GB2245932A - I.c engine intake throttle body - Google Patents
I.c engine intake throttle body Download PDFInfo
- Publication number
- GB2245932A GB2245932A GB9108798A GB9108798A GB2245932A GB 2245932 A GB2245932 A GB 2245932A GB 9108798 A GB9108798 A GB 9108798A GB 9108798 A GB9108798 A GB 9108798A GB 2245932 A GB2245932 A GB 2245932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve element
- passageway
- induction system
- closed position
- rotation
- 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
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
- 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
- F02D9/1035—Details of the valve housing
- F02D9/1055—Details of the valve housing having a fluid by-pass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/08—Thermoplastics
Abstract
A plastics body 21 defines a passageway 30 in which is rotatably mounted a plastics valve element 27 with a thickened rim portion 35 having a part spherical outwardly facing surface 34. During initial opening of the valve element 27 from a closed position the cross sectional area between the part spherical surface and the passageway remains constant until the valve element 27 reaches a predetermined rotation where the part spherical surface no longer has any effect thereby producing a more gradual increase in cross sectional area of the passageway 30 for initial valve element 27 opening. The passageway (130, Figs. 9 and 10) may define a step of crescent shape at the junction of two bores (131, 132) with a seal (143). The rim of the valve element (127) opposite the thickened portion (135) has a lip (145) which co-operates with the seal. <IMAGE>
Description
AN INDUCTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
This invention relates to internal combustion engines and in particular to an induction system and air flow control device therefor.
It is known for example from US 4,572,478 to provide as part of an induction system an air flow control device often known as a throttle body for an induction system of an internal combustion engine having a die cast aluminium body with a through bore in which is rotatably mounted a disc type valve element. The disc type valve element of such a prior art air flow control device is pivotally mounted in a bore within the throttle body in such a manner that when the disc valve is in its closed position there is a crescent shaped gap between the disc valve and the bore.
It is a problem with such prior art air flow control devices that upon initial opening of the disc valve from the closed position the flow of air through the throttle body is difficult to control accurately.
According to the invention there is provided an induction system for an internal combustion engine including a flow control device comprising a body defining a longitudinal passageway extending between first and second ends of the body and a valve element rotatably supported within the passageway for rotation about an axis of rotation to vary the cross-sectional area of the passageway through which flow is possible wherein the valve element is a flat plate of substantially uniform thickness to one side of its axis of rotation and has a thickened rim portion to the other side of its axis of rotation the thickened rim portion having a part spherical outer surface.
The provision of the part spherical outer surface reduces the initial rate of increase of cross-sectional area as the valve element is moved from a closed position.
Preferably, the valve element is a plastic valve element and the body is a plastic body.
This has the advantage of reduced cost of manufacture.
Advantageously, the body and the valve element are both made from the same type of plastic material.
This has the advantage of reducing the problems caused by expansion and contraction of the body and valve element.
Preferably, the passageway is formed by two bores the juncture of which forms a step defining a substantially crescent shaped face which forms a stop preventing rotation of the valve element beyond a closed position.
This has the advantage that no external stop mechanism is required thereby reducing the cost of the induction system and eliminating the need for setting of the stop position which is usual with an external stop mechanism.
Preferably, when the valve element is in the closed position providing the minimum cross-sectional area of passageway through which flow is possible a portion of the valve element is in sealing contact with the crescent shaped face.
The portion of the valve element in sealing contact with the crescent shaped face may be a lip around the circumferential edge of the valve element extending radially from the thickened rim.
Preferably, the portion of the passageway facing the part spherical surface of the thickened rim portion of the valve element when the valve element is in a closed position is a complimentary part spherical surface.
Advantageously, the part spherical portion of the passageway and the part spherical rim portion of the valve element define a narrow crescent shaped passageway when the valve element is at or near said closed position.
This has the advantage that the flow through the crescent shaped passageway is restricted during initial opening of the flow control valve allowing more accurate control of the flow to be obtained.
