EP1228299A1 - Corps papillon possedant un papillon muni d'un lamage - Google Patents
Corps papillon possedant un papillon muni d'un lamageInfo
- Publication number
- EP1228299A1 EP1228299A1 EP00974657A EP00974657A EP1228299A1 EP 1228299 A1 EP1228299 A1 EP 1228299A1 EP 00974657 A EP00974657 A EP 00974657A EP 00974657 A EP00974657 A EP 00974657A EP 1228299 A1 EP1228299 A1 EP 1228299A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- butterfly
- face
- relief
- downstream
- faces
- 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
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 241000255777 Lepidoptera Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
-
- 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
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1005—Details of the flap
- F02D9/101—Special flap shapes, ribs, bores or the like
- F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
-
- 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
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
Definitions
- the present invention relates to a throttle body for a fuel injection device for an internal combustion engine. More particularly, the invention relates to a butterfly body of the type comprising:
- a disc-shaped butterfly substantially circular or slightly elliptical, mounted on a median axis of rotation, transverse to the duct, dividing this duct into an upstream part and a downstream part, and movable between a minimum open position and a position d maximum opening for which the throttle plane is oriented substantially parallel to the axis of the intake duct, the portion of the throttle which turns towards the upstream part of the duct, respectively towards the downstream part, from the open position minimum, being called high wing, respectively low wing, and having the shape of a flat half-disc having a thin section compared to its surface, the high wing thus presenting an upstream face and a downstream face, the duct being intended to be crossed by a stream of gas whose speed is maximum at a portion of the upper wing of the butterfly.
- the gas deflected by the butterfly has a speed gradient which passes through a maximum over a certain portion of the upper wing of the butterfly. This can cause a whistling sound for certain opening angles of the throttle valve when the gas flow is suddenly diverted downstream of the throttle valve, for example by a wall of the intake manifold positioned in the immediate vicinity of the outlet of the housing, and this, whatever the shapes of known butterflies.
- the present invention aims to provide a throttle body in which this kind of whistling is eliminated regardless of the opening angle of the throttle.
- a butterfly body of the type in question is essentially characterized in that a hollow relief is formed in the downstream face of the portion of the upper wing of the butterfly which undergoes the maximum speed of the gas, the relief in relief opening radially into the peripheral lateral face of the butterfly and being delimited by surfaces whose intersections with the downstream face are sharp edges.
- the hollow relief causes a dissipation of part of the energy of the gas flow flowing on the butterfly so that the energy available to produce an audible noise is greatly reduced and by therefore the hiss is suppressed regardless of the opening angle of this butterfly.
- the recessed relief is delimited by an upper face from which extend, to the downstream face, two substantially radial faces substantially opposite, and a transverse face connecting the substantially radial faces one to the other, and such that the intersections of the substantially radial and transverse faces with the downstream face are sharp edges,
- the upper, substantially radial, and transverse faces are substantially flat
- the intersections of the transverse face with the substantially radial faces and the upper face are sharp edges, the substantially radial faces are connected to the upper face in a rounded shape,
- the substantially radial faces diverge from one another from the transverse face and towards the peripheral lateral face of the butterfly
- the upper face of the hollow relief is substantially parallel to the downstream and upstream faces, the intersections of which with the peripheral lateral face of the butterfly are sharp edges,
- the remaining thickness of the butterfly is less than approximately 1.5 mm
- the width of the relief in relief, considered in a substantially circumferential direction is between 10% and 25% of the diameter of the butterfly
- the length of the relief in relief, considered in a substantially radial direction is greater than approximately 50% of the width of said relief
- - The length of the relief in relief is less than about 90% of the width of said relief.
- FIG. 1 is a view in longitudinal section of a butterfly body having a butterfly according to the present invention
- FIG. 2 is a bottom view of the butterfly in FIG. 1, and
- FIG. 3 is an enlarged partial schematic view, along arrow III of Figure 2, of the butterfly in side elevation and facing the opening of the recessed relief in the peripheral lateral face of the butterfly.
- FIG. 1 represents a throttle body 1 which comprises a housing 2 in which is formed an intake duct 3, of longitudinal axis X-X.
- the housing 2 is for example manufactured by molding in a synthetic material such as a thermoplastic material and obtained in its final form without additional machining or deburring. This case can also be made of aluminum.
