JPH06159475A - Parallel torque converter type automatic transmission - Google Patents

Abstract

PURPOSE:To realize an automatic transmission having a simple, cheap, lightweight and compact structure by using a plurality of torque converters, in addition to a main torque converter, so as to constitute a parallel torque converter type automatic transmission. CONSTITUTION:An input shaft 1 coupled to a prime mover, is coupled direct to a main torque converter 2, and an output shaft 3 is coupled to the output side thereof. A suitable number of counter input gears 5, 6 are always meshed with a power branching gear 4 direct coupled to the input shaft 1, and auxiliary torque converters 9, 10 are driven respectively by counter input shafts 7, 8 coupled direct thereto. Counter output shafts 11, 12 and speed reduction units 13, 14 are coupled direct to the output sides of torque converters 9, 10. One-way clutches 17, 18 are located between power synthesizing gears 15, 16 coupled direct to the output shaft 3 so as to be meshed with speed reduction gears 13, 14, and the output shaft 3. With this arrangement, it is possible to provide an automatic transmission having a simple, cheap, lightweight and compact structure.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional torque converter has a practical torque increase ratio of at most about 2.5 times, and therefore has insufficient torque to be used as a transmission for automobiles. It is necessary to use a transmission together.

In order to change the speed of this auxiliary transmission,
Hydraulic pump for multi-plate crunch operation and complicated hydraulic control circuit,
Sensors and actuators for detecting shift points are required, and electronic control requires an electronic control circuit incorporating a more complicated IC circuit group. Therefore, the structure is extremely complicated as a whole, the weight is excessive, the volume is large, and the cost is high.

[0004]

SUMMARY OF THE INVENTION The present invention has a structure in which a conventional automatic transmission with a torque converter requires a planetary gear auxiliary transmission, is excessive in weight and has low fuel efficiency, and requires hydraulic control or electronic control. The problem is solved by providing a torque converter automatic transmission capable of automatically shifting only by the relative relationship between the load and the engine power, and the problem is solved.

[0005]

As means for solving the above problems, an input shaft 1 directly connected to a prime mover, a main torque converter 2 directly connected to the input shaft 1, an output shaft 3 directly connected to an output side of the main torque converter 2, and an input shaft 1 and a single or a plurality of auxiliary input gears 5, which are always meshed with the power branch gear 4.
6 and the sub input shafts 7 and 8 directly connected to the sub input gears 5 and 6, respectively.
And a sub torque converter 9 driven by the sub input shafts 7, 8.
10 and the sub output shafts 11, 1 directly connected to the sub torque converter output side
2 and reduction gears 13, 1 directly connected to the sub output shafts 11, 12.
4 and the respective reduction gears 13 and 14 always mesh with each other,
The above problem is solved by the parallel torque converter automatic transmission having the power combining gears 15 and 16 directly connected to the output shaft 3 and the one-way clutches 17 and 18 provided between the power combining gears 15 and 16 and the output shaft 3. .

[0006]

[Action] configuration greatest feature of the present invention is used in combination in addition to the sub torque converter 9, 10 of the main torque converter 2. The configuration of the present invention is
A power branch in which the input shaft 1, which is directly connected to the prime mover, the main torque converter 2, which is directly connected to the input shaft 1, and the output shaft 3, which is directly connected to the output side of the main torque converter 2, are used as the main flow of power and are further connected to the input shaft 1 as a secondary flow The gear 4 is provided, and the power is branched by one or a plurality of auxiliary input gears 5 and 6 which are constantly meshed with the power branch gear 4.

The power branched to the auxiliary input gears 5 and 6 passes through the auxiliary input shafts 7 and 8 and the auxiliary torque converters 9 and 10, respectively.
The output from the auxiliary torque converters 9 and 10 is driven by the auxiliary output shafts 11 and 12, the reduction gears 13 and 14, the power combining gear 15,
It merges with the output shaft 3 of the main torque converter 2 via 16.

