JP6446380B2 - Throttle valve control device - Google Patents

Description

  The present invention relates to a throttle valve control device for an internal combustion engine, and more particularly to a throttle valve control device that regulates the rotational position of a throttle valve with a screw member provided in the throttle valve control device.

  As a throttle valve control device for an internal combustion engine, one described in JP 2012-247323 A (Patent Document 1) is known. The throttle valve control device described in the example of Patent Document 1 is a diesel engine motor-driven throttle valve control device. In this throttle valve control device, the throttle valve and the throttle gear are fixed to the throttle shaft, and the throttle gear is regulated by restricting the rotation of the throttle gear with the fully open stopper and the fully closed stopper set in the throttle valve control device. The operating range of the throttle valve that rotates in unison is defined. The state where the throttle gear is in contact with the fully open stopper is the mechanical fully open point of the throttle valve, and the state where the throttle gear is in contact with the fully closed stopper is the mechanical fully closed point of the throttle valve. At the time of throttle valve opening / closing control, the opening degree is controlled in a range between the mechanical fully open point and the mechanical fully closed point by supplying drive power to the motor. When the motor drive power is OFF, the throttle gear is biased to the fully open side by the torque of the return spring, and the throttle valve is held at the mechanical fully open point.

  Moreover, what was described in Unexamined-Japanese-Patent No. 2009-236119 (patent document 2) is known as a throttle valve control apparatus for internal combustion engines. The throttle valve control device described in the example of Patent Document 2 is a gasoline motor-driven throttle valve control device. Similar to the throttle valve control device of Patent Document 1, this throttle valve control device has a full open stopper and a full close stopper set in the throttle valve control device, so that the mechanical full open point and the mechanical full close point of the throttle valve are set. It is prescribed. This throttle valve control device is configured differently from the throttle valve control device of Patent Document 1, and includes a default lever, a default spring, and a stopper (hereinafter, default stopper) that restricts rotation of the default lever in the throttle valve control device. Is provided. The throttle valve control device disclosed in Patent Document 2 has a mechanism in which a return spring biases the default lever toward the fully closed side, and a default spring provided between the default lever and the throttle gear biases the throttle gear toward the fully open side. It has become. When the motor drive current is OFF, the default lever is urged to the fully closed side by the return spring torque and abuts against the default stopper, and the throttle gear is urged to the fully open side by the default spring torque. A stopper provided in the gear comes into contact with a stopper provided in the default lever. Thus, a mechanism (hereinafter, default mechanism) is configured in which the throttle valve is held at a neutral point (hereinafter, default opening) between the mechanical fully open point and the mechanical fully closed point. At the time of throttle valve opening / closing control, the opening degree is controlled in a range between the mechanical fully open point and the mechanical fully closed point by supplying drive power to the motor.

  In any of the throttle valve control devices described in Patent Documents 1 and 2, the protrusion formed integrally on the side wall of the throttle body has a function as a fully open stopper, and the fully closed stopper has a mechanical fully closed point ( An adjusting screw for adjusting the mechanically closed position) is used. An adjustment screw for adjusting a default point (default opening) is also used for a default stopper of the throttle valve control device described in Patent Document 2.

  Each adjusting screw makes it possible to adjust and set the required mechanical full-close point or default point in the manufacturing process of the throttle valve control device.

JP 2012-247323 A JP 2009-236119 A

  The mechanical full-close point determines the minimum opening area of the throttle valve control device composed of the throttle valve and the intake passage of the throttle body, and the minimum air flow (minimum leakage) of the throttle valve and the maximum downstream of the throttle valve. Determine the ability of negative pressure. In recent years, gasoline engines have been required to reduce the minimum air flow rate for the purpose of improving the fuel efficiency of internal combustion engines. Also for diesel engines, there is a demand for higher sealing of the throttle valve for the purpose of generating negative pressure downstream of the throttle valve. By increasing the position accuracy of the mechanical full-close point, the minimum air flow rate can be reduced and the tightness of the throttle valve can be increased, so the setting of the adjustment screw to the stopper meets the above requirement. .

