Method and device for calibrating engine clutch delivery torque of hybrid vehicle

Patent metadata

Field	Value
Publication number	US-10352378-B2
Application number	US-201715603749-A
Country	US
Kind code	B2
Filing date	May 24, 2017
Priority date	Dec 15, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A method for calibrating engine clutch delivery torque of a hybrid vehicle includes: determining an engagement control amount of an engine clutch which connects an engine with a driving motor or disconnects the engine from the driving motor based on a difference between speeds of the engine and the driving motor; determining a current delivery torque corresponding to the engagement control amount of the engine clutch that controls the engine clutch to be in a lock-up state and a temperature of the engine clutch; extracting a previous delivery torque that corresponds to the engagement control amount that controls the engine clutch to be in the lock-up state and the temperature and is included in a map table; and applying a weighted value to each of the extracted previous delivery torque and the determined current delivery torque to calibrate the delivery torque included in the map table.

First claim

What is claimed is:

1. A method for calibrating engine clutch delivery torque of a hybrid vehicle, comprising:
determining, by a controller, an engagement control amount of an engine clutch which connects an engine with a driving motor or disconnects the engine from the driving motor based on a difference between speeds of the engine and the driving motor;
determining, by the controller, a current delivery torque corresponding to the engagement control amount of the engine clutch that controls the engine clutch to be in a lock-up state and a temperature of the engine clutch;
extracting, by the controller, a previous delivery torque that corresponds to the engagement control amount that controls the engine clutch to be in the lock-up state and the temperature and is included in a map table; and
applying, by the controller, a weighted value to each of the extracted previous delivery torque and the determined current delivery torque to calibrate a delivery torque included in the map table,
wherein the calibrated delivery torque is provided for engagement of the engine clutch when the hybrid vehicle is traveling in a hybrid electric vehicle mode.

2. The method of claim 1 , further comprising:
determining, by the controller, whether a condition for learning the delivery torque of the engine clutch is satisfied,
wherein the determining the engagement control amount proceeds when the condition is satisfied.

3. The method of claim 1 , wherein a weighted value applied to the extracted previous delivery torque is greater than a weighted value applied to the determined delivery torque.

4. The method of claim 1 , wherein the engine clutch includes a wet type engine clutch.

5. A device for calibrating engine clutch delivery torque of a hybrid vehicle, comprising:
an engine clutch configured to connect an engine with a driving motor or disconnect the engine from the driving motor; and
a controller configured to determine an engagement control amount of the engine clutch according to a difference between speeds of the engine and the driving motor,
wherein the controller determines a current delivery torque corresponding to the engagement control amount of the engine clutch that controls the engine clutch to be in a lock-up state and a temperature of the engine clutch, the controller extracts a previous delivery torque that corresponds to the engagement control amount that controls the engine clutch to be in the lock-up state and the temperature and is included in a map table, and the controller applies a weighted value to each of the extracted previous delivery torque and the determined current delivery torque to calibrate a delivery torque included in the map table.

6. The device of claim 5 , wherein a weighted value applied to the extracted previous delivery torque is greater than a weighted value applied to the determined delivery torque.

7. A non-transitory computer readable medium containing program instructions executed by a processor, the computer readable medium comprising:
program instructions that determine an engagement control amount of an engine clutch which connects an engine with a driving motor or disconnects the engine from the driving motor based on a difference between speeds of the engine and the driving motor;
program instructions that determine a current delivery torque corresponding to the engagement control amount of the engine clutch that controls the engine clutch to be in a lock-up state and a temperature of the engine clutch;
program instructions that extract a previous delivery torque that corresponds to the engagement control amount that controls the engine clutch to be in the lock-up state and the temperature and is included in a map table; and
program instructions that apply a weighted value to each of the extracted previous delivery torque and the determined current delivery torque to calibrate a delivery torque included in the map table,
wherein the calibrated delivery torque is provided for engagement of the engine clutch when the hybrid vehicle is traveling in a hybrid electric vehicle mode.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Do Hee

Classifications

• Y10S903/946

  Characterized by control of driveline clutch · CPC title

• B60Y2300/42

  Control of clutches · CPC title

• F16D2500/50287

  Torque control · CPC title

• F16D2500/30412

  Torque of the input shaft · CPC title

• F16D2500/5018

  Calibration or recalibration of the actuator · CPC title