Dynamic rigidity measuring device and method of double mass flywheel

Abstract

The invention discloses a dynamic rigidity measuring device and method of a double mass flywheel. Related tools including an input motor, a load motor, a torque detector and a rotation angle detectorare arranged, a double mass flywheel and gearbox measuring manner is used, three common motors are used effectively in dynamic rigidity measurement of the double mass flywheel, and dynamic rigidity ofthe double mass flywheel in different practical operation conditions can be measured comprehensively on the premise that the measuring precision is ensured; and dynamic rigidity characteristics of the double mass flywheel under different transmission torques, excitation frequencies and fluctuation amplitudes are obtained to guide matching design of the double mass flywheel with power transmissionsystems as an engine and the gearbox more effectively, and the NVH performance of a vehicle is improved.

Description

Technical field [0001] The invention relates to the field of vehicle shock absorber measurement, in particular to a dual-mass flywheel dynamic stiffness measurement device and measurement method. Background technique [0002] As a new type of torsional vibration damper, dual-mass flywheel is installed between the engine and the gearbox. It not only has the functions of energy storage and vibration reduction for the single-mass flywheel of the transmission, but also can be adjusted by setting different inertia and stiffness. The natural frequency characteristics of the torsional vibration of the drive train, and the use of its own damping structure to reduce the amplitude of the shafting, effectively absorb and attenuate the engine output vibration, and improve the torsional vibration performance of the drive train. It has become the current improvement in the torsional vibration characteristics of the automobile power train. The most effective means. [0003] In the process of hig...

AI Technical Summary

Problems solved by technology

In this method, since one end of the clutch is fixed, the applied torque should not be too large. If the torque is too large, it will easily cause the clutch spring to be directly compressed to the limit; the excitation frequency can only be below 100Hz, and the amplitude is only within the range of the clutch. Apply small angular fluctuations within the torsional angle range

Although the stiffness characteristics of the spring element can be measured to a certain extent, other components of the dual-mass flywheel, such as the inertia force of the slider and the spring, the distribution of lubricating grease, and the frictional contact of the spring cavity, cannot be measured at the actual operating speed. , The influence of the working torque on the spring stiffness value

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