  One of the purposes of the default mechanism of the motor-driven throttle valve control device shown in Patent Document 2 is to ensure the intake air amount and enable engine running when the throttle control system fails. Even in this default mechanism, there is a request for reducing variation in the default opening, or a request for reducing variation in the air flow rate at the default opening, and the setting of the adjustment screw to the stopper that adjusts the default opening meets the request. is there.

After adjusting the mechanical fully closed point or the default opening with this adjusting screw, it is necessary to fix the screw so that the position does not shift. The screw fixing means includes the following means.
Means (1) A screw is fixed with a lock nut.
Means (2) A self-tapping screw is used.
Means (3) An adhesive is applied to the screw and the part to be fitted with the screw.
However, the fixing means has the following problems.

[Problem about means (1)]
The position of the adjusting screw may be shifted due to the axial force when the lock nut is tightened, or the adjusting screw may be shifted due to the rotation with the lock nut. If the adjustment position deviates from the specified position, readjustment is performed. That is, the direct rate of the manufacturing process is reduced. In the case of a structure in which the gear housing chamber for housing the drive motor and the throttle gear and the outside of the body communicate with each other through the screw holes on the body side, the gear housing chamber cannot be sealed. When there is an airtight requirement, it is necessary to use an adhesive or a seal member together.

[Problem about means (2)]
Although the position does not move after adjustment, if the adjustment position is shifted due to self-tapping, readjustment is not possible. That is, the yield decreases. In the structure where the gear housing chamber for housing the drive motor and the throttle gear and the outside of the body communicate with each other through the screw holes on the body side, the gear housing chamber cannot be airtight because of the self-tapping. When there is an airtight requirement, it is necessary to use an adhesive or a seal member together.

[Problem about means (2)]
A step of curing the adhesive is required. There is a potential to shift the position of the adjusting screw before it is cured.

  The object of the present invention is to improve the position accuracy of the mechanical fully-closed point or the position accuracy of the default opening, to ensure productivity, and to ensure the airtightness of the screw hole portion of the adjusting screw. Another object of the present invention is to provide a throttle valve control device.

In order to achieve the above object, the throttle valve control device of the present invention comprises:
A housing provided with an intake passage for sucking air into the internal combustion engine, a throttle valve disposed inside the intake passage, an adjustment screw member for regulating a rotational position of the throttle valve, and the adjustment provided in the housing An adjustment screw member fixing portion having a female screw portion for screwing the screw member, and controlling the air flow rate by opening and closing the throttle valve, or adjusting the pressure downstream of the throttle valve,
The adjustment screw member includes a screw thread portion that engages with the female screw portion of the adjustment screw member fixing portion, and an adjustment screw member side pressure that is provided at a position different from the screw thread portion and is press-fitted into the adjustment screw member fixing portion. And an entrance.

  According to the present invention, the adjustment screw member can be fixed to the housing by the frictional force of the press-fit portion when adjusting the stopper restricting position. Since the adjusting screw member does not come off after adjusting the stopper restricting position, an improvement in the straightness rate is expected. In addition, sealing performance can be secured at the press-fitting site. In other words, according to the present invention, since the adjustment screw member can adjust at least one of the mechanical fully closed point and the default opening with high accuracy, the airtightness at the fully closed state or the air flow rate at the default opening is provided. There is no loss of accuracy. In addition, it is possible to provide a throttle valve control device that ensures the productivity of the throttle valve control device and ensures the airtightness of the screw hole portion of the adjustment screw member.

