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混氫改善汽油機(jī)低怠速性能研究
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國(guó)家自然科學(xué)基金資助項(xiàng)目（50976005）


Effect of Hydrogen Addition on Improving Low Idle Speed Performance of SI Engine
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    摘要:

    在一臺(tái)加裝了電控氫氣噴射系統(tǒng)的四缸汽油機(jī)上，試驗(yàn)研究了混氫對(duì)發(fā)動(dòng)機(jī)低怠速性能的影響。在怠速轉(zhuǎn)速不變、維持進(jìn)氣混合氣處于當(dāng)量比的條件下，在0~6%的范圍內(nèi)逐漸增加氫氣在總進(jìn)氣中的體積分?jǐn)?shù)，測(cè)試了發(fā)動(dòng)機(jī)轉(zhuǎn)速分別為800、700、600r/min時(shí)的低怠速性能。試驗(yàn)結(jié)果表明，純汽油機(jī)怠速為800r/min時(shí)，發(fā)動(dòng)機(jī)穩(wěn)定運(yùn)行的燃料能量流量Ef為30.8MJ/h，而當(dāng)混氫分?jǐn)?shù)增加至6.0%、怠速轉(zhuǎn)速降至600r/min時(shí)，Ef降低至18.6MJ/h；隨進(jìn)氣混氫體積分?jǐn)?shù)的提高，發(fā)動(dòng)機(jī)低怠速時(shí)的燃燒持續(xù)期縮短，HC、CO及NOx排放量降低，循環(huán)變動(dòng)也減小?？梢?jiàn)，進(jìn)氣摻氫可有效改善發(fā)動(dòng)機(jī)的低怠速性能。

    Abstract:

    An experiment was carried out on a four-cylinder spark-ignited (SI) gasoline engine to investigate the effect of hydrogen addition on the engine performance at low idle speed conditions. The engine was run at three idle speeds of 800r/min, 700r/min and 600r/min. At the specified idle speed and stoichiometric conditions, the hydrogen volumetric fraction in the total intake was gradually increased from 0 to about 6%. The experimental results showed that the engine fuel energy flow rate was reduced from 30.8MJ/h at the idle speed of 800r/min and a hydrogen volumetric fraction in the intake of 0 to 18.6MJ/h at the idle speed of 600r/min and a hydrogen volumetric fraction in the intake of 6.0%. For different idle speeds, the engine combustion duration was shortened, cyclic variation was eased and HC, CO and NOx emissions were decreased with the increase of hydrogen volumetric fraction in the intake. All in all, the addition of hydrogen was effective for enhancing the engine performance at low idle speed conditions.

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汪碩峰,紀(jì)常偉,焦磊,張旻玥,張擘,黃霄楠.混氫改善汽油機(jī)低怠速性能研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(5):22-26. Wang Shuofeng, Ji Changwe, Jiao Le, Zhang Minyue, Zhang Bo, Huang Xiaonan. Effect of Hydrogen Addition on Improving Low Idle Speed Performance of SI Engine[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(5):22-26.

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  • 在線發(fā)布日期: 2012-06-07
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