JPS5874949A - Epicycloidal gear and fluid three element parallel connection torque converter - Google Patents

Abstract

PURPOSE:To aim at enlargement in a torque ratio as well as improvement in safety and durability, by connecting both sides of the pump and the turbine of a torque converter directly to a central sun gear and a peripheral annulus internal gear respectively, while taking a turning output out of the framework of a reduction epicycloidal gear. CONSTITUTION:Both a pump 1 side and a turbine 2 side of a fluid three-element torque converter are connected to a sun gear E located at the center of an epicyclic speed change gear D and an annulus internal gear A arranged on the circumference thereof respectively and so constituted that a turning output is taken out of a framework B of a reduction epicycloidal gear F being disposed in between. Likewise, an input spot C, a stator part 3 and a stator grounding part 4 are set up. With this constitution, both reducing a fluid load by half and redoubling fuel consumption efficiency can be thus achieved.

Description

[Detailed Description of the Invention] 1. Since the fluid and the reduction gear are connected in parallel, the torque ratio becomes the sum of both, which increases safety and durability.

2. Fluid load has been halved and fuel efficiency has doubled.

3. Because the three-element fluid turbine is directly connected to the 56-ring ring gear, reverse rotation is possible when the engine is stationary, and the engine does not stop.

4. The fluid and reduction gear interpolate with each other, resulting in good shifting characteristics and reliable operation.

5. Since no control clutch is used, there is no hydraulic mechanism, making it extremely lightweight and simple.

6. When rotating at high speed and under heavy load, the reduction gear automatically allows large torque overtaking acceleration and doubles engine braking.

This will further improve fuel efficiency. Procedural amendment 1, case description 1982 Patent Application No. 173346 2, title of invention: ″O!<i′?i″i? s item l, l\='&'dy
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3. Relationship with the case of the person making the amendment Patent applicant Kagawa - Kui Shui'i'on article i"A"T left eye 3-44, Date of amendment order Voluntary amendment 5, Subject of amendment Application, specification, drawings 6. Contents of the amendment: Patent Application 1, Title of the invention: Planetary gear, fluid three-element parallel connected torque converter.

2. Scope of Claims The sun gear located at the center of the planetary gear transmission and the internally toothed annular gear located at the outer periphery are connected to the pump side and turbine side of a fluid pressure element torque converter, respectively, and a reduction gear located in the middle is provided. A planetary gear transmission and fluid three-element parallel connection torque converter designed to extract rotational output from a planetary gear framework.

3. Detailed Description of the Invention The present invention relates to a completely continuously variable transmission of a new type in which a fluid and a planetary gear transmission are connected in parallel.

More specifically, several planetary gears are disposed between the rotation input side sun gear and the internally toothed annular gear disposed on its outer periphery, and each of the gears meshes with the frame. is rotatable around the central axis of the sun gear, and a fluid-membrane pressure element torque converter located on the same central axis, the pump side and the sun gear are connected, and the turbine side and an internally toothed annular gear are connected, respectively. The present invention relates to a transmission configured to extract rotational output from a planetary gear framework.

The rotation input causes the sun gear to rotate, the several planetary gears meshed with the sun gear to rotate in reverse, and the internally toothed annular gears meshed with the respective planetary gears to rotate at a reduced speed. On the other hand, since the sun gear and the internally toothed ring gear are connected by a fluid torque converter, the output side framework receives rotational force from both the input side sun gear and the fluid. When the framework is stationary, the internally toothed ring gear, that is, the turbine side, decelerates and rotates in reverse, but as the torque ratio of the fluid increases, it begins to rotate following the sun gear in the order of reverse rotation → standstill → forward rotation. During rotation, when the sun gear is taken as a reference, the planetary gear framework rotates ahead of the turbine side by the internally toothed ring gear. At startup, the turbine rotates in reverse due to the planetary gears, but due to its structural nature, the stator of the fluid torque converter uses fluid to exert force on both turbine pumps in the forward rotation direction, so the reaction force increases in both forward and reverse rotations, and the rotation speed simply increases. This is the same as the increase, and the torque ratio does not decrease even when starting on a slope at the limit of reverse rotation fluid slip.

Moreover, whereas the conventional torque converter takes out the output from the turbine side, the present invention takes out the output by framework control, so that the sun gear standard reduction ratio, that is, the reverse rotation ratio mirror gear can effectively increase the torque ratio. This is now possible within the rotation range. Furthermore, as a result, under the same output load usage conditions as in the past, the fluid load can be reduced by the above percentage, making it possible to reduce fuel consumption loss at once.

As shown in the attached drawings and calculation sheets, the second option is an efficient combination as it can be made with the smallest diameter, with a reduction of 33% over the entire rotation range.
Performance may be improved and fluid slip loss reduced by the same proportion. Furthermore, as shown in FIG. 3, if a direct coupling clutch is provided, the loss will be further reduced.

In this way, the fluid torque ratio and the planetary gear reduction ratio can be efficiently combined according to the output usage conditions, and the maximum fluid torque ratio on the turbine side at the time of startup is determined by the fluid kinetic energy due to high-speed rotation on the input side working on the stator. On the other hand, since the framework output is mostly transmitted by the solid gear, the starting torque ratio is the moment sum of the input sun gear torque ratio and the internally toothed ring gear, that is, the turbine side fluid stall torque ratio. It can be said to be the framework output torque ratio.

As described above, it is significant that the characteristics of the torque converter of the present invention are utilized, the reduction gear and the stator are used, the turbine is operated to the reverse rotation range, and the scope of use of the turbine is expanded at once. In other words, since conventional fluid torque converter transmissions connect gear transmissions in series, fundamentally there is a large fluid slip loss, and this drawback cannot be overcome. In the present invention, by connecting the gear transmission in a special parallel manner to the fluid, the fluid loss is reduced at once through the reduction gear.

Safe overtaking acceleration performance is obtained by expanding the torque ratio range by the increasing rate of the torque ratio, and low-speed shifting and clutches are no longer necessary, as no control clutch is used at all, eliminating the need for complicated hydraulic mechanisms. Not only is it lightweight and simple, but it also has improved engine braking performance, and allows for convenient hill starts without the engine stopping when stationary.It is also characterized by good durability, high performance, high efficiency, and low cost. It features a new type of completely continuously variable transmission.

Furthermore, due to its structure, a direct coupling clutch as shown in FIG. 3 is easy to install, and with this mechanism, it is possible to further improve fuel efficiency.

4. Brief Description of the Drawings FIG. 1 is an efficiency comparison diagram of an embodiment according to the present invention and a known torque converter. FIG. 2 is a gear arrangement diagram of a planetary gear mechanism according to an embodiment of the present invention. Figure 5 is a moment calculation chart.

A... Output point of known torque converter B... Output point C of the embodiment of the present invention... Input point 1... Pump section 2... Turbine section 3...
Stator part 4... Stator grounding part Patent applicant Kiyoshi Fujikawa (zeIG 4 a b Cd G 5

Claims (1)

[Claims] The pump side and turbine side of the fluid three-element torque converter are directly connected to the central sun gear and the internally toothed outer ring gear of the planetary gear transmission, respectively, and rotational output is obtained from the frame assembly of the planetary gear for reduction located in the middle. A planetary gear with a pull-out method, and a three-element parallel-connected torque converter.