The Tribological Characteristics of Cu-Based Friction Pairs in a Wet Multidisk Clutch Under Nonuniform Contact

Zhao, Er-Hui; Ma, Bin; Li, Heyan

doi:10.1115/1.4036720

Cited by 29 publications

(14 citation statements)

References 30 publications

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“…Temperatures and stresses in the friction discs of a wet multidisc clutch. Lingesten et al [6], the purpose of the present study is to suggest a model for the analysis of the wear characteristics of paper-based friction content in a wet clutch subjected to both thermal and mechanical degradation. The analytical technique for predictions of wear proposed to investigate experimentally observed two-stage wear activity.…”

Section: Natsumeda and Miyoshimentioning

confidence: 98%

Investigation of Flexible Clutches Over a Wide Range

Morchapure¹,

Zakiuddin²,

Sawarkar³

2020

IJIES

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Section: Natsumeda and Miyoshimentioning

confidence: 98%

Investigation of Flexible Clutches Over a Wide Range

Morchapure¹,

Zakiuddin²,

Sawarkar³

2020

IJIES

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“…32 Fluctuation in the friction coefficient may contribute to this phenomenon, which can result in clutch juddering during torque transmission. [33][34][35] One way to improve low-speed performance of the transmission system and torque fluctuation as exhibited in this case can be achieved when the friction coefficient is small. 23 However, the friction values exhibited at 25 C and 1 r/min were above 0.35, which is significantly high (Figures 3 and 7 respectively), hence the expected fluctuation in torque.…”

Section: Torque-frictionmentioning

confidence: 99%

The performance of Cu-based friction material in dry clutch engagement

Koranteng

Shaahu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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An enhanced Cu-based friction material was prepared by the powder metallurgy techniques and proposed for use in the dry clutch system. The friction characteristics and wear rate of this friction material sliding against 65Mn steel are obtained using Universal Material Tester-5. The friction pairs were subjected to two operating variables, which are sliding speed and temperature. The effect of these variables during the engagement process of the friction pairs is investigated. Knowing the normal applied force and dimension of the clutch disc, the dynamic friction coefficient was translated to friction torque capacity with time. It was found that instability can be excited at low operational conditions when the resulting friction coefficient is high. At 25 ℃, the dynamic friction torque oscillates with time likewise at 400 ℃. Generally, a more stable friction torque is obtained when the sliding speed is varied compared to varying the temperatures. Moreover, the influence of the operating temperatures and sliding speeds on thermal buckling and thermoelastic instability of the friction disc is the second consideration in this work. The onset of thermoelastic instability occurs when the sliding speed exceeded 200 r/min and the results for the growth rate of hot spots were found to agree well with the critical speed of the system. Also, thermal buckling was highly dependent on the temperature difference between the inner and outer radius of the friction disc.

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“…As the friction material of the clutch is the copper-based powder metallurgy material, the interface COF can be expressed as [18]:…”

Section: Friction Torquementioning

confidence: 99%

Numerical and Experimental Studies of the Attenuation Characteristics of Friction Torque in a Wet Multidisc Clutch

et al. 2021

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A numerical model is proposed to calculate both the contact pressure and the friction torque (FT) of the friction components considering the spline friction in a wet multidisc clutch, which is verified by the bench test. The results indicate that the spline friction of components is an important factor causing the axial attenuation of contact pressure on friction pairs. As the applied pressure increases, the attenuation amplitude of contact pressure increases gradually. In addition, the average single-pair FT decreases with the increasing number of friction pairs, thus leading to the decrease of the growth rate of total FT. Therefore, when the number of friction pairs reaches a certain number, it is not reliable to obtain a good torque enhancement, indicating that the effect of spline friction needs to be weakened to reduce the attenuation of contact pressure.

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The Tribological Characteristics of Cu-Based Friction Pairs in a Wet Multidisk Clutch Under Nonuniform Contact

Cited by 29 publications

References 30 publications

Investigation of Flexible Clutches Over a Wide Range

Investigation of Flexible Clutches Over a Wide Range

The performance of Cu-based friction material in dry clutch engagement

Numerical and Experimental Studies of the Attenuation Characteristics of Friction Torque in a Wet Multidisc Clutch

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