TEMPERATURE MANAGEMENT METHOD FOR HYBRID VEHICLE

• US 20180334947A1
• Filed: 11/29/2017
• Published: 11/22/2018
• Est. Priority Date: 05/18/2017
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: KIM, Seung Bum
• Granted Patent: US 10,428,722 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: F01N 2240/02 a heat exchanger
• CPC Class Codes: F01N 2590/11 for hybrid vehicles
• CPC Class Codes: F01N 3/10 by thermal or catalytic conversion of noxious components of exhaust by using other chemical processes, chemical aspects of catalytic conversion, e.g. using specified catalysts, B01D53/34
• CPC Class Codes: F01N 3/2066 Selective catalytic reduction [SCR]
• CPC Class Codes: F01N 5/02 the devices using heat
• CPC Class Codes: F01P 2007/146 using valves
• CPC Class Codes: F01P 2060/16 Outlet manifold
• CPC Class Codes: F01P 3/20 Cooling circuits not specific to a single part of engine or machine F01P3/22 takes precedence
• CPC Class Codes: F01P 7/16 by thermostatic control
• CPC Class Codes: F02D 41/068 for warming-up
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y10S 903/00 Hybrid electric vehicles, HEVS

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.

Claims

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.