The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2021
Filed:
Sep. 26, 2019
Robert Bosch Gmbh, Stuttgart, DE;
Alexander Hoegerle, Schelklingen, DE;
Franz Werner, Langenau, DE;
Matthias Mueller, Langenau, DE;
Norman Brix, Leipheim, DE;
Ronny Herrmann, Neu-Ulm, DE;
Sophia Karg, Pfaffenhofen, DE;
Steffen Mutschler, Neu-Ulm, DE;
Tobias Mueller, Lauingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
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.