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  本文選題：天然氣 + 摻燒ECU�。� 參考：《華南理工大學》2015年碩士論文

【摘要】：近年來大氣污染日益嚴重,汽車尾氣是主要污染源之一,因此其排放標準越來越嚴格。另外由于石油燃料的過度開采導致石油資源日益匱乏,迫于環(huán)境保護和能源儲備的雙重壓力,汽車替代燃料的研究顯得刻不容緩,天然氣因其優(yōu)良的特性成為目前最實用的車用替代燃料。根據(jù)我國汽車行業(yè)發(fā)展的現(xiàn)狀,希望在不改變柴油機內(nèi)部結(jié)構(gòu)的前提下,通過摻燒的方式將天然氣應(yīng)用于柴油發(fā)動機。因此開發(fā)一款通用的摻燒發(fā)動機電子控制單元(ECU)具有重大的戰(zhàn)略意義和實用價值。論文所開發(fā)的摻燒發(fā)動機電控系統(tǒng)是基于國內(nèi)外主流的高壓共軌式柴油機,是在原柴油機電控系統(tǒng)的基礎(chǔ)上增加一套并行的主動摻燒ECU和額外傳感器裝置。通過改善控制手段來優(yōu)化摻燒的燃燒過程,從而達到通過摻燒天然氣的方式,在僅使用氧化型催化器的條件下就能夠?qū)崿F(xiàn)低排放指標。開發(fā)的摻燒ECU與原柴油ECU是并行的關(guān)系:純柴油模式下柴油噴嘴的控制權(quán)屬于原柴油ECU;摻燒模式下,摻燒ECU獲取柴油噴嘴的控制權(quán),而且原柴油ECU不會產(chǎn)生誤報警。因此開發(fā)的摻燒ECU不僅具備天然氣噴射功能,而且還能夠?qū)崿F(xiàn)柴油噴射的主動控制和燃燒模式的切換。根據(jù)摻燒ECU的設(shè)計要求和控制思想,論文完成了摻燒ECU的硬件電路設(shè)計,具體包括電源電路、控制電路、信號處理電路、電子節(jié)氣門驅(qū)動電路、天然氣和柴油的噴射電路以及通信電路。論文針對摻燒電控系統(tǒng)的核心電路—柴油噴射控制電路給出了具體的編程實現(xiàn)流程圖。最后進行了臺架實驗,測試表明設(shè)計的天然氣驅(qū)動電路能夠很好地完成天然氣的噴射控制。
[Abstract]:In recent years, air pollution is becoming more and more serious, automobile exhaust is one of the main pollution sources, so its emission standard is becoming more and more strict. In addition, due to the oil resources being increasingly scarce due to the over-exploitation of petroleum fuels, the study of alternative fuels for automobiles is urgent because of the dual pressure of environmental protection and energy reserves. Natural gas has become the most practical alternative fuel for vehicles because of its excellent characteristics. According to the present situation of automobile industry in China, it is hoped that natural gas can be used in diesel engine by blending combustion without changing the internal structure of diesel engine. Therefore, it is of great strategic significance and practical value to develop a general electronic control unit (ECU) for mixed combustion engine. The electric control system developed in this paper is based on the domestic and foreign mainstream high pressure common-rail diesel engine. It is to add a set of parallel active blending ECU and extra sensor device to the original diesel engine electronic control system. The combustion process of mixed combustion can be optimized by improving the control method, so that the low emission target can be achieved under the condition of using only oxidized catalytic converters by mixing natural gas. The developed ECU has a parallel relationship with the original diesel ECU: the control power of diesel nozzle belongs to the original diesel ECU in pure diesel mode, and the control power of diesel nozzle is obtained by blending ECU in mixed mode, and the ECU of original diesel does not cause false alarm. Therefore, the developed ECU not only has the function of natural gas injection, but also can realize the active control of diesel injection and the switching of combustion mode. According to the design requirements and control idea of ECU, the hardware circuit design of ECU is completed, including power supply circuit, control circuit, signal processing circuit, electronic throttle drive circuit. Gas and diesel injection circuit and communication circuit. In this paper, the programming flow chart of diesel injection control circuit, which is the core circuit of blending electric control system, is given. Finally, a bench test is carried out, and the test results show that the designed natural gas drive circuit can complete the natural gas injection control well.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TK402

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本文編號：2043811