US 8,911,317 B2 · Power split transmission

Abstract

A power split transmission, in particular an input-coupled power split transmission, includes a mechanical branch and a hydrostatic branch connected in parallel therewith. The hydrostatic branch has a closed hydraulic circuit with a first working line and a second working line with one of the working lines carrying high pressure and the other carrying low pressure. The circuit has a pressure accumulator for pressure regulation connected to the respective working line carrying high pressure. This configuration provides a power split transmission that has a hydraulic circuit in which the respective working line carrying high pressure is hydraulically smoother or more flexible by virtue of the preferably continuous connection of the pressure accumulator.

Claims17

Dependent claims

A power split transmission, comprising:

a mechanical branch;
and
a hydrostatic branch connected in parallel with the mechanical branch, the hydrostatic branch having a closed hydraulic circuit with a first working line and a second working line and with a pressure accumulator,
wherein, to regulate pressure, the pressure accumulator is continuously connected, via a valve arrangement, to the first working line when the first working line is carrying high pressure, and to the second working line when the second working line is carrying high pressure.

1 more element

Dependencies are inferred from the claim text.

Power split transmission

Life of this patent

Power split transmission

Life of this patent

Abstract

Claims17