Launch control method for vehicle with dry-type clutch

Patent metadata

Field	Value
Publication number	US-9663107-B2
Application number	US-201615050936-A
Country	US
Kind code	B2
Filing date	Feb 23, 2016
Priority date	Oct 1, 2015
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A launch control method for a vehicle with a dry-type clutch includes: determining a target engine speed corresponding to an operation amount of an accelerator pedal of the vehicle when vehicle launch is started by operation of the accelerator pedal; calculating a feedforward component which is part of the torque to control the clutch using a rate of change over time of the target engine speed and a current engine torque; calculating a feedback component which is part of the torque to control the clutch based on a difference between the target engine speed and the current engine speed; calculating a compensation torque using a current engine torque and an estimated clutch torque which is estimated to be currently transferred by the clutch; and controlling a clutch actuator to drive the clutch with a sum of the feedforward component, the feedback component, and the compensation torque.

First claim

What is claimed is:

1. A launch control method for a vehicle with a dry-type clutch, comprising:
determining, by a controller, a target engine speed corresponding to an operation amount of an accelerator pedal of the vehicle when vehicle launch is started by operation of the accelerator pedal;
calculating, by the controller, a feedforward component which is part of the torque to control the clutch using a rate of change over time of the target engine speed and a current engine torque;
calculating, by the controller, a feedback component which is part of the torque to control the clutch based on a difference between the target engine speed and the current engine speed;
calculating, by the controller, a compensation torque using a current engine torque and an estimated clutch torque which is estimated to be currently transferred by the clutch; and
controlling, by the controller, a clutch actuator to drive the clutch with a sum of the feedforward component, the feedback component, and the compensation torque.

2. The launch control method of claim 1 , further comprising calculating the feedforward component by subtracting a product of the rate of change over time of the target engine speed and a rotational moment of inertia of the engine from the current engine torque.

3. The launch control method of claim 1 , further comprising calculating a Proportional Integral Differential (PID) control value corresponding to a difference obtained by subtracting the target engine speed from the current engine speed as the feedback component.

4. The launch control method of claim 1 , further comprising calculating a Proportional Integral (PI) control value corresponding to a difference obtained by subtracting the estimated clutch torque from the current engine torque as the compensation torque.

5. The launch control method of claim 1 , further comprising calculating, by a torque observer, the estimated clutch torque according to the current engine speed and the current engine torque.

6. A launch control system, comprising:
a vehicle with a dry-type clutch; and
a controller configured to:
determine a target engine speed corresponding to an operation amount of an accelerator pedal of the vehicle when vehicle launch is started by operation of the accelerator pedal,
calculate a feedforward component which is part of the torque to control the clutch using a rate of change over time of the target engine speed and a current engine torque,
calculate a feedback component which is part of the torque to control the clutch based on a difference between the target engine speed and the current engine speed,
calculate a compensation torque using a current engine torque and an estimated clutch torque which is estimated to be currently transferred by the clutch, and
control a clutch actuator to drive the clutch with a sum of the feedforward component, the feedback component, and the compensation torque.

7. A non-transitory computer readable medium containing program instructions for performing a launch control method for a vehicle with a dry-type clutch, the computer readable medium comprising:
program instructions that determine a target engine speed corresponding to an operation amount of an accelerator pedal of the vehicle when vehicle launch is started by operation of the accelerator pedal;
program instructions that calculate a feedforward component which is part of the torque to control the clutch using a rate of change over time of the target engine speed and a current engine torque;
program instructions that calculate a feedback component which is part of the torque to control the clutch based on a difference between the target engine speed and the current engine speed;
program instructions that calculate a compensation torque using a current engine torque and an estimated clutch torque which is estimated to be currently transferred by the clutch; and
program instructions that control a clutch actuator to drive the clutch with a sum of the feedforward component, the feedback component, and the compensation torque.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Jin Sung

Classifications

• B60W2050/0011

  Proportional Integral Differential [PID] controller · CPC title

• B60W2050/001

  Proportional integral [PI] controller · CPC title

• B60W30/18027 Primary

  Drive off, accelerating from standstill · CPC title

• F16H2059/746

  Engine running state, e.g. on-off of ignition switch · CPC title

• B60W30/1884

  Avoiding stall or overspeed of the engine · CPC title