CAJ | 학술논문

针对现有无级变速传动系统效率优化算法的不完整性,以整体效率最优为目标设计最佳工况点求解算法,制定基于功率需求的传动系统整体优化控制策略,将满足功率需求的最高效率点作为基本控制目标,以实现最佳经济性;当功率需求超出传动系统功率范围时,将当前车速下的最大输出功率点作为控制目标,以实现最佳动力性;求解液力变矩器理想状态切换线,制定实际切换控制线。试验验证和对比分析结果表明,采用优化控制策略降低油耗近3%,起步加速时的变矩器闭锁时间缩短11%,最大输出功率提高2.3%。
침대현유무급변속전동계통효솔우화산법적불완정성,이정체효솔최우위목표설계최가공황점구해산법,제정기우공솔수구적전동계통정체우화공제책략,장만족공솔수구적최고효솔점작위기본공제목표,이실현최가경제성;당공솔수구초출전동계통공솔범위시,장당전차속하적최대수출공솔점작위공제목표,이실현최가동력성;구해액력변구기이상상태절환선,제정실제절환공제선。시험험증화대비분석결과표명,채용우화공제책략강저유모근3%,기보가속시적변구기폐쇄시간축단11%,최대수출공솔제고2.3%。
Aimming at highest efficiency of CVT,an optimization algorithm was designed by considering the efficiency of engine and the main dissipation component of CVT.Duel-state hydraulic torque converter（TC） was also included in the algorithm.Control strategy based on power demands was designed in order to realize higher efficiency of the whole system.The highest efficiency operating conditions which satisfied the power demands were set to be the control objective.As a result, the best economical efficiency is available.While the power demands exceed the maximum output power under the current vehicle speed,the maximum output power conditions were set to be the control objective,and then the best dynamic performance is available. TC ideal control line was calculated,based on which a practice operating line was designed.The results of simulation show that by adopting the designed optimal strategy,fuel consumption decreases nearly 3%,TC lock time reduces 11% in start-acceleration,and the maximum output power increases 2.3%.