It is principle explanatory drawing which shows equivalently the operation | movement of the throttle valve control apparatus with a default mechanism used for a gasoline engine vehicle, and is a figure which shows the state in which a throttle opening is smaller than a default opening. It is principle explanatory drawing which shows equivalently the operation | movement of the throttle valve control apparatus with a default mechanism used for a gasoline engine vehicle, and is a figure which shows the state in which a throttle opening is equal to a default opening. It is principle explanatory drawing which shows equivalently the operation | movement of the throttle valve control apparatus with a default mechanism used for a gasoline engine vehicle, and is a figure which shows the state in which a throttle opening is larger than a default opening. It is a fragmentary sectional view of the throttle valve control device concerning the example of the present invention. It is an enlarged view of FIG. 2 which shows the site | part to which this invention is applied. It is an external appearance perspective view of the adjustment screw member shown in FIG. It is explanatory drawing explaining the constraints of this invention, and is an enlarged view of the same site | part as FIG. 1 is a perspective view of a throttle valve control device used in a gasoline engine vehicle according to an embodiment of the present invention. It is sectional drawing of the throttle valve control apparatus used for the gasoline engine vehicle based on the Example of this invention. It is the disassembled perspective view which removed the gear cover of the throttle valve control apparatus used for the gasoline engine vehicle based on the Example of this invention. It is a perspective view of the gear storage chamber of the throttle valve control apparatus used for the gasoline engine vehicle based on the Example of this invention.

  An embodiment in which the present invention is applied to a throttle valve control device will be described with reference to the drawings. The throttle valve control device according to the present invention controls the air flow rate by opening and closing the throttle valve, or adjusts the pressure downstream of the throttle valve.

  First, the principle of operation of the throttle valve control device with a default mechanism used in a gasoline engine vehicle will be described with reference to FIGS. 1A, 1B, 1C and 2. FIG. FIG. 1A is a principle explanatory view equivalently showing the operation of a throttle valve control device with a default mechanism used in a gasoline engine vehicle, and is a diagram showing a state in which the throttle opening is smaller than the default opening. FIG. 1B is a principle explanatory view equivalently showing the operation of a throttle valve control device with a default mechanism used in a gasoline engine vehicle, and is a diagram showing a state in which the throttle opening is equal to the default opening. FIG. 1C is a principle explanatory view equivalently showing the operation of a throttle valve control device with a default mechanism used in a gasoline engine vehicle, and shows a state where the throttle opening is larger than the default opening. FIG. 2 is a partial cross-sectional view of the throttle valve control device according to the embodiment of the present invention.

  1A to 1C, air flowing into the engine flows through a bore (intake passage) 1 and the flow rate thereof is adjusted according to the opening degree of a disk-like throttle valve 2. The throttle valve 2 is fixed to the throttle shaft 3 and rotates together with the throttle shaft 3 around the central axis 3A (see FIG. 7) of the throttle shaft 3. A throttle gear 13 that rotates about the central axis 3A of the throttle shaft 3 is fixed to the end of the throttle shaft 3, and the throttle gear 13 is rotated by the torque of the motor 20, whereby the throttle valve 2 is opened and closed. A rotor 18 forming a part of the throttle sensor 28 is fixed on the central axis 3A of the throttle shaft 3. The throttle sensor 28 shown in the present embodiment is a non-contact sensor, and detects the opening of the throttle valve 2 based on the phase of the throttle sensor 28 and the rotor 18. The controller of the throttle control system looks at the output signal of the throttle sensor 28, determines the driving power applied to the motor 20, and controls the opening and closing of the throttle valve 2.

  Here, the fully open stopper 6 </ b> D and the adjustment screw member 31 are stoppers that restrict the operating angle of the throttle valve 2, and the throttle gear 13 operates between the fully open stopper 6 </ b> D and the adjustment screw member 31. The adjusting screw member 31 is fixed to the throttle body (housing) 6 shown in FIG. The fully open stopper 6D is a stopper (full open stopper) that restricts the operating range of the throttle valve 2 on the fully open side. is there. The adjustment screw member 31 is a stopper (fully closed stopper) that restricts the operation range of the throttle valve 2 on the fully closed side, and the stopper portion (contact portion with the throttle gear 13) 31A of the adjustment screw member 31 and the throttle gear 13 The position where the stopper portion 13B abuts is the mechanical fully closed point.

  FIG. 1B shows a state where the drive power of the motor 20 is cut off and the opening of the throttle valve 2 (hereinafter referred to as the throttle opening) is located at the default point. The throttle opening at this time is the default opening.

