The Willans line represents the relationship between fuel energy input and engine output. Extrapolation to a zero line of fuel input provides a useful approximation of the mechanical losses. Linearity of these curves is assumed in the range from low load downward to a hypothetical zero value of the indicated work. A critical analysis revealed that these lines must have a continued curvature and also that the location of the zero point of indicated power does not coincide with zero fuel input. The paper suggests corrections and defines a directional field which may improve the accuracy of the loss analysis.
A Closer Look at the Willans-Line
Sae Technical Papers
1969 International Automotive Engineering Congress and Exposition ; 1969
01.02.1969
Aufsatz (Konferenz)
Englisch
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