US20090183696A1 - Liquid cooling system for internal combustion engine - Google Patents

Liquid cooling system for internal combustion engine Download PDF

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Publication number
US20090183696A1
US20090183696A1 US12/016,500 US1650008A US2009183696A1 US 20090183696 A1 US20090183696 A1 US 20090183696A1 US 1650008 A US1650008 A US 1650008A US 2009183696 A1 US2009183696 A1 US 2009183696A1
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US
United States
Prior art keywords
valve
bypass
coolant
cooling system
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/016,500
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English (en)
Inventor
Kevin P. O'Flynn
Jody M. Slike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to US12/016,500 priority Critical patent/US20090183696A1/en
Assigned to FORD GLOBAL TECHNOLOGIES, LLC reassignment FORD GLOBAL TECHNOLOGIES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: O'FLYNN, KEVIN P., SLIKE, JODY M.
Priority to DE102009003894A priority patent/DE102009003894A1/de
Priority to CN200910003648.3A priority patent/CN101487415B/zh
Publication of US20090183696A1 publication Critical patent/US20090183696A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01P2070/00—Details

Definitions

  • This disclosure relates to a liquid cooling system for a reciprocating internal combustion engine.
  • Automotive internal combustion engines operate in a variety of temperature extremes.
  • the first duty of a cooling system is to maintain the engine's operating temperature within a fairly narrow range. As exhaust emission control requirements tighten, this function has increased in importance.
  • the cooling system desirably provides rapid warm up of the engine so as to provide heat to the passenger cabin of a vehicle as quickly as possible.
  • coolant is circulated through a bypass, which allows the coolant to move through the engine without passing through the air-to-liquid heat exchanger, commonly termed a radiator. Once the engine attains the desired operating temperature, flow through the radiator is initiated.
  • a liquid cooling system for an internal combustion engine includes a coolant pump, an air-to-liquid heat exchanger, and a bypass loop for allowing coolant to circulate from the coolant pump to the engine without passing through the heat exchanger.
  • a thermostat housing is operatively connected with the coolant pump, as well as with the heat exchanger and the bypass loop.
  • a thermostatic valve mounted within the thermostat housing includes a temperature-responsive primary valve element for controlling the flow of coolant between the coolant pump and the heat exchanger and a bypass flow control coupled to the primary valve element for controlling the flow of coolant through the bypass.
  • the bypass flow control includes a resiliently-loaded valve disc having a conical, annular sealing surface configured for linear contact with the valve seat.
  • the valve disc further includes a number of continuously open bypass orifices formed in the valve disc.
  • the valve disc is itself mounted upon a stem extending from a temperature-responsive element which operates the primary valve element.
  • the thermostatic valve has at least a first position in which the primary valve element is closed and the bypass flow control is open to a maximum extent and a second position in which the primary valve element is open and the bypass flow control is open to a minimum extent.
  • a bypass flow control includes a valve disc having a conical, annular sealing surface configured for linear contact with a valve seat incorporated within the thermostat housing.
  • the bypass flow control includes a spring-loaded valve disc with a frustoconical, annular sealing surface configured for wedging contact with the thermostat housing's valve seat.
  • thermostatic valve will exhibit superior durability characteristics as compared with prior art valves.
  • FIG. 1 is an exploded perspective view of a V-block engine having a cooling system according to the present invention.
  • FIG. 2 is a sectional view of a thermostatic valve according to an aspect of the present invention.
  • the valve of FIG. 2 is in the closed position with respect to flow through the engine's radiator, but with the bypass flow control being in the open position.
  • FIG. 3 is similar to FIG. 2 , but shows the primary valve element of the thermostatic valve in the open position, allowing flow through the engine's radiator, but with the bypass flow control being in a closed position, in which only liquid flowing through the bypass flows through a series of orifices.
  • engine 10 has a cylinder block, 11 , upon which a pair of cylinder heads, 12 , are mounted, with only one of cylinder heads 12 being shown.
