Power-split continuously variable transmission apparatus having summing planetary transmission

A stepless transmission and transmission technology, applied in transmission, friction transmission, mechanical equipment, etc., can solve problems such as the inability to realize the vehicle operating range.

Inactive Publication Date: 2016-06-29
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is the problem that with the continuously variable planetary transmission only a limited transmission ratio span is available with which the desired operating range of the vehicle cannot be achieved.

Method used

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  • Power-split continuously variable transmission apparatus having summing planetary transmission
  • Power-split continuously variable transmission apparatus having summing planetary transmission
  • Power-split continuously variable transmission apparatus having summing planetary transmission

Examples

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Embodiment Construction

[0041] figure 1 A schematic diagram of a power-split continuously variable transmission 1 is shown, which is operatively connected to a drive machine 4 via a torsional vibration damper 3 in the region of the transmission input shaft 2 . The drive engine 4 is designed here as an internal combustion engine, preferably a diesel internal combustion engine.

[0042] The torque provided by the drive machine 4 and present in the region of the transmission input shaft 2 can be directed via the first power path 5 and the second power path 6 through the transmission 1 in the direction of the transmission output shaft 7 , wherein In the first power path 5 there is a transmission 8 for changing the transmission ratio ivar of the first power path 5, and in the second power path 6 there is a mechanical transmission part 10 for achieving a constant transmission ratio ik, so the transmission The overall transmission ratio of the device 1 can be continuously varied in a desired range via the ...

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Abstract

The invention describes a power-split continuously variable transmission apparatus (1) having a summing planetary transmission (9), having at least one further planetary gear set (10) and having a variator (8), which are operatively connected to one another in the region of shafts (11, 12, 13, 14) and can be coupled to one another in the region of further shafts (15, 16, 11, 18, 14) by means of shift elements (S1 to S3) in order to realize at least three transmission ratio ranges. Within the transmission ratio ranges, a transmission ratio can be varied in continuous fashion by way of the variator (8). The variator (8) is in the form of a mechanical friction-wheel variator with at least three shafts (11, 15, 17). The summing planetary transmission (9), the at least one further planetary gear set (10) and the variator (8) are arranged coaxially with respect to one another. In one of the transmission ratio ranges, all of the power can be conducted between a transmission input shaft (2) and a transmission output shaft (7) via the variator (8). Furthermore, a friction wheel of the variator (8) is of at least approximately conical form at least in regions.

Description

technical field [0001] The invention relates to a power-split continuously variable transmission with a summing planetary transmission according to the type defined in the preamble of claim 1 . Background technique [0002] DE 10121042C1 discloses a shifting gear with a continuously variable toroidal gear and a planetary summing gear, which shifting gear is embodied with an input shaft and an output shaft coaxial therewith. In the reversing drive, a lower driving range for low driving speeds and an upper driving range with higher driving speeds can be realized, in these driving ranges, the transmission ratio of the reversing gear can be respectively infinitely variable via the toroidal drive to change. In addition, the input shaft can be drive-connected to the output shaft with a constant overall transmission ratio by bypassing the toroidal transmission by activating a shift element in the form of a gearshift clutch, wherein a so-called direct gear is engaged bit (Direktga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/08F16H15/52
CPCF16H37/0853F16H15/52F16H2037/0886F16H2037/0893
Inventor 维克托·瓦特马蒂亚斯·赖施伯恩哈德·西克
Owner ZF FRIEDRICHSHAFEN AG
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