KR20120137655A

KR20120137655A - Cooling system for hybrid vehicle

Info

Publication number: KR20120137655A
Application number: KR1020110056626A
Authority: KR
Inventors: 양승주
Original assignee: 현대자동차주식회사
Priority date: 2011-06-13
Filing date: 2011-06-13
Publication date: 2012-12-24

Abstract

The present invention is to connect the engine and PE parts in parallel to one water pump so that the engine and PE parts can be cooled smoothly with fewer parts, contributing to reducing the cost and weight of the vehicle, improving the NVH performance of the vehicle It can be used to secure a relatively advantageous characteristic in terms of securing an installation space in a vehicle.

Description

Cooling System for Hybrid Vehicle

The present invention relates to a cooling system for a hybrid vehicle, and more particularly, to a cooling system for a vehicle requiring both cooling of an engine, which is an internal combustion engine, and cooling of a power electronic component (PE) for driving an electric motor. to be.

In addition to the cooling route for cooling the engine, the hybrid vehicle should be further provided with a cooling route for cooling the PE parts. In the conventional hybrid vehicle, as shown in FIG. It is provided.

The independent cooling structure as described above requires a plurality of water pumps to increase the weight and cost of the vehicle, and noise and vibration generated when the plurality of water pumps are operated act as a deterioration of the NVH performance of the vehicle. Done.

In addition, a relatively large number of hoses are required to form two independent cooling routes, which, together with a plurality of water pumps as described above, act as a detrimental factor in securing an installation space in a vehicle.

The present invention has been made in view of the above problems, by connecting the engine and the PE parts in parallel to one water pump to enable the cooling of the engine and PE parts with fewer components, the cost of the vehicle The present invention aims to provide a cooling system for a hybrid vehicle that contributes to weight reduction, contributes to improving the vehicle's NVH performance, and is relatively advantageous in terms of securing space in the vehicle.

Cooling system of the present invention hybrid vehicle for achieving the above object is

A dual pump having separate first pumps and second pumps on both sides of the motor rotor;

An engine side cooling route connected to the first pump of the dual pump;

A PE component side cooling route connected to the second pump of the dual pump;

A reservoir tank commonly connected to both the engine side cooling route and the PE component side cooling route, and connected to the first pump and the second pump of the dual pump;

And a control unit.

The present invention is to connect the engine and PE parts in parallel to one water pump so that the engine and PE parts can be cooled smoothly with fewer parts, contributing to reducing the cost and weight of the vehicle, improving the NVH performance of the vehicle In addition, it is possible to secure a relatively advantageous characteristic in terms of securing an installation space in the vehicle.

1 is a view for explaining a cooling system of a hybrid vehicle according to the prior art,
2 is a view illustrating a cooling system of a hybrid vehicle according to the present invention;
3 is a view for explaining the structure of the dual pump used in the present invention,
4 is a cross-sectional schematic view taken along the line IV-IV of FIG.
5 to 10 are views illustrating the operation of the cooling system of the hybrid vehicle according to the present invention.

2 to 4, a cooling system of a hybrid vehicle according to an exemplary embodiment of the present invention includes a dual pump having separate first pumps 3 and second pumps 5 on both sides of the motor rotor 1. 7); An engine side cooling route (9) connected to the first pump (3) of the dual pump (7); A PE component side cooling route (11) connected to the second pump (5) of the dual pump (7); A reservoir tank connected to both the engine side cooling route 9 and the PE component side cooling route 11 and connected to the first pump 3 and the second pump 5 of the dual pump 7 13) is configured to include.

That is, the dual pump 7 and the reservoir tank 13 are connected in common so that the engine side cooling route 9 and the PE component side cooling route 11 are connected in parallel, so that the two pumps are connected to the dual pump 7. All the pumping action required for the cooling water flow of the cooling route is made, and reduced to one reservoir tank 13 to be used in common, it is possible to reduce the conduits accordingly.

The dual pump 7 forms a pumping space by surrounding a motor rotor 1 in the center, a first pump projector 15 connected to one side of the motor rotor 1, and the first pump projector 15. In addition, a pumping space is formed by surrounding a first pump housing 17 having an inlet and an outlet, a second pump projector 19 connected to the other side of the motor rotor 1, and the second pump projector 19. And a second pump housing 21 having a suction port and an outlet port, wherein the first pump projector 15 and the first pump housing 17 constitute the first pump 3. The second pump projector 19 and the second pump housing 21 constitute the second pump 5.

In addition, the dual pump (7) is installed between the motor rotor (1) and the first pump projector (15) intermittently supply the power of the motor rotor (1) to the first pump rotor (15) A second clutch provided between the first clutch 23 and the motor rotor 1 and the second pump projector 19 so as to intermittently supply the power of the motor rotor 1 to the second pump rotor 19. By providing 25, the first pump 3 and the second pump 5 can be selectively driven as necessary.

The engine side cooling route includes an engine connected to the first pump 3 and an engine radiator connected to the engine and connected to the first pump 3 to form a closed loop of cooling water.

In addition, the engine side cooling route is provided with a heater core installed to connect between the engine and the first pump (3) in parallel to the engine radiator to form a closed loop of the coolant, the engine radiator and the heater from the engine The radiator valve 27 and the heater valve 29 are respectively installed in the pipelines connected to the core so as to open and close the respective pipelines.

Therefore, only when the radiator valve 27 is opened, a coolant flow is formed from an engine to the first pump 3 via the engine radiator, and only when the heater valve 29 is opened. Coolant flow is formed from the engine to the first pump 3 via the heater core.

