Method for preventing burst of clutch for vehicle

Patent metadata

Field	Value
Publication number	US-10408286-B2
Application number	US-201715828918-A
Country	US
Kind code	B2
Filing date	Dec 1, 2017
Priority date	Sep 25, 2017
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

The present disclosure provides technology for preventing burst of a clutch under the driving circumstance, which enters into a road surface with a high friction coefficient after passing through a road surface with a low friction coefficient in vehicle driving; and the present disclosure determines if a wheel-lock has occurred in driving based on a factor reflecting a driving status of the vehicle; upon determining occurrence of the wheel-lock, in the case that a vehicle speed rapidly increases and a difference value between a transmission input shaft speed and an engine speed, which form a current driving gear, is larger than a set value, blocks a mechanical engagement between a clutch and a wheel, which form the current driving gear.

First claim

What is claimed is:

1. A method for preventing burst of a clutch for a vehicle comprising:
a wheel-lock determining step determining, in a controller, if a wheel-lock has occurred in driving, based on a factor reflecting a driving status of the vehicle; and
upon determining occurrence of the wheel-lock in the controller, in a case that a vehicle speed rapidly increases and a difference value between a speed of a transmission input shaft and an engine speed, for a current driving gear, is larger than a set value, a blocking step blocking a mechanical engagement between the clutch and a wheel, which form the current driving gear.

2. The method for preventing the burst of the clutch for the vehicle according to claim 1 ,
wherein the wheel-lock determining step determines if the vehicle speed is less than a reference vehicle speed; a target driving gear is a driving gear that is less than a certain driving gear; and a brake is an off status.

3. The method for preventing the burst of the clutch for the vehicle according to claim 1 ,
wherein the blocking step, in a case that an angular acceleration of the transmission input shaft forming the current driving gear is more than a set value of the angular acceleration, or a current vehicle speed is more than a maximum vehicle speed that may be implemented in the current driving gear, determines as a status that the vehicle speed rapidly increases.

4. The method for preventing the burst of the clutch for the vehicle according to claim 1 ,
wherein the blocking step releases the clutch from the current driving gear.

5. The method for preventing the burst of the clutch for the vehicle according to claim 1 ,
wherein the blocking step releases a gear of the driving gear from the current driving gear.

6. The method for preventing the burst of the clutch for the vehicle according to claim 1 , comprising, before the wheel-lock determining step, determining if a posture control device of a vehicle body is abnormally operated.

7. The method for preventing the burst of the clutch for the vehicle according to claim 1 , comprising, before the wheel-lock determining step, determining if a wheel speed sensor fails.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Cho Sung Hyun
• Yoon Young Min

Classifications

• F16D2500/5102

  Detecting abnormal operation, e.g. unwanted slip or excessive temperature · CPC title

• F16D2500/30806

  Engaged transmission ratio · CPC title

• F16D2500/31433

  Brake pedal position threshold, e.g. switch · CPC title

• F16D2500/31426

  Brake pedal position · CPC title

• F16D2500/3115

  Vehicle wheel speed · CPC title