WO2000063542A1 - Moteur thermique : dispositif de regulation du volume des gaz d'admission - Google Patents

Moteur thermique : dispositif de regulation du volume des gaz d'admission Download PDF

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Publication number
WO2000063542A1
WO2000063542A1 PCT/JP2000/002261 JP0002261W WO0063542A1 WO 2000063542 A1 WO2000063542 A1 WO 2000063542A1 JP 0002261 W JP0002261 W JP 0002261W WO 0063542 A1 WO0063542 A1 WO 0063542A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
housing
internal combustion
combustion engine
control device
Prior art date
Application number
PCT/JP2000/002261
Other languages
English (en)
Japanese (ja)
Inventor
Katsunari Takagi
Mikihiko Suzuki
Kensuke Imada
Takeshi Sugiyama
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Publication of WO2000063542A1 publication Critical patent/WO2000063542A1/fr

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
    • F02D9/1065—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

Definitions

  • the present invention relates to an intake amount control device that controls an intake air amount according to a traveling state of a vehicle.
  • FIG. 7 shows a configuration of a conventional intake air amount control device for an internal combustion engine.
  • 1 is a housing of a throttle body made of an aluminum alloy die-cast
  • 2 is an intake passage provided inside the housing 1
  • 3 is a throttle which is rotatably supported at both ends of the housing 1 and penetrates the intake passage 2 and restricts the air.
  • the throttle valve 4 is a valve shaft to which the valve 4 is attached. The throttle valve 4 rotates the intake passage 2 from the fully closed position to the fully open position by rotating the valve shaft 3 to control the amount of intake air.
  • a sensor 5 for detecting a rotation angle of the valve shaft 3 is arranged at one end of the valve shaft 3, and a speed reduction mechanism driven by a motor 6 is connected to the other end.
  • Reference numeral 7 denotes a connector for externally connecting the sensor 5.
  • the motor 6 includes a rotor 9 fixed to a drive shaft 8 and a stator 10 .
  • the drive shaft 8 is arranged on the same axis as the valve shaft 3 and has a gear 8 a at the tip, Driven by being coupled to the valve shaft 3 via a reduction mechanism composed of reduction gears 11, 13 and a reduction gear support 12.
  • the stator 10 is held by a synthetic resin housing 15 that integrally forms a connector 14 for external opening of the motor 6, and the motor housing 15 is connected to one end of the throttle body housing 1. It is fixed by screws and the slot poddy and the motor 6 are integrated. As described above, the sensor 5 is screwed to the end of the throttle body opposite to the motor mounting portion.
  • the motor 6 is controlled by a control device (not shown) and receives the feed pack by the sensor 5.
  • the throttle pod, the motor 6 and the sensor 5 are separately formed, and there is a limit to the reduction in size and weight in a configuration in which these are integrally assembled.
  • the housing 1 of the torque body also had the rigidity required for assembling the motor 6 and the like, and required high precision in the bore diameter, so it was necessary to use aluminum alloy die casting at the expense of weight.
  • the motor 6 and the sensor 5 are mounted on both sides of the valve shaft 3 in the axial direction, the axial dimension is increased, so that the assemblability to the internal combustion engine is poor, and the number of parts has to be increased. I didn't get it.
  • the present invention has been made in order to solve such problems, and it is possible to improve the mountability by reducing the weight and the axial dimension, to improve the controllability of the engine speed, and to improve the engagement of the reduction gear. It is another object of the present invention to provide an intake air amount control device for an internal combustion engine capable of reducing the number of parts and improving the assemblability accordingly. Disclosure of the invention
  • An intake air amount control device for an internal combustion engine includes: a housing made of a synthetic resin forming an intake passage of the internal combustion engine therein; a valve shaft rotatably provided in the intake passage of the housing; A throttle valve mounted on the housing to control the amount of air flowing through the intake passage, and insert molded into the housing,
  • the motor includes a motor that drives a valve shaft through a speed reduction mechanism, and a sensor that is provided near a joint between the valve shaft and the speed reduction mechanism and that detects a rotation angle of the valve shaft.
  • the synthetic resin housing is designed to anticipate changes in dimensions such as the roundness of the intake passage due to shrinkage during resin molding and cooling, and the mounting pitch of the motor drive shaft and valve shaft. Correct the mold dimensions, or eliminate roundness in the vicinity of the intake passage, which requires accuracy such as roundness and passage diameter, etc., and provide reinforcement ribs at a position away from the intake passage. It is manufactured by reducing the dimensional change due to shrinkage during resin cooling and ensuring accuracy.
  • the motor is constituted by a DC motor or a DC brushless motor.
  • the connector for external opening of the motor and the connector for external opening of the sensor are formed integrally with the housing.
  • the external outlet connector of the motor and the external outlet connector of the sensor are formed integrally with the cover covering the end face of the housing.
