Importance

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Abstract

The invention relates to a manual transmission having an input shaft (12), one first and one second mechanical gear branch (26, 28) that may be coupled in a driving fashion on the input side with the input shaft and on the output side via various gears (G1, . . . , G7,R) with a common output shaft (40), and one first and one second hydrostatic machine (18, 18', 20, 20'), each comprising a primary part (16), a secondary part (22, 24), and one first and one second pressure chamber. The primary part and the secondary part of each hydrostatic machine (18, 18', 20, 20') are rotatable relative to one another, wherein the secondary part (22) of the first hydrostatic machine (18, 18') is operatively connected to the first mechanical gear branch (26) and the secondary part (24) of the second hydrostatic machine (20, 20') is operatively connected to the second mechanical gear branch (28). At least one pressure control device is associated with the hydrostatic machines, by means of which the first pressure chamber of the first hydrostatic machine (18, 18') may be hydraulically coupled to the first pressure chamber of the second hydrostatic machine (20, 20') and the second pressure chamber if the first hydrostatic machine (18, 18') may be hydraulically coupled to the second pressure chamber of the second hydrostatic machine (20, 20') so as to equalize pressure between the two hydrostatic machines, particularly for shifting gears.

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First Claim