基于压缩空气的车辆制动能量回收与内燃机循环工况优化

项目名称： 基于压缩空气的车辆制动能量回收与内燃机循环工况优化

项目编号： No.51476143

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 俞小莉

作者单位： 浙江大学

项目金额： 75万元

中文摘要： 项目从降低内燃机油耗和排放角度出发，创新性地提出了将车辆制动能量回收利用与内燃机工作循环优化相结合的学术思想，以城市道路车辆内燃机为主要研究对象，通过数值仿真分析与模拟试验验证手段相结合的方法，深入研究基于压缩空气的车辆制动能量回收方法和内燃机气动起动、增压补气等利用方法，重点探索瞬变过程机械动能与压缩空气势能之间的双向高效转化机制及其能量动态管理策略，解明车辆制动能量回收利用与内燃机低效高污染工况改善之间的协同机制，提出新的压缩空气-燃油复合热力循环设计理论，为改善内燃机车辆频繁起-停工况的燃油消耗和污染物排放提供新的技术指引。

中文关键词： 内燃机；能量回收利用；压缩空气；多场耦合；复合循环优化

英文摘要： Aiming to improve the fuel consumption and emissions of internal combustion engine(ICE), we proposed a novel concept of combining the braking energy recovery with ICE cycle optimization based on compressed air. Focusing on the ICE of urban cycle vehicle, both numerical simulation and bench test are adopted. Vehicle braking energy recovery with engine regenerative braking, compressed air starting and supercharging are explored systematically and thoroughly. The key scientific points to be settled are the high efficiency energy conversion mechanism and operating strategy between mechanical energy and compressed air energy. By investigating the optimal mechanism of coordinating braking energy recovery and ICE improvement in its low efficiency and high emission working conditions, we summarized the theoretical foundation of the combined pneumatic-fuel cycle based on thermodynamic modeling and bench test verification. As a particular application example, a systematic approach to apply this novel thermodynamic cycle is proposed and validated, to improve fuel efficiency and reduce emissions of ICE in typical urban driving cycles with frequent stops and starts.

英文关键词： Internal combustion engine;Energy recovery;Compressed air;Multi-field coupling;Combined cycle optimization