随着国内机械式自动变速箱(Mechanical Automatic Transmission,AMT)的市场保有量越来越大,其中的核心变速箱控制单元(Transmission Control Unit,TCU)的地位日益凸显,其涉及到传感器、电路、密封、控制等多方面的集成。对于密封件而言...随着国内机械式自动变速箱(Mechanical Automatic Transmission,AMT)的市场保有量越来越大,其中的核心变速箱控制单元(Transmission Control Unit,TCU)的地位日益凸显,其涉及到传感器、电路、密封、控制等多方面的集成。对于密封件而言,区别于传统骨架仅起支撑作用的设计,还需避免骨架对传感器等零部件的影响。介绍了密封件中骨架对于传感器的信号感应影响的研究,为后续类似应用中密封件设计提供了指导意义。展开更多
For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Ai...For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Aiming at four different shift types,the ideal characteristics of shift clutch and engine control were set up.By using torque estimation method,PI slip control algorithm and engine coordinated control principle,the control model and transmission controller were well developed for three shift phases which included rapid-fill phase,torque phase and inertia phase.The testing environment on the rig and prototype vehicle level was built and the testing results obtained in ultimate condition could verify the accuracy and feasibility of this shift control strategy.The peak jerk during shift process was controlled within ±2 g/s where the smooth gearshift was obtained.The development proposal and algorithm have a high value for engineering application.展开更多
文摘随着国内机械式自动变速箱(Mechanical Automatic Transmission,AMT)的市场保有量越来越大,其中的核心变速箱控制单元(Transmission Control Unit,TCU)的地位日益凸显,其涉及到传感器、电路、密封、控制等多方面的集成。对于密封件而言,区别于传统骨架仅起支撑作用的设计,还需避免骨架对传感器等零部件的影响。介绍了密封件中骨架对于传感器的信号感应影响的研究,为后续类似应用中密封件设计提供了指导意义。
基金Project(51105017) supported by the National Natural Science Foundation of ChinaProject(2011BAG09B00) supported by the National Science and Technology Support Program of ChinaProject(2010DFB80020) supported by the Technology Major Project of the Ministry of Science and Technology of China
文摘For the purpose of engineering development for a new 8-step speed automatic transmission,a simplified dynamic model for this gearbox was established and key parameters which affected the shift quality were analyzed.Aiming at four different shift types,the ideal characteristics of shift clutch and engine control were set up.By using torque estimation method,PI slip control algorithm and engine coordinated control principle,the control model and transmission controller were well developed for three shift phases which included rapid-fill phase,torque phase and inertia phase.The testing environment on the rig and prototype vehicle level was built and the testing results obtained in ultimate condition could verify the accuracy and feasibility of this shift control strategy.The peak jerk during shift process was controlled within ±2 g/s where the smooth gearshift was obtained.The development proposal and algorithm have a high value for engineering application.
