JP4394962B2 - Throttle valve opening / closing control device for motorcycle engine - Google Patents

Description

The present invention is fixed to the valve shaft so as to adjust a valve shaft which is rotatably supported in the intake path forming body forming an intake passage of an engine mounted on a motorcycle, the flow area of the intake passage a throttle valve that is, the accelerator grip is rotated operated manually to open and close the throttle valve, and an electric actuator for rotating operates to automatically open and close the throttle valve, the throttle valve is closed to the side A throttle valve opening and closing of a motorcycle engine in which the accelerator grip and the electric actuator are coupled to the valve shaft such that the closing operation of the accelerator grip is transmitted to the valve shaft in preference to the operation of the electric actuator. The present invention relates to a control device.

An accelerator grip and an electric motor that is an electric actuator include a first bevel gear that is continuous with the accelerator grip , a second bevel gear that is continuous with the valve shaft, a carrier that is rotationally driven by the electric motor, and first and second bevel gears. The operation of closing the accelerator grip toward the closing side of the throttle valve has priority over the operation of the transmission motor by being connected to the valve shaft via a three-way transmission device that meshes and is supported by a bevel pinion supported by the carrier. A throttle valve opening / closing control device for a motorcycle engine that is transmitted to a valve shaft is already known from Patent Document 1.
JP 2002-106368 A

  However, in the case of using the three-way transmission device as in the prior art, not only the structure becomes complicated and the number of parts increases, but also a space for installing the three-way transmission device is secured around the valve shaft. In particular, there is a limitation in layout in a small vehicle such as a motorcycle that is difficult to secure a space.

The present invention has been made in view of such circumstances, and while simplifying the structure and reducing the number of parts, the space required around the valve shaft is reduced and the degree of freedom in layout is increased. Another object of the present invention is to provide a throttle valve opening / closing control device for a motorcycle engine.

In order to achieve the above object, the invention according to claim 1 is a valve shaft rotatably supported on an intake passage forming body forming an intake passage of an engine mounted on a motorcycle, and the flow of the intake passage. A throttle valve that is fixed to the valve shaft so as to adjust the area, an accelerator grip that is manually rotated to open and close the throttle valve, and an electric that rotates to automatically open and close the throttle valve The accelerator grip and the electric actuator are transmitted to the valve shaft in preference to the operation of the electric actuator so that the closing operation of the accelerator grip toward the closing side of the throttle valve is transmitted to the valve shaft. in the throttle valve opening and closing control device of a motorcycle engine, which is coupled to said electric actuator, And a reduction gear connected in series to the electric motor to reduce the output of the motor. The rotation power of the reduction gear is provided from one end of an actuator case that is rotatably supported on the body frame. Output shaft is projected coaxially,
The output shaft is configured separately from the valve shaft, and is arranged outside the intake passage forming body and in parallel with the valve shaft, and is rotatably supported by a vehicle body frame and provided on the accelerator grip. A first driving drum and a first driven drum provided in the actuator case are linked and connected to each other via a first wire, the second driving drum provided in the output shaft, and the valve shaft A second driven drum provided at one end projecting out of the intake passage forming body is linked and connected to each other via a second wire, and the throttle valve is connected between the actuator case and the output shaft. Forcibly closing means for driving the output shaft to the closing side of the throttle valve according to the rotation of the actuator case to the closing side is provided.

According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, a shaft to be detected is coaxially connected to the other end of the actuator case to detect the opening of the throttle valve. A throttle opening sensor is connected to an end portion of the output shaft, and an accelerator operation amount sensor for detecting an operation amount of the accelerator grip is connected to an end portion of the detected shaft .

According to a third aspect of the present invention, in addition to the configuration of the second aspect , the throttle opening sensor and the accelerator operation amount sensor are both supported by a vehicle body frame .

Further, the invention according to claim 4 is a transmission system comprising the second drive drum, the second driven drum, and the second wire in addition to the configuration of the invention according to any one of claims 1 to 3. The throttle valve and the actuator are arranged on the same side as viewed from the above, and the position of the throttle valve in the direction along the valve shaft and the position of the actuator in the direction along the valve shaft are partially over. it characterized in that the wrap.

