1. Almir Blazevic, University of East Sarajevo, Faculty for Mechanical Engineering East Sarajevo,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina
New development of the IC engine is followed by the increase of the specific parameters: specific engine power per volume (kW/dm3), specific engine torque per volume (Nm/dm3), specific engine load per piston crown area (kW/dm2), etc. All of the parameters mentioned above increase dynamic load of the engine’s crank mechanism, particulary the engine’s crankshaft. Common methods reducing dynamic loads of the engine’s crankshaft, mainly as a result of the torsional vibration, are the torsional vibration dampers mounted on. The most widely used the torsional vibration dampers in the vehicles engines are viscoelastic and viscous dampers. Howeverer, there are also its drawbacks such as reliability, increased weight of the crankshaft, etc. In order to obtain the highest possible reliability of the dampers by diminishing peaks of the extreme torsional loads of the crankshaft and, at the same time, reducing the weight, face a new solution in the form of the vibration dampers built in the existing components of the engine crankshaft. So dampers (absorbers) developing today are:
− dampers in the form of the dual mass flywheels and
− dampers built in the counterweights of the engine’s crankshaft.
This paper gives comparative analysis of the damping efficency of the dynamic viscoelastic dampers and absorbers built in the counterweights on the dynamic load of the crankshaft. At the end, the adoption of the dynamic absorber with the optimal characteristics will be shown.
Saobraćajna sredstva i transport