  • one of the external connector for the motor and the external connector for the sensor is formed integrally with the housing and the other with the cover.
  • the connector for externally connecting the motor and the connector for externally connecting the sensor are integrally integrated and molded.
  • FIG. 1 is a partial cross-sectional top view showing a structure of an intake air amount control device according to Embodiment 1 of the present invention.
  • FIG. 2 is a partial cross-sectional top view showing the structure of the intake air amount control device according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic sectional view showing a molding die without resin shrinkage compensation for molding the resin housing of the intake air amount control device.
  • FIG. 4 is a schematic sectional view showing the housing of the intake air amount control device formed by using the forming die of FIG.
  • FIG. 5 is a schematic cross-sectional view showing a molding die with resin shrinkage compensation for molding the resin housing of the intake air amount control device of the present invention.
  • FIG. 6 is a schematic sectional view showing the housing of the intake air amount control device formed by using the forming die of FIG.
  • FIG. 7 is a partial cross-sectional top view showing the structure of a conventional intake air amount control device.
  • FIG. 1 is a partial cross-sectional view of an intake air amount control device for an internal combustion engine according to a first embodiment of the present invention.
  • reference numeral 16 denotes a throttle body housing, in which an intake passage 2 for supplying intake air to the internal combustion engine 2 has an intake control section 17 having an inner diameter, and a motor storage section 18 for storing the motor 6 is the same. It is molded integrally with synthetic resin.
  • Numeral 3 is a valve shaft which is rotatably supported at both ends by a bearing 19 provided in an intake control section 17 of a housing 16, penetrates the intake passage 2 and has a throttle valve 4 attached thereto.
  • the valve 4 is configured to rotate the intake passage 2 from the fully closed position to the fully open position by rotating the valve shaft 3 to control the amount of intake air, and a motor shaft is provided at one end of the valve shaft 3. And a speed reduction mechanism driven by the motor.
  • the stator 10 of the motor 6 is attached to the motor housing 18 of the housing 16 by insert molding, and the rotor 9 having the drive shaft 8 has the drive shaft 8 of the motor housing 18 of the housing 16. Both ends are supported by bearings 20 and 21 provided on the shaft, are arranged in parallel with the valve shaft 3, and a gear 8 a is attached to the tip of the driving shaft 8.
  • 1 1 is a reduction gear that forms part of the reduction mechanism, and cooperates with other gears (not shown) to rotate the motor Slow down the rotation and drive the valve shaft 3.
  • Reference numeral 2 denotes a sensor, which is provided in the vicinity of a connection portion of the valve shaft 3 with the deceleration 4 and detects the rotation angle of the valve shaft 3 to control the driving position of the motor 6.
  • Reference numeral 23 denotes a connector integrally formed with the housing 16 and integrated into the sensor 22 and an external outlet of the motor 6, and 24 denotes a drive of the valve shaft 3 by the motor 6. It is a cover to cover.
  • a DC motor is used for motor 6, and a DC brushless motor is used for further reliability.
  • the vicinity of the intake passage 2 which requires accuracy such as roundness and passage diameter as resin shrinkage compensation, and motor 6 or motor 6 It is also effective to reduce the amount of resin by providing a gap G by eliminating the meat between the storage sections 18. Further, a reinforcing rib R is provided at a position distant from the suction passage 2, so that a change in dimension due to shrinkage during cooling of the resin can be reduced to ensure accuracy.
  • Fig. 3 is a schematic cross-sectional view of a molding die 35 for manufacturing the housing 16 of the intake air amount control device by resin molding
  • Fig. 4 uses the molding die 35 of Fig. 3.
  • the housing 36 of the intake air amount control device formed in this way is shown in a sectional view.
  • the molding die shown in Fig. 3 takes into account deformation due to resin shrinkage, such as the required change in roundness and dimensions due to the shrinkage of the housing material due to the synthetic resin due to the molding resin cooling.
  • the cross-sectional shape of the obtained intake passage 37 of the housing 36 is such that the inner diameter in the direction of the axis A1 of the valve shaft is D1 and the inner diameter in the direction perpendicular to the axis A1 is shorter than D1.
  • FIG. 5 is a schematic cross-sectional view of a molding die 40 with resin shrinkage compensation for manufacturing the housing 16 of the intake air amount control device by resin molding.
  • FIG. 6 shows the molding of FIG.
  • the housing 16 of the intake air amount control device formed by using the mold 40 is shown in a sectional view.
  • the molding die 40 shown in Fig. 5 is deformed due to shrinkage during molding resin cooling because the housing material is synthetic resin.
  • resin shrinkage compensation is performed by considering deformation due to resin shrinkage such as required roundness of inner diameter and change in dimensions.
  • the molding die 40 shown in FIG. 5 that is significantly different from the molding die 35 shown in FIG.
