Classifications

• • 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
  • F02D9/14—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 slidable transversely of conduit
• • 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

Definitions

• Device for controlling the opening and closing of at least one air duct of a cylinder head of an internal combustion engine.
• the present invention relates to a device for controlling the opening and closing of at least one air duct of a cylinder head of an internal combustion engine.
• the devices for controlling the opening and closing of the air intake ducts of internal combustion engines consist of an axis arranged in the cylinder head which passes on either side of the intake ducts and which is provided at the right of each conduit with a milling on which is fixed a butterfly, which has the general shape of a disc, by means of two screws.
• Such devices require numerous machining operations with great precision in the cylinder head, as well as mounting of the butterflies in the particularly difficult ducts which can for example entail risks of loss of screws in the intake ducts, which leads to assembly times. important and expensive.
• the object of the present invention is to provide a device for controlling the opening and closing of at least one intake duct which makes it possible to solve the drawbacks mentioned above.
• the present invention relates to a device for controlling the opening and closing of at least one air intake duct of a cylinder head of an internal combustion engine, characterized in that it comprises a cylindrical plug arranged transversely to the air duct in a bore made in the cylinder head and able to move between a first closed position of the duct and a second open position of said duct under the action of a means of actuation.
• control device may also include one or more of the following characteristics: - the plug is able to move in translation in the bore,
• the plug is able to move in rotation in the bore
• the cylindrical cylindrical bushel comprises successively over its length for each conduit on the one hand a first portion forming a bearing which has in cross section the general shape of a cross and on the other hand a second portion which consists of a partition vertical of length substantially equivalent to the diameter of a conduit, and in that each of the portions is delimited by two discs perpendicular to the longitudinal axis of the plug,
• the plug comprises successively over its length for each conduit on the one hand a first portion forming a bearing which has in cross section the general shape of a cross and on the other hand a second portion which consists of a cylindrical part provided with an orifice whose longitudinal axis of symmetry is perpendicular to the longitudinal axis of the plug and whose diameter is equivalent to the diameter of the corresponding air intake duct,
• the bushel comprises, on one of the portions forming a bearing, a means for coding the bushel in the bore making it possible to ensure the adequate position of said second portion in line with the air intake ducts,
• the coding means consists of a longitudinal groove which is capable of receiving the end of a guide screw which is fixed to the cylinder head,
• the actuating means consists of a vacuum chamber formed between one end of the plug and a closure plate which is provided with an orifice forming a vacuum system controllable by a computer according to the engine speeds
• the actuating means consists of a rod fixed to one of the ends of the plug and which is connected to a vacuum capsule actuated by a computer according to the engine speeds
• the plug consists of a one-piece assembly produced by molding a plastic material which is capable of withstanding temperatures less than or equal to 1 00 degrees celsius such as for example polyamide
• FIG. 1 is a partial perspective view of a cylinder head, of an internal combustion engine, provided with the device for controlling the opening and closing of the air intake ducts according to the present invention
• FIG. 2 is a sectional view along the line I-I I of the cylinder head of FIG. 1 equipped with a means for actuating the device in translation,
• FIG. 3 is a perspective view of the device according to FIG. 2 without the cylinder head
• FIG. 4 is a view similar to FIG. 2, fitted in a variant with a means of actuation in translation,
• FIG. 5 is a perspective view of the device for controlling the opening and closing and its means of actuation in rotation, without the cylinder head,
• FIGS. 6 and 7 are partial perspective views of a cylinder head and of the device according to lines VI-VI of FIG. 2, respectively in the open position and in the closed TM position of the air intake ducts
• FIG. 8 is a front view in section of an air intake duct provided with a variant embodiment of the control device, and
• FIG. 9 is a perspective view of the control device according to FIG. 8
