EP1939432A1 - Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor - Google Patents

Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor Download PDF

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Publication number
EP1939432A1
EP1939432A1 EP06425879A EP06425879A EP1939432A1 EP 1939432 A1 EP1939432 A1 EP 1939432A1 EP 06425879 A EP06425879 A EP 06425879A EP 06425879 A EP06425879 A EP 06425879A EP 1939432 A1 EP1939432 A1 EP 1939432A1
Authority
EP
European Patent Office
Prior art keywords
shutter
servo controlled
controlled valve
valve
air passage
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.)
Withdrawn
Application number
EP06425879A
Other languages
English (en)
French (fr)
Inventor
Alessandro Brazzi
Antonio Giaquinto
Nazario Bellato
Paolo Cominetti
Giorgio Ferretti
Stefano Musolesi
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.)
Marelli Europe SpA
Original Assignee
Magneti Marelli Powertrain SpA
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 Magneti Marelli Powertrain SpA filed Critical Magneti Marelli Powertrain SpA
Priority to EP06425879A priority Critical patent/EP1939432A1/de
Publication of EP1939432A1 publication Critical patent/EP1939432A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
    • F02D9/16—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit the members being rotatable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/106—Detection of demand or actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/06—Small engines with electronic control, e.g. for hand held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits

Definitions

  • the present invention relates to a servo controlled valve for adjusting the intake air flow rate in an internal combustion engine.
  • a servo controlled butterfly valve which adjusts the intake air flow rate which is fed to the cylinders, is normally contemplated.
  • a servo controlled butterfly valve presents a valve body accommodating a valve seat engaged by a butterfly valve plate, which is keyed on a rotational shaft to turn from an opening position to a closing position by effect of the action of an electrical motor coupled to the shaft itself by means of a geared drive.
  • a position sensor which is adapted to detect the angular position of the shaft (i.e. of the butterfly valve plate), is coupled to one end of the shaft to allow a control unit to feedback control the electrical motor.
  • the currently marketed servo controlled butterfly valves are costly when they need to be mounted on small displacement engines (typically one-cylinder or two-cylinder motorcycles engines), i.e. when they need to adjust the flow rate of a small section intake channel.
  • a servo controlled valve for adjusting the intake air flow rate in an internal combustion engine as claimed by the accompanying claims is provided.
  • numeral 1 indicates as a whole an electronically controlled servo controlled valve for adjusting the intake air flow rate in an internal combustion engine (not shown).
  • Servo controlled valve 1 comprises a valve body 2, in which an air passage channel 3 is defined; within valve body 2 and along air passage channel 3 it is obtained a valve seat 4 (shown in figure 2 ), which has a tubular cylindrical shape and is engaged by a cylindrical shutter 5 (shown in figure 2 ) mobile between an opening position and a closing position of air passage channel 3.
  • Shutter 5 is rotationally mounted within valve seat 4 to turn about an axis of rotation 6 perpendicular to air passage channel 3 between the opening position and the closing position of air passage channel 3 under the bias of an electrical motor 7 carried by valve body 2.
  • shutter 5 has a cylindrical shape, a longitudinal axis of symmetry coaxial to axis of rotation 6, and presents an internal pipe 8 which is through and perpendicular to axis of rotation 6 so as to be aligned with air passage channel 3 in the opening position and to be perpendicular to air passage channel 3 in the closing position.
  • internal pipe 8 of shutter 5 has a rectangular section having preferably rounded vertexes; consequently, also air passage channel 3 presents a rectangular section having preferably rounded vertexes.
  • This embodiment in which internal pipe 8 of shutter 5 has a rectangular section allows internal pipe 8 to be optimised, i.e. allows to obtain a high air introduction area of internal pipe 8 while maintaining a reduced size of valve seat 4.
  • internal pipe 8 of shutter 5 has a circular section; consequently, also air passage channel 3 presents a circular section.
  • shutter 5 presents an internally full cylindrical tubular shape.
  • shutter 5 presents an internally hollow cylindrical shape; consequently, internal pipe 8 is defined by a pair of through openings which are obtained through the side surface of shutter 5 and are reciprocally aligned along a direction perpendicular to axis of rotation 6.
  • shutter 5 consists of a single monolithic body formed by moulded plastic material and is hinged to valve body 2 by means of a pair of bushings 9 (only one of which is shown in figures 2 and 3 ), each of which accommodates therein a corresponding end of shutter 5 itself and is formed by steel.
  • the low friction coefficient existing between each steel bushing 9 and the corresponding end of shutter 5 formed by plastic material allows a smooth, easy rotation of shutter 5 itself about axis of rotation 6.
  • electrical motor 7 is arranged by the side of shutter 5 and is coupled to shutter 5 itself by means of a geared drive 10 having a demultiplying effect (i.e. reducing the angular speed and increasing the motive torque).
