U.S. patent application number 13/730517 was filed with the patent office on 2013-12-19 for engine cooling system for vehicle.
This patent application is currently assigned to Hyundai Motor Company. The applicant listed for this patent is HYUNDAI MOTOR COMPANY. Invention is credited to Bongseong Kang.
Application Number | 20130333642 13/730517 |
Document ID | / |
Family ID | 49667911 |
Filed Date | 2013-12-19 |
United States Patent
Application |
20130333642 |
Kind Code |
A1 |
Kang; Bongseong |
December 19, 2013 |
ENGINE COOLING SYSTEM FOR VEHICLE
Abstract
An engine cooling system for a vehicle may include a cooling
unit that circulates coolant through a cooling line connecting a
water jacket, a water pump, and a radiator of an engine to cool the
engine, and a sub-cooling unit that selectively circulates coolant
through a sub-cooling line connecting the engine with a
refrigerator so as to cool the engine.
Inventors: |
Kang; Bongseong; (Gunpo-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HYUNDAI MOTOR COMPANY |
Seoul |
|
KR |
|
|
Assignee: |
Hyundai Motor Company
Seoul
KR
|
Family ID: |
49667911 |
Appl. No.: |
13/730517 |
Filed: |
December 31, 2012 |
Current U.S.
Class: |
123/41.08 |
Current CPC
Class: |
F01P 7/167 20130101;
F01P 9/06 20130101; F01P 2025/64 20130101; F01P 2025/62 20130101;
F02F 1/40 20130101 |
Class at
Publication: |
123/41.08 |
International
Class: |
F01P 7/16 20060101
F01P007/16 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 18, 2012 |
KR |
10-2012-0065143 |
Claims
1. An engine cooling system for a vehicle, comprising: a cooling
unit that circulates coolant through a cooling line connecting a
water jacket, a water pump, and a radiator of an engine to cool the
engine; and a sub-cooling unit that selectively circulates coolant
through a sub-cooling line connecting the engine with a
refrigerator so as to cool the engine.
2. The engine cooling system for the vehicle of claim 1, wherein
the refrigerator is disposed outside the engine, and wherein the
sub-cooling line includes: a first line that is diverged from the
cooling line that connects the water pump with the engine and
connected to the refrigerator to supply the refrigerator with
coolant; and a second line connecting the refrigerator and a
sub-water jacket of the engine to supply the sub-water jacket with
the coolant passing through the refrigerator.
3. The engine cooling system for the vehicle of claim 2, wherein a
valve is mounted in the second line between the refrigerator and
the sub-water jacket.
4. The engine cooling system for the vehicle of claim 3, wherein
the valve opens the sub-cooling line to supply the sub-water jacket
with the coolant that is cooled by the refrigerator when the engine
is in a speed condition or a load condition.
5. The engine cooling system for the vehicle of claim 2, wherein
the sub-water jacket includes: a first connection passage that is
formed at both lateral sides in a length direction of a cylinder
head and connected to the second line of the sub-cooling line; and
at least a second connection passage that is connected to the first
connection passage and is respectively formed corresponding to a
combustion chamber.
6. The engine cooling system for the vehicle of claim 5, wherein
one end side of the second connection passage is connected to the
first connection passage and the other end side thereof is formed
toward an inner side of the cylinder head, and the second
connection passage is formed vertically with regard to the first
connection passage.
7. The engine cooling system for the vehicle of claim 2, wherein
the sub-water jacket includes: a first connection passage that is
formed at both lateral sides in a length direction of a cylinder
head and connected to the second line of the sub-cooling line; and
at least a second connection passage that is connected to the first
connection passage and is respectively formed between combustion
chambers.
8. The engine cooling system for the vehicle of claim 7, wherein
one end side of the second connection passage is connected to the
first connection passage and the other end side thereof is formed
toward an inner side of the cylinder head, and the second
connection passage is formed vertically with regard to the first
connection passage.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2012-0065143 filed on Jun. 18, 2012, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention related to an engine cooling system
for a vehicle. More particularly, the present invention relates to
an engine cooling system for a vehicle that supplies an engine with
cooled coolant to cool an overheated combustion chamber according
to a driving condition of an engine.
