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Comparison of distribution of components of mechanical
losses on nodes and units of gasoline and diesel engines (Figure 1)
shows that they differ insignificantly, and at a diesel engine loss in
the cylindrical piston group and the crank-rod mechanism are
slightly higher, and pump losses and losses of the gas distribution
mechanism are slightly lower. This is due to the fact that the diesel
engine has a much higher degree of compression.
The power of mechanical losses of an internal combustion
engine depends on the speed of its shaft. It is determined on the
stand, both on the running motor and in the forced no-load mode
[3][4]. Various methods are used for this purpose:
1. pressure indication in ICE cylinders;
2. by sequential disconnection of cylinders;
3. extrapolation of loading characteristic;
4. run-out methods;
5. forced scrolling of the combustion engine crankshaft.
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