Vehicle start and stop control based on seat heater actuation

Patent metadata

Field	Value
Publication number	US-11041474-B2
Application number	US-201916411049-A
Country	US
Kind code	B2
Filing date	May 13, 2019
Priority date	May 13, 2019
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

Systems and methods for managing auto start of a vehicle during an auto-stop condition may include determining an operational status of a vehicle climate control system; receiving a target air outlet temperature from the vehicle climate control system; receiving data indicating a state of a heated seat of the vehicle; and inhibiting a start-vehicle command to restart the vehicle because of a cabin heating requirement when the data indicates that the heated seat of the vehicle is activated.

First claim

What is claimed is:

1. A method for managing auto start of a vehicle during an auto-stop condition, the method comprising:
determining an operational status of a vehicle climate control system;
receiving a target air outlet temperature from the vehicle climate control system;
receiving data indicating a state of a heated seat of the vehicle; and
inhibiting a start-vehicle command to restart the vehicle when the data indicates that the heated seat of the vehicle is activated, the start-vehicle command being based on a cabin heating requirement to achieve the target air outlet temperature.

2. The method of claim 1 , further comprising determining whether a coolant temperature of the vehicle is above a determined coolant threshold temperature, and wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying a request to restart the vehicle when the data indicates that the heated seat of the vehicle is activated and the coolant temperature of the vehicle is below the determined coolant threshold temperature.

3. The method of claim 2 , wherein the determined coolant threshold temperature is lower than a standard coolant threshold temperature used to determine whether the vehicle operating temperature is high enough to enable the climate control system to achieve the target air outlet temperature.

4. The method of claim 1 , further comprising using sensors to determine occupancy of the vehicle and the inhibiting the start-vehicle command to restart the vehicle operation only occurs if a heated seat is activated for each occupied seating position of the vehicle.

5. The method of claim 1 , further comprising:
determining a coolant temperature of the vehicle;
if the heated seat is deactivated, inhibiting the start-vehicle command if the coolant temperature of the vehicle is above a first determined coolant threshold temperature for the vehicle; and
if the heated seat is activated, lowering the first determined coolant threshold temperature to a second determined coolant threshold temperature that is lower than the first determined coolant threshold temperature and inhibiting the start-vehicle command if the coolant temperature of the vehicle is above the second determined coolant threshold temperature for the vehicle.

6. The method of claim 5 , wherein the first determined coolant threshold temperature for the vehicle is determined as a temperature at or above which a vehicle climate control system will be able to draw sufficient thermal energy from engine coolant to heat outlet air at vehicle air vent outlets to a set target air outlet temperature.

7. The method of claim 1 , wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying the start-vehicle command for a determined period of time.

8. The method of claim 1 , wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying the start-vehicle command until another vehicle event causes a restart.

9. A vehicle, comprising:
a plurality of sensors;
a climate control system; and
an auto-start control circuit comprising an input to receive data indicating a state of a heated seat of the vehicle and an input to receive data from the climate control system indicating a target air outlet temperature, the auto-start control circuit configured to determine an operational status of a vehicle climate control system; and to inhibit a start-vehicle command to restart the vehicle when the data indicates that the heated seat of the vehicle is activated, the start-vehicle command being based on a cabin heating requirement to achieve the target air outlet temperature.

10. The vehicle of claim 9 , further comprising a coolant temperature sensor and wherein the auto-start control circuit is further configured to determine whether a coolant temperature of the vehicle is above a determined coolant threshold temperature, and wherein inhibiting the start-vehicle command to restart the vehicle comprises delaying a start-vehicle command to restart the vehicle when the data indicates that the heated seat of the vehicle is activated and the coolant temperature of the vehicle is below the determined coolant threshold temperature.

11. The vehicle of claim 10 , wherein the determined coolant threshold temperature is lower than a standard coolant threshold temperature used to determine whether the vehicle operating temperature is high enough to enable the climate control system to achieve the target air outlet temperature.

12. The vehicle of claim 9 , further comprising sensors for determining occupancy of the vehicle and wherein inhibiting the start-vehicle command only occurs if a heated seat is activated for each occupied seating position of the vehicle.

13. The vehicle of claim 9 , wherein the auto-start control circuit is further configured to perform the operations of:
determining a coolant temperature of the vehicle;
if the heated seat is deactivated, inhibiting the start-vehicle command if the coolant temperature of the vehicle is above a first determined coolant threshold temperature for the vehicle; and
if the heated seat is activated, lowering the first determined coolant threshold temperature to a second determined coolant threshold temperature that is lower than the first determined coolant threshold temperature and inhibiting the start-vehicle command if the coolant temperature of the vehicle is above the second determined coolant threshold temperature for the vehicle.

14. The vehicle of claim 13 , wherein the first determined coolant threshold temperature for the vehicle is determined as a temperature at or above which a vehicle climate control system will be able to draw thermal energy from the coolant to heat outlet air at vehicle air vent outlets to a set target air outlet temperature.

15. The vehicle of claim 9 , wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying the start-vehicle command for a determined period of time.

16. The vehicle of claim 9 , wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying the start-vehicle command until another vehicle event causes a restart.

17. An auto start control circuit, comprising a processor and a non-transitory machine-readable medium storing machine-readable instructions executable by the processor, the machine-readable instructions causing the processor to perform the operations of:
determining an operational status of a vehicle climate control system;
determining a target air outlet temperature from the vehicle climate control system;
receiving data indicating a state of a heated seat of the vehicle; and
inhibiting a start-vehicle command to restart the vehicle when the data indicates that the heated seat of the vehicle is activated, the start-vehicle command being based on a cabin heating requirement to achieve the target air outlet temperature.

18. The auto start control circuit of claim 17 , further comprising determining whether a coolant temperature of the vehicle is above a determined coolant threshold temperature, and wherein inhibiting a start-vehicle command to restart the vehicle comprises delaying a request to restart the vehicle when the data indicates that the heated seat of the vehicle is activated and the coolant temperature of the vehicle is below the determined coolant threshold temperature.

19. The auto start control circuit of claim 18 , wherein the determined coolant threshold temperature is lower than a standard coolant threshold temperature used to determine whether the vehicle operating temperatu

Assignees

• Toyota Eng & Mfg North America

Inventors

• Cosgrove David W
• Srivastava Abhishek
• Hirabayashi Hidekazu

Classifications

• Y02T10/40

  Engine management systems · CPC title

• F02N11/084 Primary

  State of vehicle accessories, e.g. air condition or power steering · CPC title

• F02N2200/08

  said parameters being related to the vehicle or its components · CPC title

• B60Y2400/302

  Temperature sensors · CPC title

• B60H1/00285 Primary

  for vehicle seats · CPC title