EP2927457A1 - Système de pressurisation d'un circuit de refroidissement d'un moteur à combustion interne installé dans une unité entraînée par un moteur - Google Patents

Système de pressurisation d'un circuit de refroidissement d'un moteur à combustion interne installé dans une unité entraînée par un moteur Download PDF

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Publication number
EP2927457A1
EP2927457A1 EP14163018.6A EP14163018A EP2927457A1 EP 2927457 A1 EP2927457 A1 EP 2927457A1 EP 14163018 A EP14163018 A EP 14163018A EP 2927457 A1 EP2927457 A1 EP 2927457A1
Authority
EP
European Patent Office
Prior art keywords
pressure
control unit
engine driven
pump
cooling circuit
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.)
Granted
Application number
EP14163018.6A
Other languages
German (de)
English (en)
Other versions
EP2927457B1 (fr
Inventor
Manuel Varwick
Ralf Gaessler
Martin Scheiger
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.)
Iveco Magirus AG
Original Assignee
Iveco Magirus AG
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 Iveco Magirus AG filed Critical Iveco Magirus AG
Priority to ES14163018T priority Critical patent/ES2796273T3/es
Priority to EP14163018.6A priority patent/EP2927457B1/fr
Priority to BR102015007439-5A priority patent/BR102015007439B1/pt
Publication of EP2927457A1 publication Critical patent/EP2927457A1/fr
Application granted granted Critical
Publication of EP2927457B1 publication Critical patent/EP2927457B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
    • 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
    • F01P2025/00—Measuring
    • F01P2025/04—Pressure