- a pivot 5, of axis YY perpendicular to the longitudinal axis XX of the conduit 3 and intersecting this axis XX, is rotatably mounted and constitutes a median axis of rotation for a butterfly 6 in the form of a flat disc, of section (perpendicular to the axis of the disc) approximately circular or slightly elliptical, with an upper face and a lower face which are substantially planar and substantially parallel to each other, and whose intersections with a peripheral lateral face connecting them to each other are sharp edges.
- the median axis of rotation 5 is rotatably mounted, for example at mid-height of the conduit 3 and divides this conduit into two sections 8 and 9.
- the butterfly 6 shown in Figures 1 to 3 is advantageously made of a synthetic material such as a thermoplastic material. It consists of a flat disc with a substantially circular or slightly planar shape elliptical, of generally constant thickness so that it has a section 11 of substantially constant height over the entire periphery of the disc. Due to technological constraints and the pressure exerted by the gas on the butterfly 6, the thickness thereof is for example substantially equal to at least 3 mm.
- the butterfly 6 pivots about its median axis of rotation 5 in the direction of the double arrow R represented in FIG. 1, between a minimum open position and a maximum open position.
- the butterfly 6 is shown in the intermediate open position.
- This butterfly can thus be considered as consisting of two half-discs 12 and 13, the half-disc 12 rotating towards the upstream part 8 of the duct 3 being called the upper wing and the half-disc 13 rotating towards the downstream part 9 of this duct being called low wing.
- the upper wing 12 has a so-called upstream face 15 facing the incoming flow, and an opposite face 16 said downstream which is facing the outgoing flow.
- the distribution of the gas speed gradient in the duct 3 implies that a portion 20 of the trailing edge of the high wing 12 undergoes a maximum gas speed. In this portion, the energy of the flow is therefore very important.
- a single hollow relief 21 is formed in the downstream face 16 of the high wing 12. This relief 21 opens into the downstream face 16 and into the peripheral lateral face of the butterfly 6 , extending over part of the thickness of this butterfly.
- the recessed relief 21 is in the form of a counterbore substantially of rectangular shape and extending substantially radially. Its axis of symmetry ZZ coincides for example with the diameter of the butterfly and is perpendicular to the axis YY. In fact, when no obstacle is located upstream of the butterfly 6 in the duct 3, the plane of maximum gas speeds passes through the diameter of the butterfly 6 which is perpendicular to the axis of rotation Y-Y. However, in if the duct 3 has an obstacle upstream of this butterfly 6, the plane of maximum speeds passes through a different place so that the hollow relief 21 is then located in a different region from the downstream face 16 of the upper wing 12 of the butterfly 6. An essential characteristic is that this relief 21 is always situated at the level of the maximum speed plane.
- the depth of the recessed relief 21 is such that the remaining thickness e of the butterfly 6 in the region 20 is less than 1.5 mm. Furthermore, the hollow relief 21 is delimited by an upper face
- intersections of the so-called “radial” faces 25, 26 and of the transverse face 27 with the downstream face 16 are all sharp edges 25a, 26a and 27a.
- the intersections of the transverse face 27 with the so-called radial faces 25, 26 and with the upper face 24 may be sharp edges 27c, 27d and 27b.
- the width I of the hollow relief 21, considered in a substantially circumferential direction, that is to say its dimension along the transverse face 27, is substantially between 10% and 25% of the value of the diameter of the butterfly 6.
- the width I is approximately equal to 6 mm and the length L is approximately equal to 5 mm while the depth of this relief 21 is substantially constant and approximately equal to 1 mm.
- the portion 20 of the upper wing 12 is of greatly reduced thickness compared to the thickness of the rest of the butterfly 6, and is in the present case of the order of two thirds to half the thickness of the rest of the butterfly 6.
- the presence of the recessed relief 21 as defined above causes a decrease in the energy of the gas flow flowing on the butterfly 6 so that any hissing, which would typically occur for an angle of opening ⁇ of the butterfly 6 between 13 and 21 °, is deleted.
- the faces 25 and 26 may be substantially parallel to each other, or even divergent, to a different extent from the divergence resulting from strictly radial faces, from the transverse face 27 and towards the periphery of the butterfly .
- the so-called radial faces 25 and 26 are connected to the upper face 24 of the relief 21 along rounded edges. This further promotes suppression of the hiss.
