COOLING SYSTEM AND OPERATION METHOD OF ELECTRIC OIL PUMP IN COOLING SYSTEM
First Claim
1. A cooling system comprisingan electric oil pump which circulates cooling oil;
- an outside air temperature sensor which detects an outside air temperature;
an oil temperature sensor which detects an oil temperature of the cooling oil; and
a controller which judges permission for the actuation of the electric oil pump,wherein the controller has electric oil pump actuation permitting means for permitting the actuation of the electric oil pump in one ofa first case where the oil temperature detected by the oil temperature sensor is equal to or greater than a first threshold and where the outside air temperature detected by the outside air temperature sensor is equal to or greater than a second threshold,a second case where the outside air temperature is less than the second threshold and where the oil temperature is equal to or greater than a third threshold higher than the first threshold, anda third case where the oil temperature is less than the first threshold and where the outside air temperature is equal to or greater than a fourth threshold higher than the second threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A cooling system 100 includes an electric oil pump 18, an outside air temperature sensor 22, an oil temperature sensor 21, and a controller 30. The controller 30 permits the actuation of the electric oil pump 18 in one of a first case where an oil temperature To is equal to or greater than a first threshold (A) and where an outside air temperature Ta is equal to or greater than a second threshold (B), a second case where the outside air temperature Ta is less than the second threshold (B) and where the oil temperature To is equal to or greater than a third threshold (C) higher than the first threshold (A), and a third case where the oil temperature To is less than the first threshold (A) and where the outside air temperature Ta is equal to or greater than a fourth threshold (D) higher than the second threshold (B).
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Citations
7 Claims
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1. A cooling system comprising
an electric oil pump which circulates cooling oil; -
an outside air temperature sensor which detects an outside air temperature; an oil temperature sensor which detects an oil temperature of the cooling oil; and a controller which judges permission for the actuation of the electric oil pump, wherein the controller has electric oil pump actuation permitting means for permitting the actuation of the electric oil pump in one of a first case where the oil temperature detected by the oil temperature sensor is equal to or greater than a first threshold and where the outside air temperature detected by the outside air temperature sensor is equal to or greater than a second threshold, a second case where the outside air temperature is less than the second threshold and where the oil temperature is equal to or greater than a third threshold higher than the first threshold, and a third case where the oil temperature is less than the first threshold and where the outside air temperature is equal to or greater than a fourth threshold higher than the second threshold. - View Dependent Claims (2, 3, 4)
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5. An operation method of an electric oil pump in a cooling system, the cooling system comprising an electric oil pump which is disposed outside a case to store a vehicle driving motor and which circulates the cooling oil in the case through the motor, an outside air temperature sensor which detects an outside air temperature, and an oil temperature sensor which detects an oil temperature of the cooling oil in the case, the electric oil pump and the case being connected by an external pipe outside the case,
the method comprising permitting the actuation of the electric oil pump in one of a first case where the oil temperature detected by the oil temperature sensor is equal to or greater than a first threshold and where the outside air temperature detected by the outside air temperature sensor is equal to or greater than a second threshold, a second case where the outside air temperature is less than the second threshold and where the oil temperature is equal to or greater than a third threshold higher than the first threshold, and a third case where the oil temperature is less than the first threshold and where the outside air temperature is equal to or greater than a fourth threshold higher than the second threshold.
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7. A cooling system comprising:
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an electric oil pump which circulates cooling oil; an outside air temperature sensor which detects an outside air temperature; an oil temperature sensor which detects an oil temperature of the cooling oil; and a controller which includes a CPU and which judges permission for the actuation of the electric oil pump, wherein the CPU of the controller executes an electric oil pump actuation permitting program to permit the actuation of the electric oil pump in one of a first case where the oil temperature detected by the oil temperature sensor is equal to or greater than a first threshold and where the outside air temperature detected by the outside air temperature sensor is equal to or greater than a second threshold, a second case where the outside air temperature is less than the second threshold and where the oil temperature is equal to or greater than a third threshold higher than the first threshold, and a third case where the oil temperature is less than the first threshold and where the outside air temperature is equal to or greater than a fourth threshold higher than the second threshold.
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Specification