JPH1122611A - Lamp voltage adjuster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp voltage adjuster which can suppress magnetic friction to a low level. SOLUTION: This lamp voltage adjuster is equipped with a switch means 91 which is interposed in a closing circuit between an alternating current generator 116 and a lamp load 30, charging/discharging means 92, 93 which are arranged in parallel to the lamp load 30, charged by the output of the alternating current generator 116 when the switch means 91 is short-circuited, to execute self-discharge and control means. In this case, the control means compares a predetermined voltage based on the output voltage of the alternating current generator 116 with the charging voltage of the charging/discharging means 92, 93, and when the charging voltage is larger than the predetermined voltage, it releases the switching means 91, and when the charging voltage becomes smaller than the predetermined voltage by discharge, it short-circuits the switching means 91.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage regulator for supplying power to a lamp load by an AC generator provided in an internal combustion engine of a vehicle or the like.

[0002]

2. Description of the Related Art Electric power generated by an AC generator is used not only for charging a battery but also for a load such as a lamp.
The power to the lamp load is supplied by adjusting the voltage to protect the lamp, but a conventional example (Japanese Patent Publication No. 4-63640).
5 is described with reference to FIG.

A lamp 02 is connected in parallel to a power generating coil 01 via a lighting switch 03, and a thyristor 04 is also connected in parallel. A resistor 06 and a capacitor 07 are connected in parallel between output terminals of a full-wave rectifier circuit 05 connected to both ends of the power generation coil 01. One end is connected to the base terminal of the transistor 08 and the other end is connected to the emitter terminal.

The collector terminal of the transistor 08 is connected to a resistor 09
Is connected to one end of the power generating coil 01 (cathode terminal of the thyristor 04) and to the trigger terminal of the thyristor 04. Therefore, in the positive voltage cycle of the power generation AC voltage of the power generation coil 01 with the lighting switch 03 turned on, the current flows through the lamp 02 with the thyristor 04 turned off to light up.

In the negative voltage cycle of the generator coil 01, the thyristor 04 is initially turned off and the lamp 02 is energized.
When the output rectified wave of the full-wave rectifier circuit 05 is smoothed and delayed by the resistor 06 and the capacitor 07 and the transistor 08 is turned on, a pulse is input to the trigger terminal of the thyristor 04 and the thyristor 04 is turned on to stop energizing the lamp 02. . That is, energization is limited by the negative voltage cycle to adjust the voltage applied to the lamp 02.

[0006]

As described above, in the prior art, the current applied to the lamp is adjusted by applying the current flowing through the lamp to the switch means by turning on the switching means of the thyristor 04. .

In the closed circuit of the current flowing when the thyristor 04 is conducting, a large short-circuit current flows because the power generated in the power generation coil 01 is consumed by the extremely small resistance of the power generation coil 01 and the thyristor 04. This large short-circuit current becomes magnetic friction and deteriorates fuel efficiency.

In particular, in a system in which the engine is stopped every time the vehicle is stopped and the starter motor is turned for each starter, the necessity of ensuring the starting torque and the need to increase the charge capacity of the battery each time are caused by the necessity of using a neodymium type AC generator. A magnet having a large holding force, such as a magnet, is used. In such a case, the short-circuit current increases, the magnetic friction increases, and the fuel consumption deteriorates.

[0009] The present invention has been made in view of such a point,
An object of the present invention is to provide a lamp voltage regulator capable of suppressing magnetic friction.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a switch provided in a closed circuit between an AC generator and a lamp load, and a switch provided in parallel with the lamp load. A charging / discharging unit that is charged by the output of the AC generator when the switch unit is short-circuited and then performs self-discharge, and compares a predetermined voltage based on an output voltage of the AC generator with a charging voltage of the charging / discharging unit. And a lamp voltage adjusting device comprising a control means for opening the switch means when the charge voltage is higher than the predetermined voltage, and short-circuiting the switch means when the charge voltage becomes lower than the predetermined voltage due to discharge.

A switch means is interposed in a closed circuit between the AC generator and the lamp load. When the switch means is short-circuited, the lamp load is energized and lit, and when the switch means is opened, the lamp load is not energized. The charging / discharging means provided in parallel with the load is charged when the switch means is short-circuited,
When it is opened, it discharges, and when its charged voltage becomes lower than a predetermined voltage, the switch means is short-circuited to energize the lamp load.

Therefore, when the switch means is short-circuited, the short-circuit current of the alternator flows to the lamp load to light the lamp, so that the short-circuit current does not increase and the magnetic friction is suppressed to lower the fuel efficiency. Absent.