  • the hollow portion forming the intake passage 2 of the housing 16 is The cross section of the child 4 2 is not a perfect circle, and the diameter D 3 in the direction of the axis A 1 of the valve shaft is shorter than the diameter D 4 in the direction perpendicular to the axis A 1. Is formed in a distorted shape, and in particular, the axis A 3 of the cavity 43 forming the motor housing 18 has an intake passage 4 with respect to the axis A 1 of the valve shaft. For example, it is inclined in the direction approaching as it moves away from the center of 1.
  • the housing material is a synthetic resin
  • the housing is deformed by shrinkage during cooling of the molding resin, and the roundness and dimensions of the inner diameter are changed.
  • resin shrinkage compensation is performed as an elliptical shape (molded with a mold whose shape and dimensions are corrected to allow for deformation). It is also effective as a resin shrinkage compensation to reduce the amount of resin by eliminating the wall between the vicinity of the intake passage and the motor, which requires accuracy such as roundness and passage diameter, etc.
  • a reinforcing rib is provided at a position distant from the intake passage, so that a change in dimensions due to shrinkage during resin cooling can be reduced to ensure accuracy.
  • the cross-sectional shape of the intake passage 2 is a perfect circle in order to compensate for the above-mentioned resin shrinkage.
  • the evening storage section 18 also has no distortion, and its axis A 2 is parallel to the axis A 1 of the valve shaft.
  • the stator 10 of the motor 6 is integrated with the throttle body housing 16 by insert molding. ing. Therefore, the housing 16 which does not require rigidity for mounting the motor can be formed of synthetic resin.
  • the housing was molded with a mold whose shape and dimensions were corrected to allow for deformation, and by reducing the thickness near the intake passage and devising the position of the reinforcing ribs, the dimensions of the housing were refined. The degree has improved. The controllability of the engine speed can be improved, and the number of parts can be reduced and the weight can be reduced.
  • the drive shaft 8 of the motor 6 and the valve shaft 3 of the throttle body are arranged in parallel, and the sensor 22 is housed near the joint with the reduction mechanism of the valve shaft 3, so that the axial dimension can be shortened.
  • This is effective in obtaining an intake amount control device for an internal combustion engine with good mountability.
  • the mounting holes of the bearings 19 supporting the valve shaft 3 and the mounting holes of the bearings 20 and 21 supporting the drive shaft 8 of the motor 6 are formed at the same time. Since the hole between holes can be made with high precision by molding with the corrected mold, the gearing of the reduction mechanism is improved, the gear noise is reduced, and the rotational position accuracy of the throttle valve 4 is improved. Can be possible.
  • the connectors 23 and 23 may be separated from the connectors for the motor 6 and the sensor 22 and formed integrally with the housing 16 without being consolidated depending on the wiring.
  • FIG. 2 is a partial sectional view of an intake air amount control device for an internal combustion engine according to a second embodiment of the present invention.
  • This embodiment is different from the first embodiment in that a yoke 26 and a bracket Using a DC motor, which is a completed product with 27, and insert-molding it into the housing 16 as in the first embodiment, the housing 16 can be made of synthetic resin.
  • the connector 28 for the motor 25 and the connector 30 for the sensor 22 are integrally formed on the cover 28 that covers the drive unit of the valve shaft 3 by the motor 25. Are different.
  • a standard mode motor can be used without specializing the mode for driving the throttle valve, and the degree of freedom in the arrangement of the connectors is increased. Improved controllability of engine speed, reduced number of parts, reduced weight, improved mounting characteristics by shortening the axial dimension, reduced gear noise by increasing the precision of the mounting hole pitch of the valve shaft 3 and motor 25, An intake air amount control device for an internal combustion engine having an effect of improving the rotational position accuracy of the throttle valve 4 and the like can be obtained.
  • the motor and sensor connectors are separated into a housing and a cover, and are integrally formed therewith. You can also. Industrial applicability
  • the motor and the motor are insert-molded and integrated by the throttle body housing, the drive shaft of the motor and the valve shaft of the throttle body are arranged in parallel, and the sensor is connected to the valve. Since the housing is provided at the joint of the shaft and the speed reducer, the housing that does not require rigidity for assembling the motor is made of synthetic resin, so that the number of parts and the weight can be reduced.
  • the housing was molded using a mold whose shape and dimensions were corrected to allow for deformation during molding of the synthetic resin, or by eliminating the flesh for one hour near the intake passage and devising the position of reinforcing ribs.
  • the change in dimensions due to shrinkage during resin cooling can be reduced, and the roundness of the bore of the intake passage inside the intake control section, the dimensions and the dimensional accuracy of the reduction gear section are improved, and the desired engine idle speed is achieved.
  • Gear noise can be reduced, and seal failure due to improved cover mounting surface dimensional accuracy