The invention will now be described by way of example with reference to the accompanying drawing of which:
Figure 1: is a schematic drawing of an internal combustion
engine and an induction system therefor;
Figure 2: is a plan view of an air flow control device
forming part of an induction system according to a
first embodiment of the invention;
Figure 3: is a side view in the direction of arrow 'A' on
figure 2;
Figure 4: is a cross-section on the line X-X on figure 2;
Figure 5: is an end view in the direction of arrow 'B' on
figure 4;
Figure 6: is an end view in the direction of arrow 'C' in
figure 4;
Figure 7: is a cross-section through an air flow control
device forming part of an induction system
according to a second embodiment of the invention;
Figure 8: is a staggered cross-section on the line Y-Y on
figure 7.
With particular reference to Figure 1 there is shown an engine 14 having an induction system comprising an inlet manifold 13, an air flow control device 12 and an air cleaner 11.
The air flow control device 12 includes a moveable disc valve element 17 to vary the volume of air drawn in through the air cleaner 11 to the engine 11 through the inlet manifold 13.
The valve element 17 is moveable by means of a cable 24 connected to a driver operable pedal 25.
With particular reference to figures 2 to 6 there is shown an air flow control device according to a first embodiment of the invention the air flow control device having a body 21 injection moulded from a rigid plastic material such as fibre reinforced Nylon and defines a passageway 30 in which is rotatably supported a disc valve element 27.
The passageway 30 extends from a first end 22 of the body to a second end 23 of the body 21.
The passageway 30 is defined by a first bore 31 extending from the first end 22 and a second bore 32 extending from the second end 23.
The interaction of the first and second bores 31 and 32 at the position of juncture forms a step having an arcuate or crescent shaped face 33.
The first bore 31 adjoining the face 33 is in the form of a part spherical surface 34.
The disc valve element -27 is rotatable about an axis of rotation R-R which is substantially normal to the longitudinal axis of the passageway 30 and intersects the longitudinal axis of the passageway 30 at a position between said first and second ends 22 and 23 of the body 21.
The distance of the arcuate face 33 from the second end 23 is approximately the same as the corresponding distance from the second end 23 to the axis of rotation R-R of the valve element 27.
The disc valve element 27 is injection moulded from a resilient but rigid plastic material such as glass reinforced nylon and is attached to a shaft 28 by means of two screws 29.
The valve element 27 has a transverse groove 26 in which is located with clearance the shaft 28.
The disc valve element 27 has a thickened rim portion 35 formed around part of its outer periphery to one side of its axis of rotation R-R and is of substantially uniform thickness on the other side of the axis of rotation R-R.
The outer surface of the thickened rim 35 is part spherical and complimentary to the part spherical surface 34. When the valve element 27 is at or near its closed position the thickened rim 35 and the part spherical surface 34 define a crescent shaped passageway that is relatively long with respect to its radial width.
The thickened rim 35 has a radially extending lip 36 around its outer periphery for cooperation with the second arcuate face 33 to provide a positive stop means.
Abutment of the lip 36 with the arcuate face 33 is used to prevent rotation of the disc valve element 27 beyond the closed position without the need for an external stop mechanism.
The dimensions of the disc valve element 27 are such that a crescent shaped gap 'G' is present between the non thickened portion of the valve element 27 and the adjacent wall of the passageway 30.
To allow for the gap 'G' to be accurately set without the need for great accuracy in the respective dimensions of the valve element 27 and bores 31 and 32 the valve element 27 can be transversely adjusted by loosening the screws 29.
The size of the gap 'G' will effect the leakage of air past the valve element 27 when it is in a closed position obscuring the passageway 30.
In the closed position the lip 36 is in sealing engagement with the arcuate face 33 preventing the flow of air through the crescent shaped passageway between the spherical surface 34 and the thickened rim 35 and so in this position the flow is predominantly through the gap 'G'.
However, to trim the flow when the valve element 27 is in the closed position a passageway around the disc valve element 27 is provided in the form of a bypass passage 38 connecting the first bore 31 with the second bore 32.
The bypass passage 38 is partly formed by a passageway in a housing 40. An idle speed control valve 39 is positioned in the passageway to control the amount of air that is permitted to bypass the disc valve element 27 through the bypass passage 38.
The idle speed control valve 39 is moved by a stepper motor 41 to control the flowrate of air through the bypass passage 38 appropriate to the running conditions of the engine as sensed by an engine control unit (not shown).
