We present a novel design of a single-cylinder free piston engine linear generator (FPELG) incorporating a linear motor as a rebound device. A systematic simulation model of this FPELG system was built containing a kinematic and dynamic model of the piston and mover, a magneto-electric model of the linear generator, a thermodynamic model of the single-cylinder engine, and a friction model betwe...

The oil cooling gallery is arranged at the top of the piston, which can effectively reduce the heat load of the piston. In this paper, finite element analysis and fatigue analysis by FE-safe are used to calculate the effects of the different positions of the oil cooling gallery to the temperature, stress field and the fatigue strength of the bowl rim, top land, first ring groove, second land an...

The research was carried out in order to develop a method for skipping fuel supplies (turning off individual piston strokes) at low frequencies of crankshaft rotations and partial engine operating modes with direct-acting supply systems increase efficiency. developed is easily implement using ring-type discharge valve electronic control. A made the form split elastic ring installed high-pressur...

To solve the problem between temperature and thermal stress of a titanium alloy piston, multi-objective optimization method combined response surface methodology experiment design is performed to calculate an optimal piston. Firstly, thermo-mechanical coupling analysis, static dynamic characteristics analysis are carried out. The results show that load has significant influence on Secondly, fiv...

The non-lubricated four-stage compressor which can compress up to 24.52 1\.fPa has been developed This newly developed compressor has high durability and efficiency in comparison with conventional non-lubricated compressors. For the purpose of improving durability, new technologies are adopted in this development. The plunger piston without piston rings is applied at the high pressure stages wh...

The study investigates the mechanism of ring-liner lubrication in the vicinity of the top and bottom dead centres of an internal combustion engine. Predicting lubricant transient behaviour is critical when the inlet reversal leads to thin films and inherent metal-to-metal interaction. It was found that the cavitation, which is located at the trailing edge of the contact before reversal, briefly...