  • Engine 10 also includes a coolant pump, 14 , a coolant crossover, 16 , an air-to-liquid heat exchanger (“radiator”) 18 , and a series of hoses. Coolant circulates generally from water pump 14 through cylinder block 11 and up through cylinder heads 12 . After moving through cylinder heads 12 , coolant flows into thermostat housing 26 which, as its name implies, provides a mounting place for thermostatic valve 34 , including a bypass valve seat, 72 ( FIGS. 2 and 3 ). When thermostatic valve 34 is in the open position shown in FIG.
  • coolant flows up through thermostatic valve 34 and then through coolant outlet 30 and upper radiator hose 20 , and then into radiator 18 .
  • the cooled fluid then moves through lower radiator hose 24 and then through water pump 14 . Leaving water pump 14 , the fluid flows back through cylinder block 11 , as described above.
  • thermostatically responsive valve 34 When engine 10 is below the desired operating temperature, thermostatically responsive valve 34 will not allow coolant to flow through radiator hose 20 and into radiator 18 . Rather, coolant flows through a bypass loop, 22 , which is shown as including a passageway to and from water pump 14 and through cylinder heads 12 and cylinder block 11 , but without including flow through radiator 18 .
  • This bypass flow allows engine 10 to warm up more rapidly.
  • the lower temperature condition of valve 34 is shown in FIG. 2 , wherein valve 34 is closed insofar as flow to radiator 18 is concerned.
  • primary valve 46 is maintained in contact with valve cage 50 by means of primary spring 54 .
  • FIG. 2 also shows resiliently-loaded bypass valve disc 58 , which is slidingly mounted upon stem 52 , as being in a fully open position. This allows maximum flow through bypass loop 22 .
  • Primary valve element 38 has a temperature-responsive motor in the form of wax pellet motor 42 , which has a plunger 44 .
  • wax pellet motor 42 When engine 10 is cold, wax pellet motor 42 is in a retracted position, allowing primary valve element 46 to shut off flow to radiator 18 .
  • plunger 44 now extends from wax pellet motor 42 , with the result that primary valve element 46 has now been displaced from valve cage 50 , thereby allowing flow through water outlet 30 and through upper radiator hose 20 to radiator 18 .
  • valve disc 58 frustoconical, annular sealing surface 64 of valve disc 58 is not in contact with valve seat 72 , thereby allowing bypass flow through bypass loop 22 and, therefore, rapid warm up of engine 10 .
  • FIG. 3 it is seen that with the action of wax pellet motor 42 and, particularly, plunger 44 , bypass valve disc 58 has now been resiliently pressed into contact with valve seat 72 , such that the force of spring 62 maintains frustoconical sealing surface 64 in contact with valve seat 72 .
  • thermostatic valve element 34 When thermostatic valve element 34 is in the position shown in FIG. 3 , minimal flow is allowed through bypass orifices 68 which are formed in bypass valve disc 58 . Orifices 68 are important because they would permit minimum flow through engine 10 even if thermostatic valve element 34 were to malfunction and not open correctly. Orifices 68 also help to provide a “soft” temperature transition strategy by preventing valve disc 58 from closing too quickly. Moreover, frustoconical sealing surface 64 helps to prevent valve disc 58 from closing in an unstable manner by mitigating the pressure forces acting upon valve disc 58 . In turn, this enhances the durability of thermostatic valve element 34 .
  • wax pellet motor 42 functions as a thermally responsive linear actuator which positions bypass valve disc 58 against seat 72 .
  • bypass valve disc 58 is maintained in contact with seat 72 by bypass spring 62 , which functions as a resilient member.
  • thermostatic valve element 34 is illustrated as having a first position in which primary valve element 46 is closed and bypass flow control disc 58 is open, and a second position in which primary valve element 46 is open and bypass flow control disc 58 is open to a minimum extent while closed against seat 72 , other types of thermostatic control devices may employ the present temperature-responsive primary valve element and bypass valve disc in multiple locations or operational configurations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
US12/016,500 2008-01-18 2008-01-18 Liquid cooling system for internal combustion engine Abandoned US20090183696A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/016,500 US20090183696A1 (en) 2008-01-18 2008-01-18 Liquid cooling system for internal combustion engine
DE102009003894A DE102009003894A1 (de) 2008-01-18 2009-01-02 Flüssigkeitskühlsystem für einen Motor mit innerer Verbrennung
CN200910003648.3A CN101487415B (zh) 2008-01-18 2009-01-13 内燃发动机的液体冷却系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/016,500 US20090183696A1 (en) 2008-01-18 2008-01-18 Liquid cooling system for internal combustion engine

