JP2009121344A - Kick start type motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an engine start by using a kick pedal in the state of housing a main stand, increasing a degree of freedom in design of a motorcycle with a continuously variable transmission. <P>SOLUTION: In this kick start type motorcycle, a main stand 37 is fitted to a vehicle body frame 11, accurately to a pivot plate 21 freely to be turned between a standing condition and a housing condition sprung up from the standing condition, and an engine 31 is started by kicking a kick pedal 51. The main stand 37 is provided with a stand switch 114 to be turned off in the housing condition and to be turned on in the standing condition, and a control section is provided so as to inhibit a start by the kick pedal 51 based on the OFF information of the stand switch 114 in the housing condition wherein the main stand 37 is sprung up. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement of a kick start type motorcycle.

2. Description of the Related Art A motorcycle equipped with a continuously variable transmission and starting an engine with a kick pedal is known (for example, see Patent Document 1).
In such a motorcycle, if the rear wheel is grounded at the time of kick start, a large driving force may be transmitted to the rear wheel via the continuously variable transmission when the engine starts depending on the rotation position of the throttle grip. is there.

  In order to prevent unintended start by the motorcycle driver at this time, in Patent Document 1, a kicked kick pedal is used in a state where the rear wheel is grounded, that is, in a state where the main stand is flipped up and stored. Engages the main stand and prevents the kick pedal from rotating.

  Also, a motorcycle is provided with a side stand switch for detecting whether or not the side stand is stored, and when the side stand is stored, the engine controls ignition on the basis of switch information from the side stand switch. (For example, see Patent Document 2).

2 and 4 of Patent Document 1 will be described below.
An automatic continuously variable transmission case 10 is integrally connected to the rear portion of the engine 9 extending vertically to form a swing type engine unit 8, and a rear wheel 11 is attached to the rear end of the automatic continuously variable transmission case 10. A kick arm 40 is attached to the left side of 9 and a main stand 25 is rotatably attached to the lower part of the engine 9.

  A footrest protrusion 31 extending laterally is provided on one of the leg portions 26 of the main stand 25, and a kick pedal 41 and an engaging protrusion 42 protruding downward are provided on the kick arm 40.

  In the state where the main stand 25 is stored, when the engine 9 is started by depressing the kick pedal 41 of the kick arm 40, the engagement protrusion 42 of the kick pedal 41 is engaged with the foot protrusion 31 of the main stand 25, The kick arm 40 is prevented from rotating and the engine 9 cannot be started.

  FIG. 1 of Patent Document 2 describes a side stand switch 3 that is switched so that the contacts a and b are connected when the side stand is stored and the contacts b and c are connected when the side stand is not stored. Has been.

Japanese Patent Publication No.2-14991 Japanese Utility Model Publication No. 64-32463

  In a scooter type motorcycle such as Patent Document 1, since the rear wheel 11 is attached to the rear end of the swing type engine unit 8, the distance from the engine 9 to the rear wheel 11 is shortened, and the main stand 25 is In order to prevent interference with the rear wheel 11, it is provided near the front end of the swing type power unit 8, that is, at the front end of the engine 9.

  As a result, the position in the front-rear direction of the main stand 25 and the kick arm 40 provided on the left side of the engine 9 is close, and it is easy to engage the foot protrusion 31 of the instand 25 and the kick arm 40. However, the positional relationship between the main stand 25 and the kick arm 40 is limited, and the design freedom of the motorcycle is limited.

  When the engine start prevention structure for engaging the kick arm and the main stand is difficult in the main stand retracted state, a method of using an electrical start prevention structure is conceivable. Conventionally, there is an electrical start prevention structure in which a side stand switch is provided and the starter cannot be driven or the engine can be ignited only when the side stand protrudes downward as disclosed in Cited Document 2. Since the prevention structure does not take into account prevention of kick start in the main stand retracted state, kick start cannot be prevented appropriately.

  An object of the present invention is to prevent engine start by a kick pedal in a state where a main stand is stored while increasing a design freedom of a motorcycle with a continuously variable transmission.

  According to the first aspect of the present invention, the main stand is pivotally attached to the vehicle body frame between the standing state and the stowed state in which the main stand is flipped up from the standing state, and the engine is started by kicking the kick pedal. In a motorcycle, the main stand is provided with a stand switch that is turned off in the retracted state and turned on in the standing state, and in the retracted state of the main stand, a control unit that prohibits start by the kick pedal based on the off information of the stand switch Is provided.

