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The influence of engine gyroscopic moments on vehicle transient handling
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering ( IF 1.5 ) Pub Date : 2021-03-10 , DOI: 10.1177/0954407021996893
Ali Shahabi 1 , Amir Hossein Kazemian 1 , Saeid Farahat 1 , Faramarz Sarhaddi 1
Affiliation  

This study presents the dynamics of a 15-DOF model of the vehicle by performing simulations to investigate the vehicle handling dynamics in J-turn maneuver. Using Newton’s equations of motion, the equations of motion for the sprung and unsprung masses are all written in the vehicle coordinate system and the tire is modeled with the Pacejka 89 model. Since the engine crankshaft has a rotation relative to the vehicle coordinate system, in order to investigate the effect of the engine gyroscopic moments on the vehicle handling dynamics, the effect of the crankshaft rotation on the torque vector of external forces is considered. The direction of crankshaft rotation can change the direction of engine rotation in the direction of the wheels rotation or in the opposite direction of their rotation, which causes some changes in the gyroscopic torque vector of the engine. Due to the rotation speed of the crankshaft and its moment of inertia, the gyroscopic moments which resulted from the angular momentum of the engine crankshaft are considerable. These gyroscopic moments are added to the torque equation of external forces in the vehicle coordinate system and affect the vehicle handling dynamics. By using the numerical method of Newmark, vehicle’s dynamic behavior is investigated and the validation of its dynamic behavior is done by ADAMS/Car software. This study shows that in transverse engine, if the direction of engine rotation is in the opposite direction of the wheels, the vehicle handling dynamics is improved.



中文翻译:

发动机陀螺力矩对车辆瞬态操纵的影响

这项研究通过执行仿真研究J形弯道机动中的车辆操纵动力学特性,提出了车辆15自由度模型的动力学特性。使用牛顿运动方程,将悬挂和未悬挂的质量的运动方程都写入车辆坐标系,并使用Pacejka 89模型对轮胎进行建模​​。因为发动机曲轴相对于车辆坐标系具有旋转,所以为了研究发动机陀螺力矩对车辆操纵动力学的影响,考虑了曲轴旋转对外力转矩矢量的影响。曲轴旋转方向可以沿车轮旋转方向或相反方向改变发动机旋转方向,这会导致发动机的陀螺转矩矢量发生一些变化。由于曲轴的转速及其惯性矩,由发动机曲轴的角动量引起的陀螺力矩相当大。这些陀螺力矩被添加到车辆坐标系中外力的扭矩方程中,并影响车辆操纵动力学。利用Newmark的数值方法,研究了车辆的动态行为,并通过ADAMS / Car软件对车辆的动态行为进行了验证。该研究表明,在横向发动机中,如果发动机旋转方向与车轮方向相反,则车辆操纵动力学将得到改善。由发动机曲轴的角动量引起的陀螺力矩很大。这些陀螺力矩被添加到车辆坐标系中外力的扭矩方程中,并影响车辆操纵动力学。利用Newmark的数值方法,研究了车辆的动态行为,并通过ADAMS / Car软件对车辆的动态行为进行了验证。该研究表明,在横向发动机中,如果发动机旋转方向与车轮方向相反,则车辆操纵动力学将得到改善。由发动机曲轴的角动量引起的陀螺力矩很大。这些陀螺力矩被添加到车辆坐标系中外力的扭矩方程中,并影响车辆操纵动力学。利用Newmark的数值方法,研究了车辆的动态行为,并通过ADAMS / Car软件对车辆的动态行为进行了验证。该研究表明,在横向发动机中,如果发动机旋转方向与车轮方向相反,则车辆操纵动力学将得到改善。研究车辆的动态行为,并通过ADAMS / Car软件对车辆的动态行为进行验证。该研究表明,在横向发动机中,如果发动机旋转方向与车轮方向相反,则车辆操纵动力学将得到改善。研究车辆的动态行为,并通过ADAMS / Car软件对车辆的动态行为进行验证。该研究表明,在横向发动机中,如果发动机旋转方向与车轮方向相反,则车辆操纵动力学将得到改善。

更新日期:2021-03-10
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