Dynamic Model of a single cylinder IC Engine Mechanism

Figure 3.7 Dynamic Model of slider-crank Mechanism

Based on our discussion thus far, we can arrive at a simplified model of the crank-slider mechanism for the purpose of our dynamic analysis as shown in Fig. 3.7. Thus we have either purely rotating masses or purely translating masses and these are given by:

                        (3.13)

where the first term in the rotating masses is due to the effective crank mass at pin A and the second term is due to the part of equivalent connecting rod mass located at pin A. Similarly the first term in reciprocating masses is due to the mass of the piston and the second is due to the part of equivalent connecting rod mass located at pin B. There are inertia forces due to .