GB2378240A - An engine cooling system having an auxiliary heat exchanger - Google Patents

An engine cooling system having an auxiliary heat exchanger Download PDF

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Publication number
GB2378240A
GB2378240A GB0118720A GB0118720A GB2378240A GB 2378240 A GB2378240 A GB 2378240A GB 0118720 A GB0118720 A GB 0118720A GB 0118720 A GB0118720 A GB 0118720A GB 2378240 A GB2378240 A GB 2378240A
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United Kingdom
Prior art keywords
heat exchanger
coolant
matrix
chamber
liquid
Prior art date
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Granted
Application number
GB0118720A
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GB0118720D0 (en
GB2378240B (en
Inventor
William Richard Hutchins
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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Filing date
Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to GB0118720A priority Critical patent/GB2378240B/en
Publication of GB0118720D0 publication Critical patent/GB0118720D0/en
Publication of GB2378240A publication Critical patent/GB2378240A/en
Application granted granted Critical
Publication of GB2378240B publication Critical patent/GB2378240B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0461—Combination of different types of heat exchanger, e.g. radiator combined with tube-and-shell heat exchanger; Arrangement of conduits for heat exchange between at least two media and for heat exchange between at least one medium and the large body of fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/182—Arrangements or mounting of liquid-to-air heat-exchangers with multiple heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P2007/168—By varying the cooling capacity of a liquid-to-air heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/02—Marine engines
    • F01P2050/06—Marine engines using liquid-to-liquid heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/10—Fuel manifold
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

An engine cooling system for the circulation of a liquid coolant through an engine comprises a main heat exchanger for cooling the coolant, and an auxiliary, liquid to liquid heat exchanger 34 by which a second liquid such as fuel or oil can be cooled by the coolant. The auxiliary heat exchanger 34 has a heat exchanger matrix 41 within a heat exchanger chamber 44, an inlet chamber 49 at one end of the heat exchanger matrix 41 which has an inlet 47 for incoming coolant, an outlet chamber 56 at the other end of the heat exchange matrix 41 which has an outlet for outgoing coolant, and a thermostat 61 in the outlet chamber 56 to regulate the flow of coolant through the heat exchanger matrix 41. The inlet 47 comprises a jet 75 which directs coolant directly towards the heat exchanger matrix 41 and in the direction of the thermostat 61. The jet 75 may comprise an insert 71 having a bore of reduced diameter acting as a flow restrictor. The heat exchanger matrix 41 comprises a number of heat exchange tubes extending between the inlet chamber 49 and the outlet chamber 56. In an alternative embodiment the invention comprises an auxiliary, liquid to liquid heat exchanger 34 for an engine cooling system.

