Development of a turbocharged direct-injection hydrogen engine to achieve clean, efficient, and high-power performance

被引:51
作者
Bao, Ling-zhi [1 ]
Sun, Bai-gang [1 ]
Luo, Qing-he [1 ]
Li, Jin-cheng [2 ]
Qian, Ding-chao [2 ]
Ma, He-yang [2 ]
Guo, Ying-jun [2 ]
机构
[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
[2] China First Auto Works Corp Ltd, Gen Res & Dev Inst, Changchun 130013, Peoples R China
关键词
Direct-injection hydrogen engine; Turbocharged; High thermal efficiency; NOx emissions control; COMBUSTION CHARACTERISTICS; IGNITION ENGINE; NOX EMISSION; FUEL;
D O I
10.1016/j.fuel.2022.124713
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Hydrogen, as clean and renewable energy, is an ideal fuel for internal combustion engines. The direct-injection (DI) hydrogen engine can offer large power with low cost and rely less on hydrogen purity. In this study, a 2.0L DI turbocharged hydrogen engine is implemented to achieve clean, efficient, and high-power performance. Peak power of 120 kW @ 4400 rpm and a maximum torque of 340 N center dot m @ 2000 rpm can be achieved with the matched turbocharger. Appropriate retarded injection can suppress abnormal combustion and broaden the dynamic boundaries. A maximum brake thermal efficiency (BTE) of 42.6% is obtained with the slightly lean excess air coefficient (.) of 1.91 @ 2000 rpm and 40.4% BTE with the. of 2.47 @ 3000 rpm. The high conversion efficiency of NOx emissions of over 99.5% is reached at low speeds (below 2000 rpm) and drops to 90% at 4400 rpm with the use of the NH3-SCR after-treatment system. The NOx emissions of approximately two-thirds of the whole working conditions can be reduced below 20 ppm. The optimized DI hydrogen engine can achieve large power (Brake mean effective pressure = 17 bar), high efficiency (Brake thermal efficiency = 42.1%), and near-zero emissions (NOx < 20 ppm) simultaneously.
引用
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页数:8
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