Hogyan oldja meg a tengelykapcsoló az alapjárati zajproblémákat a gyors sebességváltókban? Magyarország

Automotive engineering as a stream of engineering is in a continuous search for ways of improving the performance of cars or the riding experience of users. There is also a completely separate section of a car, called Noise Vibration Harshness (NVH), which has a major imprint on the perceived car quality. Performance cars with fast gearboxes are notorious for bearing high idle noise that goes against the car’s desired feel. In order to understand how the clutch can mitigate idle noise problems in fast gearboxes this article examines the operating principles of fast gearboxes and clutches, the effect of angle and torque on vibro impulses on auxiliary shafts, and the use of clutch idle dampers.

The working principle of fast gearbox to be specific is used in this part of the research paper.

Says fast gearboxes, these ones are basically used for faster shifting of gears and more power and acceleration which is vital for racing and high end speed driving. The essence of a fast gearbox relies on that it can achieve reduced gear shift time after time, which translates to increased torque control over the car. Usually, fast gearboxes have a sequential shifting system that is different from the H pattern of most conventional manual transmission. This sequential shift system enables the driver shift to second gear or back to the first smooth and quickly to ensure that the power is delivered continuously.

Subassemblies of a fast gearbox include; the input shaft, the output shaft, and the gears. As the engine applies power to the input shaft, numerous gear ratios in the gear train change this power to the output shaft, which in turn the wheels. But when the car is in an idle state, when the engine is running more intensively and the car does not move, vibrations and noise in the gearbox can be clearly felt and heard due to the lack of load.

Angle and Torque that Affect the Vibration of the Auxiliary Shaft of the Fast Gearbox

Auxiliary shaft used in a fast gearbox helps to keep the transmitting shafts in terms of straightness and weight balance. It is sensitive to vibrations and more so when the power plant is idle, hence having minimum load to balance the shaft. It is with this understanding that factors such as angle and torque are known to influence these vibrations.

Angle: Inclination angle of auxiliary shaft can influence stability. In this case it is dangerous if the angle set is to steep or misaligned because this will increase the vibrations. For instance, a variation of 2 degrees to the preferred head angle increases the vibration amplitude by 10% a factor that results into high idle noise.

Torque: The load considered in the auxiliary shaft is as a result of the torque applied to it. At idle, torque low and it would not seem sufficient to counteract the inherent vibrations within the gearbox for the auxiliary shaft. For instance, an auxiliary shaft having torque below 20N.m may vibrate and such vibrations can be audible as idle noise whereas in optimal performance torque eliminates such noise.

The Working Principle of Clutch Idle Damper

A clutch idle damper is specifically developed and intended for handling two problems, which are vibration and noise while idling. The role of the damper is to take and to dampen the torsional vibrations which pass from the engine to the gearbox. It is thus able to attenuate variation and thus minimize the noise arising from the above variation.

They has springs and friction materials as part of the clutch assembly of the geared wheels. When the engine is running at idle and clutch is pinned, the springs accommodate themselves to take Torsional vibrations by expansion and contractions and the friction material also play their part to damp the vibrations by changing the same energy to heat.

How to Solve the Abnormal Noise at Idle Speed through the Clutch?

When dealing with shadow noise concerns in the quick gearboxes with the use of clutch, it is necessary to be an uncompromising engineer regarding angle and torque parameter settings. It is feasible to decreasing the vibrations of the auxiliary shaft by fitting a clutch idle damper, thus decreasing the noise.

Optimal Angle: Angle adjustment of the auxiliary shaft to the angle range of up to 0.5 degree is achieved in order to avoid and reduce the chances of deviations and noises during operation.

Adequate Torque: An idle torque exceeding 25 Nm is recommended as it increases stability of auxiliary shafts against looms. This maximum value also ensures that with the clutch idle damper fitted, all but the smallest torsional disturbances will be so damped that they will not be audible.

In conclusion, solving the problems on the idle noise in high speed gearboxes involves knowing how the angles and the torque together with the damping action of the clutches, belt pulley and the top covering elements all interact with one another. With proper adjustment of these parameters and application of suitable dampers, it will be possible to improve the NVH performances in high powered vehicles providing much better idle NVH characteristics.