[0004] 2. Description of Related Art
[0005] Generally, a part of the heat that is generated from
combustion chambers of an engine is absorbed by a cylinder head, a
cylinder block, an intake/exhaust valve, and a piston.
[0006] These components can be transformed by the excessive heat of
the combustion chamber or an oil film of the cylinder can be
damaged thereby.
[0007] Accordingly, the excessive heat causes combustion fault,
knocking, or pre-ignition to damage the piston and the cylinder
block, and the heat efficiency and the output can be deteriorated.
In contrast, excessive cooling of the engine can deteriorate
output, increases fuel consumption, and causes low temperature
abrasion of the cylinder.
[0008] Accordingly, a cooling system is disposed to cool the engine
in a vehicle and the coolant is circulated to the engine through a
cooling line, the engine cooling system operates a water pump to
cool the coolant through a radiator, and the coolant passes a
cylinder block, a cylinder head, and a heater of an engine.
[0009] Here, a water jacket is formed in the cylinder block and the
coolant is circulated through the water jacket such that the
coolant cools the area of a spark plug corresponding to the
combustion chamber or the area of an exhaust port and a valve
seat.
[0010] However, a conventional engine cooling system circulates
coolant that is cooled by the radiator, and therefore it can be
hard to efficiently cool the engine.
[0011] Also, the temperature of the overall engine is increased by
the overheated combustion chamber in a high speed/high load driving
condition of the engine, the power output can be deteriorated, the
fuel consumption can be increased, and the overall durability of
the engine can be deteriorated.
[0012] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0013] Various aspects of the present invention are directed to
providing an engine cooling system for a vehicle having advantages
of having a separate cooling line as well as a main cooling line
such that main cooled coolant is circulated and supplied to an
engine according to the driving condition of the engine such that
the overheated circumference of a combustion chamber is effectively
cooled and the cooling performance of the engine is improved in a
high speed/high load driving condition.
[0014] In an aspect of the present invention, an engine cooling
system for a vehicle, may include a cooling unit that circulates
coolant through a cooling line connecting a water jacket, a water
pump, and a radiator of an engine to cool the engine, and a
sub-cooling unit that selectively circulates coolant through a
sub-cooling line connecting the engine with a refrigerator so as to
cool the engine.
[0015] The refrigerator is disposed outside the engine, wherein the
sub-cooling line may include a first line that is diverged from the
cooling line that connects the water pump with the engine and
connected to the refrigerator to supply the refrigerator with
coolant, and a second line connecting the refrigerator and a
sub-water jacket of the engine to supply the sub-water jacket with
the coolant passing through the refrigerator.
[0016] A valve is mounted in the second line between the
refrigerator and the sub-water jacket.
[0017] The valve opens the sub-cooling line to supply the sub-water
jacket with the coolant that is cooled by the refrigerator when the
engine is in a speed condition or a load condition.
[0018] The sub-water jacket may include a first connection passage
that is formed at both lateral sides in a length direction of a
cylinder head and connected to the second line of the sub-cooling
line, and at least a second connection passage that is connected to
the first connection passage and is respectively formed
corresponding to a combustion chamber.
[0019] One end side of the second connection passage is connected
to the first connection passage and the other end side thereof is
formed toward an inner side of the cylinder head, and the second
connection passage is formed vertically with regard to the first
connection passage.
[0020] The sub-water jacket may include a first connection passage
that is formed at both lateral sides in a length direction of a
cylinder head and connected to the second line of the sub-cooling
line, and at least a second connection passage that is connected to
the first connection passage and is respectively formed between
combustion chambers.
[0021] One end side of the second connection passage is connected
to the first connection passage and the other end side thereof is
formed toward an inner side of the cylinder head, and the second
connection passage is formed vertically with regard to the first
connection passage.
[0022] As described above, an engine cooling system for a vehicle
according to an exemplary embodiment of the present invention has a
separate cooling line as well as a main cooling line such that the
main coolant is circulated and supplies the cooled coolant to the
engine according to the driving condition of the engine such that
the overheated circumference of a combustion chamber is effectively
cooled and the cooling performance thereof is improved in a high
speed/high load driving condition.
[0023] Also, the engine is effectively cooled according to the
driving condition thereof to prevent overheating, to improve the
durability thereof, and to improve knocking characteristics such
that power performance and fuel efficiency of the vehicle are
improved and the overall product quality is also improved.
[0024] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 is a block diagram of an engine cooling system for a
vehicle according to an exemplary embodiment of the present
invention.
[0026] FIG. 2 is a side view of a cylinder head that is applied to
an engine cooling system for a vehicle according to an exemplary
embodiment of the present invention.
[0027] FIG. 3 is a cross-sectional view taken along the A-A line of
FIG. 2.
[0028] FIG. 4 is a perspective view of a water jacket that is
applied in a cylinder head in an engine cooling system for a
vehicle according to an exemplary embodiment of the present
invention.
[0029] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
[0030] In the figures, reference numbers refer to the same or
equivalent parts of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION
[0031] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that the present description is
not intended to limit the invention(s) to those exemplary
embodiments. On the contrary, the invention(s) is/are intended to
cover not only the exemplary embodiments, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the invention
as defined by the appended claims.
[0032] An exemplary embodiment of the present invention will
hereinafter be described in detail with reference to the
accompanying drawings.
[0033] FIG. 1 is a block diagram of an engine cooling system for a
vehicle according to an exemplary embodiment of the present
invention, FIG. 2 is a side view of a cylinder head that is applied
to an engine cooling system for a vehicle according to an exemplary
embodiment of the present invention, FIG. 3 is a cross-sectional
view taken along the A-A line of FIG. 2, and FIG. 4 is a
perspective view of a water jacket that is applied in a cylinder
head in an engine cooling system for a vehicle according to an
exemplary embodiment of the present invention.
[0034] Referring to the drawings, an engine cooling system 100 for
a vehicle according to an exemplary embodiment of the present
invention includes a main cooling line 120 through which main
coolant circulates and a separate cooling line, and supplies an
engine 110 with cooled coolant according to the operating
conditions of the engine 110 such that the area of the heated
combustion chamber is effectively cooled to improve cooling
performance in the high speed/high load driving condition.
[0035] For this, in the engine cooling system 100 for a vehicle
according to an exemplary embodiment of the present invention, as
shown in FIG. 1, the engine 110 is connected to a radiator 140
through the cooling line 120.
[0036] Also, the coolant that is cooled by the radiator 140 is
supplied to a water jacket 115 of the engine 110 including a
cylinder head 113 and a cylinder block 111 through the operation of
a water pump 130 that is disposed between the radiator 140 and the
engine 110 in the cooling line 120.
[0037] Here, the water jacket 115 is formed in the engine 110 and
the coolant is supplied to the water jacket 115 through the cooling
line 120.
[0038] A sub-cooling unit 150 includes a refrigerator 151, a
sub-cooling line 153, and a sub-water jacket 155 in the present
exemplary embodiment.
[0039] The sub-cooling line 153 includes a first line that is
connected to the cooling line 120 and a second line that is
connected to the sub-water jacket 155 of the engine 110.
[0040] Firstly, the refrigerator 151 is disposed inside a
non-illustrated engine compartment outside of the engine 100. The
refrigerator 151 includes a separate heat exchanger or an
evaporator of an air-conditioning system.
[0041] In the present exemplary embodiment, the sub-cooling line
153 diverges from the cooling line 120 that connects the water pump
130 and the engine 110, supplies the refrigerator with the coolant,
and is connected to the engine 110 to supply the sub-water jacket
155 of the engine 110 with the coolant that is cooled by the
refrigerator 151.
