摘要
气动发动机进气门采用电控技术是提高其工作效率的有效措施之一。以获取进气门开启时刻随工况参数的变化规律为目的,针对进气门采用电控气动阀的气动发动机,建立了其工作过程理论模型,搭建了其试验台,并进行了理论模型的验证。以验证过的理论模型作为平台,对电控气动发动机工况参数、进气温度和压力对其主要控制参数——最佳进气门开启角的影响进行了仿真优化分析,获取了在各种不同工况及进气条件下,气动发动机进气门开启角的控制规律。研究结果表明:以气耗率最小为目标,随着气动发动机进气持续角和转速的增大,最佳进气时刻应提前,减小进气压力或增大进气温度,最佳进气时刻应适当延迟,但当进气持续角增大到145°CA时,进气压力对最佳进气时刻影响甚微;以动力性和经济性为目标的气动发动机最佳进气门开启角是不同的,在负荷低于80%时,应以经济性为目标,当负荷增大到80%及以上时,则应以动力性为目标控制进气门开启角。控制基础的研究为气动发动机采用电控技术提供了数据支持。
Electronic controlled intake valve is one of the efficient ways to improve the effiency of pneumatic engine （ PE ）. A PE’s function process model was built to achieve the change law of working parameters on the intake valve opening timing （IVOT） . A test bench of PE using electro-pneumatic intake valve was set up to validate the working process model. The effects of mainoperating parameters,intake air temperature and intake air presssure ---- IVOT were analyzed byusing the verified model. The control law of IVOT of PE was acquired and the results shows： the optimum IVOT should be advanced by increasing the intake duration angle and rotate sp e ed, or delayed by decreasing intake air temperature and pressure for the purpose of minimizing the air consumption rate of PE . However,the intake air pressure has a little effect on the IVOT when the intake duration angle is greater than 145 °CA. Because the optimum IVOTs for the dynamic performance and fuel economy of PE are different,the optimum IVOT for fuel economy should be used when the load of PE is less than 80 % , conversely, the optimum I V O T for dynamic performance should be used when the load is equal or greater than 80% . The study on control principle can offer data support for PE to achieve electronic control.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2017年第3期864-873,共10页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(31560344)
江西农业大学大学生创新训练项目(201410410071)
关键词
气动发动机
电控
进气门开启角
优化
可变气门
pneumatic engine
electronic controlled
intake valve opening timing
optimizing
variable valve
作者简介
通信作者：许静（1981-）,女,江西南昌人,江西农业大学副教授,博士;E-mail：xujing0085@sina.com.
