Engine control method and engine control system

Details Engine control method and engine control system Engine control method and engine control system

2006-12-08

2010-06-01

Vo, Hieu T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S568210

Reexamination Certificate

active

07729843

ABSTRACT:
An engine control method and an engine control system that can inhibit the emission of NOx and reduce noise are provided. An engine control method in which an engine2is caused to perform diffusion combustion at normal times and switched from diffusion combustion to premixed combustion when an engine load is low, wherein when the engine2is switched from the diffusion combustion to the premixed combustion, an oxygen concentration in an intake air of the engine2is found and when the found oxygen concentration exceeds a threshold of NOx generation oxygen concentration that has been set in advance, switching from the diffusion combustion to a fuel injection mode of the premixed combustion is stopped, and when the found oxygen concentration then becomes equal to or less than the threshold of NOx generation oxygen concentration, switching is performed to the premixed combustion.

REFERENCES:
patent: 6739295 (2004-05-01), Yamaoka et al.
patent: 7270118 (2007-09-01), Yamaoka et al.
patent: 2002-327638 (2002-11-01), None
patent: 2002-371893 (2002-12-01), None
patent: 2003-286876 (2003-10-01), None
patent: 0214665 (2002-02-01), None
International Search Report for PCT/JP2006/324564 dated Mar. 2, 2007.

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