Hydrostatic transmission
AssigneeZF Friedrichshafen AG
InventorsTorsten Berg, Jürgen Legner, Jorg Geis
Life of this patent
Estimating the term…
Abstract
A hydrostatic transmission that is operated in an open loop by way of an adjustable hydraulic motor (5), which is adjusted for the purpose of acceleration or deceleration with the aid of an electronic control unit (8) such that a desired vehicle speed corresponds to a measured vehicle speed.
Claims11
1-10. (canceled)
A hydrostatic transmission for a vehicle comprising at least one hydraulic pump (2) and at least one hydraulic motor (5) having an adjustable an intake volume, two working lines (6) being connected to the hydraulic motor (5), the hydraulic pump (2) removing hydraulic fluid from a hydraulic fluid reservoir (3) and supplying the hydraulic fluid to the hydraulic motor (5) via at least one working line (6), and a brake valve for allowing a flow of the hydraulic fluid leaving the hydraulic motor (5) to be restricted;
- wherein a sensor (11) determines at least one of a vehicle speed and an output rotational speed, which corresponds to the vehicle speed, and supplies the determined speed to an electronic control unit (8) which calculates, as a function of a desired speed, at least one of a calculated vehicle speed and a calculated output rotational speed corresponding thereto and adjusts the intake volume of the hydraulic motor (5) such that one of the vehicle speed and output rotational speed determined by the sensor (11) nearly corresponds to one of the calculated vehicle speed and the calculated output rotational speed, and the hydraulic motor is adjusted such that a previously defined deceleration level is reached during a braking operation.
Dependencies are inferred from the claim text.