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    • 6. 发明公开
    • METHOD AND ARRANGEMENT FOR TIRE TO ROAD FRICTION ESTIMATION
    • VERFAHREN UND ANORDNUNG ZURREIBWERTSCHÄTZUNGZWISCHEN REIFEN UND FAHRBAHN
    • EP3106360A1
    • 2016-12-21
    • EP15172369.9
    • 2015-06-16
    • Volvo Car Corporation
    • Jonasson, MatsGustafsson, TonyAlbinsson, AntonBruzelius, Fredrik
    • B60T8/172B60W40/068
    • B60W40/068B60R16/023B60T8/172B60T2210/12B60W2520/28
    • The present disclosure relates to a method and arrangement for estimating a friction coefficient (µ i ) between tires of a wheeled two-axis two-track road vehicle (1) and the ground. If the longitudinal velocity v x of the vehicle (1) is above a first threshold v xthres and the wheel angle δ f and/or the yaw rate Ω z is below a second threshold δ thres /Ω zthres , a positive torque is applied to both wheels on a first axle and an and opposite, negative torque, to both wheels on a second axle while following driver requested longitudinal vehicle (1) acceleration ( a x ). Wheel speeds ω i are measured and tire forces ( f i ) estimated. The friction coefficient (µ i ) between the tires and the ground are estimated from the measured wheel speeds ω i and the estimated tire forces ( f i ). The estimated friction coefficient (µ i ) is made available to other vehicle (1) systems.
    • 本公开涉及一种用于估计轮式双轴双轨道路车辆(1)的轮胎与地面之间的摩擦系数(μi)的方法和装置。 如果车辆(1)的纵向速度vx高于第一阈值v xthres,并且车轮角度f和/或横摆角速度z z低于第二阈值thres / zthres,则将正转矩施加到两者 在第一轴上的轮子和相反的负转矩到第二轴上的两个车轮,而跟随驾驶员要求纵向车辆(1)加速度(ax)。 估计车轮速度和我的轮胎力(f i)。 轮胎和地面之间的摩擦系数(μi)根据测量的车轮速度Éi和估计的轮胎力(f i)估算。 估计摩擦系数(μi)可用于其他车辆(1)系统。
    • 8. 发明公开
    • METHOD AND SYSTEM FOR DETERMINING FRICTION BETWEEN THE GROUND AND A TIRE OF A VEHICLE
    • 用于确定车辆的地面和轮胎之间摩擦的方法和系统
    • EP3309024A1
    • 2018-04-18
    • EP16193753.7
    • 2016-10-13
    • Volvo Car Corporation
    • Gustafsson, TonyJonasson, Mats
    • B60T8/172B60W40/068
    • B60T8/172B60T8/175B60T2210/12B60T2240/00B60T2250/00B60T2250/042B60W40/068
    • There is provided a method for estimating friction between a tire of a vehicle and a road surface, the method comprising acquiring, a front wheel axle torque, a rear wheel axle torque, a vehicle longitudinal acceleration, a vehicle pitch rate and wheel rotational velocities. The method further comprises determining a front wheel normal force and a rear wheel normal force, based on a center of gravity of the vehicle and the longitudinal acceleration; determining a longitudinal tire stiffness, jointly determining a vehicle longitudinal velocity, based on the wheel rotational velocities and vehicle longitudinal acceleration, and a vehicle pitch angle relative to the horizontal plane based on the vehicle pitch rate; and determining a friction coefficient between tires and ground based on the front and rear wheel axle torque, the front wheel normal force and the joint estimation of pitch angle and vehicle longitudinal velocity. There is also provided a system for performing the described method.
    • 提供了一种用于估计车辆的轮胎和路面之间的摩擦的方法,所述方法包括获取前轮轴扭矩,后​​轮轴扭矩,车辆纵向加速度,车辆俯仰速率和车轮旋转速度。 该方法还包括基于车辆的重心和纵向加速度确定前轮法向力和后轮法向力; 确定纵向轮胎刚度,基于车轮旋转速度和车辆纵向加速度,以及基于车辆俯仰率相对于水平面的车辆俯仰角共同确定车辆纵向速度; 以及基于前后轮轴扭矩,前轮法向力以及俯仰角和车辆纵向速度的联合估计来确定轮胎与地面之间的摩擦系数。 还提供了用于执行所述方法的系统。
    • 10. 发明公开
    • SECONDARY STEERING SYSTEM UNIT, SECONDARY STEERING SYSTEM, VEHICLE AND A METHOD FOR SECONDARY STEERING
    • 二级转向装置辅助转向系统,二次转向车辆和方法
    • EP3090907A1
    • 2016-11-09
    • EP15166329.1
    • 2015-05-05
    • Volvo Car Corporation
    • Jonasson, MatsThor, Mikael
    • B60T8/1755B62D11/08
    • A vehicle (50), a method (100), a secondary steering system unit (40) and a secondary steering system (36) are provided. The secondary steering system unit (40) comprises: a fault determination arrangement (41), arranged to determine the presence of a fault in the main steering system and a path controller (42), arranged to generate an upcoming path (P) for the host vehicle (50). The secondary steering system unit (40) is arranged to steer the host vehicle (50) along the path (P) by differential braking upon determination that a fault is present in the main steering system and is arranged to steer the differential braking in dependence of both a yaw torque (T) acting on the host vehicle (50) as a result of the differential braking and a steering angle resulting from a generated alignment torque on a braked steerable wheel (10) caused by the associated wheel suspension scrub radius (27).
    • 本发明提供一种车辆(50),一种方法(100),辅转向系统单元(40)和次级转向系统(36)。 二次转向系统单元(40)包括:布置成确定的矿井中的故障确定装置(41)中的故障的主转向系统的存在和设置在为即将到来的路径(P),以产生路径控制器(42) 主车辆(50)。 二次转向系统单元(40)被布置成通过在确定差动制动操纵沿路径(P)的主车辆(50)没有故障存在于主转向系统和被布置为操纵所述差动制动中的依赖 二者的横摆力矩(T)作用于主车辆(50),作为差动制动的结果和转向角从由所述相关联的车轮悬架擦洗半径引起一个制动转向轮(10)所产生的校准扭矩所得的(27 )。