As an operation, when the main stand is moved from the standing state to the retracted state, the rear wheels as drive wheels driven by the engine are changed from the non-grounded state to the grounded state. At the same time, the stand switch is turned off from on.
As a result, the control unit prohibits engine start when the kick pedal is depressed to start the engine. Therefore, the driving force is not transmitted to the rear wheel in the grounded state.

  In the invention according to claim 2, a control unit is provided in a circuit of a CDI device that supplies an ignition signal to an ignition plug of an engine, and the control unit includes at least a first transistor and a second transistor, The base is connected to one of the movable contact or fixed contact of the stand switch, the emitter is connected to a pulse generator that is activated by the operation of the kick pedal, the collector is connected to the ignition coil, and in the second transistor, the base is connected to the first transistor. The collector is connected to the ground, the collector is connected to the base of the first transistor, the collector of the first transistor and the base of the second transistor are connected in parallel to one end of the capacitor, and the other end of the capacitor and the stand It is characterized in that the other of the movable contact or fixed contact of the switch is grounded That.

  As an operation, when the main stand is in an upright state and the stand switch is turned on, when a pulse current is supplied from the pulse generator to the first transistor, current flows from the emitter of the first transistor to the base, thereby A pulse current flows from the emitter to the collector, and this pulse current is supplied to the primary side of the ignition coil and the capacitor is charged.

  When the pulse current is supplied to the primary side of the ignition coil, a high voltage is generated on the secondary side of the ignition coil, and this high voltage is supplied to the ignition plug, whereby the ignition plug is ignited and the engine is started.

  Even when the main stand is in the retracted state and the stand switch is turned off while the engine is in operation, current is supplied from the charged capacitor to the second transistor, and current flows from the base of the second transistor to the emitter. Current flows from the collector to the emitter of the transistor.

  As a result, since the pulse current flows from the emitter to the base of the first transistor, the pulse current flows from the emitter to the collector of the first transistor, and the pulse current is supplied to the primary side of the ignition coil, as described above. The capacitor is charged, ignition of the spark plug is continued, and the engine does not stop.

Even if the kick pedal is depressed to start the engine and the pulse current is supplied from the pulse generator to the first transistor with the main stand retracted, the stand switch is turned off, and the emitter from the base of the second transistor Since no current flows through the second transistor, no current flows from the collector to the emitter of the second transistor, and no pulse current flows from the emitter to the collector of the first transistor.
Therefore, since no pulse current flows to the ignition coil connected to the collector of the first transistor, the spark plug does not ignite and the engine does not start.

  According to a third aspect of the present invention, the stand switch includes a switch body portion having a fixed contact and a rotating portion having a movable contact, and the switch body portion is fixed to the vehicle body frame, and the rotating portion is the main stand. It fixes to the stay extended on a main stand axis | shaft from the leg part of this.

As an action, the stay is extended from the leg portion of the main stand, and the rotating portion is fixed on the main stand shaft of the stay.
When the main stand is rotated between the standing state and the retracted state, the rotating part fixed to the stay rotates with respect to the switch body fixed to the vehicle body frame, and the movable contact is made to the fixed contact. The stand switch is turned off, or the movable switch contacts the fixed contact and the stand switch is turned on.
It is possible to rotate the rotating part simply by adding a stay to the main stand.

  In the invention according to claim 1, the main stand is provided with a stand switch that is turned off in the retracted state and turned on in the standing state. In the retracted state of the main stand, starting by the kick pedal is prohibited based on the off information of the stand switch. As the motorcycle is equipped with a mechanical kick start prevention mechanism due to interference between the main stand and the kick pedal, the design freedom is not restricted when the main stand is stored. In addition, even in a motorcycle in which it is difficult to provide a kick start prevention mechanism due to the structure, in the present invention, kick start can be electrically prevented by the stand switch and the control unit.

