EP0831215A1 - Throttle valve control device - Google Patents
Throttle valve control device Download PDFInfo
- Publication number
- EP0831215A1 EP0831215A1 EP96306863A EP96306863A EP0831215A1 EP 0831215 A1 EP0831215 A1 EP 0831215A1 EP 96306863 A EP96306863 A EP 96306863A EP 96306863 A EP96306863 A EP 96306863A EP 0831215 A1 EP0831215 A1 EP 0831215A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- throttle
- drum
- throttle shaft
- operating drum
- control device
- 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
- 230000004323 axial length Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
-
- 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
- F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
Definitions
- the present invention relates to a throttle valve control device for rotating a throttle shaft about its own axis by holding an operating drum angularly movable by an accelerator pedal and an operating drum for cruise control independently against a throttle lever that is fixedly mounted on the throttle shaft.
- a throttle shaft 4 is integrally joined to a throttle valve 2 which is supported by a valve casing 1, and a valve opening/closing lever (throttle lever) 6 is fixedly mounted on the throttle shaft 4.
- the valve opening/closing lever 6 has an engaging arm 8 spaced from and extending parallel to the throttle shaft 4.
- the first and second operating members 10, 12 are angularly movable independently of each other and associated with respective return springs 14, 16.
- the first and second operating members 10, 12 In order to allow the first and second operating members 10, 12 to turn smoothly on the throttle shaft 4, the first and second operating members 10, 12 have respective drums 10a, 12a which are mounted on the throttle shaft 4 in axially adjacent relation to each other.
- the drums 10a, 12a have respective axial widths in the directions indicated by the arrow X, which are substantially greater than the widths of the first and second operating members 10, 12.
- the first and second operating members 10, 12 are positioned axially in tandem in the directions indicated by the arrow X. Therefore, the throttle shaft 4 is required to be of an axial length large enough to support the drums 10a, 12a thereon.
- the span or distance from the point on the throttle shaft 4 where the load from the outermost second operating member 12 is applied to the bearing of the valve casing 1 which supports the throttle valve 2 is so large that the throttle shaft 4 tends to cause scuffing on itself and the valve casing 1 when the throttle valve 4 rotates.
- the throttle shaft 4 is subject to large vibrations, resulting in a large load imposed on the throttle shaft 4 and the bearing of the valve casing 1.
- FIG. 1 shows a throttle valve control device 20 according to a first embodiment of the present invention.
- the throttle valve control device 20 may be used in a fuel injector or a carburetor for an internal combustion engine.
- the throttle valve control device 20 is incorporated in a fuel injector combined with the internal combustion engine of an automobile.
- the throttle valve control device 20 includes a valve casing 22 having a passage 24 defined therein and a throttle valve 26 angularly movably mounted in the valve casing 44 for selectively opening and closing the passage 24.
- the throttle valve 26 is fixedly supported on a throttle shaft 28 which has an axial end 30 supported in the valve casing 22.
- the throttle shaft 28 has an opposite axial end angularly movably supported in the valve casing 22 by a bearing 32 and terminating in a distal end portion which has a substantially elliptical cross section shaped by a pair of diametrically opposite recesses 34a, 34b defined therein.
- a throttle lever 36 is mounted on the distal end portion of the throttle shaft 28 and fixedly secured thereto by the recesses 34a, 34b for rotation therewith.
- the throttle lever 36 has a substantially elliptical central hole 37 which is complementary in shape to the substantially elliptical cross section of the throttle shaft 28.
- the throttle lever 36 includes an engaging arm 38 (see FIGS. 1 and 2) radially spaced outwardly from and axially expanding parallel to the throttle shaft 28 in the directions indicated by the arrows X.
- a throttle drum (operating drum) 40 is rotatably mounted on the throttle shaft 28.
- the throttle drum 40 has a drum body 42 extending axially of the throttle shaft 28 and a disk 44 extending radially outwardly from an axial end of the drum body 42 and integrally formed therewith.
- the drum body 42 and the disk 44 may be formed separately from each other and then integrally joined to each other.
- the disk 44 includes a projecting bar 48 extending radially outwardly therefrom for engagement with the engaging arm 38.
- a first wire 50 fixed at one end thereof to the disk 44 extends through a guide 52 of U-shaped cross section and is connected to an accelerator pedal (not shown).
