Dynamic load study of vehicular powertrain under the engine excitation

The dynamic load often leads to the failure and damage of the key components such as gears and shafts. It can be divided the dynamic torque into the average torque and the additional torque. The calculation method of dynamic additional load is presented under the excitation of engine based on the angular displacement of shafts caused by the torsional vibration in powertrain. The dynamic torque acted on shafts, couplings and gears were derived in and the method was given to justify the knock noise of tooth surface between meshed gears. For a vehicular powertrain, calculation of dynamic torque acted on main parts was completed, and experiments were also carried out to validate the calculation result. The example gave a theoretical analysis for the damping effects of Geislinger elastic coupling. The study aimed to predict the dynamic load characteristic and provide the guide for the dynamic design and structure modification.