The one-way clutch 17 is provided between the power combining gears 15 and 16 and the output shaft 3 so that the branching and merging of the power described above can be automatically and smoothly executed and an output corresponding to the load is automatically obtained. , 18 are provided. The above is the basic configuration of the parallel torque converter automatic transmission of the invention.

Embodiment As an embodiment of the present invention, consider a three torque converter type parallel torque converter automatic transmission in which a main torque converter 2 and two auxiliary torque converters 9 and 10 are used in combination as shown in FIG. The capacity of each torque converter is set so that the capacity of the sub torque converter is 2 when the capacity of the main torque converter is 1, and the capacity of the input torque is set to branch at a ratio of 1: 2: 2 at the time of stall. That is, when the input shaft torque is 1.0 T, the main torque converter 2 is set to have a torque of 0.2 T and the two auxiliary torque converters A and B are each branched to have a torque of 0.4 T when stalled.

[0010] The torque converter used in an embodiment of the present invention the torque converter (the torque converter)
Is a three-element one-stage two-phase torque converter that has three elements of a pump, a turbine, and a stator, and becomes a fluid clutch by releasing the one-way clutch of the stator when the clutch point is exceeded. Use about 5 items.

The number of teeth of the auxiliary input gear power branch gear 4 and the number of teeth of the auxiliary input gears 5 and 6 are the same in this embodiment. Therefore, the input shaft speed and the auxiliary input shaft speed are always the same.

[0012] reduction ratio between the reduction gear and the power combining gear of the reduction gear sub torque converter side,
As an example, the auxiliary torque converter A9 side is set to 1.67 and the auxiliary torque converter B10 side is set to about 3.33.

[0013] transmission of power in transmission above embodiment parallel torque converter automatic transmission power is first rotates the input shaft 1 by the driving force of the prime mover, the rotation of the power branching gear 4 is directly connected to the input shaft 1, the power branch The sub-input gears 5 and 6 that are always meshed with the gear 4 are rotated, and the pump impellers of the sub-torque converters 9 and 10 are rotated. The torque increasing function acts on each torque converter to rotate the output shaft of each torque converter with the increased torque.

Sub output shafts 11, 12 of the sub torque converters 9, 10.
The rotation of the reduction gears 13 and 14 directly connected to the rotators rotates the power combining gears 15 and 16 which are always meshed with each other, and combines the respective branch powers with the output shaft 3 to finally complete the power combining. To do.

Size of Torque Converter In order to set the capacity of the main torque converter 2 to 1 and the capacity of the sub torque converters 9 and 10 to 2, the capacity of the similar torque converter is proportional to the fifth power of the diameter. When is 1, the diameters of the auxiliary torque converters 9 and 10 may be set to about 1.148.

The increased torque at increasing the invention examples of torque, the power which is divided into three systems is first amplified their Te torque increasing effect of each torque converter, is further sub torque converter system, by the reduction gear 13, 14 The torque amplification is added up. In other words, deputy torque converter 9,10
The sub output shafts 11 and 12 rotate the reduction gears 13 and 14 that are directly connected to each other, and output the respective output torques to the output shaft 3 via the power combining gears 15 and 16 that are directly connected to the output shaft 3 of the main torque converter 2. give.

The output torques of the sub torque converters 9 and 10 are multiplied 3.33 times in the sub torque converter B10 system and 1.67 times in the sub torque converter A9 system, and are summed with the torque of the main torque converter 2 to give the final torque to the output shaft 3. Is output as. Therefore, the final output torque to the output shaft is as shown in FIG. In FIG. 2, e indicates the output shaft rotation speed / the input shaft rotation speed.

One-way clutch In the present invention, the auxiliary torque converters 9 and 10 are connected to the auxiliary output shaft 11,
One-way clutches 17 and 18 are provided between the power combining gears 15 and 16 and the output shaft 3 so that the number of rotations of 12 does not exceed the number of rotations of the auxiliary input shafts 7 and 8.

