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【正文】 可的松經(jīng)費盧薩卡定界符連鎖店經(jīng)費三角地方離開定界符開綠燈經(jīng)費獨立思考。關(guān)鍵詞數(shù)量為46個，每一關(guān)鍵詞之間用逗號分開，最后一個關(guān)鍵詞后不打標(biāo)點符號。關(guān)鍵詞：佛得角，內(nèi)燃機，拖拉機，電控 ABCDE FGHI JKLMNOP QRSTUV WXYZ英文摘要題目采用三號大寫字母，可分成13行居中打印。ABSTRACTThe fuel injection system of diesel engines is of great importance since it ontrols the bustion mechanism. The rate of injection and the speed of injected fuel are important parameters for engine operation, controlling the bustion and pollutants formation mechanisms. A fuel injection system simulation capable of predicting the performance of the injection system to a good degree of accuracy has been developed. The simulation is based on a detailed geometrical description of the injection system and in modeling each subsystem as a separate control volume. The simulation starts at the driving mechanism of the fuel pump and describes all parts of the system pump chamber, delivery valve, delivery chamber, connecting pipe and injector. The ponents of the system are put together and interact as they do in reality. From the cam geometry an analytical expression is derived that gives the pump piston lift as a function of the engine crank angle. The equations of continuity and momentum are solved using the method of characteristics inside the pump chamber using a constantly moving mesh with boundary conditions derived from the motion of the plunger, while up to now most researchers considered the pressure inside the pump chamber uniform. KEY WORD：researchers，considered，inside，chamber 符 號 說 明可根據(jù)實際情況有或無符號說明A 微換熱芯片橫截面積, mAb 微通道基部面積，m2Ach 單微通道面積，m2Afin 微通道換熱芯片的肋片總面積，m2c 與通道截面形狀有關(guān)的系數(shù)Cf 摩擦常數(shù)Cp 比定壓熱容C* 摩擦常數(shù)比Dh 微通道水力直徑，mDin 微通道進口水力直徑，mDmax 為通道最大內(nèi)切圓的面積, m2Dout 微通道出口水力直徑，md* 通道面積比(Dh/Dmax)f 達西摩擦阻力系數(shù)fapp 范寧阻力系數(shù)fin
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