公开(公告)号：US5200008A

公开(公告)日：1993-04-06

申请号：US652412

申请日：1991-02-07

申请人： Gary D. Enterline ,  Michel A. de Reynal

发明人： Gary D. Enterline ,  Michel A. de Reynal

IPC分类号： B60C11/01 ,  B60C11/04 ,  B60C11/11

CPC分类号： B60C11/11 ,  B60C11/01 ,  B60C11/0311 ,  Y10S152/902 ,  Y10S152/904

摘要： The tread design of a radial pneumatic tire for ground vehicles is characterized by lateral or transverse grooves on the shoulder ribs having an incline from the normal to the contact surface in one direction and the lateral or transverse grooves in the center of the tread width being inclined in the reverse direction. Improved wear rates with uniform wear is obtained on a drive axle with proper tire rotation. A reversed direction of rotation on the non-drive axle results in more even wear with potentially less vibration and noise.Lateral grooves are inclined form approximately 20 to 30 degrees and leading edges of some tread blocks have acute angles while other tread blocks have trailing edges with acute angles. The resultant distribution of longitudinal tangential stress on tread blocks is improved.

公开(公告)号：US5944082A

公开(公告)日：1999-08-31

申请号：US667345

申请日：1996-06-21

申请人： Ronald Hobart Thompson ,  Michel A. de Reynal

发明人： Ronald Hobart Thompson ,  Michel A. de Reynal

IPC分类号： B60C11/03 ,  B60C11/04 ,  B60C11/13 ,  B60C103/00

CPC分类号： B60C11/0309 ,  B60C11/03 ,  B60C11/0302 ,  B60C11/13

摘要： The tread of a rib type tire is modified to provide draft angles in lateral grooves of selected ribs to compensate the tire's residual aligning torque (RAT). This allows the vehicle to have straight ahead motion with no steering pull. The draft angles are achieved by inclining the radial centerline of the lateral grooves to be sloped forward on one side of the midcircumferential plane and sloped backward on the other side of the midcircumferential plane. The centerline draft angle results in tread blocks sloped forward and backward during forward motion of the vehicle. The sloping tread blocks produces an effective rolling radius change on selected ribs of the tread pattern. Effective rolling radius of selected ribs is a concept introduced to explain the physical relationships that exist in the contact patch of the tire with the ground surface. The resulting contact change introduces longitudinal tangential stress changes that induce a torque to compensate for the inherent residual aligning torque due to the unmodified tire's construction and tread pattern.

摘要翻译： 肋型轮胎的胎面被修改以在选定的肋的横向槽中提供拔模以补偿轮胎的残余对准扭矩（RAT）。 这允许车辆在没有转向拉力的情况下具有直的前进运动。 通过使横向槽的径向中心线倾斜向中间圆周面的一侧倾斜并在中间圆周面的另一侧向后倾斜来实现拔模斜度。 中心线牵伸角导致在车辆向前运动期间向前和向后倾斜的胎面踏板。 倾斜的胎面花纹块在胎面花纹的所选肋上产生有效的滚动半径变化。 所选肋骨的有效滚动半径是介绍轮胎与地面接触片中存在的物理关系的概念。 所产生的接触变化引入纵向切向应力变化，其引起扭矩以补偿由于未修改的轮胎的结构和胎面花纹造成的固有残余对准扭矩。