According to the first aspect of the invention, the actuator case is rotated in accordance with the operation of the accelerator grip and the operation of the electric actuator is controlled to restrict the throttle valve from opening beyond the operation amount of the accelerator grip. In addition, it is possible to ensure the closing operation of the throttle valve by the closing operation of the accelerator grip even when the electric actuator fails. Moreover, since the actuator case can be rotated and only a forced valve closing means is provided between the actuator case and the valve shaft, the structure can be simplified and the number of parts can be reduced, and it is necessary around the valve shaft. It is possible to increase the degree of freedom in layout by reducing the space taken up.

Further, the rotation operation force of the accelerator grip can be transmitted to the actuator case with a simple structure, and the actuator case can be rotated by the rotation amount corresponding to the rotation operation amount of the accelerator grip .

Further electrical actuator is unnecessary to be provided separately from reduction mechanism and can simplify the entire throttle valve opening and closing control device.

Embodiments of the present invention will be described below based on reference examples shown in the accompanying drawings and one embodiment of the present invention.

1 to 3 show a first reference example, FIG. 1 is a perspective view showing a configuration of a throttle valve opening / closing control device, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 6 is a relationship characteristic diagram of the throttle opening.

  First, in FIG. 1, for example, an intake pipe 11 as an intake passage forming body disposed in an intake system of an engine mounted on a motorcycle has an intake passage 12 for adjusting the opening degree of the intake passage 12. The butterfly throttle valve 13 is fixed to a valve shaft 14 that is rotatably supported by the intake pipe 11 so as to cross the intake passage 12.

  An accelerator grip 16 as an accelerator operating member that is manually operated to open and close the throttle valve 13 is provided at the right end of the steering bar handle 15 so as to be able to rotate. The throttle valve 13 is automatically opened and closed by the rotation of the electric motor 17 which is an electric actuator, and the closing operation of the accelerator grip 16 toward the closing side of the throttle valve 13 has priority over the operation of the electric motor 17. An accelerator grip 16 and an electric motor 17 are connected to the valve shaft 14 so as to be transmitted to the valve shaft 14.

  The electric motor 17 has a motor case 18 that is an actuator case. The motor case 18 is fixed to a fixed support body, for example, a body frame 19 of a motorcycle via a pair of ball bearings 20 and 20, for example. It is rotatably supported.

  Moreover, the electric motor 17, that is, the motor case 18 is arranged coaxially with the valve shaft 14, and the electric motor 17 is directly and coaxially connected to one end of the valve shaft 14 protruding from the intake pipe 11. The accelerator grip 16 is connected to the motor case 18 so as to rotate the motor case 18 according to the operation of the accelerator grip 16, and includes a driving drum 21 provided on the accelerator grip 16, A driven drum 22 provided coaxially with the motor case 18 is connected by a pair of wires 23 and 23.

  A detected shaft 24 is coaxially connected to the motor case 18 on the side opposite to the valve shaft 14, and an accelerator operation amount sensor 25 for detecting the operation amount of the accelerator grip 16 is connected to the detected shaft 24. And supported by the vehicle body frame 19. A throttle opening sensor 26 for detecting the opening of the throttle valve 13 is connected to the other end of the valve shaft 14 protruding from the intake pipe 11, and this throttle opening sensor 26 is also supported by the vehicle body frame 19. .

  Referring also to FIG. 2, between the motor case 18 and the valve shaft 14, the valve shaft 14 is driven to the closing side of the throttle valve 13 according to the rotation of the motor case 18 to the closing side of the throttle valve 13. The forced valve opening means 27 is provided. The forced valve opening means 27 includes a first pin 28 projecting in parallel with the valve shaft 14 from one end surface of the motor case 18 on the valve shaft 14 side, and the motor case 18. On the other hand, a second pin 29 is provided along the radial direction of the valve shaft 14 so as to come into contact with the first pin 28 as the valve shaft 14 rotates relative to the opening direction of the throttle valve 13. It consists of.

  Thus, when the electric motor 17 is in the non-operating state, when the motor case 18 rotates in response to the operation of the accelerator grip 16, the valve shaft is kept with the second pin 29 kept in contact with the first pin 28. 14 rotates together with the motor case 18.

