Method for controlling an axial piston pump and drive unit with such an axial piston pump and hydrostatic traction drive with such a drive unit

US10955052B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexander Hoegerle · Schelklingen, DE
• Franz Werner · Meitingen, DE
• Matthias Mueller · Harsefeld, DE
• Norman Brix · Leipheim, DE
• Ronny Herrmann · Neu-Ulm, DE
• Sophia Karg · Brackenheim, DE
• Steffen Mutschler · Neu-Ulm, DE
• Tobias Mueller · Gelnhausen, DE

Key dates

• Filing date: Sep 26, 2019
• Grant date: Mar 23, 2021
• Expiry date: Sep 26, 2039

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E02F9/2253
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a drive unit which has an axial piston pump and an electronic control unit, the axial piston pump is pivoted with a method in which pressure-reducing valves which act in opposition to one another are suddenly energized. Since in this respect no orifices are provided in the adjustment device, a so-called initiation jump of the excited current gives rise to a sudden reduction in the assigned actuating pressure or the actuating pressure difference formed therefrom. Then, a zero crossover jump of the excited current or of the excited currents is carried out in order to overcome the centering spring and therefore ensure a continuous zero crossover of the axial piston pump. Furthermore, a hydrostatic traction drive includes such a drive unit.