Description

<Desc/Clms Page number 1>
An Engine Cooliner System This invention relates to cooling systems for internal combustion engines.
In a conventional water-cooled engine, the water-based coolant is pumped through the cylinder block and fed to a radiator before being returned to the engine at a lower temperature. Typically, during normal operation, the temperature of the coolant is reduced during its passage through the radiator by approximately 10 C, the coolant entering the radiator at approximately 110 C and leaving it at approximately 100 C.
Sometimes a need arises for coolant at a distinctly lower temperature than that required to cool the engine such as for the cooling of the fuel supplied to the engine, the engine oil or transmission oil. An arrangement to provide this for a fuel cooler is described in WO-A-97/33078. The fuel cooler has longitudinally extending heat exchange tubes sealed within a chamber. Cold coolant can flow in from one end of the chamber and exit the other end past a thermostat. A problem with such an arrangement can occur when the thermostat opens and cold coolant starts to flow into the chamber. There is a tendency for the cold coolant to sink to the bottom of the chamber and travel only slowly towards the thermostat, arriving as a cold mass of appreciable volume which then cools the thermostat and closes it again. There is then a stagnant volume of cold coolant which has to be heated by the fuel before the thermostat can re-open and coolant can again flow through the fuel cooler. This process then tends to repeat itself, which can cause cycling of the temperatures in the cooling system with the possibility of failure due to stress cycling.
It is an object of the invention to alleviate the abovementioned problem.
<Desc/Clms Page number 2>
According to one aspect of the invention, there is provided an engine cooling system for the circulation of a liquid coolant through an engine and having a main heat exchanger for cooling the coolant, a bypass passage for the circulation of coolant which bypasses the main heat exchanger, a bypass thermostat valve to regulate the flow of coolant through the radiator and an auxiliary, liquid to liquid, heat exchanger by which a second liquid can be cooled by the coolant, the auxiliary heat exchanger having a heat exchanger matrix within a heat exchanger chamber, an inlet chamber at one end of the heat exchanger matrix, the inlet chamber having an inlet for incoming coolant, an outlet chamber at the other end of the heat exchange matrix, the outlet chamber having an outlet for outgoing coolant, and a thermostat in the outlet chamber to regulate the flow of coolant through the heat exchanger matrix, wherein the inlet comprises a jet which directs coolant directly towards the heat exchanger matrix and in the direction of the thermostat.
According to another aspect of the invention, there is provided an auxiliary, liquid to liquid, heat exchanger for an engine cooling system of the kind in which a liquid coolant is circulated through the engine, the cooling system having a main heat exchanger for cooling the coolant, a bypass passage for the circulation of coolant which bypasses the main heat exchanger and a bypass thermostat valve to regulate the flow of coolant through the radiator, the auxiliary heat exchanger enabling a second liquid to be cooled by the coolant and comprising a heat exchanger matrix within a heat exchanger chamber, an inlet chamber at one end of the heat exchanger matrix, the inlet chamber having an inlet for incoming coolant, an outlet chamber at the other end of the heat exchange matrix, the outlet chamber having an outlet for outgoing coolant, and a thermostat in the outlet chamber to regulate the flow of coolant through the heat exchanger matrix, wherein the inlet comprises a jet which directs coolant directly towards the heat exchanger matrix and in the direction of the thermostat.
<Desc/Clms Page number 3>
Conveniently, the jet comprises an insert having a bore of reduced diameter at an end adjacent the heat exchanger matrix, in which case the insert may be inserted into a hose connection and have a flange which in use is retained by the hose.
The heat exchange matrix may comprise a number of heat exchange tubes extending between the inlet chamber and the outlet chamber.
