Robert Boschgmbh

Brueninghaus Hydromatik Gmbh

Bosch Rexroth Ag

Heinz-Gerhard Essig

Peter Schubert

Chris Shrive

Karl-Heinz Vogl

Matthias Beck

Ruprecht Anz

Graham Perry

Peter Loewe

Johannes Offenburger

Adam MacPhee

Patrick Hantke

Norbert Goettinger

Juergen Pastuschka

Sven-Ruediger Naumann

Peter Löwe

Tobias Müller

Manfred Meyer

Thomas Fröhlich

Bernd Kuhn

Peter Delissen

A hydrostatic radial piston machine is useable inversely. The hydrostatic radial piston machine has a distributor in which a flushing valve, a pressure-maintaining valve connected downstream of the flushing valve, and two nonreturn valves are arranged.

Hydrostatic radial piston machine

A hydrostatic travel drive includes a hydraulic pump that is arranged in a hydraulic circuit with two pairs of hydraulic motors. To prevent a pressure build-up between the hydraulic motors of a hydraulic motor pair on steering while stationary, a valve device is configured to set a pressure relief to a working line or to low pressure. A mobile device includes the hydrostatic travel drive.

Hydrostatic travel drive and mobile working device with such a travel drive

A hydraulic additional drive includes a hydraulic or having working ports configured to be connected to a pump via a high pressure branch and a low pressure branch. The hydraulic motor further includes a purging port to which a feed pressure is configured to be applied to set a 'free-wheel mode' while the working ports are connected to a tank. The pressure at the purging port is limited to a comparatively low value between the feed pressure and the tank pressure by a pre-charging valve integrated into the hydraulic motor. The pre-charging valve is arranged in a free-wheel duct which hydraulically connects the purging port to one of the working ports.

Hydrostatic drive

A hydrostatic traction drive includes a pressure medium source configured to drive four hydromotors connected as pairs in series, the pairs arranged parallel to each other. In a respective pressure medium flow path between the hydromotors of a series, a pressure medium volume flow is extracted which is diverted via a respective valve device to a pressure medium sink to bypass the respective downstream hydromotor. The hydrostatic traction drive also includes a control valve configured to balance the pressure on pressure differences between the pressure medium flow paths, in particular on a steering movement of an articulated steering. The control valve is configured to connect the pressure medium flow paths together hydraulically.

Hydrostatic traction drive and vehicle with such a traction drive

The invention relates to a hydrostatic multi-motor drive () with a hydraulic pump () and at least one first pair of hydraulic motors. The two hydraulic motors () of the first pair of hydraulic motors are connected to one another in series by means of a first working line section (). A bypass line () is provided which connects a first connection () of the hydraulic motor (), which is upstream in relation to a volumetric flow generated by the hydraulic pump (), to a second connection () of the downstream hydraulic motor (). A first valve unit () which interrupts the first bypass line () is arranged in the bypass line (). A first minimum pressure maintaining device () for maintaining a minimum pressure at the upstream connection () of the downstream hydraulic motor () is also arranged in the bypass line ().

Hydrostatic multi-motor drive

The invention relates to a hydrostatic drive having one hydraulic pump unit () and at least one first hydraulic motor unit () and a second hydraulic motor unit (). The first hydraulic motor unit () and the second hydraulic motor unit () are connected in parallel with the hydraulic pump unit () in a hydraulic circuit. A flow divider () is provided between the two hydraulic motor units () and the hydraulic pump unit (). The first working line () connecting the flow divider () with the hydraulic pump unit () is connected to a pressure control valve ().

Hydrostatic travel drive having two hydraulic motors

The invention relates to a hydrostatic drive () comprising at least one first hydraulic pump (), a second hydraulic pump (), and first, a second, a third, and a forth hydraulic motor (). A first connection () of the first hydraulic pump () is connected to a first connection () of the first hydraulic motor () and a first connection () of the third hydraulic motor (). A first connection () of the second hydraulic pump () is connected to a first connection () of the second hydraulic motor () and a first connection () of the fourth hydraulic motor (). A second connection () of the first hydraulic motor () and a second connection () of the fourth hydraulic motor () are connected to a second connection () of the second hydraulic pump (). A second connection () of the second hydraulic motor () and a second connection () of the third hydraulic motor () are connected to a second connection () of the first hydraulic pump ().

Hydrostatic travel drive with differential locking action

The invention relates to a method for braking a vehicle, driven by means of a hydrostatic gearbox () and a hydrostatic drive. The hydrostatic gearbox () comprises at least one adjustable hydrostatic motor (). The vehicle driven by means of the hydrostatic gearbox () may be retarded by an operating brake. On recognition of a certain braking process, the hydraulic motor () is adjusted to a minimal pivot angle. On recognition of a termination of the certain braking process, the hydraulic motor () is adjusted to a pivot angle which matches the speed achieved after the braking process.

Method for braking a vehicle driven by means of a hydrostatic gearbox and also a hydrostatic drive

A hydrostatic power train includes a hydraulic pump, which is connected, via a first main pipe and a second main pipe, to a first hydromotor unit driving a front axle and to a second hydromotor unit driving a rear axle. The first and second hydromotor units can be adjusted in terms of their displacement via a first and second variation device. A direction of travel is defined as forward movement (F) or reverse movement (R) by a position of an operating lever. The first and the second variation devices are controlled by a control valve which takes up a first control position upon a forward movement (F) determined by the position of the operating ever and which takes up a second control position upon reverse movement (R) determined by the position of the operating lever and which takes up a second control position upon reverse movement (R) determined by the operating lever. In the first control position, the first variation device is controlled such that the first motor unit is adjusted for a smaller displacement and, in the second control position; the second variation device is controlled such that the second motor unit is adjusted for a smaller displacement.

Control for a hydrostatic power train

A hydrostatic vehicle drive (,) comprises a first hydropump (,) and a second hydropump (,) as well as a first hydromotor (,) and a second hydromotor (,). The hydromotors (,) each drive separate drive lines. During straight-ahead travel operation, the hydropumps (,) and the hydromotors (,) are coupled to one another in a single, closed hydraulic circuit without crossed connections in such a manner that an input connection (,) of the first hydromotor (,) is connected to an output connection (,) of the first hydropump (,) and an input connection (,) of the second hydropump (,) is connected to an output connection (,) of the first hydromotor (,). An input connection (,) of the second hydromotor (,) is connected to an output connection (,) of the second hydropump (,), whilst an input connection (,) of the first hydropump (,) is connected to an output connection (,) of the second hydromotor (,).

Growing community of inventors

Lonsee, Germany

Heinz-Gerhard Essig