• FIG. 1 shows a cylinder head 1 of an internal combustion engine which is conventionally provided with air intake ducts 2, for example four, arranged on one of the lateral faces of the cylinder head 1 and each having the general shape of an IO of an elbow, one of the orifices of which opens out at the level of the horizontal joint plane P on which a camshaft casing rests, not shown
• the cylinder head 1 is advantageously provided with a device for controlling the opening and closing of the air intake ducts i which, according to the present invention, consists of a cylindrical bushel 3 arranged transversely to the air ducts 2 in a bore 4, as visible in FIG. 2, produced in the cylinder head 1 and able to move between a first position
• the bore 4 consists of a blind hole which is made so as to cross transversely on either side the intake ducts 2, as visible in FIG. 2
• the plug 3 consists of a one-piece assembly produced by molding a plastic material which is capable of withstanding temperatures less than or equal to 1 00 degrees celsius such as for example polyamide
• This plug 3 successively comprises over its length) for each conduit 2 on the one hand a first portion 5 forming a bearing which has in cross section the general shape of a cross and on the other hand a second portion 6 which consists of a vertical partition 7 of length substantially equivalent to the diameter of a conduit 2
• Each portions 5, 6 being delimited by two discs perpendicular to the longitudinal axis M of the plug 3
• This groove 9 is capable of receiving the end of a guide screw 10 which is fixed on the cylinder head 1, as visible in FIG. 2
• the cylindrical plug 3 is provided at one ⁇ of its ends 11 with a circular groove 12 in which is mounted an O-ring 13 thus forming a piston
• a closure plate 14 is fixed by means of screws V to the cylinder head 1 so as to close the blind hole 4 thus ensuring the tightness of the control device
• This plate 14 is provided with an orifice 1 5 of small diameter allowing the intake of vacuum in a chamber 16 formed between the plate 14 and the end of the plug 3 forming a piston
• the control of air intake in the intake o conduits 2 is ensured by the 3 cylindrical cylindrical plug which is displaceable in translation between a first position P 1, for example of opening, as shown in FIG. 6, or the vertical partition 7 is arranged in line with the conduits 2 air intake and a second shutter position P2, as shown in Figures 7 and 2, or the first portion 5 of the plug 3 is arranged in line with the air intake ducts 2
• This plug 3 is actuated by a vacuum / overpressure system, depending on the engine speed, produced in the chamber 16 formed between the end 11 of said plug 3 and the closure plate 14 which is controlled for example by a computer, not represented
• FIG. 4 shows a variant embodiment of the actuation means of the plug 3, in which the vacuum chamber 16 is replaced by a vacuum capsule 17 mounted at the end of the bore 4 allowing the displacement of the bushel 3 in translation, along arrow F, according to the engine speeds controlled by a computer, 2o not shown
• FIG. 5 Another alternative embodiment of the actuating means is shown in Figure 5, in which the translational movement is replaced by a rotational movement, arrow R
• actuation means are for example 2 constituted by a rod 1 8 fixed on one of the ends 11 of the plug 3 which is connected to a vacuum capsule 19 which is actuated as a function of the engine speeds controlled by a computer
• This plug 3 comprises successively over its length for each conduit 2 on the one hand a first portion 20 forming a bearing which has in cross section the general shape of a cross and on the other hand a second portion 21 which consists of a bar cylindrical cylinder provided with an orifice 22 whose longitudinal axis of symmetry N is perpendicular to the longitudinal axis M of the plug 3 and whose diameter is equivalent to the diameter of the corresponding air intake duct, as visible in the figure 8
• plug 3 can be moved in translation or in rotation according to the actuation means described above or equivalent means
• control device of the present invention advantageously allows easier mounting in the cylinder head and is inexpensive

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)
• Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9522330

Family Applications (1)

Country Status (8)

Families Citing this family (7)

Family Cites Families (13)

• 1998
  • 1998-01-29 FR FR9800992A patent/FR2774125B1/fr not_active Expired - Fee Related
• 1999
  • 1999-01-28 ES ES99901637T patent/ES2189381T3/es not_active Expired - Lifetime
  • 1999-01-28 EP EP99901637A patent/EP0970302B1/de not_active Expired - Lifetime
  • 1999-01-28 DE DE69904400T patent/DE69904400T2/de not_active Expired - Lifetime
  • 1999-01-28 US US09/381,310 patent/US6332449B1/en not_active Expired - Fee Related
  • 1999-01-28 BR BR9904803-5A patent/BR9904803A/pt not_active IP Right Cessation
  • 1999-01-28 JP JP53898699A patent/JP2001518166A/ja not_active Ceased
  • 1999-01-28 WO PCT/FR1999/000160 patent/WO1999039091A1/fr not_active Ceased

Non-Patent Citations (1)

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