JP3295990B2 - Torque converter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque converter.

[0003]

2. Description of the Related Art Conventionally, as this kind of torque converter device, one disclosed in Japanese Patent Application Laid-Open No. 62-80356 is known. This has a pump impeller connected to an input side, a turbine impeller connected to an output side, a stator impeller connected to a case side, and a working fluid filled inside. The stator impeller was configured by arranging a plurality of blades of the same shape at appropriate intervals.

[0004]

The flow direction of the working fluid into the stator impeller depends on the speed ratio (the ratio of the rotation speed of the pump impeller on the input side to the rotation speed of the turbine impeller on the output side). It changes gradually. However, in the above-described conventional apparatus, all the blades of the stator impeller have the same shape. In the case of, a high torque ratio (the ratio of the input torque of the pump impeller on the input side to the output torque of the turbine impeller on the output side) is obtained with less collision and separation of the working fluid on the blades, but at a high speed. In the case of the ratio, the collision or separation of the working fluid to the blades increases, and a high torque ratio cannot be obtained. Also, if the shape of the wings is such that the inlet-side wing angle at which the working fluid flows in is made smaller, then in the case of a high speed ratio, the working fluid is less likely to collide with and separate from the wings and is more efficient, and a higher torque ratio is obtained. However, when the speed ratio is low, the working fluid collides with and separates from the blade, and a high torque ratio cannot be obtained.

Therefore, an object of the present invention is to make it possible to always obtain a high torque ratio without being affected by the speed ratio.

[0006]

Configuration of the Invention

[0007]

In order to solve the above-mentioned technical problem, the technical means taken in the present invention is that a stator impeller is provided with a plurality of first blades having a small inlet-side blade angle into which a working fluid flows. And a plurality of second blades having a large inlet-side blade angle into which the working fluid flows and a blade length shorter than the first blade, wherein the first blades and the second blades are alternately arranged. In addition, the second wing is configured to be located substantially at the center between an inlet end of the first wing located on both sides thereof where the working fluid flows in and an outlet end of the first wing where the working fluid flows out. It is.

[0008]

According to the above technical means, in the case of a low speed ratio, a high torque ratio can be obtained by the action of the second blade, and in the case of a high speed ratio, by the action of the first blade. High efficiency is obtained and a high torque ratio is obtained. Therefore, a high torque ratio can always be obtained without being affected by the speed ratio.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the torque converter 1 includes a pump impeller 2, a turbine impeller 3, a stator impeller 4, and a hydraulic oil 5.

The pump impeller 2 is an impeller connected to a crankshaft (not shown) of the engine via a front cover 6, and has an outer pump shell 21 connected to the front cover 6 and an inner pump core. 22 and a pump blade 23 disposed between the pump shell 21 and the pump core 22. Turbine impeller 3
Is an impeller which is arranged at a position facing the pump impeller 2 and is connected to an input shaft (not shown) of an auxiliary transmission using a planetary gear or the like, and has an outer turbine shell 31 and an inner turbine core 32. And a turbine blade 33 disposed between the turbine shell 31 and the turbine core 32. The stator impeller 4 includes the pump impeller 2
And a turbine impeller 3, which is disposed at an inner peripheral position of both impellers 2 and 3 and is connected to a transmission case (not shown) via a one-way clutch 7. And a stator blade 41 which is radially arranged with respect to a rotating shaft (not shown) and which will be described later in detail. The hydraulic oil 5 is filled in a space where the pump blades 23, the turbine blades 33 and the stator blades 41 formed by the front cover 6 and the pump shell 31 are arranged, and the torque of the pump impeller 2 is reduced by the stator impeller 4.
Thus, the torque transmission medium is amplified and transmitted to the turbine impeller.

According to the above configuration, when the driving force from the engine is input to the pump impeller 2, the hydraulic oil 5 is circulated to the pump impeller 2, the turbine impeller 3, and the stator impeller 4 in order. As a result, the driving force is transmitted to the turbine impeller 3 using the hydraulic oil 5 as a medium and input to the input shaft of the auxiliary transmission. At this time, a reaction force is applied to the turbine impeller 3 by the direction changing action of the stator blades 41 when the hydraulic oil 5 flows in from the inlet side of the stator impeller 4 and flows out from the outlet side thereof. As a result, the torque of the driving force input to the input shaft of the auxiliary transmission is increased by the amount of the reaction force applied to the turbine impeller 3 with respect to the torque of the driving force from the engine.

Next, the stator blades 41 of the stator impeller 4
Will be described in detail.

