JP4751345B2 - Intake control device for vehicle engine - Google Patents

Description

  The present invention relates to an intake control device for a vehicle engine mounted on a motorcycle or a buggy that mainly travels on a rough road, particularly an externally exposed engine, and in particular, a transmission chamber is formed on one side of a throttle body of the engine. An electric motor is attached to the inner wall or the outer wall of the transmission chamber, and a transmission device that opens and closes the throttle valve in the intake passage of the throttle body in response to the output of the electric motor is accommodated in the transmission chamber, and the side wall of the transmission chamber Further, the present invention relates to an improvement in the provision of a breathing path that allows the transmission chamber to communicate with the atmosphere so that the transmission chamber can breathe in accordance with temperature changes therein.

Such a valve device is already known as disclosed in Patent Document 1 below.
Japanese Patent Laid-Open No. 3-50349

  In such an intake control apparatus for a vehicle engine, the ability of the transmission chamber to breathe in accordance with a change in temperature inside it is effective in preventing condensation within the transmission chamber.

  By the way, in the conventional intake control device for a vehicle engine, the breathing path is formed in a maze shape so that even if splashed water from the road surface enters the breathing path, the water does not reach the transmission chamber. . However, in a breathing path having such a maze structure, when a motorcycle or buggy or the like having an externally exposed engine travels on a bad road, there is a possibility that muddy water or the like scattered vigorously passes through the breathing path.

  The present invention has been made in view of such circumstances, and it is possible to prevent the invasion of a powerful muddy water or the like into the transmission chamber while ensuring the respiratory action of the transmission chamber. An object of the present invention is to provide an intake control device.

In order to achieve the above object, the present invention forms a transmission chamber in one side portion of a throttle body of an engine mounted on a vehicle, attaches an electric motor to the inner wall or outer wall of the transmission chamber, and outputs the electric motor. And a transmission device that opens and closes a throttle valve in the intake passage of the throttle body is housed in the transmission chamber, and a side wall of the transmission chamber is provided with a breathing path that communicates the transmission chamber to the atmosphere. In the inhalation control device, a bottomed cylindrical filter chamber having one end open to the outside is formed on the side wall , and a waterproof and moisture permeable filter member is attached to the bottom surface of the filter chamber , and the respiratory path is connected to the filter chamber. A first air passage communicating with the transmission chamber and a notched second air passage provided on the peripheral wall of the filter chamber to open the filter chamber to the atmosphere, and at the outer end of the filter chamber The mounting holes of the air release continuous through the part and forming the side wall, on the mounting hole, and mounted in contact with the lid on the stepped portion by the lid an opening of the filter chamber, the first The first feature is that the two airways are covered without being closed .

According to the present invention, in addition to the first feature, the transmission chamber is defined between the throttle body and a cover joined to a side surface of the throttle body via a seal member. shall be the second, characterized in that the side walls.

The present invention, in addition to the first or second feature, the outer end of the second air passage, the third feature that it has opposed the outward bulging portion formed on the side wall outer surface .

  According to the first aspect of the present invention, when the temperature of the transmission chamber changes due to heating from the engine or heat generation and heat dissipation of the electric motor and transmission device, the transmission chamber breathes through the respiratory path, the filter chamber, and the filter member. As a result, the transmission chamber is ventilated, so that condensation can be prevented from occurring on the inner wall of the transmission chamber, the transmission device, and the like. Moreover, since the filter member is waterproof and moisture-permeable, it does not interfere with the breathing, and when the vehicle travels on a rough road, even if muddy water scattered by the wheels enters the filter chamber, it enters the transmission chamber side. Can be blocked by the filter member. Moreover, a cover body can protect a filter member from flying stones etc., and can contribute to the durability improvement of a filter member.

According to the second aspect of the present invention, the breathing path and the filter chamber are formed in the cover joined to the throttle body and the filter member is attached. Therefore, the processing of the breathing path and the filter chamber, and the filter member are performed. the attachment, Ru can be easily performed without being obstructed by the throttle body.

According to the third feature of the present invention, it is possible to prevent entry of muddy water or the like into the second air passage as much as possible by using the outward bulging portion.

  Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

  1 is a cross-sectional front view of a throttle body of a motorcycle engine equipped with a throttle valve control device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. 3 is a cross-sectional view taken along line -3, FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1, FIG. 5 is an enlarged view of part 5 of FIG.

  1 and 2, a throttle body 1 connected to an intake system of an externally exposed engine mounted on a motorcycle for driving on rough roads has an intake passage 2 connected to the intake port of the engine. A throttle valve 3 that opens and closes the intake passage 2 is attached to the throttle body 1. The throttle valve 3 includes a valve shaft 3a that is rotatably supported on the left and right side walls of the throttle body 1 via ball bearings 4 and 5 across the intake passage 2, and the valve shaft 3a in the intake passage 2. It consists of a valve plate 3b to be attached. A fuel injection valve 8 that injects fuel through the intake passage 2 toward the intake port of the engine is mounted on the mounting boss 7 formed on the upper wall of the throttle body 1.

  A first throttle lever 10 is fixed to the right end portion of the valve shaft 3a protruding out of the ball bearing 5, and a second throttle lever 11 is fixed to the left end portion of the valve shaft 3a protruding out of the ball bearing 4. Between each of these first and second throttle levers 10 and 11 and the throttle body 1, a torsion coil spring that urges the first and second throttle levers 10 and 11 in the opening direction of the throttle valve 3, respectively. The first and second opening springs 12 and 13 made of are contracted.

  A first housing 15 that houses the first throttle lever 10 and the first opening spring 12 is integrally formed at the right end portion of the throttle body 1, and a cover 16 is joined to the open end surface thereof. A drum shaft 17 arranged coaxially with the valve shaft 3 a is rotatably supported on the cover via a ball bearing 18, and an accelerator drum 19 facing the first throttle lever 10 is fixed to the drum shaft 17. The The accelerator drum 19 rotates between a predetermined fully-closed operation position A and a fully-open operation position B. The fully-closed operation position A and the fully-open operation position B are stopper arms protruding from the outer periphery of the accelerator drum 19. 30 are respectively defined by abutting against a fully-closed operation stopper bolt 31 and a fully-open operation stopper bolt 32 screwed to the cover 16 in an adjustable manner.

  Between the accelerator drum 19 and the cover 16, a closing spring 29 made of a torsion coil spring for biasing the accelerator drum 19 toward the fully closing operation position A is provided in a compressed manner. At this time, the set load of the closing spring 29 is set larger than the total set load of the first and second opening springs 12 and 13.

  The accelerator drum 19 is connected to a valve opening wire 21 and a valve closing wire 22 that are alternately pulled by an accelerator grip 20 attached to a steering handle of a motorcycle. These wires 21 and 22 are connected to the accelerator grip. The operating force transmitting means 23 is configured to forcibly transmit the operating force in any direction of opening and closing of the valve 20 to the accelerator drum 19.

  The accelerator drum 19 is provided with a large notch 25 on its outer periphery. An inner end surface 26 of the notch 25 facing the closing direction of the throttle valve 3 is used as a stopper receiving surface, and a stopper claw 27 facing the stopper receiving surface 26 is formed in the first throttle lever 10. Thus, the stopper receiving surface 26 and the stopper pawl 27 come into contact with each other when the accelerator drum 19 maintains the fully closed operation position A, and the opening of the throttle valve 3 by the first and second opening springs 13 is predetermined. The limp stopper means 28 for restricting the limp opening degree θ is configured.

  The cover 16 is provided with an accelerator sensor 33 for detecting the rotation position of the accelerator drum 19, that is, the accelerator opening degree from the fully closed operation position A to the fully open operation position B.

  Next, as shown in FIGS. 1 and 3, a valve opening restricting member 35 adjacent to the second throttle lever 11 is rotatably provided at the left end portion of the valve shaft 3 a via the ball bearing 6. At that time, the inner race of the two ball bearings 4 and 6 arranged in the axial direction across the second throttle lever 11 is attached to the annular shoulder 38 of the valve shaft 3a by the nut 37 screwed to the left end portion of the valve shaft 3a. By tightening, the second throttle lever 11 is fixed to the valve shaft 3a together with the inner race.

  An output shaft 36 a of an electric motor 36 attached to the throttle body 1 is connected to the valve opening restriction member 35 via a transmission device 40. The transmission device 40 includes a pinion gear 41 fixed to the output shaft 36 a, a large-diameter gear 43 that is rotatably supported by a support shaft 42 attached to the throttle body 1 and meshes with the pinion gear 41, and the large-diameter gear 43. A small-diameter gear 44 formed integrally on one side surface and a sector gear 45 formed integrally with the valve opening restricting member 35 are configured to decelerate the rotation of the output shaft 36a by two steps and transmit it to the valve opening restricting member 35. In addition, when the electric motor 36 is not energized, the electric motor 36 can be idled from the valve opening restriction member 35 side.

  On one side surface of the valve opening restriction member 35, a restriction pin 35 a that abuts on the side surface of the second throttle lever 11 facing the opening direction of the throttle valve 3 is provided. Thus, the valve opening restricting member 35 can restrict the opening of the throttle valve 3 by the urging force of the first and second opening springs 12 and 13, and the second throttle lever 11 can be opened to the minimum degree of the throttle valve 3. It is possible to rotate to a predetermined fully closed position C corresponding to the degree. The predetermined fully closed position C of the valve opening restricting member 35 is brought into contact with a stopper surface 46 formed on one end surface of the sector gear 45 and a fully closed stopper bolt 47 screwed to the throttle body 1 so as to be adjustable. It is prescribed.

  A transmission chamber 55 that houses the second throttle lever 11, the valve opening restriction member 35, the transmission device 40, the electric motor 36, and the like is formed at the left end portion of the throttle body 1. The transmission chamber 55 is defined by a second housing 50 that is integrally formed with the throttle body 1 and a cover 51 that is bolted to the open end surface of the second housing 50 via a seal member 54. The cover 51 includes a throttle sensor 52 that detects the opening of the throttle valve 3 through the valve shaft 3a, and an electronic control unit 53 that controls the operation of the electric motor 36 based on the output signals of the accelerator sensor 33 and the throttle sensor 52. And are attached. At that time, the cover 51 is formed with an outward bulging portion 51 a for accommodating the electronic control unit 53.

  As shown in FIGS. 1, 5, and 6, the cover 51 is further provided with a breathing path 57 that allows the transmission chamber 55 to breathe, and a filter chamber 58 that intervenes in an intermediate portion of the breathing path 57. . The filter chamber 58 is formed in a cylindrical shape having a bottom surface 58 a, and a cylindrical mounting hole 60 that is open to the atmosphere is connected to the filter chamber 58 via an annular step 59.

  The breathing passage 57 is provided in a first air passage 57 a formed by a stepped hole that opens to the bottom surface 58 a of the filter chamber 58 and communicates the filter chamber 58 with the transmission chamber 55, and a peripheral wall of the filter chamber 58. The second air passage 57b having a notch shape that opens 58 to the atmosphere. The second air passage 57b is disposed at the lower part of the filter chamber 58, and the outward bulging portion 51a of the cover 51 that accommodates the electronic control unit 53 is opposed to the outer end of the second air passage 57b.

  A waterproof and moisture-permeable film-like filter member 61 is adhered to the bottom surface 58a of the filter chamber 58, thereby covering the large-diameter portion of the stepped first air passage 57a. A lid 62 is fixed to the inner peripheral surface of the mounting hole 60 by press-fitting. At that time, the press-fitting depth of the lid 62 is regulated by the lid abutting against the annular step portion 59. Therefore, the notch-shaped second air passage 57 b provided on the peripheral wall of the filter chamber 58 is not closed by the lid 62.

Next, the operation of this embodiment will be described.
[Engine shutdown status]
When the engine is stopped, the accelerator drum 19 is held at the fully closed operation position A by bringing the stopper arm 30 into contact with the fully closed operation stopper bolt 31 by the urging force of the closing spring 29. On the other hand, since the operation of the electric motor 36 is stopped, the throttle valve 3 is urged in the opening direction by the first and second opening springs 12 and 13 via the first and second throttle levers 10 and 11. However, since the set load of the closing spring 29 is set to be larger than the sum of the set loads of the double springs 12 and 13 as described above, the throttle valve 3 has the stopper claw 27 of the first throttle lever 10. Stops when it comes into contact with the stopper receiving surface 26 of the accelerator drum 19. At this time, the fully closed operation position A of the accelerator drum 19 is set to the stopper arm 30 of the fully closed operation stopper bolt 31 so that the opening degree of the throttle valve 3 becomes a predetermined limp opening degree θ larger than the first idle opening degree. It is adjusted by advance and retreat with respect to.

Thus, in the state where the throttle valve 3 is held at the limp opening θ, the valve plate 3b is sufficiently separated from the inner wall of the intake passage 2, so that the inner wall of the intake passage 2 of the valve plate 3b due to condensation freezing in a cold region. Sticking to is avoided.
[When the drive system of the throttle valve 3 fails]
If the electric motor 36 and the accelerator operation system are lost during the operation of the engine, the throttle valve 3 is held at the limp opening θ by the same action as in the engine stop state. It is possible to secure the intake amount of the engine that enables the limp traveling (slow driving that enables the vehicle to reach a vehicle maintenance factory or the like).
[When idling the engine]
When the engine is started and the electronic control unit 53 determines the fully closed position of the accelerator drum 19 from the output signal of the accelerator sensor 33, the electronic control unit 53 operates the electric motor 36 and the valve opening restriction member 35. The second throttle lever 11 is rotated in the valve closing direction via the restriction pin 35 a, the throttle valve 3 is closed from the limp opening θ toward the desired idle opening, and the desired idle opening is set to the throttle sensor 52. When confirmed by the output signal, the operation of the electric motor 36 is stopped. Thus, the throttle valve 3 is maintained at a desired idle opening.

In this case, the electronic control unit 53 also receives an output signal from a sensor that detects an engine temperature (not shown), and adjusts the idle opening according to the engine temperature. Even when the throttle valve 3 is controlled to the first idle opening for warming up the engine, the stopper claw 27 of the first throttle lever 10 does not contact the stopper receiving surface 26 of the accelerator drum 19.
[During normal engine operation]
In order to accelerate the operation of the engine, if the accelerator grip 19 is pulled by the accelerator grip 20 to rotate the accelerator drum 19 to a desired opening degree, an electronic signal is generated based on the output signal of the accelerator sensor 33 that detects the rotation angle. The control unit 53 operates the electric motor 36 to rotate the restriction pin 35 a of the valve opening restriction member 35 in the opening direction of the throttle valve 3. Then, the second throttle lever 11 follows the restriction pin 35a so as to keep the contact position with the restriction pin 35a by the urging force of the first and second opening springs 12, 13, so The throttle valve 3 in an integral relationship is opened. When the electronic control unit 53 confirms that the output signal of the throttle sensor 52 for detecting the opening degree of the throttle valve 3 matches the output signal of the accelerator sensor 33 for detecting the opening degree of the accelerator drum 19, The operation of the electric motor 36 is stopped. In this way, the throttle valve 3 is held at the opening required by the operator corresponding to the opening of the accelerator drum 19.

  When the accelerator drum 19 is pulled in the valve closing direction by pulling the valve closing wire 22 by the accelerator operation in order to decelerate the operation of the engine, the electric motor 36 moves the valve opening restricting member 35 in the closing direction of the throttle valve 3. , The second throttle lever 11 is rotated in the valve closing direction by the restriction pin 35a, and the throttle valve 3 is closed until both output signals of the accelerator sensor 33 and the throttle sensor 52 are matched.

  During this time, it is normal that the stopper claw 27 of the first throttle lever 10 does not contact the stopper receiving surface 26 of the accelerator drum 19. Therefore, the electric motor 36 does not receive the repulsive force of the relatively strong closing spring 29 that biases the accelerator drum 19 in the valve closing direction. Further, when the electric motor 36 is operated in the valve closing direction, the electric motor 36 receives the repulsive force of the first and second opening springs 13 and a comprehensive set of the first and second opening springs 12 and 13. Since the load can be set to a relatively small value sufficient to open the throttle valve 3 with a small load, the load of the electric motor 36 is small and the size can be reduced. In addition, since the electric motor 36 drives the throttle valve 3 via the transmission device 40, it is sufficient that the output torque is small, and not only the size can be further reduced, but also the opening of the throttle valve 3 is made fine. Can be controlled.