Publications (1)

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US20090183696A1 true US20090183696A1 (en) 2009-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/016,500 Abandoned US20090183696A1 (en) 2008-01-18 2008-01-18 Liquid cooling system for internal combustion engine

Country Status (3)

Country Link
US (1) US20090183696A1 (zh)
CN (1) CN101487415B (zh)
DE (1) DE102009003894A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3016198A1 (fr) * 2014-01-09 2015-07-10 Vernet Vanne thermostatique
US20170198626A1 (en) * 2014-11-03 2017-07-13 Bayerische Motoren Werke Aktiengesellschaft Thermostat Valve
US10866603B2 (en) 2014-10-21 2020-12-15 Ford Global Technologies, Llc Wax thermostat
US11541727B2 (en) * 2016-12-02 2023-01-03 Carrier Corporation Cargo transport heating system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110051832A (ko) * 2009-11-11 2011-05-18 현대자동차주식회사 워터펌프를 구비한 엔진
KR101684079B1 (ko) * 2014-12-08 2016-12-07 현대자동차주식회사 엔진의 온도 제어장치
KR101646441B1 (ko) * 2015-01-29 2016-08-05 현대자동차주식회사 차량의 aaf 및 ets 통합 제어방법 및 제어장치

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052965A (en) * 1975-10-28 1977-10-11 Caterpillar Tractor Co. Engine cooling system vent means
US4273081A (en) * 1979-08-27 1981-06-16 Caterpillar Tractor Co. Vent valve for engine cooling systems
US4288031A (en) * 1977-12-13 1981-09-08 Daimler-Benz Aktiengesellschaft Thermostatic control valve
US4288033A (en) * 1978-07-17 1981-09-08 Century Brass Products, Inc. Control valve assembly
US4856711A (en) * 1987-05-13 1989-08-15 Navistar International Transportation Corp. Double seal thermostat
US4895301A (en) * 1988-03-09 1990-01-23 Robertshaw Controls Company Engine coolant system and method of making the same
US5011074A (en) * 1990-07-20 1991-04-30 Lawler Manufacturing Co., Inc. Thermostatic mixing valve with thermostat failure compensation
US5038724A (en) * 1990-04-16 1991-08-13 Outboard Marine Corporation Debris resistant valve assembly
US5690276A (en) * 1996-10-31 1997-11-25 Caltherm Two stage thermostatic valve device
US5934553A (en) * 1997-08-08 1999-08-10 Chrysler Corporation Thermostatic valve
US6065682A (en) * 1998-03-31 2000-05-23 Behr Thermot- Tronik Gmbh & Co. Thermostatic valve
US6662761B1 (en) * 1999-08-18 2003-12-16 Robert Bosch Gmbh Method for regulating the temperature of the coolant in an internal combustion engine using an electrically operated coolant pump
US6928995B1 (en) * 2004-02-24 2005-08-16 Siemens Vdo Automotive, Inc. Emission control valve having improved force-balance and anti-coking
US6953026B2 (en) * 2003-10-16 2005-10-11 Visteon Global Technologies, Inc. Pressure regulating valve for automotive fuel system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07139350A (ja) * 1993-11-12 1995-05-30 Giichi Kuze 内燃機関の冷却システム
TW394817B (en) * 1998-04-03 2000-06-21 Yoshikazu Kuse Cooling system for an automotive engine
JP4357693B2 (ja) * 2000-04-17 2009-11-04 本田技研工業株式会社 水冷式内燃機関の冷却水通路構造
JP3775571B2 (ja) * 2001-05-15 2006-05-17 本田技研工業株式会社 冷却水出入口カバーを備える内燃機関
JP4278131B2 (ja) * 2003-04-04 2009-06-10 本田技研工業株式会社 水冷式内燃機関の冷却構造
CN2844455Y (zh) * 2005-11-14 2006-12-06 昆明云内动力股份有限公司 一种发动机水泵

