本文選題：平地機　切入點：發(fā)動機變功率控制　出處：《長安大學》2013年碩士論文　論文類型：學位論文

【摘要】：平地機是一種以鏟刀作業(yè)為主的輪式牽引機械。鏟刀工作阻力是平地機主要的負荷來源，其變化范圍較大。目前國產(chǎn)平地機普遍存在的問題是：小負荷工況作業(yè)時，發(fā)動機功率利用率不高，產(chǎn)生功率富余，經(jīng)濟性較差；大負荷工況作業(yè)時，輪胎打滑嚴重，磨損劇烈。 本文在總結(jié)國外主流平地機發(fā)展現(xiàn)狀的基礎(chǔ)上，研究了變功率控制這一關(guān)鍵技術(shù)的方法。針對國內(nèi)常見的液力傳動平地機，，分析了行駛驅(qū)動系統(tǒng)各主要傳動元件的特點，并以某國產(chǎn)215馬力液力式平地機為對象進行了發(fā)動機變功率控制方法的研究，通過功率計算為發(fā)動機配置了幾條不同的功率曲線，提出了基于作業(yè)檔位的發(fā)動機變功率控制方案。在此基礎(chǔ)上對動力系統(tǒng)進行了匹配計算，并根據(jù)特定的指標對匹配結(jié)果的合理性進行了評價。分別以Inter Control DCF控制器和Prosyd1131為硬、軟件開發(fā)平臺，為新樣機設(shè)計開發(fā)了發(fā)動機變功率控制與電子油門控制程序，程序?qū)崿F(xiàn)正常運行。為了進一步驗證變功率控制及匹配結(jié)果的合理性，進行了牽引性能和油耗性能試驗。試驗結(jié)果表明：采用變功率控制的新樣機能滿足平地機對牽引力的需求，且在中小負荷下牽引效率有所提高；輪胎打滑損失減少；發(fā)動機空轉(zhuǎn)油耗及樣機空行駛油耗均降低。
[Abstract]:The grader is a kind of wheeled traction machine which is mainly used for scraper operation. The working resistance of the scraper is the main load source of the grader, and its variation range is large. At present, the common problem of the domestic grader is: when working under small load, Engine power utilization is not high, power surplus is produced, economy is poor, tire skid is serious and wear is severe. On the basis of summing up the development of mainstream leveling machines abroad, this paper studies the method of variable power control, and analyzes the characteristics of the main driving components of driving drive system, aiming at the common hydraulic drive leveling machines in China. The variable power control method of a domestic 215 horsepower hydraulic grader is studied. Several different power curves are arranged for the engine by power calculation. An engine variable power control scheme based on operating gear is proposed. On the basis of this, the matching calculation of the power system is carried out, and the rationality of the matching result is evaluated according to the specific index. The Inter Control DCF controller and Prosyd1131 are used as the hardware, respectively. On the software development platform, the engine variable power control and electronic throttle control programs are designed and developed for the new prototype. The program runs normally. In order to further verify the rationality of the variable power control and matching results, The traction performance and fuel consumption performance are tested. The results show that the new prototype with variable power control can meet the need of tractive force of the grader, and the traction efficiency is improved under medium and small load, and the tire skid loss is reduced. Engine idling fuel consumption and prototype empty running fuel consumption are reduced.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU623.6

【引證文獻】

相關(guān)碩士學位論文 前1條

1 張廣輝;推土機閉鎖式液力變矩器與閉鎖控制研究[D];長安大學;2015年

本文編號：1641355