Shift shock reduction control method of AMT vehicle

Patent metadata

Field	Value
Publication number	US-11345216-B2
Application number	US-201916670900-A
Country	US
Kind code	B2
Filing date	Oct 31, 2019
Priority date	May 7, 2019
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

An automated manual transmission (AMT) shift shock reduction control method may include a compressor delay control that is configured to keep an operation of a compressor as a non-operation state until a delay time is reached during a shift control, when an air conditioner signal and a shift signal are detected by an Engine Management System (EMS).

First claim

What is claimed is:

1. An automated manual transmission (AMT) shift shock reduction control method, comprising:
performing a compressor delay control that is configured to keep an operation of a compressor as a non-operation state until a delay time is reached during a shift control, in a response that an air conditioner signal and a shift signal are detected by an Engine Management System (EMS).

2. The AMT shift shock reduction control method of claim 1 ,
wherein the EMS is configured to receive the shift signal from a Transmission Control Unit (TCU) via a Controller Area Network (CAN) communication.

3. The AMT shift shock reduction control method of claim 1 ,
wherein the EMS is configured to detect the air conditioner signal from an air conditioner switch of a Heating, Ventilation and Air Conditioning (HVAC), and
wherein the air conditioner signal is an air conditioner ON signal for operating the compressor and an air conditioner OFF signal for stopping the compressor.

4. The AMT shift shock reduction control method of claim 1 ,
wherein the compressor delay control is configured to set the delay time, and to perform with a delay time control configured to determine when the delay time has been reached, and an icing prevention control configured to prevent an icing phenomenon of an evaporator by operating a heater until the delay time is reached.

5. The AMT shift shock reduction control method of claim 4 ,
wherein the delay time control is configured to perform with distinguishing a compressor command according to the air conditioner signal, confirming the compressor command as a COMP ON command signal and a COMP OFF command signal, and setting a COMP ON delay time (COMP ON dt ) meeting the COMP ON command signal or a COMP OFF delay time (COMP OFF dt ) meeting the COMP OFF command signal as the delay time, respectively.

6. The AMT shift shock reduction control method of claim 5 ,
wherein each of the COMP ON delay time and the COMP OFF delay time is set in units of seconds.

7. The AMT shift shock reduction control method of claim 4 ,
wherein the icing prevention control is configured to perform with determining when the delay time has been reached with a delay time count, confirming an evaporator icing condition with respect to the evaporator during the delay time count, performing an operation of the heater until the delay time is reached at a time of satisfying the evaporator icing condition, and stopping the operation of the heater at a time of not satisfying the evaporator icing condition or at a time of reaching the delay time.

8. The AMT shift shock reduction control method of claim 7 ,
wherein the evaporator icing condition includes an evaporator ambient temperature of 0° C. or less.

9. The AMT shift shock reduction control method of claim 8 ,
wherein the evaporator ambient temperature is detected by a thermistor sensor mounted at the evaporator to be transmitted to the EMS.

10. The AMT shift shock reduction control method of claim 7 ,
wherein the operation of the heater includes an operation of a heater diaphragm, and the operation of the heater diaphragm is configured to expose the heater to the evaporator.

11. The AMT shift shock reduction control method of claim 10 ,
wherein the heater diaphragm connected to an actuator is performed by an operation of the actuator by a heater controller electrically connected to the EMS.

12. The AMT shift shock reduction control method of claim 1 ,
wherein the operation of the compressor is performed with a fixed COMP control, and the fixed COMP control is configured to control an operating state of the compressor.

13. The AMT shift shock reduction control method of claim 12 ,
wherein the operating state of the compressor is controlled by one of an air conditioner switch signal, a blower signal, a thermistor sensor signal, and an air conditioner pressure, which are applied as a COMP operation factor.

14. The AMT shift shock reduction control method of claim 1 ,
wherein the shift control is performed by a Transmission Control Unit (TCU) configured for controlling an Automated Manual Transmission.

15. An automated manual transmission (AMT) vehicle comprising:
an Engine Management System (EMS) configured for performing a compressor delay control that keeps a compressor as a non-operation state until a delay time is reached during a shift control in a response that an air conditioner signal and a shift signal are detected and then performing a fixed COMP control that is configured to operate the compressor after the delay time is reached; and
a Transmission Control Unit (TCU) configured for performing the shift control by controlling the AMT, and transferring the shift signal to the EMS.

16. The AMT vehicle of claim 15 ,
wherein the compressor is a fixed compressor having a clutch controlled by the EMS.

17. The AMT vehicle of claim 15 ,
wherein a Heating, Ventilation and Air Conditioning (HVAC) includes the compressor.

18. The AMT vehicle of claim 17 ,
wherein the HVAC further includes a heater controller electrically connected to the EMS, and the heater controller is configured to control an operation of an actuator so that a heater diaphragm covering an evaporator facing the heater and connected to the actuator is tilted while operating the heater at the compressor delay control.

19. The AMT vehicle of claim 18 ,
wherein an operation of the heater is performed in a response that an evaporator ambient temperature detection value detected by a thermistor sensor provided at the evaporator is 0° C. or less.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Jeong Seong-Bin

Classifications

• B60H2001/3266

  related to the operation of the vehicle · CPC title

• F16H61/0437

  by using electrical signals (F16H61/0403 and F16H61/061 take precedence) · CPC title

• B60H2001/3273

  related to the operation of the vehicle, e.g. the compressor driving torque · CPC title

• F16H61/0202

  the signals being electric · CPC title

• F16H63/502 Primary

  for smoothing gear shifts · CPC title