COOLING SYSTEM FOR COOLING DRIVING MOTOR OF HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME
First Claim
1. A cooling system for cooling a driving motor of a hybrid vehicle, comprising:
- an electric oil pump to generate hydraulic pressure for cooling the driving motor of the hybrid vehicle;
a switching valve to selectively transmit the hydraulic pressure generated by the electric oil pump to the driving motor;
a solenoid valve to selectively supply control pressure to the switching valve so as to switch hydraulic lines in the switching valve; and
a control portion to control operations of the electric oil pump and the switching valve,wherein the control portion is configured to operate the electric oil pump by first, second, and third operation amounts and stops the electric oil pump according to temperature of the driving motor and temperature change rate of the driving motor, and turns on or off the solenoid valve.
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Accused Products
Abstract
The present invention relates to a cooling system for cooling a driving motor of a hybrid vehicle and a method for controlling the same which supplies suitable cooling flow according to temperature and temperature change rate of the driving motor. An exemplary embodiment may include: an electric oil pump to generate hydraulic pressure for cooling the driving motor; a switching valve to selectively transmit the hydraulic pressure to the driving motor; a solenoid valve to selectively supply control pressure to the switching valve so as to switch hydraulic lines in the switching valve; and a control portion controlling operations of the electric oil pump and the switching valve, wherein the control portion operates the electric oil pump by various operation amounts or stops the electric oil pump according to temperature of the driving motor and temperature change rate of the driving motor, and turns on or off the solenoid valve.
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Citations
15 Claims
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1. A cooling system for cooling a driving motor of a hybrid vehicle, comprising:
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an electric oil pump to generate hydraulic pressure for cooling the driving motor of the hybrid vehicle; a switching valve to selectively transmit the hydraulic pressure generated by the electric oil pump to the driving motor; a solenoid valve to selectively supply control pressure to the switching valve so as to switch hydraulic lines in the switching valve; and a control portion to control operations of the electric oil pump and the switching valve, wherein the control portion is configured to operate the electric oil pump by first, second, and third operation amounts and stops the electric oil pump according to temperature of the driving motor and temperature change rate of the driving motor, and turns on or off the solenoid valve. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a cooling system which cools a driving motor of a hybrid vehicle by pumping oil by an electric oil pump and delivering the pumped oil to the driving motor by a control of a solenoid valve, the method comprising:
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determining whether the driving motor operates; detecting temperature of the driving motor in a case that the driving motor operates; calculating temperature change rate of the driving motor based on the temperature of the driving motor; determining whether the temperature change rate of the driving motor is larger than or equal to a first predetermined value; and operating the electric oil pump by a first operation amount and turning on the solenoid valve in a case that the temperature change rate of the driving motor is larger than or equal to the first predetermined value. - View Dependent Claims (7, 8, 9, 10)
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11. A tangible, non-transitory, computer-readable medium having instructions thereon to control a cooling system which cools a motor by pumping oil by an oil pump and delivering the pumped oil to the motor by a control of a solenoid valve, the instructions when executed by a processor operable to:
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determine whether the motor operates; detect temperature of the motor in a case that the motor operates; calculate temperature change rate of the motor based on the temperature of the motor; determine whether the temperature change rate of the motor is larger than or equal to a first predetermined value; and operate the oil pump by a first operation amount and turn on the solenoid valve in response to the temperature change rate of the driving motor being larger than or equal to the first predetermined value. - View Dependent Claims (12, 13, 14, 15)
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Specification