- a first return spring 54 in the form of a coiled torsion spring has an end fixed to the disk 44, and is disposed around the drum body 42. The other end of the first return spring 54 engages a support rod 56 secured to the valve casing 22.
- the first return spring 54 normally urges the throttle drum 40 to turn about its own axis in the direction indicated by the arrow B (see FIGS. 2 and 3) for thereby holding the projecting bar 48 against the support rod 56.
- a cruise control drum (operating drum) 60 is rotatably mounted on the throttle shaft 28 around the first return spring 54.
- the cruise control drum 60 has a drum body 62 extending axially of the throttle shaft 28 and a disk 64 extending radially outwardly from an axial end of the drum body 62 and integrally formed therewith.
- the drum body 62 is disposed around and positioned coaxially with the drum body 42 of the throttle drum 40.
- the drum body 62 has an opening (not shown) defined therein through which the other end of the first return spring 54 extends radially outwardly for engagement with the support rod 56.
- the disk 64 includes a projecting bar 66 extending radially outwardly therefrom for engagement with the engaging arm 38.
- a second wire 68 (see FIG. 1) which has an end fixed to the disk 64 extends through a guide 70 of U-shaped cross section and is connected to a cruise control system (not shown).
- a second return spring 72 in the form of a coiled torsion spring has an end fixed to the disk 64, and is disposed around the drum body 62. The other end of the second return spring 72 engages the support rod 56.
- the cruise control drum 60 is normally urged to turn about its own axis to hold the projecting bar 66 against the support rod 56 under the resiliency of the second return spring 72.
- a first throttle return spring 74a in the form of a coiled torsion spring is interposed between the throttle lever 36 and the valve casing 22 for returning the throttle valve 26 to close the passage 24, and a second throttle return spring 74b in the form of a coiled torsion spring is interposed between the axial end 30 of the throttle shaft 28 and the valve casing 22 for returning the throttle valve 26 to close the passage 24.
- the throttle valve 26 When the accelerator pedal and the cruise control system are not operated, the throttle valve 26 is returned to close the passage 24 under the bias of the first and second throttle return springs 74a, 74b as shown in FIG. 1.
- the cruise control drum 60 is held in position under the bias of the second return spring 27 against angular movement with the throttle drum 40.
- the throttle drum 40 is angularly moved in the direction indicated by the arrow B under the bias of the first return spring 54, back to a return position in which the projecting bar 48 is held against the support rod 56.
- the cruise control drum 60 to which the second wire 68 is secured is angularly moved in the direction indicated by the arrow A against the bias of the second return spring 72.
- the projecting bar 66 of the cruise control drum 60 presses the engaging arm 38, angularly moving the throttle lever 36 in the direction indicated by the arrow A.
- the throttle shaft 28 on which the throttle lever 36 is fixedly mounted is now held in a certain angular position established by the cruise control system.
- the automobile now runs at a constant speed.
- the cruise control drum 60 angularly moves, the throttle drum 40 is prevented from angularly moving with the cruise control drum 60 by the first return spring 54.
- the throttle drum 40 and the cruise control drum 60 are independently rotatably mounted on the throttle shaft 28 in a coaxially double-walled structure around the throttle shaft 28. Therefore, the throttle shaft 28 is much shorter than the throttle shaft of the conventional structure in which the throttle drum 40 and the cruise control drum 60 would be supported axially in tandem on the throttle shaft 28.
- the throttle valve control device 20 has a relatively compact overall size, allowing the throttle drum 40 and the cruise control drum 60 to be positioned as closely to the valve casing 22 as possible.
- the throttle shaft 4 is subject to relatively small vibrations, resulting in a greatly reduced load imposed on the throttle shaft 28 and the bearing 32 and neighboring regions.
- the throttle drum 40 and the cruise control drum 60 are assembled in a radially double-walled structure, their drum bodies 42, 62 may be of a desired effective axial length axially of the throttle shaft 28. The entire weight of the throttle valve control device 20 may thus be reduced, and the throttle drum 40 and the cruise control drum 60 may be angularly moved smoothly on the throttle shaft 28.
- FIG. 4 shows a throttle valve control device 80 according to a second embodiment of the present invention. Those parts shown in FIG. 4 which are identical to those shown in FIG. 1 are denoted by identical reference numerals, and will not be described in detail below.
