Coatings for Improving Engine Performance

Kamo, Roy; Bryzik, Walter; Reid, Michael; Woods, Melvin

doi:10.4271/970204

Cited by 24 publications

(9 citation statements)

References 12 publications

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“…As a result, engine coolant and cylinder temperatures are strongly coupled. [1][2][3] An adequate liner temperature is beneficial for supporting the full and effective mixing of the inlet charge and facilitates complete combustion, [2][3][4][5][6] thus improving both fuel consumption 7 and emission-quality. 6 Furthermore, engine coolant temperature has been shown to have a strong effect on piston-liner friction work.…”

Section: Introductionmentioning

confidence: 99%

Cold start analysis of an engine coolant-MWCNT nanofluid: Synthesis and viscosity behavior under shear stress

Sica

Contreras

Filho

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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During cold start of internal combustion engines, coolant temperature, and thermal conductivity are key parameters in the heat transfer processes that ultimately affect pollutant emissions and engine performance. Hereupon the use of coolants with suspended nanoparticles, to enhance thermal conductivity, emerged as a promising technology. However, for Newtonian materials, viscosity also increases with nanoparticle concentration. To overcome increased pumping power, the use of non-Newtonian nanofluids makes such application potentially feasible, specifically for shear-thinning materials, in which a higher shear rate leads to reducing shear viscosity due to higher shear stress. Accordingly, a nanofluid, suitable for engine cooling (0.2 wt.% MWCNT-engine coolant/distilled water 30/70 v/v%), was here fabricated and mapped. Shear rate and temperature were varied, with focus on cold start investigation. Shear thinning and shear thickening regions were mapped according to the shear rate levels, for each temperature considered. The nanofluid behaved as shear-thinning material for the entire range of temperatures (−10°C–25°C). Above shear rates of 500 s−1 and flow curves with temperatures below −5°C, a prominent shear thickening behavior was observed. Additionally, the relative apparent viscosity data were compared with four classical models. Regarding the curve fitting parameters of a modified Herschel-Bulkley equation, above 0°C, the apparent yield stress, [Formula: see text], was invariant with temperature. Besides, for the temperature range from 0°C to 20°C, the flow index remained approximately constant. For temperatures above −5°C, infinite-shear-rate viscosity and consistency index presented a linear decrease and a third-degree polynomial-like behavior, respectively.

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Section: Introductionmentioning

confidence: 99%

Cold start analysis of an engine coolant-MWCNT nanofluid: Synthesis and viscosity behavior under shear stress

Sica

Contreras

Filho

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Providing ceramic coating on piston crown is an effective way of burning high viscous vegetable oils in Diesel engine by retaining the heat produced from combustion of the fuel in the combustion chamber. If the heat rejected to the coolant is reduced, thermal efficiency could be improved [19][20][21]. Also by the use of thermal barrier coated piston increases the peak pressure and heat release rate of the biodiesel fuel with increase in thermal efficiency and reduces the smoke, CO, and HC emissions [22,23].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a biodiesel fuelled diesel engine with the effect of alumina coated piston

Senthil¹,

Purushothaman

Rajan

2017

THERM SCI

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Biodiesel is one of the best alternative fuels to Diesel engine among other sources due to having potential to reduce emissions. Biodiesel is a renewable, biodegradable and environment friendly fuel in nature. The advantages of biodiesel are lower exhaust gas emissions and its biodegradability and renewability compared with petroleum-based diesel fuel. The energy of the biodiesel can be released more efficiently with the concept of semi adiabatic (thermal barrier coated piston) engine. The objective of this study is to investigate the performance and emission characteristics of a single cylinder direct injection Diesel engine using 25% biodiesel blend (rubber seed oil methyl ester) as fuel with thermal barrier coated piston. Initially the piston crown was coated with alumina (Al 2 O 3) of thickness of 300 micron (0.3 mm) by plasma coating method. The results revealed that the brake thermal efficiency was increased by 4% and brake specific fuel consumption was decreased by 9% for B25 with coated piston compared to uncoated piston with diesel. The smoke, CO, and HC emissions were also decreased for B25 blend with coated piston compared with the uncoated piton engine. The combustion characteristics such as peak pressure, maximum rate of pressure rise, and heat release rate were increased and the ignition delay was decreased for B25 blend for the coated piston compared with diesel fuel.

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“…Among various fuels tested in diesel engines, alcohols are considered as good substitute for diesel because these are bio-based and renewable. But due to the alcohol properties it requires high compression ratio in the diesel engines 1 , which makes the engine bulky. So in the present work a ceramic coated engine is developed with the insulation of the combustion chamber 2,3,4 .…”

Section: Introductionmentioning

confidence: 99%

Investigations on Ceramic Coated Diesel Engine With Brass Piston Material

Reddy¹,

Pandurangadu

2014

J. mech. eng.

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With the enormous energy demand and environmental concern the interest on the alternate fuels tothe diesel engines has been increased. Among all the fuels alcohols have received a considerable attentionbecause these are bio-based, renewable and are oxygenated. But due to its properties they require higheroperating temperatures in the combustion chambers. Hence in the present work a ceramic coated insulatedengine is developed by incorporating an air gap between piston skirt and crown for the study of alcoholsperformance and emission characteristics. The combustion efficiency depends on the mixture strength, pistonmaterial and turbulence in the chamber. So, in this work an attempt is made with brass piston and brass insertwith nine and twelve grooves. Among all the pistons tested the brass insert with nine grooves is best in terms ofengine performance and emissions. With the elevated temperatures the main problems faced are drop involumetric efficiency and lubricating oil deterioration and can be avoided with turbo compounding system andnew lubricants.DOI: http://dx.doi.org/10.3329/jme.v44i1.19492

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Coatings for Improving Engine Performance

Cited by 24 publications

References 12 publications

Cold start analysis of an engine coolant-MWCNT nanofluid: Synthesis and viscosity behavior under shear stress

Cold start analysis of an engine coolant-MWCNT nanofluid: Synthesis and viscosity behavior under shear stress

Performance analysis of a biodiesel fuelled diesel engine with the effect of alumina coated piston

Investigations on Ceramic Coated Diesel Engine With Brass Piston Material

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