发动机转速特性实验
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The speed characteristics of the engine
Guan Yue 102090
School of automotive Studies ,Tongji University
of
● Speed characteristic: engine oil amount regulating mechanism (rack or rod) remain unchanged, torque, power, fuel
consumptionperformance changes with the engine speed. ●
Full load speed characteristic: engine oil quantity
regulating speedcharacteristics of the mechanism at the maximum position measured.
● Partial load characteristics: engine oil quantity
regulating speedcharacteristic mechanism below the maximum position measured.This experimental solar term door open degree is 19%, so the speed characteristic curve is obtained by partial load characteristics.
Formula ：9550
n T P tq e =
，310e e
B
b P =
⨯
● After calculation, experimental results are consistent
with the above formula. But the power consumed in fact drag down exceed the actual mechanical losses in a given working condition of engine.because motored condition and actual situation is different.