  Further, the rotation end of the valve shaft 14 toward the closing side is regulated by the second pin 29 coming into contact with the third pin 30 according to the rotation of the valve shaft 14 toward the closing side. The 3-pin 30 may be provided in the motor case 18 as indicated by a chain line in FIG. In this case, the operation amount of the accelerator grip 16 is the fully open operation amount, and therefore the valve shaft 14 is rotated to the position where the throttle valve 13 is fully closed with the motor case 18 fully rotated to the open side. Then, the third pin 30 is provided in the motor case 18 at a position where the second pin 29 is brought into contact with the motor case 18. That is, the rotation angle range α of the valve shaft 14 that is regulated by the second pin 29 coming into contact with the first pin 28 and the third pin 30 is the rotation angle from the fully open position to the fully closed position of the throttle valve 13. It becomes a range.

  By the way, the third pin 30 is for preventing the throttle valve 13 from rotating too far to the closed side and exceeding the fully closed position, and is not necessarily required. It may be provided at a fixed position other than the case 18.

Next, the operation of the reference example will be described. An electric motor 17 having a motor case 18 rotatably supported by a vehicle body frame 19 is connected to the valve shaft 14, and the accelerator grip 16 is used for operating the accelerator grip 16. Accordingly, the motor case 18 is connected to the motor case 18 so as to rotate, and the valve shaft 14 is connected between the motor case 18 and the valve shaft 14 according to the rotation of the motor case 18 toward the side where the throttle valve 13 is closed. Forcibly closing means 27 for driving the throttle valve 13 toward the closing side of the throttle valve 13 is provided.

  In such a throttle valve opening / closing control apparatus, when the accelerator grip 16 is operated without controlling the operation of the electric motor 17 and the electric motor 17 is in the non-operating state, as shown by the solid line A in FIG. The opening degree of 13 can be proportionally changed according to the accelerator operation amount. When the accelerator grip 16 is operated while controlling the operation of the electric motor 17 so that the valve shaft 14 rotates relative to the motor case 18 relative to the closing side, as shown by the solid line B in FIG. When the throttle valve 13 starts to open after reaching a predetermined value, the throttle valve 13 is restricted from opening beyond the amount of operation of the accelerator grip 16, and when performing wheel traction control or vehicle speed cruise control, Regardless of the amount of operation of the accelerator grip 16, the opening of the throttle valve 13 can be freely controlled. Further, even when the electric motor 17 fails, the closing operation of the throttle valve 13 can be secured by the operation of the forced valve opening means 27 according to the closing operation of the accelerator grip 16.

  Moreover, since the motor case 18 is rotatable and only the forced valve closing means 27 is provided between the motor case 18 and the valve shaft 14, the structure can be simplified and the number of parts can be reduced. The space required around 14 can be reduced to increase the degree of freedom in layout.

  In addition, since the electric motor 17 and the valve shaft 14 are coaxially arranged, the structure can be further simplified, the space required around the valve shaft 14 is reduced, and the layout is improved. The degree of freedom can be further increased.

  Further, in order to rotate the motor case 18 according to the operation of the accelerator grip 16, a drive drum 21 provided on the accelerator grip 16 and a driven drum 22 provided coaxially with the motor case 18 are a pair of wires 23. , 23, the rotation operation force of the accelerator grip 16 is transmitted to the motor case 18 with a simple structure, and the motor case 18 is rotated by the rotation amount corresponding to the rotation operation amount of the accelerator grip 16. Can do.

FIG. 4 shows a second reference example, and parts corresponding to the first reference example are given the same reference numerals.

  A motor case 18 of the electric motor 17 that is directly and coaxially connected to the valve shaft 14 is rotatably supported on the vehicle body frame 19, and a pair of wires 33, 33 is attached to a drive drum 31 provided on the accelerator grip 16. A driven drum 32 connected to the vehicle body 19 is rotatably supported by the vehicle body frame 19. One side of the driven drum 32 has an operation amount of a drive gear 34 and an accelerator grip rotating together with the driven drum 32. An accelerator operation amount sensor 25 to be detected is connected coaxially, and the drive gear 34 is engaged with a driven gear 35 provided coaxially with the motor case 18.

According to the second reference example, the accelerator operation amount sensor 25 for detecting the operation amount of the accelerator grip 16 is disposed at a position offset from the axis of the valve shaft 14, and the accelerator operation amount sensor 25 is moved from the valve shaft 14 to its axis. Since it arrange | positions so that it may not protrude in the direction outward, the enlargement of the throttle valve opening / closing control device in the direction along the axis of the valve shaft 14 can be avoided.

