Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor
Reexamination Certificate
2007-01-09
2007-01-09
Douglas, Steven O. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
With signal, indicator, recorder, inspection means or exhibitor
C141S198000, C141S192000, C123S516000
Reexamination Certificate
active
11232704
ABSTRACT:
A method of estimating composition of fuel in the fuel tank of a vehicle. A refuel event is detected. Fuel consumption is monitored during a plurality of stages after the refuel event. A plurality of fuel trim shift values are determined relative to the stages. The fuel trim shift values are used to estimate a fuel composition change. This method eliminates a need for a hardware fuel composition sensor and also provides dynamic filtering of fuel trim values.
REFERENCES:
patent: 6289947 (2001-09-01), Heimbrodt et al.
patent: 6877488 (2005-04-01), Washeleski et al.
patent: 7055505 (2006-06-01), Washeleski et al.
Carr Mark D.
Dulzo Joseph R.
Graham Christopher R.
Jess Richard B.
MacEwen Ian J.
DeVries Christopher
Douglas Steven O.
General Motors Corporation
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