Normally, the stopper claw 27 of the first throttle lever 10 does not contact the stopper receiving surface 26 of the accelerator drum 19, but the stopper claw 27 is close to the stopper receiving surface 26 facing the closing direction of the throttle valve 3. Yes. Therefore, when the valve closing wire 22 is pulled rapidly for rapid deceleration of the engine, the stopper receiving surface 26 of the accelerator drum 19 abuts against the stopper claw 27 and the first throttle lever 10 is moved in the valve closing direction. By directly rotating, the throttle valve 3 can be quickly closed without being influenced by the control delay of the electronic control unit 53 and the operation delay of the electric motor 36.
[When the electric motor 36 cannot be energized]
When the electric motor 36 becomes unable to be energized due to circuit disconnection or the like, the first and second opening springs 12 and 13 cause the throttle valve to rotate the no-load electric motor 36 idle by their urging force. 3 is rotated in the opening direction, and the stopper claw 27 of the first throttle lever 10 is brought into contact with the stopper receiving surface 26 of the accelerator drum 19. Since the total set load of the first and second opening springs 12 and 13 is smaller than the set load of the closing spring 29, the rotation in the opening direction of the throttle valve 3 is stopped when the stopper pawl 27 comes into contact with the stopper receiving surface 26. To do. Therefore, if the valve opening wire 21 and the valve closing wire 22 are pulled alternately, the throttle valve 3 can be opened and closed together with the accelerator drum 19 within the range from the limp opening degree θ to the fully open state.
[At the time of fixing failure of the electric motor 36 etc.]
When the throttle valve 3 is in the opening position exceeding the limp opening θ, even if the electric motor 36 or the transmission device 40 is stuck due to the biting of dust or the like, the throttle grip 3 is closed if the accelerator grip 20 is rotated in the valve closing direction. Since the accelerator drum 19 is forcibly rotated in the valve closing direction via the valve wire 22, the throttle valve 3 is limped through the accelerator drum 19 and the first throttle lever 10 by the valve closing operation force on the accelerator grip 20. It can be reliably closed to the opening degree θ, and does not depend on the urging force of the closing spring 29 that urges the accelerator drum 19 in the valve closing direction.

  Accordingly, the set load of the closing spring 29 holds the accelerator drum 19 at the predetermined fully closing operation position A when the engine is stopped, and the throttle valve against the urging force of the first and second opening springs 12 and 13. 3 is sufficient to constrain the limp opening degree θ, so that the set load of the closing spring 29 is lowered from the conventional one to reduce the set load difference between the closing spring 29 and the opening springs 12 and 13. It becomes possible to make it small, the valve opening operation load of the accelerator grip 20 can be reduced, and the accelerator grip 20 can be operated lightly.

  In the case of the above failure, if the throttle valve 3 is closed to the limp opening degree θ and then the accelerator grip 20 is rotated again in the valve opening direction, the throttle valve 3 is adjusted according to the opening degree of the accelerator drum 19. With the urging force of the two-opening spring 13, it can be opened up to an opening corresponding to the position of the fixed valve opening restricting member 35.

  By the way, a first housing 15 formed at one end of the throttle body 1 is provided with a first throttle lever 10, a first opening spring 12, an accelerator drum 19, a closing spring 29 and an accelerator sensor 33, and the other end of the throttle body 1. The second throttle lever 11, the second opening spring 13, the valve opening restricting member 35, the electric motor 36, the transmission device 40, and the throttle sensor 52 are provided in the second housing 50 formed in the portion. The throttle body 1 is arranged in a balanced and compact manner at both ends of the throttle body 1, and the throttle body 1 having this throttle valve control device can be easily installed even in a narrow space around the engine.

  Further, the transmission chamber 55 that houses the electric motor 36 and the transmission device 40 communicates with the atmosphere via the breathing path 57, the filter chamber 58, and the filter member 61, so that heating from the engine and heat generation of the electric motor 36 and the transmission device 40 are performed. When the temperature of the transmission chamber 55 changes due to heat dissipation, the transmission chamber 55 is ventilated through the breathing path 57, the filter chamber 58, and the filter member 61, so that the transmission chamber 55 is ventilated. It is possible to prevent condensation on the motor 36, the transmission device 40, and the like.

  Moreover, since the filter member 61 is waterproof and breathable, it does not interfere with the breathing. Of course, when the motorcycle runs on a rough road, muddy water or the like scattered by the wheels enters the filter chamber 58 from the second air passage 57b. However, the filter member 61 can prevent entry into the transmission chamber 55 side.