  • geared drive 10 comprises a gear 11, which is integral with the shaft of electrical motor 7 and meshes with an external ring gear of an idle intermediate gear 12; an internal ring gear of idle gear 12 meshes with a gear 13 integral with shutter 5.
  • gear drive 10 does not include intermediate idle gear 12, and consequently gear 11 integral with the shaft of electrical motor 7 directly meshes with gear 13 integral with shutter 5.
  • electrical motor 7 is coaxial to shutter 5 and presents a shaft axis directly keyed onto shutter 5 itself.
  • Such embodiment allows to simplify servo controlled valve 1 and to reduce the dimensions of servo controlled valve 1 itself by effect of the lack of geared drive 10; on the other hand, such embodiment requires the use of an electrical motor 7 capable of developing a much higher torque due to the lack of the demultiplying effect generated by geared drive 10.
  • shutter 5 is coupled to an inductive position sensor 14 of the "contactless” type to detect the angular position of shutter 5 itself so as to allow a feedback control of the position of shutter 5 itself.
  • Position sensor 14 is of the type described in patent application US6236199B1 and comprises a rotor 15 (shown in figures 6 and 7 ), which is integral with shutter 5, and a stator 16 (shown in figure 4 ), which is arranged in use facing rotor 15.
  • Rotor 15 is defined by a flat metallic loop, which is closed in short circuit, presents a series of lobes, and is incorporated by co-moulding in shutter 5.
  • an accommodation chamber 17 (shown in figures 3 and 6 ), which is closed by a removable lid 18, is obtained in valve body 2.
  • Rotor 15 of position sensor 14 is integral with shutter 5 and is located in accommodation chamber 17, while stator 16 of position sensor 14 is supported by lid 18; in this manner, position sensor 14 is actually formed when lid 18 is fastened to valve body 2 to close accommodation chamber 17.
  • accommodation chamber 17 also accommodates electrical motor 7 and geared drive 10; specifically, electrical motor 7 presents a cylindrical shape and is arranged in a tubular accommodation which extends within accommodation chamber 17 and is arranged by the side of valve seat 4.
  • electrical motor 7 and geared drive 10 are arranged outside accommodation chamber 17.
  • a pair of lip seals 19 (only one of which is shown in figure 3 ), which are arranged about opposite ends of shutter 5 to seal valve seat 4, are contemplated.
  • the servo controlled valve comprises a male electrical connector 20 (shown in figures 1 , 3 and 4 ), which is carried by lid 18, is electrically connected to electrical motor 7 by means of a pair of pins 21 (shown in figure 4 ), and is electrically connected to stator 16 of position sensor 14.
  • electrical connector 10 is arranged laterally and externally to accommodation chamber 17; in the embodiment shown in figures 5-7 , electrical connector 20 is arranged through accommodation chamber 17, which presents a through hole 22 (shown in figures 5 and 6 ) through which electrical connector 20 is arranged.
  • servo controlled valve 1 preferably comprises a return spring 23 (generally a torsional spring), which presents an end 24 integral with shutter 5 and an opposite end 25 integral with valve body 2; valve body 2 preferably presents a removable lid 26 at end 25 of return spring 23.
  • return spring 23 generally a torsional spring
  • Return spring 23 tends to turn shutter 5 in a direction opposite to the opening direction (i.e. in the direction which takes shutter 5 from the closing position to the maximum opening position) so that shutter 5 is taken to a negative limp-home position (i.e. a partial opening in direction contrary to the normal opening positions).
  • shutter 5 in absence of the action of electrical motor 7, shutter 5 is arranged in the limp-home position and electrical motor 7 must be activated to generate a motive torque which overcomes the bias of return spring 23 so as to move shutter 5 to the closing position or to the maximum opening position.
  • both the limp-home position and the all opening positions are defined by corresponding stop bodies (not shown), which may be provided with corresponding fastenable/releasable dowels for fine adjustment of the positions.
  • Figure 9 schematically shows shutter 5 in the negative limp-home position ( figure 9-A ), shutter 5 in the closing position ( figure 9-B ), shutter 5 in two partially opening positions ( figures 9-C and 9-D ), and shutter 5 in the maximum opening position ( figure 9-E ).
  • servo controlled valve 1 is simple and cost-effective to manufacture when it is dimensioned to adjust the flow rate of a small section intake channel; i.e. servo controlled valve 1 above-described is particularly adapted to be mounted on small displacement internal combustion engines (typically motorcycles one-cylinder or two-cylinder engines).
  • shutter 5 consists of a single monolithic body formed by moulded plastic material.
  • the above-described servo controlled valve 1 is specifically robust and reliable.
  • the above-described servo controlled valve 1 determines along the air passage channel 3 lower load losses with respect to a similar traditional servo controlled butterfly valve because, while in the opening position, internal pipe 8 is not crossed by any shaft as instead occurs in a similar traditional butterfly valve.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
EP06425879A 2006-12-29 2006-12-29 Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor Withdrawn EP1939432A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06425879A EP1939432A1 (de) 2006-12-29 2006-12-29 Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06425879A EP1939432A1 (de) 2006-12-29 2006-12-29 Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor

Publications (1)

Publication Number Publication Date
EP1939432A1 true EP1939432A1 (de) 2008-07-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425879A Withdrawn EP1939432A1 (de) 2006-12-29 2006-12-29 Servogesteuertes Ventil mit zylindrischem Verschluss zum Regeln des Ansaugluftdurchsatzes bei einem Verbrennungsmotor

Country Status (1)

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EP (1) EP1939432A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0300479A2 (de) * 1987-07-22 1989-01-25 Mitsubishi Denki Kabushiki Kaisha Steuervorrichtung für eine Drosselklappe
DE19830575A1 (de) * 1998-07-08 2000-01-13 Nonox B V Ladungssteuervorrichtung für eine sowie Verfahren zum Steuern des Betriebs einer Hubkolbenbrennkraftmaschine
EP1081356A2 (de) * 1999-09-03 2001-03-07 Honda Giken Kogyo Kabushiki Kaisha Einlasssystem für Brennkraftmaschine
US20030019521A1 (en) * 2001-05-11 2003-01-30 Robert Bosch Gmbh Throttle assembly for a flowing medium
EP1403483A1 (de) * 2002-09-30 2004-03-31 Mazda Motor Corporation Lufteinlasssystem für eine Mehrzylinderbrennkraftmaschine, damit ausgerüstete Brennkraftmaschine und Drehschieber dafür
EP1559885A2 (de) * 2000-03-30 2005-08-03 Honda Giken Kogyo Kabushiki Kaisha Drosselklappe für eine Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0300479A2 (de) * 1987-07-22 1989-01-25 Mitsubishi Denki Kabushiki Kaisha Steuervorrichtung für eine Drosselklappe
DE19830575A1 (de) * 1998-07-08 2000-01-13 Nonox B V Ladungssteuervorrichtung für eine sowie Verfahren zum Steuern des Betriebs einer Hubkolbenbrennkraftmaschine
EP1081356A2 (de) * 1999-09-03 2001-03-07 Honda Giken Kogyo Kabushiki Kaisha Einlasssystem für Brennkraftmaschine
EP1559885A2 (de) * 2000-03-30 2005-08-03 Honda Giken Kogyo Kabushiki Kaisha Drosselklappe für eine Brennkraftmaschine
US20030019521A1 (en) * 2001-05-11 2003-01-30 Robert Bosch Gmbh Throttle assembly for a flowing medium
EP1403483A1 (de) * 2002-09-30 2004-03-31 Mazda Motor Corporation Lufteinlasssystem für eine Mehrzylinderbrennkraftmaschine, damit ausgerüstete Brennkraftmaschine und Drehschieber dafür

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