EP0466227A1 - Valve assembly - Google Patents
Valve assembly Download PDFInfo
- Publication number
- EP0466227A1 EP0466227A1 EP91201535A EP91201535A EP0466227A1 EP 0466227 A1 EP0466227 A1 EP 0466227A1 EP 91201535 A EP91201535 A EP 91201535A EP 91201535 A EP91201535 A EP 91201535A EP 0466227 A1 EP0466227 A1 EP 0466227A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- valve
- inner race
- valve bore
- race
- 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- Withdrawn
Links
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
- F02D9/08—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
- F02D9/1065—Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like
-
- 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
- F02D9/106—Sealing of the valve shaft in the housing, e.g. details of the bearings
Abstract
A valve assembly (10) for regulating air flow to an internal combustion engine comprises a valve body (12) having a valve bore (14) forming an induction passage, and a shaft (16) extending across the valve bore. A valve member (18) having a chamfered peripheral edge (24) is secured to the shaft for rotation in excess of 90 degrees between a non-actuating position and a maximum actuating position. A return mechanism (26) urges the valve member toward the non-actuating position when the valve member is rotated away from the non-actuating position.
Description
- This invention relates to a valve assembly for regulating the air flow to an internal combustion engine. More particularly, the invention relates to a valve assembly for an electronic throttle control system for an internal combustion engine.
- Electronic throttle control systems for internal combustion engines frequently utilize a rotatable valve member disposed in an engine air induction passage to regulate the air flow through the passage. The valve member can be a throttle valve which is positioned by an operator by way of a motor and shaft to control air flow to the internal combustion engine. Air flow to the internal combustion engine varies as a function of the air flow area around the valve member.
- The air flow valve area around the valve member is geometrically related to the angular position of the valve member. In many valve assemblies, the change in air flow area around the valve member is substantial when the valve member is near its minimum air flow position. This can decrease control of the air flow to the internal combustion engine during low load conditions. Also, the air flow around the valve member when the motor is not actuated can be sufficiently restricted to prevent the internal combustion engine from producing enough power to idle or drive the vehicle.
- Moreover, in some valve assemblies, an axial load on the shaft can cause the throttle valve to scrape on its bore. The wear which can result tends to admit more air flow though the valve body than was originally calibrated. This can allow increased air flow around the valve member, which can be relatively substantial when the valve member is near its minimum air flow position. This can further decrease control of the air flow to the internal combustion engine during low load conditions. Mechanisms to control endplay of the shafts are known, but many are difficult to assemble to the valve body. Examples of the prior art can be found in US Patent Nos. 4462358, 4474150 and 4860706.
- A valve assembly in accordance with the present invention is characterised over US Patent No. 4474150 by the features specified in the characterising portion of claim 1.
- The present invention provides a valve assembly for regulating air flow to an internal combustion engine comprising a valve body having a valve bore forming an induction passage, and a shaft extending across the valve bore. A valve member having a peripheral edge which is chamfered secured to the shaft for rotation in excess of 90 degrees between a non-actuating position and a maximum actuating position. A return mechanism urges the valve member toward the non-actuating position when the valve member is rotated away from the non-actuating position.
- The shaft may extend through a ball bearing disposed in a shaft socket. In this case, a spring washer is disposed between the ball bearing and the shaft socket to resist displacement of the outer race of the ball bearing toward the valve bore; and a thrust collar is secured to the end of the shaft to resist displacement of the inner race of the ball bearing away from the valve bore.
- The rotation of the valve member in excess of 90 degrees enables a relatively low change in air flow around the valve member when the valve member is rotated between the positions at which the minimum air flow is produced, thereby facilitating control of the air flow at low engine loads. The chamfered peripheral edge reduces sharp changes in the air flow as the valve member approaches and moves away from the wall of the valve bore during decreases and increases in the air flow, respectively. The engagement of the ball bearing with the shaft and the valve body limits axial float or displacement of the shaft with respect to the bore.
- The present invention will now be described by way of example, with reference to the following description of a specific embodiment of the invention taken together with the accompanying drawings, in which:-
- Figure 1 is an elevational view of the valve assembly of the present invention;
- Figure 2 is a sectional elevational view of the valve assembly on the line 2-2 of Figure 1;
- Figure 3 is a schematic view through the valve assembly generally in the plane indicated by line 3-3 of Figure 2;
- Figure 4 is an enlarged view of the portion of Figure 3 circled by
line 4 showing the chamfer at the peripheral edge of the valve member; - Figure 5 is a graph showing the flow area allowed by the valve assembly of Figure 1 for various angles of the valve member and for various thicknesses of the peripheral edge of the valve member; and
- Figure 6 is an enlarged view of the portion of Figure 2 circled by line 6 showing one of the ball bearings which limits end play.
- Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.
- Referring now to the drawings in detail, numeral 10 generally indicates a valve assembly of the present invention for regulating air flow to an internal combustion engine. The valve assembly 10 comprises a
valve body 12 having avalve bore 14 forming an induction passage for air flow to an internal combustion engine (not shown) with the valve bore having a generally circular cross section of substantially uniform diameter. Ashaft 16 has opposite ends which are journalled for rotation in thevalve body 12. Theshaft 16 extends across the valve bore 14. - A (flat butterfly)
valve member 18 is secured to theshaft 16 for rotation between a non-actuating position, indicated in phantom bynumeral 20, and a maximum actuating position, indicated in phantom bynumeral 22. Thevalve member 18 allows the maximum air flow when in the maximum actuatingposition 22. Thevalve member 18 is typically parallel to the axis of the valve bore 14 when in the maximum actuatingposition 22. Thevalve member 18 is rotated approximately 95 degrees between the maximum actuatingposition 22 and thenon-actuating position 20. The rotation of thevalve member 18 between the maximum actuatingposition 22 and thenon-actuating position 20 enables control of the air flow through thevalve bore 14. Thenon-actuating position 20 can be defined by engagement of ashaft boss 17 with anon-actuating stop 21 fixed to thevalve body 12. Theshaft boss 17 is fixed to a pulley which is fixed to theshaft 16. Similarly, the maximum actuatingposition 22 can be defined by engagement of theshaft boss 17 with an actuatingstop 23 fixed to thevalve body 12. - An actuator includes a
toothed timing belt 28 which wraps around a correspondingly toothed pulley which is connected to theshaft 16 to produce rotation of thevalve member 18. The actuator includes amotor 29 having a toothed pulley which thetiming belt 28 also wraps around. Themotor 29 rotates its pulley to cause displacement of thetiming belt 28 to rotate thevalve member 18. An adjustable tensioner can enable adjustment in the distance between theshaft 16 and motor shaft to adjust the tension in thetiming belt 28. - The
valve member 18, shown in Figure 3, has aperipheral edge 24 which is chamfered, wherein, when the valve member is rotated away from themaximum actuating position 22, the upstream side of the valve member is inclined toward the peripheral edge. The thickness of thevalve member 18 thereby decreases in the radial direction toward theperipheral edge 24. - A return means 26, such as a single coil torsional spring, acts on the
valve member 18 when the valve member is rotated away from thenon-actuating position 20 to urge the valve member toward the non-actuating position. - Figure 5 is a graph showing the flow area of the valve assembly 10 for various angles of the
valve member 18 and for various thicknesses of theperipheral edge 24. The graph is based on theoretical calculations. The flow area is the area of the space between thevalve member 18 and the valve bore 14 perpendicular to the axis of the valve bore. Flow area is generally proportional to air flow. The variations in thickness of theperipheral edge 24 are produced by varying degrees of thickness reduction produced by the chamfer in theperipheral edge 24. The 0 degree position corresponds to thevalve member 18 being in a plane perpendicular to the axis of thevalve bore 14. - Figure 5 illustrates the value of the (chamfered)
peripheral edge 24 since it results in a gradual change in flow area produced by oscillation of thevalve member 18 in the region wherein the flow area is minimum. This improves control of the internal combustion engine at low loads since small oscillations of thevalve member 18, when it is in the positions wherein the flow area is minimum, do not substantially affect engine output. The (chamfered)peripheral edge 24 enables these control improvements while also allowing thevalve member 18 to be sufficiently thick for strength requirements. Thevalve member 18 is preferably 2 mm thick, with the chamfer producing a peripheral edge having a thickness of 0.5 mm. - Figure 5 also illustrates the capability of the valve assembly 10 to allow engine operation if the
motor 29 does not actuate thevalve member 18 since under such conditions, the valve member will be urged by thereturn means 26 to rotate the valve member to thenon-actuating position 20. When thevalve member 18 is in the non-actuating position 20 (that is, rotated approximately 5 degrees beyond the 0 degree position away from the maximum actuating position 22), the flow area is sufficient to allow sufficient air to flow to the internal combustion engine to allow it to produce sufficient output to idle or drive the vehicle. - Another advantage of the valve assembly 10 is that the
shaft boss 17 is away from thenon-actuating stop 21 when thevalve member 18 is in the position wherein the flow area is minimum which is typically the position of the valve member when the internal combustion engine is idling. This reduces the likelihood of theshaft boss 17 contacting thenon-actuating stop 21 when the internal combustion engine is idling. - The valve assembly 10 also includes a
shaft socket 30 connected to thevalve body 12 externally thereof. Theshaft socket 30 has an axis which intersects the centre of the valve bore 14 and which is perpendicular to the valve bore. Theshaft socket 30 has asocket opening 32 enabling one end of theshaft 16 to extend into the shaft socket. - A ball bearing having
outer race 36 and aninner race 38 is disposed in theshaft socket 30 so that the one end of theshaft 16 extends through theinner race 38. Theinner race 38 has an inner diameter which is sized to establish a clearance between theinner race 38 andshaft 16. Theouter race 36 has an outer diameter which is sized to establish a clearance between the outer race andshaft socket 30. - A
thrust collar 40 is secured to theshaft 16, by a press fit, to prevent displacement of theinner race 38 along the axis of the shaft away from the valve bore 14. Aresilient washer 42 is disposed between theouter race 36 andshaft socket 30 to resist displacement of the outer race toward the valve bore 14 along the axis of theshaft 16. - A bearing means 44 is provided between the
valve body 12 and the other end of theshaft 16. The bearing means 44 is adapted to urge the other end of theshaft 16 away from the valve bore 14 along the axis of the shaft to limit axial end float of the shaft. - The bearing means 44 comprises a ball bearing having an
outer race 46 and aninner race 48 with the other end of theshaft 16 extending through theinner race 48. Theinner race 48 has an inner diameter which is sized to establish a clearance between theinner race 48 andshaft 16. The bearing means 44 further comprises a bearingseat 50 connected to thevalve body 12 externally thereof. The bearingseat 50 has aseat opening 52 through which the other end of theshaft 16 extends. Theouter race 46 is disposed on the bearingseat 50 so that axial displacement of theouter race 46 along the shaft toward the valve bore 14 is obstructed. The bearing means 44 also includes athrust retainer 54 engaging theinner race 48 to urge theinner race 48 toward the valve bore 14 along the axis of theshaft 16. - Axial float of the
shaft 16 with respect to the valve bore 14 is limited by thethrust collar 40 and bearing means 44 which limit displacement of theshaft 16 inward toward the valve bore 14 along the axis of the shaft, with theresilient washer 42 maintaining a selected clearance between thevalve member 18 and valve bore 14. The urging of theshaft 16 by theresilient washer 42 and bearing means 44 also reduces axial play between the outer andinner races inner races resilient washer 42 can also deflect to maintain the selected clearance if temperature changes produce different thermal expansions of theshaft 16 andvalve body 12.
Claims (5)
1. A valve assembly (10) for regulating air flow to an internal combustion engine, the valve assembly comprising a valve body (12) having a valve bore (14) forming an induction passage for air flow to the internal combustion engine; a shaft (16) having opposite ends which are journalled for rotation in the valve body, the shaft extending across the valve bore; a valve member (18) of the flat butterfly type, the valve member being secured to the shaft for rotation between a non-actuating position (20) and a maximum actuating position (22) to control air flow through the valve bore, the valve member allowing the maximum air flow when in the maximum actuating position, the valve member being rotated through an angle in excess of 90 degrees from the maximum actuating position when in the non-actuating position; characterised in that the valve bore has a generally circular cross section; in that the valve member has a peripheral edge (24) which is chamfered; and by a return means (26) adapted to urge the valve member toward the non-actuating position when the valve member is rotated away from the non-actuating position.
2. A valve assembly as claimed in claim 1, comprising a shaft socket (30) connected to the valve body (12) externally thereof, the shaft socket having an axis intersecting the centre of the valve bore (14) and being perpendicular to the valve bore, the shaft socket having a shaft socket opening (32) enabling one end of the shaft (16) to extend into the shaft socket; a ball bearing having an outer race (36) and an inner race (38) disposed in the shaft socket so that the one end of the shaft extends through the inner race, the inner race having an inner diameter being sized to establish a clearance between the inner race and the shaft, the outer race having an outer diameter being sized to establish a clearance between the outer race and the shaft socket; a thrust collar (40) secured to the one end of the shaft to prevent displacement of the inner race along the axis of the shaft away from the valve bore; a resilient washer (42) disposed between the outer race and the shaft socket to resist displacement of the outer race toward the valve bore along the axis of the shaft; and a bearing means (44) provided between the valve body and the other end of the shaft, the bearing means being adapted to urge the other end of the shaft away from the valve bore along the axis of the shaft.
3. A valve assembly as claimed in claim 2, wherein the bearing means (44) comprises a ball bearing having an outer race (46) and an inner race (48), the other end of the shaft (16) extending through the inner race, the inner race of the bearing means having an inner diameter being sized to establish a clearance between the inner race and the shaft; a bearing seat (50) connected to the valve body (12) externally thereof, the bearing seat having a bearing seat opening (52) through which the other end of the shaft extends, the outer race of the bearing means being disposed on the bearing seat so that axial displacement of the outer race along the shaft toward the valve bore (14) is obstructed; and a thrust retainer (54) engaging the inner race of the bearing means to urge the inner race toward the valve bore along the axis of the shaft.
4. A valve assembly (10) comprising a valve body (12) having a valve bore (14) forming an induction passage for air flow to an internal combustion engine; a shaft (16) having opposite ends which are journalled for rotation in the valve body, the shaft extending across the valve bore; a valve member (18) of the flat butterfly type secured to the shaft for rotation to control air flow through the valve bore; a shaft socket (30) connected to the valve body externally thereof, the shaft socket having an axis intersecting the centre of the valve bore and being perpendicular to the valve bore, the shaft socket having a shaft socket opening (32) enabling one end of said shaft to extend into the shaft socket; a ball bearing having an outer race (36) and an inner race (38) disposed in the shaft socket so that the one end of the shaft extends through the inner race, the inner race having an inner diameter being sized to establish a clearance between the inner race and the shaft, the outer race having an outer diameter being sized to establish a clearance between the outer race and the shaft socket; a thrust collar (40) secured to the one end of the shaft to prevent displacement of the inner race along the axis of the shaft away from the valve bore; a resilient washer (42) disposed between the outer race and shaft socket to resist displacement of the outer race toward the valve bore along the axis of the shaft; and a bearing means (44) provided between the valve body and the other end of the shaft, the bearing means being adapted to urge the other end of the shaft away from the valve bore along the axis of said shaft.
5. A valve assembly as claimed in claim 4, wherein the bearing means (44) comprises a ball bearing having an outer race (46) and an inner race (48), the other end of the shaft (16) extending through the inner race, the inner race of the bearing means having an inner diameter being sized to establish a clearance between the inner race and the shaft; a bearing seat (50) connected to the valve body (12) externally thereof, the bearing seat having a bearing seat opening (52) through which the other end of the shaft extends, the outer race of the bearing means being disposed on the bearing seat so that axial displacement of the outer race along the shaft toward the valve bore (14) is obstructed; and a thrust retainer (54) engaging the inner race of the bearing means to urge the inner race toward the valve bore along the axis of the shaft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55031390A | 1990-07-12 | 1990-07-12 | |
US550313 | 1990-07-12 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93202270.0 Division-Into | 1991-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0466227A1 true EP0466227A1 (en) | 1992-01-15 |
Family
ID=24196644
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91201535A Withdrawn EP0466227A1 (en) | 1990-07-12 | 1991-06-18 | Valve assembly |
EP93202270A Withdrawn EP0574093A1 (en) | 1990-07-12 | 1991-06-18 | Valve assembly |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93202270A Withdrawn EP0574093A1 (en) | 1990-07-12 | 1991-06-18 | Valve assembly |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP0466227A1 (en) |
JP (1) | JPH04249678A (en) |
CA (1) | CA2044213A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0619421A2 (en) * | 1993-03-01 | 1994-10-12 | General Motors Corporation | Control system for a two-stroke engine |
US5687691A (en) * | 1995-03-23 | 1997-11-18 | Robert Bosch Gmbh | Throttle device and method for producing a throttle device |
EP0845585A1 (en) * | 1996-12-02 | 1998-06-03 | MAGNETI MARELLI S.p.A. | Throttle body with motorized throttle valve |
GB2339850A (en) * | 1998-07-20 | 2000-02-09 | Ford Motor Co | A throttle valve for an internal combustion engine with a limp home position |
EP0947681A3 (en) * | 1998-03-30 | 2000-05-31 | Ford Motor Company | Clamshell throttle valve assembly |
EP1375871A1 (en) * | 1999-11-01 | 2004-01-02 | Denso Corporation | Method for assembling a valve for intake air controller for internal combustion engine |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07198045A (en) * | 1994-01-10 | 1995-08-01 | Ngk Insulators Ltd | Butterfly valve for exhaust pipe and exhaust pipe structure using this butterfly valve |
US5522361A (en) * | 1995-09-07 | 1996-06-04 | Ford Motor Company | Throttle shaft seal for a throttle body |
US6070852A (en) * | 1999-01-29 | 2000-06-06 | Ford Motor Company | Electronic throttle control system |
US6095488A (en) * | 1999-01-29 | 2000-08-01 | Ford Global Technologies, Inc. | Electronic throttle control with adjustable default mechanism |
US6244565B1 (en) | 1999-01-29 | 2001-06-12 | Ford Global Technologies, Inc. | Throttle body shaft axial play control |
US6155533C1 (en) * | 1999-01-29 | 2002-07-30 | Visteon Global Tech Inc | Default mechanism for electronic throttle control system |
US6299545B1 (en) | 1999-05-03 | 2001-10-09 | Visteon Global Tech., Inc. | Rotating shaft assembly |
US6173939B1 (en) | 1999-11-10 | 2001-01-16 | Ford Global Technologies, Inc. | Electronic throttle control system with two-spring failsafe mechanism |
US6253732B1 (en) | 1999-11-11 | 2001-07-03 | Ford Global Technologies, Inc. | Electronic throttle return mechanism with a two-spring and two-lever default mechanism |
US6286481B1 (en) | 1999-11-11 | 2001-09-11 | Ford Global Technologies, Inc. | Electronic throttle return mechanism with a two-spring and one lever default mechanism |
US6267352B1 (en) | 1999-11-11 | 2001-07-31 | Ford Global Technologies, Inc. | Electronic throttle return mechanism with default and gear backlash control |
JP4285267B2 (en) | 2004-02-19 | 2009-06-24 | 株式会社デンソー | Exhaust gas recirculation device |
DE102016203517A1 (en) * | 2016-03-03 | 2017-09-07 | Mahle International Gmbh | Fresh air supply device for an internal combustion engine of a motor vehicle |
US9915352B2 (en) * | 2016-08-03 | 2018-03-13 | Scc, Inc. | Butterfly valve utilizing spring for consistent disk placement |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE837785C (en) * | 1943-05-15 | 1952-05-02 | Bayerische Motoren Werke Ag | Ball bearing seal for the throttle valve shafts of carburetors |
GB2067719A (en) * | 1979-12-29 | 1981-07-30 | Nissan Motor | A throttle mechanism |
US4318386A (en) * | 1979-09-20 | 1982-03-09 | Automotive Engine Associates | Vortex fuel air mixer |
EP0076612A1 (en) * | 1981-09-29 | 1983-04-13 | Merle Robert Showalter | Throttle valve |
DE3205160A1 (en) * | 1982-02-13 | 1983-08-25 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Throttle valve for an intake line of circular cross section of an internal combustion engine |
US4474150A (en) * | 1982-11-22 | 1984-10-02 | General Motors Corporation | Valve assembly |
US4860706A (en) * | 1987-09-14 | 1989-08-29 | Aisan Kogyo Kabushiki Kaisha | Throttle body |
US4938452A (en) * | 1988-12-10 | 1990-07-03 | Aisan Kogyo Kabushiki Kaisha | Air control device for internal combustion engine |
-
1991
- 1991-06-10 CA CA 2044213 patent/CA2044213A1/en not_active Abandoned
- 1991-06-18 EP EP91201535A patent/EP0466227A1/en not_active Withdrawn
- 1991-06-18 EP EP93202270A patent/EP0574093A1/en not_active Withdrawn
- 1991-07-11 JP JP17135091A patent/JPH04249678A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE837785C (en) * | 1943-05-15 | 1952-05-02 | Bayerische Motoren Werke Ag | Ball bearing seal for the throttle valve shafts of carburetors |
US4318386A (en) * | 1979-09-20 | 1982-03-09 | Automotive Engine Associates | Vortex fuel air mixer |
GB2067719A (en) * | 1979-12-29 | 1981-07-30 | Nissan Motor | A throttle mechanism |
EP0076612A1 (en) * | 1981-09-29 | 1983-04-13 | Merle Robert Showalter | Throttle valve |
DE3205160A1 (en) * | 1982-02-13 | 1983-08-25 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Throttle valve for an intake line of circular cross section of an internal combustion engine |
US4474150A (en) * | 1982-11-22 | 1984-10-02 | General Motors Corporation | Valve assembly |
US4860706A (en) * | 1987-09-14 | 1989-08-29 | Aisan Kogyo Kabushiki Kaisha | Throttle body |
US4938452A (en) * | 1988-12-10 | 1990-07-03 | Aisan Kogyo Kabushiki Kaisha | Air control device for internal combustion engine |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 11, no. 348 (M-642)14 November 1987 & JP-A-62 129 538 ( TOYOTA MOTOR CORP. ) 11 June 1987 * |
PATENT ABSTRACTS OF JAPAN vol. 13, no. 299 (M-847)11 July 1989 & JP-A-01 087 838 ( HITACHI LTD ) 31 March 1989 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0619421A2 (en) * | 1993-03-01 | 1994-10-12 | General Motors Corporation | Control system for a two-stroke engine |
EP0619421A3 (en) * | 1993-03-01 | 1995-05-10 | Gen Motors Corp | Control system for a two-stroke engine. |
US5687691A (en) * | 1995-03-23 | 1997-11-18 | Robert Bosch Gmbh | Throttle device and method for producing a throttle device |
EP0845585A1 (en) * | 1996-12-02 | 1998-06-03 | MAGNETI MARELLI S.p.A. | Throttle body with motorized throttle valve |
US5992377A (en) * | 1996-12-02 | 1999-11-30 | MAGNETI MARELLI S.p.A. | Motorized throttle body |
EP0947681A3 (en) * | 1998-03-30 | 2000-05-31 | Ford Motor Company | Clamshell throttle valve assembly |
GB2339850A (en) * | 1998-07-20 | 2000-02-09 | Ford Motor Co | A throttle valve for an internal combustion engine with a limp home position |
GB2339850B (en) * | 1998-07-20 | 2002-01-23 | Ford Motor Co | Throttle valve system |
EP1375871A1 (en) * | 1999-11-01 | 2004-01-02 | Denso Corporation | Method for assembling a valve for intake air controller for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP0574093A1 (en) | 1993-12-15 |
JPH04249678A (en) | 1992-09-04 |
CA2044213A1 (en) | 1992-01-13 |
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