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Automatic transmission

A technology of automatic transmission and shifting stage, which is applied in the direction of vehicle gearboxes, transmission components, transmission devices, etc. It can solve the problems not mentioned above, such as difficult operation timing of claw clutches, and achieve the effect of simplifying control data

Inactive Publication Date: 2014-08-06
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the technique described in Patent Document 1, the difficulty of controlling the timing of operation of the jaw clutches is not mentioned.
Electronically controlled actuators that need to connect and release dog clutches and control their timing data, there is room for improvement in the simplification of control data

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] figure 1 It is a schematic diagram showing the transmission mechanism of the stepped automatic transmission of the first embodiment. The automatic transmission of Embodiment 1 has a torque converter TC for amplifying the driving force input from a power source such as an engine not shown in the figure, first and second meshing mechanisms D1 and D2 for switching power transmission paths, and a gear consisting of planetary gears. gear train. Such as figure 1 As shown, there is a Ravello-type planetary gear set PG as the gear train. The planetary gear set PG has a small-diameter sun gear Sd, a ring R, a long pinion LP meshing with the small-diameter sun gear Sd and the ring R, and a short pinion SP meshing with the long pinion LP and the small-diameter sun gear Sd. The long pinion LP and the short pinion SP are rotatably supported by the carrier PC.

[0054] The planetary gear set PG has four rotating members, respectively the first rotating member 8 connected to the s...

Embodiment 2

[0096] Hereinafter, Example 2 will be described. Since the meshing mechanism is the same as that of the first embodiment, the description will focus on the differences. Image 6 It is a schematic diagram showing the transmission mechanism of the stepped automatic transmission of the second embodiment. In addition, although only the speed change mechanism part is shown differently from Example 1, the transmission route to a drive wheel is the same as Example 1.

[0097] The automatic transmission of Embodiment 2 includes a torque converter TC that amplifies the driving force input from a power source such as an engine not shown in the figure, first and second meshing mechanisms D1 and D2 that switch power transmission paths, and a gear mechanism composed of planetary gears. gear train. Such as Image 6 As shown, two simple planetary gears PG1 , PG2 are present as the gear train. The first planetary gear PG1 has a first sun gear S1, a first ring R1, a first single pinion P1 ...

Embodiment 3

[0115] Embodiment 3 will be described below. Since the basic configuration is the same as that of Embodiment 2, only the points of difference will be described. Figure 8 It is a schematic diagram showing the transmission mechanism of the stepped automatic transmission according to the third embodiment. In Embodiment 3, since the configuration of the engagement mechanism is different from Embodiments 1 and 2, this point will be described.

[0116] 〔Constitution of meshing mechanism〕

[0117] In the first engagement mechanism D1 of Embodiments 1 and 2, the first hub 1 that rotates integrally with the input member IN is movable in the direction of the rotation axis by spline fitting. The joint SJ1 is coupled to be movable in the rotation axis direction. The sliding joint is a connection device that can always transmit power in the direction of rotation and allows movement in the direction of the rotation axis. Since there are various specific configurations, it is not particu...

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PUM

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Abstract

The present invention provides an automatic transmission capable of operating an engaging mechanism without causing an increase in control data. In the automatic transmission of the present invention, when the D gear is selected through the operation of the gear selector, the engine brake does not work at a predetermined shift stage, and when the L gear is selected, the engine brake works, wherein: the first meshing mechanism is provided; The second meshing mechanism; the one-way clutch arranged between the second hub and the second clutch gear; linked with the operation of the gear selector from N gear to D gear, the first linkage that makes the first meshing mechanism in the meshing state Mechanism; linked with the operation of the gear selector from D gear to L gear, the second linkage mechanism that makes the second meshing mechanism in the meshing state; the first rotating part, when in the D gear, the first meshing mechanism is in the meshing state, The driving force from the input member is transmitted through the one-way clutch. In the L range, the first meshing mechanism and the second meshing mechanism are engaged, and the driving force from the input member is not transmitted through the one-way clutch.

Description

technical field [0001] The present invention relates to a stepped automatic transmission applied as a vehicle transmission. Background technique [0002] Conventionally, as an automatic transmission in which a rotating member is fixed to a housing or the like via a dog clutch as an engagement mechanism, for example, a technique described in Patent Document 1 is known. [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 6-323377 [0004] However, in the technology described in Patent Document 1, difficulty in controlling the timing of operation of the dog clutches and the like is not mentioned. There is room for improvement in terms of simplification of the control data for the electronically controlled actuators for engaging and releasing the dog clutches and for controlling their timing. Contents of the invention [0005] SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic transmission capable of operating an engag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/10F16H3/44
CPCF16H2200/2023F16H2200/2048F16H2200/006F16H3/666F16H3/663F16H2200/0052F16H2200/2046F16H2200/2064F16H2200/2043F16H2200/0043F16H2200/2007F16H2200/2005F16H2200/201F16H3/66Y10T477/68F16H59/10B60K20/02
Inventor 小栗和夫
Owner JATCO LTD