Numerical and experimental investigation of a piston thermal barrier coating for an automotive diesel engine application

Caputo, Sabino; Millo, Federico; Boccardo, Giulio; Piano, Andrea; Cifali, Giancarlo; Pesce, Francesco Concetto

doi:10.1016/j.applthermaleng.2019.114233

Cited by 51 publications

(31 citation statements)

References 31 publications

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“…Applying the coating on the piston reduces fuel consumption by 1.3 %. These results confirm the benefits that thermal coatings could provide in the fuel consumption alleged by other authors [75].…”

Section: Fuel Consumption Pollutant Emissions and Engine Efficienciessupporting

confidence: 91%

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Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance

Cornejo¹,

Enrique²

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xx "If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward." Martin Luther King Jr, United States xxi Sub-and superscripts CoO Referred to cooling oil conv Referred to convection xxxiii comb Referred to combustion eff Referred to effective area embed Referred to embedded exh Referred to exhaust ext Referred to external wall temperature ThO Referred to thermal oil in Referred to inlet ind Referred to indicated int Referred to intake opt Referred to optimal out Referred to outlet sat Referred to saturation tot Referred to total resistance vap Referred to vaporization vol Referred to volumetric

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Section: Fuel Consumption Pollutant Emissions and Engine Efficienciessupporting

confidence: 91%

“…The use of these insulating materials allows achieving higher exhaust temperatures and this improves the performance of the aftertreatment systems, accelerating the catalyst light-off. Furthermore, the application of TBCs in combination with new calibration strategies can promote improvements in fuel economy [75,76].…”

Section: Thermal Barrier Coatingsmentioning

confidence: 99%

Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance

Cornejo¹,

Enrique²

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“…Therefore, measures that reduce knock, such as direct injection or water injection, are useful [9][10][11]. In addition, the reduction of wall heat losses is beneficial, which can be achieved by innovative approaches, such as thermal swing coating of combustion chamber surfaces [12,13]. For passenger car applications with spark-ignited engines, many investigations focus on the part-load operating points, where the engine is operated often but the efficiency is usually poor if no special measures are taken.…”

Section: Introductionmentioning

confidence: 99%

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

et al. 2021

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Spark-ignited internal combustion engines are known to exhibit a decreased brake efficiency in part-load operation. Similarly to cylinder deactivation, the x-stroke operation presented in this paper is an adjustable form of skip-cycle operation. It is an effective measure to increase the efficiency of an internal combustion engine, which has to be equipped with a variable valve train to enable this feature. This paper presents an optimization procedure for the exhaust valve timings applicable to any valid stroke operation number greater than four. In the first part, the gas spring operation, during which all gas exchange valves are closed, is explained, as well as how it affects the indicated efficiency and the blow-by mass flow. In the second part, a simulation model with variable valve timings, parameterized with measurement data obtained on the engine test, is used to find the optimal valve timings. We show that in 12-stroke operation and with a cylinder load of 5 Nm, an indicated efficiency of 34.3% is achieved. Preloading the gas spring with residual gas prevents oil suction and thus helps to reduce hydrocarbon emissions. Measurements of load variations in 4-, 8-, and 12-stroke operations show that by applying an x-stroke operation, the indicated efficiency remains high and the center of combustion remains optimal in the range of significantly lower torque outputs.

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“…A number of solutions have been developed during recent years, considering hugely mentioned impacts on engine performance during the warm‐up period 38,43‐47 : Thermal Barrier Coating (TBC) has small effects on fuel consumption; however, its impact on reducing the pollutants, mainly soot, is considerable. Standard insulation Installing heat exchangers along the exhaust gas stream to reduce the warm‐up period. Using phase change material (PCM) to improve engine thermal efficiency. Active controlling methods including preheating the coolant, the variable coolant flow …”

Section: Introductionmentioning

confidence: 99%

Energy and environmental enhancement of power generation units by means of zero‐flow coolant strategy

et al. 2021

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Summary Warm‐up period is considered as the most critical phase in the operation of any device that converts the energy of a fuel into heat, electricity, and other products, including power generation units since the system efficiency and environmental pollution levels are much worse than the normal operation in that phase. Considering this point, in this study, applying the zero‐flow coolant strategy to reduce the warm‐up period is suggested for power generation units and it is investigated in details. An internal combustion engine is selected as the case‐study and implementation of the method to enhance the performance of that from both energy and environmental aspects are studied comprehensively. As the results show, for the investigated engine, which has a capacity of 1.8 L, implementation of the method leads to 17% decrease in the warm‐up period. It is accompanied by 9.32% and 2.23% improvement in the amount of unburned hydrocarbon emission and fuel consumption. Moreover, based on the conducted discussion, despite other available methods to enhance systems that consume fuel, the method is so practical that it could be employed simply in an energy system without imposing a huge cost, which is taken into account as a significant advantage.

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Numerical and experimental investigation of a piston thermal barrier coating for an automotive diesel engine application

Cited by 51 publications

References 31 publications

Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance

Modelling of Heat Losses through Coated Cylinder Walls and their Impact on Engine Performance

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

Energy and environmental enhancement of power generation units by means of zero‐flow coolant strategy

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