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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)

Abstract

Cette invention concerne un dispositif de régulation du volume des gaz d'admission, à l'encombrement et au poids réduits, d'un montage très simple, comportant peu de pièces, qui permet de mieux réguler le régime moteur en fonction du rapport de démultiplication de la boîte de vitesse. Ce dispositif comprend un boîtier en résine synthétique définissant un passage interne pour les gaz d'admission pour le moteur thermique et comprenant les éléments constitutifs suivants : tige de soupape montée rotatif dans le passage des gaz d'admission ; papillon monté sur la tige de soupape et régulant le volume d'air dans le passage des gaz d'admission ; moteur rapporté dans le boîtier qui entraîne la tige de soupape via un mécanisme réducteur de vitesse ; et détecteur disposé près d'une pièce de liaison entre la tige de soupape et mécanisme de réduction de vitesse, qui détecte l'angle de rotation de ladite tige de soupape. L'arbre d'entraînement du moteur et la tige de soupape sont montés parallèles l'un par rapport à l'autre. On applique un système de compensation de contraction de résine au moule de formage du boîtier en résine synthétique afin d'éviter qu'une déformation due à la contraction ne se forme pendant le refroidissement de la résine.
PCT/JP2000/002261 1999-04-15 2000-04-07 Moteur thermique : dispositif de regulation du volume des gaz d'admission WO2000063542A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10806399 1999-04-15
JP11/108063 1999-04-15

Publications (1)

Publication Number Publication Date
WO2000063542A1 true WO2000063542A1 (fr) 2000-10-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110296679A (zh) * 2019-07-31 2019-10-01 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） 一种具备阀杆长期形变监测能力的装置及监测方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0218631Y2 (fr) * 1981-05-18 1990-05-24
JPH07158457A (ja) * 1993-12-10 1995-06-20 Mitsubishi Motors Corp 多気筒内燃エンジンの吸気制御装置
JPH07324636A (ja) * 1994-04-04 1995-12-12 Nippondenso Co Ltd スロットル弁制御装置
JPH08254129A (ja) * 1995-01-17 1996-10-01 Hitachi Ltd 内燃機関の絞り弁制御装置
JPH09287522A (ja) * 1996-04-22 1997-11-04 Hitachi Ltd 内燃機関の吸気装置
JPH10196461A (ja) * 1997-01-17 1998-07-28 Nippon Soken Inc オイル飛散防止システム
JPH10509230A (ja) * 1995-09-12 1998-09-08 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 可変比駆動装置を有する電気制御スロットル
JPH1113562A (ja) * 1997-06-24 1999-01-19 Toyota Motor Corp 樹脂製スロットルボディ
JPH1114419A (ja) * 1997-06-23 1999-01-22 Hitachi Ltd 内燃機関の吸気系ダクト
JPH11101165A (ja) * 1997-09-29 1999-04-13 Hitachi Chem Co Ltd 合成樹脂製インテークマニホールド

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0218631Y2 (fr) * 1981-05-18 1990-05-24
JPH07158457A (ja) * 1993-12-10 1995-06-20 Mitsubishi Motors Corp 多気筒内燃エンジンの吸気制御装置
JPH07324636A (ja) * 1994-04-04 1995-12-12 Nippondenso Co Ltd スロットル弁制御装置
JPH08254129A (ja) * 1995-01-17 1996-10-01 Hitachi Ltd 内燃機関の絞り弁制御装置
JPH10509230A (ja) * 1995-09-12 1998-09-08 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 可変比駆動装置を有する電気制御スロットル
JPH09287522A (ja) * 1996-04-22 1997-11-04 Hitachi Ltd 内燃機関の吸気装置
JPH10196461A (ja) * 1997-01-17 1998-07-28 Nippon Soken Inc オイル飛散防止システム
JPH1114419A (ja) * 1997-06-23 1999-01-22 Hitachi Ltd 内燃機関の吸気系ダクト
JPH1113562A (ja) * 1997-06-24 1999-01-19 Toyota Motor Corp 樹脂製スロットルボディ
JPH11101165A (ja) * 1997-09-29 1999-04-13 Hitachi Chem Co Ltd 合成樹脂製インテークマニホールド

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110296679A (zh) * 2019-07-31 2019-10-01 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） 一种具备阀杆长期形变监测能力的装置及监测方法

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