Control apparatus for vehicular transmission

Patent metadata

Field	Value
Publication number	US-10920877-B2
Application number	US-201715795598-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Oct 27, 2016
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A control apparatus for a vehicular transmission including at least one dog clutch each having a first dog member mounted on a first shaft such that the first dog member is rotated together with the first shaft, and at least one second dog member each mounted to be axially adjacent to the first dog member and rotatable relative to the first shaft, first gears each mounted to be rotatable relative to the first shaft and provided with the second dog member, second gear which are mounted such that the second gears are rotated together with a second shaft parallel to the first shaft, and which mesh with the respective first gears, and a shifting mechanism for selectively placing each dog clutch in an engaged or released state. The control apparatus includes: a first calculating portion for detecting to a rotary angular position of the first shaft, and calculating a rotary angular position of the first dog member on the basis of the detected rotary angular position of the first shaft; a second calculating portion for detecting a rotary angular position of the second shaft, and calculating a rotary angular position of each second dog member on the basis of the detected rotary angular position of the second shaft; and an engagement control portion for controlling the shifting mechanism on the basis of the rotary angular positions of the first and second dog members, for engagement of the first and second dog members with each other.

First claim

What is claimed is:

1. A control apparatus for a vehicular transmission including (a) at least one dog clutch each having a first dog member mounted on a first shaft such that the first dog member is rotated together with the first shaft, and at least one second dog member each mounted to be axially adjacent to the first dog member and rotatable relative to the first shaft, (b) first gears each mounted to be rotatable relative to the first shaft and provided with the second dog member, (c) second gears which are mounted such that the second gears are rotated together with a second shaft parallel to the first shaft, and the second gars mesh with the respective first gears, and (d) a shifting mechanism configured to selectively place each dog clutch in an engaged or released state, said control apparatus comprising:
a first calculating portion configured to detect a rotary angular position of the first shaft, and to calculate a rotary angular position of the first dog member on the basis of the detected rotary angular position of the first shaft;
a second calculating portion configured to detect a rotary angular position of the second shaft, and to calculate a rotary angular position of each second dog member on the basis of the detected rotary angular position of the second shaft; and
an engagement control portion configured to control the shifting mechanism on the basis of the rotary angular positions of the first and second dog members, for engagement of the first and second dog members with each other.

2. The control apparatus according to claim 1 , wherein said at least one dog clutch consists of a plurality of dog clutches mounted on the first shaft.

3. The control apparatus according to claim 1 , wherein a number of dog teeth of each of the first dog members and a number of dog teeth of each of the second dog members are determined to be equal to a reciprocal of a gear ratio of the first and second gears, or a multiple of the reciprocal.

4. The control apparatus according to claim 2 , wherein number of dog teeth of each of the first dog members and a number of dog teeth of each of the second dog members are determined to be equal to a reciprocal of a gear ratio of the first and second gears, or a multiple of the reciprocal.

5. The control apparatus according to claim 1 , wherein the first shaft and the second shaft are provided with respective master splines.

6. The control apparatus according to claim 2 , wherein the first shaft and the second shaft are provided with respective master splines.

7. The control apparatus according to claim 3 , wherein the first shaft and the second shaft are provided with respective master splines.

8. The control apparatus according to claim 4 , wherein the first shaft and the second shaft are provided with respective master splines.

Assignees

• Toyota Motor Co Ltd
• Toyota Motorsport Gmbh

Inventors

• Takeuchi Shinichi
• Ichikawa Akihiko
• Yoshimura Tomohiro
• Terakawa Tomomitsu
• Yabuta Jun
• Pollmeier Klemens
• Leeuwen Lars Van
• Miller Andree
• Agostinelli Patrizio

Classifications

• F16H2003/0811

  using unsynchronised clutches · CPC title

• F16H3/0915

  with coaxial input and output shafts · CPC title

• F16H2200/0047

  the gear ratios comprising five forward speeds · CPC title

• F16H2061/047

  by preventing or solving a tooth butt situation upon engagement failure due to misalignment of teeth · CPC title

• F16H61/682

  with interruption of drive · CPC title