Preferably, the jet acts as a flow restrictor to restrict the flow of coolant through the auxiliary heat exchanger.
The invention will now be described by way of example with reference to the accompanying drawing of which :- Fig. 1 is a schematic diagram showing an engine cooling circuit according to the invention; and Fig. 2 is a cross-section through a liquid to liquid heat exchanger shown in Fig. l.
With particular reference to Fig. 1, there is shown a main, liquid to air, heat exchanger in the form of a radiator 11 forming part of a cooling system for a Diesel engine 12. The radiator 11 is a cross-flow type having an inlet tank 13 and an outlet tank 16. The inlet tank has a hot inlet 14 connected to the engine 12 through a delivery passage 15 and the outlet tank 16 has a baffle 17 which divides it into a main section 18 and a lower section 19. Heat exchanger tubes 21 connect the inlet tank 13 to the outlet tank 16 to provide cooling, the lower group of tubes, typically six, being connected to the outlet tank lower section 19'and the remainder being connected to the main section 18. A main outlet 22 connects the outlet tank main section 18 to the engine 12 through a radiator return passage 23, a bypass thermostat valve 24, a pump return passage 26 and a pump 27.
<Desc/Clms Page number 4>
An expansion tank 28 is connected by a pipe 29 between the delivery passage 15 and the pump return passage 26 to allow for the expansion of coolant as it is heated from a normal ambient temperature to its normal operating temperature.
A bypass passage 31 is connected between the delivery passage 15 and the bypass thermostat valve 24 to allow for the circulation of coolant through the engine 12 to assist with rapid warm up of the engine and to regulate the coolant temperature in the engine during normal operation.
The outlet tank lower section 19 has an auxiliary outlet 32 which is connected to the pump return passage 26 through an auxiliary, liquid to liquid, heat
excl'k P-rm of I n n'in mnr exchanger in the form of a fuel cooler 34 which is shown in more detail in Fig. 2 The fuel cooler 34 is a contra-flow parallel tube type having a heat exchanger matrix comprising a number (typically 37) of longitudinally extending heat exchanger tubes 41 held in position by two end plates 42,43 sealed within a chamber 44 defined by a cylindrical wall 45 forming the body of the fuel cooler 34.
The cylindrical wall 45 is swaged over at one end to retain a first plastic end cap 46 having an inlet 47 for a hose 48 connecting the heat exchanger 34 to the radiator auxiliary outlet 32. A coolant inlet chamber 49 is formed by the first plastic end cap 46 and the adjacent end plate 42.
At the other end of the fuel cooler 34 the cylindrical wall 45 is swaged over to retain a second plastic end cap 51 which has an outlet 52 for connection to the pump return passage 26 through a cooler return passage 53 and an inlet 54 for a heater return passage 55 from a passenger compartment heater 55. A coolant outlet chamber 56 is formed by the second plastic end cap 51 and the adjacent end plate 43.
A thermostat 61 is located within the second end cap 51 and has a temperature sensitive body 62 urged by a return spring 63 towards a seat in the
<Desc/Clms Page number 5>
form of an elastomeric seal 64 attached to part of the inner surface of the end cap 51. A plate type circlip or snap ring 65 is secured in the bore of the second end cap 51 to provide an abutment for the thermostat return spring 63. A pin 66 extends from the thermostat body 62 and reacts against the end cap 51.
The inlet 47 in the end cap 46 has a metal insert 71 having a flange 72 which can abut the outer end face of the inlet 47, a relatively large diameter tubular section 73 and an end wall 74 with an axial passage or jet 75 of reduced diameter (typically 2.10 mm). The insert 71 is a push fit in the end cap 46 but is also retained by the hose 48.
The fuel to be cooled is supplied to the fuel cooler by means of a supply pipe 81 which is connected to part of the fuel system (not shown) of the engine 12. The fuel enters the fuel cooler 34 through an inlet port 82 and passes into the chamber 44 surrounding the heat transfer-tubes 41, flowing in the direction towards the coolant inlet 47 to exit the chamber 61 through an outlet port 83. The cooled fuel is then returned by a return pipe 84 to the fuel system.
