US 2001/0024987 A1Published application

Torque-split type continuously variable transmission

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorKazuo Ooyama

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Abstract

A toroidal type continuously variable transmission mechanism is mounted on a transmission input shaft coaxially therewith and joined thereto, and a first power transmission mechanism is provided between the input shaft and a transmission countershaft. A single-pinion type planetary gear mechanism is mounted on a transmission output shaft coaxially therewith, and a second power transmission mechanism is provided between driven discs of the continuously variable transmission mechanism and planetary gear mechanism. A torque-split clutch for engaging and disengaging a carrier of the planetary gear mechanism and countershaft with and from each other, a reversing brake for fixedly holding the carrier, and a starting clutch for engaging and disengaging a sun gear and output shaft with and from each other. A driving gear, which is held firmly between the driven discs, and a driven gear form the second power transmission mechanism, and a ring gear is joined to the output shaft.

Claims8

Dependent claims

A torque-split type continuously variable transmission having an input shaft connected to a driving power source, a toroidal type continuously variable transmission mechanism mounted on and connected coaxially to the input shaft, a countershaft extending in parallel with the input shaft and coaxially with the countershaft, a single-pinion type planetary gear mechanism mounted on the output shaft coaxially therewith, a first power transmission mechanism for carrying out the transmission of rotational power between the input shaft and countershaft, and a second power transmission mechanism for carrying out the transmission of rotational power between an output member of the continuously variable transmission mechanism and planetary gear mechanism, comprising:

a torque split clutch device capable of engaging and disengaging a carrier member of the single-pinion type planetary gear mechanism and countershaft with and from each other, a reversing brake device capable of firmly holding the carrier member, and a starting clutch device capable of engaging and disengaging a sun gear member of the planetary gear mechanism and output shaft with and from each other,
the toroidal type continuously variable transmission mechanism being formed of a double-cavity type toroidal continuously variable transmission mechanism in which a pair of driven discs are provided in an adjacent-side-opposed state at an axially intermediate portion thereof, a driving gear held firmly between and joined to the two driven discs and a driven gear meshed with the driving gear and joined to the sun gear member constituting the second power transmission mechanism,
a ring gear member of the planetary gear mechanism being connected to the output shaft.

A torque-split type continuously variable transmission having an input shaft connected to a driving power source, a toroidal type continuously variable transmission mechanism mounted on and connected coaxially to the input shaft, a countershaft extending in parallel with the input shaft and coaxially with the countershaft, a double-pinion type planetary gear mechanism mounted on the output shaft coaxially therewith, a first power transmission mechanism for carrying out the transmission of rotational power between the input shaft and countershaft, and a second power transmission mechanism for carrying out the transmission of rotational power between an output member of the continuously variable transmission mechanism and planetary gear mechanism, comprising:

a torque split clutch device capable of engaging and disengaging a ring gear member of the double pinion type planetary gear mechanism and countershaft with and from each other, a reversing brake device capable of firmly holding the ring gear, and a starting clutch device capable of engaging and disengaging a sun gear member of the planetary gear mechanism and output shaft with and from each other,
the toroidal type continuously variable transmission mechanism being formed of a double-cavity type toroidal continuously variable transmission mechanism in which a pair of driven discs are provided in an adjacent-side-opposed state at an axially intermediate portion thereof, a driving gear held firmly between and connected to the two driven discs and a driven gear meshed with the driving gear and connected to the sun gear member constituting the second power transmission mechanism,
a carrier member of the planetary gear mechanism being connected to the output shaft.

Dependencies are inferred from the claim text.

Facts

Application: 09/813,981Filed 22 Mar 2001
Priority: JP 2000-08574227 Mar 2000
Published: 27 Sep 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F16H 37/086
At least one power path being a continuously variable transmission, i.e. CVT: cVT using two coaxial friction members cooperating with at least one…
F16H 2037/0886
Power-split transmissions with summing differentials, with the input of the CVT connected or connectable to the input shaft: with switching means,…
F16H
Gearing

Family

US 6,520,884 B2Related patent
US 2001/0024987 A1This patent

From the US filing history. Foreign family members aren’t listed.

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