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黑龍江工程學(xué)院畢業(yè)設(shè)計
摘 要
現(xiàn)代汽車工業(yè)已經(jīng)進入成熟的發(fā)展階段，汽車也由單純的機械產(chǎn)品發(fā)展為高級的機電一體化產(chǎn)品，使得單片機應(yīng)用技術(shù)在現(xiàn)代汽車中得到了廣泛的應(yīng)用和發(fā)展。大眾GTX發(fā)動機半實物仿真系統(tǒng)臺的設(shè)計,主要依據(jù)汽車電子控制技術(shù)實驗實訓(xùn)教學(xué)的需要,實現(xiàn)汽車電控系統(tǒng)的原理演示、故障設(shè)置、診斷測試等教學(xué)功能，以達到輔助汽車專業(yè)教學(xué)的目的。結(jié)合實驗臺，方便學(xué)生了解汽車電控系統(tǒng)與單片機控制技術(shù)相結(jié)合的原理，培養(yǎng)學(xué)生的工程實踐能力。該系統(tǒng)的制作以從捷達發(fā)動機上所采的數(shù)據(jù)流為參考依據(jù), 對大眾系列車型具有針對性。
系統(tǒng)的設(shè)計思想是，以單片機控制為核心，利用單片機輸出的信號來模擬各種傳感器信號 ，控制實驗臺上的點火裝置和噴油裝置，從而使實驗臺在脫離發(fā)動機本體的情況下進行點火和噴油的教學(xué)演示，實現(xiàn)實驗臺的正常工作。在單片機輸出信號正常的情況下，檢測汽車電子控制單元是否正常工作，并通過與外部設(shè)備進行合理匹配，實現(xiàn)數(shù)據(jù)流的測試分析，對發(fā)動機進行故障診斷。實驗臺結(jié)構(gòu)緊湊，操作簡便，教學(xué)效果直觀生動，能滿足汽車實驗實訓(xùn)的教學(xué)要求。
關(guān)鍵詞：半實物仿真；電子控制；單片機；信號模擬；電控燃油噴射；故障診斷
ABSTRACT
The modern’s automobile industry has already entered the mature development phase, so the automobile also by the pure mechanical product development for senior integration of machinery product, so SCM makes use of modern technology in vehicles has been widely applied and developed. Public GTX engine hardware-in-the-loop simulation system design The experiment table’s research and design, based primarily on automotive electronic control technology experimental practice teaching needs, realizes teaching function and so on system principle demonstration, fault setup, diagnostic tests for automobile electrically controlled, and achieve the purpose of assistance teaching. Based on experiment table can help student understood the automobile electrically controlled system and the monolithic integrated circuit control technology unifies the principle, raises student's project practice ability. Manufacture for the experiment table, take reaches the data flow form the Jetta’s engine of VW Automobile, has targeted for the VW’s Automobile.
The idea of the design for system , take the monolithic integrated circuit control as the core, outputs the signal using the monolithic integrated circuit to simulate each kind of sensor signal, controls the firing device and injection devices in the experiment table. Thus causes the experiment in to be separated from the engine main body in the situation to carry on the firing and the injection teaching demonstration, realizes it normal work. when the SCM output normal signal ,can detection the automobile’s Electronic Control Unit whether normal work, realizes tests and analysis for data flow, through match with the external instrumentation reasonably , diagnosis to the engine. Experiment table structure compact, operation is simple, the teaching effect direct viewing and vivid, can satisfy the teaching request which the automobile practical training for teaching.
Key word: The hardware-in-the-loop simulation; Electronic control; Monolithic integrated circuit ; Signal imitation; Electronic -controlled fuel oil injection; Diagnostics
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