Surface chemical characterization of steel clutch plate in ATF

Li, Shaohui; Di, Zechao; Cheng, Liang; Liu, Zhongguo; Piao, Jicheng; Huang, Danqiong; Zhao, Zhiyu; Cui, Haitao; Li, Yang

doi:10.1016/j.triboint.2016.05.044

Cited by 10 publications

(4 citation statements)

References 24 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The durability of the antishudder property is an important criterion to evaluate the overall performance of an ATF formulation [20]. Table 2 is the judgment of antishudder property (JASO M349: 2001-5.1).…”

Section: Friction Resultsmentioning

confidence: 99%

“…The friction coefficient at various speeds, loads, and temperatures were recorded. The test procedure was carried out according to JASO M349 for LVFA [19,20,25]. The tribological testing for each condition was done in triplicate.…”

Section: Tribological Testingmentioning

confidence: 99%

“…Antishudder performance of wet clutches can be modulated by FMs and other additives in ATFs [16−18]. Our previous study found that a CaP tribofilm formed by FM and detergent affected friction characteristics [19,20]. Zhao et al [8,21] investigated the chemical composition of tribofilms containing P and Ca on the steel friction plate of the clutch.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of calcium phosphate (CaP) tribofilms from commercial automatic transmission fluids (ATFs) and their correlation with antishudder performance

Di¹,

Xu²,

Liu³

et al. 2019

Friction

Self Cite

View full text Add to dashboard Cite

The friction properties of wet clutches are highly dependent on the surface tribofilms formed by automatic transmission fluids (ATFs). Here, four commercial ATFs were evaluated with a disc-on-disc tribometer to study tribofilm formation on steel surfaces and the effects of tribofilms on the friction properties. The chemical composition, stoichiometry, structure, and thickness of the tribofilms were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), secondary ion mass spectrometry (SIMS), and X-ray photoelectron spectroscopy (XPS). Calcium phosphate (CaP) tribofilms form on the friction surface with all ATFs, which contributes to their antishudder characteristics. The thickness and surface coverage of CaP tribofilms are positively correlated with their antishudder properties.

show abstract

Section: Friction Resultsmentioning

confidence: 99%

Section: Tribological Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of calcium phosphate (CaP) tribofilms from commercial automatic transmission fluids (ATFs) and their correlation with antishudder performance

Di¹,

Xu²,

Liu³

et al. 2019

Friction

Self Cite

View full text Add to dashboard Cite

show abstract

“…Based on the fractal theory modeling of real morphology, Chen et al [14] proposed a dynamic torque theory model for the wet clutch engagement process. Second, in terms of lubricant quality, Li et al [15] investigated the mechanism of the effect of lubricant on the friction characteristics of wet clutches and found that the lubricant mainly affected the friction coefficient through the formation of calcium carbonate on the friction surface. In addition, Wirkner et al [16] and Fatima et al [17] studied the influence of water content and iron filing content in the lubricant on the friction coefficient of wet clutches.…”

Section: Introductionmentioning

confidence: 99%

Friction Coefficient of Wet Clutches as a Function of Service Mileage

2024

Lubricants

View full text Add to dashboard Cite

As a core component for efficient variable speed transmission and energy saving, wet clutches are widely used in the transmission systems of energy-saving and new energy vehicles. However, with an increase in the service mileage of the wet clutch, the friction coefficient undergoes alterations. This leads to a deterioration of the control accuracy of the clutch transmission torque, which ultimately has a negative impact on the dynamic characteristics and driving safety of the entire vehicle. In order to understand the service behavior of the friction coefficient in a wet clutch, wet clutches with different service mileages were investigated experimentally and theoretically. The results show that as the service mileage increased, the hydrodynamic lubrication phase was extended. Analyses of the three-dimensional profile of the friction plate and the theoretical simulation of the friction revealed that the edge ridges of the friction pads were flattened. This increased the clutch engagement force when the asperities on the separator and friction plates came into contact.

show abstract