Rattling and clattering noise in automotive transmissions—Simulation of drag torque and noise

Doan, S.N.; Ryborz, Joachim; Bertsche, Bernd

doi:10.1016/s0167-8922(03)80039-1

Cited by 15 publications

(14 citation statements)

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“…With the aid of tangentially acting An additional tooth on the bracing toothed disc causes the bracing toothed disc to turn more slowly compared with the idler gear, resulting in friction that acts in the same direction as the drag torque. In the auxiliary transmission, the fixed gear has a auxiliary transmission subject to friction Table 4 Noise-reducing effect of parameters and internal measures at the passenger car transmissions [10] Measures to reduce rattle and caltter noises (five-speed manual transmission)…”

Section: Internal Measuresmentioning

confidence: 99%

Design of Low-Noise Manual Automotive Transmissions

Doğan

Ryborz

Bertsche

2006

Proceedings of the Institution of Mechanical Engineers, Part K:

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To find an answer to the question 'how to design low-noise manual automotive transmissions', it is essential to look at numerous external and internal measures which have already been developed to reduce rattle and clatter proneness. Only very few have been used in mass production. The use of these measures depends not only on the degree of noise reduction achieved but also on the production engineering and economic parameters. The wear characteristics and the level of power loss and the intrinsic noise involved must also be taken into account. Each transmission system and each driveline system must be individually adapted from the large number of various possible solutions. This study focuses on of existing and new measures in the literature and some experimental results which were investigated at the University of Stuttgart Institute of Machine Components. The aim was to create an engineering design catalogue for low-rattle and -clatter manual automotive transmissions using the systematic measurements and the knowledge derived from experience.

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Section: Internal Measuresmentioning

confidence: 99%

Design of Low-Noise Manual Automotive Transmissions

Doğan

Ryborz

Bertsche

2006

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…The main noise in the transmission is known as gear-rattling noise and gear-clattering noise. The noise is called as gear-rattling when the transmission is in neutral, and as gear-clattering when the gear is engaged under power [8][9][10][11]. Gear rattle may occur in the teeth of the unloaded or light-loaded gear pairs because of the presence of backlash [8,9,12,13].…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics of spur gear system with non-linear damping under no lubrication condition

Liu¹,

Liu²

2019

J. vibroeng.

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Gear rattle induced by backlash between meshing gears results in excessive vibration and noise in many gear systems. A dynamic model of a light-loaded spur gear pair with non-linear damping under no lubrication condition is presented in this paper. Unlike previous models, the effect of backlash on damping is considered, so the damping is not linear. In order to illustrate the effect of non-linear damping on the dynamic response, the dynamic behaviors of gear system with non-linear damping (GSND) and linear damping (GSLD) under different impact status are compared by using the numerical integration method. The results show that the behavior of gear pair with non-linear damping is different from that with linear damping, and the impact vibration of GSND is much greater than GSLD under some conditions. The influences of parameters such as load ratio, load value, meshing stiffness, and damping ratio on the dynamic responses of GSND are also discussed, and some suggestions to reduce impact vibration of gear system are proposed. The results provide a theoretical basis for the design and manufacture of gear system.

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“…In design literature, such as Lechner & Naunheimer (1999), it is proposed that constant drag torques can be applied to equations for designing various synchroniser parameters, however speed and load dependent models can be deployed, such as Dogan (2004). The incorrect estimation of both the numerical quantity of this drag and how it is applied to the synchroniser can lead to failure through clash, block out or other modes (Socin & Walters 1968).…”

Section: Introductionmentioning

confidence: 99%