Control method of coolant control valve unit
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorYonggyu Lee
Life of this patent
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Abstract
A control method for a coolant control valve unit includes detecting the coolant temperature; opening a radiator coolant supply valve; controlling the opening rate of the valve if the detected coolant temperature is higher than a target coolant temperature; and calculating a first difference value by subtracting a hysteresis value from the target coolant temperature. The blocking or controlling of the opening rate is conducted according to the detected coolant temperature and the first difference value. The hysteresis value is variable according to outside temperature.
Claims15
A control method of a coolant control valve unit, comprising:
- detecting a coolant temperature;
- opening a radiator coolant supply valve and controlling an opening rate of the valve if the detected coolant temperature is higher than a target coolant temperature;
- and
- calculating a first difference value by subtracting a hysteresis reference value from the target coolant temperature,
- wherein controlling of the opening rate is conducted according to the detected coolant temperature and the first difference value, the controlling of the opening rate includes blocking the valve, and the hysteresis reference value is variable according to an outside temperature.
wherein the hysteresis reference value increases as the outside temperature decreases.
A control method of a coolant control valve unit, comprising:
- blocking a radiator coolant supply valve if it is determined that a detected coolant temperature is lower than a target coolant temperature;
- opening the valve and controlling an opening rate of the valve if the detected coolant temperature is higher than the target coolant temperature;
- calculating a first difference value by subtracting a hysteresis reference value from the target coolant temperature;
- determining whether an opening duration time of the valve is longer than a predetermined time if the detected coolant temperature is lower than the first difference value;
- and
- blocking the valve if the opening duration time of the valve is longer than the predetermined time, and the predetermined time is variable according to an outside temperature.
Dependencies are inferred from the claim text.