Steady-State Temperature Field Analysis Of Solenoid Valve Used On Passenger Car Engine Oil Pump

Solenoid valve is widely used magnetic component. It can be apply to both pneumatic and hydraulic switches, and also could be used in mine, household appliances and transportation.Solenoid valve is important for automotive industry. As the rapid growth of passenger car market, more and more requirement had been apply to the solenoid valve. The VDVP technology, which use solenoid valve as core knowledge, had been introduced to midrange of passenger cars. Engine oil pump has tough working temperature. In order to lubricating different system and take away additional heat, high temperature is needed for engine oil to keep proper viscosity. Normally working temperature is 120 degree C, Unfortunately, solenoid valve, which mounted on oil pump, is an electrical device. Additional heat will be created when energize. This is tough challenge for the design of solenoid valve. Good solenoid valve has excellent function with engine oil pump to reduce fuel consumption; Bad solenoid valve can’t endure tough temperature and then malfunction. Automotive parts could be damaged as less engine oil for lubricating. In order to produce solenoid valve with high performance and long life with so tough temperature condition, the only way is getting more understanding of the thermal characteristic of solenoid valve. Otherwise, the solenoid could be in malfunction or damaged earlier; Not only the performance, but also the material selection should according to temperature characteristic of solenoid valve.The analysis of this article is based on solenoid valve in VDVP (Variable Displacement Vane Pump) technology. First, get familiar with function and internal structure; introduce the type of solenoid valve and criteria of performance. Temperature characteristic of solenoid valve define the selection of material. Different working temperature needs different enameled copper wire and resin. Then simplify the solenoid internal structure and set up the math model, analysis the heat generation, heat transfer and heat dissipation. The temperature field and main path for heat transfer have been known. Also, set up the math model of winding, which base on heat conduct theory, and calculate the thermal conductivity of winding. After that, the simulation model has been set up base on certain boundary condition, and shows the temperature contour. According to the analysis result, the key factor of heat transfer founded, and useful for design optimization. At last, a specific designed experiment to verify the winding thermal conductivity and temperature field of solenoid valve. The analysis result could be reference for other solenoid valve designer to find out temperature field calculate method.