According to a second aspect of the present invention, in the lamp voltage adjusting apparatus according to the first aspect, when the charging voltage is higher than the predetermined voltage and the switch is in an open state, the output current of the AC generator is reduced. This is a configuration in which a predetermined resistance means flows.

When the switch means is opened, the output current of the AC generator flows through a predetermined resistance means so that a large current does not flow. Even when the switch means is opened, the magnetic friction is suppressed small.

According to a third aspect of the present invention, in the lamp voltage adjusting apparatus according to the first aspect, the control means has a constant voltage means for maintaining a predetermined voltage based on an output voltage of the AC generator. It is characterized by.

The constant voltage means maintains a predetermined voltage based on the output voltage of the alternator, and the charging voltage of the charging / discharging means becomes smaller than the predetermined voltage, and the voltage applied to the lamp is adjusted by the timing of short-circuiting the switch means. it can.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to FIGS. FIG. 1 shows an overall side view of a scooter type motorcycle provided with a lamp voltage adjusting device according to the present embodiment. This scooter type motorcycle 1 is equipped with a two-stroke internal combustion engine.

The vehicle body front part 2 and the vehicle body rear part 3 are connected via a low floor part 4, and the vehicle body frame which forms the skeleton of the vehicle body generally comprises a down tube 6 and a main pipe 7.

A fuel tank and a storage box are supported by the main pipe 7, and a seat 8 is disposed above the fuel tank and the storage box. On the other hand, in the front portion 2 of the vehicle body, a handle 11 is provided above and supported by the steering head 5, a front fork 12 extends below, and a front wheel 13 is supported at its lower end.

A lamp 30 is disposed in front of the center of the handle 11, and an accelerator grip 61 (see FIG. 3) is provided on the right handle 11.
Is provided. A bracket 15 protrudes from the lower end of the rising portion of the main pipe 7, and a swing unit 17 is swingably connected to and supported by the bracket 15 via a link member 16.

The swing unit 17 is provided with a single-cylinder two-stroke internal combustion engine 200 at the front portion thereof.
A belt-type continuously variable transmission 35 is configured from 200 to the rear, and a rear wheel 21 is supported by a reduction mechanism 38 provided at a rear portion thereof via a centrifugal clutch. A rear cushion is provided between the upper end of the speed reduction mechanism 38 and the upper bent portion of the main pipe 7.
22 are interposed.

An upper part of the swing unit 17 is provided with an internal combustion engine.
A carburetor 24 connected to an intake pipe 23 extending from the upper part of the cylinder head 200 and an air cleaner 25 connected to the carburetor 24 are provided.

On the other hand, the hanger bracket 18 protruding from the lower part of the unit swing case 31 is attached to the main stand 26.
The base end of a kick arm 28 is fixed to a kick shaft 27 protruding from a transmission case cover 36 of a belt-type continuously variable transmission 35, and a kick pedal is attached to a tip of the kick arm 28.
29 are provided.

FIG. 2 shows the internal combustion engine 200 shown in FIG.
It is sectional drawing cut | disconnected along the line. The internal combustion engine 200 has a cylinder block 203 and a cylinder head 204 which are sequentially combined with a crankcase 202 combining a left and right case rotatably supporting a crankshaft 201 oriented horizontally in the left and right directions. The cylinder block 203 has an exhaust passage (not shown). In addition to the scavenging passage opening from the cylinder bore to the scavenging passage 20
5 are formed and communicate with the crankcase of the crankcase 202.

The cylinder head 204 has a spark plug 206
Is fitted toward the combustion chamber, and the cylinder head 204 and the cylinder block 203 are removed except for the exposed portion of the ignition plug 206.
Is covered with a fan shroud 207.

The left crank case 202L also serves as a belt type continuously variable transmission case, and the left crank case 202L
The belt drive pulley has a crankshaft 201
Both 210 are provided rotatably.

The belt drive pulley 210 is composed of a fixed pulley half 210L and a movable pulley half 210R. The fixed pulley half 210L is fixed to the left end of the crankshaft 201 via a boss 211, The movable pulley half 210R is spline-fitted to the crankshaft 201, and the fixed pulley half 210L
Can move toward and away from the two pulley halves 210L, 210R
The V-belt 212 is sandwiched and wound around.

A cam plate 215 is fixed to the crankshaft 201 on the right side of the movable pulley half 210R, and a slide piece 215a provided on the outer peripheral end thereof is formed on the outer peripheral end of the movable pulley half 210R in the axial direction. Cam plate sliding boss 210R
a is slidably engaged with a.