  In the invention according to claim 2, the control unit is provided in the circuit of the CDI device that supplies the ignition signal to the ignition plug of the engine, and the control unit includes at least the first transistor and the second transistor. The base is connected to one of the movable contact or fixed contact of the stand switch, the emitter is connected to a pulse generator that is activated by the operation of the kick pedal, the collector is connected to the ignition coil, and in the second transistor, the base is connected to the first transistor. The collector is connected to the ground, the collector is connected to the base of the first transistor, the collector of the first transistor and the base of the second transistor are connected in parallel to one end of the capacitor, and the other end of the capacitor and the stand Since the other of the movable contact or fixed contact of the switch is grounded, In the retracted state of the stand, the pulse current supplied from the pulse generator does not flow from the emitter to the collector of the first transistor by turning off the stand switch and preventing the current from flowing from the collector of the second transistor to the emitter. Thus, the kick start can be electrically prevented with a simple configuration.

  In the invention according to claim 3, the stand switch is composed of a switch main body portion having a fixed contact and a rotating portion having a movable contact, and the switch main body portion is fixed to the vehicle body frame, and the rotating portion is set to the main stand. Since the leg is fixed to a stay extending on the main stand shaft, the turning portion can be turned by simply adding the stay to the main stand, and a stand switch can be provided while suppressing an increase in cost.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a motorcycle according to the present invention. A motorcycle 10 includes a body frame 11 as a skeleton. The body frame 11 includes a head pipe 12 constituting a front end, and a diagonally downward rearward direction from the head pipe 12. A main frame 13 extending to the rear, a pair of left and right seat rails 14 and 16 (only reference numeral 14 on the near side is shown) extending obliquely rearward and upward from the rear portion of the main frame 13, and a rear end of the main frame 13 and the seat rails 14, A pair of left and right sub-frames 17 and 18 (only the reference numeral 17 on the front side is shown) for connecting the rear ends of 16 and a rear end of the main frame 13 (the connecting portion between the seat rails 14 and 16 and the main frame 13) , And a pivot plate 21 extending downward from a portion between the connecting portions of the sub frames 17 and 18 and the main frame 13.

  The motorcycle 10 is attached to the vehicle body frame 11, the steering shaft 25 rotatably supported by the head pipe 12, a bar handle 26 attached to the upper end of the steering shaft 25, and the lower end of the steering shaft 25. A front fork 27, a front wheel 28 attached to the lower end of the front fork 27, a power unit 30 supported by the lower part of the main frame 13 and the front part of the pivot plate 21, and a swing on the pivot plate 21 via a pivot shaft 32 A swing arm 33 that is freely attached, a rear wheel 34 that is rotatably attached to a rear end portion of the swing arm 33, a connection portion of the sub frames 17 and 18 to the seat rails 14 and 16, and the swing arm 33 A pair of left and right rear cushion units 36, 3 (Only the reference numeral 36 on the front side is shown), a main stand 37 rotatably attached to the lower end of the pivot plate 21, a side stand 38 rotatably attached to the lower left side of the power unit 30, and the power unit 30. And a step bar 41 attached to the bottom of the.

  The power unit 30 is a drive source including an engine 31 and a continuously variable transmission 43 integrally connected to a rear portion of the engine 31, and the engine 31 includes a cylinder portion 44 that extends substantially horizontally forward. An intake device 46 is connected to an upper portion of a cylinder head 45 constituting a part of the cylinder portion 44, and an exhaust device 47 is connected to a lower portion of the cylinder head 45.

A kick pedal 51 for starting the engine 31 is disposed on the left side of the continuously variable transmission 43.
The intake device 46 includes an intake manifold 53, a throttle body 54, a connecting tube 55, and an air cleaner 56 that are connected in order from the cylinder head 45 side.
The exhaust device 47 includes an exhaust pipe 57 and a muffler 58 connected in order from the cylinder head 45 side.

  In the figure, reference numeral 65 is a handle cover, 66 is a front body cover, 67 is a headlamp, 68 is a front fender, 71 is a seat, 72 is a side cover, 73 is a tail lamp, 74 is a rear fender, and 76 is a passenger step. is there.

  FIG. 2 is a side view showing a main part of the motorcycle according to the present invention. A pair of left and right engine hangers 81 (81 only shown) is attached to the main frame 13, and the crank provided in the power unit 30 is shown. Power unit side mounting portions 83 a, 83 b, 83 c are respectively formed on the upper portion and the rear portion of the case 83, and these power unit side mounting portions 83 a, 83 b, 83 c are attached to the engine hangers 81, 81 and the pivot plate 21.

