CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2012/117520
Kind Code:
A1
Abstract:
The control device for an internal combustion engine according to one embodiment of the present invention (this control device) determines whether to set the target air-fuel ratio, which is the target value for the air-fuel ratio of the gas introduced into a catalyst (43), to a "target rich air-fuel ratio that is less than the theoretical air-fuel ratio" or a "target lean air-fuel ratio that is greater than the theoretical air-fuel ratio" on the basis of the output value from a downstream-side air-fuel ratio sensor (67), and determines the fuel injection amount on the basis of that target air-fuel ratio. This control device is equipped with an evaporative fuel purge means that guides evaporative fuel generated in the fuel tank (51) to the engine's intake passage. At the point in time when a purge execution requirement condition is satisfied, which is when a change from a state wherein the purge execution requirement condition is not satisfied to a state wherein the purge execution requirement condition is satisfied has occurred, and when the target air-fuel ratio is set to the target rich air-fuel ratio, this evaporative fuel purge means initiates the aforementioned evaporative fuel purge, and at the point in time when the purge execution requirement condition is satisfied and the target air-fuel ratio is set to the target lean air-fuel ratio, the evaporative fuel purge is not initiated.
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Inventors:
KIMURA KOICHI (JP)
SUZUKI JUNICHI (JP)
OKAZAKI SHUNTARO (JP)
SUZUKI JUNICHI (JP)
OKAZAKI SHUNTARO (JP)
Application Number:
PCT/JP2011/054624
Publication Date:
September 07, 2012
Filing Date:
March 01, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
KIMURA KOICHI (JP)
SUZUKI JUNICHI (JP)
OKAZAKI SHUNTARO (JP)
KIMURA KOICHI (JP)
SUZUKI JUNICHI (JP)
OKAZAKI SHUNTARO (JP)
International Classes:
F02D41/14; F02D41/04; F02D43/00; F02D45/00; F02M25/08; F02M35/10; F02M35/104
Foreign References:
| JP2009162139A | 2009-07-23 | |||
| JP2008038736A | 2008-02-21 | |||
| JP2004156626A | 2004-06-03 | |||
| JPH08121266A | 1996-05-14 | |||
| JP2000027716A | 2000-01-25 | |||
| JP2000073884A | 2000-03-07 | |||
| JP2006125304A | 2006-05-18 | |||
| JP2000065782A | 2000-03-03 | |||
| JP2004069547A | 2004-03-04 |
Other References:
See also references of EP 2682589A4
Attorney, Agent or Firm:
PROSPEC PATENT FIRM (JP)
Patent business corporation Pros Peck patent firm (JP)
Patent business corporation Pros Peck patent firm (JP)
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Claims: