EP1674695B1 - Dispositif de commande électronique de papillon avec capteur de position - Google Patents
Dispositif de commande électronique de papillon avec capteur de position Download PDFInfo
- Publication number
- EP1674695B1 EP1674695B1 EP06075076A EP06075076A EP1674695B1 EP 1674695 B1 EP1674695 B1 EP 1674695B1 EP 06075076 A EP06075076 A EP 06075076A EP 06075076 A EP06075076 A EP 06075076A EP 1674695 B1 EP1674695 B1 EP 1674695B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- throttle
- sensor assembly
- sensor
- connector
- circuit board
- 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.)
- Expired - Fee Related
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/106—Detection of demand or actuation
-
- 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
- F02D9/105—Details of the valve housing having a throttle position sensor
-
- 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
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0294—Throttle control device with provisions for actuating electric or electronic sensors
Definitions
- the present invention generally relates to electronic throttle control systems and more particularly to electronic throttle control systems having non-contacting position sensors.
- At least one sensor is typically placed at the base of the accelerator pedal and its position is communicated to the engine controller.
- a throttle position sensor and an electronically controlled motor then regulate the throttle to maintain a precise engine speed through a feedback system between the throttle position sensor and the electronically controlled motor. Examples of an electronic throttle control systems are described in US-A-6,289,874 , DE-A-4 206 381 , EP-A-0 596 392 , FR-A-2 800 461 and US-A-6 067 958 .
- the various components of the throttle position sensor stator and connector assembly are mounted to the casting.
- the connector assembly is also connected to the motor.
- the throttle position sensor stator and the connector assembly move simultaneously during assembly and thermal expansion, thus possibly allowing one or both of them to become misaligned, which could potentially affect performance of the electronic throttle control system.
- an electronic throttle control system comprising: a housing; a bore formed within said housing; a throttle valve operatively associated with said bore, said throttle valve being rotatable in said bore for opening and closing said throttle valve; a sensor assembly operably associated with said throttle valve to sense the angular position of the throttle valve; a rotary actuator for effecting rotary movement of the throttle valve; and an electrical connector connected to said housing and having connections with said sensor assembly and the actuator; characterised in that the sensor assembly is a flat non-contact sensor assembly, and a flexible interconnect is connected between said flat non-contact sensor assembly and said connector and allows signals to be communicated between said connector and said sensor assembly, wherein the flexible interconnect holds said sensor assembly and said connector in position during assembly, while allowing said sensor assembly and said connector to move independently to accommodate thermal expansion.
- a motor is operably associated with the throttle shaft for rotating the throttle shaft in response to a control signal that is inputted from the electrical connector.
- the flexible interconnect is connected between the sensor assembly and the electrical connector and serves as a medium for the transmission of signals between the sensor assembly and the motor.
- FIG. 1 there is generally shown an electronic throttle control system 10, in accordance with the general teachings of the present invention.
- the system 10 generally includes a casting 12 that serves as a housing or support for the various components of the system.
- a throttle bore 14 having a throttle plate 15 rotatably disposed inside the throttle bore 14.
- a throttle shaft 16 is attached to and extends across the throttle plate 15.
- the throttle shaft 16 rotates the throttle plate 15 between the open and closed positions.
- the throttle shaft 16 is supported on both ends by a pair of bearings 18 to aid in the rotation of the throttle plate 15 and throttle shaft 16.
- a gear train 20 envelops the throttle shaft for effecting movement of the throttle shaft 16.
- a spring system 22 is also provided at one end of the throttle shaft 16 as part of a fail-safe system (not shown).
- a substantially U-shaped sensor rotor 24 is fastened thereto.
- the rotor 24 is shown as being substantially U-shaped, in accordance with the present invention the rotor 24 is configured as a flat member.
- the rotor 24 is preferably nested in close proximity to sensor stator 26 and together the two generally form a sensor assembly 27.
- the rotor 24 is capable of rotating about the stator 26.
- the stator 26 is shown as being substantially U-shaped, in accordance the present invention the stator 26 is configured as a flat member.
- the axial position of the rotor 24 is preferably maintained by controlling the axial position at which it is attached to the throttle shaft 16; however, this position can be fixed or adjustable.
- the stator 26 is fastened to a printed circuit board 32, which is preferably fastened to the housing 12.
- Axial position control is preferably maintained by attaching the printed circuit board 32 to a controlled fixed surface such as the casting 12.
- Tight radial position control is preferably maintained between the rotor 24 and the stator 26 through the assembly process or through dimensional control of the printed circuit board 32 and a fixed surface such as the casting 12.
- This tight radial positioning is preferably maintained by carrying out an alignment method which may incorporate an alignment means.
- One method of alignment involves the use of pre-molded slots (depicted in Fig. 2 ) in the casting so each of the individual components can be aligned by sliding into the slots.
- a second method of alignment (depicted in Figs.
- the printed circuit board 32 and the stator 26 are preferably fastened in place by one or more fasteners (not shown) that are inserted through one or more apertures 34 formed on the surface of the casting 12 adjacent to the printed circuit board 32.
- Fastened to the printed circuit board 32 is a preferably flexible interconnect 36 that electrically connects the printed circuit board 32 to a connector 38.
- the flexible interconnect 36 reduces stress on the printed circuit board 32 and allows the printed circuit board 32 to be positioned separately from the connector 38.
- the connector is preferably fastened to the casting 12.
- the connector 38 is in turn electrically connected to a motor 40 which is preferably fastened to the casting 12.
- motors may be within the scope of this invention.
- the motor may be a brush motor, a DC motor, a brushless motor, a solenoid, pneumatic or a stepper motor. Any type of actuator that can facilitate the rotation of the shaft 16 may be implemented.
- Fig. 2 is a cross-sectional side plan view taken about section line X-X of Fig. 1 , however, this particular view also depicts a pre-molded casting that serves as one method of alignment during assembly of the electronic throttle control system.
- the electronic throttle control system 10 has a casting or housing 12 which houses all of the individual components of the system.
- the printed circuit board 32 and the electrical connector 38 are each independently mountable to the casting 12. This is accomplished through the use of a flexible interconnect which connects the printed circuit board 32 and the electrical connector 38.
- the flexible interconnect allows signals to be communicated between the electrical connector 38 and the sensor assembly 27 and is capable of bending or flexing to accommodate for a range of varying spatial distribution between the printed circuit board 32 and the electrical connector 38.
- the flexible interconnect 36 allows the printed circuit board 32, which is fastened to the stator (not shown), to be independently and perfectly aligned with the rotor and the valve shaft, while still allowing for the electrical connector 38 to be independently aligned and connected to the casting.
- this feature provides an advantage during assembly of the electronic throttle control system 10 it also compensates for thermal expansion among the various components of the system 10. For example, thermal expansion can occur unevenly among each of the components of the system 10. It is possible for thermal expansion to occur in the printed circuit board region 32 before it occurs at the electrical connector 38. While actual movement caused by thermal expansion is relatively small, it can cause misalignment or changes in the air gap space between the stator and rotor thus affecting the performance of the sensor assembly 27.
- Fig. 2 illustrates one particular method of aligning the electrical connector 38 and the printed circuit board 32.
- the casting 12 of this particular embodiment has pre-molded alignment depressions.
- the printed circuit board 32 and sensor assembly 27 can be aligned by placing the printed circuit board 32 within a board depression 33. Once the printed circuit board 32 is aligned it can be fastened to the housing 12 with fasteners 34.
- the electrical connector 38 can then be aligned by placing the electrical connector 38 within a connector depression 37. Once the electrical connector 38 is aligned it can then be fastened to the housing 12 with fasteners 39.
- Fig. 3 is a cross-sectional plan view of the sensor assembly 27 taken about section line 3-3 on Fig. 1 .
- the illustrated sensor assembly 27, which is not in accordance with the invention, consists of a sensor rotor 24, a sensor stator 26, a magnet layer 28 and an air gap 30.
- the sensor stator 26 is disposed inside of a nested region of the sensor rotor 24.
- Disposed on the surface of the sensor rotor 24 is a magnet layer 28.
- the sensor rotor 24 and sensor stator 26 are positioned so they are not touching and there will be an air gap 30 between the surface of the sensor stator 26 and the magnet 28 layer on the surface of the sensor rotor 24.
- a sensor assembly of this type is generally referred to as a non-contact sensor, such as a Hall Effect sensor.
- a non-contact sensor such as a Hall Effect sensor.
- Examples of prior art Hall Effect sensors are known in the art and can be found with reference to U.S. Patent No. 5,528,139 to Oudet et al., U.S. Patent No. 5,532,585 to Oudet et al., and U.S. Patent No. 5,789,917 to Oudet et al.
- the sensor assembly is a flat non-contact sensor assembly.
- Fig. 4 depicts a perspective view of the throttle control system taken about section line X-X in Fig. 1 , wherein this particular view depicts the use of an alignment tool 42 that is used to align the sensor assembly 27 during assembly of the throttle control system 10.
- the printed circuit board 32 has a number of slots 44 on its surface which defined the perimeter of the sensor stator 26.
- the slots 44 allow the insertion of an alignment tool 42 which is used to engage the printed circuit board 32 and the sensor stator 26 so that the printed circuit board 32 and the sensor stator 26 can be properly aligned in relation to the sensor rotor (not shown) during assembly.
- the printed circuit board 32 can be fastened to the casting 12 with fasteners 34. Once the printed circuit board 32 is secure the alignment tool 42 can be disengaged since the sensor stator 26 is now in proper alignment. After securing the printed circuit board 32 and the sensor assembly (not shown) the electrical connector 38 can be aligned and fastened 39 to the casting 12.
- the flexible interconnect 36 allows electrical connector 38 and the printed circuit board 32 to be assembled independent of each other so that the sensor stator 26 does not become misaligned during completion of assembly.
- the alignment tool 42 in this embodiment has six fingers 46 that align with the slots 44.
- the fingers 46 on the alignment tool 42 are flexible and are capable of bending to grasp onto the sensor stator 26. Once the printed circuit board 32 is fastened to the casting 12, the alignment tool 42 can be easily removed by simply pulling the alignment tool 42 away from the printed circuit board 32.
- Fig. 4a is a cross-sectional view taken about section line 4a-4a of Fig. 5 .
- the sensor stator 26 is connected to the printed circuit board 32 and the alignment tool 42 is used to position the sensor stator 26 in the nested region of the rotor 24. Once the printed circuit board 32 is fastened to the casting 12, alignment of the sensor stator 26 and the sensor rotor 24 will be maintained and the alignment tool 42 may be removed.
- Fig. 4b is a cross-sectional view of the sensor assembly being aligned using the alignment tool.
- the rotor alignment tool 42 can have various configurations.
- the stator 26 can be positioned at the tip of the rotor alignment tool 42 and can be temporarily engaged to the tip of the rotor alignment tool 42 by pressing the stator 26 onto the tool.
- the tool 42 can then be used to align the stator 26 and the rotor 24 so that a proper air gap 30 is achieved.
- the tips of the tool 42 help aid in forming the proper air gap by holding the stator in place during fastening.
- Fig. 5 depicts a perspective view taken about section line X-X of Fig. 1 , however, this particular embodiment incorporates the use of alignment holes 52 that are used as an alternate to the alignment slots.
- individual tapered pins 50 are inserted through the alignment holes 52 in a manner similar to the alignment tool 42 depicted in Fig. 5 .
- the tapered pins 50 are used to align the sensor stator 26 with respect to the magnets 28 of the rotor 24 so that a properly spaced air gap 30 is created during assembly.
- the tapered pins 50 are then removed.
- the pins 50 are tapered to prevent over-insertion and ease the insertion and retraction of the pins 50, however, it is possible to use pins 50 of virtually any type of configuration.
- the electrical connector 38 can also independently be aligned and fastened to the casting 12.
- the flexible interconnect 36 plays an important role by allowing the electrical connector 38 and the printed circuit board 32 to each be aligned and fastened to the casting 12 independently of each other. This eliminates the possibility of misalignments of the sensor assembly 27 when the electrical connector 38 is connected to the casting. Additionally, as stated earlier the use of the flexible interconnect 36 also prevents misalignment of the sensor assembly 27 during thermal expansion which may occur during normal operation of the throttle control system 10.
- the present invention functions by employing feedback between the various sensor systems (e.g., sensor rotor/sensor stator) and the various control assemblies (e.g., the motor) in order to properly position the throttle plate so as to achieve optimal performance of the electronic throttle control system.
- the present invention can be employed in any type of rotary actuator employing a position sensor.
- Fig. 6 depicts a schematic view of the operation of the throttle control system.
- the throttle control system 10 operates using an external electrical control unit (ECU).
- the ECU is a logic circuit that receives a user input signal 64 and a throttle position signal 62 and generates a control signal 66 to the motor via the electrical connector.
- the electrical connector of the throttle control system 10 also receives power 60 from a power source.
- the power is distributed through the electrical connector to the motor and the sensor stator via the flexible interconnect and sensor stator.
- the user input signal 64 is a value that indicates the user's desired throttle position.
- the user input signal 64 can be generated from a user input such as, an accelerator pedal (not shown).
- the throttle position signal 62 is generated by the sensor stator via the printed circuit board, the flexible interconnect and the electrical connector.
- the throttle position signal 62 is a value that indicates the present angular position of the throttle plate (not shown).
- the throttle position signal is an analog position signal. However, it is in the scope of this invention to have a throttle position signal that is digital.
- the ECU analyzes the values of the user input signal 64 and the throttle position signal 62 to determine if the throttle position signal 62 matches the user input signal 64. If the two signal values do not match then the ECU will generate a control signal 66 to the motor which is inputed to the throttle control system 10 via the electrical connector. The motor receives the control signal 66 and actuates the throttle body so that actual angular position of the throttle valve matches the desired angular position of the user which will be confirmed by the ECU when the throttle position signal 62 and the user input signal 64 both match.
- the printed circuit board serves as a housing for the sensor stator 26.
- the sensor stator generates an analog to position signal that travels through wiring (not shown) on the printed circuit board.
- the position signal then exits the printed circuit board through the flexible interconnect and travels to the ECU via the electrical connector.
- the printed circuit board preferably has no logic, however, it may contain resistors, capacitors, and amplifiers necessary for the position signal. However, it should be understood that it is within the scope of this invention to incorporate a printed circuit board that has logic functions.
- the flexible interconnect In addition to carrying the position signal, the flexible interconnect also supplies power from the electrical connecter to the sensor stator via the printed circuit board. In an embodiment where the printed circuit board has Logic functions it should also be understood that the flexible interconnect would also be capable of carrying a user input signal to the motor.
- the flexible interconnect can have many physical forms. For example, in the present embodiment the flexible interconnect may be bare metal wires, however, it is possible to use a ribbon wire or plastic coated wires in embodiments where the flexible interconnect will need to insulated.
- the preferred embodiment of the invention has an external ECU.
- the ECU receives a position signal from the sensor stator. This signal indicates the angular position of the throttle plate.
- the ECU also receives a user input signal that indicates the user's desired angle of the throttle plate.
- the ECU takes the values of the user input signal and the position signal and generates a control signal based on the values.
- the control signal is sent to the motor and causes the motor to rotate the gear train, the throttle shaft and throttle plate (see Figs. 1-2 ) so the throttle plate reaches the angle desired by the user.
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- 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)
Claims (3)
- Système (10) de commande de papillon, comprenant:un boîtier (12) ;un alésage (14) formé dans ledit boîtier (12);un papillon associé fonctionnellement audit alésage (14), ledit papillon pouvant tourner dans ledit alésage pour l'ouverture et la fermeture dudit papillon ;un ensemble de capteur (27) associé fonctionnellement audit papillon pour détecter la position angulaire du papillon ;un actionneur rotatif (40) pour causer le mouvement de rotation du papillon ; etun connecteur électrique (38) connecté audit boîtier (12) et présentant des connexions audit ensemble de capteur et à l'actionneur, caractérisé en ce que le capteur est un ensemble de capteur plat sans contact, et un moyen d'interconnexion flexible (36) est connecté entre ledit ensemble de capteur plat sans contact (27) et ledit connecteur (38) et permet de communiquer des signaux entre ledit connecteur (38) et ledit ensemble de capteur (27), le moyen d'interconnexion flexible (36) maintenant en place ledit ensemble de capteur (27) et ledit connecteur (38) au cours de l'assemblage, tout en permettant audit ensemble de capteur (27) et audit connecteur (38) de se déplacer indépendamment pour autoriser une dilatation thermique.
- Système (10) de commande de papillon selon la revendication 1, dans lequel ledit moyen d'interconnexion flexible (36) est capable de se courber ou de fléchir pour autoriser une plage de répartitions spatiales variables entre ledit ensemble de capteur (27) et ledit connecteur (38).
- Système (10) de commande de papillon selon la revendication 1 ou 2, dans lequel le papillon comprend une plaque de papillon (15) disposée dans ledit alésage (14) sur une tige de papillon (16), l'actionneur rotatif comprend un moteur (40) accouplé à ladite tige de papillon pour faire tourner ladite tige de papillon (16), et le connecteur (38) est connecté au moteur (40).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36203202P | 2002-03-06 | 2002-03-06 | |
EP03251307A EP1342896B1 (fr) | 2002-03-06 | 2003-03-05 | Dispositif de commande électronique de papillon avec capteur de position sans contact |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03251307A Division EP1342896B1 (fr) | 2002-03-06 | 2003-03-05 | Dispositif de commande électronique de papillon avec capteur de position sans contact |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1674695A2 EP1674695A2 (fr) | 2006-06-28 |
EP1674695A3 EP1674695A3 (fr) | 2006-09-06 |
EP1674695B1 true EP1674695B1 (fr) | 2008-08-06 |
Family
ID=36406479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06075076A Expired - Fee Related EP1674695B1 (fr) | 2002-03-06 | 2003-03-05 | Dispositif de commande électronique de papillon avec capteur de position |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1674695B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012221697B4 (de) * | 2012-11-28 | 2024-07-18 | Robert Bosch Gmbh | Motorsteuereinheit |
JP6354724B2 (ja) * | 2015-10-02 | 2018-07-11 | 株式会社デンソー | 吸気制御装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH662649A5 (de) * | 1983-12-15 | 1987-10-15 | Maag Zahnraeder & Maschinen Ag | Zahnmesstaster. |
US5094212A (en) * | 1989-03-28 | 1992-03-10 | Honda Giken Kogyo Kabushiki Kaisha | Throttle body assembly |
US5270645A (en) * | 1991-08-30 | 1993-12-14 | Nartron Corporation | Linear-output, temperature-stable rotational sensor including magnetic field responsive device disposed within a cavity of a flux concentrator |
DE4206381A1 (de) * | 1992-02-29 | 1993-09-02 | Bosch Gmbh Robert | Stellvorrichtung |
IT1259443B (it) * | 1992-10-29 | 1996-03-18 | Weber Srl | Dispositivo di alimentazione aria per un motore a combustione interna. |
JP3404254B2 (ja) * | 1997-05-07 | 2003-05-06 | 株式会社日立製作所 | エンジンのスロットル装置 |
DE29901516U1 (de) * | 1999-01-29 | 1999-04-22 | Ab Elektronik Gmbh, 59368 Werne | Steckbarer Drosselklappendrehwinkelsensor |
EP1167724B1 (fr) * | 1999-03-29 | 2004-05-26 | Hitachi, Ltd. | Dispositif d'etranglement commande de maniere electronique |
JP2001289610A (ja) * | 1999-11-01 | 2001-10-19 | Denso Corp | 回転角度検出装置 |
-
2003
- 2003-03-05 EP EP06075076A patent/EP1674695B1/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1674695A3 (fr) | 2006-09-06 |
EP1674695A2 (fr) | 2006-06-28 |
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