Study on the Change of Friction Characteristics with Use In the Wet Clutch of Automatic Transmission

Matsuo, Kohei; Saeki, Shin

doi:10.4271/972928

Cited by 17 publications

(6 citation statements)

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“…This observation implies that the proposed features are relevant to monitor the progression of clutch degradation. The increasing dimensionless engagement duration as depicted in the upper panel of Figure 14 implies that the COF drops as the degradation progresses, see Figure 8, which confirms the experimental data available in the literature (Matsuo & Saeki, 1997;Ost et al, 2001;Maeda & Murakami, 2003;Fei et al, 2008). For the same operating conditions (e.g.…”

Section: Experimental Verification Of the Developed Condition Monitoring Methodssupporting

confidence: 83%

“…The coefficient of friction (COF), which can be seen as a physics-based feature, has been used for many years as a principle feature for monitoring the condition of wet friction clutches (Matsuo & Saeki, 1997;Ost, Baets, & Degrieck, 2001;Maeda & Murakami, 2003;Li et al, 2003;Fei, Li, Qi, Fu, & Li, 2008). However, the use of the COF for clutch monitoring is possibly expensive and not easily implementable for real-life applications, due to the fact that at least two sensors are required to extract the COF, namely (i) a torque sensor and (ii) a force sensor, which are commonly difficult to install in a transmission (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Condition Monitoring Method for Automatic Transmission Clutches

Ompusunggu

Papy

Vandenplas

et al. 2020

IJPHM

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This paper presents the development of a condition monitoring method for wet friction clutches which might be useful for automatic transmission applications. The method is developedbased on quantifying the change of the relative rotational velocity signal measured between the input and output shaft of a clutch. Prior to quantifying the change, the raw velocity signal is preprocessed to capture the relative velocity signal of interest. Three dimensionless parameters, namely the normalized engagement duration, the normalized Euclidean distance and the spectral angle mapper distance, that can be easily extracted from the signal of interest are proposed in this paper to quantify the change. In order to experimentally evaluate and verify the potential of the proposed method, clutches’ life data obtained by conducting accelerated life tests on some commercial clutches with different lining friction materials using a fully instrumented SAE#2 test setup, are utilized for this purpose. The aforementioned parameters extracted from the experimental data clearly exhibit progressive changes during the clutch service life and are well correlated with the evolution of the mean coefficient of friction (COF), which can be seen as a reference feature. Hence, the quantities proposed in this paper can therefore be seen as principle features that may enable us to monitor and assess the condition of wet friction clutches.

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Section: Experimental Verification Of the Developed Condition Monitoring Methodssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Condition Monitoring Method for Automatic Transmission Clutches

Ompusunggu

Papy

Vandenplas

et al. 2020

IJPHM

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show abstract

“…see [5,24,25,26,19,7,27]. However, the respective influences of adhesive wear and thermal degradation on the contact characteristics of paper-based friction materials during their lifetime remain unclear and therefore are subject to further investigation.…”

Section: Introductionmentioning

confidence: 98%

Distinguishing the effects of adhesive wear and thermal degradation on the tribological characteristics of paper-based friction materials under dry environment: A theoretical study

Ompusunggu

Sas

Brussel

2015

Tribology International

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“…In automatic transmissions of cars, separator and friction discs are commonly made of low carbon steel material and paper-based friction material respectively because of their good anti-shudder tendency and suitability. Several investigations revealed that, glazing and plugging the pores of friction plates were one of the failure mechanisms by which wet clutch loses anti-shudder characteristics [9][10][11][12] correlation with anti-shudder durability, changes in ATF properties have a greater influence on boundary friction than surface glazing [13].…”

Section: Introductionmentioning

confidence: 99%