Also with the second gas-passage 57b is arranged in the lower part of the filter chamber 58, the outer end of its, since outward bulging portion 51a is opposed, by effectively utilizing the outward bulging portion 51a, Intrusion of muddy water or the like into the second air passage 57b can be prevented as much as possible. When muddy water or the like has entered the filter chamber 58 through the second air passage 57b, the muddy water or the like is naturally removed from the second air passage 57b. Can be drained.

  Furthermore, damage to the filter member 61 due to flying stones or the like can be prevented by the lid body 62, which can contribute to improving the durability of the filter member 61.

  In addition, a breathing path 57 and a filter chamber 58 are formed and a filter member 61 is attached to the cover 51 that is bolted to the second housing 50 that is integral with the throttle body 1. In addition, the filter member 61 can be easily attached without being obstructed by the throttle body 1.

Further, a filter member 61 is bonded to the bottom surface 58 a of the bottomed cylindrical filter chamber 58, and the annular step portion 59 is connected to the open hole 60 that is open to the atmosphere and connected to the outer end of the filter chamber 58 via the annular step portion 59. The lid 62 that is in contact with the pressure chamber is press-fitted, and the breathing path 57 is provided in the first air path 57a that communicates the filter chamber 58 with the transmission chamber 55 and the peripheral wall of the filter chamber 58 to open the filter chamber 58 to the atmosphere. Since the second air passage 57b is formed as a notch, the lid 62 can be easily pressed into the attachment hole 60 without blocking the breathing passage 57.

  The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, the electric motor 36 can be attached to the outer surface of the cover 51 and the output shaft 36 a can be inserted into the transmission chamber 55. The present invention is not limited to motorcycles but can be applied to buggy engines used for driving on rough roads.

1 is a cross-sectional front view of a throttle body of a motorcycle engine equipped with a throttle valve control device according to an embodiment of the present invention. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is an enlarged view of part 5 of FIG. 1. The perspective view of the cover of a transmission chamber.

DESCRIPTION OF SYMBOLS 1 ... Throttle body 2 ... Intake passage 3 ... Throttle valve 36 ... Electric motor 40 ... Transmission device 51 ... Side wall (cover) of transmission chamber
51a ··· outward bulging portion 55 ··· transmission chamber 57 ··· breathing passage 57a ··· first air passage 57b ··· second air passage 58 ··· filter chamber 58a · · bottom surface 59 of the filter chamber ··· -Annular step 60 ... mounting hole 61 ... filter member 62 ... lid

Claims (3)

A transmission chamber (55) is formed on one side of an engine throttle body (1) mounted on a vehicle, and an electric motor (36) is attached to the inner wall or outer wall of the transmission chamber (55). ) Is received in the transmission chamber (55) to open and close the throttle valve (3) in the intake passage (2) of the throttle body (1), and the transmission chamber (55) In an intake control device for a vehicle engine, wherein a breathing passage (57) communicating the transmission chamber (55) with the atmosphere is provided on a side wall (51) of the vehicle,
A bottomed cylindrical filter chamber (58) having one end open to the outside is formed on the side wall (51) , and a waterproof and moisture permeable filter member (61) is formed on the bottom surface (58a) of the filter chamber (58). attachment,
The breathing path (57) is provided on a first air path (57a) that communicates the filter chamber (58) with the transmission chamber (55) and on a peripheral wall of the filter chamber (58). ) With a second airway (57b) in the form of a notch that opens to the atmosphere,
An opening hole (60) open to the atmosphere connected to the outer end of the filter chamber (58) via a step portion (59) is formed in the side wall (51), and the step portion (60) is formed in the attachment hole (60). abutting lid 59) (62) wearing the, by the lid an opening of the filter chamber (58) (62), the covered that without closing the second air path (57 b) An intake control device for a vehicle engine, which is characterized. The intake control apparatus for a vehicle engine according to claim 1,
The transmission chamber (55) is defined between the throttle body (1) and a cover (51) joined to a side surface of the throttle body (1) via a seal member (54). the (51), characterized in that the said side wall (51), the intake control equipment of a vehicle engine. The intake control apparatus for a vehicle engine according to claim 1 or 2 ,
An intake control device for a vehicular engine, wherein an outward bulge portion (51a) formed on an outer surface of the side wall (51) is disposed at an outer end of the second air passage (57b).

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