张朝阳1,2, 孙山峰1,2, 韩景峰1,2
1.内燃机可靠性国家重点实验室，山东潍坊261061；2.潍柴动力股份有限公司，山东潍坊261061
摘要：基于AMESim建立高压油泵的仿真模型，包括低压油路、燃油比例控制阀、凸轮、柱塞偶件、出油阀、进油阀等，利用仿真模型分析低压油路参数、柱塞顶隙容积对油泵供油效率的影响，通过高压油泵试验台试验对比验证仿真模型的准确性。结果表明：低压油路的控制压力较小时，油泵供油效率随着泄压阀控制压力的增大明显增加；当压力达到一定值之后，供油效率缓慢增加；在相同条件下，转速越高油泵供油效率越高；油泵供油效率随进出油阀余隙容积增加而逐渐降低。
关键词：高压油泵；仿真；供油效率；低压油路；进出油阀
Abstract:The numerical simulation model of highpressure pump including low pressure pipes, IMV valve, campiston assembly, outlet valve, inlet valve is established by the software of AMESim, and the simulation model is validated by real test. The pump efficiency impact by low pressure pipes and plunger headspace is also analysed. The research shows that the efficiency of the fuel pump arises dramatically with the increase of control pressure of the release valve when the pressure of lowpressure fuel loop is relatively low. But when the pressure reaches a certain level, the efficiency arises slightly, even could be considered as constant. Under the same conditions, the fuel pump efficiency arises with the engine speed.As the volume increase of both inlet and outlet valves, the pumping efficiency decreases gradually.
Keywords:high pressure pump; simulation; fuel pump efficiency; low pressure pipes; inlet and outlet valves
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