亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

The rapid prosperity of automotive market in China poses serious environmental problems. Therefore, combustion emissions such as NOx and soot draw much attention in recent years. However, in addition to them, fuel evaporation emissions account for large proportion of pollution from automobiles. The fuel evaporation control system in the gasolineengine vehicle effectively inhibits the fuel vapor emission, which is beneficial to both pollution reduction and improvement of heat efficiency. Solenoid valve is one of the key parts in the fuel evaporation control system. It can accurately control the mass of gasoline vapor which strip out from the carbon canister by opening or closing the solenoid valve and ensure the smooth operation of the gasoline engine. Dynamic response characteristics of the solenoid valve have an important influence on the capacity of inhaling gasoline vapor into the intake manifold, thereby it attracts much attention. Actually, due to advantages such as structural simplicity, rapid action, low manufacturing cost and low energy consumption, solenoid valves are widely used in machinery, vehicle, aerospace and other industries. The effects of coil number of turns, wire diameter, core materials and armature mass on the response behavior, impact noise and energy consumption were explored by means of the software Ansoft Maxwell and orthogonal design method. Finally, optimization on the integrated performance of the solenoid valve was achieved to get the best comprehensive performance.