Fuel properties estimation for internal combustion engine

Details Fuel properties estimation for internal combustion engine Fuel properties estimation for internal combustion engine

2005-12-13

2005-12-13

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S114000, C123S672000

Reexamination Certificate

active

06975933

ABSTRACT:
Fuel properties estimating apparatus for an internal combustion engine includes a controller to determine an estimated component concentration of a component in a fuel. The controller calculates an air-fuel correction quantity in accordance with an actual air fuel ratio of the engine; and calculates an air-fuel ratio sensitivity correction quantity from the air-fuel ratio correction quantity and a fuel properties correction quantity calculated from a most recent value of the component concentration. The controller then determines a new value of the estimated component concentration in accordance with the air-fuel ratio sensitivity correction quantity.

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patent: 6363313 (2002-03-01), Katoh et al.
patent: 6615803 (2003-09-01), Kojima et al.
patent: 2003/0070666 (2003-04-01), Hosoi
patent: 2004/0182378 (2004-09-01), Oshimi et al.
patent: 2004/0237951 (2004-12-01), Abe
patent: 5-163992 (1993-06-01), None

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