Continuously variable vehicular transmission for reducing transmission torque applied to belt-type continuously variable transmission mechanism
This patent describes a continuously variable transmission for a vehicle, comprising: a torque converter driven by an engine; an input shaft connected to an output of the torque converter; a transmission output shaft; a transmission mechanism of variable ratio including a planetary gear mechanism and a controller for controlling rotational states of elements of the planetary gear mechanism. The transmission mechanism has at least reverse and forward low speed ranges of large reduction ratios and a forward high speed range of small reduction ratio. The transmission mechanism of variable ratio is in torque transmitting engagement with the input shaft and the transmission output shaft, the input shaft constituting a first input to the transmission mechanism of variable ratio; a belt-type continuously variable transmission mechanism including an input pulley in torque transmitting engagement with the input shaft and an output pulley provided on a sleeve, each pulley having a stationary flange and a movable flange axially movable with respect to the stationary flange, and torque transmitting means of an endless belt type running on the two pulleys. The output pulley is coupled to the transmission output shaft via the planetary gear mechanism in the forward high speed range.
- Assignee:
- Kabushiki Kaisha Toyota Chuo Kenkyusho
- Patent Number(s):
- US 4644821
- OSTI ID:
- 6720005
- Resource Relation:
- Patent File Date: Filed date 27 Nov 1984
- Country of Publication:
- United States
- Language:
- English
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