- the throttle valve control device 80 has a bearing guide 82 disposed radially outwardly of a throttle drum 40 on which a first return spring 54 is disposed, and a cruise control drum (operating drum) 84 on which a second return spring 72 is disposed is slidably mounted on an outer circumferential surface of the bearing guide 82.
- the bearing guide 82 comprises a tubular body 86 radially spaced outwardly from and axially extending in the directions indicated by the arrow X parallel to a throttle shaft 28, and a disk 88 extending radially inwardly from and integral with an axial end of the tubular body 86.
- the disk 88 has a central hole 90 which is complementary in shape to the cross section of the throttle shaft 28.
- the tubular body 86 has an opening 92 including a portion extending axially and having a certain width and another portion extending circumferentially adjacent to the disk 88.
- the opening 92 serves to pass the first return spring 54 radially outwardly therethrough.
- the cruise control drum 84 is of a substantially tubular shape having a drum body 94, a guide 96, and a projecting bar 98.
- the drum body 94 is slidably disposed on the outer circumferential surface of the tubular body 86.
- the bearing guide 82 is angularly movable in unison with the throttle shaft 28, and the tubular body 86 supports the cruise control drum 84. Therefore, the cruise control drum 84 is allowed to angularly move smoothly and reliably around the throttle shaft 28.
- the cruise control drum 84 does not have any portion corresponding to the disk 64 of the cruise control drum 60 according to the first embodiment. Therefore, the cruise control drum 84 is simpler in shape than the cruise control drum 60 according to the first embodiment.
- FIG. 6 shows a throttle valve control device 100 according to a third embodiment of the present invention. Those parts shown in FIG. 6 which are identical to those shown in FIGS. 1 and 4 are denoted by identical reference numerals, and will not be described in detail below.
- the throttle valve control device 100 has a throttle drum (operating drum) 102 is fitted over a set collar 101 and a metal insert 103 which are disposed over a throttle shaft 28. Axially opposite ends of the metal insert 103 are sealed by respective seals 104 disposed on the set collar 101.
- a cruise control drum (operating drum) 106 is disposed around the throttle drum 102, with a first support 108 interposed between a bearing guide 82 and the cruise control drum 106.
- the first support 108 comprises a ring-shaped guide body 110 extending axially of the throttle shaft 28 in the directions indicated by the arrow X and radially spaced a clearance from the outer circumferential surface of a tubular body 86 of the bearing guide 82 or the inner circumferential surface of a drum body 106a of the cruise control drum 106, and a flange 112 extending radially outwardly from an axial end of the ring-shaped guide body 110 and bearing an end of a second return spring 72.
- a second support 114 that is angularly movable with respect to the throttle shaft 28 is disposed between a drum body 102a of the throttled rum 102 and a disk 88 of the bearing guide 82.
- the second support 114 comprises a ring-shaped guide body 116 extending axially of the throttle shaft 28 and guiding a first return spring 54 thereon, and a flange 118 extending radially outwardly from an axial end of the ring-shaped guide body 116 and bearing an end of the first return spring 54.
- the first support 108 and the second support 114 are made of a resin material.
- the throttle drum 102 and the cruise control drum 106 may be made of a metallic material, they are preferably made of a resin material.
- the first support 108 is disposed between the bearing guide 82 fixed to the throttle shaft 28 and the cruise control drum 106 angularly movable with respect to the throttle shaft 28, and a certain clearance is defined between the ring-shaped guide body 110 of the first support 108 and the bearing guide 82 or the cruise control drum 106.
- the cruise control drum 106 can angularly move in unison with the first support 108 reliably with respect to the bearing guide 82, so that the cruise control drum 106 can angularly move smoothly without sticking.
- the first and second supports 108, 114 provided in addition to the bearing guide 82 is effective to simplify the shape of the cruise control drum 106.
- the throttle drum 102 and the cruise control drum 106 can reliably be positioned and are allowed to angularly move highly smoothly.
- first and second supports 108, 114 With the flanges 112, 118 of the first and second supports 108, 114 bearing the first and second return springs 54, 72, respectively, the first and second supports 108, 114 are angularly moved under rotational forces imposed by the first and second return springs 54, 72.
