JP2005098178A - Throttle valve control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the valve opening load of an accelerator operation member by reducing a difference in set load between a closed spring and open springs and securely open and close a throttle valve through an accelerator drum even if a seizure occurs in an electric motor. <P>SOLUTION: This throttle valve control device comprises the open springs 12 and 13 energizing the throttle valve 3 in an opening direction, the accelerator drum 19 attached independently of the throttle valve 3, a closed spring 29 stronger than the open springs 12 and 13 which energize the accelerator drum 19 toward a full close operation position A, and a limb stop means 28 restricting the valve opening of the throttle valve 3 by the open springs 12 and 13 to a limb opening θ at the full close operation position A. The accelerator operation member 20 is connected to the accelerator drum 19 through a valve opening wire 21 and a valve closing wire 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a throttle valve control device that controls the intake air amount of an engine of a motorcycle, an automobile, an outboard motor, etc., and in particular, is connected to a throttle valve that opens and closes an intake passage of a throttle body and opens the throttle valve. An opening spring that is urged to the position, an accelerator drum that can be reciprocally rotated between a predetermined fully-closed operation position and a fully-opened operation position independently of the throttle valve, and the accelerator drum at the fully-closed operation position. A closing spring that is biased with a set load larger than that of the opening spring, an accelerator operating member that can rotate the accelerator drum in the valve opening direction against the set load of the closing spring, the accelerator drum, and the throttle A limp provided between the valves for restricting the opening of the throttle valve by the opening spring to the limp opening at the fully closed operation position of the accelerator drum. Topper means, a valve opening restricting member for restricting opening of the throttle valve by the opening spring, an electric motor capable of driving the valve opening restricting member in the opening / closing direction of the throttle valve, and detecting the opening degree of the accelerator drum An accelerator sensor, a throttle sensor for detecting the opening of the throttle valve, and an electronic device for driving the electric motor to an opening position corresponding to the opening position of the accelerator drum based on the detection signals of the accelerator sensor and the throttle sensor The present invention relates to an improvement of a throttle valve control device including a control unit.

Such a valve device is already known as disclosed in Patent Document 1 below.
JP-A-2-181038

  In the conventional throttle valve control device, the accelerator drum can be forcibly rotated in the valve opening direction by the accelerator operating member, but the rotation of the accelerator drum in the valve closing direction depends only on the biasing force of the closing spring. doing. Moreover, when the throttle valve is in the high opening position, even if the electric motor or the transmission system between the electric motor and the valve opening restricting member is stuck, the throttle valve is moved through the accelerator drum by the biasing force of the closing spring. In order to reliably close the valve, the set load of the closing spring that urges the accelerator drum in the closing direction is set sufficiently larger than that of the opening spring that urges the throttle valve in the opening direction.

  However, it is not preferable to set a large set load for the closing spring in such a manner because it causes an increase in the valve opening operation load of the throttle operation member.

  The present invention has been made in view of such circumstances, and it is possible to reduce the valve opening operation load of the accelerator operation member by reducing the difference in the set load of the closing spring and the opening spring. It is an object of the present invention to provide the throttle valve control device that can reliably open and close the throttle valve via an accelerator drum even when the electric motor or the like is stuck when in the high opening position.

  In order to achieve the above object, the present invention is connected to a throttle valve that opens and closes an intake passage of a throttle body, and an opening spring that urges the throttle valve in an opening direction, and a predetermined independent of the throttle valve. An accelerator drum that is reciprocally rotatable between a fully closed operation position and a fully open operation position, and a closing spring that biases the accelerator drum toward the fully closed operation position with a larger set load than the opening spring. And an accelerator operating member capable of rotating the accelerator drum in the valve opening direction against the set load of the closing spring, and between the accelerator drum and the throttle valve, and in the fully closed operation position of the accelerator drum, A limp stopper means for restricting the opening of the throttle valve by the opening spring to the limp opening; and an opening for restricting the opening of the throttle valve by the opening spring. A regulating member, an electric motor that can drive the valve opening regulating member in the opening / closing direction of the throttle valve, an accelerator sensor that detects the opening degree of the accelerator drum, a throttle sensor that detects the opening degree of the throttle valve, and the accelerator In the throttle valve control device, comprising: an electronic control unit that drives the electric motor to an opening position corresponding to the opening position of the accelerator drum based on a detection signal of the sensor and the throttle sensor; A first feature is that an operation force transmitting means for forcibly transmitting an operation force in any direction of opening and closing of the accelerator operation member to the accelerator drum is provided between the accelerator drums.

