WO1999041497A1 - Melangeur d'air - Google Patents

Melangeur d'air Download PDF

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Publication number
WO1999041497A1
WO1999041497A1 PCT/EP1998/007251 EP9807251W WO9941497A1 WO 1999041497 A1 WO1999041497 A1 WO 1999041497A1 EP 9807251 W EP9807251 W EP 9807251W WO 9941497 A1 WO9941497 A1 WO 9941497A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
air inlet
cold air
control
detection device
Prior art date
Application number
PCT/EP1998/007251
Other languages
German (de)
English (en)
Inventor
Heinz Müller
Original Assignee
Filterwerk Mann + Hummel Gmbh
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 Filterwerk Mann + Hummel Gmbh filed Critical Filterwerk Mann + Hummel Gmbh
Publication of WO1999041497A1 publication Critical patent/WO1999041497A1/fr

Links

Classifications

    • 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
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F02M31/07—Temperature-responsive control, e.g. using thermostatically-controlled valves
    • 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

Definitions

  • the present invention relates to an air mixer for an internal combustion engine, with a housing, a cold air inlet and a warm air inlet.
  • intake air at a desired temperature which is advantageous for combustion can be supplied to the internal combustion engine regardless of the outside temperature.
  • cold air and warm air can be mixed together, for example, at an outside temperature of zero degrees Celsius or colder and a supply of warm air of 80 to 100 degrees Celsius, in order to obtain mixed air with a desired temperature as intake air.
  • snow can be sucked in during journeys that are affected by heavy snowfall or snow swirling and this snow can accumulate on the filter insert and possibly clog this filter insert. This can cause the engine to stop.
  • the invention is based on the task of further improving already known air mixers.
  • the ingress of snow should be reliably prevented and the air mixture should be ensured over a wide operating range.
  • This object is achieved in an air mixer of the type mentioned at the outset in that a detection device for detecting snow air and a closing device controlled by the detection device for closing the cold air inlet in snow air are provided.
  • Snow air is air that is cold enough to contain snow, i.e. Air that is between zero and two degrees Celsius cold or colder.
  • the cold air inlet is then closed when there is a risk of snow penetration, in order to prevent snow air from entering through the cold air inlet and thereby preventing the entry of snow or ice crystals.
  • Warm air can get into the air mixer via the warm air inlet and is sufficiently heated so that it cannot contain snow or ice crystals.
  • the detection device is expediently designed as a temperature detection device.
  • the air mixer can thereby recognize when the cold air temperature is below one - 3 -
  • the closing device can be designed in various ways.
  • the closing device can have its own slide or the like, which closes the cold air inlet in the appropriate position.
  • the closing device is preferably part of an adjusting device with which the quantitative ratio of cold air and warm air entering the housing can be adjusted.
  • the adjusting device can be designed such that it can be brought into a position in which the cold air inlet is closed, and it can be controlled by the detection device.
  • the closing device can in particular have a mixer flap which is movable between a first position in which the cold air inlet is closed and a second position in which the warm air inlet is closed.
  • Control unit for controlling the closing unit arranged in the interior of the housing and the housing has a control air inlet for the inlet of cold air to the control unit.
  • control unit and the control air inlet are advantageously arranged downstream of the cold air inlet and the warm air inlet, so that the control unit lies in the mixed air flow.
  • control unit can operate as a control unit in normal operation, when there is no snow air, which controls the position of the closing unit as a function of the
  • thermoelectric element or a temperature sensor, in particular a thermostat for actuating the closing device depending on the temperature of the mixed air.
  • the control unit in particular its thermostat, can be supplied with cold air via the control air inlet in the case of snow air, so that the control unit does not start from the warmer mixed air itself, but from the colder temperature of the cold air passed through the control air inlet and controls the closing device accordingly to close it.
  • the control unit can be manipulated by specifically exposing the control unit to the cold air, so that it tries to mix in more warm air and brings the closing device into its closing position.
  • a shut-off device for the control air inlet, which closes the control air inlet in normal operation and opens when there is snow air.
  • the control unit is therefore only exposed to the cold air when there is snow, while in normal operation no cold air can penetrate through the control air inlet and the control unit starts from the warmer mixed air.
  • the control unit or its thermostat is exposed to the mixed air mixed from cold air and warm air, so that its temperature can be regulated.
  • the cold air inlet is opened more or less or the warm air inlet is closed more or less in order to set the desired ratio of cold air to warm air and thereby the desired mixed air temperature.
  • the shut-off device for the control air inlet opens, so that the control unit or its thermostat inside the housing - 5 -
  • the flow cross-section of the control air inlet can be very small compared to the cold air inlet, for example 5 to 15% of the latter, since no intake air is to be provided via the control air inlet, but only the thermostat of the control unit is to be exposed to the cold air.