In use the pump 27 forces coolant through the engine 12 and out through the delivery passage 15, coolant returning to the pump from the bypass thermostat valve 24 and the pump return passage 26. The flow through the bypass 31 and the radiator 11 is regulated in a known manner by the bypass thermostat valve 24 as described, for example, in EP-A-0 794 327.
When the engine 30 is started from cold the thermostat 61 will be closed and no coolant will flow through the fuel cooler 34. As the temperature of the fuel passing through the chamber 61 increases it will increase the temperature of the coolant in the tubes 71 and also in the outlet chamber 56 surrounding the thermostat body 62. When the temperature of the secondary coolant reaches a
<Desc/Clms Page number 6>
predetermined temperature, the thermostat 61 opens, the thermostat body 62 moving away from the resilient seal 64 against the action of the return spring 63. Coolant can now begin to flow through the fuel cooler 34 from the radiator auxiliary outlet 32 The temperature of the coolant supplied to the fuel cooler 34 through the hose 48 is considerably lower than that returning to the engine from the bypass thermostat valve 24 or even that from the radiator main outlet 22 when the engine is warmed up and on maximum power. This is due to the jet 75 acting as a flow restrictor and the fact that the coolant passes through the lower tubes of the
A-*-I I r-. the I-IN radiator 11 from the lower end of the inlet tank 13. This helps to keep the temperature of the fuel below approximately 80 ? C so that the fuel system operates efficiently.
During normal operation cold coolant enters the fuel cooler 34 through the inlet chamber 49, passes through the heat transfer tubes 41 where it is warmed by the fuel and enters the outlet chamber 56 where its temperature is sensed by the thermostat body 62. The pin 66 then extends or retracts to open and close the thermostat 61 as appropriate so that the temperature of the coolant flowing through the outlet chamber 56 and past the thermostat 61 is substantially constant. This also ensures that the temperature of the fuel leaving the outlet port 83 is also substantially constant.
In addition to acting as a restrictor, the jet 75 has an important function in the operation of the fuel cooler 34 and the cooling system in general. Hitherto, it has been found that when the thermostat 61 opens and cold coolant starts to flow into the inlet chamber 49 and through the tubes 41, there is a tendency for the cold coolant to sink to the bottom of the cylindrical chamber 44 and to travel only slowly towards the outlet chamber 56. It then arrives at the thermostat body 62 as
<Desc/Clms Page number 7>
a cold mass of appreciable volume which then cools the thermostat body 62 and closes the thermostat 61. This stagnant volume then has to be heated by the fuel before the thermostat 61 can re-open and coolant can again flow through the fuel cooler 34. This process tends to repeat itself, which can cause cycling of the temperatures in the radiator 11 with the possibility of failure due to stress cycling.
This phenomenon is exacerbated by the fact that a Diesel engine is very fuel efficient and in a vehicle travelling at moderate cruising speeds there is only a very small flow from the radiator return 23 passage.
In the present arrangement, the jet 75 directs a stream of incoming coolant towards the central bundle of heat exchanger tubes 41 and this stream of coolant tends to flow directly through the tubes and onto the thermostat body 62. In this way, the thermostat 61 can start to operate almost as soon as the coolant starts to flow through the fuel cooler 34 and there is little or no temperature cycling. The jet 75 also helps to distribute flow-within the inlet and outlet chambers 49 and 56.
It should be noted that the jet is positioned fairly close to the end wall 42 and hence the adjacent ends of the tubes 41 and it has been found that the effect of the jet is reduced if this distance is increased unduly.
Although the invention has been described with reference to its use to cool fuel it could be used for other uses such as for cooling oil or any other similar purpose. Other types of liquid to liquid heat exchanger may be used instead of the multi tube type described above