Cam plate 215 of movable pulley half 210R
The side surface is tapered toward the cam plate 215 side, and a dry weight roller 216 is housed between the cam plate 215 inside the tapered surface.

Therefore, when the rotation speed of the crankshaft 201 increases, the dry weight roller 216 which rotates between the movable pulley half 210R and the cam plate 215 rotates together.
It moves in the centrifugal direction by centrifugal force, and the movable pulley half 210R
Is pressed by the same dry weight roller 216 and moves to the left to approach the fixed pulley half 210L.
The V-belt 212 sandwiched between the L and 210R is moved in the centrifugal direction to increase the winding diameter.

A V-belt 212 is wound around a belt driven pulley (not shown) corresponding to the belt driving pulley 210, the power is automatically adjusted and transmitted to a rear reduction mechanism or the like via a centrifugal clutch. Drive wheels.

The transmission case cover 220, which covers the belt-type continuously variable transmission chamber from the left side,
0, the kick shaft 27 is rotatably penetrated and supported forward, and a drive helical gear 222 is fitted to the inner end of the kick shaft 27, and a return spring 223 is provided. Powered by

A sliding shaft 224 is rotatably and axially slidably supported on the front inner surface of the transmission case cover 220 coaxially with the crankshaft 201, and the driven helical gear 225 is mounted on the sliding shaft 224. The drive helical gear 22 is formed
2 and a ratchet wheel 226 is fixed to the right end.
Biased to the left by On the other hand, a ratchet is formed on the boss 211 on the side of the crankshaft 201 so as to face the ratchet wheel 226, and both can be brought into contact with and separated from each other by sliding the sliding shaft 224.

Therefore, the kick pedal 29 is depressed,
When the kick shaft 27 rotates against the return spring 223, the drive helical gear 222 rotates integrally with the kick shaft 27, and the driven helical gear 225 meshing therewith moves the sliding shaft 224.
The ratchet wheel 226 slides to the right against the friction spring 227 while rotating integrally with the
The internal combustion engine 200 can be started by meshing with the first ratchet and forcibly rotating the crankshaft 201.

On the other hand, the right crankcase 202R has a crankshaft.
The main bearing 209 rotatably supports the main shaft 201 and extends in a substantially cylindrical shape on the right side, and the crankshaft 201 protrudes from the center axis thereof. A starter / generator 110 combining a starter motor and an AC generator is disposed in the cylinder of the right crankcase 202R.

An inner rotor (rotating inner magnet type rotor) 111 is fitted into the tapered end of the crankshaft 201 and a nut 113
To rotate together. The inner rotor 111 has six circular arc-shaped grooves formed on the outer peripheral surface, and a magnet 112 made of neodymium iron boron is formed in each groove.
Is fitted.

The outer stator 115 disposed around the outer periphery of the inner rotor 11
The cylindrical member 202 is supported by being screwed to a cylindrical wall 202a by a bolt 119. The stator core of the outer stator 115 has a power generating coil 116 and a starting coil 117 wound around a plurality of yokes formed by laminating thin steel plates and extending in the center direction from an annular portion on the outer peripheral edge.

The generating coil 116 and the starting coil 117 projecting inward in the axial direction inside the cylindrical wall 202a of the crankcase 202,
An inner space is formed inside the ring and a rectifying brush mechanism 120 is formed in the inner space.

The brush holder 121 penetrated by the crankshaft 201 in the same internal space is fitted so as to prohibit relative rotation in the circumferential direction with respect to the crankshaft 201 and allow only sliding in the axial direction. A spring 123 is interposed between the inner rotor 111 and the brush holder 121, and the brush holder 121 is urged inward in the axial direction.

On the inner side surface of the brush holder 121, brushes 122 are urged by springs to project at a plurality of predetermined locations. A commutator holder 125 is fixed to and supported by a portion of a power generating coil 116 and a starting coil 117 which penetrate the center through the crankshaft 201 and project the outer peripheral edge inward in the axial direction so as to face the inner surface of the brush holder 121. I have.

The brush holder 121 of the commutator holder 125
A commutator piece 126 is concentrically arranged at a predetermined position on the surface opposite to the surface. The brush holder 121 rotating together with the crankshaft 201 approaches and separates from the fixed commutator holder 125, and when approaching, the brush 122 contacts a required commutator piece 126.

On the other hand, the outer side of the inner rotor 111 in the crankshaft direction is provided with a nut 113 screwed to the tip of the crankshaft 201.
An inner cylindrical portion 131 covering the periphery of the outer peripheral portion and a concentric outer cylindrical portion 132 covering the outer side extend axially outward, and the governor mechanism 130 is formed here.

