Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2008-02-28
2009-11-10
Huynh, Hai H (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C701S103000, C123S299000, C123S436000, C123S480000
Reexamination Certificate
active
07617039
ABSTRACT:
The present invention relates to a method of operating an internal combustion engine. With reference to FIG.1, fuel is supplied to charge air using an injector (116) which in each operation delivers a set amount of fuel. The amount of fuel supplied to the charge air in each engine cycle is controlled by how many times the injector (116) operates in each cycle. A desired fuel demand is calculated as a number of operations of the injector per cycle, calculated to at least one decimal place. The desired fuel demand is rounded to a near integer to provide an output fuel demand for the injector as a number of operations of the injector for the next operating cycle in varying operating conditions of the engine. In steady state operating conditions of the engine an aggregate number of operations for a plurality of engine cycles is calculated which is closer to an aggregated desired fuel demand for the plurality of cycles than if for each cycle of the plurality of output cycles the output fuel demand is calculated independently.
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Patents Act 1977: Search Report under Section 17, Date of Search: Apr. 27, 2007 Application GB0703880.5.
Patents Act 1977: Further Search Report under Section 17, Date of Search: Nov. 21, 2007 Application GB0703880.5.
Allen Jeffrey
Barraclough Steven
Drake Timothy Guy
Ravenhill Paul Bartholomew
Smither Benjamin David
Huynh Hai H
Luedeka Neely & Graham PC
Scion-Sprays Limited
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