FIG. 1A shows that the throttle opening is
The throttle opening is smaller than the default opening, and the opening torque of the default spring 7 fixed to the default lever 8 and the motor torque are balanced. In this state, the stopper portion 8A of the default lever 8 and the stopper portion 30C of the adjustment screw member 30 fixed to the throttle body 6 are in contact with each other, and the default lever 8 is in a state where rotation (movement) to the closed side is restricted. The rotation position is fixed. The throttle gear 13 is controlled in throttle opening between a default point (default opening) and a mechanical fully closed point.

FIG. 1C shows that the throttle opening is
The throttle opening is larger than the default opening, and the closing torque of the return spring 16 fixed to the spring hook 6E integrated with the throttle body 6 is balanced with the motor torque. In this state, the stopper 13 </ b> A of the throttle gear 13 and the stopper 8 </ b> B of the default lever 8 are in contact with each other, and the throttle gear 13 and the default lever 8 are integrated to resist the closing torque of the return spring 16 and the motor torque. Is driven to the open side.

In FIG. 1B, the default lever 8 rotates to the closed side by the closing torque (biasing force) of the return spring 16, the stopper portion 8 </ b> A and the stopper portion 30 </ b> C come into contact with each other, and the adjustment screw 30 restricts the rotation to the closing side. Has been.
The throttle gear 13 rotates to the open side by the open side torque (biasing force) of the default spring 7, the stopper portion 13 </ b> A and the stopper portion 8 </ b> B come into contact with each other, and the rotation to the open side is restricted by the default lever 8. For this reason, the throttle valve 2 that rotates in conjunction with the throttle gear 13 is in a state in which the rotation is restricted by the adjusting screw member 30. In other words, the default opening is determined by the adjusting screw member 30.

  Thus, the stopper for determining the mechanical fully closed point and the stopper for determining the default opening are the adjustment screw member 31 and the adjustment screw member 30, respectively. In the manufacturing process of the throttle valve control device, the adjustment screw member 31 and the adjustment screw member are adjusted. By adjusting the position of the screw member 30, the mechanical full-close point and the default opening can be adjusted.

  Next, an embodiment in which the present invention is applied to a throttle valve control device will be described with reference to FIGS.

  FIG. 2 is a partial cross-sectional view of the throttle valve control device according to the embodiment of the present invention. 2 is a partial cross-sectional view that is parallel to and includes the central axis 30E of the adjustment screw member 30 that defines the default opening, and shows an example in which the present invention is applied to the adjustment screw member 30. FIG.

  In FIG. 2, the stopper portion 30C (FIG. 3) of the default adjusting screw member 30 and the stopper portion 8A of the default lever 8 are in contact with each other, and the stopper portion 13A of the throttle gear 13 and the stopper portion 8B of the default lever 8 are in contact with each other. It is in the state of FIG.

  FIG. 3 is an enlarged view of FIG. 2 showing a portion to which the present invention is applied.

  As shown in FIG. 3, the adjustment screw member 30 is a portion that is an interference fit between a screw portion (thread portion) 30A constituting a male screw and an inner wall 6B of the throttle body 6 formed at a location different from the screw portion 30A. The throttle body 6 includes a female screw portion 6A that is screwed with the adjusting screw member 30 and an inner wall (an inner peripheral surface portion formed by a round hole) 6B.

  The press-fit portion (adjustment screw member side press-fit portion) 30B is configured by a spherical surface formed in an annular shape so as to surround the central axis 30E of the adjustment screw member 30, and the outer diameter (screw) of the screw portion (male screw portion) 30A The diameter is larger than the diameter of the top of the mountain. The female screw portion 6A and the inner wall 6B constitute a fixing portion (adjusting screw member fixing portion) for fixing the adjusting screw member 30. The inner wall 6B constitutes a fixed portion-side press-fit portion into which the adjustment screw member-side press-fit portion 30B is press-fitted, and is provided on the side where the adjustment screw member 30 is inserted into the female screw portion 6A. The inner wall 6B which is the fixed portion side press-fitting portion is formed to have a diameter larger than the diameter (valley diameter) of the valley of the female screw portion 6A. The adjustment screw member side press-fit portion 30B is press-fitted into the inner wall (fixed portion-side press-fit portion) 6B in a state where the screw portion 30A is screwed into the female screw portion 6A.