Such engine control units are well known for example a fuel controlling system for an internal combustion engine is disclosed in GB 2,200,768 and an electronic throttle valve system is disclosed in US 4,831,985 these Patents are incorporated by reference as if the entire contents thereof were set forth herein.
The engine control unit receives information from various sensors located on the engine and the exhaust system of the engine which are used to provide a control signal to the stepper motor 41 with the object of providing smooth idling with low emissions.
Operation of the air flow device as part of the induction system for an internal combustion engine is as follows.
When the engine is idling the disc valve element 27 is in the closed position shown in figures 2 to 6 thereby providing the maximum restriction to the flow of air and hence into the engine.
The actual flowrate of air through the passageway 30 when the valve element 27 is in its closed position will depend upon the leakage past the disc valve element 27 and the flow of air through the bypass passage 38.
The part spherical form of the rim 35 is complimentary to the adjacent wall 34 and therefore upon initial rotation of the valve element 27 away from the closed position the distance between these surfaces remains constant and the only change in leakage past the valve element 27 occurs through the increasing cresent shaped aperture between the periphery of the valve element 27 diametrically opposite the thickened rim 35 and the adjacent wall of the passageway 30.
Therefore, at least upon initial rotation of the valve element 27 the rate of increase of passageway cross sectional area uncovered is less than would be the case if the valve element 27 were the same as shown in the prior art
Patent US 4,572,478 referred to above.
In the fully open position the disc valve element 27 lies approximately parallel to the longitudinal axis L-L and has the minimum restricting effect on the flow of air through the passageway 30 and so this position is often referred to as the full throttle or wide open position.
With particular reference to figures 8 and 9 there is shown an induction system device according to a second embodiment of the invention in which an air flow control device 112 has an injection moulded rigid plastic body 121 defining a passageway 130 in which is rotatably supported a disc valve element 127.
The passageway 130 extends from a first end 122 of the body to a second end 123 of the body 121 along a longitudinal axis M-M.
The disc valve element 127 is attached to a shaft 128 by means of a screw 129 entending through a clearance hole 137 in the valve element 127.
The shaft 128 is located with clearance in a groove 126 in the valve element 127.
The disc valve element 127 is supported by the body 121 to allow rotation about an axis of rotation P-P which is substantially normal to the longitudinal axis M-M of the passageway 130.
The axis of rotation P-P intersecting the longitudinal axis
M-M of the passageway 130 at a position between said first and second ends 122 and 123 of the body 121.
The passageway 130 is defined by a first bore 131 having tapered and parallel sections extending from the first end 122 and a second bore 132 extending from the second end 123.
The interaction of the first and second bores 131 and 132 at the position of juncture forms a step defining a first sealing surface.
The first sealing surface faces towards the first end 122 of the body 121 and is in the form of a first arcuate face 133.
A second sealing surface 134 is defined by the part cylindrical wall 142 of the part of the passageway 130 which is common to the first and second bores 131 and 132.
The disc valve element 127 is injection moulded from a resilient plastic material such as fibre reinforced nylon and has a lip 145 formed as a integral part thereof around part of its outer periphery for cooperation with a seal 143 co-moulded to the first arcuate face 133.
The disc valve element 127 has a thickened rim portion 135 formed around part of its outer periphery to one side of its axis of rotation P-P and is apart from the lip 145 of substantially uniform thickness on the other side of the axis of rotation P-P. The outer surface of the thickened rim 135 is part spherical.
The disc valve element 127 can be transversely adjusted to alter the gap 'G' between rim the portion 135 of the valve element 127 furthest from the axis P-P and the wall 142 by loosening the screw 129.
This allows for the gap 'G' to be accurately set without the need for great accuracy in the relative dimensions of the valve element 127 and bore 132.
The size of the gap 'G' will effect the leakage of air past the valve element 127 when the valve element 127 is in the closed position obscuring the passageway 130 as shown in figures 8 and 9.
Because the outer surface of the rim portion 135 is part spherical initial rotation of the valve element 127 away from the closed position will not effect the gap 'G' and the only change in leakage past the valve element 127 occurs through the increasing aperture between the lip 145 and the seal 143.
The first arcuate face 133 is parallel to but offset from a plane along the axis of rotation P-P of the disc valve element 127 arranged normal to the longitudinal axis M-M of the passageway 130.
