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- 2016
排气再循环与燃烧边界条件耦合对增压汽油机有效热效率的影响
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Abstract:
在一台小型增压进气道喷射汽油机上开展了排气再循环技术与关键燃烧边界协同性对发动机燃油经济性和燃烧循环波动影响的试验研究。结果表明:增压技术、排气再循环技术和压缩比协同控制较为重要,协同性明显影响燃油经济性和燃烧循环波动;转速为2 000 r/min、负荷为0.2～0.4 MPa时排气再循环对燃油经济性改善不明显;转速为1 500～2 500 r/min、负荷为0.6～1.0 MPa时排气再循环率对汽油机燃油经济性改善明显,燃油消耗率降幅为2％～7％;考虑高能点火系统本身能耗,转速为2 000 r/min、负荷为0.2～1.0 MPa时多重火花电容放电的高能点火系统对燃油经济性改善不明显,但循环波动得到了改善;对于上市整车匹配1.6 L进气道喷射汽油机,采取集增压技术、排气再循环技术、高滚流进气道和1？？3 L排量措施后的进气道喷射汽油机的整车循环油耗降低了8？？86％,整车具备达到相应油耗水平的潜力。
The influence of exhaust gas recirculation coupled with various combustion boundary conditions on brake specific fuel consumption and cyclic variations of indicated mean effective pressure is investigated in a 1？？3 L turbocharged port fuel injection gasoline engine. Results show that it is important to make supercharging technology, exhaust gas recirculation and high compression ratio control harmoniously, which favors to both brake specific fuel consumption and cyclic variations. Introducing exhaust gas recirculation into gasoline engine can improve the brake specific fuel consumption under medium and high loads (including wide open throttle operation) at 1 500？？2 500 r/min, however, it has little improvement on brake specific fuel consumption under the loads of 0.2？？0.6 MPa BMEP (brake mean effective pressure) and engine speed of 2 000 r/min. Considering the high energy consumption of the capacitor discharge high？？energy ignition system, introducing exhaust gas recirculation into gasoline engine does not effectively improve brake specific fuel consumption but improve cyclic variations under the loads of 0.2？？1.0 MPa BMEP and engine speed of at 2 000 r/min. Fuel consumption per 100 km for the vehicle equipped with the turbocharged gasoline engine coupled with supercharging, exhaust gas recirculation, high tumble inlet ports and 1？？3 L displacement is estimated 8？？86％ under NEDC (new European driving cycle) condition, which is lower than that equipped with 1？？6 L displacement naturally aspirated engine
| [1] | SONG Jin’ou, YAO Chunde, YAO Guangtao, et al. Study on heat release of gasoline engine with tumble generating stratified？？EGR technique ［J］. Transactions of CSICE, 2006, 24(2): 157？？161. |
| [2] | ［2］马志豪, 康宁, 高定伟, 等. 过量空气系数与废气再循环率耦合对汽油机性能的影响 ［J］. 农业工程学报, 2014, 30(1): 34？？39. |
| [3] | MA Zhihao, KANG Ning, GAO Dingwei, et al. Effect of exhaust gas recirculation rate with different excess air coefficients on performance of gasoline engine ［J］. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(1): 34？？39. |
| [4] | ［3］TAYLOR J, GURNEY D, FREELAND P, et al. Intake manifold length effects on turbocharged gasoline downsizing engine performance and fuel economy, SAE 2012？？01？？0714 ［R］. Washington, DC, USA: SAE, 2012. |
| [5] | ［4］TAYLOR J, FRASER N, DINGELSTADT R, et al. Benefits of late inlet valve timing strategies afforded through the use of intake cam in cam applied to a gasoline turbocharged downsized engine, SAE 2011？？01？？0360 ［R］. Washington, DC, USA: SAE, 2011. |
| [6] | ［5］张小矛, 高卫民, 辛军, 等. 进气道对缸内直喷增压汽油机性能的影响 ［J］. 内燃机学报, 2011, 29(4): 300？？306. |
| [7] | ZHANG Xiaomao, GAO Weimin, XIN Jun, et al. Intake port effect on the performance of a turbo charged gasoline direct injection engine ［J］. Transactions of CSICE, 2011, 29(4): 300？？306. |
| [8] | ［6］宋金瓯, 姚春德, 姚广涛, 等. 汽油机废气滚流分层技术燃烧放热规律的研究 ［J］. 内燃机学报, 2006, 24(2): 157？？161. |
| [9] | ［7］AMANN M, ALGER T, MEHTA D. The effect of EGR on low？？speed pre？？ignition in boosted SI Engines, SAE 2011？？01？？0339 ［R］. Washington, DC, USA: SAE, 2011. |
| [10] | ［8］BOURHIS G, CHAUVIN J, GAUTROT X, et al. LP EGR and IGR compromise on a GDI engine at middle load, SAE 2013？？01？？0256 ［R］. Washington, DC, USA: SAE, 2013. |
| [11] | ［9］赵金星. 基于神经网络和遗传算法的Atkinson循环发动机全负荷范围性能优化研究 ［D］. 上海: 上海交通大学, 2013: 27？？29. |
| [12] | ［1］LECOINTE B, MONNIER G. Downsizing a gasoline engine using turbocharging with direct injection, SAE 2003？？01？？0542 ［R］. Washington, DC, USA: SAE, 2003. |
