Temperature management method for hybrid vehicle

Patent metadata

Field	Value
Publication number	US-10428722-B2
Application number	US-201715825922-A
Country	US
Kind code	B2
Filing date	Nov 29, 2017
Priority date	May 18, 2017
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A temperature management method for a hybrid vehicle which includes: a flow rate control valve controlling flow of coolant to an engine, a heater, a heat exchanger, and a radiator; and an exhaust heat recovery device coupled to the flow rate control valve via the heater, the exhaust heat recovery device performing heat exchange between the coolant received from the heater and exhaust gas received from the engine, and supplying the heat-exchanged coolant to the engine, includes: identifying whether the heater is on or off; and identifying at least one of an outside air temperature, a coolant temperature, or an oil temperature and operating the flow rate control valve in a flow stop mode to prevent the coolant of the engine from discharging.

First claim

What is claimed is:

1. A temperature management method for a hybrid vehicle, wherein the vehicle includes:
a flow rate control valve controlling flow of coolant to an engine, a heater, a heat exchanger, and a radiator; and
an exhaust heat recovery device coupled to the flow rate control valve via the heater, the exhaust heat recovery device performing heat exchange between the coolant received from the heater and exhaust gas received from the engine, and supplying the heat-exchanged coolant to the engine,
the method comprising:
identifying, by a controller, at a heater identification step, whether the heater is on or off; and
identifying, by the controller, at a control step, at least one of an outside air temperature, a coolant temperature, or an oil temperature depending on a result of the heater identification step, and operating the flow rate control valve in a flow stop mode to prevent the coolant of the engine from discharging.

2. The method of claim 1 , wherein the control step includes:
comparing, by the controller, at a first comparison step, the outside air temperature with a first preset value when the heater is on as the result of the heater identification step; and
operating, by the controller, at a first control step, the flow rate control valve in the flow stop mode or operating the exhaust heat recovery device based on a result of the first comparison step.

3. The method of claim 2 , wherein when the outside air temperature exceeds the first preset value as the result of the first comparison step, the controller operates the flow rate control valve in the flow stop mode at the first control step, and
when the coolant temperature exceeds a second preset value, the controller operates the exhaust heat recovery device while stopping the operating of the flow rate control valve in the flow stop mode.

4. The method of claim 2 , wherein when the outside air temperature is equal to or less than the first preset value as the result of the first comparison step, the controller operates the exhaust heat recovery device at the first control step.

5. The method of claim 1 , wherein the control step includes:
comparing, by the controller, at a second comparison step, the coolant temperature with a third preset value and comparing the oil temperature with a fourth preset value when the heater is off as the result of the heater identification step; and
operating, by the controller, at a second control step, the flow rate control valve in the flow stop mode or operating the exhaust heat recovery device based on a result of the second comparison step.

6. The method of claim 5 , wherein when the coolant temperature is less than the third preset value as the result of the second comparison step, the controller operates the flow rate control valve in the flow stop mode at the second control step, and
when the coolant temperature exceeds a second preset value, the controller operates the exhaust heat recovery device while stopping the operating of the flow rate control valve in the flow stop mode.

7. The method of claim 5 , wherein when the coolant temperature is equal to or greater than the third preset value and the oil temperature is less than the fourth preset value as the result of the second comparison step, the controller operates the exhaust heat recovery device.

8. The method of claim 5 , wherein when the coolant temperature is equal to or greater than the third preset value and the oil temperature is equal to or greater than the fourth preset value as the result of the second comparison step, the controller stops operating the flow rate control valve and the exhaust heat recovery device.

9. The method of claim 1 , wherein in the control step, the controller operates the exhaust heat recovery device based on data of identified temperature.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Seung Bum

Classifications

• F01N5/02

  the devices using heat · CPC title

• B60W20/00

  Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} · CPC title

• Y10S903/00

  Hybrid electric vehicles, HEVS · CPC title

• F01N2590/11

  for hybrid vehicles · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title