- the butterfly 6 is located at a distance equal to at least its diameter, and preferably 1.5 times. its diameter, of these obstacles.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Bathtub Accessories (AREA)
- Fuel-Injection Apparatus (AREA)
- Complex Calculations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9914128A FR2800798B1 (fr) | 1999-11-10 | 1999-11-10 | Corps papillon possedant un papillon muni d'un lamage |
| FR9914128 | 1999-11-10 | ||
| PCT/FR2000/003079 WO2001034958A1 (fr) | 1999-11-10 | 2000-11-06 | Corps papillon possedant un papillon muni d'un lamage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1228299A1 true EP1228299A1 (fr) | 2002-08-07 |
| EP1228299B1 EP1228299B1 (fr) | 2005-04-06 |
Family
ID=9551961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00974657A Expired - Lifetime EP1228299B1 (fr) | 1999-11-10 | 2000-11-06 | Corps papillon possedant un papillon muni d'un lamage |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6705283B1 (fr) |
| EP (1) | EP1228299B1 (fr) |
| AT (1) | ATE292750T1 (fr) |
| BR (1) | BR0015434B1 (fr) |
| DE (1) | DE60019323T2 (fr) |
| ES (1) | ES2240195T3 (fr) |
| FR (1) | FR2800798B1 (fr) |
| PL (1) | PL199337B1 (fr) |
| WO (1) | WO2001034958A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018132033A (ja) * | 2017-02-17 | 2018-08-23 | 株式会社ニッキ | 2気筒汎用エンジンの燃料供給装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1344121A (fr) * | 1963-01-18 | 1963-11-22 | Lockheed Aircraft Corp | Dispositif de suppression de bruit pour une soupape pour fluides |
| US3298677A (en) | 1964-04-20 | 1967-01-17 | Champion Spark Plug Co | Throttle valve for internal combustion engines |
| EP0076612A1 (fr) * | 1981-09-29 | 1983-04-13 | Merle Robert Showalter | Obturateur d'étranglement |
| JPS59160048A (ja) * | 1983-03-04 | 1984-09-10 | Toyota Motor Corp | 内燃機関の絞り弁機構 |
| JPH10103087A (ja) * | 1996-10-01 | 1998-04-21 | Mitsubishi Electric Corp | 制御弁装置 |
| US5881995A (en) * | 1997-12-15 | 1999-03-16 | Pratt & Whitney Canada Inc. | Noise attenuating device for butterfly valves |
| JPH11294199A (ja) * | 1998-04-06 | 1999-10-26 | Hitachi Ltd | 吸入空気流量制御弁 |
-
1999
- 1999-11-10 FR FR9914128A patent/FR2800798B1/fr not_active Expired - Fee Related
-
2000
- 2000-11-06 DE DE60019323T patent/DE60019323T2/de not_active Expired - Lifetime
- 2000-11-06 EP EP00974657A patent/EP1228299B1/fr not_active Expired - Lifetime
- 2000-11-06 WO PCT/FR2000/003079 patent/WO2001034958A1/fr not_active Ceased
- 2000-11-06 BR BRPI0015434-2A patent/BR0015434B1/pt not_active IP Right Cessation
- 2000-11-06 PL PL354535A patent/PL199337B1/pl not_active IP Right Cessation
- 2000-11-06 ES ES00974657T patent/ES2240195T3/es not_active Expired - Lifetime
- 2000-11-06 US US10/110,551 patent/US6705283B1/en not_active Expired - Fee Related
- 2000-11-06 AT AT00974657T patent/ATE292750T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0134958A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2800798A1 (fr) | 2001-05-11 |
| WO2001034958A1 (fr) | 2001-05-17 |
| FR2800798B1 (fr) | 2002-11-15 |
| EP1228299B1 (fr) | 2005-04-06 |
| PL354535A1 (en) | 2004-01-26 |
| DE60019323D1 (de) | 2005-05-12 |
| ATE292750T1 (de) | 2005-04-15 |
| DE60019323T2 (de) | 2006-03-09 |
| BR0015434A (pt) | 2002-07-02 |
| US6705283B1 (en) | 2004-03-16 |
| PL199337B1 (pl) | 2008-09-30 |
| BR0015434B1 (pt) | 2010-08-24 |
| ES2240195T3 (es) | 2005-10-16 |
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