In addition, the engine side cooling route is provided with an overheat line 31 connecting the engine radiator and the reservoir tank 13 to be connected to the reservoir tank 13 when the engine radiator is overheated.

Meanwhile, the PE component side cooling route includes a PE component connected to the second pump 5 and a PE radiator installed to connect the PE component and the reservoir tank 13.

Looking at the operation of the cooling system of the present invention hybrid vehicle configured as described above with reference to Figures 5 to 10 as follows.

5 is a state in which only the engine side cooling route 9 is operated and the cooling action of the PE component side is not performed. Thus, only the first pump 3 is operated to deliver coolant to the engine, and the coolant that cools the engine is cooled in the engine radiator and circulated back to the first pump 3.

At this time, the radiator valve 27 is open, the heater valve 29 is closed, the room heating by the heater core is not performed.

6 shows a case in which the engine does not operate in contrast to the above, and only the PE component side cooling route 11 operates.

That is, the second clutch 25 of the dual pump 7 is fastened and the first clutch 23 is released, so that the coolant discharged by the second pump 5 cools the PE part, and then the PE It is cooled in a radiator and circulated back to the second pump 5 via the reservoir tank 13.

7 shows that both the first clutch 23 and the second clutch 25 of the dual pump 7 are fastened so that the first pump 3 and the second pump 5 both pump the action. Both the engine side cooling route 9 and the PE component side cooling route 11 are in a cooling state.

8 is a state for indoor heating during engine operation, in which only the first clutch 23 is fastened, the heater valve 29 and the radiator valve 27 are opened, and the coolant discharged by the first pump 3 is shown. Is a state passing through the heater core and the engine radiator through the engine.

9 is a view illustrating a state in which the engine is stopped but room heating is performed by waste heat of the engine, and only the heater valve 29 is opened and the radiator valve 27 is blocked so that the coolant that has passed through the engine is heated. It only circulates through the core. This is because the hybrid vehicle has a characteristic that the engine is turned on and off from time to time, and corresponding to this.

FIG. 10 is a state in which the engine and the PE parts are simultaneously cooled and the room is heated, and both the first clutch 23 and the second clutch 25 are coupled to each other so that the first pump 3 and the first pump 3 are fastened. Both the second pump 5 is operated, and both the heater valve 29 and the radiator valve 27 are open.

As described above, according to the present invention, by driving both the engine-side cooling route and the PE component-side cooling route with one dual pump, the number of parts used is reduced while ensuring the same level of cooling effect as the existing cooling system. And cost can be reduced, the constraint on the installation space is greatly reduced, it can contribute to the improvement of the NVH performance of the vehicle.

One; Motor rotor
3; 1st pump
5; 2nd pump
7; Dual pump
9; Engine Cooling Route
11; PE part side cooling route
13; Reservoir Tank
15; First pump projector
17; 1st pump housing
19; Second Pump Protor
21; 2nd pump housing
23; The first clutch
25; Second clutch
27; Radiator Valve
29; Heater valve
31; Overheated

Claims

Dual pumps 7 having separate first pumps 3 and second pumps 5 on both sides of the motor rotor 1;
An engine side cooling route connected to the first pump 3 of the dual pump 7;
A PE component side cooling route connected to the second pump 5 of the dual pump 7;
A reservoir tank 13 connected in common to both the engine side cooling route and the PE component side cooling route, and connected to the first pump 3 and the second pump 5 of the dual pump 7;
Cooling system of a hybrid vehicle, characterized in that configured to include.

The method according to claim 1,
The engine side cooling route
An engine connected with the first pump 3;
An engine radiator connected to the engine and connected to the first pump 3 to form a closed loop of cooling water;
Cooling system of a hybrid vehicle, characterized in that configured to include.

The method according to claim 2,
The engine side cooling route is further provided with a heater core installed to connect the engine and the first pump (3) in parallel to the engine radiator to form a closed loop of cooling water;
The radiator valve 27 and the heater valve 29 are respectively installed in the pipeline connected to the engine radiator and the heater core from the engine to open and close the respective pipelines.
Cooling system of a hybrid vehicle, characterized in that.

The method according to claim 2,
Further provided with an overheat line 31 for connecting the engine radiator and the reservoir tank 13 so as to be connected to the reservoir tank 13 in the overheat state of the engine radiator.
Cooling system of a hybrid vehicle, characterized in that.

The method according to claim 1,
The PE component side cooling route
PE parts connected to the second pump (5);
A PE radiator installed to connect the PE part and the reservoir tank 13;
Cooling system of a hybrid vehicle, characterized in that configured to include.

The method according to claim 1,
The dual pump 7 has a first clutch 23 and a second clutch 25 installed to intermittently supply the power of the motor rotor 1 to the first pump 3 and the second pump 5, respectively. Consisting of
Cooling system of a hybrid vehicle, characterized in that.

A motor rotor 1 in the center;
A first pump projector 15 connected to one side of the motor rotor 1;
A first pump housing 17 surrounding the first pump projector 15 to form a pumping space and having an inlet and an outlet;
A second pump projector 19 connected to the other side of the motor rotor 1;
A second pump housing 21 surrounding the second pump projector 19 to form a pumping space and having an inlet and an outlet;
Dual pump, characterized in that configured to include.

The method of claim 7,
A first clutch (23) installed between the motor rotor (1) and the first pump projector (15) so as to intermittently supply the power of the motor rotor (1) to the first pump rotor (15);
A second clutch (25) installed between the motor rotor (1) and the second pump projector (19) so as to intermittently supply the power of the motor rotor (1) to the second pump rotor (19);
Dual pump, characterized in that further comprises a.