  According to the present invention, in addition to the first feature, a speed reduction device is provided between the electric motor and the valve opening restriction member, which decelerates and transmits the output of the electric motor to the valve opening restriction member. Two features.

  Furthermore, in addition to the second feature, the present invention is configured such that the speed reduction device is a gear type that enables the electric motor to idle from the valve opening restriction member when the electric motor is not loaded. Is the third feature.

  Furthermore, in addition to any of the first to third features, the present invention sandwiches the accelerator drum and the accelerator sensor, the valve opening restricting member, the electric motor, the speed reducer, and the throttle sensor across the intake passage. The fourth feature is that they are arranged on both sides of the throttle body.

  Furthermore, in addition to any one of the first to fourth features, the present invention provides the limp stopper means on a stopper portion provided on the throttle valve side and on the accelerator drum side. A stopper receiving portion for receiving the stopper portion and restricting the throttle valve to the limp opening degree when in the closed operation position, and when the electric motor is normally operated by the electronic control unit, the stopper portion and the stopper receiving portion The fifth feature is that the throttle valve is opened and closed by the electric motor in accordance with the opening degree of the accelerator drum while the gap is maintained in a non-contact state.

  According to the first feature of the present invention, when the throttle valve is in the opening position that exceeds the limp opening degree, the accelerator operation member is closed even if the portion from the electric motor to the valve opening restriction member is stuck. If it rotates in the valve direction, the throttle drum can be forcibly rotated in the valve closing direction and the throttle valve can be reliably closed to the limp opening without depending on the biasing force of the opening spring. Therefore, the set load of the closing spring is large enough to hold the accelerator drum at the predetermined fully-closed operation position when the engine is stopped and to restrain the throttle valve to the limp opening degree against the biasing force of the opening spring. Therefore, it is possible to reduce the set load difference between the closing spring and the opening spring by lowering the set load of the closing spring than the conventional one, and to reduce the valve opening operation load of the accelerator operating member. Can do.

  Further, according to the second feature of the present invention, the throttle valve can be closed against the biasing force of the opening spring even with a relatively small output of the electric motor by the deceleration action of the reduction gear. As a result, the throttle valve opening can be finely controlled.

  Further, according to the third feature of the present invention, even when the electric motor cannot be energized, the throttle valve can be opened and closed in the range from the limp opening to the full open while the electric motor is idling from the accelerator drum side.

  Furthermore, according to the fourth aspect of the present invention, the throttle valve control device can be disposed in a balanced and compact manner at both ends of the throttle body, and the throttle body having the throttle valve control device can be disposed around the engine. It can be easily installed even in a narrow space.

  Furthermore, according to the fifth feature of the present invention, during normal operation of the electric motor by the electronic control unit, the electric motor does not receive any repulsive force of the closing spring that urges the accelerator drum in the valve closing direction. Therefore, since the electric motor only receives a relatively small repulsive force of the opening spring when operated in the closing direction of the throttle valve, the load of the electric motor is small and the size can be reduced.

  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 cross-sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 4 is a sectional view taken along line -3, and FIG. 4 is a sectional view taken along line 4-4 of FIG.

