A thermomechanical model of a direct injection diesel engine piston

Abstract

This article presents a three-dimensional finite element full analysis, which describes the thermomechanical behaviour of a direct injection diesel engine piston. The piston moving in a complex environment is exposed to several interactions during engine operation. The thermomechanical model takes in account the most important load. The piston is subjected to the coupled action of the thermal loads due to the transfer of heat from the head to the body and the mechanical load represented by the combustion pressure and the inertial load due to the important change of direction of the piston in the cylinder bore. The response of the simulated model by critical loads makes it possible to know and to analyse the operating temperatures, the corresponding thermal expansion and the thermomechanical deformations and stresses. The results obtained will be the source data for the development of a global elastohydrodynamic model and will provide a good tool for piston design.

Thermal analysis of an SI engine piston using different combustion boundary condition treatments

“…The convective heat transfer coefficient in the waterjacket, h water , is used to calculate R 4 [5]. The values of convective heat transfer coefficients for each cylinder are shown in Table 3.…”

“…His numerical results matched with experiment well. Abbas et al [5] developed a threedimensional finite element full analysis which describes the thermo-mechanical behavior of direct injection diesel engine piston. The piston was subjected to the coupled action of thermal and mechanical loads.…”

Thermal Modelling of a Marine Diesel Engine Piston

“…He showed that skirt contours play an important part in the reduction of scuffing and friction. Finite element models of pistons for high-speed direct injection (HSDI) diesel engines were developed and showed the influence of the thermal interaction on the design and development of pistons [7,8].MTahar Abbes et al [9] described thethermomechanical behaviour of a direct injection diesel engine piston by presenting a three dimensional finite element full analysis.…”

Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect

“…According to the structure of piston head and bore, shown in Figure 3, in order to get the gas temperatures in land volumes and groove volumes, it is important to know the temperature distribution of piston head and bore. In recent years, finite element method has been used to calculate piston temperature [21][22][23][24][25][26][27][28][29]. It should be noticed that after having identified one correlation for one engine, we acknowledge that those correlation parameters are not valid for another engine with similar characteristics.…”