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單缸電控單體泵低壓油路供油特性
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國防“973”資助項目（97361357）


Characteristics of Fuel Supply Loop for Electronic Unit Pump Fuel System
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    摘要:

    進行了單缸電控單體泵試驗臺實驗，分析了電控單體泵電磁閥在動作和不動作時低壓油路燃油壓力之間的關(guān)系，結(jié)果表明其不動作時的燃油壓力狀態(tài)可以表征單體泵電磁閥工作時的燃油壓力狀態(tài)；建立并校核了低壓油路的AMESim仿真模型，獲得了泵端及柱塞腔內(nèi)燃油壓力之間的關(guān)系，進而采用泵端壓力代替柱塞腔內(nèi)壓力來進行電控單體泵充油過程分析；分析了單體泵泵端燃油壓力，計算了充油時間，討論了不同轉(zhuǎn)速和供油壓力下充油時間的影響規(guī)律，并通過充油時間表征了低壓油路的供油能力；探討了不同供油壓力下低壓油路的充油臨界轉(zhuǎn)速，確定了適合全工況范圍最佳供油壓力為0.6 MPa，并分析了柱塞腔充油不足對電控單體泵燃油系統(tǒng)的影響。結(jié)果表明計算的充油時間可確定單體泵的臨界充油轉(zhuǎn)速，從而確定最佳供油壓力來保證燃油噴射系統(tǒng)在高壓大流量下的循環(huán)供油穩(wěn)定性。

    Abstract:

    The relationship of fuel pressure in fuel supply loop between the solenoid movement was analyzed at first. The results indicated that the consistency of the fuel pressure showed good. Secondly, the simulation model of fuel supply loop was established and validated by AMESim in which the relationship of the high pressure between electronic unit pump (EUP) and the inner of plunger chamber was obtained. Thirdly, the fuel pressure near to the EUP was analyzed, the time of fuel filling was calculated and the effect of it at different fuel supply pressures and speeds was discussed. Finally, the threshold speed of fuel filling process at different fuel supply pressures was analyzed, and the optimal fuel supply pressure was fixed which adapted to all engine conditions. Simultaneously, the effect of insufficient fuel filling was discussed. 

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王裕鵬,劉福水,劉興華,陳宇航.單缸電控單體泵低壓油路供油特性[J].農(nóng)業(yè)機械學報,2011,42(5):24-29. Wang Yupeng, Liu Fushui, Liu Xinghua, Chen Yuhang. Characteristics of Fuel Supply Loop for Electronic Unit Pump Fuel System[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(5):24-29.

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