As shown in FIG. 2, the stator blade 41 is composed of a plurality of first blades 411 and a plurality of second blades 412. The first blade 411 has a small blade angle A at the inlet end 411a into which the hydraulic oil 5 flows, and the inlet side end 41
The second blade 412 has a large blade angle B at the inlet end 412a into which the hydraulic oil flows, and the second blade 412 has a tapered shape.
a is a so-called high torque ratio type shape having a round shape. The length of the second wing 412 is the first wing 4
It is shorter for 11 blade lengths. The first wings 411 and the second wings 412 configured in this manner are alternately arranged, and the second wings 412 are arranged on the inlet side end 411a of the first wings 411 arranged on both sides thereof and on the outlet side where the hydraulic oil flows out. End 411
and b.

According to the above configuration, the stator impeller 4
In the case of a high speed ratio, the hydraulic oil 5 flows along the first blade 411 as shown by the dashed line in FIG. 2, and the flow is smooth without causing collision or separation with the stator blade 42. You. In the case of a low speed ratio, the air flows along the second blade 412 as shown by a two-dot chain line in FIG. 2, and the flow is smooth without causing collision or separation with the stator blade 42. Therefore, in the case of a low speed ratio, the second wing 41
2 provides a large reaction force to the stator impeller 3 to further increase the torque of the driving force input to the input shaft of the auxiliary transmission , thereby obtaining a high torque ratio. In this case, the efficiency of the first blades 411 is increased to give high efficiency, and a large reaction force is applied to the stator impeller 3 to further increase the torque of the driving force input to the input shaft of the auxiliary transmission, thereby increasing the high torque ratio. Is obtained.

As described above, the stator blades 41 are constituted by alternately arranging the first blades 411 of the so-called high efficiency type and the second blades 412 of the so-called high torque ratio type. In the case of a high speed ratio using the action of the two blades 412, the action of the first blade 411 is used, so that a high torque ratio can always be obtained without being affected by the speed ratio.
Also, only the first wing 411 which is a so-called high-efficiency type wing
And the so-called high torque
The stator using only the second blade 412, which is
Each of the cases where the blades are configured and the stator blade 4 of this embodiment
In comparison with 1, the second wing 412 is
The length of the stator impeller 4 is the same
In the same case, the blades of the stator blades using only the first blades 411
Number of stator blades using only the second blade 412 compared to the number of blades
Is more. Here, in the present embodiment, the first wing 411
Approximately between the entrance end 411a and the exit end 411b
The second wing 412 is located in the first wing 41 adjacent to the first wing 41.
The second wing 412 will be arranged in the space between the two. I
Therefore, according to the configuration of the present embodiment, only the first wing 411 is provided.
Adjacent stays compared to the case where more stator blades are configured
The distance between stator blades can be shortened,
If the heights are the same, the number of stator blades
Is larger than that of the first wing 411 alone, and the second wing 41
It's close to two .

When the number of stator blades increases, the hydraulic oil 5
Are more susceptible to wings. Therefore, high speed ratio and
Due to first wing 411 and second wing 412 at low speed ratio
The flow of the hydraulic oil 5 becomes smooth, and the reaction force applied to the turbine impeller 3 by the action of the stator blade is maintained at a high torque.

[0018]

According to the present invention, in the case of a low speed ratio, a high torque ratio can be obtained by the action of the second blade, and in the case of a high speed ratio, by the action of the first blade. High efficiency is obtained and a high torque ratio is obtained. Therefore, a high torque ratio can always be obtained without being affected by the speed ratio.

Further, the number of blades of the stator impeller is larger than that of only the blade having a smaller inlet-side blade angle into which the working fluid flows, and only the blade of the shape having a larger inlet-side blade angle. To be closer. Thus, the reaction force applied to the turbine impeller can be maintained at a high torque.

[Brief description of the drawings]

FIG. 1 is a sectional view of a torque converter device according to the present invention.

FIG. 2 is a development view of a blade showing a stator impeller.

[Explanation of symbols]

 2 Pump impeller 3 Turbine impeller 4 Stator impeller 5 Hydraulic oil (working fluid) 411 First blade 412 Second blade

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16H 41/26

Claims (1)

(57) [Claims] 1. A torque converter having a pump impeller connected to an input side, a turbine impeller connected to an output side, a stator impeller connected to a case side, and a working fluid filled inside. In the apparatus, the stator impeller has a plurality of first blades having a small inlet-side blade angle into which the working fluid flows, and a large inlet-side blade angle into which the working fluid flows, and has a blade length with respect to the first blade. A plurality of short second wings, the first wing and the second wing are alternately arranged, and the working fluid of the first wing located on both sides of the second wing flows thereinto. A torque converter configured to be located substantially at the center between an inlet end and an outlet end from which the working fluid flows out.