Tribological study of diesel piston skirt coatings in CJ-4 and PC-11 engine oils

Shaw, Austin; Qu, Jun; Wang, Chinpei; England, Roger

doi:10.1016/j.wear.2017.01.082

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…Roughly 10-15% of total energy generated in an internal combustion engine is lost to parasitic friction [52]. In the piston-cylinder assembly, while the piston rings may account for more than 70% of the total friction-induced energy losses [51], the piston skirt contribution to the friction of the system could also be substantial [54][55][56] and should not be overlooked. Other researchers have stressed that the friction between the piston skirts and cylinder walls could even be comparable in magnitude to the friction between the rings and the cylinder walls in certain circumstances [57,58].…”

Section: Lubrication Evaluation [51]mentioning

confidence: 99%

“…The polymer-graphite coating increased the wear of the steel substrate by 3-7 times, while the Mn-P coating was even worse making the steel substrate worn 4-9 times faster! It was hypothesized that the wear particles from the broken Mn-P coating were basically hard Mn-Fe orthophosphate grains and acted as abrasive at the contact interface to induce third-body abrasion to accelerate the wear of the piston steel substrate [51]. The polymer-graphite coating has a Mn-P interlayer and experienced the same third-body abrasion problem when the top coat was worn through to expose the interlayer to contact and rubbing.…”

Section: Lubrication Evaluation [51]mentioning

confidence: 99%

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High-Strength Lightweight Engines for Heavy-Duty Diesel Trucks

Muralidharan

Brady

Shyam

et al. 2018

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Section: Lubrication Evaluation [51]mentioning

confidence: 99%

Section: Lubrication Evaluation [51]mentioning

confidence: 99%

High-Strength Lightweight Engines for Heavy-Duty Diesel Trucks

Muralidharan

Brady

Shyam

et al. 2018

Self Cite

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“…Generally, increased clearance between the piston and the cylinder liner resulting from wear of the piston skirt is harmful to oil consumption and engine noise. Therefore, the friction and wear behavior of the piston skirt has a large effect on the performance of a piston and has become a focus point in the piston-cylinder system [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Friction and Wear Behavior of Cast Aluminum Alloy Piston Skirt with Graphite Coating Using a Designed Piston Skirt Test Apparatus

Teng

Wang

et al. 2022

Materials

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A piston skirt friction and wear apparatus that simulates the contact and the relative motion of piston and cylinder liner in a real engine has been designed and constructed. With this apparatus, the friction and wear behavior of a cast aluminum alloy piston with a graphite coating under different loads was studied, and the effectiveness of the apparatus was confirmed. The total wear of the piston skirt was higher under a higher load, and the upper part of the skirt surface (around the height of the piston pin) was worn more severely. The wear mechanisms were studied and, based on the test results and surface analyses, three main wear modes were believed to occur in the wear process of the piston skirt: abrasive, adhesive, and fatigue wear. The effects of skirt profile design, coating, and surface texturing on the friction and wear behavior of the piston skirt can be investigated well using the proposed apparatus, which can truly reflect actual working conditions and is useful to improve the tribological performances of piston skirts.

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“…Shanhong Wan et al (2017) investigated the integration of conventional ceramic coatings and hard amorphous graphite-like carbon (GLC) and applied them to the surface of the piston ring, which concluded that the presence of GLC not only resists the scuffing damage effectively for conventional chromium-based coatings and also improves the reliability of the piston rings. Shaw et al (2017) applied a graphite composite coating with a manganese phosphate (Mn-P) intermediate layer and a separate (Mn-P) coating to the piston skirt of a heavy-duty diesel engine. The results show that comparing with the sample, the friction force of the graphite composite coating sample in the three oils is reduced by 15%-30%.…”

Section: Introductionmentioning

confidence: 99%

Adaptability of piston skirt coatings on the tribological performance of heavy-duty diesel engine under low viscosity lubricant

Yin

Wang

et al. 2021

ILT

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Purpose The purpose of this paper was to improve the frictional wear resistance properties of piston skirts caused by the low viscosity lubricant by studying the tribological performance of three novel coating materials. Design/methodology/approach Comparative tribological examinations were performed in a tribological tester using the ring-block arrangement under two viscosity lubricants, the loading force was applied as 100 N, the speed was set to 60 r/min and the testing time was 180 min. Findings Under low viscosity lubricant, the friction coefficient and wear of the three coatings all increase, and the friction coefficient and wear of the PTFE coating are the largest, while the MoS2 coating has the lowest friction coefficient and wear. Under low viscosity lubricant, the friction coefficient of the MoS2 coating is 2.1%–5.4% and 20.0%–24.3% lower than that of the SiO2 and PTFE coating, respectively. The friction coefficient and wear fluctuation rate of the MoS2 coating is the smallest when the lubricant viscosity decreases, which indicates that the MoS2 coating has excellent stability and adaptability under low viscosity lubricant. Originality/value To reduce the piston skirt wear caused by low viscosity lubricant in heavy-duty diesel engines, the friction and wear adaptability of three novel composite coating materials for piston skirts were compared under 0 W-20 low viscosity lubricant, which could provide a guidance for the application of wear-resistant materials for heavy-duty diesel engine piston skirt.

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Tribological study of diesel piston skirt coatings in CJ-4 and PC-11 engine oils

Cited by 13 publications

References 18 publications

High-Strength Lightweight Engines for Heavy-Duty Diesel Trucks

High-Strength Lightweight Engines for Heavy-Duty Diesel Trucks

Investigation of Friction and Wear Behavior of Cast Aluminum Alloy Piston Skirt with Graphite Coating Using a Designed Piston Skirt Test Apparatus

Adaptability of piston skirt coatings on the tribological performance of heavy-duty diesel engine under low viscosity lubricant

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