Coolant pump for vehicle, cooling system provided with the same and control method for the same

Patent metadata

Field	Value
Publication number	US-10794260-B2
Application number	US-201816193350-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	Apr 23, 2018
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A coolant pump for a vehicle may include an impeller mounted at one side of a shaft and pumping a coolant, a pulley mounted at the other side of the shaft and receiving a torque, a pump housing of which an outlet for the coolant to flow out therethrough is formed thereto, an inflow portion including a first inlet and a second inlet configured for receiving coolant, a slider of which a first closing portion selectively closing or opening the outlet and a second closing portion selectively closing or opening the second inlet are formed thereto, and the slider disposed slidable along longitudinal direction of the shaft and a driver moving the slider.

First claim

What is claimed is:

1. A coolant pump for a vehicle, the coolant pump comprising:
an impeller mounted at a first side of a shaft and configured for pumping a coolant;
a pulley mounted at a second side of the shaft and configured for receiving a torque to rotate the shaft;
a pump housing enclosing the impeller and including an outlet for the coolant to flow out therethrough;
an inflow portion including a first inlet and a second inlet configured for receiving coolant;
a slider slidably mounted on the shaft and slidable along a longitudinal direction of the shaft, the slider including:
a first closing portion selectively opening the outlet to fluidically-connect the first inlet to the outlet; and
a second closing portion selectively opening the second inlet to fluidically-connect the second inlet to the outlet; and

a driver configured for moving the slider.

2. The coolant pump of claim 1 ,
wherein the slider includes a vertical portion formed perpendicular to the shaft and slidably mounted to the shaft, and
wherein the first closing portion and the second closing portion are formed perpendicular to the vertical portion and connected to the vertical portion.

3. The coolant pump of claim 2 , wherein a length of the second closing portion is longer than a length of the first closing portion along the longitudinal direction of the shaft so that the outlet is opened earlier than the second inlet when the slider moves along the longitudinal direction of the shaft.

4. The coolant pump of claim 3 ,
wherein the second inlet includes an inlet partition separating the first inlet and the second inlet, and
wherein the second closing portion selectively contacts to the inlet partition for blocking coolant into the second inlet.

5. The coolant pump of claim 1 , wherein the second inlet fiducially-communicates with a radiator.

6. The coolant pump of claim 1 , wherein the driver includes:
a coolant delivery portion delivering a coolant transmitted from the first inlet;
a control unit exhausting the coolant transmitted from the coolant delivery portion to an outside or again transmitting the coolant to the coolant pump; and
a control chamber formed between the slider and the coolant pump housing, fiducially-connected to the coolant delivery portion via a supply line, and configured for moving the slider by the coolant transmitted from the coolant delivery portion.

7. The coolant pump of claim 6 , wherein a coolant delivery hole is formed at a rotation disk mounted on the shaft to fluidically-communicate with the first inlet and the coolant delivery portion.

8. The coolant pump of claim 6 , further including an elastic member mounted between the slider and the impeller to elastically support the slider.

9. The coolant pump of claim 6 , wherein the control unit includes:
a check valve connected to the supply line via a bypass line connecting the supply line and the check valve and configured for selectively preventing the coolant transmitted from the coolant delivery portion from being returned to the coolant delivery portion by selectively exhausting the coolant transmitted from the coolant delivery portion to the outside;
an actuator engaged to the check valve and selectively opening the check valve; and
a controller connected to the actuator and configured for controlling an operation of the actuator.

10. A cooling system for a vehicle, the cooling system comprising:
an engine;
a coolant control valve configured for controlling coolant exhausted from the engine;
at least one heat exchange element fiducially-communicating with the coolant control valve;
a radiator fiducially-communicating with the coolant control valve;
a coolant pump including:
an impeller mounted at a side of a shaft and configured for pumping a coolant;
a coolant pump housing enclosing the impeller and having an outlet for the coolant to flow out therethrough;
an inflow portion having a first inlet fluidically-communicating with the at least one heat exchange element and a second inlet fluidically-communicating with the radiator;
a slider slidably mounted on the shaft and slidable along a longitudinal direction of the shaft, the slider having:
a first closing portion selectively opening the outlet to fluidically-connect the first inlet to the outlet; and
a second closing portion selectively opening the second inlet to fluidically-connect the second inlet to the outlet; and

a driver configured for moving the slider;

a vehicle operation state detecting portion including a coolant temperature sensor, an accelerator pedal sensor and a vehicle speed sensor; and
a controller connected to the coolant control valve and the coolant pump and configured for receiving operation signals from the vehicle operation state detecting portion and for controlling operations of the coolant control valve and the coolant pump.

11. The cooling system of claim 10 ,
wherein the slider includes a vertical portion formed perpendicular to the shaft and slidably mounted to the shaft, and
wherein the first closing portion and the second closing portion are formed perpendicular to the vertical portion and connected to the vertical portion.

12. The cooling system of claim 11 , wherein a length of the second closing portion is longer than a length of the first closing portion along the longitudinal direction of the shaft so that the outlet is opened earlier than the second inlet when the slider moves along the longitudinal direction of the shaft.

13. The cooling system of claim 12 ,
wherein the second inlet includes an inlet partition separating the first inlet and the second inlet, and
wherein the second closing portion selectively contacts to the inlet partition for blocking coolant into the second inlet.

14. The cooling system of claim 13 , wherein the second inlet fiducially-communicates with the radiator.

15. The cooling system of claim 10 , wherein the driver includes:
a coolant delivery portion delivering a coolant transmitted from the first inlet;
a control chamber formed between the slider and the coolant pump housing, fiducially-connected to the coolant delivery portion via a supply line, and configured for moving the slider by the coolant transmitted from the coolant delivery portion; and
a control unit connected to the supply line via a bypass line connected to the supply line and the control unit and exhausting the coolant transmitted from the coolant delivery portion to an outside through the bypass line or again transmitting the coolant to the control chamber through the supply line.

16. The cooling system of claim 15 , wherein a coolant delivery hole is formed at a rotation disk mounted on the shaft to fluidically-communicate with the first inlet and the coolant delivery portion.

17. A control method for the cooling system of claim 10 , the control method including:
determining, by the controller, when the vehicle operation state signals satisfy a predetermined cold driving condition; and
controlling, by the controller, the operation of the coolant pump for the outlet and the second inlet to be closed, when the vehicle operation state signals satisfy the predetermined cold driving condition.

18. The control method of claim 17 , further including:
determining, by the controller, when the vehicle operation state signals satisfy a predetermined warm driving condition; and
controlling, by the controller, the operation of the coolant pump for the outlet to be opened and for the second inlet to be closed, when the vehicle operation state signals satisfy the pred

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Lee Hyo Jo
• Jung woo yeol
• Chung Tae Man

Classifications

• F01P5/10 Primary

  Pumping liquid coolant; Arrangements of coolant pumps · CPC title

• F01P7/14

  the coolant being liquid · CPC title

• F04D15/0005

  by using valves · CPC title

• F04D29/4293

  Details of fluid inlet or outlet · CPC title

• F01P2007/146

  using valves · CPC title