The distance of the seal 143 from the first end 122 as indicated by the reference numerals L1 is greater than the corresponding distance from the first end 122 to the axis of rotation P-P of the valve element 127 as indicated by the numerals S1 this permits at least 90 degrees of valve element 127 rotation from the closed position to the fully open position when the valve element 127 is positioned substantially parallel to the axis M-M.
A bypass passage 138 connects the first bore 131 with the second bore 132 to provide a controllable leakage path around the disc valve element 127 when the disc valve element 127 is in its closed position obscuring the passageway 130.
An idle speed control valve 139 is positioned in an integrally moulded housing 140 defining part of the bypass passage 138.
The idle speed control valve 139 is moveable by a stepper motor 141 to control the amount of air that is permitted to bypass the disc valve element 127 through the bypass passage 138.
A trim screw 146 is provided to regulate the flow of air through a trickle passage 147 joining the inlet and outlet of the bypass passage 138.
The trim screw 146 is threadingly engaged with a metal bush 148 moulded in situ with the body 121.
The trim screw 146 allows the volume of air passing through the air flow control device 112 to be accurately set when the disc valve element 127 is in the closed position and the bypass valve 139 is in the closed position.
The bypass valve 139 is moved by the stepper motor 141 in response to an engine control unit (not shown) to control the flow through the passageway 130 when the valve element 127 is in its closed position.
Such engine control units are well known.
Although the invention has been described with reference to two preferred embodiments it is not to be construed as limited to these embodiments. For example the cable linkage to the valve element could be replaced by a mechanical linkage or drive by wire type system.
Claims (12)
1. An induction system for an internal combustion engine
including a flow control device comprising a body
defining a longitudinal passageway extending between
first and second ends of the body and a valve element
rotatably supported within the passageway for rotation
about an axis of rotation to vary the cross-sectional
area of the passageway through which flow is possible
wherein the valve element is a flat plate of
substantially uniform thickness to one side of its axis
of rotation and has a thickened rim portion to the
other side of its axis of rotation the thickened rim
portion having a part spherical outer surface.
2. An induction system as claimed in Claim 1 in which the
valve element is a plastic valve element.
3. An induction system as claimed in Claim 1 or in Claim 2
which the body is a plastic body.
4. An induction system as claimed in Claim 3 in which the
body and the valve element are both made from the same
type of plastic material.
5. An induction system as claimed in any preceding claim
in which the passageway is formed by two bores the
juncture of which forms a step defining a substantially
crescent shaped face.
6. An induction system as claimed in claim 5 in which the
crescent shaped face forms a stop preventing rotation
of the valve element beyond a closed position.
7. An induction system as claimed in Claim 6 in which
when the valve element is in the closed position
providing the minimum cross-sectional area of
passageway through which flow is possible a portion of
the valve element is in sealing contact with the
crescent shaped face.
8. An induction system as claimed in Claim 7 in which the
portion of the valve element in sealing contact with
the crescent shaped face is a lip around the
circumferential edge of the valve element.
9. An induction system as claimed in Claim 8 in which the
lip extends radially from the thickened rim.
10. An induction system as claimed in any preceding claim
in which the portion of the passageway facing the part
spherical surface of the thickened rim portion of the
valve element when the valve element is in a closed
position is a complimentary part spherical surface.
11. An induction system as claimed in Claim 10 in which the
part spherical portion of the passageway and the part
spherical rim portion of the valve element define a
narrow crescent shaped passageway when the valve
element is at or near said closed position.
