EP1201910B1 - Inlet manifold - Google Patents

Inlet manifold Download PDF

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Publication number
EP1201910B1
EP1201910B1 EP01124650A EP01124650A EP1201910B1 EP 1201910 B1 EP1201910 B1 EP 1201910B1 EP 01124650 A EP01124650 A EP 01124650A EP 01124650 A EP01124650 A EP 01124650A EP 1201910 B1 EP1201910 B1 EP 1201910B1
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EP
European Patent Office
Prior art keywords
sensor
intake system
air inlet
valve
main
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 - Lifetime
Application number
EP01124650A
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German (de)
French (fr)
Other versions
EP1201910A3 (en
EP1201910A2 (en
Inventor
Hermann Maurer
Klaus Waltenberg
Alfred Sadlauer
Georg Novotny
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.)
Bayerische Motoren Werke AG
Mann and Hummel GmbH
Original Assignee
Bayerische Motoren Werke AG
Mann and Hummel GmbH
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Publication date
Application filed by Bayerische Motoren Werke AG, Mann and Hummel GmbH filed Critical Bayerische Motoren Werke AG
Publication of EP1201910A2 publication Critical patent/EP1201910A2/en
Publication of EP1201910A3 publication Critical patent/EP1201910A3/en
Application granted granted Critical
Publication of EP1201910B1 publication Critical patent/EP1201910B1/en
Anticipated expiration legal-status Critical
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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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/10393—Sensors for intake systems for characterising a multi-component mixture, e.g. for the composition such as humidity, density or viscosity
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/165—Marine vessels; Ships; Boats
    • F02M35/167—Marine vessels; Ships; Boats having outboard engines; Jet-skis
    • F02M35/168—Marine vessels; Ships; Boats having outboard engines; Jet-skis with means, e.g. valves, to prevent water entry

Definitions

  • the invention relates to an intake system according to the preamble of claim 1. Furthermore, the invention relates to a method for operating the above-mentioned intake system.
  • JP 57 135 256 an intake system having a Hauptroh Kunststoffeinlass, a Hilfsroh Kunststoffeinlass and a water sensor.
  • the water sensor is arranged in a vessel in which water can accumulate. Once the vessel is filled with water and water enters the main air inlet, the water sensor detects this and sends a signal to close the main air inlet through a valve located in the main air inlet.
  • the valve is designed so that it opens the Hilfsrohlufeinlass when closing the Hauptrohlufteinlasses.
  • a disadvantage of this design is that water must collect in the container so that the water sensor switches.
  • condensate water can collect from components adjacent to the intake system in the container and fill it, whereby the water sensor emits a signal without the possibility of water suction.
  • filling the container with water e.g. take too long to splash, causing the valve to close the main blown air inlet too late.
  • Once collected in the container water causes the closing of the valve, even if there is no more water in the environment. Thus, this control of the valve is inaccurate and unreliable.
  • the object of the invention is therefore to provide an intake system which has a reliable and accurate control to avoid water intake. This object is solved by the features of claim 1.
  • the intake system according to the invention is advantageously suitable for sucking in air for an internal combustion engine and for preventing a water intake which is detrimental to the internal combustion engine.
  • This intake system is suitable for all types of internal combustion engines with a wide variety of uses, in particular for internal combustion engines in motor vehicles.
  • the intake system has a Hauptroh Kunststoffeinlass, which on the one hand has an opening and on the other hand connected to an air filter corresponding.
  • On the air filter includes downstream of a clean air line, which is connected in correspondence with the internal combustion engine.
  • various components may be arranged, which e.g. improve the acoustics of the intake system or fulfill other functions.
  • the opening, through which air is sucked in from the environment, is arranged at a location which is advantageous for air intake. Cool air containing oxygen, which advantageously influences the combustion in the internal combustion engine, may preferably be sucked in at this location, which is advantageous for air intake.
  • this point which is advantageous for air intake, can be arranged, for example, in the front region, in particular behind the radiator.
  • a humidity sensor is arranged which detects moisture entering the main blast air inlet, in particular water.
  • the moisture sensor can be designed in such a way that it already transmits the signal "water in the main air inlet" to the evaluation unit in the case of water spray, which is generated, for example, by a preceding vehicle, or only in the case of water hammer, which occurs when passing through a water ford
  • the humidity sensor has a signal output which is connected correspondingly to an evaluation unit, whereby the connection between the signal output and the evaluation unit can be made directly by eg a cable, an infrared interface, radio or indirectly via intermediate components The connection transmits the signal of the moisture sensor to the evaluation unit, the fastest possible signal transmission being advantageous Humidity sensor is tested and a control signal is output.
  • the evaluation unit is connected to at least one further sensor, which is arranged outside of the intake system and for detecting other, the intake system is not directly relevant functions provided correspondingly connected.
  • a switching logic can be generated by the signal of the humidity sensor in conjunction with the signal of the sensor arranged outside the intake system.
  • the signal of the humidity sensor may e.g. by the signal of the external sensor, if this can also detect water, confirmed or negated.
  • Other sensors which do not detect humidity but environmental conditions may e.g. accelerate or slow down the closing of the main air intake.
  • a control signal is output in accordance with the switching logic defined in the evaluation unit.
  • the operability of the sensor located outside the intake system may be e.g. tested at the start of the engine and a corresponding control signal is output.
  • a valve is movably arranged, which can close the main raw air inlet when moisture or water ingress sealing.
  • This valve is connected in correspondence with the evaluation unit, this connection being made directly by e.g. a cable, an infrared interface, radio or indirectly via interconnected components such as e.g. Control electronics or signal amplifier can be done.
  • the control signal output by the evaluation electronics causes e.g. a fast, slow or partial closing of the main blast air inlet by the valve, which e.g. can be designed as a rotary valve, one-piece or multi-part flap.
  • drives such. pneumatic, hydraulic, electromagnetic or electric drives are used.
  • the intake system has in addition to the Hauptroh Kunststoffeinlass still a Hilfsroh Kunststoffeinlass, which on the one hand has a passage and on the other hand corresponding to the, connected to the air filter, clean air line is connected.
  • the passage is arranged in a moisture-proof location.
  • the passage may be arranged downstream of a water separator in special embodiments.
  • the passage of the auxiliary raw air inlet may be higher in relation to the opening of the main raw air inlet.
  • a moisture-proof point in a motor vehicle can be, for example, the engine compartment or the ventilation system for the passenger compartment. Through this auxiliary air intake, once the main air intake is closed, air can flow into the intake system.
  • the auxiliary blast air inlet may be larger, equal or smaller in cross-section relative to the main blast air inlet.
  • the cross section or a larger air resistance of the Hilfsroh Kunststoffeinlasses this can always be unlocked, since with the Hauptroh Kunststoffeinlass open, the air always flows through the Feldroh Kunststoffeinlass with the larger cross-section or lower air resistance in the intake system.
  • the Hilfsrohlufteinlass is performed at least partially closed, wherein the valve which is arranged in the Hauptrohlufteinlass, can also serve to close the Hilfsrohlufteinlasses.
  • a separately executed closure element may be provided for closing the Hilfsroh Kunststoffeinlasses.
  • the senor arranged outside the intake system is a rain sensor, which, e.g. is arranged on a windshield of a motor vehicle and detects incident raindrops or wet or wet snow.
  • the sensor may also communicate with a windshield wiper of a motor vehicle and detect the operation of the windshield wiper.
  • the rain sensor transmits a signal which can be used in the evaluation unit for confirming the signal from the humidity sensor from the main raw air inlet.
  • Moisture and rain sensor do not report water, whereby the control signal of the evaluation unit opens the main blast air inlet or keeps open and the air can flow through this into the intake system.
  • Second variant moisture and rain sensor report water, causing the control signal of the evaluation unit causes the closing of the main raw air inlet. The air must flow through the auxiliary air intake into the intake system.
  • Moisture sensor reports water, rain sensor does not report water.
  • the main blast air inlet is partially closed, whereby humid air is mixed with dry air from the auxiliary blast air inlet.
  • the mixing ratio can be adjusted in special versions, if the humidity sensor continues to report water. This readjustment can lead to the complete closing of the main blast air inlet.
  • Moisture sensor does not report water, rain sensor reports water.
  • the Hauptroh Kunststoffeinlass be closed or remain open. This decision can be defined for example in a specification of the engine manufacturer.
  • the sensor which is arranged outside the intake system, is a moisture sensor for detecting an environmental condition.
  • an arrangement of the humidity sensor e.g. on a bumper or in a wheel arch of a motor vehicle advantageous possibilities.
  • the environmental condition e.g. the road on which the vehicle is traveling.
  • the signal of this moisture sensor arranged outside the intake system is linked in the evaluation unit to the signal of the humidity sensor arranged in the main raw air inlet.
  • the combination of these two sensors results in four variants, which can be used according to the requirements for opening, partial or complete closing of the Hauptroh Kunststoffeinlasses.
  • a combination of the two humidity sensors with the rain sensor allows further variants, whereby a better logic for controlling the valve can be generated.
  • the sensor arranged outside the intake system is a float, which is provided for detecting an environmental condition.
  • This float responds to water hammer when e.g. a water wave to the intake system or the internal combustion engine comes to or drives a motor vehicle through a body of water.
  • the float signal is linked to the signal of the arranged in the Hauptroh Kunststoffeinlasses moisture sensor, in addition, other signals from other sensors can be mitverknüpft.
  • the sensor arranged outside the intake system is provided for detecting characteristic data of the internal combustion engine, in particular rotational speed, temperature, air flow rate.
  • the valve for closing the Hauptrohlufteinlasses can be controlled so that the combustion engine no abrupt air supply changes. For example, when the internal combustion engine drives a motor vehicle at full load and the air supply in the intake system is suddenly switched from the main air intake to the main air intake, this impairs the ride comfort because a jolt is felt in the passenger compartment.
  • a slow changeover of the air supply from the Kleinrohlufteinlass on the Hilfsroh Kunststoffeinlass improves ride comfort.
  • the cold start phase can be shortened by warm air from an engine room, in which the internal combustion engine is arranged, is sucked.
  • This cold start phase can also be time-controlled, which takes from the start of the internal combustion engine for a defined period of time.
  • the humidity sensor of the intake system is linked to one of the sensors, which is a pressure sensor for detecting the ambient air pressure.
  • the sensor arranged outside the intake system is a speed sensor for detecting a vehicle speed, which is connected to the evaluation unit.
  • the signal of the, arranged in the Hauptroh Kunststoffeinlass moisture sensor is linked to the signal of the speed sensor, wherein a switching logic is deposited in the evaluation unit, which is both the ride comfort and the protection of the internal combustion engine and the other components.
  • the signal of the moisture sensor arranged in the main raw air inlet is linked in the evaluation unit to at least one further signal of the sensor arranged outside the intake system.
  • switching logic can control the valve, which of course is also a regulation of the valve is included.
  • FIG. 1 shows a suction system in a schematic representation.
  • the intake system has a main intake air inlet 10, a Hilfsroh Kunststoffeinlass 11 and an air filter 12.
  • the main blast air inlet 10 is formed by an opening 13 with a line section 14 adjoining this opening 13.
  • a humidity sensor 15 and a valve 16 are arranged, wherein the humidity sensor 15 is arranged between the opening 13 and the valve 16.
  • the valve 16 is designed as a rotary flap 17, which rotates about an axis 18 arranged in an edge region of the rotary flap 17.
  • the rotary flap 17 is moved by a vacuum box 19.
  • the rotary flap 17 is in the first switching position on the line section 14, whereby the main blast air inlet 10 is opened. In a second switching position, the rotary flap 17 closes the line section 14 sealingly (shown in phantom).
  • the auxiliary air intake 11 has a passage 20 and a pipe section 21 adjoining the passage 20.
  • the passage 20 is disposed at a moisture protected location, the passage 20 being higher in relation to the opening 13 of the main air inlet 10.
  • the Hilfsroh Kunststoffeinlass (11) opens between the rotary valve 17 and the air filter 12 in the line section 14th
  • the moisture sensor 15 is connected to an evaluation unit 22, in which the signal coming from the moisture sensor 15 is linked to a sensor signal of a rain sensor 23, which is likewise connected to the evaluation unit 22.
  • the rain sensor 23 is disposed outside of the intake system and to Detection of raindrops, a function that does not directly affect the intake system provided.
  • the evaluation unit 22 sends a control signal to the vacuum cell 19, whereby the valve 16 is moved and the main blast air inlet 10 is closed or opened.
  • the main blast air inlet 10 is opened, whereby the intake air for an internal combustion engine (not shown) flows in the direction of arrow through the opening 13 into the intake system.
  • the intake air is guided in the conduit section 14 to the air filter 12, where it is cleaned.
  • the purified intake air is directed in a clean air line 24 to the internal combustion engine (not shown). Since the cross section of the line section 14 is greater than the cross section of the pipe section 21, the intake air flows through the larger cross section of the line section 14 in the intake system.
  • the main blast air inlet 10 is closed, whereby the intake air for the internal combustion engine (not shown) flows in dash-dotted arrow direction through the passage 20 into the intake system.
  • the main blast air inlet 10 is half-closed, whereby air flows through the main blast air inlet 10 as well as through the auxiliary blast air inlet 11 into the air intake system.
  • FIG. 2 shows a schematic arrangement of an intake system in a motor vehicle 25.
  • the Figure 1 corresponding components are provided with the same reference numerals.
  • the opening 13 of the main blast air inlet 10 is arranged in the front region of the motor vehicle 25. So that no water penetrating through the opening 13 in the intake system, penetrates to an internal combustion engine 26, the valve 16 is arranged in the main blast air inlet 10.
  • the valve 16 is controlled by a logic stored in the evaluation unit 22.
  • the evaluation unit 22 in the, in the Hauptrohlufteinlass 10 arranged humidity sensor 15 and the rain sensor 23, which is arranged in a bumper 27, further sensors connected to the evaluation unit 22.
  • One of these sensors is a second humidity sensor 28, which is arranged in a wheel housing 29 of the motor vehicle 25.
  • a multi-sensor 30 which detects the state of the internal combustion engine 26 is connected to the evaluation unit 22.
  • This multi-sensor 30 transmits, for example, speed, driving speed, operating temperature and load state of the internal combustion engine 26 to the evaluation unit 22, where optimal control of the valve 16 is generated by the combination of all sensor signals with each other.
  • both the ride comfort for the passengers and the operational safety of the internal combustion engine is taken into account.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Air Conditioning Control Device (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The system has main untreated air inlet (10), a moisture sensor (15), an evaluation unit (22), a main air inlet valve (16), an air filter (12) and an auxiliary untreated air inlet (11). The moisture sensor is arranged in the main inlet to detect moisture occurring there and the evaluation unit is connected to a further sensor outside the system for detecting other functions and forms logic for regulating the valve using the sensor signals. Independent claims are also included for the following: method of operating an induction system.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Ansaugsystem nach dem Oberbegriff des Patentanspruches 1. Außerdem bezieht sich die Erfindung auf ein Verfahren zum Betreiben des oben genannten Ansaugsystems.The invention relates to an intake system according to the preamble of claim 1. Furthermore, the invention relates to a method for operating the above-mentioned intake system.

Es ist aus der JP 57 135 256 ein Ansaugsystem bekannt, welches über einen Hauptrohlufteinlass, einen Hilfsrohlufteinlass und einen Wassersensor verfügt. Der Wassersensor ist in einem Gefäß angeordnet, in welchem sich Wasser ansammeln kann. Sobald das Gefäß mit Wasser gefüllt ist und Wasser in den Hauptrohlufteinlass eindringt, erkennt dies der Wassersensor und sendet ein Signal zum Verschließen des Hauptrohlufteinlasses durch ein, in dem Hauptrohlufteinlass angeordnetes Ventil aus. Das Ventil ist derart gestaltet, dass es beim Verschließen des Hauptrohlufteinlasses den Hilfsrohlufteinlass öffnet.It is known from JP 57 135 256 an intake system having a Hauptrohlufteinlass, a Hilfsrohlufteinlass and a water sensor. The water sensor is arranged in a vessel in which water can accumulate. Once the vessel is filled with water and water enters the main air inlet, the water sensor detects this and sends a signal to close the main air inlet through a valve located in the main air inlet. The valve is designed so that it opens the Hilfsrohlufeinlass when closing the Hauptrohlufteinlasses.

Nachteilig ist bei dieser Ausführung, dass sich Wasser in dem Behälter sammeln muss, damit der Wassersensor schaltet. Hierbei kann sich beispielsweise Kondenzwasser von an das Ansaugsystem angrenzenden Bauteilen in dem Behälter sammeln und diesen auffüllen, wodurch der Wassersensor ein Signal aussendet, ohne dass die Möglichkeit einer Wasseransaugung besteht. Weiterhin kann das Befüllen des Behälters mit Wasser z.B. bei Spritzwasser zu lange dauern, wodurch das Ventil den Hauptrohlufteinlass zu spät verschließt. Einmal in dem Behälter gesammeltes Wasser verursacht das Verschließen des Ventils, auch wenn kein Wasser mehr in der Umgebung vorhanden ist. Somit ist diese Regelung des Ventils ungenau und unzuverlässig.A disadvantage of this design is that water must collect in the container so that the water sensor switches. In this case, for example, condensate water can collect from components adjacent to the intake system in the container and fill it, whereby the water sensor emits a signal without the possibility of water suction. Furthermore, filling the container with water, e.g. take too long to splash, causing the valve to close the main blown air inlet too late. Once collected in the container water causes the closing of the valve, even if there is no more water in the environment. Thus, this control of the valve is inaccurate and unreliable.

Es ist aus der DE 37 36 777 C1 ein weiteres Ansaugsystem gemäß dem Oberbegriff des Anspruch 1 bekannt.It is known from DE 37 36 777 C1 another intake system according to the preamble of claim 1.

Aufgabe der Erfindung ist es daher ein Ansaugsystem zu schaffen, welches über eine zuverlässige und genaue Regelung zur Vermeidung von Wasseransaugung verfügt. Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The object of the invention is therefore to provide an intake system which has a reliable and accurate control to avoid water intake. This object is solved by the features of claim 1.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Ansaugsystem ist in vorteilhafter Weise geeignet, Luft für eine Brennkraftmaschine anzusaugen und eine, für die Brennkraftmaschine schädliche Wasseransaugung zu verhindern. Dieses Ansaugsystem ist für alle Arten von Brennkraftmaschinen mit unterschiedlichsten Verwendungen, insbesondere für Brennkraftmaschinen in Kraftfahrzeugen, geeignet.The intake system according to the invention is advantageously suitable for sucking in air for an internal combustion engine and for preventing a water intake which is detrimental to the internal combustion engine. This intake system is suitable for all types of internal combustion engines with a wide variety of uses, in particular for internal combustion engines in motor vehicles.

Das Ansaugsystem weist einen Hauptrohlufteinlass auf, welcher einerseits über eine Öffnung verfügt und andererseits mit einem Luftfilter korrespondierend verbunden ist. An den Luftfilter schließt abströmseitig eine Reinluftleitung an, welche korrespondierend mit der Brennkraftmaschine verbunden ist. Zwischen der Öffnung und dem Luftfilter können diverse Komponenten angeordnet sein, welche z.B. die Akustik des Ansaugsystems verbessern oder andere Funktionen erfüllen. Die Öffnung, durch welche Luft aus der Umgebung angesaugt wird, ist an einer zur Luftansaugung vorteilhaften Stelle angeordnet. An dieser, zur Luftansaugung vorteilhaften Stelle kann vorzugsweise kühle, sauerstoffhaltige Luft, welche die Verbrennung in der Brennkraftmaschine vorteilhaft beeinflusst, angesaugt werden. Bei einem Kraftfahrzeug kann diese zur Luftansaugung vorteilhafte Stelle beispielsweise im Frontbereich, insbesondere hinter dem Kühler angeordnet sein.The intake system has a Hauptrohlufteinlass, which on the one hand has an opening and on the other hand connected to an air filter corresponding. On the air filter includes downstream of a clean air line, which is connected in correspondence with the internal combustion engine. Between the opening and the air filter various components may be arranged, which e.g. improve the acoustics of the intake system or fulfill other functions. The opening, through which air is sucked in from the environment, is arranged at a location which is advantageous for air intake. Cool air containing oxygen, which advantageously influences the combustion in the internal combustion engine, may preferably be sucked in at this location, which is advantageous for air intake. In a motor vehicle, this point, which is advantageous for air intake, can be arranged, for example, in the front region, in particular behind the radiator.

In dem Hauptrohlufteinlass ist ein Feuchtigkeitssensor angeordnet, welcher in den Hauptrohlufteinlass eintretende Feuchtigkeit, insbesondere Wasser erkennt. Hierbei kann der Feuchtigkeitssensor derart ausgelegt sein, dass er bereits bei Wassergischt, welche z.B. durch ein voranfahrendes Fahrzeug erzeugt wird, oder erst bei Wasserschlag, welcher beim Durchfahren einer Wasserfurt entsteht, das Signal, Wasser im Hauptrohlufteinlass" an die Auswertungseinheit sendet. Entsprechend der geforderten Empfindlichkeit ist dann der Feuchtigkeitssensor zu dimensionieren. Der Feuchtigkeitssensor verfügt über einen Signalausgang, welcher korrespondierend mit einer Auswertungseinheit verbunden ist. Hierbei kann die Verbindung zwischen dem Signalausgang und der Auswertungseinheit direkt durch z.B. ein Kabel, eine Infrarot-Schnittstelle, Funk oder indirekt über zwischengeschaltete Bauteile wie z.B. Steuerelektroniken oder Signalverstärker erfolgen. Die Verbindung überträgt das Signal des Feuchtigkeitssensors an die Auswertungseinheit, wobei eine möglichst schnelle Signalübertragung vorteilhaft ist. Beim Start der Brennkraftmaschine kann die Funktionsfähigkeit des Feuchtigkeitssensors getestet und ein Kontrollsignal ausgegeben werden.In the main blast air inlet a humidity sensor is arranged which detects moisture entering the main blast air inlet, in particular water. In this case, the moisture sensor can be designed in such a way that it already transmits the signal "water in the main air inlet" to the evaluation unit in the case of water spray, which is generated, for example, by a preceding vehicle, or only in the case of water hammer, which occurs when passing through a water ford The humidity sensor has a signal output which is connected correspondingly to an evaluation unit, whereby the connection between the signal output and the evaluation unit can be made directly by eg a cable, an infrared interface, radio or indirectly via intermediate components The connection transmits the signal of the moisture sensor to the evaluation unit, the fastest possible signal transmission being advantageous Humidity sensor is tested and a control signal is output.

Die Auswertungseinheit ist mit mindestens einem weiteren Sensor, welcher außerhalb des Ansaugsystems angeordnet und zur Erfassung anderer, das Ansaugsystem nicht direkt betreffender, Funktionen vorgesehen ist, korrespondierend verbunden. In der Auswertungseinheit ist durch das Signal des Feuchtigkeitssensors in Verbindung mit dem Signal des außerhalb des Ansaugsystems angeordneten Sensors eine Schaltlogik erzeugbar. Das Signal des Feuchtigkeitssensors kann z.B. durch das Signal des externen Sensors, wenn dieser ebenfalls Wasser erkennen kann, bestätigt oder negiert. Andere Sensoren, welche keine Feuchtigkeit sondern Umgebungsbedingungen erkennen, können z.B. das Verschließen des Hauptrohlufteinlasses beschleunigen oder verlangsamen. Entsprechend der in der Auswertungseinheit definierten Schaltlogik wird ein Steuersignal ausgegeben. Die Funktionsfähigkeit des außerhalb des Ansaugsystems angeordneten Sensors kann z.B. beim Start der Brennkraftmaschine getestet und ein entsprechendes Kontrollsignal ausgegeben werden.The evaluation unit is connected to at least one further sensor, which is arranged outside of the intake system and for detecting other, the intake system is not directly relevant functions provided correspondingly connected. In the evaluation unit, a switching logic can be generated by the signal of the humidity sensor in conjunction with the signal of the sensor arranged outside the intake system. The signal of the humidity sensor may e.g. by the signal of the external sensor, if this can also detect water, confirmed or negated. Other sensors which do not detect humidity but environmental conditions may e.g. accelerate or slow down the closing of the main air intake. A control signal is output in accordance with the switching logic defined in the evaluation unit. The operability of the sensor located outside the intake system may be e.g. tested at the start of the engine and a corresponding control signal is output.

In dem Hauptrohlufteinlass ist ein Ventil beweglich angeordnet, welches bei Feuchtigkeits- bzw. Wassereintritt den Hauptrohlufteinlass dichtend verschließen kann. Dieses Ventil ist korrespondierend mit der Auswertungseinheit verbunden, wobei diese Verbindung direkt durch z.B. ein Kabel, eine Infrarot-Schnittstelle, Funk oder indirekt über zwischengeschaltete Bauteile wie z.B. Steuerelektroniken oder Signalverstärker erfolgen kann. Das von der Auswertungselektronik ausgegebene Steuersignal veranlasst z.B. ein schnelles, langsames oder teilweises Verschließen des Hauptrohlufteinlasses durch das Ventil, welches z.B. als Drehschieber, einteilige oder mehrteilige Klappe ausgebildet sein kann. Zum Bewegen des Ventils können unterschiedlichste Antriebe, wie z.B. pneumatische, hydraulische, elektromagnetische oder elektrische Antriebe genutzt werden.In the Hauptrohlufteinlass a valve is movably arranged, which can close the main raw air inlet when moisture or water ingress sealing. This valve is connected in correspondence with the evaluation unit, this connection being made directly by e.g. a cable, an infrared interface, radio or indirectly via interconnected components such as e.g. Control electronics or signal amplifier can be done. The control signal output by the evaluation electronics causes e.g. a fast, slow or partial closing of the main blast air inlet by the valve, which e.g. can be designed as a rotary valve, one-piece or multi-part flap. To move the valve, a variety of drives, such. pneumatic, hydraulic, electromagnetic or electric drives are used.

Das Ansaugsystem weist neben dem Hauptrohlufteinlass noch einen Hilfsrohlufteinlass auf, welcher einerseits über einen Durchlass verfügt und andererseits korrespondierend mit der, an den Luftfilter anschließenden, Reinluftleitung verbunden ist. Der Durchlass ist an einer feuchtigkeitsgeschützten Stelle angeordnet. Weiterhin kann der Durchlass bei besonderen Ausführungen einem Wasserabscheider nachgeordnet sein. Außerdem kann der Durchlass des Hilfsrohlufteinlasses im Verhältnis zu der Öffnung des Hauptrohlufteinlasses höher angeordnet sein. Eine feuchtigkeitsgeschützte Stelle in einem Kraftfahrzeug kann z.B. der Motorraum oder das Lüftungssystem für den Fahrgastinnenraum sein. Durch diesen Hilfsrohlufteinlass kann, sobald der Hauptrohlufteinlass verschlossen ist, Luft in das Ansaugsystem einströmen. Der Hilfsrohlufteinlass kann im Querschnitt im Verhältnis zu dem Hauptrohlufteinlass größer, gleich oder kleiner sein. Bei einem kleineren Querschnitt bzw. einem großenren Luftwiderstand des Hilfsrohlufteinlasses kann dieser immer unverschlossen sein, da bei geöffnetem Hauptrohlufteinlass die Luft immer durch den Hauptrohlufteinlass mit dem größeren Querschnitt bzw. geringeren Luftwiderstand in das Ansaugsystem einströmt. Bei einer vorteilhaften Ausführung ist der Hilfsrohlufteinlass zumindest teilweise verschließbar ausgeführt, wobei das Ventil, welches im Hauptrohlufteinlass angeordnet ist, auch zum Verschließen des Hilfsrohlufteinlasses dienen kann. Bei anderen Ausführungen kann auch ein separat ausgeführtes Verschlusselement zum Verschließen des Hilfsrohlufteinlasses vorgesehen sein.The intake system has in addition to the Hauptrohlufteinlass still a Hilfsrohlufteinlass, which on the one hand has a passage and on the other hand corresponding to the, connected to the air filter, clean air line is connected. The passage is arranged in a moisture-proof location. Furthermore, the passage may be arranged downstream of a water separator in special embodiments. In addition, the passage of the auxiliary raw air inlet may be higher in relation to the opening of the main raw air inlet. A moisture-proof point in a motor vehicle can be, for example, the engine compartment or the ventilation system for the passenger compartment. Through this auxiliary air intake, once the main air intake is closed, air can flow into the intake system. The auxiliary blast air inlet may be larger, equal or smaller in cross-section relative to the main blast air inlet. At a smaller one The cross section or a larger air resistance of the Hilfsrohlufteinlasses this can always be unlocked, since with the Hauptrohlufteinlass open, the air always flows through the Hauptrohlufteinlass with the larger cross-section or lower air resistance in the intake system. In an advantageous embodiment of the Hilfsrohlufteinlass is performed at least partially closed, wherein the valve which is arranged in the Hauptrohlufteinlass, can also serve to close the Hilfsrohlufteinlasses. In other embodiments, a separately executed closure element may be provided for closing the Hilfsrohlufteinlasses.

Gemäß einer vorteilhaften Ausgestaltung ist der außerhalb des Ansaugsystems angeordnete Sensor ein Regensensor, welcher z.B. an einer Windschutzscheibe eines Kraftfahrzeuges angeordnet ist und auftreffende Regentropfen oder nassem bzw. feuchten Schnee erfasst. Der Sensor kann auch mit einem Scheibenwischer eines Kraftfahrzeuges in Verbindung stehen und die Betätigung des Scheibenwischers erfassen. Der Regensensor übermittelt ein Signal, welches in der Auswertungseinheit zum Bestätigen des Signals von dem Feuchtigkeitssensor aus dem Hauptrohlufteinlass genutzt werden kann. Hierbei sind vier Verknüpfungsvarianten möglich:According to an advantageous embodiment, the sensor arranged outside the intake system is a rain sensor, which, e.g. is arranged on a windshield of a motor vehicle and detects incident raindrops or wet or wet snow. The sensor may also communicate with a windshield wiper of a motor vehicle and detect the operation of the windshield wiper. The rain sensor transmits a signal which can be used in the evaluation unit for confirming the signal from the humidity sensor from the main raw air inlet. Here are four linkage variants possible:

Erste Variante: Feuchtigkeits- und Regensensor melden kein Wasser, wodurch das Steuersignal der Auswertungseinheit den Hauptrohlufteinlass öffnet bzw. geöffnet hält und die Luft durch diesen in das Ansaugsystem einströmen kann.First variant: Moisture and rain sensor do not report water, whereby the control signal of the evaluation unit opens the main blast air inlet or keeps open and the air can flow through this into the intake system.

Zweite Variante: Feuchtigkeits- und Regensensor melden Wasser, wodurch das Steuersignal der Auswertungseinheit das Verschließen des Hauptrohlufteinlasses veranlasst. Die Luft muss durch den Hilfsrohlufteinlass in das Ansaugsystem einströmen.Second variant: moisture and rain sensor report water, causing the control signal of the evaluation unit causes the closing of the main raw air inlet. The air must flow through the auxiliary air intake into the intake system.

Dritte Variante: Feuchtigkeitssensor meldet Wasser, Regensensor meldet kein Wasser. Bei dieser Variante kann z.B. der Hauptrohlufteinlass teilweise geschlossen werden, wodurch feuchte Luft mit trockener Luft aus dem Hilfsrohlufteinlass vermischt wird. Das Mischungsverhältnis kann bei besonderen Ausführungen nachgeregelt werden, wenn der Feuchtigkeitssensor weiterhin Wasser meldet. Diese Nachregelung kann zum vollständigen Verschließen des Hauptrohlufteinlasses führen.Third variant: Moisture sensor reports water, rain sensor does not report water. In this variant, e.g. the main blast air inlet is partially closed, whereby humid air is mixed with dry air from the auxiliary blast air inlet. The mixing ratio can be adjusted in special versions, if the humidity sensor continues to report water. This readjustment can lead to the complete closing of the main blast air inlet.

Vierte Variante: Feuchtigkeitssensor meldet kein Wasser, Regensensor meldet Wasser. Bei dieser Variante kann vorsichtshalber der Hauptrohlufteinlass verschlossen werden oder aber geöffnet bleiben. Diese Entscheidung kann z.B. in einem Pflichtenheft des Brennkraftmaschinenherstellers definiert sein.Fourth variant: Moisture sensor does not report water, rain sensor reports water. In this variant, as a precaution, the Hauptrohlufteinlass be closed or remain open. This decision can be defined for example in a specification of the engine manufacturer.

Es ist vorteilhaft, dass der Sensor, welcher außerhalb des Ansaugsystems angeordnet ist, ein Feuchtigkeitssensor zur Erfassung eines Umgebungszustandes ist. Hierbei stellt eine Anordnung des Feuchtigkeitssensors z.B. an einer Stoßstange oder in einem Radkasten eines Kraftfahrzeuges vorteilhafte Möglichkeiten dar. Somit kann der Umgebungszustand z.B. der Straße, auf welcher das Fahrzeug fährt erfasst werden. Das Signal dieses außerhalb des Ansaugsystems angeordneten Feuchtigkeitssensors wird in der Auswertungseinheit mit dem Signal des, in dem Hauptrohlufteinlass angeordneten Feuchtigkeitssensors verknüpft. Die Verknüpfung dieser beiden Sensoren ergeben vier Varianten, welche entsprechend den Anforderungen zum Öffnen, teilweisen oder vollständigen Verschließen des Hauptrohlufteinlasses genutzt werden können. Eine Verknüpfung der beiden Feuchtigkeitssensoren mit dem Regensensor ermöglicht weitere Varianten, wodurch eine bessere Logik zur Steuerung des Ventils erzeugt werden kann.It is advantageous that the sensor, which is arranged outside the intake system, is a moisture sensor for detecting an environmental condition. Here, an arrangement of the humidity sensor e.g. on a bumper or in a wheel arch of a motor vehicle advantageous possibilities. Thus, the environmental condition, e.g. the road on which the vehicle is traveling. The signal of this moisture sensor arranged outside the intake system is linked in the evaluation unit to the signal of the humidity sensor arranged in the main raw air inlet. The combination of these two sensors results in four variants, which can be used according to the requirements for opening, partial or complete closing of the Hauptrohlufteinlasses. A combination of the two humidity sensors with the rain sensor allows further variants, whereby a better logic for controlling the valve can be generated.

Bei einer weiteren Ausgestaltung der Erfindung ist der außerhalb des Ansaugsystems angeordnete Sensor ein Schwimmer, welcher zur Erfassung eines Umgebungszustandes vorgesehen ist. Dieser Schwimmer reagiert auf Wasserschlag, wenn z.B. eine Wasserwelle auf das Ansaugsystem bzw. die Brennkraftmaschine zu kommt oder ein Kraftfahrzeug durch ein Gewässer fährt. Das Schwimmersignal wird mit dem Signal des im Hauptrohlufteinlasses angeordneten Feuchtigkeitssensors verknüpft, wobei zusätzlich noch andere Signale von anderen Sensoren mitverknüpft werden können.In a further embodiment of the invention, the sensor arranged outside the intake system is a float, which is provided for detecting an environmental condition. This float responds to water hammer when e.g. a water wave to the intake system or the internal combustion engine comes to or drives a motor vehicle through a body of water. The float signal is linked to the signal of the arranged in the Hauptrohlufteinlasses moisture sensor, in addition, other signals from other sensors can be mitverknüpft.

Es ist vorteilhaft, dass der außerhalb des Ansaugsystems angeordnete Sensor zur Erfassung von Kenndaten der Brennkraftmaschine, insbesondere Drehzahl, Temperatur, Luftdurchsatz, vorgesehen ist. Durch die Verknüpfung der Kenndaten der Brennkraftmaschine mit dem Signal des in dem Hauptrohlufteinlass angeordneten Feuchtigkeitssensors kann das Ventil zum Verschließen des Hauptrohlufteinlasses derart gesteuert werden, dass für die Brennkraftmaschine keine abrupten Luftzuführungsänderungen entstehen. Wenn die Brennkraftmaschine z.B. mit Volllast ein Kraftfahrzeug antreibt und die Luftzuführung in dem Ansaugsystem schlagartig von dem Hauptrohlufteinlass auf den Hitfsrohlufteinlass umgestellt wird, beeinträchtigt dies den Fahrkomfort, da ein Ruck in dem Fahrgastinnenraum zu spüren ist. Hierbei verbessert eine langsame Umstellung der Luftzuführung von dem Hauptrohlufteinlass auf den Hilfsrohlufteinlass den Fahrkomfort. Sofern eine langsame Umstellung der Luftzuführung realisierbar ist, sollte diese angestrebt wer den. Bei Umgebungseinflüssen, wie z.B. Wasserschlag, welche zu einer Beschädigung der Brennkraftmaschine oder anderen Komponenten führen ist eine schlagartige Umschaltung zum Schutz der Brennkraftmaschine bzw. anderer feuchtigkeitsempfindlicher Komponenten erforderlich, wobei ein Verlust im Fahrkomfort hingenommen werden kann.It is advantageous that the sensor arranged outside the intake system is provided for detecting characteristic data of the internal combustion engine, in particular rotational speed, temperature, air flow rate. By linking the characteristic data of the internal combustion engine with the signal of the arranged in the Hauptrohlufteinlass humidity sensor, the valve for closing the Hauptrohlufteinlasses can be controlled so that the combustion engine no abrupt air supply changes. For example, when the internal combustion engine drives a motor vehicle at full load and the air supply in the intake system is suddenly switched from the main air intake to the main air intake, this impairs the ride comfort because a jolt is felt in the passenger compartment. Here, a slow changeover of the air supply from the Hauptrohlufteinlass on the Hilfsrohlufteinlass improves ride comfort. If a slow change of the air supply can be realized, this should be the goal. In the case of environmental influences, such as water hammer, which lead to damage to the internal combustion engine or other components is a sudden changeover to protect the engine or other moisture-sensitive components required, with a loss in ride comfort can be accepted.

Durch die Verknüpfung des Signals von dem in dem Hauptrohlufteinlass angeordneten Feuchtigkeitssensors mit z.B. der Betriebstemperatur der Brennkraftmaschine kann die Kaltstartphase verkürzt werden, indem warme Luft aus einem Motorraum, in welchem die Brennkraftmaschine angeordnet ist, angesaugt wird. Diese Kaltstartphase kann auch zeitgesteuert sein, welche ab dem Start der Brennkraftmaschine für eine definierte Zeitspanne in Anspruch nimmt.By linking the signal from the humidity sensor disposed in the main raw air inlet with e.g. the operating temperature of the internal combustion engine, the cold start phase can be shortened by warm air from an engine room, in which the internal combustion engine is arranged, is sucked. This cold start phase can also be time-controlled, which takes from the start of the internal combustion engine for a defined period of time.

Gemäß einer weiteren Ausgestaltung ist der Feuchtigkeitssensor, des Ansaugsystems mit einem der Sensor verknüpft, welcher ein Drucksensor zur Erfassung des Umgebungsluftdruckes ist.According to a further embodiment, the humidity sensor of the intake system is linked to one of the sensors, which is a pressure sensor for detecting the ambient air pressure.

Es ist vorteilhaft, dass der außerhalb des Ansaugsystems angeordnete Sensor ein Geschwindigkeitssensor zur Erfassung einer Fahrzeuggeschwindigkeit ist, welcher mit der Auswertungseinheit verbunden ist. In der Auswertungseinheit wird das Signal des, in dem Hauptrohlufteinlass angeordneten Feuchtigkeitssensor mit dem Signal des Geschwindigkeitssensors verknüpft, wobei eine Schaltlogik in der Auswertungseinheit hinterlegt ist, welche sowohl dem Fahrkomfort sowie dem Schutz der Brennkraftmaschine und der anderen Komponenten gerecht wird.It is advantageous that the sensor arranged outside the intake system is a speed sensor for detecting a vehicle speed, which is connected to the evaluation unit. In the evaluation unit, the signal of the, arranged in the Hauptrohlufteinlass moisture sensor is linked to the signal of the speed sensor, wherein a switching logic is deposited in the evaluation unit, which is both the ride comfort and the protection of the internal combustion engine and the other components.

Bei einem Verfahren zum Betreiben eines Ansaugsystems wird das Signal des im Hauptrohlufteinlass angeordneten Feuchtigkeitssensors in der Auswertungseinheit mit mindestens einem weiteren Signal des außerhalb des Ansaugsystems angeordneten Sensors verknüpft. Entsprechend den Anforderungen an das Ansaugsystem und die Brennkraftmaschine kann die in der Auswertungseinheit hinterlegten Schaltlogik das Ventil steuern, wobei selbstverständlich auch eine Regelung des Ventils beinhaltet ist. Durch die Verknüpfung mehrer Signale miteinander kann ein exaktes und zuverlässiges Verschließen des Hauptrohlufteinlasses erfolgen, wobei unnötige Verschließvorgänge durch Berücksichtigung externer Sensorsignale verhindert werden. Weiterhin können die Verschließvorgänge an die jeweilige Situation eines Kraftfahrzeuges wie z.B. Geschwindigkeit, Drehzahl, Temperatur angepasst werden.In a method for operating an intake system, the signal of the moisture sensor arranged in the main raw air inlet is linked in the evaluation unit to at least one further signal of the sensor arranged outside the intake system. According to the requirements of the intake system and the internal combustion engine deposited in the evaluation unit switching logic can control the valve, which of course is also a regulation of the valve is included. By linking a plurality of signals together, a precise and reliable closing of the main raw air inlet can take place, whereby unnecessary closing processes are prevented by taking account of external sensor signals. Furthermore, the closing operations to the respective situation of a motor vehicle such. Speed, speed, temperature can be adjusted.

Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen au-βer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred embodiments of the invention are au-βer from the claims also from the description and the drawings, wherein the individual features in each case alone or in the form of sub-combinations be realized in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigt

Figur 1
ein Ansaugsystem und
Figur 2
eine schematische Anordnung des Ansaugsystems in einem Kraftfahrzeug.
Further details of the invention are described in the drawing with reference to schematic embodiments. This shows
FIG. 1
an intake system and
FIG. 2
a schematic arrangement of the intake system in a motor vehicle.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt ein Ansaugsystem in schematischer Darstellung. Das Ansaugsystem weist einen Hauptrohlufteinlass 10, einen Hilfsrohlufteinlass 11 und einen Luftfilter 12 auf. Der Hauptrohlufteinlass 10 wird durch eine Öffnung 13 mit einem, an diese Öffnung 13 anschließenden Leitungsabschnitt 14 gebildet. In dem Leitungsabschnitt 14 ist ein Feuchtigkeitssensor 15 und ein Ventil 16 angeordnet, wobei der Feuchtigkeitssensor 15 zwischen der Öffnung 13 und dem Ventil 16 angeordnet ist. Das Ventil 16 ist bei diesem Ausführungsbeispiel als Drehklappe 17, welche sich um eine, in einem Randbereich der Drehklappe 17 angeordneten Achse 18 dreht, ausgeführt. Die Drehklappe 17 wird von einer Unterdruckdose 19 bewegt. Die Drehklappe 17 liegt in der ersten Schaltstellung an dem Leitungsabschnitt 14 an, wodurch der Hauptrohlufteinlass 10 geöffnet ist. In einer zweiten Schaltstellung verschließt die Drehklappe 17 den Leitungsabschnitt 14 dichtend (strichpunktiert dargestellt).Figure 1 shows a suction system in a schematic representation. The intake system has a main intake air inlet 10, a Hilfsrohlufteinlass 11 and an air filter 12. The main blast air inlet 10 is formed by an opening 13 with a line section 14 adjoining this opening 13. In the conduit section 14, a humidity sensor 15 and a valve 16 are arranged, wherein the humidity sensor 15 is arranged between the opening 13 and the valve 16. In this exemplary embodiment, the valve 16 is designed as a rotary flap 17, which rotates about an axis 18 arranged in an edge region of the rotary flap 17. The rotary flap 17 is moved by a vacuum box 19. The rotary flap 17 is in the first switching position on the line section 14, whereby the main blast air inlet 10 is opened. In a second switching position, the rotary flap 17 closes the line section 14 sealingly (shown in phantom).

Der Hilfsrohlufteinlass 11 weist einen Durchlass 20 und einen, an den Durchlass 20 anschließenden Rohrabschnitt 21 auf. Der Durchlass 20 ist an einer vor Feuchtigkeit geschützten Stelle angeordnet, wobei der Durchlass 20 im Verhältnis zu der Öffnung 13 des Hauptrohlufteinlasses 10 höher angeordnet ist. Der Hilfsrohlufteinlass (11) mündet zwischen der Drehklappe 17 und dem Luftfilter 12 in den Leitungsabschnitt 14.The auxiliary air intake 11 has a passage 20 and a pipe section 21 adjoining the passage 20. The passage 20 is disposed at a moisture protected location, the passage 20 being higher in relation to the opening 13 of the main air inlet 10. The Hilfsrohlufteinlass (11) opens between the rotary valve 17 and the air filter 12 in the line section 14th

Der Feuchtigkeitssensor 15 ist mit einer Auswertungseinheit 22 verbunden, in welcher das von dem Feuchtigkeitssensor 15 kommende Signal mit einem Sensorsignal eines Regensensors 23, welcher ebenfalls mit der Auswertungseinheit 22 verbunden ist, verknüpft wird. Der Regensensor 23 ist außerhalb des Ansaugsystems angeordnet und zur Erfassung von Regentropfen, eine das Ansaugsystem nicht direkt betreffende Funktion, vorgesehen. Entsprechend einer in der Auswertungseinheit 22 hinterlegten Logik sendet die Auswertungseinheit 22 ein Steuersignal an die Unterdruckdose 19, wodurch das Ventil 16 bewegt wird und der Hauptrohlufteinlass 10 verschlossen bzw. geöffnet wird. Steuersignal Feuchtigkeitssensorsignal Regensensorsignal Hauptrohlufteinlass auf kein Wasser kein Wasser Hauptrohlufteinlass zu Wasser Wasser Hauptrohlufteinlass halb zu kein Wasser Wasser Hauptrohlufteinlass zu Wasser kein Wasser In der ersten Schaltstellung des Ventils 16 ist der Hauptrohlufteinlass 10 geöffnet, wodurch die Ansaugluft für eine Brennkraftmaschine (nicht dargestellt) in Pfeilrichtung durch die Öffnung 13 in das Ansaugsystem einströmt. Die Ansaugluft wird in dem Leitungsabschnitt 14 zu dem Luftfilter 12 geführt, wo sie gereinigt wird. Die gereinigte Ansaugluft wird in einer Reinluftleitung 24 zu der Brennkraftmaschine (nicht dargestellt) geleitet. Da der Querschnitt des Leitungsabschnittes 14 größer ist, als der Querschnitt des Rohrabschnittes 21 strömt die Ansaugluft durch den größeren Querschnitt des Leitungsabschnittes 14 in das Ansaugsystem ein.The moisture sensor 15 is connected to an evaluation unit 22, in which the signal coming from the moisture sensor 15 is linked to a sensor signal of a rain sensor 23, which is likewise connected to the evaluation unit 22. The rain sensor 23 is disposed outside of the intake system and to Detection of raindrops, a function that does not directly affect the intake system provided. According to a stored in the evaluation unit 22 logic, the evaluation unit 22 sends a control signal to the vacuum cell 19, whereby the valve 16 is moved and the main blast air inlet 10 is closed or opened. control signal Humidity sensor signal Rain sensor signal Main air intake on no water no water Main duct intake to water water Main air intake half closed no water water Main duct intake to water no water In the first switching position of the valve 16, the main blast air inlet 10 is opened, whereby the intake air for an internal combustion engine (not shown) flows in the direction of arrow through the opening 13 into the intake system. The intake air is guided in the conduit section 14 to the air filter 12, where it is cleaned. The purified intake air is directed in a clean air line 24 to the internal combustion engine (not shown). Since the cross section of the line section 14 is greater than the cross section of the pipe section 21, the intake air flows through the larger cross section of the line section 14 in the intake system.

In der zweiten Schaltstellung des Ventils 16 ist der Hauptrohlufteinlass 10 geschlossen, wodurch die Ansaugluft für die Brennkraftmaschine (nicht dargestellt) in strich-punktierter Pfeilrichtung durch den Durchlass 20 in das Ansaugsystem einströmt.In the second switching position of the valve 16, the main blast air inlet 10 is closed, whereby the intake air for the internal combustion engine (not shown) flows in dash-dotted arrow direction through the passage 20 into the intake system.

In der dritten Schaltstellung des Ventils 16 ist der Hauptrohlufteinlass 10 halb geschlossen, wodurch sowohl durch den Hauptrohlufteinlass 10, als auch durch den Hilfsrohlufteinlass 11 Luft in das Ansaugsystem einströmt.In the third switching position of the valve 16, the main blast air inlet 10 is half-closed, whereby air flows through the main blast air inlet 10 as well as through the auxiliary blast air inlet 11 into the air intake system.

In Figur 2 ist eine schematische Anordnung eines Ansaugsystems in einem Kraftfahrzeug 25 dargestellt. Der Figur 1 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Die Öffnung 13 des Hauptrohlufteinlass 10 ist im Frontbereich des Kraftfahrzeuges 25 angeordnet. Damit kein Wasser, welches durch die Öffnung 13 in das Ansaugsystem eindringt, bis zu einer Brennkraftmaschine 26 vordringt, ist das Ventil 16 in dem Hauptrohlufteinlass 10 angeordnet. Das Ventil 16 wird durch eine, in der Auswertungseinheit 22 hinterlegten Logik gesteuert. Hierzu sind bei diesem Ausführungsbeispiel neben dem, in dem Hauptrohlufteinlass 10 angeordneten Feuchtigkeitssensor 15 und dem Regensensor 23, welcher in einer Stoßstange 27 angeordnet ist, noch weitere Sensoren mit der Auswertungseinheit 22 verbunden. Einer dieser Sensoren ist ein zweiter Feuchtigkeitssensor 28, welcher in einem Radkasten 29 des Kraftfahrzeuges 25 angeordnet ist. Weiterhin ist ein Multisensor 30, welcher den Zustand der Brennkraftmaschine 26 erfasst mit der Auswertungseinheit 22 verbunden. Dieser Multisensor 30 übermittelt z.B. Drehzahl, Fahrgeschwindigkeit, Betriebstemperatur und Lastzustand der Brennkraftmaschine 26 an die Auswertungseinheit 22, wo durch die Verknüpfung aller Sensorsignale miteinander eine optimale Steuerung des Ventils 16 erzeugt wird. Hierbei wird sowohl der Fahrkomfort für die Passagiere als auch die Betriebssicherheit der Brennkraftmaschine berücksichtigt.FIG. 2 shows a schematic arrangement of an intake system in a motor vehicle 25. The Figure 1 corresponding components are provided with the same reference numerals. The opening 13 of the main blast air inlet 10 is arranged in the front region of the motor vehicle 25. So that no water penetrating through the opening 13 in the intake system, penetrates to an internal combustion engine 26, the valve 16 is arranged in the main blast air inlet 10. The valve 16 is controlled by a logic stored in the evaluation unit 22. In addition to this are in this embodiment the, in the Hauptrohlufteinlass 10 arranged humidity sensor 15 and the rain sensor 23, which is arranged in a bumper 27, further sensors connected to the evaluation unit 22. One of these sensors is a second humidity sensor 28, which is arranged in a wheel housing 29 of the motor vehicle 25. Furthermore, a multi-sensor 30 which detects the state of the internal combustion engine 26 is connected to the evaluation unit 22. This multi-sensor 30 transmits, for example, speed, driving speed, operating temperature and load state of the internal combustion engine 26 to the evaluation unit 22, where optimal control of the valve 16 is generated by the combination of all sensor signals with each other. Here, both the ride comfort for the passengers and the operational safety of the internal combustion engine is taken into account.

Claims (10)

  1. Intake system for an internal combustion engine, more especially of an automotive vehicle, said intake system including a main unfiltered air inlet (10), a moisture sensor (15), an evaluating unit (22), a valve (16), an air filter (12) and an auxiliary unfiltered air inlet (11),
    - wherein at one end of the main unfiltered air inlet (10) there is an opening (13) which is disposed at an advantageous position for the air intake, and the other end the main unfiltered air inlet is connected correspondingly to the air filter (12),
    - wherein on the outgoing side of the air filter (12) there is disposed a filtered air line (24), which is connected correspondingly to the internal combustion engine,
    - wherein the moisture sensor (15) includes a signal output, which is connected correspondingly to the evaluating unit (22),
    - wherein the valve (16) is disposed so as to be displaceable in the main unfiltered air inlet (10) and is connected correspondingly to the evaluating unit (22), wherein the main unfiltered air inlet (10) is closable in a sealing manner by means of the valve (16),
    - wherein at one end of the auxiliary unfiltered air inlet (11) there is a passage (20) which is disposed at a position protected from moisture, and the other end of the auxiliary unfiltered air inlet is connected correspondingly to the filtered air line (24),
    characterised in that
    the moisture sensor (15) is disposed in the main unfiltered air inlet (10) in such a manner that moisture entering the main unfiltered air inlet (10) can be sensed, and in that the evaluating unit (22) is connected correspondingly to at least one additional sensor (23, 28, 30), which is disposed externally of the intake system and is provided for detecting other functions, a logic thereby being producible in the evaluating unit (22) by means of the signal of the moisture sensor (15) in conjunction with the signal of the sensor (23, 28, 30) and it being possible to regulate the valve (16) with said logic.
  2. Intake system according to claim 1, characterised in that the sensor (23, 28, 30) is a rain sensor, which is disposed externally of the intake system.
  3. Intake system according to claim 1 or 2, characterised in that the sensor (23, 28, 30) is a moisture sensor for detecting an environmental state and is disposed externally of the intake system, more especially on a bumper of an automotive vehicle.
  4. Intake system according to one of the preceding claims, characterised in that the sensor (23, 28, 30) is a float for detecting an environmental state externally of the intake system
  5. Intake system according to one of the preceding claims, characterised in that the sensor (23, 28, 30) is provided to detect characteristic data of the internal combustion engine, more especially speed, temperature and rate of air flow.
  6. Intake system according to one of the preceding claims, characterised in that the sensor (23, 28, 30) is a pressure sensor, which is for detecting the pressure of the ambient air.
  7. Intake system according to one of the preceding claims, characterised in that the sensor (23, 28, 30) is a speed sensor, which is provided to detect the speed of a vehicle.
  8. Intake system according to one of the preceding claims, characterised in that the auxiliary unfiltered air inlet (11) is closable at least partially.
  9. Intake system according to one of the preceding claims, characterised in that, corresponding to the switching logic combined to form a signal in the evaluating unit (22),
    - the main unfiltered air inlet (10) is completely open in a first position of the valve (16),
    - the main unfiltered air inlet (10) is sealingly closed in a second position of the valve (16),
    - the main unfiltered air inlet (10) is partially open in a third position of the valve (16).
  10. Method for operating an intake system in accordance with one of the preceding claims, characterised in that the signal of the moisture sensor (15) is compared in the evaluating unit (22) with at least one additional signal of a sensor (23, 28, 30) and controls the valve (15) corresponding to the switching logic stored in the evaluating unit (22).
EP01124650A 2000-10-26 2001-10-16 Inlet manifold Expired - Lifetime EP1201910B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10053146A DE10053146A1 (en) 2000-10-26 2000-10-26 intake system
DE10053146 2000-10-26

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EP1201910A2 EP1201910A2 (en) 2002-05-02
EP1201910A3 EP1201910A3 (en) 2003-01-08
EP1201910B1 true EP1201910B1 (en) 2006-04-26

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US (1) US6510832B2 (en)
EP (1) EP1201910B1 (en)
JP (1) JP2002180921A (en)
AT (1) ATE324522T1 (en)
BR (1) BR0105646A (en)
DE (2) DE10053146A1 (en)
ES (1) ES2291261T3 (en)

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Publication number Publication date
EP1201910A3 (en) 2003-01-08
ATE324522T1 (en) 2006-05-15
DE10053146A1 (en) 2002-05-08
US20020083916A1 (en) 2002-07-04
US6510832B2 (en) 2003-01-28
ES2291261T3 (en) 2008-03-01
JP2002180921A (en) 2002-06-26
EP1201910A2 (en) 2002-05-02
DE50109611D1 (en) 2006-06-01
BR0105646A (en) 2002-07-23

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