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Shift control apparatus of automatic transmission

A technology of automatic transmission and control device, applied in the direction of transmission device, transmission device control, gear transmission device, etc., can solve the problem of increasing the load required by the actuator, and achieve the effect of lightening the load, reducing the load and reducing the contact sound.

Active Publication Date: 2017-10-20
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the structure of Japanese Patent Granted Publication No. 4029875, the chamfer (chamfer) 38 and the chamfer 39 are in contact, and the internal teeth and the external teeth are engaged while sliding, thereby causing The required load of the actuator required to move the sleeve 21 in the axial direction and rotate the joint sleeve 21 increases

Method used

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  • Shift control apparatus of automatic transmission
  • Shift control apparatus of automatic transmission
  • Shift control apparatus of automatic transmission

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Embodiment approach

[0051] Hereinafter, embodiments of the present invention will be described in detail with examples. However, the constituent elements described in this embodiment are merely examples, and the technical scope of the present invention is determined by the claims, and is not limited by the following individual embodiments.

[0052] A shift control device for an automatic transmission according to an embodiment of the present invention will be described. figure 1 It is a figure which shows the schematic structure of the automatic transmission concerning embodiment. exist figure 1 In , reference sign T denotes a transmission. As the transmission T, a dual-clutch type transmission having eight forward speeds and one reverse speed, which is mounted on the vehicle 1, is taken as an example. The transmission T has gears of D, P, R, and N.

[0053] The transmission T is connected through a torque converter 12 to a drive shaft 10a of an engine (prime mover: E) 10, wherein the drive ...

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Abstract

A shift control apparatus of an automatic transmissionm which is configured to output changed rotational speed of an input shaft to an output shaft, includes: an input detecting unit configured to detect a real rotational speed of the input shaft; an output detecting unit configured to detect a real rotational speed of the output shaft; an estimating unit configured to estimate an estimated rotational speed of the input shaft, which corresponds to a shift request, by multiplying the real rotational speed of the output shaft by a target gear ratio; and a control unit configured to control the rotation of the input shaft based on a detection result from the input detecting unit. The control unit controls the rotation of the input shaft such that an upper-limiting rotational speed of a variation in real rotational speed of the input shaft is lower than the estimated rotational speed.

Description

technical field [0001] The invention relates to a speed change control device of an automatic transmission. Background technique [0002] Japanese Patent Application Laid-Open No. 4029875 discloses a structure of a vehicle control device for controlling engagement of dog clutches during gear shifting. In this structure, the internal teeth and the external teeth are brought into engagement by simultaneously executing the control to move the sleeve 21 in the axial direction and the control to rotate the sleeve 21 . [0003] However, in the structure of Japanese Patent Granted Publication No. 4029875, the chamfer (chamfer) 38 and the chamfer 39 are in contact, and the internal teeth and the external teeth are engaged while sliding, thereby causing The sleeve 21 moves in the axial direction and the required load of the actuator required to engage the sleeve 21 to rotate increases. Contents of the invention [0004] In view of the above-mentioned technical problems, the prese...

Claims

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Application Information

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IPC IPC(8): F16H59/46F16H3/12
CPCF16H3/12F16H59/46F16H2059/462F16D23/06F16D2023/0668F16D2023/0693F16H2061/0474F16H63/3023F16H2059/6815F16D11/14F16D23/02F16D2011/002F16D2011/008F16H3/091F16H59/40F16H59/42F16H59/68F16H61/0204F16H2063/3096
Inventor 松井洋树政冈泰行山下哲濑户佑香里伊贺上聪
Owner HONDA MOTOR CO LTD