  In this embodiment, the throttle body (housing) 6 is made of an aluminum alloy material. In this case, the adjusting screw member 30 is made of a metal material, and the surface of the adjusting screw member 30 is coated with plating not containing nickel (plating with a material excluding nickel). Thereby, the contact state of the adjusting screw member 30 and the adjusting screw member fixing portions 6A and 6B can be kept good, and high airtightness can be secured.

  Alternatively, the throttle body (housing) 6 is made of an aluminum alloy material, the adjusting screw member 30 is made of a metal material, and the surface of the adjusting screw member 30 is coated by hot dip galvanizing. Hot dip galvanization has good compatibility with the aluminum alloy, can maintain a good contact state between the adjusting screw member 30 and the adjusting screw member fixing portions 6A and 6B, and can ensure high airtightness.

  Alternatively, the throttle body (housing) 6 is made of an aluminum alloy material, the adjusting screw member 30 is made of a metal material, and the surface of the adjusting screw member 30 is subjected to zinc flake rust prevention treatment as a coating. A coating having a large thickness can be obtained by the zinc flake rust prevention treatment. Thereby, an extra coating material is shaved at the time of press-fitting, and high airtightness can be secured by the remaining coating material.

  4 is an external perspective view of the adjusting screw member shown in FIG.

  FIG. 4 is a perspective view of the adjusting screw member 30. A tool is fitted into the end 30D of the adjusting screw member 30, and the adjusting screw member 30 is rotated with the tool so as to face the round hole 6B and the female screw 6A. Then, the adjustment screw member 30 is fed. At this time, a frictional force acts between the throttle body 6 and the adjusting screw member 30 by the interference fit between the press-fitting portion 30B of the adjusting screw member 30 and the inner wall portion 6B of the throttle body 6, and the adjusting screw member 30 is Fixed to. Thereby, the adjusting screw member 30 is firmly fixed to the throttle body 6 by the frictional force between the press-fit portion 30B and the inner wall portion 6B in addition to the fastening force by the screw.

  Further, the gear housing chamber 32 shown in FIG. 2 communicates with the outside through a hole (insertion hole for the adjusting screw member 30) 6C of the throttle body 6, but the gear fitting chamber 30B and the inner wall portion 6B are engaged with each other by the interference fit. The storage chamber 32 is shut off from the outside, and airtightness can be secured. The end 30D shown in FIG. 3 has a cross hole shape, but may have a slot shape or a hexalobular hole shape. The contour shape of the press-fit portion 30B viewed from the axial direction of the adjusting screw member 30 is preferably a circular shape. Further, the maximum outer shape of the press-fit portion 30B is larger than the outer shape of the screw portion 30A (the outer shape of the screw thread top portion). The contour shape of the inner wall 6B viewed from the axis (center axis) of the screw hole 6A is preferably circular. Further, before the press-fit portion 30B is press-fitted into the inner wall portion 6B, the maximum outer shape of the press-fit portion 30B is slightly larger than the inner diameter of the inner wall 6B.

  FIG. 5 is an explanatory diagram for explaining the constraint condition of the present invention, and is an enlarged view of the same portion as FIG. 3.

  FIG. 5 shows a state before the press-fitting portion 30B of the adjustment screw member 30 is press-fitted into the inner wall 6B of the throttle body 6. In this state, the screw portion 30A is formed to securely fit the screw portion. Of the screw thread is applied to the female thread 6A, the thread shear strength of one thread is T, the number of thread threads is N, the axial force F generated by the interference fit of the press-fit portion 30B, and the safety factor If n, at least the following relational expression must be satisfied.

T x N x n> F
By forming the inner wall portion 6B, the female screw 6A, and the adjusting screw member 30 so that the above relational expression is established, the press fitting portion 30B is press-fitted into the inner wall portion 6B in the process of screwing the adjusting screw member 30 into the female screw 6A. Can do. Thereby, it is not necessary to use a special apparatus for press-fitting, and productivity is improved.

  The valve control apparatus of the present embodiment will be described with reference to FIGS. 6, 7, 8, and 9.

  FIG. 6 is a perspective view of a throttle valve control device used in a gasoline engine vehicle according to an embodiment of the present invention. FIG. 7 is a cross-sectional view of a throttle valve control device used in a gasoline engine vehicle according to an embodiment of the present invention.

