Vehicle engine cooling system

Patent metadata

Field	Value
Publication number	US-9611778-B2
Application number	US-201414557218-A
Country	US
Kind code	B2
Filing date	Dec 1, 2014
Priority date	May 20, 2014
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A vehicle engine cooling system may include a high temperature radiator in which a high temperature coolant for cooling an engine by using ambient air flows, a low temperature radiator in which a low temperature coolant for cooling a water-cooled condenser by using ambient air flows, an integrated cooler configured to cool a low pressure EGR gas and air which has passed through a turbocharger, a high temperature radiator circulation line provided to allow the high temperature coolant to circulate the high temperature radiator, the engine, and the integrated cooler, a low temperature radiator circulation line provided to allow the low temperature coolant to circulate the low temperature radiator, the condenser, and the integrated cooler, and a plurality of control valves provided on the high temperature radiator circulation line and the low temperature radiator circulation line.

First claim

What is claimed is:

1. A vehicle engine cooling system comprising:
a high temperature radiator in which a high temperature coolant for cooling an engine by using ambient air flows;
a low temperature radiator in which a low temperature coolant for cooling a water-cooled condenser by using ambient air flows;
an integrated cooler configured to cool a low pressure EGR gas and air which has passed through a turbocharger by using the coolant of the high temperature radiator and the coolant of the low temperature radiator;
a high temperature radiator circulation line provided to allow the high temperature coolant to circulate the high temperature radiator, the engine, and the integrated cooler;
a low temperature radiator circulation line provided to allow the low temperature coolant to circulate the low temperature radiator, the condenser, and the integrated cooler;
a plurality of control valves provided on the high temperature radiator circulation line and the low temperature radiator circulation line to control flows of the high temperature coolant and the low temperature coolant; and
an ambient air intake configured to allow ambient air in front of a vehicle to be introduced to an engine room and side ducts formed to be symmetrical to guide ambient air in front of the vehicle toward a wheel of the vehicle,
wherein the high temperature radiator includes:
a central high temperature radiator provided in the ambient air intake and first and second auxiliary high temperature radiators provided in both side ducts, and wherein the low temperature radiator includes:
a central low temperature radiator provided in the ambient air intake and first and second auxiliary low temperature radiators respectively provided in both side ducts.

2. The vehicle engine cooling system of claim 1 , wherein the integrated cooler includes:
a low temperature unit provided with a low temperature coolant inlet through which the low temperature coolant is introduced and a low temperature coolant outlet through which the low temperature coolant is discharged; and
a high temperature unit provided with a high temperature coolant inlet through which the high temperature coolant is introduced and a high temperature coolant outlet through which the high temperature coolant is discharged,
wherein the air is introduced to the integrated cooler and flows in a direction from the high temperature coolant inlet to the low temperature coolant inlet and
the low pressure EGR gas is introduced to the integrated cooler and flows in a direction from the high temperature coolant outlet to the low temperature coolant outlet.

3. The vehicle engine cooling system of claim 1 ,
wherein the plurality of control valves include:
a first valve configured to control flow of a coolant that passes through the first auxiliary low temperature radiator;
a second valve configured to control flow of a coolant that passes through the second auxiliary low temperature radiator;
a third valve configured to control flow of a coolant that passes through the first auxiliary high temperature radiator; and
a fourth valve configured to control flow of a coolant that passes through the second auxiliary high temperature radiator.

4. The vehicle engine cooling system of claim 3 , further comprising:
an active air flap provided in the ambient air intake to selectively block flow of ambient air.

5. The vehicle engine cooling system of claim 3 , wherein the low temperature radiator circulation line includes:
a first low temperature circulation line connecting the first auxiliary low temperature radiator and the central low temperature radiator;
a second low temperature circulation line connecting the central low temperature radiator and the second auxiliary low temperature radiator and having the second valve;
a third low temperature circulation line connecting the second auxiliary low temperature radiator and the condenser;
a fourth low temperature circulation line diverging from the second valve and connected to the third low temperature circulation line;
a fifth low temperature circulation line connecting the condenser and the integrated cooler;
a sixth low temperature circulation line connecting the integrated cooler and the first auxiliary low temperature radiator and having the first valve; and
a seventh low temperature circulation line diverging from the first valve and connected to the first low temperature circulation line.

6. The vehicle engine cooling system of claim 5 , wherein when a temperature of the low temperature coolant transmitted from the integrated cooler is lower than a first temperature, the first valve blocks flow of the low temperature coolant to the first auxiliary low temperature radiator.

7. The vehicle engine cooling system of claim 5 , wherein when a temperature of the low temperature coolant transmitted from the central low temperature radiator is lower than a preset second temperature, the second valve blocks flow of the low temperature coolant to the second auxiliary low temperature radiator.

8. The vehicle engine cooling system of claim 3 , wherein the high temperature radiator circulation line includes:
a first high temperature circulation line connecting the first auxiliary high temperature radiator and the central high temperature radiator;
a second high temperature circulation line connecting the central high temperature radiator and the second auxiliary high temperature radiator and having the fourth valve;
a third high temperature circulation line connecting the second auxiliary high temperature radiator and the engine;
a fourth high temperature circulation line diverging from the fourth valve and connected to the third high temperature circulation line;
a fifth high temperature line connecting the fourth high temperature circulation line and the integrated cooler;
a sixth high temperature circulation line connecting the engine and the first high temperature circulation line and having the third valve;
a seventh high temperature circulation line connecting the integrated cooler and the third valve; and
an eighth high temperature circulation line connecting the third valve and the first auxiliary high temperature radiator.

9. The vehicle engine cooling system of claim 8 , wherein when a temperature of the high temperature coolant transmitted from the integrated cooler is lower than a preset third temperature, the third valve blocks flow of the high temperature coolant to the first auxiliary high temperature radiator.

10. The vehicle engine cooling system of claim 8 , wherein when a temperature of the high temperature coolant transmitted from the central high temperature radiator is lower than a preset fourth temperature, the fourth valve blocks flow of the high temperature coolant to the second auxiliary high temperature radiator.

11. The vehicle engine cooling system of claim 1 , wherein coolant pumps are provided respectively on the high temperature radiator circulation line and the low temperature radiator circulation line.

12. A vehicle engine cooling system comprising:
an ambient air intake allowing ambient air in front of a vehicle to be introduced to an engine room;
side ducts formed to be symmetrical to guide ambient air in front of the vehicle toward a wheel of the vehicle;
a high temperature radiator including a central high temperature radiator provided in the ambient air intake and first and second auxiliary high temperature radiators provided in both side ducts;
a low temperature radiator including a central low temperature radiator provided in the ambient air intake and first and second auxiliary low temperature radiators respectively provided in both side du

Assignees

• Hyundai Motor Co Ltd

Inventors

• Nam Jongwoo
• Chung Hanshin
• Lee Joonho
• Cho Hyun

Classifications

• F02B29/0475

  the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F01P1/02

  Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders · CPC title

• F02M26/22

  with coolers in the recirculation passage · CPC title

• F02M26/06

  Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor · CPC title