Fuel properties estimation for internal combustion engine

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

2005-08-16

2005-08-16

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C073S116070, C701S109000, C123S00100A

Reexamination Certificate

active

06928998

ABSTRACT:
Fuel properties estimating apparatus for an internal combustion engine includes a controller to determine an estimated component concentration of a component such as alcohol in a fuel. The controller calculates a new value of the estimated component concentration in accordance with a component concentration variation and a stored previous value of the estimated component concentration. From an air-fuel ratio correction quantity calculated from an actual air fuel ratio, for correcting a fuel injection quantity, the controller calculates the component concentration variation by using a conversion function determined by the previous value of the component concentration.

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U.S. Appl. No. 10/768,662, filed Feb. 2, 2004, Abe et al.

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