Title:
CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2017061872
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a control device that can avoid rich misfire of gas fuel in an internal combustion engine capable of switching fuel used for driving between liquid fuel including alcohol and the gas fuel.SOLUTION: In an engine that uses liquid fuel during a warming-up operation at cold start and enables fuel to be used to be switched from the liquid fuel to gas fuel after completion of the warming-up, after the warming-up operation is completed (No determination in Step ST2), when an oil dilution rate is a predetermined value or more (Yes determination in Step ST3), until the oil dilution rate reaches less than the predetermined value (until No determination is made in ST3), switching from a state where the liquid fuel is used to a state where the gas fuel is used is prohibited (Step ST4). Thus, since the gas fuel is not used in a situation where an air-fuel ratio in a cylinder is lowered due to introduction of the fuel evaporated in an oil pan to an intake system, rich misfire of the gas fuel can be avoided.SELECTED DRAWING: Figure 3
Inventors:
MURATA SEIYA
Application Number:
JP2015186853A
Publication Date:
March 30, 2017
Filing Date:
September 24, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D19/06
Domestic Patent References:
| JP2011185173A | 2011-09-22 | |||
| JP2008202472A | 2008-09-04 | |||
| JP2014167271A | 2014-09-11 | |||
| JP2001271669A | 2001-10-05 | |||
| JP2008202554A | 2008-09-04 |
Foreign References:
| WO2011158353A1 | 2011-12-22 | |||
| WO2013065149A1 | 2013-05-10 |
Attorney, Agent or Firm:
Patent Business Corporation Ark Patent Office
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