Piston Temperature Measurement in Internal Combustion with Telemetric Method

Ishibashi, Akira; Nakamura, Muneaki; Muramatsu, Hitoshi

doi:10.4271/2014-32-0051

Cited by 8 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slight angular shift in maximal temperature that can be observed between the two operating points is due to different combustion timings. These results also show that the base temperature before combustion is already very high compared to what could be expected for such operating points in usual engines (surface temperatures in the range of 200-250°C are usually reported for full load operating points [18]). This very high base temperature can be explained by the specific architecture of the optical engine, and especially by the absence of oil cooling on the lower part of the piston (neither oil projection nor oil jets).…”

Section: Temperature Swing Measurementsoptical Scesupporting

confidence: 67%

Experimental assessment of new insulation coatings for lean burn spark-ignited engines

Cherel

Zaccardi

Bouteiller

et al. 2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Clean and highly efficient internal combustion engines will still be necessary in the future to meet the ambitious CO2 emissions reduction targets set for light-duty vehicles. The maximal efficiency of stoichiometric Spark-Ignited (SI) gasoline engines has been steadily increasing in recent years but remains limited by the important relative share of cooling losses. Low heat rejection engines using ceramic barrier coatings have been presented in the past but smart insulation coatings are gaining a renewed interest as a more promising way to further increase the engine maximal thermal efficiency. This article is highlighting some important effects of smart insulation coatings developed for lean-burn spark-ignited gasoline engines. Five different coatings with low heat conductivity and capacity are applied on aluminum engine parts with the atmospheric plasma spray technique and are tested with two different engines. The laser induced phosphorescence technique is firstly used in an optical single cylinder engine to quantify the thermal performance of these coatings in terms of temperature swing during combustion. A maximal increase in the piston surface temperature of around 100 °C is measured at low load, confirming thus the expected impact of the low heat conductivity and capacity, and suggesting thus a positive impact on fuel consumption. Thanks to the tests performed with a similar metal single cylinder engine, it is shown that the unburned hydrocarbon emissions can significantly increase by up to 25% if the open porosity on top of the coating is not properly sealed, while the surface roughness has no impact on these emissions. When applied on both the piston and the cylinder head, the optimized coating displays some distinct effects on the maximal heat release rate and NOx emissions, indicating that the thermal environment inside the combustion chamber is modified during combustion. Thanks to the temperature swing between cold and hot engine phases the volumetric efficiency can also be kept constant. However, no increase in efficiency can be measured with this optimized coating which suggests that the heat balance is not affected only by the reduction in the temperature differential between the walls and the gas.

show abstract

Section: Temperature Swing Measurementsoptical Scesupporting

confidence: 67%

Experimental assessment of new insulation coatings for lean burn spark-ignited engines

Cherel

Zaccardi

Bouteiller

et al. 2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

show abstract

“…Many methods are applied to measure the piston's temperature, such as fusible alloy, hafnium, TP, display coating and the thermocouple method. [29][30][31][32][33] Because of its convenient installation, flexible detection and the low amount of damage to the structure, the TP method was selected to measure the piston's temperature distribution. A total of 18 measurement points was arranged, which were mainly distributed in the combustion chamber, the fire shore and the piston skirt, as shown in Figure 7.…”

Section: Temperature Measurement and Errormentioning

confidence: 99%

Evaluation and sensitivity analysis of a piston’s thermal load in a high-power diesel engine

Yang

Dong

2021

International Journal of Engine Research

View full text Add to dashboard Cite

Optimising the parameters of valve timing and fuel system can promote the applications of high-power diesel engines that have high efficiency and low emissions. Nevertheless, the problem of the piston’s thermal load needs to be considered. In this paper, a calculation model for the working process of a high-power diesel engine and a finite element model of the piston’s thermal load were established. The piston’s thermal boundary conditions were determined and applied to the calculation of the piston’s thermal load, and the key temperature points of the piston were measured using the temperature plug method to verify the correctness of the model. Subsequently, analysis of the patterns of the piston’s thermal load’s evaluation parameters was carried out with the influencing factors based on the valve timing and the fuel system. The sensitivity and the weighting between the evaluation parameters and influencing factors were analysed using the Grey Correlation method. A new method for the comprehensive evaluation index of the piston’s thermal load with the influencing factors was proposed and applied. The research results show that the margin of error of the piston’s thermal load’s model was small, and sensitivity analysis revealed correlation between the influencing factors and the evaluation parameters of the piston’s thermal load, the comprehensive evaluation method could quantitatively analyse the piston’s thermal load.

show abstract

“…Numerous measurement techniques have been developed to acquire the piston temperature, such as templug method, 5,6 electrical contact method, 7,8 memory type method, 9 wireless telemetry method, [10][11][12] and optical method. 13,14 But each measurement method has its own shortcomings and is not suitable for online monitoring.…”

Section: Introductionmentioning

confidence: 99%

Online prediction of the piston maximum temperature in dual-fuel engine

Xiao

2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Diesel–natural gas dual-fuel engine has become a hot research topic in recent years because of its excellent power and economy. However, the reliability of the dual-fuel engine does not meet the requirements of practical application. The piston maximum temperature of dual-fuel engine easily exceeds the security border. Toward this, this article presents a relational model to real-timely predict the piston maximum temperature of dual-fuel engine. Specifically, some easy-measured engine indirect signals, including NOx emission, excess air coefficient, and engine speed, are employed as the model inputs. The piston maximum temperatures, as the only output, are acquired offline by finite element analysis in ANSYS. Support vector regression is employed to solve the prediction model parameters. Cross-validation is introduced to determine some intermediate variables formed in the process of building model. Experiments revealed that the proposed model produces satisfying predictions with deviations less than 7°C. Thus, this study provides an effective method to monitor the piston maximum temperature state of dual-fuel engine in real time.

show abstract

Piston Temperature Measurement in Internal Combustion with Telemetric Method

Cited by 8 publications

References 1 publication

Experimental assessment of new insulation coatings for lean burn spark-ignited engines

Experimental assessment of new insulation coatings for lean burn spark-ignited engines

Evaluation and sensitivity analysis of a piston’s thermal load in a high-power diesel engine

Online prediction of the piston maximum temperature in dual-fuel engine

Contact Info

Product

Resources

About