  The continuously variable transmission 43 includes a drive pulley 86 attached to the crankshaft 85 of the engine 31, a driven shaft 87 rotatably attached to the crankcase 83, a driven pulley 88 attached to the driven shaft 87, The belt 91 is stretched over each of the drive pulley 86 and the driven pulley 88, and the output shaft 92 is connected to the driven shaft 87 via a reduction gear (not shown).

  A drive gear 93 is attached to the output shaft 92, and a chain 96 (see FIG. 1) is hung on the drive gear 93 and a driven gear 94 (see FIG. 1) provided integrally with the rear wheel 34 (see FIG. 1). Has been passed.

  The main stand 37 has a cylindrical shaft support portion 102 attached to the lower end portion of the pivot plate 21 via a support shaft 101, and a pair of left and right leg portions 103 and 104 (on the front side) extended from the shaft support portion 102. Only the reference numeral 103 is shown), and a legrest portion 106 attached to one leg portion 103 so as to extend substantially laterally, and the leg portions 103 and 104 are erected in a standing state or a state where the leg portions 103 and 104 are stowed up and stored. In order to do this, it is composed of a tension coil spring (not shown) spanned between the pivot plate 21 side and the leg 104, and FIG. 2 shows a state in which the main stand 37 is erected. At this time, as shown in FIG. Returning to FIG. 2, reference numerals 111 and 112 are connecting plates and connecting pipes that connect the left and right leg portions 103 and 104, and 113 is a reinforcing plate that is passed between the leg portion 103 and the footrest portion 106.

  A stand switch 114 for detecting whether the main stand 37 is in a standing state or in a retracted state is provided at a portion where the main stand 37 is attached to the pivot plate 21.

  The side stand 38 includes a shaft support portion 117 that is rotatably attached to a base member 115 attached to the lower left portion of the crankcase 83 via a support shaft 116, an arm portion 118 that is attached to the shaft support portion 117, a base The pin 115 provided on the member 115 and the tension coil spring 123 hung over each of the spring hook portions 122 provided on the arm portion 118, and FIG. 2 shows a retracted state in which the side stand 38 is flipped up. Yes. In addition, 118a is a bending part provided at the front-end | tip of the arm part 118, and is a part which earth | grounds.

The step bar 41 includes a pair of left and right rubber step bodies 125 and 125 (only the reference numeral 125 on the near side is shown) on which the driver puts his / her feet.
A kick shaft 127 extends from the inside of the crankcase 83 and protrudes to the left of the crankcase 83.
The kick pedal 51 includes an arm portion 131 attached to the kick shaft 127 and a pedal portion 132 attached to the arm portion 131 so as to be rotatable within a predetermined angle range.

  The kick shaft 127 is connected to the crankshaft 85 through a plurality of gears. When the kick pedal 51 is depressed, the kick shaft 127 is rotated, and the crankshaft 85 is rotated through the plurality of gears by this rotation. The engine 31 is started.

  The arm portion 131 of the kick pedal 51 includes a first bent portion 131a provided at a position close to the kick shaft 127, and a second bent portion 131b provided at a position farther from the kick shaft 127 than the first bent portion 131a. Is provided.

The first bent portion 131 a is a portion that is bent so that the heel of the foot does not interfere with the arm portion 131 when the driver places the foot on the step bar 41, specifically, the step main body 125 of the step bar 41. The second bent portion 131b is a portion provided for adjusting the position of the pedal portion 132.
The pedal portion 132 is stored so as to be substantially along a plane orthogonal to the kick shaft 127 as shown in the figure so as not to disturb the driver except when the engine is started.

FIG. 3 is a perspective view showing a mounting state of the stand switch according to the present invention. A plate-like stay 137 is attached to the upper side of the left leg 103 of the main stand 37, and the stand is attached to the side of the stay 137. A switch 114 is attached with a bolt 141.
The stand switch 114 includes a switch main body 143 and a rotating portion 144 that is rotatably attached to the switch main body 143.

  The switch main body 143 includes a connector part 143a for taking on / off information to the outside, and a pin holding part 143b for holding a rotation-preventing pin 146 protruding from the pivot plate 21 to the side. , Attached to the stay 137.

