Patent ID: 6401527
Filing Date: 2002-06-11
Classification: F02D,G01M

Abstract:
A method for determining the actual torque (M_act) developed by an internal combustion engine by evaluating the trace of the rpm (n) of the crankshaft of the engine, the method comprising the steps:determining the mean rpm (n_)from a trace of the rpm (n) in a work stroke of a piston of said engine; determining a first area (F1) between the trace of said rpm (n) in the first half of said work stroke and said mean rpm (n_); determining a second area (F2) between the trace of the rpm (n) in the second half of said work stroke and said mean rpm (n_); determining an index (A) for said actual torque (M_act) from one of: the difference of said first area (F1) and said second area (F2) and or from the ratio of said first area (F1) to said second area (F2); and, determining said actual torque (M_act) developed by said engine from said index (A) for said actual torque (M_act).