Low Heat Capacitance Thermal Barrier Coatings for Internal Combustion Engines

Andrie, Michael; Kokjohn, Sage; Paliwal, Saager; Kamo, Lloyd; Kamo, Alex; Procknow, David

doi:10.4271/2019-01-0228

Cited by 30 publications

(28 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SiRPA coating was reported to give small improvements in thermal efficiency (< 2 %) and exhaust gas temperatures while reducing the energy transferred to the coolant. Similar coatings have been tested by various researchers, where similar improvements, albeit small, were observed [7,8,[10][11][12] with some researchers however, reporting a deterioration in fuel consumption when these coating where employed [13].…”

Section: Introductionsupporting

confidence: 63%

The Effect of an Active Thermal Coating on Efficiency and Emissions from a High Speed Direct Injection Diesel Engine

Papaioannou¹,

Leach²,

Davy³

et al. 2020

SAE Technical Paper Series

View full text Add to dashboard Cite

This study looked into the application of active thermal coatings on the surfaces of the combustion chamber as a method of improving the thermal efficiency of internal combustion engines. The active thermal coating was applied to a production aluminium piston and its performance was compared against a reference aluminium piston on a single-cylinder diesel engine. The two pistons were tested over a wide range of speed/load conditions and the effects of EGR and combustion phasing on engine performance and tailpipe emissions were also investigated. A detailed energy balance approach was employed to study the thermal behaviour of the active thermal coating. In general, improvements in indicated specific fuel consumption were not statistically significant for the coated piston over the whole test matrix. Mean exhaust temperature showed a marginal increase with the coated piston of up to 6 °C. However, the normalised exhaust enthalpy showed a reduction (apart from the higher speed/load conditions when no EGR was applied). Energy transfer to the coolant was reduced by as much as 1.5 percentage points, in agreement with the expected reduction in piston heat transfer, across all operating conditions. Finally, soot emissions were increased with the coated piston, with the biggest differences between the coated and non-coated pistons observed at the lower speed/load conditions.

show abstract

Section: Introductionsupporting

confidence: 63%

The Effect of an Active Thermal Coating on Efficiency and Emissions from a High Speed Direct Injection Diesel Engine

Papaioannou¹,

Leach²,

Davy³

et al. 2020

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 13, compared with the traditional strategy of thick, ceramic-coated heat insulation, TSHI facilitates the wall temperature fluctuation or swing with gas temperature throughout the cycle, thus leading to a lower surface temperature during the intake stroke and a higher temperature during the combustion stroke, which enables the reduction in heat loss without heating the intake air. Recently, an improved generation of low-heat-capacitance (thermal conductivity < 0.35 W/m-K, thermal heat capacitance < 500 kJ/m 3 -K, and density < 0.35 g/cm 3 ) thermal barrier coatings (TBCs) has been developed [76]. When applied to the piston and cylinder head in a natural gas engine, the updated TBC properties brought a 1.3% improvement in thermal efficiency and a 4.6% decrease in fuel consumption through lowered heat rejection, with no deterioration in volumetric efficiency or engine knock tendency [76].…”

Section: Low-cooling-loss Technologiesmentioning

confidence: 99%

A Review of Energy Loss Reduction Technologies for Internal Combustion Engines to Improve Brake Thermal Efficiency

Wang

Shuai

et al. 2021

Energies

View full text Add to dashboard Cite

Today, the problem of energy shortage and climate change has urgently motivated the development of research engaged in improving the fuel efficiency of internal combustion engines (ICEs). Although many constructive alternatives—including battery electric vehicles (BEVs) and low-carbon fuels such as biofuels or hydrogen—are being put forward, they are starting from a very low base, and still face significant barriers. Nevertheless, 85–90% of transport energy is still expected to come from combustion engines powered by conventional liquid fuels even by 2040. Therefore, intensive passion for the improvement of engine thermal efficiency and decreasing energy loss has driven the development of reliable approaches and modelling to fully understand the underlying mechanisms. In this paper, literature surveys are presented that investigate the relative advantages of technologies mainly focused on minimizing energy loss in engine assemblies, including pistons and rings, bearings and valves, water and oil pumps, and cooling systems. Implementations of energy loss reduction concepts in advanced engines are also evaluated against expectations of meeting greenhouse gas (GHG) emissions compliance in the years to come.

show abstract

“…One set of samples was sprayed by APS using solid powder YSZ feedstock, and it was a standard TBC sprayed in the industry nowadays for gas turbine applications. This sample was considered as reference sample as it has similar microstructure and thermal properties with other samples used in the previous studies for diesel engine applications (Ref 13,14). The second and the third TBCs were sprayed by SPS, both using YSZ suspension.…”

Section: Sample Sprayingmentioning

confidence: 99%

Suspension Plasma-Sprayed Thermal Barrier Coatings for Light-Duty Diesel Engines

et al. 2019

View full text Add to dashboard Cite

Demands for improved fuel efficiency and reduced CO 2 emissions of diesel engines have been the driving force for car industry in the past decades. One way to achieve this would be by using thermal spraying to apply a thermal insulation layer on parts of the engine's combustion chamber. A candidate thermal spray process to give coatings with appropriate properties is suspension plasma spray (SPS). SPS, which uses a liquid feedstock for the deposition of finely structured columnar ceramic coatings, was investigated in this work for application in light-duty diesel engines. In this work, different spray processes and materials were explored to achieve coatings with optimized microstructure on the head of aluminum pistons used in diesel engine cars. The functional properties of the coatings were evaluated in single-cylinder engine experiments. The influence of thermo-physical properties of the coatings on their functional properties has been discussed. The influence of different spray processes on coating formation on the complex piston head profiles has been also discussed. The results show that SPS can be a promising technique for producing coatings on parts of the combustion chamber, which can possibly lead to higher engine efficiency in light-duty diesel engines. Keywords diesel engines Á fuel efficiency Á microstructure Á suspension plasma spraying Á surface engineering Á thermal barrier coatings & Wellington Uczak de Goes wellington.uczak

show abstract

Low Heat Capacitance Thermal Barrier Coatings for Internal Combustion Engines

Cited by 30 publications

References 27 publications

The Effect of an Active Thermal Coating on Efficiency and Emissions from a High Speed Direct Injection Diesel Engine

The Effect of an Active Thermal Coating on Efficiency and Emissions from a High Speed Direct Injection Diesel Engine

A Review of Energy Loss Reduction Technologies for Internal Combustion Engines to Improve Brake Thermal Efficiency

Suspension Plasma-Sprayed Thermal Barrier Coatings for Light-Duty Diesel Engines

Contact Info

Product

Resources

About