By the way, the gear ratio of the drive gear 34 and the driven gear 35 is set to 1/1 in the second reference example. However, the accelerator operation of the accelerator grip 16 is accelerated or decelerated to the motor case 18. In order to transmit, the gear ratio of the drive gear 34 and the driven gear 35 may be changed from 1/1.

FIG. 5 shows an embodiment of the present invention, and parts corresponding to the first reference example are given the same reference numerals.

  An accelerator grip 16 that is manually operated to open and close the throttle valve 13 and an electric actuator 37 that automatically opens and closes the throttle valve 13, and the closing operation of the accelerator grip 16 toward the side that closes the throttle valve 13 is performed by the electric actuator 37. It is connected to the valve shaft 14 so as to be transmitted to the valve shaft 14 in preference to the operation of.

  The electric actuator 37 is formed by connecting an electric motor 39 and a speed reducer 40 that decelerates the output of the electric motor 39 in series. The speed reducer 40 reduces the rotation of the electric motor 39 and is coaxial. For example, a device using a planetary gear or a device using a harmonic drive mechanism is suitable.

  An actuator case 38 provided in the electric actuator data 37 is rotatably supported on a fixed support, for example, a body frame 19 of a motorcycle via a pair of ball bearings 41 and 41, for example.

  The accelerator grip 16 is connected to the actuator case 38 so as to rotate the actuator case 38 according to the operation of the accelerator grip 16, and includes a driving drum 42 provided on the accelerator grip 16, A driven drum 43 provided coaxially with the actuator case 38 is connected by a pair of wires 44 and 44.

An output shaft 46 for outputting the rotational power of the electric actuator 37, that is, the speed reducer 40, protrudes coaxially from one end of the actuator case 38, and the detected shaft 45 is coaxially connected to the other end of the actuator case 38. Thus, a throttle opening sensor 26 for detecting the opening of the throttle valve 13 is connected to the output shaft 46, and an accelerator operation amount sensor 25 for detecting the operation amount of the accelerator grip 16 is connected to the detected shaft 45. The throttle opening sensor 26 and the accelerator operation amount sensor 25 are both supported by the vehicle body frame 19.

  A portion of the output shaft 46 near the throttle opening sensor 26 is supported on the vehicle body frame 19 via a ball bearing 47, and a drive drum 48 is fixed to the output shaft 46 between the ball bearing 47 and the electric actuator 37. Is done. On the other hand, a driven drum 49 is fixed to the end of the valve shaft 14 protruding from the intake pipe 11, and the driving drum 48 and the driven drum 49 are connected by a pair of wires 50 and 50. That is, the valve shaft 14 is linked and connected to the output shaft 46.

Between the actuator case 38 and the output shaft 46 linked to and connected to the valve shaft 14, the output shaft 46, that is, the valve shaft 14 is throttled according to the rotation of the actuator case 38 toward the side where the throttle valve 13 is closed. 13 is provided on the side of the output shaft 46 of the actuator case 38 in the same manner as the forced valve closing means 51 of the first reference example. From the first pin 52 projecting in parallel with the output shaft 46, and the output shaft 46 abuts against the actuator pin 38 in response to the relative rotation of the output shaft 46 in the opening direction of the throttle valve 13. Accordingly, the second pin 53 is provided along the radial direction of the output shaft 46.

According to the actual施例, the actuator case 38 and rotatably interlocked with the actuator case 38 and the valve stem 14, since the forced closing means 51 is provided between the output shaft 46 connected, the structure simple The number of parts and the number of parts can be reduced, and the space required around the valve shaft 14 can be reduced to increase the degree of freedom in layout.

  Further, in order to rotate the actuator case 38 according to the operation of the accelerator grip 16, a drive drum 42 provided on the accelerator grip 16 and a driven drum 43 provided coaxially with the actuator case 38 are a pair of wires 44. 44, the rotation operation force of the accelerator grip 16 is transmitted to the actuator case 38 with a simple structure, and the actuator case 38 is rotated by the rotation amount corresponding to the rotation operation amount of the accelerator grip 16. Can do.