Definitions

  • the present invention is related to a pressurization system of a cooling circuit of an internal combustion engine installed in an engine driven unit, according to the preamble of claim 1.
  • the cooling circuit for cooling the engine to a certain pressure, for example, to avoid boiling of the cooling fluid (i. e. water) or cavitation within the cooling circuit.
  • the coolant tank is pressurized by a pressure source like an external air pressure circuit that is also used for other purposes.
  • utility vehicles only represent one example of an engine driven unit to which the present invention can be applied.
  • the invention is applicable to wheeled and/or tracked vehicles of any kind, as well as to ships or emergency generators.
  • provisions must be taken to protect the coolant tank from an over pressure.
  • These provisions can include pressure limiting valves disposed within the pressurizing line, to reduce the high pressure of the common pressure circuit down to a lower pressure. Solenoid valves can be used to control the pressure supply to the coolant tank.
  • these operation states may include the on/off-state of the engine (i.e. the ignition), the operation state of the water pump, or the temperature within the cooling circuit.
  • a pump as a pressure source
  • a pressurizing system comprises at least one pressure sensor disposed to detect the pressure within the cooling circuit. It is connected to the control unit of the pump to communicate pressure data representing the detected pressure to the control unit. Moreover, the control unit comprises a data interface for receiving status data representing an operation state of the engine driven unit. The control unit is provided to control the operation of the pump so as to regulate the pressure within the cooling circuit to a pressure level that is determined on the present status data received via the interface.
  • the pressure sensor is disposed to detect the air pressure within the coolant tank.
  • the pressure sensor can be positioned within the tank above the fluid level.
  • the pressure sensor is disposed to detect the pressure of the cooling fluid.
  • the pressure sensor can be positioned in front of or after a fluid pump for circulating the cooling fluid within the cooling circuit. It is also possible to use more than one sensor, for example, a first sensor for detecting the air pressure within the coolant tank, and a second sensor to detect the fluid pressure within the cooling circuit, and to use one or both pressure signals for regulation.
  • a corresponding target pressure can be calculated by the control unit or can be allocated to the operation state while it has been previously stored within a memory of the control unit.
  • This target pressure can be compared to pressure detected by the pressure sensor.
  • the pump can be controlled accordingly to regulate the pressure within the coolant tank to the target pressure. For example, if the detected pressure within the cooling circuit is too low, the control unit will increase the power of the pump to built up a higher pressure. On the other hand, if there is an over pressure in the cooling circuit with respect to the present operation state of the engine driven unit, the control unit controls the pump to lower the pressure supplied via the pressurization line.
  • control unit is provided to calculate a control signal from the pressure data and the status data and to transmit the control signal to the pump.
  • the status data comprise at least one of the following group:
  • the control unit can calculate logical states from this status data mentioned above (for example, engine ignition activated AND temperature value above a predeterminded level) and calculate the control signal for the pump accordingly).
  • the present invention also refers to an engine driven unit, comprising a pressurization system as described above.
  • Such engine driven unit may preferably comprise a data bus system to transmit status data representing an operation state of the engine driven unit, wherein the data interface of the control unit is connected to this data bus system.
  • the control unit can use status data that are already present within the bus system for controlling the pump.
  • this engine driven unit is represented by a utility vehicle.
  • Fig. 1 and 2 are schematic views of layouts of pressurization systems representing a first embodiment and a second embodiment of the present invention.
  • Fig. 1 is a schematic view of a pressurization system 10 according to a first embodiment of the present invention.
  • This pressurization system 10 is provided to pressurize the cooling circuit of an internal combustion engine installed in an engine driven unit, like, for example, a utility vehicle.
  • a pressure source 12 is connected with a coolant tank 14 by a pressurization line 16.
  • the coolant tank 14 is integrated into the cooling circuit.
  • the pressure source 12 comprises a pump 13 to pressurize a fluid originating from a general fluid reservoir to be supplied to the coolant tank 14.
  • This fluid reservoir can be represented by, for example, the environmental atmosphere at a normal environmental pressure level, which is raised continuously by the pump 13 to a higher pressure level, e.g., in a range from 0 bar to about 6 bar (abs) or 600 kPa.
  • Reference 18 denotes an air filter.
  • the power of the pump 13 is variable and can be raised or lowered to increase or decrease the output pressure of the pump 13.
  • a control unit 20 is provided that is electrically connected to the pump 13 via a control line 22.
  • This control unit 20 can also provide other control functions of the operation of the engine and is designated as ECU (engine control unit) accordingly. However, this designation shall not be understood as limiting for the control function of the pump 13.
  • the control unit 20 can rather also be an independent control unit.
  • a pressure sensor 24 is provided to detect the air pressure within the coolant tank 14. This pressure sensor 24 is connected to the control unit 20 via a data line 26 so that present pressure data can be transmitted from the pressure sensor 24 to the control unit 20, representing the actual pressure within the coolant tank 14.
  • the control unit is further connected to a bus system 28 of the engine driven unit via a data interface 30, so that status data transmitted within the bus system 28 can be transmitted via the interface 30 to the control unit 20.
  • These status data may comprise, for example, data indicating the engine ignition status, i.e. indicating if the engine ignition is activated or not, and/or a cooling system temperature status data, indicating if the temperature within the cooling system is higher than a predetermined temperature value or not.
  • the status data transmitted within the bus system 28 may also comprise other status data, and the present invention is not limited with respect to the type of status data transmitted to the control unit 20.
  • These status data have in common that they represent an operation state of the engine driven unit. This means that the control unit 20 is provided with an information of this operation state, represented by these status data received via the interface 30.
  • the control unit 20 can calculate a target pressure level of the coolant tank 14 corresponding to the present state of the engine driven unit. This means that one pressure level of the coolant tank 14 may be desired in one determined operation state of the engine driven unit, while another pressure level, i.e. a higher or lower pressure level may be desired in another operation state. Additionally, the control unit 20 receives the pressure data via the data line 26 from the pressure sensor 24. On this basis the control unit 20 can determine whether or not the actual pressure within the coolant tank 14 corresponds to the desired pressure with respect to the present operation state of the engine driven unit. If this is not the case, the operation of the pump 13 can be controlled accordingly.
  • the control unit 20 transmits a control signal via the control line 22 to the pump 13 to increase the pump power and to raise the pressure level.
  • the pump 13 is controlled to decrease its power.
  • the operation of the pump 13 can be controlled by the control unit 20 so as to regulate the pressure within the coolant tank 14 to a pressure level that is determined on the present status date as received via the interface 30.
  • Fig. 2 is a schematic view of a pressurization system 100 according to a second embodiment of the present invention.
  • the pressure sensor 24 is is disposed upstream a fluid pump 102 to detect the pressure of the cooling fluid.
  • the other elements of the pressurization system 100 are the same as to the pressurization system 10 of the first embodiment, and so a detailed description thereof is omitted here for the sake of brevity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
EP14163018.6A 2014-04-01 2014-04-01 Unite entrainee par un moteur avec un systeme de pressurisation d'un circuit de refroidissement d'un moteur a combustion interne Active EP2927457B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES14163018T ES2796273T3 (es) 2014-04-01 2014-04-01 Unidad accionada por motor con un sistema de presurización de un circuito de refrigeración de un motor de combustión interna
EP14163018.6A EP2927457B1 (fr) 2014-04-01 2014-04-01 Unite entrainee par un moteur avec un systeme de pressurisation d'un circuit de refroidissement d'un moteur a combustion interne
BR102015007439-5A BR102015007439B1 (pt) 2014-04-01 2015-04-01 Unidade acionada por motor compreendendo um sistema de pressurização

