Invention Grant
- Patent Title: 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
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Application No.: US16583577Application Date: 2019-09-26
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Publication No.: US10955052B2Publication Date: 2021-03-23
- Inventor: Alexander Hoegerle , Franz Werner , Matthias Mueller , Norman Brix , Ronny Herrmann , Sophia Karg , Steffen Mutschler , Tobias Mueller
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot, Moore & Beck LLP
- Priority: DE102018216750.8 20180928
- Main IPC: F16H61/438
- IPC: F16H61/438 ; F15B11/17 ; F16H61/435 ; F16H39/42 ; F16H61/4008 ; F16H61/431 ; E02F9/22

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.
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