EP1404950B1 - Kühlungssystem für eine brennkraftmaschine eines kraftfahrzeugs - Google Patents

Kühlungssystem für eine brennkraftmaschine eines kraftfahrzeugs Download PDF

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Publication number
EP1404950B1
EP1404950B1 EP02735601A EP02735601A EP1404950B1 EP 1404950 B1 EP1404950 B1 EP 1404950B1 EP 02735601 A EP02735601 A EP 02735601A EP 02735601 A EP02735601 A EP 02735601A EP 1404950 B1 EP1404950 B1 EP 1404950B1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
engine
flow
coolant
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.)
Expired - Fee Related
Application number
EP02735601A
Other languages
English (en)
French (fr)
Other versions
EP1404950A1 (de
Inventor
Ian Graham Pegg
Leslie Williams Routledge
Richard Durnford
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
Publication of EP1404950A1 publication Critical patent/EP1404950A1/de
Application granted granted Critical
Publication of EP1404950B1 publication Critical patent/EP1404950B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • 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
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/13—Ambient temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/33—Cylinder head temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/64—Number of revolutions
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/66—Vehicle speed
    • 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
    • F01P2070/06—Using intake pressure as actuating fluid
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • 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
    • F01P7/161—Controlling of coolant flow the coolant being liquid by thermostatic control by bypassing pumps

