192 clutches and power-stop control – Vortex-flow drive and clutch – With additional drive or clutch
Patent
1989-10-02
1991-06-04
Lorence, Richard
192 clutches and power-stop control
Vortex-flow drive and clutch
With additional drive or clutch
192 33, 192 333, F16H 4500
Patent
active
050206460
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a torque converter device used in automobiles and others, and more particularly, to a torque converter device having a friction clutch attached to the output portion of a torque converter with a directly coupled clutch for a semiautomatic type or fully automatic type vehicle and disposed at the input side of a synchromesh type speed change gear or the like.
2. Description of the Prior Art
Prior hereto in the torque converter device of the type mentioned above, the input block of a torque converter, with a directly coupled clutch, is coupled with the engine, and the output shaft of the torque converter is coupled with the input block of the synchromesh speed change gear by way of an output side friction clutch (an output clutch).
In such structure, when the vehicle starts up, a smooth starting action is realized by the torque converter, and by operating the directly coupled the output clutch while traveling, it is possible to operate in a state of high transmission efficiency, when changing the speed (changing the speed while traveling or changing over the speed change gear when stopping), a smooth speed change operation is effected by temporarily disengaging the output clutch.
In the conventional structure, however, the output clutch is a dry single-disc clutch, and is disposed between the torque converter and the speed change gear and arranged in the axial direction. The following problems are involved
In the dry clutch, because the outside diameter is large, the entire torque converter device becomes larger in size. Moreover, because the torque converter, output clutch and speed change gear are arranged axially in a row, the axial length of the entire device becomes extended. Further, in the dry clutch, when used for a long time, the friction facing becomes worn and must be replaced.
The present invention is intended to solve these problems.
SUMMARY OF THE INVENTION
To achieve the above object, in this invention, an impeller is linked to the outer circumference of the front cover which is the input unit, a turbine is located between the front cover and the impeller, a directly coupled clutch, which can be linked to the inner surface of the front cover through a friction linkage part, is arranged between the outer circumferential part of the turbine and the outer circumferential part of the front cover, an output clutch is disposed between the inner circumferential part of the turbine and the inner circumferential part of the front cover and in a space filled with working fluid at the inside, in the radial direction, of the directly coupled clutch. The output clutch is composed of multi-disc friction clutch. The output of the directly coupled clutch and the output of the turbine are linked to the input unit of the output clutch, and the output of the output clutch is linked to an output shaft.
In this construction, while the directly coupled clutch is connected, the torque is transmitted from the front cover to the input of the output clutch through the directly coupled clutch. While the directly coupled clutch is disengaged, torque is transmitted from the front cover to the input of the output clutch by way of the impeller, working fluid, and the torque converter. The torque transmitted to the input of the output clutch is transmitted to the output of the output clutch through the friction linkage part of such output clutch, while such output clutch is in connected state, and from the output unit to the output shaft.
When changing the speed in the speed change gear to which the output shaft is linked, the output clutch is disengaged. In such disengaged state, power tends to be transmitted from the input side friction disc (drive plate) to the output side friction disc (driven plate) through the working fluid between such discs. However, because the entire output clutch is disposed at the inner periphery side of the directly coupled clutch and is small in diameter, the torque transmitted through the working fluid is so sma
REFERENCES:
patent: 2355709 (1944-08-01), Dodge
patent: 4673071 (1987-06-01), Moroto et al.
Kabushiki Kaisha Daikin Seisakusho
Lorence Richard
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