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The Piston assembly friction loss contributes for larger part in the engine frictional loss. In order to reduce the frictional loss due to piston assembly motion, a complete model describing the dynamics of assembly is necessary. This paper presents a model to study the primary and secondary motion of piston and also a model for determination of frictional losses in the piston assembly of an automotive Internal Combustion Engine. A mixed lubrication model based on a two-dimensional Reynolds equation is presented to use in conjunction with a piston secondary motion analysis.

This paper gives a new approach for fluid-structure interaction of servovalve component actuator using finite element method. FE approach gaining a more advancement in dynamic analysis of structural components. For fluid flow analysis, computational fluid dynamics software’s like fluent were frequently used. The fluid-structure interaction is challenging issue in finite element field. An attempt has been made to interact hydraulic component piston and cylinder with fluid using special purpose hydrostatic fluid elements along with general-purpose solid elements. The positioning of piston depends upon the flow rate from control ports and the amount of load to be moved. In this paper an emphasis was made on actuator dynamics for different fluid property. The fluid property like fluid bulk modulus, expansion coefficient plays the major role in all type of hydraulic components. Bulk modulus of fluid changes drastically due to the entrapment of air bubbles in the fluid.

The paper presents the results of a Finite Element study of a piston ring under assembly load in terms of the induced stresses and ring gap. The study includes the stress analysis at the interface between the coating and substrate of the ring for various lay designs. The information from the analysis would serve to reduce the design-performance testing cycle time and be useful in the development of coating techniques.

Internal corrosion resistance of radiators and heaters is becoming more important as automotive manufacturers seek durability past 10 years, and as the usage of aluminum heat exchangers spreads to markets with poorly maintained engine coolant fluid from a corrosion inhibition standpoint. Simulated Service Corrosion Tests (SSCT) are used to evaluate the resistance of three aluminum alloys to tube failure in various corrosive water and depleted coolant conditions. The paper documents results from such tests that lead to two major conclusions: (1.) A weakly inhibited Oyama water solution with a silicated North American engine coolant is highly effective in ranking internal liner alloys for their pitting corrosion resistance, and (2.) AA7072 lined tubes exhibit superior pitting corrosion resistance compared to 1XXX lined tubes. Electrochemical test data obtained in a simulated pit electrolyte and the bulk test solution are utilized to develop an understanding of the SSCT results.