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I want to ask how it is possible to generate of a realistic form the curve of backtorque of an engine. In many cases, it is very little information available for realizing the above mentioned curve, frequently, only the compression ratio.
It seems that the backtorque curve should be inversely proportional to the torque curve, although in the start of the engine and other situations, the friction will be very different, and will not be like that. To construct it based on this information will turn out to be slightly realistic.
Any orientation will be very well received. Greetings and thank you in advance.