Assessment of a synergistic control of intake and exhaust VVT for airflow exchange,combustion, and emissions in a DI hydrogen engine |
| |
| Affiliation: | 1. College of Energy and Power Engineering, Beijing Lab of New Energy Vehicles and Key Lab of Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, PR China;2. Beijing Automobile Research Institute Company Limited, Beijing, 101300, PR China;1. Shenyang University of Chemical Technology, Shenyang 110142, China;2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;1. National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Gongye Road 523, Gulou District, Fuzhou, Fujian 350002, PR China;2. Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, PR China;1. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China;2. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. SAIC General Motors Corporation Limited, Shanghai 200120, China;1. New Energy Materials Research Center, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, People''s Republic of China;2. School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang, 441053, People''s Republic of China;3. Institute of Advanced Semiconductors & Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, Zhejiang 311200, People''s Republic of China;4. College of Management & Technology, Zhejiang Technical Institute of Economics, Hangzhou, 310018, China;1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, People''s Republic of China;2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, People''s Republic of China;3. School of Science, Lanzhou University of Technology, Lanzhou 730050, People''s Republic of China |
| |
| Abstract: | Variable valve timing (VVT) and Miller cycle are advanced technologies employed to optimize engine performance by improving airflow exchange, which are seldom investigated based on the direct-injection (DI) hydrogen engine. The objective of this study is to assess the effects of intake valve closing (IVC) and exhaust valve opening (EVO) timing on the gas exchange performance, combustion, and emissions of a DI hydrogen engine, after which a synergistic control strategy of IVC and EVO timing is proposed. This work is conducted under wide-open throttle and 1500 rpm. The results indicate that the synergistic control of IVC and EVO timing can increase volumetric efficiency by more than 40%, enhance gas exchange performance, shorten combustion duration, and reduce cyclic variation, resulting in approximately 43.15% brake thermal efficiency. Furthermore, brake mean effective pressure can be increased by more than 60% and NO emissions are controlled to less than 20 ppm by optimizing valve timings. |
| |
| Keywords: | VVT Miller cycle DI hydrogen engine Gas exchange performance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