Definitions

  • This invention relates to cooling systems for internal combustion engines, particularly for motor vehicles.
  • a typical automobile engine cooling system includes an engine coolant jacket, a radiator, a fan for drawing air through the radiator, a circulatory pump for circulating the coolant from the engine through the radiator and return.
  • Such a system typically includes a thermostat which opens to allow the circulation of the coolant when the engine reaches a minimum desired operating temperature.
  • the coolant flow is driven conventionally by a pump rotated by a belt driven by the crankshaft pulley and the flow rate is dependant upon engine speed.
  • US-A-5 975 031 discloses a cooling system having a pump with an electrically driven motor the speed of which is varied with engine temperature.
  • the system in US-A-5 975 031 also includes a radiator by-pass duct and discloses the use of a control valve upstream of the pump to control the ratio of the flows of water entering the pump from both the by-pass duct and radiator.
  • US-A-6 032 618 discloses a cooling system in which a control valve located upstream of the pump controls the flow of water through the system dependant upon signals received from an electronic control.
  • a motor vehicle internal combustion engine cooling system according to the preamble of claim 1 is disclosed in DE 4 033 261 A.
  • the present invention provides a means of controlling the engine cooling system which is suitable for engine driven coolant pumps.
  • a motor vehicle internal combustion engine cooling system comprising a pump having an inlet for receiving coolant from a radiator or other coolant circuit and outlet directing coolant to the engine, the outlet having a flow restricting valve therein operable to vary the output from the pump, characterized by a control module for processing the valve condition and a plurality of other engine and vehicle conditions to determine a required coolant flow rate, and for increasing or decreasing the flow through the valve accordingly.
  • the flow restricting valve in the outlet of the pump creates a restriction at the outlet which has advantages in that cavitation at the inlet is not made worse and any increase in pressure due to the restriction is seen only in the pump and not in the rest of the coolant system.
  • Increasing the flow restriction at the outlet of an impeller type pump reduces its power consumption giving a direct reduction in fuel consumption.
  • the flow restricting valve may be provided with an actuator, preferably a vacuum operated actuator which operates from a vacuum source on the vehicle, e.g. a vacuum pump or the engine inlet manifold pressure.
  • the flow restricting valve may also be provided with a sensor which monitors the control position of the valve.
  • the pump could be an electrically driven impeller pump, but is preferably a mechanically driven impeller pump having a pulley wheel fixed to the pump shaft and driven by a suitable means e.g. endless belt, chain etc., connected to a pulley wheel fixed to the engine crankshaft.
  • the system drive losses as compared with an electrically driven pump are lower. With a typical electrically driven pump the vehicle alternator must be upgraded and system losses are such the power consumed to drive the coolant pump is about 120% higher than for the engine driven pump.
  • the pump may be a separate unit mounted on the engine or a pump which is incorporated with its impeller located in the engine coolant jacket.
  • the module may be connected to a plurality of sensors for monitoring the plurality of engine conditions, and preferably vehicle passenger compartment conditions.
  • Yet another aspect of the invention provides a method of controlling the flow of cooling fluid through the cooling system of an internal combustion engine according to claim 8.
  • the restricting valve may be located in the pump outlet or adjacent thereto.
  • FIG. 1 there is shown an internal combustion engine 11 having a cooling jacket through which a liquid coolant, typically a water/glycol mix, is pumped.
  • the coolant is pumped through the engine 11 by a pump 12 mounted externally of the engine and which is rotated by an endless belt 13 driven by a pulley 14 conventionally secured to the engine crankshaft.
  • the coolant enters the pump inlet 15 from a radiator (see Fig. 3) and is pumped through pump outlet 16 into the engine 11 via conduit 17.
  • the coolant exits the engine via a thermostatically. regulated control valve or valves 18.
  • the pump 12 is an impeller pump and the impeller shaft 21 is rotated by a pulley wheel 22 (see Fig. 1) driven by the belt 13 in a well known manner.
  • the coolant flow from the pump passes through a volume flow regulating or restricting valve 23 which may be of any suitable type, for example a ball valve, or plate valve, which causes minimum flow restriction when fully open.
  • the valve 23 may be enclosed in a separate housing which is mounted to the pump outlet 16 to form a single assembly, but preferably the valve is housed within the pump outlet 16 forming a single unit.
  • the valve 23 is operated by an actuator 24 which again may be of any suitable type, for example hydraulic, electrical, or preferably a vacuum actuator which operate by a vacuum source on the vehicle.
  • the actuator 24 is biased to a valve open condition so that the valve 23 restricts coolant flow only when the actuator is energised, and is open in the case of actuator failure.
  • the valve condition is monitored by a sensor 25.
  • a cooling system which includes the pump 12.
  • the liquid coolant is pumped into the engine 11 and the heated coolant exits the engine through outlet 18 and passes to a radiator 31 and typically to a heat exchanger 32 for heating the vehicle passenger compartment.
  • the coolant then returns to the engine 11 via the pump 12.
  • a cooling fan 33 is arranged to draw cooling air through the radiator 31.
  • the valve actuator 24 is operated by a valve control 34 which receives control signals from a cooling system control module 35.
  • the control module 35 receives input signals from a plurality of different sources.
  • the module 35 receives a valve condition signal from sensor 25 to complete the control loop for the restricting valve 23, but the actual valve condition will be determined in response to other engine condition signals and to parameters which my be programmed into an engine map.
  • the sensors may be divided into three types, vehicle parameter 36, power train parameters 37, and heating and cooling parameters 38.
  • the vehicle parameter sensors 36 may include torque demand sensor e.g. accelerator pedal position, gear, speed and ignition key status.
  • the power train sensors 37 may include sensors for engine air intake temperature, cylinder head metal body temperature, engine coolant outlet temperature, engine speed, engine air flow, and engine fuel demand.
  • the heating and cooling sensors may include ambient air temperature, ambient pressure, air conditioning, passenger compartment temperature settings and fan control settings, and radiator fan status.
  • the control module. 35 processes the input signals from the various sensors and determined the optimum engine temperature in accordance with the pre-programmed engine map.
  • the valve actuator 24 is then activated to increase or decrease the flow through the valve 23 dependant upon the relationship between the required engine metal temperature and actual engine metal temperature and/or coolant flow rate required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Kraftfahrzeugverbrennungsmotorkühlsystem mit einer Pumpe (12), die einen Einlass (15) zum Empfang von Kühlmittel aus dem Kühlkreislauf und einen das Kühlmittel zum Motor lenkenden Auslass (16) aufweist, wobei der Auslass (16) ein Strömungsdrosselventil (23) darin aufweist, das zur Änderung der Liefermenge der Pumpe (12) betätigbar ist, gekennzeichnet durch ein Steuermodul (35) zur Verarbeitung des Ventilzustands und mehrerer anderer Motor- und Fahrzeugszustände zur Bestimmung eines erforderlichen Kühlmittedurchflusses und zur dementsprechenden Erhöhung oder Verringerung des Stroms durch das Ventil.
  2. System nach Anspruch 1, bei dem das Ventil von einem Stellglied (24) betätigt wird.
  3. System nach Anspruch 2, bei dem das Stellglied (24) ein vakuumbetätigbares Stellglied ist.
  4. System nach einem der vorhergehenden Ansprüche, bei dem das Modul ein Ventilzustandssignal von einem Sensor (25) erhält.
  5. System nach einem der vorhergehenden Ansprüche, bei dem die Pumpe (12) eine Kreiselradpumpe ist.
  6. System nach Anspruch 5, bei dem die Kreiselradpumpe (12) durch mechanische Mittel (13, 14) angetrieben wird.
  7. System nach Anspruch 6, das eine Kreiselradwelle (21) mit einem Riemenscheibenrad (22) darauf aufweist, das im Gebrauch durch mit der Fahrzeugmotorkurbelwelle (14) verbundene Antriebsmittel (13) angetrieben wird.
  8. Verfahren zur Steuerung des Kühlfluidstroms durch das Kühlsystem eines Verbrennungsmotors (11), das eine Umlaufpumpe (12) enthält, wobei die Fördermenge der Pumpe durch ein am Pumpenauslass (16) angeordnetes Strömungsdrosselventil (23) gesteuert wird, dadurch gekennzeichnet, dass der Strom durch das Ventil als Reaktion auf den Ventilzustand und mehrerer anderer Motor- und Fahrzeugzustände erhöht oder verringert wird.
  9. Verfahren nach Anspruch 8, bei dem der Strom durch das Ventil durch ein Steuermodul erhöht oder verringert wird, das Signale von einem Ventilzustandssensor (25) und mehreren anderen Sensoren (36, 37, 38) verarbeitet.
EP02735601A 2001-07-05 2002-06-05 Kühlungssystem für eine brennkraftmaschine eines kraftfahrzeugs Expired - Fee Related EP1404950B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0116433A GB0116433D0 (en) 2001-07-05 2001-07-05 Cooling system for a motor vehicle engine
GB0116433 2001-07-05
PCT/GB2002/002604 WO2003004840A1 (en) 2001-07-05 2002-06-05 Cooling system for a motor vehicle engine