12. An induction system for an internal combustion engine
substantially as described herein with reference to the
accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9015171A GB2245931A (en) | 1990-07-10 | 1990-07-10 | I.c. engine air intake throttle body |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9108798D0 GB9108798D0 (en) | 1991-06-12 |
| GB2245932A true GB2245932A (en) | 1992-01-15 |
| GB2245932B GB2245932B (en) | 1994-08-03 |
Family
ID=10678883
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9015171A Withdrawn GB2245931A (en) | 1990-07-10 | 1990-07-10 | I.c. engine air intake throttle body |
| GB9108798A Expired - Fee Related GB2245932B (en) | 1990-07-10 | 1991-04-24 | An induction system for an internal combustion engine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9015171A Withdrawn GB2245931A (en) | 1990-07-10 | 1990-07-10 | I.c. engine air intake throttle body |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2245931A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0589733A1 (en) * | 1992-08-21 | 1994-03-30 | Magneti Marelli France | Progressively shaped throttle valve body and manufacturing method thereof |
| EP0628711A1 (en) * | 1993-06-09 | 1994-12-14 | General Motors Corporation | A throttle mechanism |
| WO1996023965A1 (en) * | 1995-02-01 | 1996-08-08 | Ab Elektronik Gmbh | Throttle valve system |
| WO1996035047A1 (en) * | 1995-05-05 | 1996-11-07 | Robert Bosch Gmbh | Throttle device for an internal combustion engine |
| DE19600567A1 (en) * | 1996-01-09 | 1997-03-27 | Daimler Benz Ag | Exhaust throttle for internal combustion engine |
| WO2001009498A1 (en) * | 1999-08-03 | 2001-02-08 | Filterwerk Mann+Hummel Gmbh | Valve |
| AT410245B (en) * | 1993-07-14 | 2003-03-25 | Bosch Gmbh Robert | PLASTIC MOLDED BODY |
| EP1422404A1 (en) * | 2001-08-31 | 2004-05-26 | Keihin Corporation | Engine suction rate controller |
| WO2007029104A2 (en) | 2005-09-08 | 2007-03-15 | Toyota Jidosha Kabushiki Kaisha | Intake port structure for internal combustion engine |
| EP1995435A1 (en) * | 2006-03-07 | 2008-11-26 | Mikuni Corporation | Engine control device and two-wheeled vehicle |
| JP2015229926A (en) * | 2014-06-03 | 2015-12-21 | 愛三工業株式会社 | Throttle valve control device for vehicle |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4329526A1 (en) * | 1993-09-02 | 1995-03-09 | Mann & Hummel Filter | Throttle device |
| DE4329527A1 (en) * | 1993-09-02 | 1995-03-09 | Mann & Hummel Filter | Throttle device |
| BE1011130A3 (en) * | 1997-04-25 | 1999-05-04 | Solvay | Shutter device. |
| US5878715A (en) * | 1997-12-23 | 1999-03-09 | Ford Global Technologies, Inc. | Throttle body with intake manifold snap-fit attachment |
| US5988131A (en) * | 1997-12-23 | 1999-11-23 | Ford Global Technologies, Inc. | Air intake system with composite throttle body |
| US6543404B2 (en) | 2001-04-04 | 2003-04-08 | Dow Global Technologies, Inc. | Adhesively bonded engine intake manifold assembly |
| DE10136936A1 (en) * | 2001-07-28 | 2003-02-06 | Mann & Hummel Filter | Closure element, in particular for a suction channel of an internal combustion engine |
| DE10258895B4 (en) * | 2002-12-17 | 2006-02-09 | Pierburg Gmbh | Switching flap device |
| DE20311260U1 (en) * | 2003-07-22 | 2004-12-02 | Friedrich Boysen Gmbh & Co. Kg | Shut-off arrangement for shutting off a fluid flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB244721A (en) * | 1924-12-17 | 1926-08-05 | Solex | Improvements in carburettors |
| GB392183A (en) * | 1931-10-06 | 1933-05-08 | Merl Ruskin Wolfard | Improvements in and relating to carburettors |
| GB1061651A (en) * | 1963-03-06 | 1967-03-15 | Villiers Engineering Co Ltd | Carburetters for internal combustion engines |
| GB1406842A (en) * | 1971-08-16 | 1975-09-17 | Ingbuero Fuer Angewandte Physi | Carburettor for an internal combustion engine |