  When the main stand 37 swings between the standing state and the retracted state, the rotating portion 144 rotates together with the main stand 37 with respect to the switch main body portion 143 positioned on the pivot plate 21 via the detent pin 146. The detection unit built in the switch body 143 detects the rotation of the rotation unit 144, and the stand switch 114 is turned on in the standing state, and the stand switch 114 is turned off in the retracted state.

  FIG. 4 is a side view showing the main stand retracted state of the motorcycle according to the present invention. For example, as shown in FIG. 1, the engine 31 is started by stepping on the kick pedal 51 with the main stand 37 raised. After that, the main stand 37 is flipped up and stored in a predetermined position. That is, the rear wheel 34 is in a grounded state. With this, it is possible to shift to the traveling state of the motorcycle 10.

FIG. 5 is a plan view showing a mounting state of the stand switch according to the present invention, and shows a storing state in which the main stand 37 is flipped up.
The support shaft 101 passes through the pivot plate 102 and the shaft support portion 102 of the main stand 37, and a retaining pin 148 passes through the end of the support shaft 102, so that the main stand 37 is rotatably attached to the pivot plate 21. It has been.

  As for the stand switch 114, the rotation part 144 is attached to the leg part 103 of the main stand 37 via the stay 137, the switch main body part 143 is supported on the pivot plate 21 side, and the support shaft 101 is relatively rotatable. 137 penetrates (in other words, the stay 137 extends on the support shaft 101), and the switch main body 143 is attached to the tip of the support shaft 101 with a bolt 141.

  In the motorcycle 10 according to the present invention (see FIG. 1), the main stand 37 and the kick pedal 51 are largely separated from each other in the front-rear direction, that is, the distance L 1 (L 1 Is a distance between the support shaft 101 of the main stand 37 and the kick shaft 127), the front end 34 a of the rear wheel 34 is positioned behind the pedal portion 132 of the kick pedal 51, and the footrest portion 106 of the main stand 37 is kicked. The pedal 51 is separated by a large distance L2 in the front-rear direction, and the side stand 38 is disposed between the main stand 37 and the kick pedal 51, so that the main stand 37 and the kick pedal 51 are greatly separated in the vehicle width direction. If this is the case, it is difficult to hit the kick pedal against the footrest of the main stand as in the past.

  Therefore, in the present invention, in the motorcycle 10 (see FIG. 1) different from the scooter type motorcycle, the main stand 37 is provided with a stand switch 114 that is turned off in the retracted state. The engine start by the kick pedal 51 is prohibited based on the off information. That is, in the retracted state of the main stand 37 as shown in FIG. 4, engine start by kick is prohibited so that driving force is not transmitted to the grounded rear wheel 34.

An engine ignition control apparatus that controls ignition in the engine based on the switch information of the stand switch 114 described above will be described next.
FIG. 6 is a circuit diagram showing an engine ignition control apparatus according to the present invention.
The engine ignition control device 150 includes a pulse generator 151 that generates a pulse when the crankshaft is rotated by an operation of a kick pedal, a first transistor 153 having an emitter connected to the pulse generator 151, and the first transistor 153 A second transistor 154 having a collector connected to the base, a stand switch 114 connected to the base of the first transistor 153 and the collector of the second transistor 154, a collector of the first transistor 153, and a base of the second transistor 154 Is connected to the emitter of the second transistor 154 and grounded, the capacitor 156, the ignition coil 157 whose primary side is connected to the collector of the first transistor 153, and this Knitting Deployment coil 157 of the secondary side consists of a connected ignition plug 158 Metropolitan to CDI: a (Capacitor Discharge Ignition capacitor discharge ignition) system.

In the stand switch 114, the movable contact 114a is connected to the base of the first transistor 153, and the fixed contact 114b is grounded.
The first transistor 153 and the second transistor 154 are components that constitute the control unit 161 that controls ignition at the spark plug 158 based on on information or off information of the stand switch 114.

  As shown in FIGS. 5 and 6, the stand switch 114 is composed of the switch body 143 having the fixed contact 114b and the rotating part 144 having the movable contact 114a. 11 (see FIG. 2). Specifically, the rotation plate 144 is hung on the rotation-preventing pin 146 of the pivot plate 21, and the rotation portion 144 is supported from the leg portion 103 of the main stand 37 as a main shaft. Since it is fixed to the stay 137 extending on the 101, the rotating portion 144 can be rotated simply by adding the stay 137 to the main stand 37, and the stand switch 114 can be provided while suppressing an increase in cost.

Next, the operation of the engine ignition control device 150 described above will be described.
FIGS. 7A and 7B are first operation diagrams showing the operation of the engine ignition control device according to the present invention, and FIGS. 8A and 8B are first operations showing the operation of the engine ignition control device according to the present invention. FIGS. 9 (a) and 9 (b) are second operation diagrams and FIG. 9 (a) and FIG.
In FIG. 7A, when the main stand is raised, the movable contact 114a of the stand switch 114 comes into contact with the fixed contact 114b, and the stand switch 114 is turned on.

  When kicking by the kick pedal is started in this state, a pulse is generated by the pulse generator 151 (see FIG. 6), and when this pulse is input to the emitter of the first transistor 153 as indicated by the white arrow A, In the first transistor 153, current flows from the emitter to the base as indicated by the white arrow B.

  As a result, as shown by a white arrow C in FIG. 7B, a pulse current flows from the emitter to the collector of the first transistor 153 and is energized to the primary side of the ignition coil 157 (see FIG. 6). A high voltage is generated on the secondary side of the coil 157, the spark plug 158 (see FIG. 6) is ignited and the engine is started, and a current flows as indicated by the white arrow D to charge the capacitor 156. .

In FIG. 8A, since the current flows in the direction of the white arrow D, the current flows from the base to the emitter in the second transistor 154 as shown by the white arrow E. Current flows from the collector of the second transistor 154 to the emitter.
Accordingly, the ignition of the spark plug continues with the pulse input of the white arrow A, and the engine continues to operate.

  In FIG. 8 (b), when the main stand is flipped up during the engine rotation to stand up, the movable contact 114a of the stand switch 114 is separated from the fixed contact 114b, and the stand switch 114 is turned off. Thereafter, the capacitor 156 is discharged, and as indicated by the white arrow G, current flows from the base to the emitter in the second transistor 154.

  As a result, as shown by the white arrow H in FIG. 9A, the pulse input to the first transistor 153 causes the emitter from the emitter of the first transistor 153 to pass through the base and the collector of the second transistor 154 through the emitter. A current flows as indicated by a white arrow J.

  Accordingly, as indicated by the white arrow K in FIG. 9B, a pulse current flows from the emitter to the collector of the first transistor 153, and this current is supplied to the ignition coil so that the spark plug is ignited and the engine is operated. Will continue.

  Also at this time, the capacitor 156 is charged by the current indicated by the white arrow L, discharged after charging, and the current flows from the base of the second transistor 154 to the emitter as indicated by the white arrow M.

  Returning to FIG. 4, when the engine is started by kick, if the main stand 37 is in the retracted state, the stand switch 114 is off as shown in FIG. Even when a pulse is input to the transistor 153, no current flows from the base to the emitter of the second transistor 154 (that is, the second transistor 154 is also off), so no current flows from the emitter to the base of the first transistor 153. .

  Accordingly, since no pulse current flows from the emitter to the collector of the first transistor 153, no current flows to the ignition coil. As a result, since the spark plug 158 does not ignite, the engine does not start, and the driving force is not transmitted to the rear wheel 34 shown in FIG.

  Thus, in the present invention, as shown in FIG. 6, the engine ignition control device 150 includes the stand switch 114 and the control unit 161, so that the engine is started by the kick when the main stand 37 is in the retracted state. Even when the main stand 37 is in the standing state, the engine can be started by a kick and the engine can be stopped even when the main stand 37 is retracted in the engine operating state. Can be prevented.

  As shown in FIGS. 1, 3, and 6, the present invention relates to the vehicle body frame 11, more specifically, the main stand 37 on the pivot plate 21 in an upright state and a retracted state in which the main stand 37 is flipped up from the upright state. In the kick start type motorcycle 10 that is rotatably mounted and starts the engine 31 by kicking the kick pedal 51, the main stand 37 is provided with a stand switch 114 that is turned off in the retracted state and turned on in the standing state. In the retracted state of the main stand 37, the control unit 161 is provided to prohibit the start by the kick pedal 51 based on the off information of the stand switch 114. Therefore, when the main stand 37 is retracted, the main stand 37 and the kick pedal 51 are Design freedom, like a motorcycle with a mechanical kick start prevention mechanism by interference , Without being restricted to the addition, the structure, even in a motorcycle is difficult to provide a kick start blocking mechanism, in the present invention, it is possible to prevent the electrically kick starting the stand switch 114, and a control unit 161.