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052965A (en) * 1975-10-28 1977-10-11 Caterpillar Tractor Co. Engine cooling system vent means
US4288031A (en) * 1977-12-13 1981-09-08 Daimler-Benz Aktiengesellschaft Thermostatic control valve
US4288033A (en) * 1978-07-17 1981-09-08 Century Brass Products, Inc. Control valve assembly
US4273081A (en) * 1979-08-27 1981-06-16 Caterpillar Tractor Co. Vent valve for engine cooling systems
US4856711A (en) * 1987-05-13 1989-08-15 Navistar International Transportation Corp. Double seal thermostat
US4895301A (en) * 1988-03-09 1990-01-23 Robertshaw Controls Company Engine coolant system and method of making the same
US5038724A (en) * 1990-04-16 1991-08-13 Outboard Marine Corporation Debris resistant valve assembly
US5011074A (en) * 1990-07-20 1991-04-30 Lawler Manufacturing Co., Inc. Thermostatic mixing valve with thermostat failure compensation
US5690276A (en) * 1996-10-31 1997-11-25 Caltherm Two stage thermostatic valve device
US5934553A (en) * 1997-08-08 1999-08-10 Chrysler Corporation Thermostatic valve
US6065682A (en) * 1998-03-31 2000-05-23 Behr Thermot- Tronik Gmbh & Co. Thermostatic valve
US6662761B1 (en) * 1999-08-18 2003-12-16 Robert Bosch Gmbh Method for regulating the temperature of the coolant in an internal combustion engine using an electrically operated coolant pump
US6953026B2 (en) * 2003-10-16 2005-10-11 Visteon Global Technologies, Inc. Pressure regulating valve for automotive fuel system
US6928995B1 (en) * 2004-02-24 2005-08-16 Siemens Vdo Automotive, Inc. Emission control valve having improved force-balance and anti-coking

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3016198A1 (fr) * 2014-01-09 2015-07-10 Vernet Vanne thermostatique
WO2015104325A1 (fr) * 2014-01-09 2015-07-16 Vernet Vanne thermostatique
US10408117B2 (en) 2014-01-09 2019-09-10 Vernet Thermostatic valve
US10866603B2 (en) 2014-10-21 2020-12-15 Ford Global Technologies, Llc Wax thermostat
US20170198626A1 (en) * 2014-11-03 2017-07-13 Bayerische Motoren Werke Aktiengesellschaft Thermostat Valve
US10669921B2 (en) * 2014-11-03 2020-06-02 Bayerische Motoren Werke Aktiengesellschaft Thermostat valve
US11541727B2 (en) * 2016-12-02 2023-01-03 Carrier Corporation Cargo transport heating system

Also Published As

Publication number Publication date
CN101487415B (zh) 2013-04-10
CN101487415A (zh) 2009-07-22
DE102009003894A1 (de) 2009-08-06

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AS Assignment

Owner name: FORD GLOBAL TECHNOLOGIES, LLC, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:O'FLYNN, KEVIN P.;SLIKE, JODY M.;REEL/FRAME:020386/0339

Effective date: 20080117

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION