汽车整车电子发展战略

整车企业将汽车功能分为汽车安全、动力、油耗、舒适度及可靠性等十六个指标，其核心工作即围绕上述指标，令用户实现最大回报。当前，汽车电子产品对整车性能影响极大，如何充分利用汽车电子产品为终端用户更好的服务，是整车企业的目标之一。     

恒功率变量泵的动态特性仿真研究

恒功率变量泵能保证工程机械工作过程中充分吸收发动机的输出功率。为深入研究变量泵的变量动态特性,分析并建立了恒功率变量泵的关键部件数学模型,并用液压仿真软件AMESIM构建了仿真模型。将实测压力数据作为模型的负载输入,反向验证了所建模型的正确性,分析了变量泵进入恒功率调节区域后主泵压力、变量弹簧预紧力、单双测量弹簧、极限载荷控制压力等参数变化对变量泵动态特性的影响。仿真结果表明,该模型能够满足变量泵的动态特性分析要求。     

陶瓷压电式石墨烯除冰系统设计方法研究

冬季降雪后,由于桥梁结构原因,大量桥面结冰引起交通事故,而目前市面上普遍应用的人工清理、机械清理以及撒盐清理等方式存在诸多弊端.为了解决长期存在的低温季节桥面结冰的除冰困难状况,对各种常见传统除冰方式的弊端进行了分析,并提出了一种将积蓄车辆通过减速带时压力所产生的能量转化为热能的设计思路,应用压电性能优异PZT压电陶瓷以及发热性能高的石墨烯薄膜设计了一种除冰系统,并通过能量模型计算证明其可行性.该除冰系统设计方法为桥面除冰问题的解决提供了全新思路.     

Estimating the clutch transmitting torque during HEV mode-switch based on the Kalman filter

A power train dynamics model of a coaxial parallel hybrid electric vehicle (HEV) was built for different clutch operating states. With the state vector constituted by the motor rotation speed and the clutch transmitting torque at two successive time steps, a discrete state space model for estimating the clutch transmitting torque was built, and the Kalman filtering algorithm was used to estimate the clutch transmitting torque. The Matlab/Simulink was employed to simulate the clutch transmitting torque for two mode-switch processes. Estimation errors were analyzed through comparing the estimated and simulated values of the clutch torque. Impact of the noise covariance and the sample time on clutch torque estimation errors were explored. The results show that the developed estimation method can be used to estimate the clutch transmitting torque for HEV with good accuracy. The results are useful for torque direct control of automatic diaphragm clutches.