Title:
CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2017008735
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce a difference between a target air-fuel ratio and an actual air-fuel ratio while increasing the purge amount of fuel vapor during switching from stoichiometric combustion to lean combustion.SOLUTION: A control device for an internal combustion engine includes a purge passage connecting an intake passage and a fuel tank 26, a purge control valve 28 arranged in the purge passage, a fuel injection valve 6, a throttle valve 17, a purge flow constant control part 40b for controlling the opening of the purge control valve 28 so that a purge flow amount as the flow amount of purge gas to be purged via the purge control valve 28 into the intake passage is kept constant, and a fuel injection control part 40c for controlling the amount of fuel to be injected from the fuel injection valve 6. During a period from a first time point when starting throttle opening control to switch from an air amount required for stoichiometric combustion to an air amount required for lean combustion to a second time point when the target air-fuel ratio changes from stoichiometric one to lean one, fuel injection control is performed in the state that the purge flow amount at the first time point is maintained.SELECTED DRAWING: Figure 4
Inventors:
OTSUKA IKU
Application Number:
JP2015121718A
Publication Date:
January 12, 2017
Filing Date:
June 17, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D41/14; F02D41/02; F02D45/00; F02M25/08
Domestic Patent References:
| JPH11287143A | 1999-10-19 | |||
| JPH1193782A | 1999-04-06 | |||
| JPH1162730A | 1999-03-05 | |||
| JPH07189828A | 1995-07-28 | |||
| JPH11343932A | 1999-12-14 | |||
| JPH07166981A | 1995-06-27 | |||
| JPH0763078A | 1995-03-07 |
Attorney, Agent or Firm:
Hideki Takahashi
Mamoru Takada
Hidekazu Onishi
Mamoru Takada
Hidekazu Onishi