US 12,404,657 B2
Self-propelled earth working machine having a joystick with more than one operating mode for controlling the travel movement
Marc Ridder, Vettelschoß (DE)
Assigned to Wirtgen GmbH, Windhagen (DE)
Filed by Wirtgen GmbH, Windhagen (DE)
Filed on Mar. 4, 2024, as Appl. No. 18/594,055.
Claims priority of application No. 10 2023 106 316.2 (DE), filed on Mar. 14, 2023.
Prior Publication US 2024/0318407 A1, Sep. 26, 2024
Int. Cl. E02F 9/22 (2006.01); E02F 9/20 (2006.01)
CPC E02F 9/2253 (2013.01) [E02F 9/2004 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A self-propelled earth working machine, comprising:
a machine frame;
an earth working apparatus supported by the machine frame;
a traveling gear supporting the machine frame;
a travel drive for driving the earth working machine to perform a travel movement in a moving direction; and
an operating apparatus for controlling the travel drive, wherein the operating apparatus includes at least one joystick deflectable from a reference position and a controller;
wherein the controller is configured to detect a deflection angle of the joystick in a first direction of deflection about a first axis of deflection with respect to the reference position and to control the travel drive in accordance with the detected deflection angle in the first direction of deflection irrespective of any deflection of the joystick orthogonal to the first direction of deflection in order to produce a travel movement;
wherein the controller is switchable between a first operating mode, in which the controller assigns a value of a first movement variable to the deflection angle of the joystick according to a first correlation and controls the travel drive in accordance with the first movement variable, and a second operating mode, in which the controller assigns a value of a second movement variable differing from the first movement variable to the deflection angle of the joystick according to a second correlation and controls the travel drive in accordance with the second movement variable; and
wherein the controller in the second operating mode does not control the travel drive according to the first correlation in accordance with the first movement variable.