  The throttle body 6 is formed with a housing 20 </ b> A that accommodates the motor 20. The motor housing 20A is formed substantially parallel to the throttle shaft 3, and the motor 20 is inserted into the motor housing 20A substantially parallel to the throttle shaft 3, and the bracket 20B of the motor 20 is attached to the throttle body 6 (see FIGS. 8 and 9). ) Is fixed by screwing with a screw 21 (see FIGS. 8 and 9). A wave washer 25 is disposed at the end of the motor 20 to hold the motor 20.

  A throttle valve 2 is disposed in the bore 1 serving as an intake passage, and the throttle valve 2 is fixed to the throttle shaft 3 with screws 4 and 5. The throttle shaft 3 is supported by bearings 9 and 10, and the throttle valve 2 rotates about the central axis 3 </ b> A of the throttle shaft 3. The throttle shaft 3 is provided with a retainer 12, and the axial movement amount of the throttle shaft 3 is restricted by the retainer 12. The bearing 9 of the present embodiment has a structure in which a seal member is built in and the airtightness between the bore 1 and the gear storage chamber 32 is ensured, but the airtight means is not limited to this.

  A resin-made throttle gear 13 in which a metal plate 14 is insert-molded is fixed to the throttle shaft 3 by a nut 17 at the tip of the throttle shaft 3. The drive torque of the motor 20 is transmitted to the resin gear portion 15 of the throttle gear 13 via the output gear 22 and the intermediate gear 23. The intermediate gear 23 amplifies the motor torque. The gear shaft 24 functions as a bearing for the intermediate gear 23.

  A metal conductor rotor 18 is disposed on the central axis 3A of the throttle shaft 3, and the metal conductor rotor 18 is fixed to the tip of the throttle shaft 3 via a resin rotor member 18B and a metal inserter 18A. ing. The resin rotor member 18B is an integrally molded part in which the rotor 18 and the inserter 18A are insert-molded with the resin material, and the rotor 18 and the inserter 18A are insulated by the resin rotor member 18B. The inserter 18 </ b> A is a member that is press-fitted into the throttle shaft 3 and fixes the rotor 18 to the throttle shaft 3.

  The gear storage chamber 32 is formed by the throttle body 6 and the gear cover 26. The gear cover 26 incorporates the electrical wiring of the throttle sensor 28 fixed to the gear cover 26 and the electrical wiring of the motor 20. The coupler 26 </ b> A formed integrally with the gear cover 26 is connected to the harness on the vehicle body side. Connected. Further, a seal member 19 is disposed at an edge portion of the gear cover 26 that contacts the throttle body 6, and the seal member 19 enhances the airtightness of the gear storage chamber 32. The gear cover 26 is fixed to the throttle body 6 by a clip 27.

  The throttle sensor 28 functions as a position sensor that detects the rotational position of the throttle shaft with the rotor 18. In this throttle valve control device, the throttle control system driver looks at the output signal of the throttle sensor 28, and the motor 20 , The rotational position of the throttle valve 2 is controlled, and the flow rate of air flowing into the engine is controlled.

  FIG. 8 is an exploded perspective view of the throttle valve control device used for a gasoline engine vehicle according to an embodiment of the present invention with the gear cover removed. FIG. 9 is a perspective view of a gear storage chamber of a throttle valve control device used in a gasoline engine vehicle according to an embodiment of the present invention.

  The adjustment screw member 31 shown in the figure is a stopper that regulates the mechanical fully closed point of the throttle valve 2, and the adjustment screw member 31 adjusts the opening degree or the sealing degree of the mechanical fully closed point. The adjusting screw member 31 is fixed to the throttle body 6 by a lock nut 29, and is a fixing means that is also used in the throttle valve control device of Patent Document 2. An adjustment screw member 30 shown in FIG. 9 is a member shown in FIG. 4 and is a part to which the present invention is applied.