  Moreover, the electric actuator 37 is formed by connecting an electric motor 39 and a speed reducer 40 that decelerates the output of the electric motor 39 in series, and it is not necessary to provide a speed reduction mechanism separately from the electric actuator 37. The entire throttle valve opening / closing control device can be simplified.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

  For example, in each of the above embodiments, the intake passage forming body is the intake pipe 11, but the present invention can also be applied to a throttle valve opening / closing control device in which the intake passage forming body is a carburetor or a throttle body.

The perspective view which shows the structure of the throttle valve opening / closing control apparatus of a 1st reference example. 2-2 sectional view of FIG. Relational characteristic diagram of accelerator operation amount and throttle opening The perspective view which shows the structure of the throttle valve opening / closing control apparatus of the 2nd reference example. The perspective view which shows the structure of the throttle valve opening / closing control apparatus of the Example of this invention .

11 ... intake pipe 12 ... intake passage 13 ... throttle valve 14 ... valve shaft 16 ... A Kuseruguri' flop 19 ... vehicle body frame 25 ... accelerator operation or the suction air path structure Quantity sensor
26 ... Throttle opening sensor 37 ... Electric actuator 38 ... Actuator case 39 ... Electric motor 40 ... Speed reducer
42... First driving drum
43 ... 1st driven drum
44 ... 1st wire
45 ... Detected shaft
46 ... Output shaft
48 ... second drive drum
49 ... second driven drum
50 ... second wire
5 1 ... Forced valve closing means

Claims (4)

Air intake path forming body forming an intake passage of an engine mounted on a motorcycle (12) (11) rotatably supported by the valve shaft (14), regulates the flow area of the intake passage (12) Thus, the throttle valve (13) fixed to the valve shaft (14), the accelerator grip (16) manually rotated to open and close the throttle valve (13), and the throttle valve (13) automatically and an electric actuator for rotating operates to open and close (3 7), actuating said closing operation of the accelerator grip (16) for closing the side throttle valve (13) of said electric actuator (3 7) connected to preferentially the valve shaft the so as to be transmitted to the (14) the accelerator grip (16) and the electrical actuator (3 7) the valve shaft (14) In the throttle valve opening and closing control device of the motorcycle engines,
The electric actuator (37) includes an electric motor (39) and a speed reducer (40) connected in series to the electric motor (39) to decelerate the output of the motor (39). From one end of the actuator case (38) rotatably supported by (19), an output shaft (46) for outputting the rotational power of the speed reducer (40) is projected coaxially,
The output shaft (46) is configured independently of the valve shaft (14), and is disposed outside the intake passage forming body (11) in parallel with the valve shaft (14). (19) is pivotally supported,
A first drive drum (42) provided on the accelerator grip (16) and a first driven drum (43) provided on the actuator case (38) are connected via a first wire (44, 44). Linked and linked to each other
A second driving drum (48) provided on the output shaft (46) and a second driven drum (1) provided on one end of the valve shaft (14) protruding outside the intake passage forming body (11) ( 49) are linked and connected to each other via the second wires (50, 50),
Said actuator case (3 8) and said output shaft (46) between the throttle valve output shaft (46) in response to the rotation of the throttle valve the actuator case to the (13) closing the side (3 8) (13) of the closed valve forced closure means for driving (5 1) and which are located on the side, of a motorcycle engine throttle valve opening and closing control device. A detected shaft (45) is coaxially connected to the other end of the actuator case (38), and a throttle opening sensor (26) for detecting the opening of the throttle valve (13) is connected to the output shaft ( 46) An accelerator operation amount sensor (25) connected to an end portion of 46) and detecting an operation amount of the accelerator grip (16) is connected to an end portion of the detected shaft (45). Item 2. A throttle valve opening / closing control device for a motorcycle engine according to Item 1. The throttle valve opening / closing control device for a motorcycle engine according to claim 2 , wherein both the throttle opening sensor (26) and the accelerator operation amount sensor (25) are supported by a vehicle body frame (19) . The throttle valve (13) and the actuator (37) as seen from the transmission system comprising the second drive drum (48), the second driven drum (49) and the second wire (50, 50). The position of the throttle valve (13) in the direction along the valve shaft (14) and the position of the actuator (37) in the direction along the valve shaft (14) are partially arranged on the same side. characterized in that the overlap, the throttle valve opening and closing control equipment of the motorcycle engine according to claim 1.

Images