  1 and 2, a throttle body 1 connected to an intake system of a motorcycle engine has an intake passage 2 connected to the intake port of the engine, and a throttle valve that opens and closes the intake passage 2. 3 is provided in 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 through 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 for injecting 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 the 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 accommodates the first throttle lever 10 and the first opening spring 12 is integrally formed at the right end 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 3a 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 coming into contact with the fully-closed operation stopper bolt 31 and the fully-open operation stopper bolt 32 that are screwably attached to the cover 16.

  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.

  As shown in FIGS. 1 and 2, 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 constitute an operating force transmission means 23 for forcibly transmitting the operating force in any direction of opening and closing of the accelerator grip 20 to the accelerator drum 19.

  The accelerator drum 19 is provided with a large notch 25 on the outer periphery thereof. An inner end surface 26 of the notch 25 facing the closing direction of the throttle valve 3 is a stopper receiving surface, and a stopper claw 27 facing the stopper receiving surface 26 is formed on 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.

  An accelerator sensor 33 is attached to the cover 16 for detecting the rotational position of the accelerator drum 19, that is, the accelerator opening 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 on 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 portion 38 of the valve shaft 3a by a 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 reduction gear 40. The reduction gear 40 includes a pinion gear 41 fixed to the output shaft 36 a, a large-diameter gear 43 that is rotatably supported on 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, and the rotation of the output shaft 36a is decelerated by two steps and transmitted 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. As a result, 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 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 second housing 50 that accommodates the second throttle lever 11, the valve opening restriction member 35, the reduction gear 40, the electric motor 36, and the like is integrally formed at the left end of the throttle body 1, and the second housing 50 is opened. The cover 51 is joined to the end surface. The cover 51 includes a throttle sensor 52 that detects the opening degree 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 output signals of the accelerator sensor 33 and the throttle sensor 52. And are attached.

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 biasing 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, as described above, since the set load of the closing spring 29 is set larger than the sum of the set loads of the double springs 12 and 13, the throttle valve 3 is provided with 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 fail during engine operation, the throttle valve 3 is held at the limp opening θ by the same action as in the engine stop state. Therefore, 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 to 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 of 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 pawl 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 drum 19 is rotated to a desired opening degree by pulling the valve opening wire 21 by the accelerator grip 20, 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 while maintaining the contact position with the restriction pin 35a by the urging force of the first and second opening springs 12 and 13, 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 as well, 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, 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. Moreover, since the electric motor 36 drives the throttle valve 3 via the speed reducer 40, the output torque of the electric motor 36 is sufficient, and not only can the size be further reduced, but the opening of the throttle valve 3 can be made finer. 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 due to the rapid deceleration of the engine, the stopper receiving surface 26 of the accelerator drum 19 abuts against the stopper claw 27 so that 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 while the unloaded electric motor 36 is idled 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 contacts the stopper receiving surface 26. To do. Therefore, by alternately pulling the valve opening wire 21 and the valve closing wire 22, the throttle valve 3 can be opened and closed together with the accelerator drum 19 within the range from the limp opening 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 speed reducer 40 is stuck due to the biting of dust or the like, if the accelerator grip 20 is rotated in the valve closing direction, the throttle valve 3 is closed. 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. The opening can be reliably closed to the opening degree θ, and it 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 resists the urging force of the first and second opening springs 12, 13. 3 is sufficient to restrain the limp opening θ, so that the set load of the closing spring 29 and the opening springs 12 and 13 is reduced by lowering the set load of the closing spring 29 from the conventional one. 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 moved according to the opening degree of the accelerator drum 19. The opening degree corresponding to the position of the fixed valve opening restricting member 35 can be opened by the urging force of the two opening springs 13.

  Incidentally, the 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. Since the second throttle lever 11, the second opening spring 13, the valve opening restricting member 35, the electric motor 36, the speed reduction device 40, and the throttle sensor 52 are provided in the second housing 50 formed in the portion, the throttle valve control device 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 equipped with the throttle valve control device can be easily installed even in a narrow space around the engine.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, the first and second opening springs 12 and 13 can be unified to any one. Of course, the present invention can also be applied to a throttle valve control device for an outboard motor having an accelerator grip on a rod-like steering handle.