  Further, in the present invention, as shown in FIG. 6, a control unit 161 is provided in a circuit of an engine ignition control device 150 as a CDI device that supplies an ignition signal to a spark plug 158 of an engine 31 (see FIG. 2). The controller 161 includes at least a first transistor 153 and a second transistor 154. In the first transistor 153, the base is connected to one of the movable contact 114a and the fixed contact 114b of the stand switch 114, and the emitter is kick pedal 51 (see FIG. 2), the collector is connected to the ignition coil 157, the base of the second transistor 154 is connected to the collector of the first transistor 153, the emitter is grounded, and the collector is connected to the first Connected to the base of one transistor 153 and connected to the first transistor Since the collector of the star 153 and the base of the second transistor 154 are connected in parallel to one end of the capacitor 156, the other end of the capacitor 156 and the other of the movable contact 114a or the fixed contact 114b of the stand switch 114 are grounded. In the retracted state of the stand 37, the stand switch 114 is turned off and no current flows from the collector of the second transistor 154 to the emitter, whereby the pulse current supplied from the pulse generator 151 is changed to the emitter of the first transistor 153. Therefore, the kick start can be electrically prevented with a simple configuration.

  In the present embodiment, as shown in FIG. 3, the stand switch 114 is composed of the switch main body 143 and the rotating portion 144. However, the present invention is not limited to this, and the stand switch is in an upright state of the main stand 37. It may be configured with a push switch that is turned on by hitting a part of the main stand.

  The present invention is suitable for motorcycles other than the scooter type.

1 is a side view of a motorcycle according to the present invention. 1 is a side view showing a main part of a motorcycle according to the present invention. It is a perspective view which shows the attachment state of the stand switch which concerns on this invention. FIG. 3 is a side view showing a main stand retracted state of the motorcycle according to the present invention. It is a top view which shows the attachment state of the stand switch which concerns on this invention. It is a circuit diagram which shows the engine ignition control apparatus which concerns on this invention. It is a first operation diagram showing the operation of the engine ignition control device according to the present invention. It is a 2nd operation | movement figure which shows the effect | action of the engine ignition control apparatus which concerns on this invention. It is a 3rd operation | movement figure which shows the effect | action of the engine ignition control apparatus which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Body frame, 31 ... Engine, 37 ... Main stand, 51 ... Kick pedal, 101 ... Main stand axis | shaft (support axis), 103 ... Leg part, 114 ... Stand switch, 114a ... Movable contact, 114b ... fixed contact, 137 ... stay, 143 ... switch body, 144 ... rotating part, 150 ... CDI device (engine ignition control device), 151 ... pulse generator, 153 ... first transistor, 154 ... second transistor, 156 ... Capacitor, 157 ... ignition coil, 161 ... control unit.

Claims (3)

In the kick start type motorcycle in which the main stand is pivotally attached to the body frame in a standing state and a retracted state that is flipped up from the standing state, and the engine is started by kicking the kick pedal.
The main stand is provided with a stand switch that is turned off in the retracted state and turned on in the standing state,
A kick start type motorcycle having a control unit for prohibiting start by the kick pedal based on off information of the stand switch when the main stand is retracted. The control unit is provided in a circuit of a CDI device that supplies an ignition signal to the ignition plug of the engine, and the control unit includes at least a first transistor and a second transistor,
The first transistor has a base connected to one of a movable contact or a fixed contact of the stand switch, an emitter connected to a pulse generator that operates by operating the kick pedal, a collector connected to an ignition coil,
The second transistor has a base connected to the collector of the first transistor, an emitter grounded, a collector connected to the base of the first transistor,
The collector of the first transistor and the base of the second transistor are connected in parallel to one end of a capacitor, and the other end of the capacitor and the other movable contact or fixed contact of the stand switch are grounded. The kick start type motorcycle according to claim 1.   The stand switch includes a switch body portion having a fixed contact and a rotating portion having a movable contact. The switch body portion is fixed to the vehicle body frame, and the rotating portion is connected to the main stand. 2. The kick starter motorcycle according to claim 1, wherein the kick starter motorcycle is fixed to a stay extending from a leg portion onto a main stand shaft.

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