  In the present embodiment, the present invention is applied to the adjustment screw member 30, and the adjustment screw member 31 has the same configuration as the conventional configuration, but the adjustment screw member 31 has the same configuration as the adjustment screw member 30 shown in FIG. A female screw portion 6A and an inner wall portion 6B shown in FIG. 3 may be formed in the screwing portion 33 of the adjustment screw member 31. As a result, the fixing force of the adjusting screw member 31 can be increased, and there is no need to provide the lock nut 29.

  Alternatively, the screwing portion 33 of the adjustment screw member 31 may be configured in the same manner as in FIG. 3 so that the adjustment screw member 31 can be attached and adjusted from the outside. In this case, the adjusting screw member 31 having the same configuration as the adjusting screw member 30 shown in FIG. 4 and the screwing portion 33 having the same configuration as in FIG. The airtightness of the insertion hole part through which 31 is inserted can be improved.

  According to the present embodiment, the adjusting screw member can be fixed to the throttle body by the frictional force of the interference fitting portion when adjusting the stopper restricting position. For this reason, the adjustment screw member does not shift after adjusting the stopper regulating position, and an improvement in the straightness rate is expected. Further, the sealing performance can be secured at the press-fitting site of the adjusting screw member. That is, according to the present embodiment, the throttle valve control device that ensures the productivity of the throttle valve control device and the air tightness of the screw hole portion of the adjusting screw without impairing the air flow accuracy of the default opening. Can be provided.

  DESCRIPTION OF SYMBOLS 1 ... Bore, 2 ... Throttle valve, 3 ... Throttle shaft, 4, 5, 21 ... Screw, 6 ... Throttle body, 7 ... Default spring, 8 ... Default lever, 9, 10 ... Bearing, 11 ... Cap, 12 ... Retainer , 13 ... throttle gear, 14 ... metal plate, 15 ... resin gear, 16 ... return spring, 17 ... nut, 18 ... rotor, 19 ... seal member, 20 ... motor, 22 ... output gear, 23 ... intermediate gear , 24 ... gear shaft, 25 ... wave washer, 26 ... gear cover, 27 ... clip, 28 ... throttle sensor, 29 ... lock nut, 30 ... adjustment screw member, 31 ... adjustment screw member, 32 ... gear storage chamber.

Claims (5)

A housing provided with an intake passage for sucking air into the internal combustion engine, a throttle valve disposed inside the intake passage, an adjustment screw member for regulating a rotational position of the throttle valve, and the adjustment provided in the housing An adjustment screw member fixing portion having a female screw portion for screwing the screw member, and controlling the air flow rate by opening and closing the throttle valve, or adjusting the pressure downstream of the throttle valve,
The adjustment screw member includes a screw thread portion that engages with the female screw portion of the adjustment screw member fixing portion, and an adjustment screw member side pressure that is provided at a position different from the screw thread portion and is press-fitted into the adjustment screw member fixing portion. And a throttle valve control device. In the throttle valve control device according to claim 1,
The adjustment screw member fixing portion is provided on a side where the adjustment screw member is inserted with respect to the female screw portion, and includes a fixing portion side press-fitting portion formed larger in diameter than a valley diameter of the female screw portion,
The adjustment screw member side press-fitting part is formed to have a larger diameter than the outer diameter of the screw thread part,
2. The throttle valve control device according to claim 1, wherein the adjustment screw member side press-fitting portion is press-fitted into the fixing portion-side press-fitting portion in a state where the screw thread portion is screwed into the female screw portion. In the throttle valve control device according to claim 1 or 2,
The material of the housing is an aluminum alloy,
2. The throttle valve control device according to claim 1, wherein the adjustment screw member is a metal member, and the surface of the adjustment screw member is coated with a nickel-free plating. In the throttle valve control device according to claim 1 or 2,
The material of the housing is an aluminum alloy,
2. The throttle valve control device according to claim 1, wherein the adjusting screw member is a metal member, and a surface of the adjusting screw member is coated with hot dip galvanizing. In the throttle valve control device according to claim 1 or 2,
The material of the housing is an aluminum alloy,
The throttle valve control device according to claim 1, wherein the adjustment screw member is a metal member, and the adjustment screw member is subjected to a zinc flake rust prevention treatment as a surface coating.

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