Development of direct fuel injection technology based on piezoceramic actuation

基于压电陶瓷驱动的燃油直喷技术的发展

• 批准号: 381047-2009
• 负责人: BenMrad, Ridha
• 金额: $ 7.87万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=484880
• 关键词: Development; direct; fuel; injection; technology

Global demand for better fuel economy, low engine emissions, and better vehicle response speed require engine manufacturers to continue to seek better combustion systems. In the past decade, the common rail direct fuel injection technology in engines which features a high-pressure fuel rail and electric controls of individual valves led to a significant improvement in emissions, fuel consumption and power density. The key constituent of the common rail system is the fuel injector. A conventional direct fuel injector uses a solenoid coil that drives a valve to move the injector needle through a hydraulic circuit. The solenoid actuator cannot meet stringent future emission requirements (US 2012, Euro 6). Piezoelectric fuel injectors are gradually replacing the solenoid injectors and typically consist of a multi-layer piezoelectric stack actuator acting on a nozzle with a speed 4~5 times faster than its solenoid counterpart. Current piezoelectric engine fuel injectors use a

全球对更好的燃油经济性、低发动机排放和更好的车辆响应速度的需求要求发动机制造商继续寻求更好的燃烧系统。在过去的十年中，发动机中的共轨燃油直喷技术以高压燃油轨和单个阀门的电控为特色，显着改善了排放、油耗和功率密度。共轨系统的关键组成部分是喷油器。传统的直接燃油喷射器使用螺线管线圈驱动阀门以通过液压回路移动喷射器针。电磁执行器无法满足严格的未来排放要求（美国 2012 年，欧洲 6）。压电燃油喷射器正在逐渐取代螺线管喷射器，通常由作用在喷嘴上的多层压电堆栈致动器组成，其速度比螺线管喷射器快 4~5 倍。目前的压电发动机燃油喷射器使用