  • the shut-off device is preferably controllable as a function of the detection device, in particular, it can be actuated by it.
  • the shut-off device can be designed as a separate component which is actuated, for example, by means of an actuating device as a function of a corresponding signal from the detection device.
  • the shut-off device is preferably formed by the detection device itself.
  • the detection device and the shut-off device can have an integral common component that deforms depending on the cold air temperature between two positions.
  • the detection device is thus designed simultaneously as a sensor and an actuator.
  • the detection device can have a movement element, preferably made of bimetal or memory metal, which can be moved between two positions in accordance with the ambient temperature. This movement element, which acts simultaneously as a detection device and as a shut-off device, is in a first position in the case of snow air, in which it releases the control air inlet, and in an ambient air temperature which is above the critical temperature - 6 -
  • Fig. 1 shows an air mixer according to a preferred
  • FIG. 2 shows a top view of the shut-off device for the control air inlet according to FIG. 1.
  • the air mixer has a housing 1 which has a cold air inlet 2 and a warm air inlet 3 at one of its ends. At the opposite end, a mixed air outlet 4 is provided, which can be connected to the inlet side of an internal combustion engine (not shown) (cf. FIG. 1).
  • an adjusting device 5 is provided in the interior of the housing 1, which has a substantially plate-shaped mixer flap 6 pivotably mounted on the housing.
  • the mixer flap 6 is movable in such a way that it is in a first position in - 7 -
  • the adjusting device 5 thus acts as a closing device for the cold air inlet 2, which prevents snow air from entering the housing 1.
  • the mixer flap 6 is infinitely adjustable between the two positions in order to be able to bring about any desired mixing ratio between cold air and warm air.
  • the inside of the mixer flap 6 In order to be able to regulate the mixed air temperature, the inside of the mixer flap 6
  • a control device 7 which has a thermostat 8 arranged in front of the mixed air outlet 4, downstream of the cold air inlet 2 and the warm air inlet 3.
  • the thermostat 8 is preferably designed as a stretch-strip thermostat.
  • the position of the mixer flap 6 is adjusted in order to obtain the desired mixed air temperature by regulating the quantity of the warm air and cold air flows.
  • a connection 9 is provided between the mixer flap 6 and the control device 7, which transmits the reaction of the thermostat 8 to the temperature of the air flowing around it to the mixer flap 6.
  • the housing 1 has a control air inlet 10 which opens directly in front of the control device 7, in particular the thermostat 8.
  • the size of the control NOT TO BE TAKEN INTO ACCOUNT FOR THE PURPOSE OF INTERNATIONAL PROCESSING
  • the bending plate 12 which deforms as a function of temperature preferably consists of a bimetal or a memory metal which brings about the desired deformation at a temperature of approximately 0 to 2 degrees Celsius.
  • the bending plate 12 therefore feels a critical temperature at or below which the cold air could contain snow or ice crystals, and deforms when the temperature falls below this critical temperature.
  • the bending plate 12 acts on the one hand as a detection device for snow air and on the other hand at the same time as a shut-off device for the control air inlet 10.
  • the regulating device 7 acts as a control device for the mixer flap 6, i.e. as soon as the thermostat 8 feels cold air flowing in through the control air inlet 10, it controls the mixer flap 6 in such a way that it is moved into the position closing the cold air inlet 2.
  • the thermostat 8 is designed such that it moves the mixer flap 6 into the position closing the cold air inlet 2 when the air surrounding the thermostat has a temperature of less than or equal to 0 to 2 degrees Celsius. The cold air flowing in through the control air inlet 10 always has this temperature, since the shut-off device 11 only releases the cold air inlet 10 in this temperature range.
  • the bending plate 12 In normal operation, i.e. at an outside temperature greater than or equal to about 2 degrees Celsius, the bending plate 12 is in the position shown in Fig. 1, i.e. the control air inlet 10 is closed, so that no cold air can penetrate into the interior of the housing 1 through the control air inlet 10.
  • the control device 7 therefore senses the temperature of the mixed air flow, which is composed of the cold air flowing in through the cold air inlet 2 and the warm air flowing in through the warm air inlet 3, which can be between 80 and 100 degrees Celsius, for example, depending on the temperature of the internal combustion engine.
  • the control device 7 then adjusts the position of the mixer flap 6 as a function of the measured mixed air temperature and thereby the quantitative ratio of cold air to warm air in order to obtain a desired mixed air temperature.
  • the shut-off device 11 opens and cold air can flow through the control air inlet 10 to the control device 7 so that it no longer matches the mixed air flow, but is exposed to the incoming cold air flow through the control air inlet 10. Accordingly, the control device 7 no longer feels the temperature of the mixed air, but directly the temperature of the cold air, which is cold enough to be able to contain snow crystals.
  • the regulating device 7 therefore senses a temperature which is lower than the temperature to which the mixed air is to be regulated.
  • the control device 7 tries to mix in more warm air and for this purpose moves the mixer flap 6 into the position closing the cold air inlet 2, which is shown in FIG. 1. Because of the cold air inlet 2, none can - 11 -

Abstract

L'invention concerne un mélangeur d'air pour un moteur à combustion interne, comportant un boîtier (1), une entrée d'air froid (2) et une entrée d'air chaud (3). L'invention est caractérisée par une unité de détection (12), qui détecte la présence d'air chargé de neige, et par un dispositif de fermeture (6) commandé par l'unité de détection et servant à fermer l'ouverture d'air froid (2) en présence d'air chargé de neige.
PCT/EP1998/007251 1998-02-13 1998-11-12 Melangeur d'air WO1999041497A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19805961.2 1998-02-13
DE19805961A DE19805961A1 (de) 1998-02-13 1998-02-13 Luftmischer

Publications (1)

Publication Number Publication Date
WO1999041497A1 true WO1999041497A1 (fr) 1999-08-19

Family

ID=7857647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/007251 WO1999041497A1 (fr) 1998-02-13 1998-11-12 Melangeur d'air

Country Status (2)

Country Link
DE (1) DE19805961A1 (fr)
WO (1) WO1999041497A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001294A1 (de) * 2000-01-14 2001-07-19 Mann & Hummel Filter Luftzuführungsvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2122543A1 (de) * 1971-05-07 1972-11-23 Purolafor Filter GmbH, 7110 Öhringen Verfahren und Vorrichtung zur Steuerung der Mischungsrate von kalter und vorgewärmter Ansaugluft für Verbrennungskraftmaschinen
JPS60256547A (ja) * 1984-05-31 1985-12-18 Suzuki Motor Co Ltd エンジンの吸入空気温度自動調整装置
US4969939A (en) * 1989-10-02 1990-11-13 Allied-Signal Inc. Heavy duty air filter with integral snow valve
DE4413765A1 (de) 1993-05-11 1994-11-17 Mann & Hummel Filter Luftfilter für Brennkraftmaschinen
DE19523297A1 (de) * 1995-06-27 1997-01-02 Mann & Hummel Filter Vorrichtung zur Regelung der Temperatur der Ansaugluft einer Brennkraftmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317517A1 (fr) * 1975-07-11 1977-02-04 Tecafiltres Sa Filtre a air pour vehicule automobile
DE9212739U1 (fr) * 1992-09-22 1992-11-12 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2122543A1 (de) * 1971-05-07 1972-11-23 Purolafor Filter GmbH, 7110 Öhringen Verfahren und Vorrichtung zur Steuerung der Mischungsrate von kalter und vorgewärmter Ansaugluft für Verbrennungskraftmaschinen
JPS60256547A (ja) * 1984-05-31 1985-12-18 Suzuki Motor Co Ltd エンジンの吸入空気温度自動調整装置
US4969939A (en) * 1989-10-02 1990-11-13 Allied-Signal Inc. Heavy duty air filter with integral snow valve
DE4413765A1 (de) 1993-05-11 1994-11-17 Mann & Hummel Filter Luftfilter für Brennkraftmaschinen
DE19523297A1 (de) * 1995-06-27 1997-01-02 Mann & Hummel Filter Vorrichtung zur Regelung der Temperatur der Ansaugluft einer Brennkraftmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 130 (M - 478)<2187> 14 May 1986 (1986-05-14) *

Also Published As

Publication number Publication date
DE19805961A1 (de) 1999-08-19

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