Method for operating an electric steering system of an industrial truck and industrial truck provided for this purpose

摘要

A method is provided for operating an electrical steering system of an industrial truck. An assignment assigns a target value for a rotational position of the steering wheel to each rotational position of the steered wheel. An electrical steering drive motor is provided for the steered wheel such that the detected rotational movement of the steering wheel is converted into rotational movement according to a predetermined transmission factor. An absolute value of a rotational position of the steering wheel and the steered wheel is detected during travel of the industrial truck. If the detected absolute values are related to one another according to the assignment, and if a deviation is determined, a transmission factor is specified that differs from the predetermined transmission factor for the conversion of the detected rotational movement of the steering wheel into the rotational movement of the steered wheel such that the determined deviation is automatically counteracted during the further steering movement.

主权项

1. A method for operating an electrical steering system of an industrial truck having a steering wheel and at least one steered wheel, wherein there is an assignment which assigns a target value for a rotational position (φ) of the steering wheel to each rotational position (α) of the at least one steered wheel, the method comprising:
detecting a rotational movement of the steering wheel of the industrical truck, actuating an electrical steering drive motor for the at least one steered wheel such that the detected rotational movement of the steering wheel is converted into a rotational movement of the at least one steered wheel according to a predetermined transmission factor (i), detecting an absolute value of a rotational position (φ) of the steering wheel during travel of the industrial truc, detecting an absolute value of a rotational position (α) of the steered wheel during travel of the industrial truck, checking whether the detected absolute values are related to one another according to the assignment, and its deviation is determined, specifiying a transmission factor (i+, i−) that differs from the predetermined transmission factor (i) for conversion of the detected rotational movement of the steering wheel into the rotational movement of the at least one steered wheel such that the determined deviation is automatically counteracted during a further steering movement, wherein the checking whether the detected absolute values relate to each other according to the assignment, occurs by determining a target value for rotational position (φ) of the steering wheel that is assigned to the detected absolute value of the rotational position (α) of the steered wheel, and determining a difference between the determined target value for the rotational position of the steering wheel and the detected absolute value of the rotational position of the steering wheel.