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不同海拔下柴油機可調(diào)二級增壓系統(tǒng)的經(jīng)濟(jì)性調(diào)節(jié)方法
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部委基礎(chǔ)科研項目（D2220112901）


Regulated Method Based on Fuel Economy for Regulated Two-stage Turbocharging System of Diesel at Different Altitudes
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    摘要:

    在6V柴油機原機模型校核的基礎(chǔ)上，按照高原匹配策略匹配了可調(diào)二級增壓系統(tǒng)，并搭建了可調(diào)二級增壓柴油機性能仿真模型。研究了不同海拔環(huán)境下(0 m和4.5 km)高壓級渦輪旁通流量率對柴油機性能參數(shù)的影響規(guī)律，分析了旁通流量率對柴油機燃油經(jīng)濟(jì)性的影響機理，以及海拔環(huán)境對柴油機二級增壓系統(tǒng)調(diào)節(jié)規(guī)律的影響。得到了不同海拔環(huán)境下(0 m和4.5 km)高壓級渦輪旁通流量率的經(jīng)濟(jì)性調(diào)節(jié)規(guī)律和可靠性調(diào)節(jié)規(guī)律。相較于可靠性調(diào)節(jié)規(guī)律，經(jīng)濟(jì)性調(diào)節(jié)規(guī)律的調(diào)節(jié)范圍更加寬廣，能夠顯著降低調(diào)節(jié)區(qū)域的燃油消耗率。4.5 km海拔環(huán)境下經(jīng)濟(jì)性調(diào)節(jié)規(guī)律的調(diào)節(jié)區(qū)域比0 m海拔環(huán)境下經(jīng)濟(jì)性調(diào)節(jié)規(guī)律的調(diào)節(jié)區(qū)域窄。在低負(fù)荷時，4.5 km海拔環(huán)境下燃油消耗率比平原時低，中高負(fù)荷時比平原時高

    Abstract:

    A regulated two-stage turbocharging system was matched for a 6V diesel engine for the purposes of improving its performance at plateau，as well as solving the problems of turbo surge, overspeed and overheat of exhaust when diesel engine running at high altitude (4.5 km). The simulation model of the regulated two-stage turbocharging diesel engine at different altitudes (0 m and 4.5 km) was set up based on the calibrated original diesel engine model. The influence rule of bypass flow rate of high-pressure stage turbine on the performance parameters of diesel at different altitudes (0 m and 4.5 km) was studied. And the influence mechanism of bypass flow rate of high-pressure stage turbine on fuel economy was analyzed, IMEPg and PMEP were key factors which seriously affected the BSFC when adjusted the bypass flow rate of high-pressure stage turbine. Meanwhile, the influence rule of altitude on IMEPg and PMEP was illuminated, which could be used to explain the influence mechanism of altitude on BSFC of diesel engine. The economic regulated law and reliability regulated law of the turbo system at different altitudes (0 m and 4.5 km) were obtained through the optimization of bypass flow rate. The range of economic regulated law was wider than that of reliability regulated law, and it could observably reduce the BSFC within its regulated area compared with reliability regulated law. At altitude of 4.5 km, the range of economic regulated law was narrower than that at altitude of 0 m. In addition, at medium and high loads, the BSFC was higher than that at altitude of 0 m; however, at low load, the BSFC was lower than that at altitude of 0 m.

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趙長祿,李長江,韓愷,夏萌.不同海拔下柴油機可調(diào)二級增壓系統(tǒng)的經(jīng)濟(jì)性調(diào)節(jié)方法[J].農(nóng)業(yè)機械學(xué)報,2016,47(2):369-376. Zhao Changlu, Li Changjiang, Han Kai, Xia Meng. Regulated Method Based on Fuel Economy for Regulated Two-stage Turbocharging System of Diesel at Different Altitudes[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(2):369-376.

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  • 收稿日期:2015-08-11
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  • 在線發(fā)布日期: 2016-02-25
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