SYSTEM AND METHOD FOR CONTROLLING FLOW RATE OF COOLANT OF GREEN CAR

• US 20140262195A1
• Filed: 12/11/2013
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: LEE, Jinhun
• Application Number:
  US14/103,813
• Publication Number:
  US 20140262195A1
• Time in Patent Office: Days
• US Class Current: 165/200
• CPC Class Codes: B60H 1/00764 the input being a vehicle driving condition, e.g. speed B60H1/00828, B60H1/00864 take precedence
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/14 Acceleration
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/642 Slope of road
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 3/003 relating to inverters
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: B60W 10/08 : including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/30 : including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/14 : in conjunction with braking regeneration
• CPC Class Codes: B60W 2510/0676 : Engine temperature
• CPC Class Codes: B60W 2510/083 : Torque
• CPC Class Codes: B60W 2510/087 : Temperature
• CPC Class Codes: B60W 2520/105 : Longitudinal acceleration
• CPC Class Codes: B60W 2530/10 : Weight
• CPC Class Codes: B60W 2552/15 : Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 30/18127 : Regenerative braking
• CPC Class Codes: F01P 2050/24 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A system and a method for controlling the flow rate of a coolant can efficiently cool cooling targets, such as motor, inverter, converter, etc., which are electric and electronic devices requiring to be cooled by water, by estimating an increase in temperature on the basis of traveling conditions of a vehicle and by increasing the flow rate of the coolant. A method of cooling electric and electronic devices in an environmentally-friendly vehicle may include determining whether driving torque or driving torque instruction value is a predetermined value or higher, determining whether regenerative braking torque is a predetermined value or higher, and increasing the flow rate of the coolant by driving a pump when the driving torque, the driving torque instruction value, or the regenerative braking torque is the corresponding predetermined value or higher.

Claims

1. A method of cooling electric and electronic devices that are cooling targets in an environmentally-friendly vehicle, the method comprising:

determining whether a driving torque or a driving torque instruction value is a predetermined value or higher;

determining whether a regenerative braking torque is a predetermined value or higher; and

increasing a flow rate of a coolant by driving a pump, when the driving torque, the driving torque instruction value, or the regenerative braking torque is the corresponding predetermined value or more.

2. The method of claim 1, wherein the factor for determining an increase in the driving torque or the driving torque instruction value includes a slope angle, amount of overload, and a rate of change in a vehicle speed.

3. The method of claim 1, further comprising increasing the flow rate of the coolant by driving the pump, when a voltage of a battery of the environmentally-friendly vehicle is a predetermined value or lower.

4. The method of claim 1, further comprising increasing the flow rate of the coolant by driving the pump, when the value obtained by subtracting external air temperature detected by an external air temperature sensor from coolant temperature detected by a coolant temperature sensor is a predetermined value or higher.

5. The method of claim 1, further comprising increasing the flow rate of the coolant by driving the pump, when the value obtained by subtracting coolant temperature detected by a coolant temperature sensor from temperature of the cooling target is a predetermined value or lower.

6. A system for cooling electric and electronic devices that are cooling targets in an environmentally-friendly vehicle, the system comprising:

a coolant temperature detector that detects coolant temperature;

a cooling target temperature detector that detects the temperature of the cooling target;

an inclination angle detector that detects a slope angle;

a vehicle speed detector that detects a vehicle speed;

a torque calculator that calculates a driving torque or a driving torque instruction value and a regenerative torque;

a pump that adjusts a flow rate of a coolant by pumping the coolant passing through a radiator; and

a controller that adjusts the flow rate of the coolant by controlling the pump on the basis of signals from the detectors,

wherein the controller is operated by a program set to perform a method including;

determining whether the driving torque or the driving torque instruction value is a predetermined value or higher; and

increasing the flow rate of the coolant by driving the pump, when the driving torque, the driving torque instruction value, or the regenerative braking torque is—

the corresponding predetermined value or higher.

7. The system of claim 6, wherein a factor for determining an increase in the driving torque or the driving torque instruction value includes a slope angle, amount of overload, and a rate of change in a vehicle speed.

8. The system of claim 6, wherein

the controller is operated by a program set to perform a method including:

increasing the flow rate of the coolant by driving the pump, when a voltage of a 12V battery of the environmentally-friendly vehicle is at a predetermined value or lower;

increasing the flow rate of the coolant by driving the pump, when the value obtained by subtracting external air temperature detected by an external air temperature sensor from coolant temperature detected by a coolant temperature sensor is at a predetermined value or higher; and

increasing the flow rate of the coolant by driving the pump, when the value obtained by subtracting the coolant temperature detected by the coolant temperature sensor from the temperature of the cooling target is at a predetermined value or lower.