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14163018.6A EP2927457B1 (fr) 2014-04-01 2014-04-01 Unite entrainee par un moteur avec un systeme de pressurisation d'un circuit de refroidissement d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP2927457A1 true EP2927457A1 (fr) 2015-10-07
EP2927457B1 EP2927457B1 (fr) 2020-04-29

Family

ID=50424068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14163018.6A Active EP2927457B1 (fr) 2014-04-01 2014-04-01 Unite entrainee par un moteur avec un systeme de pressurisation d'un circuit de refroidissement d'un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP2927457B1 (fr)
BR (1) BR102015007439B1 (fr)
ES (1) ES2796273T3 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007781A1 (de) * 2005-02-19 2006-08-24 Man Nutzfahrzeuge Ag Verfahren und Anordnung zum schnellen Aufbau des Systemdrucks im Kühlmittelkreislauf von Brennkraftmaschinen
WO2008097166A1 (fr) * 2007-02-09 2008-08-14 Volvo Lastvagnar Ab Système de liquide de refroidissement
DE102009018012A1 (de) * 2009-04-18 2010-10-21 Daimler Ag Verfahren zum Steuern des Systemdrucks in einem Kühlmittelkreislauf
DE102010024766A1 (de) * 2010-06-23 2011-12-29 Daimler Ag Kraftfahrzeugkühlvorrichtung
DE102011108041A1 (de) * 2011-07-19 2013-01-24 Daimler Ag Vorrichtung zum Steuern des Systemdrucks in einem Kühlmittelkreislauf für eine Brennkraftmaschine
DE102011108007A1 (de) * 2011-07-19 2013-01-24 Daimler Ag Verfahren zum Steuern des Systemdrucks in einem Kühlmittelkreislauf für eine Brennkraftmaschine
DE102007058575B4 (de) 2007-12-05 2013-08-01 Man Truck & Bus Ag Kraftfahrzeug mit Druckluft gestütztem Kühlsystem

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007781A1 (de) * 2005-02-19 2006-08-24 Man Nutzfahrzeuge Ag Verfahren und Anordnung zum schnellen Aufbau des Systemdrucks im Kühlmittelkreislauf von Brennkraftmaschinen
WO2008097166A1 (fr) * 2007-02-09 2008-08-14 Volvo Lastvagnar Ab Système de liquide de refroidissement
DE102007058575B4 (de) 2007-12-05 2013-08-01 Man Truck & Bus Ag Kraftfahrzeug mit Druckluft gestütztem Kühlsystem
DE102009018012A1 (de) * 2009-04-18 2010-10-21 Daimler Ag Verfahren zum Steuern des Systemdrucks in einem Kühlmittelkreislauf
DE102010024766A1 (de) * 2010-06-23 2011-12-29 Daimler Ag Kraftfahrzeugkühlvorrichtung
DE102011108041A1 (de) * 2011-07-19 2013-01-24 Daimler Ag Vorrichtung zum Steuern des Systemdrucks in einem Kühlmittelkreislauf für eine Brennkraftmaschine
DE102011108007A1 (de) * 2011-07-19 2013-01-24 Daimler Ag Verfahren zum Steuern des Systemdrucks in einem Kühlmittelkreislauf für eine Brennkraftmaschine

Also Published As

Publication number Publication date
ES2796273T3 (es) 2020-11-26
EP2927457B1 (fr) 2020-04-29
BR102015007439B1 (pt) 2022-08-16
BR102015007439A2 (pt) 2018-02-06

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