Claims (12)

  1. CLAIMS 1. An engine cooling system for the circulation of a liquid coolant through an engine and having a main heat exchanger for cooling the coolant, a bypass passage for the circulation of coolant which bypasses the main heat exchanger, a bypass thermostat valve to regulate the flow of coolant through the radiator and an auxiliary, liquid to liquid, heat exchanger by which a second liquid can be cooled by the coolant, the auxiliary heat exchanger having a heat exchanger matrix within a heat exchanger chamber, an inlet chamber at one end of the heat exchanger matrix, the inlet chamber having an inlet for incoming coolant, an outlet chamber at the other end of the heat exchange matrix, the outlet chamber having an outlet for outgoing coolant, and a thermostat in the outlet chamber to regulate the flow of coolant through the heat exchanger matrix, wherein the inlet comprises a jet which directs coolant directly towards the heat exchanger matrix and in the direction of the thermostat.
  2. 2. An engine cooling system as claimed in claim 1 in which the jet comprises an insert having a bore of reduced diameter at an end adjacent the heat exchanger matrix.
  3. 3. An engine cooling system as claimed in claim 2 in which the insert is inserted into a hose connection and has a flange which in use is retained by the hose.
  4. 4. An engine cooling system as claimed in any preceding claim in which the heat exchange matrix comprising a number of heat exchange tubes extending between the inlet chamber and the outlet chamber.
    <Desc/Clms Page number 9>
  5. 5. An engine cooling system as claimed in any preceding claim in which the jet acts as a flow restrictor to restrict the flow of coolant through the auxiliary heat exchanger.
  6. 6. An auxiliary, liquid to liquid, heat exchanger for an engine cooling system of the kind in which a liquid coolant is circulated through the engine, the cooling system having a main heat exchanger for cooling the coolant, a bypass passage for the circulation of coolant which bypasses the main heat exchanger and a bypass thermostat valve to regulate the flow of coolant through the radiator, the auxiliary heat exchanger enabling a second liquid to be cooled by the coolant and comprising a heat exchanger matrix within a heat exchanger chamber, an inlet chamber at one end of the heat exchanger matrix, the inlet chamber having an inlet for incoming coolant, an outlet chamber at the other end of the heat exchange matrix, the outlet chamber having an outlet for outgoing coolant, and a thermostat in the outlet chamber to regulate the flow of coolant through the heat exchanger matrix, wherein the inlet comprises a jet which directs coolant directly towards the heat exchanger matrix and in the direction of the thermostat.
  7. 7. An auxiliary heat exchanger as claimed in claim 6 in which the jet comprises an insert having an small-diameter bore at an end adjacent the heat exchanger matrix.
  8. 8. An auxiliary heat exchanger as claimed in claim 7 in which the insert is inserted into a hose connection and has a flange which in use is retained by the hose.
    <Desc/Clms Page number 10>
  9. 9. An auxiliary heat exchanger as claimed in any of claims 6 to 8 in which the heat exchange matrix comprising a number of heat exchange tubes extending between the inlet chamber and the outlet chamber.
  10. 10. An auxiliary heat exchanger as claimed in any of claims 6 to 9 in which the jet acts as a flow restrictor to restrict the flow of coolant through the auxiliary heat exchanger.
  11. 11. An engine cooling system substantially as described herein with reference to Figs. 2 and 3 of the accompanying drawings.
  12. 12. An auxiliary heat exchanger substantially as described herein with reference to Figs. 2 and 3 of the accompanying drawings.
GB0118720A 2001-08-01 2001-08-01 An engine cooling system Expired - Fee Related GB2378240B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0118720A GB2378240B (en) 2001-08-01 2001-08-01 An engine cooling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0118720A GB2378240B (en) 2001-08-01 2001-08-01 An engine cooling system

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GB0118720D0 GB0118720D0 (en) 2001-09-26
GB2378240A true GB2378240A (en) 2003-02-05
GB2378240B GB2378240B (en) 2005-05-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140290923A1 (en) * 2013-04-01 2014-10-02 Caterpillar Inc. Cooling system
CN105371990A (en) * 2015-11-23 2016-03-02 上海卫星装备研究所 Heat pipe type multi-point high-precision thermostatic well device and application thereof
CN110080881A (en) * 2019-01-18 2019-08-02 西北工业大学 A kind of integrated heat-exchange device for realizing secondary heat exchange
DE102007052263B4 (en) 2007-11-02 2021-11-04 Bayerische Motoren Werke Aktiengesellschaft Thermostatic valve assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309075A (en) * 1996-01-12 1997-07-16 Rover Group An engine cooling system incorporating an oil cooler assembly
WO1997033078A1 (en) * 1996-03-06 1997-09-12 Rover Group Limited An engine and a cooling system therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309075A (en) * 1996-01-12 1997-07-16 Rover Group An engine cooling system incorporating an oil cooler assembly
WO1997033078A1 (en) * 1996-03-06 1997-09-12 Rover Group Limited An engine and a cooling system therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Online (PAJ) abstract for JP030279613 A *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007052263B4 (en) 2007-11-02 2021-11-04 Bayerische Motoren Werke Aktiengesellschaft Thermostatic valve assembly
US20140290923A1 (en) * 2013-04-01 2014-10-02 Caterpillar Inc. Cooling system
CN105371990A (en) * 2015-11-23 2016-03-02 上海卫星装备研究所 Heat pipe type multi-point high-precision thermostatic well device and application thereof
CN110080881A (en) * 2019-01-18 2019-08-02 西北工业大学 A kind of integrated heat-exchange device for realizing secondary heat exchange

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Publication number Publication date
GB0118720D0 (en) 2001-09-26
GB2378240B (en) 2005-05-18

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