- the first and second supports 108, 114 are thus prevented from damage, and the throttle drum 102, the throttle lever 36, and the bearing guide 82 are also prevented from damage. If they are made of a metallic material, then they are made highly resistant to corrosion by the above arrangement.
- the load on the throttle shaft 28 can be reduced because of a reduced axial length of the throttle drum 102 and the cruise control drum 106, and the throttle drum 102, the cruise control drum 106, and the first and second supports 108, 114 may be made of a resin material.
- the throttle valve control device 100 has a relatively small weight, and any vibrations to which they are subject are relatively small.
- the throttle drum 40 (102) is mounted on the throttle shaft 28, and the cruise control drum 60 (84 or 106) is disposed around the throttle drum 40 (102).
- the cruise control drum 60 (84 or 106) may be disposed on the throttle shaft 28, and the throttle drum 40 (102) may be disposed radially outwardly of the cruise control drum 60 (84 or 106).
- the throttle valve control devices according to the present invention offer the following advantages:
- the throttle valve control devices according to the present invention are subject to relatively small vibrations, and the operating drums are allowed to angularly move independently and smoothly.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
Claims (8)
- A throttle valve control device comprising:a throttle shaft (28);a throttle lever (36) fixedly mounted on said throttle shaft (28);a first operating drum (40) rotatably mounted on said throttle shaft (28) and angularly movable by an accelerator pedal for engaging said throttle lever (36) to angularly move said throttle shaft (28) about its own axis;a second operating drum (60) disposed around said first operating drum (40) and angularly movable by a cruise control system for engaging said throttle lever (36) to angularly move said throttle shaft (28) about its own axis;a first return spring (54) disposed around said first operating drum (40) for normally urging said first operating drum (40) to angularly move back to a predetermined position; anda second return spring (72) disposed around said first return spring (54) for normally urging said second operating drum (60) to angularly move back to a predetermined position.
- A throttle valve control device according to claim 1, wherein said throttle lever (36) has an engaging arm (38) extending axially of said throttle shaft (28), and said first operating drum (40) and said second operating drum (60) have respective projecting bars (48), (66) for individually engaging said engaging arm (38).
- A throttle valve control device according toclaim 1, further comprising: a single support rod (56) extending parallel to said throttle shaft (28), said first return spring (54) and said second return spring (72) having respective ends engaging said single support rod (56).
- A throttle valve control device according to claim 1, further comprising:a pair of supports (108), (114) disposed between said first operating drum (40) and said second operating drum (60) and angularly movable with respect to said throttle shaft (28);said supports (108), (114) having respective ring-shaped guide bodies (110), (116) extending axially of said throttle shaft (28) and respective flanges (112), (118) extending radially from said ring-shaped guide bodies (110), (116) and bearing said first and second return springs (54), (72), respectively.
- A throttle valve control device according to claim 1, further comprising:a bearing guide (82) disposed between said first operating drum (40) and said second operating drum (84), said second operating drum (84) being supported by said bearing guide (82).
- A throttle valve control device according to claim 5, wherein said bearing guide comprises:a disk (88) fixedly mounted on said throttle shaft (28); anda tubular body (86) extending axially of said throttle shaft (28) from said disk (88), said second operating drum (84) being slidably supported on an outer circumferential surface of said tubular body (86).
- A throttle valve control device according to claim 6, further comprising:a first support (108) disposed between said bearing guide (82) and said second operating drum (106) and angularly movable with respect to said throttle shaft (28);said first support (108) comprising a ring-shaped guide body (110) extending axially of said throttle shaft (28) and radially spaced a clearance from an outer circumferential surface of said bearing guide (82) or an inner circumferential surface of said second operating drum (106), and a flange (112) extending radially outwardly from said ring-shaped guide body (110) and bearing an end of said second return spring (72).