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.

Explanation of symbols

A ... Fully closed position B ... Fully open position 1 ... Throttle body 2 ... Intake passage 3 ... Throttle valves 12, 13 ... Opening spring 19 ... Accelerator drum 20 Accelerator operating member (Accelerator grip)
23 ... Operating force transmission means 26 ... Stopper receiving part (stopper receiving surface)
27 ... Stopper (stopper claw)
28 ... Limp stopper means 29 ... Closing spring 33 ... Accelerator sensor 35 ... Valve opening restricting member 36 ... Electric motor 40 ... Deceleration device 52 ... Throttle sensor 53 ... Electronic Controller unit

Claims (5)

An open spring (12, 13) connected to a throttle valve (3) for opening and closing an intake passage (2) of the throttle body (1) and urging the throttle valve (3) in an opening direction, and a throttle valve (3 Independently from the above, the accelerator drum (19) provided to be reciprocally rotatable between a predetermined fully-closed operation position (A) and the fully-open operation position (B), and the accelerator drum (19) To the operating position (A), a closing spring (29) biased with a larger set load than the opening springs (12, 13), and the accelerator drum ( 19) is provided between an accelerator operating member (20) capable of rotating the valve opening direction, the accelerator drum (19) and the throttle valve (3), and at the fully closed operation position (A) of the accelerator drum (19). , The throttle valve (3 A limp stopper means (28) for restricting the valve opening by the opening springs (12, 13) to the limp opening (θ) and the valve opening by the opening springs (12, 13) of the throttle valve (3). A valve opening restricting member (35), an electric motor (36) capable of driving the valve opening restricting member (35) in the opening / closing direction of the throttle valve (3), and the opening degree of the accelerator drum (19). An accelerator sensor (33), a throttle sensor (52) for detecting the opening of the throttle valve (3), and the electric motor (36) based on detection signals of the accelerator sensor (33) and the throttle sensor (52). A throttle valve control device comprising an electronic control unit (53) driven to an opening position corresponding to the opening position of the accelerator drum (19),
Between the accelerator operating member (20) and the accelerator drum (19), the operating force in either direction of opening or closing of the accelerator operating member (20) is forcibly transmitted to the accelerator drum (19). An operating force transmission means (23) for providing a throttle valve control device. The throttle valve control device according to claim 1,
A speed reduction device (40) is provided between the electric motor (36) and the valve opening restriction member (35) to decelerate and transmit the output of the electric motor (36) to the valve opening restriction member (35). A throttle valve control device. The throttle valve control device according to claim 2,
The speed reducer (40) is configured as a gear type that enables the electric motor (36) to be idled from the valve opening restricting member (35) when the electric motor (36) is not loaded. A throttle valve control device. In the throttle valve control device according to any one of claims 1 to 3,
The accelerator drum (19) and the accelerator sensor (33), the valve opening restricting member (35), the electric motor (36), the speed reducer (40), and the throttle sensor (52) are connected to the intake passage (2). A throttle valve control device, characterized in that the throttle valve (1) is disposed on both sides of the throttle body (1). In the throttle valve control device according to any one of claims 1 to 4,
The limp stopper means (28) is provided on a throttle portion (27) provided on the throttle valve (3) side and on the accelerator drum (19) side, and the accelerator drum (19) is moved to the fully closed operation position (A ), A stopper receiving portion (26) for receiving the stopper portion (27) and restricting the throttle valve (3) to the limp opening degree, and an electric motor (36) by the electronic control unit (53). ) During normal operation, the throttle valve (3) is opened by the electric motor (36) while keeping the stopper portion (27) and the stopper receiving portion (26) in a non-contact state. A throttle valve control device that opens and closes according to the degree.

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