A new methodology of calculating the power of an internal combustion engines (ICE) in free acceleration mode, based on the assessment of reactions occurring on its supports is proposed. Experimental studies were carried out on the YAMZ-53445-22 internal combustion engine with a set of installed measuring equipment. The operation of the internal combustion engine was carried out in free acceleration mode from minimum to maximum crankshaft speed on all cylinders and with one disconnected cylinder. At each operation mode of the internal combustion engine, the crank-shift rotation speed, the value of reactions of the supports and the indicator torque were measured, after which the reactive torque and engine reactive power were calculated. As a result, it was found that the maximum value of the indicative power of the internal combustion engine, calculated by the built-in diagnostic system in relation to the cycle fuel supply, was observed at the crankshaft speed from 2 648 to 2 700 min-1 and was 70,3 kW when operating on all cylinders and 80.6 kW when operating with one disconnected cylinder. The highest value of reactive power was achieved when the internal combustion engine was running on all cylinders and was 40 kW at crankshaft speed 2 697 min-1. Disconnection of one of the cylinders led to a decrease in the reactive power of the internal combustion engine to 25 kW at the crankshaft speed of 2 591 min-1. The experimental studies have shown that it is possible to estimate the power performance of the internal combustion engine by the value of reactions of its supports in free acceleration mode. The nominal effective power by the proposed method can be determined only at additional loading of the internal combustion engine, for example, by the forces of resistance.

Kurnosov Anton F., Guskov Yuriy A.

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