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1 Journal of KONES

1 2006

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The relationship between the fluctuation of the indicated work, the fluctuation of the crankshaft speed and the electric current from a generating set

Cupiał K., Gruca M., Grzelka J.

Journal of KONES

2006

Vol. 13, No. 2

51-58

The paper presents the results of introductory investigation of the relationship between the value of indicated work and variations of momentary crankshaft rotational speed and electric current from generating set. A clear correlation between engine indicated work and electric energy calculated in time interval angularly shifted regarding indicated work calculation range was stated. The indicated work of consecutive cycles also well correlates with amplitude of electric current. The correlation between crankshaft angular acceleration in determined cycle phase point and indicated work was also stated but it is less significant than it is in the previous cases. In particular Cylinder pressure courses and envelope of electric current, correlation between indicated work and transient electric current, electric energy, crankshaft mean angular acceleration, cylinder pressure, rotational speed and crankshaft angular acceleration courses, estimated values of relative indicated work on the basis of electric current value, electric power value and crankshaft angular acceleration value are demonstrated in the paper.