- A throttle valve control device according to claim 6, further comprising:a second support (114) disposed between said bearing guide (82) and said first operating drum (102) and angularly movable with respect to said throttle shaft (28);said second support (114) comprising a ring-shaped guide body (116) extending axially of said throttle shaft (28) and guiding said first return spring (54), and a flange (118) extending radially outwardly from said ring-shaped guide body (116) and bearing an end of said first return spring (54).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996611673 DE69611673T2 (en) | 1996-09-20 | 1996-09-20 | Throttle valve control device |
EP19960306863 EP0831215B1 (en) | 1996-09-20 | 1996-09-20 | Throttle valve control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19960306863 EP0831215B1 (en) | 1996-09-20 | 1996-09-20 | Throttle valve control device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0831215A1 true EP0831215A1 (en) | 1998-03-25 |
EP0831215B1 EP0831215B1 (en) | 2001-01-24 |
Family
ID=8225087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960306863 Expired - Lifetime EP0831215B1 (en) | 1996-09-20 | 1996-09-20 | Throttle valve control device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0831215B1 (en) |
DE (1) | DE69611673T2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1083313A2 (en) * | 1999-09-08 | 2001-03-14 | Siemens Canada Limited | Throttle shaft assembly and method of attachment of said shaft to a throttle body |
EP1375872A1 (en) * | 2002-06-17 | 2004-01-02 | Siemens Aktiengesellschaft | A drive mechanism with an electromotor driving a mechanical transmission with a forceback facility |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016101635B4 (en) | 2016-01-29 | 2019-02-28 | Rainer Diederich | Cable drive for a throttle valve of a vehicle, in particular an ATV or UTV |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61226530A (en) * | 1985-04-01 | 1986-10-08 | Yamaha Motor Co Ltd | Throttle valve controller of vehicle |
JPS62130140U (en) * | 1986-02-10 | 1987-08-17 | ||
JPS63167037A (en) * | 1986-12-29 | 1988-07-11 | Honda Motor Co Ltd | Throttle control device for engine for vehicle |
GB2211890A (en) * | 1987-10-30 | 1989-07-12 | Fuji Heavy Ind Ltd | Engine throttle valve motor vehicle speed control |
JPH0586906A (en) * | 1991-09-30 | 1993-04-06 | Nippondenso Co Ltd | Rotational speed controller for internal combustion engine |
JPH07246857A (en) * | 1994-03-10 | 1995-09-26 | Toyota Motor Corp | Cruise control device for internal combustion engine |
-
1996
- 1996-09-20 DE DE1996611673 patent/DE69611673T2/en not_active Expired - Lifetime
- 1996-09-20 EP EP19960306863 patent/EP0831215B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61226530A (en) * | 1985-04-01 | 1986-10-08 | Yamaha Motor Co Ltd | Throttle valve controller of vehicle |
JPS62130140U (en) * | 1986-02-10 | 1987-08-17 | ||
JPS63167037A (en) * | 1986-12-29 | 1988-07-11 | Honda Motor Co Ltd | Throttle control device for engine for vehicle |
GB2211890A (en) * | 1987-10-30 | 1989-07-12 | Fuji Heavy Ind Ltd | Engine throttle valve motor vehicle speed control |
JPH0586906A (en) * | 1991-09-30 | 1993-04-06 | Nippondenso Co Ltd | Rotational speed controller for internal combustion engine |
JPH07246857A (en) * | 1994-03-10 | 1995-09-26 | Toyota Motor Corp | Cruise control device for internal combustion engine |
Non-Patent Citations (4)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 071 (M - 567) 4 March 1987 (1987-03-04) * |
PATENT ABSTRACTS OF JAPAN vol. 012, no. 434 (M - 764) 16 November 1988 (1988-11-16) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 423 (M - 1458) 6 August 1993 (1993-08-06) * |
PATENT ABSTRACTS OF JAPAN vol. 95, no. 009 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1083313A2 (en) * | 1999-09-08 | 2001-03-14 | Siemens Canada Limited | Throttle shaft assembly and method of attachment of said shaft to a throttle body |
EP1083313A3 (en) * | 1999-09-08 | 2001-09-05 | Siemens Canada Limited | Throttle shaft assembly and method of attachment of said shaft to a throttle body |
EP1375872A1 (en) * | 2002-06-17 | 2004-01-02 | Siemens Aktiengesellschaft | A drive mechanism with an electromotor driving a mechanical transmission with a forceback facility |
Also Published As
Publication number | Publication date |
---|---|
DE69611673T2 (en) | 2001-05-17 |
DE69611673D1 (en) | 2001-03-01 |
EP0831215B1 (en) | 2001-01-24 |
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