Publications (2)

Publication Number Publication Date
EP1404950A1 EP1404950A1 (de) 2004-04-07
EP1404950B1 true EP1404950B1 (de) 2004-11-24

Family

ID=9917969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02735601A Expired - Fee Related EP1404950B1 (de) 2001-07-05 2002-06-05 Kühlungssystem für eine brennkraftmaschine eines kraftfahrzeugs

Country Status (4)

Country Link
EP (1) EP1404950B1 (de)
DE (1) DE60202073T2 (de)
GB (2) GB0116433D0 (de)
WO (1) WO2003004840A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2420846B (en) 2004-12-04 2009-07-08 Ford Global Technologies Llc A cooling system for a motor vehicle engine
DE212009000182U1 (de) * 2009-06-19 2012-05-08 Industrie Saleri Italo S.P.A. Mechanische Kühlmittelpumpe, insbesondere für Fahrzeuge
MX2012009360A (es) * 2010-02-16 2013-03-21 Pierburg Pump Technology Gmbh Bomba mecanica del liquido refrigerador.
TR201103681A2 (tr) * 2011-04-15 2012-08-22 Ünlüaslan Faruk İçten yanmalı motorlar için soğutma suyu sirkülasyonunu engelleyici anahtarlama sistemi.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455173A2 (fr) * 1977-03-16 1980-11-21 Sev Marchal Dispositif de refroidissement pour moteur a combustion interne
DE2841555A1 (de) * 1978-09-23 1980-04-03 Audi Nsu Auto Union Ag Fluessigkeitsgekuehlte brennkraftmaschine
DE3328028A1 (de) * 1982-08-20 1984-02-23 National Research Development Corp., London Brennkraftmaschine
US4744335A (en) 1987-08-03 1988-05-17 Chrysler Motors Corporation Servo type cooling system control
DE4033261C2 (de) * 1990-10-19 1995-06-08 Freudenberg Carl Fa Temperaturgesteuerter Kühlkreis einer Verbrennungskraftmaschine
DE4117532A1 (de) * 1991-05-29 1992-12-03 Ingelheim Peter Graf Von Selbstregelndes kuehlsystem fuer waermekraftmaschinen, insbesondere verbrennungsmotoren mit weitem drehzahlbereich
IT1291190B1 (it) 1997-03-13 1998-12-29 Gate Spa Sistema di raffreddamento per un motore a combustione interna, particolarmente per autoveicoli
JP3891512B2 (ja) * 1997-05-29 2007-03-14 日本サーモスタット株式会社 内燃機関の冷却制御装置および冷却制御方法
DE19725216C1 (de) * 1997-06-15 1998-11-19 Daimler Benz Ag Vorrichtung zum Antreiben von Aggregaten einer Brennkraftmaschine
IT1293664B1 (it) * 1997-08-01 1999-03-08 C R F Societa Conosrtile Per A Sistema di raffreddamento per motore a combustione interna di autoveicolo
IT1293667B1 (it) 1997-08-01 1999-03-08 Fiat Ricerche Sistema di raffreddamento per un motore di autoveicolo.

Also Published As

Publication number Publication date
GB2377253A (en) 2003-01-08
GB0212842D0 (en) 2002-07-17
EP1404950A1 (de) 2004-04-07
WO2003004840A1 (en) 2003-01-16
DE60202073T2 (de) 2005-12-22
GB0116433D0 (en) 2001-08-29
DE60202073D1 (de) 2004-12-30

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