[0042] That is, the refrigerator 151 cools the coolant, wherein the
coolant is cooled by another cooling liquid flowing through the
refrigerator 151 such as a refrigerant.
[0043] Here, a valve 157 is disposed between the engine 110 and the
refrigerator 151 in the second line of the sub-cooling line
153.
[0044] The valve 157 opens the sub-cooling line 153 to supply the
sub-water jacket 155 with the coolant that is cooled when the
engine 110 is operated in a high speed/high load condition.
[0045] That is, the valve 157 is connected to an ECU of a
non-illustrated vehicle, selectively opens the sub-cooling line 153
that is connected to the engine 110 according to the driving
condition of the engine, and selectively supplies the engine with
the coolant that is cooled by the refrigerator 151.
[0046] Further, the sub-water jacket 155 is formed in the cylinder
head 113 of the engine 110 and is connected to the sub-cooling line
153 to supply the inside of the engine 110 with the cooled
coolant.
[0047] Here, as shown in FIG. 2 and FIG. 3, the sub-water jacket
155 includes a first connection passage 155a that is formed at both
sides of the cylinder head 113 in a length direction, and at least
one second connection passage 155b that is connected to the first
connection passage 155a and is formed corresponding to a combustion
chamber 200 of the engine 110.
[0048] In an exemplary embodiment of the present invention, at
least one second connection passage 155b may be formed between
combustion chambers 200 of the engine 110.
[0049] One end of the second connection passage 155b is connected
to the first connection passage 155a and the other end thereof is
formed toward the inside of the cylinder head 113 to be disposed in
a vertical direction with regard to the first connection passage
155a in the present exemplary embodiment.
[0050] The second connection passage 155b is formed at a lower side
of an interval of an intake port and an exhaust port corresponding
to each combustion chamber of the engine 110 such that the cooled
coolant flows through the second connection passage 155b.
[0051] For the sub-water jacket 155 that is described above, as
shown in FIG. 4, when the engine is operated in a high speed/high
load condition, if the valve 157 is operated to open the
sub-cooling line 152, the coolant flows through the first
connection passage 155a that is formed at lower both sides of the
cylinder head 113 of the engine 110.
[0052] Further, the coolant that is supplied to the first
connection passage 155a is supplied to the second connection
passage 155b that is formed at a lower side of an interval of an
intake port and an exhaust port of the water jacket 115 to
effectively cool the combustion chamber of the engine 110 such that
overheating of the engine 110 is prevented.
[0053] That is, the sub-cooling unit 150 closes the valve in a low
speed/low load condition of the engine 110 such that the coolant is
not supplied to the engine, and on the contrary, the sub-cooling
unit 150 opens the valve in a high speed/high load condition of the
engine 110 such that the coolant is supplied to the sub-water
jacket of the engine to cool the circumference of the combustion
chamber.
[0054] Accordingly, an engine cooling system 100 according to an
exemplary embodiment of the present invention additionally supplies
the coolant that is cooled depending on the driving condition of
the engine 110 to control the temperature of the intake and exhaust
ports and the combustion chamber such that the overheating of the
engine is prevented.
[0055] Therefore, if the vehicle engine cooling system 100 as
describe above is applied to an exemplary embodiment of the present
invention, the sub-cooling unit 150 as well as the cooling line 120
are disposed to circulate coolant.
[0056] Further, the coolant that is cooled depending on the driving
condition of the engine 110 is supplied to the engine 110, so the
overheating of the combustion chamber is effectively reduced in a
high speed/high load driving condition to improve the cooling
performance thereof.
[0057] Also, the engine 110 is effectively cooled according to the
driving condition of the engine and overheating of the engine is
prevented such that the durability, the fuel efficiency, the power
performance, and the overall product quality of the vehicle are
improved.
[0058] For convenience in explanation and accurate definition in
the appended claims, the terms "upper", "lower", "inner" and
"outer" are used to describe features of the exemplary embodiments
with reference to the positions of such features as displayed in
the figures.
[0059] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *