EP3091217A1 - Dispositif de filtration pour l'air aspiré par un moteur à combustion interne à drainage d'eau résiduelle - Google Patents

Dispositif de filtration pour l'air aspiré par un moteur à combustion interne à drainage d'eau résiduelle Download PDF

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Publication number
EP3091217A1
EP3091217A1 EP16168525.0A EP16168525A EP3091217A1 EP 3091217 A1 EP3091217 A1 EP 3091217A1 EP 16168525 A EP16168525 A EP 16168525A EP 3091217 A1 EP3091217 A1 EP 3091217A1
Authority
EP
European Patent Office
Prior art keywords
air
valve
box
filtering device
drainage
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
EP16168525.0A
Other languages
German (de)
English (en)
Other versions
EP3091217B1 (fr
Inventor
Gaetano Bergami
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.)
BMC SRL
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BMC SRL
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Filing date
Publication date
Application filed by BMC SRL filed Critical BMC SRL
Publication of EP3091217A1 publication Critical patent/EP3091217A1/fr
Application granted granted Critical
Publication of EP3091217B1 publication Critical patent/EP3091217B1/fr
Active legal-status Critical Current
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
    • F02M35/02—Air cleaners
    • 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
    • F02M35/02—Air cleaners
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • 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
    • F02M35/02—Air cleaners
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/088—Water, snow or ice proofing; Separation or drainage of water, snow or ice

Definitions

  • the present invention relates to a filtering device for the air taken in by an internal combustion engine.
  • a filtering device for the air taken in by an internal combustion engine comprises an air-box, usually made of plastic material, which houses an internal filter; the filter divides the air-box in an inlet chamber, which is arranged upstream of the filter and communicates with the external environment through an inlet opening, and an outlet chamber, which is arranged downstream of the filter and communicates with the engine intake system through an outlet opening.
  • a lower wall of the air-box at the inlet chamber has a drainage through-hole for the drainage of any residual water inside the air-box (both due to the condensation of the moisture of the air taken in and to the direct entry of raindrops).
  • the air inlet collecting the air that is fed to the inlet opening is arranged at the front of the vehicle; in this way, when the vehicle is in motion, the air pressure against the air inlet generates an overpressure inside the air-box; the higher the vehicle speed, the greater the overpressure.
  • This overpressure inside the air-box increases the filling of the cylinders of the internal combustion engine and therefore increases the power generated by the internal combustion engine.
  • the drainage hole puts in direct communication the inlet chamber of the air-box with the external environment, thus determining a decrease of the pressurization inside the air-box when the motion of the vehicle pressurizes the air-box.
  • the drainage hole may be provided with an elastic duct, which is normally closed or semiclosed and at the same time allows the (slow) descent by gravity of water to reduce the negative effect of the drainage hole on the pressurization inside the air-box.
  • the elastic duct constitutes a passive valve which is normally closed and is controlled by the water pressure that builds up in the elastic duct (namely when the amount of water collected in the elastic duct is relatively large, it exerts a sufficient thrust by gravity to open the elastic duct and allow the water outlet);
  • the patent applications DE19737545A1 , FR2857058A1 , FR2862576A1 and DE10200673A1 describe some examples of air-boxes provided with a drainage hole equipped with an elastic duct (namely, equipped with a passive valve which is normally closed and is controlled by the water pressure that builds up).
  • the object of the present invention is to provide a filtering device for the air taken in by an internal combustion engine, such filtering device being free from the aforesaid drawbacks and being at the same time easy and economical to manufacture.
  • number 1 indicates in its entirety a filtering device for an intake system of an internal combustion engine (shown schematically in Figure 4 ) of a vehicle (shown schematically in Figure 4 ); namely, the filtering device 1 filters the air taken in by the internal combustion engine.
  • the filtering device 1 comprises an air-box 2, which has inside it a cavity having (at least) an inlet opening 3 toward the external environment and (at least) an outlet opening 4 toward the intake system of the internal combustion engine. Furthermore, the filtering device 1 comprises (at least) a filter 5 that is housed inside the air-box 2, is arranged between the inlet opening 3 and the outlet opening 4 and divides the cavity in an inlet chamber 6, which is arranged upstream of the filter 5 and communicates with the external environment through the inlet opening 3, and an outlet chamber 7, which is arranged downstream of the filter 5 and communicates with the intake system of the internal combustion engine through the outlet opening 4.
  • the filter 5 has a parallelepiped shape, but according to other and completely equivalent embodiments, the filter 5 may have a different shape (for example a tubular cylindrical or truncated-conical shape).
  • the filtering material of the filter 5 may be made of fabric or non-woven fabric of cotton or other fibres enclosed between two layers of thin metallic net, conferring shape and strength to the filtering material.
  • the air-box 2 is cup-shaped and has a lower wall 8 and an open upper end opposite to the lower wall 8. Furthermore, the air-box 2 is provided with a removable lid 9 (typically screwed to side walls of the air-box 2) that closes the open upper end, thus forming an upper wall of the air-box 2.
  • a removable lid 9 typically screwed to side walls of the air-box 2 that closes the open upper end, thus forming an upper wall of the air-box 2.
  • the inlet opening 3 receives the air from a dynamic air inlet formed through a front or side wall of the vehicle; in this way, when the vehicle is in motion, the air pressure against the front or side wall of the vehicle generates an overpressure inside the cavity of the air-box 2; the higher the vehicle speed, the greater the overpressure.
  • This overpressure inside the cavity of the air-box 2 increases the filling of the cylinders of the engine, and therefore increases the power generated by the engine.
  • the lower wall 8 of the air-box 2 which inferiorly delimits the cavity has (at least) a drainage through-hole 10 for the drainage of any residual water inside the cavity of the air-box 2 (both due to the condensation of the moisture of the air taken in and to the direct entry of raindrops).
  • the lower wall 8 of the air-box 2 has a slope converging toward the drainage hole 10; in other words, the drainage hole is arranged at the lowest point of the whole lower wall 8 of the air-box 2 so that any residual water inside the air-box 2 flows by gravity toward the drainage hole 10.
  • valve 11 which is coupled to the drainage hole 10 and is movable between a closed position (shown in Figure 2 ), where it closes (seals) the drainage hole 10 not to jeopardize the pneumatic sealing of the air-box 2, and an open position (shown in Figure 3 ), where it lets the drainage hole 10 free to allow the drainage of any residual water inside the air-box 2.
  • the valve 11 comprises a shutter 12, which moves to close (seal) the drainage hole 10 ( Figure 2 ) or to let the drainage hole 10 free ( Figure 3 ).
  • the valve 11 comprises a shaft 13, which is rotatably mounted to rotate about the axis of rotation 14 and supports the shutter 12, and an actuator 15, which is mechanically connected to the shaft 13 to rotate the shaft 13 around the axis of rotation 14.
  • a spring 16 is mechanically coupled to the shaft 13 and pushes the shaft 13 toward the closed position (shown in Figure 2 ); in this way, the valve 11 is normally closed (i.e. when the actuator 15 is not activated, the valve is closed by the thrust of the spring 16) and opens only when the actuator 15 is activated to rotate the shaft 13 against the elastic force generated by the spring 16.
  • an electronic control unit 17 which drives (turns on) the actuator 15 to control the opening of the valve 11.
  • the control unit 17 opens the valve 11 at regular intervals and at each opening it keeps the valve 11 open only for a short time lapse (much shorter than the time lapse between a valve opening 11 and the subsequent opening); for example, the control unit 17 opens the valve 11 every 10-20 minutes for a few seconds (enough to guarantee the drainage of any residual water inside the air-box 2). In this way, a regular drainage of any residual water inside the air-box 2 is guaranteed with no substantial disadvantage in the performance of the internal combustion engine.
  • the control unit 17 opens the valve 11 only when the internal combustion engine generates a limited power (namely remarkably lower than the maximum power), not to jeopardize the performance of the internal combustion engine exactly when the maximum performance is required to the internal combustion engine.
  • the control unit 17 opens the valve 11 only when the rotation speed of the internal combustion engine is lower than a first threshold and/or when the load of the internal combustion engine is lower than a second threshold.
  • the control unit 17 opens the valve 11 only when a rain sensor 18 of the vehicle detects the presence of rain (the rain sensor 18 is usually an optical sensor and is coupled to the vehicle windshield). In particular, when the rain sensor 18 detects the presence of rain, the control unit 17 may keep the valve 11 always open or may increase the opening frequency and/or duration of the valve 11. For example, in the absence of rain, the control unit 17 opens the valve 11 for a few seconds every 20-30 minutes, while in the presence of rain the control unit 17 opens the valve 11 for several seconds every 3-8 minutes. If the vehicle is not equipped with a rain sensor 18, the control device 19 of the windshield wiper may be used instead of the rain sensor 18 (i.e. when the windshield wiper is switched on, then it is inferred the presence of rain).
  • the control unit 17 determines the opening of the valve 11 also depending on the position of a vehicle " knob ", namely a selector set by the driver according to the desired driving mode; in particular, the control unit 17 increases the opening frequency and/or duration of the valve 11 when the vehicle " knob " requires a "wet driving mode".
  • control unit 17 opens the valve 11 for a few moments at each shutdown and/or ignition of the internal combustion engine; in other words, as a precaution, each time the internal combustion engine is switched off and/or switched on, the control unit 17 shortly opens the valve 11 to allow the drainage of any residual water which has not been previously evacuated.
  • the shutter 12 may have a circular or a semicircular shape; alternatively, it may be provided with two adjacent shutters, having e.g. a semicircular shape. According to other perfectly equivalent embodiments, the shutter 12 may have a linear movement instead of a rotary movement.
  • the aforesaid filtering device 1 has numerous advantages. First, the aforesaid filtering device 1 allows an effective and efficient drainage of any residual water inside the air-box 2, at the same time not jeopardizing the performance of the internal combustion engine. The drainage of any residual water inside the air-box 2 is particularly effective, since the drainage hole 11 can be quite large (and therefore can rapidly drain any residual water and is free from clogging) as it is normally closed by the valve 11.
  • the aforesaid filtering device 1 is easy and economical to produce, since the valve 11 and the actuator 15 are of a standard type and are commercially available at very low prices, and since the handling of the valve 11 is trivial (i.e. it has only two end positions: fully closed valve 11 and fully open valve 11).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Compressor (AREA)
EP16168525.0A 2015-05-05 2016-05-05 Dispositif de filtration pour l'air aspiré par un moteur à combustion interne à drainage d'eau résiduelle Active EP3091217B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO2015A000231A ITBO20150231A1 (it) 2015-05-05 2015-05-05 Dispositivo filtrante per l'aria aspirata da un motore a combustione interna con scarico dell'acqua residua

Publications (2)

Publication Number Publication Date
EP3091217A1 true EP3091217A1 (fr) 2016-11-09
EP3091217B1 EP3091217B1 (fr) 2018-04-18

Family

ID=53836631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16168525.0A Active EP3091217B1 (fr) 2015-05-05 2016-05-05 Dispositif de filtration pour l'air aspiré par un moteur à combustion interne à drainage d'eau résiduelle

Country Status (2)

Country Link
EP (1) EP3091217B1 (fr)
IT (1) ITBO20150231A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3081152A1 (fr) * 2018-05-17 2019-11-22 Renault S.A.S. Recipient equipe d'une valve d'etancheite a air

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737545A1 (de) 1997-08-28 1999-03-04 Bosch Gmbh Robert Ansaugeinrichtung, insbesondere für Brennkraftmaschinen in Kraftfahrzeugen
US20020083916A1 (en) * 2000-10-26 2002-07-04 Hermann Maurer Controllable air intake system for an internal combustion engine and control process therefor
DE10200673A1 (de) 2002-01-10 2003-07-31 Siemens Ag Kraftfahrzeug-Luftfilter
FR2857058A1 (fr) 2003-07-03 2005-01-07 Coutier Moulage Gen Ind Dispositif de decantation d'eau pour ligne d'admission d'air d'un moteur a combustion interne
FR2862576A1 (fr) 2003-11-22 2005-05-27 Mann & Hummel Gmbh Systeme d'admission de moteur a combustion interne
CN201085968Y (zh) * 2007-09-07 2008-07-16 山东明水汽车配件厂 空气滤清器
DE102010021862A1 (de) * 2010-05-28 2011-12-01 Mann + Hummel Gmbh Luftfilter
DE102011086705A1 (de) * 2011-11-21 2013-05-23 Robert Bosch Gmbh Verfahren zur Beurteilung einer Wasserbeladung eines Luftfilters

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737545A1 (de) 1997-08-28 1999-03-04 Bosch Gmbh Robert Ansaugeinrichtung, insbesondere für Brennkraftmaschinen in Kraftfahrzeugen
US20020083916A1 (en) * 2000-10-26 2002-07-04 Hermann Maurer Controllable air intake system for an internal combustion engine and control process therefor
DE10200673A1 (de) 2002-01-10 2003-07-31 Siemens Ag Kraftfahrzeug-Luftfilter
FR2857058A1 (fr) 2003-07-03 2005-01-07 Coutier Moulage Gen Ind Dispositif de decantation d'eau pour ligne d'admission d'air d'un moteur a combustion interne
FR2862576A1 (fr) 2003-11-22 2005-05-27 Mann & Hummel Gmbh Systeme d'admission de moteur a combustion interne
CN201085968Y (zh) * 2007-09-07 2008-07-16 山东明水汽车配件厂 空气滤清器
DE102010021862A1 (de) * 2010-05-28 2011-12-01 Mann + Hummel Gmbh Luftfilter
DE102011086705A1 (de) * 2011-11-21 2013-05-23 Robert Bosch Gmbh Verfahren zur Beurteilung einer Wasserbeladung eines Luftfilters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3081152A1 (fr) * 2018-05-17 2019-11-22 Renault S.A.S. Recipient equipe d'une valve d'etancheite a air

Also Published As

Publication number Publication date
EP3091217B1 (fr) 2018-04-18
ITBO20150231A1 (it) 2016-11-05

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