Schaeffler Technologies Ag & Co .kg

Hamm Ag

Andreas Roehr

Jens Hoppe

Michael Busse

Axel Roemer

Ronny Pieske

Thomas Bletscher

Thomas Henker

Michael Zimmerer

Dieter Stoecklein

A self-propelled construction device, in particular a soil compactor, includes a turbocharged diesel engine with a first radiator arrangement for cooling charge air and a second radiator arrangement for cooling a cooling liquid and/or hydraulic oil, with a first radiator fan being allocated to the first radiator arrangement and a second radiator fan being allocated to the second radiator arrangement and the first radiator fan and the second radiator fan being able to be operated essentially independently from each other.

Self-propelled construction device, in particular a soil compactor

A self-propelled compaction roller comprises a drive system having a drive assembly, a hydrostatic/mechanical transmission arrangement with a hydraulic pump, which can be driven by a primary drive of the drive assembly, and with a hydraulic motor, further having a supporting drive arrangement having a charging/driving unit and an energy storage unit, wherein the charging/driving unit can be operated in a charging mode for storing energy in the energy storage unit and can be operated in a supporting mode by withdrawing energy from the energy storage unit in order to provide a supporting torque, wherein the charging/driving unit is coupled to a power take-off of the drive assembly.

Self-propelled compaction roller and method for operating a self-propelled compaction roller

A control valve for controlling pressure medium flows, which has a cylindrical valve housing with a housing cavity The housing cavity is open at one side and has an axial outflow port, a radial first working port, a radial second working port, a radial third working port and two radial pressure ports which each open into the housing cavity. A first pressure port is arranged axially between the first working port and the second working port, and a second pressure port is arranged axially between the second working port and the third working port. Also, the control valve has a cylindrical control piston, which is axially movable within the housing cavity and has a piston cavity open at one side in the direction of the outflow port.

Control valves for controlling pressure medium flows

A device for variably adjusting control times of gas exchange valves of an internal combustion engine. The device has a drive element, an output element, a rotation angle limiting device and a control valve and counter-working pressure chambers are also provided. Phase adjustment between the output and drive element is initiated by applying pressure to one pressure chamber while discharging the other pressure chamber. The rotation angle limiting device can be locked or unlocked to prevent or allow phasing. The control valve has a valve housing and a control piston. An inflow connection, an outflow connection, a control connection and two working connections are embodied on the valve housing.

Device for variably adjusting control times of gas exchange valves of an internal combustion engine

A hydraulic directional control valve which has a valve housing and a control piston that is arranged therein in a displaceable manner. The valve housing has at least one outflow connection, at least one inflow connection and a working connection. The control piston has a main body and at least one control section. The control section controls a pressure medium flow from the inflow connection to the working connection and/or a pressure medium flow from the working connection to the outflow connection, and the control section is made separately from the main body and is fastened thereon.

Electromagnetic actuating unit

A device for variably adjusting control times of gas exchange valves of an internal combustion engine. The device has a drive element, an output element, a rotation angle limiting device, and a control valve and counter-working pressure chambers. Phase adjustment between the output and drive element is initiated by applying pressure to one of the pressure chambers while discharging the other pressure chamber. The rotation angle limiting device, which can be transferred from a locked state into an unlocked state due to pressure, prevents phasing when locked and allows phasing when unlocked. The control valve has a valve housing and a control piston. An inflow connection, an outflow connection, a first and a second working connection and a third working connection are embodied on the valve housing. The working connections are offset in relation to other and do not overlap on the valve housing.

Growing community of inventors

Weiden, Germany

Andreas Roehr