In the embodiment, the auxiliary torque converter B10 first reaches the clutch point due to the increase in the rotation speed of the output shaft 3,
Next, the auxiliary torque converter A9 and finally the main torque converter 2 reach the clutch point. In each torque converter that has reached the clutch point, first, the one-way clutch of the stator in the torque converter is released to operate as a fluid clutch.

Further, in each of the sub torque converters 9 and 10, when the number of rotations of the sub output shafts 11 and 12 exceeds the number of rotations of the sub input shafts 7 and 8, the power synthetic gears interlocked with the sub torque converters 9 and 10. The one-way clutches 17 and 18 incorporated in 15 and 16 are operated, and the power transmission from the sub torque converter system is released.

Variation As a modification of the embodiment of the present invention, as shown in FIG. 3, in one system of a plurality of power transmission systems, it is possible to directly connect the sub input shaft and the sub output shaft without using the sub torque converter. Is. The secondary torque converter that can be excluded is the secondary torque converter that first reaches the clutch point due to the increase in the output shaft speed.

Application to automobiles The use of the present invention as a transmission for automobiles can be easily realized by providing a reverse gear and a clutch for discontinuing power, which are well known in the art.

[0023]

With the parallel torque converter automatic transmission of the present invention, automatic shifting can be easily realized, and new effects such as easy manufacturing, low cost, light weight and compactness, and low fuel consumption can be provided.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a basic configuration of an embodiment of the present invention.

FIG. 2 is a graph showing the torque of the present invention.

FIG. 3 is a conceptual diagram of one variation of the embodiment of the present invention.

[Explanation of symbols]

 1 Input Shaft 2 Main Torque Converter 3 Output Shaft 4 Power Split Gear 5 Sub Input Gear A 6 Sub Input Gear B 7 Sub Input Shaft A 8 Sub Input Shaft B 9 Sub Torque Converter A 10 Sub Torque Converter B 11 Sub Output Shaft A 12 Sub Output Shaft B 13 Reduction gear A 14 Reduction gear B 15 Power synthetic gear A 16 Power synthetic gear B 17 One-way clutch A 18 One-way clutch B 19 Torque graph

Claims (4)

[Claims] 1. An input shaft 1 directly connected to a prime mover, a main torque converter 2 directly connected to the input shaft 1, an output shaft 3 directly connected to the output side of the main torque converter 2, and a power branch gear 4 directly connected to the input shaft 1.
A single or a plurality of sub-input gears 5 and 6 that are constantly meshed with the power branch gear 4, sub-input shafts 7 and 8 directly connected to the sub-input gears 5 and 6, and driven by the sub-input shafts 7 and 8. Sub torque converters 9 and 10, sub output shafts 11 and 12 directly connected to the output side of the sub torque converters, reduction gears 13 and 14 directly connected to the sub output shafts 11 and 12, and reduction gears 13 and 14 are constantly meshed with each other. Each power synthetic gear 15, 16 directly connected to the output shaft 3
And a one-way clutch 17, 18 provided between each power combining gear 15, 16 and the output shaft 3 in parallel torque converter automatic transmission. 2. As a modification of claim 1, an input shaft directly connected to the prime mover, a power branch gear directly connected to the input shaft, a sub-input gear meshing with the power branch gear, and a sub-input directly connected to each sub-input gear. Shaft, torque converter driven by the auxiliary input shaft,
A reduction gear directly connected to each torque converter output shaft, each power synthetic gear meshing with each reduction gear and directly connected to the same output shaft, and a one-way clutch arranged between each power synthetic gear and the output shaft as required. Parallel torque converter automatic transmission. 3. A variation of the parallel torque converter automatic transmission according to claim 1 or 2, wherein a sub torque converter in one system of a plurality of power transmission systems is eliminated, and a sub input shaft and a sub output shaft are directly connected. Parallel torque converter automatic transmission characterized by. 4. In claim 1, claim 2 and claim 3,
A reduction gear directly connected to each sub-output shaft of the input power system divided into multiple parts, each power combining gear that meshes with each reduction gear, and a one-way clutch between each power combining gear and the output shaft as necessary. An automatic shifting method characterized by automatically shifting when arranged.