公开(公告)号：EP0231160A2

公开(公告)日：1987-08-05

申请号：EP87850021.4

申请日：1987-01-23

申请人： AB Hägglund & Söner

发明人： Olsson, Gunnar

IPC分类号： B62D11/08

CPC分类号： B62D11/08

摘要： The present invention relates to a method and an arrangement for steering a vehicle of the kind which is constructed to be steered for straight ahead movement or for turning to the left or to the right in response to activation of a steering device (6), by causing left and right traction devices (11, 21) on the vehicle to move at mutually the same speed or at mutually different speeds.
When carrying out the method according to the invention, or when using an arrangement constructed in accordance therewith, steering is effected through the activation of clutch devices (14, 24) and brake devices (13, 23) on the vehicle, by establishing pressure changes in individual hydraulic steering control pressures, in a direction dependent on the result of a comparison made between a steer control set-point value and a steer control real-value. In this regard, the steer control real-value is generated with the aid of sensors (16, 25) which detect the rotational speed of the left and right traction devices of the vehicle. According to the invention, pressure changes are primarily effected in a hydraulic steering control pressure for one clutch device, while pressure changes in the hydraulic steering control pressure for a brake device associated with the same traction device as the aforementioned one clutch device are effected in a manner such that no braking effect is established until a given total change in the hydraulic steering pressure for the brake device is found insufficient to steer the vehicle in the manner desired.

公开(公告)号：EP0231160A3

公开(公告)日：1989-07-05

申请号：EP87850021.4

申请日：1987-01-23

申请人： AB Hägglund & Söner

发明人： Olsson, Gunnar

IPC分类号： B62D11/08

CPC分类号： B62D11/08

摘要： The present invention relates to a method and an arrangement for steering a vehicle of the kind which is constructed to be steered for straight ahead movement or for turning to the left or to the right in response to activation of a steering device (6), by causing left and right traction devices (11, 21) on the vehicle to move at mutually the same speed or at mutually different speeds. When carrying out the method according to the invention, or when using an arrangement constructed in accordance therewith, steering is effected through the activation of clutch devices (14, 24) and brake devices (13, 23) on the vehicle, by establishing pressure changes in individual hydraulic steering control pressures, in a direction dependent on the result of a comparison made between a steer control set-point value and a steer control real-value. In this regard, the steer control real-value is generated with the aid of sensors (16, 25) which detect the rotational speed of the left and right traction devices of the vehicle. According to the invention, pressure changes are primarily effected in a hydraulic steering control pressure for one clutch device, while pressure changes in the hydraulic steering control pressure for a brake device associated with the same traction device as the aforementioned one clutch device are effected in a manner such that no braking effect is established until a given total change in the hydraulic steering pressure for the brake device is found insufficient to steer the vehicle in the manner desired.