| US4491106A (en) * | 1982-11-29 | 1985-01-01 | Morris George Q | Throttle configuration achieving high velocity channel at partial opening |
| US4572478A (en) * | 1982-11-29 | 1986-02-25 | Vdo Adolf Schindling Ag | Throttle-valve connection piece |
| US4633833A (en) * | 1984-06-04 | 1987-01-06 | Morris George Q | Throttles with high velocity airstream collision |
| WO1989000639A1 (en) * | 1987-07-10 | 1989-01-26 | Ford Motor Company Limited | Throttle valve for an internal combustion engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1034106A (en) * | 1974-07-22 | 1978-07-04 | Avm Corporation | Butterfly valve |
| US4605201A (en) * | 1979-05-03 | 1986-08-12 | Okumura Engineering Works Co., Ltd. | Butterfly valve |
| US4776313A (en) * | 1987-06-01 | 1988-10-11 | Ford Motor Company | Compact integrated engine induction air/fuel system |
-
1990
- 1990-07-10 GB GB9015171A patent/GB2245931A/en not_active Withdrawn
-
1991
- 1991-04-24 GB GB9108798A patent/GB2245932B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB244721A (en) * | 1924-12-17 | 1926-08-05 | Solex | Improvements in carburettors |
| GB392183A (en) * | 1931-10-06 | 1933-05-08 | Merl Ruskin Wolfard | Improvements in and relating to carburettors |
| GB1061651A (en) * | 1963-03-06 | 1967-03-15 | Villiers Engineering Co Ltd | Carburetters for internal combustion engines |
| GB1406842A (en) * | 1971-08-16 | 1975-09-17 | Ingbuero Fuer Angewandte Physi | Carburettor for an internal combustion engine |
| US4491106A (en) * | 1982-11-29 | 1985-01-01 | Morris George Q | Throttle configuration achieving high velocity channel at partial opening |
| US4572478A (en) * | 1982-11-29 | 1986-02-25 | Vdo Adolf Schindling Ag | Throttle-valve connection piece |
| US4633833A (en) * | 1984-06-04 | 1987-01-06 | Morris George Q | Throttles with high velocity airstream collision |
| WO1989000639A1 (en) * | 1987-07-10 | 1989-01-26 | Ford Motor Company Limited | Throttle valve for an internal combustion engine |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0589733A1 (en) * | 1992-08-21 | 1994-03-30 | Magneti Marelli France | Progressively shaped throttle valve body and manufacturing method thereof |
| EP0628711A1 (en) * | 1993-06-09 | 1994-12-14 | General Motors Corporation | A throttle mechanism |
| AT410245B (en) * | 1993-07-14 | 2003-03-25 | Bosch Gmbh Robert | PLASTIC MOLDED BODY |
| WO1996023965A1 (en) * | 1995-02-01 | 1996-08-08 | Ab Elektronik Gmbh | Throttle valve system |
| WO1996035047A1 (en) * | 1995-05-05 | 1996-11-07 | Robert Bosch Gmbh | Throttle device for an internal combustion engine |
| DE19600567A1 (en) * | 1996-01-09 | 1997-03-27 | Daimler Benz Ag | Exhaust throttle for internal combustion engine |
| WO2001009498A1 (en) * | 1999-08-03 | 2001-02-08 | Filterwerk Mann+Hummel Gmbh | Valve |
| EP1422404A1 (en) * | 2001-08-31 | 2004-05-26 | Keihin Corporation | Engine suction rate controller |
| EP1422404A4 (en) * | 2001-08-31 | 2008-05-14 | Keihin Corp | Engine suction rate controller |
| WO2007029104A2 (en) | 2005-09-08 | 2007-03-15 | Toyota Jidosha Kabushiki Kaisha | Intake port structure for internal combustion engine |
| WO2007029104A3 (en) * | 2005-09-08 | 2007-05-03 | Toyota Motor Co Ltd | Intake port structure for internal combustion engine |
| US7900595B2 (en) | 2005-09-08 | 2011-03-08 | Toyota Jidosha Kabushiki Kaisha | Intake port structure for internal combustion engine |
| EP1995435A1 (en) * | 2006-03-07 | 2008-11-26 | Mikuni Corporation | Engine control device and two-wheeled vehicle |
| EP1995435A4 (en) * | 2006-03-07 | 2011-12-07 | Mikuni Kogyo Kk | Engine control device and two-wheeled vehicle |
| JP2015229926A (en) * | 2014-06-03 | 2015-12-21 | 愛三工業株式会社 | Throttle valve control device for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2245931A (en) | 1992-01-15 |
| GB9108798D0 (en) | 1991-06-12 |
| GB9015171D0 (en) | 1990-08-29 |
| GB2245932B (en) | 1994-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |