A cooling system for an engine is provided. The cooling system includes coolant flow paths including a first flow path and a second flow path and where coolant circulates, a coolant pump for circulating coolant within the coolant flow paths, a flow rate control valve for adjusting a flow rate of the
A cooling system for an engine is provided. The cooling system includes coolant flow paths including a first flow path and a second flow path and where coolant circulates, a coolant pump for circulating coolant within the coolant flow paths, a flow rate control valve for adjusting a flow rate of the coolant through the second flow path, a temperature detector for detecting a temperature of the coolant within the first flow path, and a valve controller for adjusting an opening of the flow rate control valve based on the temperature detected by the temperature detector. The first flow path passes through a cylinder head of the engine, and the second flow path branches from the first flow path and passes through auxiliary machinery of the engine.
대표청구항▼
1. A cooling system for an engine, comprising: coolant flow paths including a first flow path and a second flow path and where coolant circulates, the first flow path passing through a cylinder head of the engine, and the second flow path branching from the first flow path and passing through auxili
1. A cooling system for an engine, comprising: coolant flow paths including a first flow path and a second flow path and where coolant circulates, the first flow path passing through a cylinder head of the engine, and the second flow path branching from the first flow path and passing through auxiliary machinery of the engine;a coolant pump for circulating the coolant within the coolant flow paths;a flow rate control valve for adjusting a flow rate of the coolant through the second flow path;a temperature detector for detecting a temperature of the coolant within the first flow path; anda valve controller for adjusting an opening of the flow rate control valve based on the temperature detected by the temperature detector,wherein when the detected temperature is below a predetermined lower temperature threshold, the valve controller adjusts the opening of the flow rate control valve to one of zero and a predetermined small opening around zero, and the valve controller increases the opening of the flow rate control valve in a stepwise fashion, by opening the flow rate control valve to the second flow path at a predetermined opening above zero that is below a fully opened predetermined second flow path target opening and maintaining the predetermined opening while the detected temperature is above the predetermined lower temperature threshold and below a predetermined upper temperature threshold, and when the detected temperature exceeds the predetermined upper temperature threshold while the predetermined opening of the flow rate control valve is being maintained, the valve controller opens the flow rate control valve to the second flow path to reach the predetermined second flow path target opening. 2. The cooling system of claim 1, wherein the auxiliary machinery of the engine is disposed at a downstream flow path of the first flow path, the downstream flow path located downstream of the branching point between the first and second flow paths, and wherein the flow rate control valve is connected with the downstream flow path and constantly maintains the opening of the valve with respect to the downstream flow path at a predetermined small opening around zero. 3. The cooling system of claim 1, wherein the auxiliary machinery disposed at the second flow path includes a heater core. 4. The cooling system of claim 3, wherein the auxiliary machinery disposed at the second flow path includes a radiator. 5. The cooling system of claim 4, wherein the coolant flow paths also include a third flow path passing through a cylinder block of the engine, wherein the flow rate control valve adjusts the flow rate of the coolant through the second and third flow paths, andwherein when the detected temperature is below a predetermined temperature threshold for the third flow path, the valve controller adjusts the opening of the flow rate control valve with respect to the third flow path to one of zero and a predetermined small opening around zero, and when the detected temperature is one of the predetermined temperature threshold for the third flow path and a value thereabove, the valve controller increases the opening of the flow rate control valve with respect to the third flow path to a predetermined third flow path target opening for the third flow path in one of the stepwise fashion and a continuous and gradual fashion, the predetermined temperature threshold for the third flow path being a value above a target threshold for the first flow path. 6. The cooling system of claim 3, wherein the coolant flow paths also include a third flow path passing through a cylinder block of the engine, wherein the flow rate control valve adjusts the flow rate of the coolant through the second and third flow paths, andwherein when the detected temperature is below a predetermined temperature threshold for the third flow path, the valve controller adjusts the opening of the flow rate control valve with respect to the third flow path to one of zero and a predetermined small opening around zero, and when the detected temperature is one of the predetermined temperature threshold for the third flow path and a value thereabove, the valve controller increases the opening of the flow rate control valve with respect to the third flow path to a predetermined third flow path target opening for the third flow path in one of the stepwise fashion and a continuous and gradual fashion, the predetermined temperature threshold for the third flow path being a value above a target threshold for the first flow path. 7. The cooling system of claim 2, wherein the auxiliary machinery disposed at the second flow path includes a heater core. 8. The cooling system of claim 7, wherein the flow rate control valve is a rotary valve for increasing the flow rate of the coolant by increasing an opening thereof. 9. The cooling system of claim 2, wherein the auxiliary machinery disposed at the second flow path includes a radiator. 10. The cooling system of claim 2, wherein the coolant flow paths also include a third flow path passing through a cylinder block of the engine, wherein the flow rate control valve adjusts the flow rate of the coolant through the second and third flow paths, andwherein when the detected temperature is below a predetermined temperature threshold for the third flow path, the valve controller adjusts the opening of the flow rate control valve with respect to the third flow path to one of zero and a predetermined small opening around zero, and when the detected temperature is one of the predetermined temperature threshold for the third flow path and a value thereabove, the valve controller increases the opening of the flow rate control valve with respect to the third flow path to a predetermined third flow path target opening for the third flow path in one of the stepwise fashion and a continuous and gradual fashion, the predetermined temperature threshold for the third flow path being a value above a target threshold for the first flow path. 11. The cooling system of claim 1, wherein the auxiliary machinery disposed at the second flow path includes a radiator. 12. The cooling system of claim 1, wherein the coolant flow paths also include a third flow path passing through a cylinder block of the engine, wherein the flow rate control valve adjusts the flow rate of the coolant through the second and third flow paths, andwherein when the detected temperature is below a predetermined temperature threshold for the third flow path, the valve controller adjusts the opening of the flow rate control valve with respect to the third flow path to one of zero and a predetermined small opening around zero, and when the detected temperature is one of the predetermined temperature threshold for the third flow path and a value thereabove, the valve controller increases the opening of the flow rate control valve with respect to the third flow path to a predetermined third flow path target opening for the third flow path in one of the stepwise fashion and a continuous and gradual fashion, the predetermined temperature threshold for the third flow path being a value above a target threshold for the first flow path. 13. The cooling system of claim 1, wherein the auxiliary machinery disposed at the second flow path includes a heater core. 14. The cooling system of claim 1, wherein the auxiliary machinery disposed at the second flow path includes a radiator. 15. The cooling system of claim 1, wherein the coolant flow paths also include a third flow path passing through a cylinder block of the engine, wherein the flow rate control valve adjusts the flow rate of the coolant through the second and third flow paths, andwherein when the detected temperature is below a predetermined temperature threshold for the third flow path, the valve controller adjusts the opening of the flow rate control valve with respect to the third flow path to one of zero and a predetermined small opening around zero, and when the detected temperature is one of the predetermined temperature threshold for the third flow path and a value thereabove, the valve controller increases the opening of the flow rate control valve with respect to the third flow path to a predetermined third flow path target opening for the third flow path in one of the stepwise fashion and a continuous and gradual fashion, the predetermined temperature threshold for the third flow path being a value above a target threshold for the first flow path. 16. The cooling system of claim 1, wherein the flow rate control valve is a rotary valve for increasing the flow rate of the coolant by increasing an opening thereof.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Lehmann Kai,DEX, Control device for the coolant and heating circulation circuit of an internal combustion engine.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.