Torsional vibration excitation device and test bed of vehicle drive system

Abstract

The invention relates to a torsional vibration excitation device and a test bed of a vehicle drive system, comprising a torsional vibration excitation device, a wheel loading device, an inertia flywheel and a testing system. The torsional vibration excitation device is used for providing a torsional vibration excitation torque for the torsional vibration research of the drive system and providing power for the drive system. The wheel loading device is used for supporting wheels and simulating a carload acting on the wheels, pressing the wheels towards the inertia flywheel through a mechanical loading mode and locking the positions of the wheels. The testing system is used for collecting pull and pressure signals as well as rotate speed signals output by a sensor and analyzing the pull and pressure signals as well as the rotate speed signals. The torsional vibration excitation device comprises a driving motor, a driving gear shaft, an excitation gear shaft and an excitation motor, wherein the driving motor drives the driving gear shaft to rotate through the belt of the driving motor, the excitation motor drives the excitation gear shaft to rotate through the belt of the excitation motor, and the excitation gear shaft is coaxial with the driving gear shaft.

Description

technical field [0001] The invention relates to a vehicle transmission system test device, in particular to a vehicle transmission system torsional vibration excitation device and a test bench. Background technique [0002] The vehicle transmission system is the main moving component of the car, which is used to provide and transmit the driving power of the car, generally including the engine, clutch, transmission, final reducer, differential and drive half shaft, etc. For front and rear drive cars, it also includes Longer drive shaft. The vehicle transmission system is a multi-degree-of-freedom torsional resonance system. Due to the rough and unstable operation of the engine and the fluctuation of the driving load, the periodic torsional excitation frequency will be generated. When the torsional excitation frequency is consistent with the natural frequency of the torsional vibration of the transmission system, it will be Torsional resonance (hereinafter referred to as tors...

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Problems solved by technology

But its disadvantages are: the output characteristics of the simulation are not the sinusoidal excitation that is usually used to analyze the torsional vibration characteristics, and the torsional resonance response test of the entire transmission system cannot be carried out; at the same time, this test bench also has the defects of complex structure and high cost

But its disadvantage is: when the drive shaft rotates at a certain speed, the excitation frequency can only be twice the speed of the drive shaft, and when the drive shaft rotates at a certain speed, the excitation frequency is also limited

[0008] In addition, the above-mentioned virtual engine simulator and vehicle transmission system dynamic simulation test bench both simplify the wheel into a wheel inertia disk, and the equivalent inertia disk of the whole vehicle is directly connected to the wheel inertia disk through a rigid shaft, so the tire characteristics cannot be studied Influence on the torsional vibration characteristics of the transmission system

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