Method for controlling EOP of torque assist AMT

Patent metadata

Field	Value
Publication number	US-9810318-B2
Application number	US-201514720425-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	Nov 19, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A method for controlling an electric oil pump (EOP) of a torque assist automated manual transmission (AMT) using a multi-plate wet clutch and a dry clutch, may include correcting an EOP operating line on a shifting pattern graph such that the EOP operates prior to up-shifting from a first gear to a second gear while driving in the first gear.

First claim

What is claimed is:

1. A method for controlling an electric oil pump (EOP) of a torque assist automated manual transmission (AMT) using a multi-plate wet clutch and a dry clutch, the method comprising; as a vehicle speed increases, starting to drive, by a controller, the EOP at a first vehicle speed lower than a 1-2 upshift vehicle speed at which a vehicle is upshifted to a second stage from a first stage, maintaining the driving of the EOP at the second stage, and after upshifting from the second stage to a third stage, stopping driving the EOP in a second vehicle speed lower than a 3-4 upshift vehicle speed upshifting from the third stage to a fourth stage.

2. The method of claim 1 , wherein as the vehicle speed decreases, the controller starts to drive the EOP at a third vehicle speed that is higher than a 3-2 downshift vehicle speed at which the vehicle is downshifted to the second stage from the third stage in a state where the EOP driving is stopped, maintaining the driving of the EOP at the second stage, and after downshifting from the second stage to the first stage, stopping driving the EOP in a fourth vehicle speed lower than a 2-1 downshift vehicle speed downshifting from the second stage to the first stage.

3. The method of claim 2 , wherein the first vehicle speed at which the driving of EOP is started while the vehicle travels with the first stage is obtained by subtracting a first constant value from the 1-2 upshift vehicle speed, and the second vehicle speed at which the driving of the EOP is stopped while the vehicle travels with the third stage is obtained by subtracting a second constant value from the 3-4 upshift vehicle speed.

4. The method of claim 2 , wherein the third vehicle speed at which the driving of the EOP is started while the vehicle travels with the three stage is obtained by adding a third constant value to the 3-2 downshift vehicle speed, and the fourth vehicle speed at which the driving of the EOP is stopped while the vehicle travels with the first stage is obtained by subtracting a fourth constant value from the 2-1 downshift vehicle speed.

5. The method of claim 2 , wherein the first vehicle speed at which the driving of the EOP is started while the vehicle travels with the first stage is obtained by subtracting a first rate of the 1-2 upshift vehicle speed from the 1-2 upshift vehicle speed, and the second vehicle speed at which the driving of the EOP is stopped while the vehicle travels with the third stage is obtained by subtracting a second rate of a difference between the 3-4 upshift vehicle speed and a 2-3 upshift vehicle speed from the 3-4 upshift vehicle speed.

6. The method of claim 2 , wherein the third vehicle speed at which the driving of the EOP is started while the vehicle travels with the three stage is obtained by adding a third rate of a difference between a 4-3 downshift vehicle speed and the 3-2 downshift vehicle speed to the 3-2 downshift vehicle speed, and the fourth vehicle speed at which the driving of the EOP is stopped while the vehicle travels with the first stage is obtained by subtracting a fourth rate of the 2-1 downshift vehicle speed from the 2-1 downshift vehicle speed.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Yoon Young Min

Classifications

• F16H61/0403 Primary

  Synchronisation before shifting · CPC title

• F16H61/04 Primary

  Smoothing ratio shift · CPC title

• F16H2061/0429

  by torque supply with a clutch in parallel torque path · CPC title

• F16H2061/0096

  using a parameter map · CPC title

• F16H61/684

  without interruption of drive · CPC title