Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2004-11-17
2010-06-22
Kundu, Sujoy K (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C702S033000, C073S001090, C701S084000, C701S090000, C123S406230
Reexamination Certificate
active
07742882
ABSTRACT:
A method for producing a value T being representative of the mean engine torque generated on a crankshaft of an internal combustion engine includes the steps of producing a speed vector including values being representative of instantaneous speeds of the engine during a sampling period, determining a mean engine speed n during said sampling period from the speed vector, determining a value Px, being representative of the frequency contribution of the speed vector at the frequency x*n, where x is a pre-selected order, and producing a value T being representative of the mean engine torque on the crankshaft during said sampling period, wherein T is derived from a mathematical expression including a polynomial having at least a term k*n*Px, where k is a polynomial constant. A device for producing a value T is also disclosed.
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International Search Report for corresponding International Application No. PCT/SE2004/001679.
Ahlinder Sven-Ake Hurtig
Fredriksson Krister
Wattwil Fredrik
Kundu Sujoy K
Park Hyun
Volvo Lastvagnar AB
WRB-IP LLP
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