Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-09-11
2007-09-11
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
C701S115000
Reexamination Certificate
active
11590850
ABSTRACT:
The invention minimizes the man-hours required to develop a map that estimates the torque of an internal combustion engine. The method according to the invention includes making a torque estimation model that defines the relation between indicated torque and characteristic values that represent the flow of gas and the combustion state in an internal combustion engine; determining the value of a parameter that relates to a heat-generation rate (dQ/dθ), which is the rate of change in a heating value Q in a cylinder with respect to the crank angle θ, based on an operating condition of the engine; calculating the heat-generation rate under the desired operating condition; estimating the indicated torque of the internal combustion engine with the torque estimation model, using the heat-generation rate. The method according to the invention results in more accurate control over the operating state of an internal combustion engine.
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M. Katsumata and Y. Kuroda, “Development of Engine Torque Simulation—Examination of Heat Releses Rate Estimation By Wiebe Function,” 2006 SAE International, Sep. 27, 2006.
Kenyon & Kenyon LLP
Toyota Jidosha & Kabushiki Kaisha
Vo Hieu T.
LandOfFree
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