ZENEO abnormal noise of the clutch fault analysis
A south Korean hyundai Sonata sedan, driving chassis in sound.
Driver: accelerate or keep the throttle motionless when everything is normal, but the slide on the throttle back or engine during braking, and issued a "luo, luo" sound. ZENEO
Use lifting from the machine body, four-wheel simulation experiment was carried out from the ground, feeling sound from a variable speed drive axle differential parts, from the similar ZENEO noise from the bearing wear. Carried off the transmission and decompose, differential assembly, check the bearing and the seat not found scratches and spots. With his hand upon the planet gear shaft, can feel the radial movement of 0.10 mm, and nearly two and a half shaft gear axial travelmotion of 1.0 mm. But through its between planetary gear meshing, fit clearance is excellent. Through comprehensive analysis, think good differential assembly. Turn the release bearing by hand, there is friction "rustling" sound, decided to change. Then check the clutch disc, clutch pressure plate, two and a half shaft inside and outside of the ball cage, were not found abnormal phenomenon.
If just ZENEO separation bearing wear,
so the noise made by it should appear on the stage on the clutch pedal, can't be on the road when the throttle back to produce, it shows that did not find the real point of failure. At this time if it is refitted transmission, and the result must be repaired, and review it again carefully. Factors may be intuitive, I picked up a clutch plate inspection, according to rivet the wear depth, can continue to use, but careful observation, found the driven plate of sheet steel and driven PanGu article with a small fight between bright printing, holding friction lining in hand, another hand rotating platen hub, discovery has serious kuang.
Driven plate of steel plate and driven disc hub by damping spring elasticity to join together, disc hub between and vibration of the steel plate, friction plate and the clip. And vibration of the steel plate with a rivet, set aside a certain distance among them, to rotate the disc hub can make relatively slight. When the clutch plate is not affected by the torque. When the torque by friction lining first introduced and vibration of the steel plate, then through spring passed to plate the hub, the spring is compressed, in order to absorb the impact of, and use and vibration of the steel plate, plate between the hub and friction between the friction torque vibration energy consumption, fast vibration attenuation.
Because the engine to the car drive
train of torque is periodically changing, which makes the transmission torque vibration, if the frequency and transmission system natural frequency of vibration, which result in resonance. Damping spring not only slow and impact load, also can reduce the natural frequency of vibration, to avoid the resonance. And default of damping spring due to the frequent operation of clutch and the high temperature annealing and shorten, lost the elastic connection and the effect of vibration reduction. Receiving glide, the torque by the wheels by the transmission to the engine, the engine brake, clutch plate because of the force between steel sheet and plate of the hub to, relative to reverse a point of view, there are hit the phenomenon, and because of the cyclical changes in torque can produce similar bearing wear "luo, luo" sound.