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低溫環(huán)境下ISG技術(shù)柴油機(jī)起動性能分析
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Starting System of ISG Diesel Engine under Low-temperature
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    摘要:

    分析了低溫環(huán)境下ISG技術(shù)柴油機(jī)起動性能的主要影響因素,,結(jié)合柴油機(jī)的起動阻力矩,、最低起動轉(zhuǎn)速和ISG電機(jī)工作特性等因素,確定了ISG電機(jī)的最大輸出功率,;考察了極板結(jié)構(gòu),、電解液溫度對蓄電池容量的影響,,研究了起動阻力矩與ISG電機(jī)功率、蓄電池容量之間的匹配關(guān)系,,得到了起動阻力矩隨環(huán)境溫度,、起動轉(zhuǎn)速的變化規(guī)律。試驗(yàn)表明:減少板極厚度、增加板極高度,,適當(dāng)提高電解液密度,,可以提高蓄電池容量;在相同的環(huán)境溫度下,,起動阻力矩隨起動轉(zhuǎn)速的提高而增大,,當(dāng)轉(zhuǎn)速高于200r/min時(shí),轉(zhuǎn)速每提高50r/min,,起動阻力矩增加4~11N?m,;當(dāng)環(huán)境溫度低于0℃,轉(zhuǎn)速不變時(shí),,環(huán)境溫度每降低5℃,,起動阻力矩增加約3~5N?m;-25℃下ISG技術(shù)柴油機(jī)的起動著火轉(zhuǎn)速可達(dá)350r/min以上,,起動時(shí)間縮短,,且起動過程中轉(zhuǎn)速過渡較為平滑,有利于提高起動工況下的動力性,、改善排放性,。

    Abstract:

    The main influencing factors of starting system under low temperature were analyzed, while maximum output power of the ISG motor was determined. According to starting resistance torque, minimum start-up speed, electrical operating characteristics, electric transmission coefficient and thermal effects, the influence of plate structure on battery capacity was also reviewed. The match relationship among starting resistance torque, ISG motor power and storage battery capacitance was summarized, and the changes of starting resistance torque along with ambient temperature and starting speed has been measured. The experiment result shows that as far as the environment temperature decreases by 5℃, starting resistance torque increases by 3~5N?m at above 200r/min; keeping speed constant, starting resistance torque increases by 4~11N?m with every enhanced 50r/min. The first fire speed of ISG diesel engine at -25℃ is increased, which is up to more than 350r/min .The starting time is shorter than original diesel engine, and fluctuations in speed is smaller.

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魏長河,王忠,葉飛飛,唐廷,黃成海.低溫環(huán)境下ISG技術(shù)柴油機(jī)起動性能分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(9):8-13. Starting System of ISG Diesel Engine under Low-temperature[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(9):8-13.

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