That is, the outer cylindrical portion 132 forms a governor outer with a tapered inner peripheral surface, and is slidable in the axial direction on the outer periphery of the inner cylindrical portion 131 in the axial direction.
3 is fitted, and a ball 134 as a governor weight is interposed between the inner governor 133 and the outer cylindrical portion 132.

A connecting shaft 135 having one end fixed to a governor inner 133 sliding in the axial direction of the governor mechanism 130 passes through the inner rotor 111 in parallel with the crankshaft 201,
The tip is fitted on the brush holder 121. Connection shaft 135
Are connected to the inner governor 133 and the brush holder 121 so as to be integrally movable with each other in the crankshaft direction.

When the crankshaft 201 is stopped, FIG.
The brush holder 121 is moved inward in the axial direction by the urging force of the spring 123, and the brush 122 is in contact with the commutator piece 126, as shown in FIG. The internal combustion engine 1 can be started by rotating the crankshaft 201 by rotating the crankshaft 201 by flowing to the starting coil 117 through the contact with the piece 126 to generate a rotational torque in the inner rotor 111.

When the engine speed increases, the ball 134 moves in the outer peripheral direction on the tapered inner surface of the outer cylindrical portion 132 by centrifugal force, so that the governor inner 133 slides outward in the axial direction. When the brush holder 121 also moves outward in the axial direction and exceeds a predetermined number of rotations, the brush 122
Automatically separates from the commutator strip 126, after which the generator coil 11
6 generates power, charges the battery and turns on the lamp.

Outer cylindrical portion constituting the governor mechanism 130
132 at the edge of the ring-shaped rotor 14 for detecting the crank angle.
Numeral 0 is provided integrally with the inner peripheral edge of the rotor 140, and a pulsar 141 is fixed to the crankcase 202 in the vicinity of the outer peripheral edge of the rotor 140 and is disposed at a predetermined position.

The pulser 141 detects a notch formed on the outer peripheral edge of the rotor 140 which rotates integrally with the crankshaft 201 via the inner rotor 111 and determines the crank angle. The ring-shaped rotor 140 covers the power generating coil 116 and the starting coil 117 of the outer stator 115 from outside.

A fan member 145 for forced air cooling of the internal combustion engine is integrally provided outside the rotor 140 in the axial direction.
The fan member 145 has its central conical portion 145a fixed to the outer cylindrical portion 132 of the inner rotor 111 with bolts 146 at the skirt portion.
It is structured to stand outside of 140.

The fan member 14545 is covered with a fan cover 148. The fan cover 148 has an outside air inlet 148a formed outside the fan member 145, and constitutes a guide wall 148b for guiding the intake air toward the cylinder block 203 and the cylinder head 204.

Vehicle starting and power generating apparatus according to this embodiment
110 has the above structure, and the inner rotor 11
1, a rectifying brush mechanism 120 is arranged on the inner side in the axial direction, and the governor mechanism is separated from the rectifying brush mechanism 120 on the outer side in the axial direction.
130 are arranged.

A start control system in the internal combustion engine 200 having the start / generator 250 for directly rotating the crankshaft 201 as described above is shown and described in FIG. FIG. 3 also shows a charging circuit 80 for charging the battery 50 and a lamp voltage adjusting circuit 90 for lighting the lamp 30, and such a circuit will be described later.

The positive terminal of the battery 50 is connected to the ignition stop means 70 and one fixed contact 62a of the throttle switch 62 of the power supply means 60 via the combination switch 51 and to one contact 63a of the starter magnet switch 63 of the power supply means 60. It is connected.

The throttle switch 62 is provided on the accelerator grip 61, and has a fixed contact 62a and an accelerator grip 62.
It consists of an arc-shaped contact 62b that rotates with 61
62a and 62b are off when the throttle is fully closed, and are on otherwise. The arc contact 62b is connected to the electromagnetic coil 63c of the starter magnet switch 63, and the other end of the electromagnetic coil 63c is grounded via the brake switch 64.

Other contacts of the starter magnet switch 63
63b is connected to the conductive path of the starter / generator 110 and to one input terminal of the NOR circuit 71 of the ignition stopping means 70.

That is, the power supply means 60 turns on the combination switch 51 to apply the brake, and
When the accelerator grip 61 is rotated to release the slot fully closed when the switch 64 is turned on, a current flows through the electromagnetic coil 63c and the starter magnet switch 63 conducts to supply power to the starter / generator 110. The ignition stop means 70 is driven by the
An H (high) level signal is output to one input terminal of the circuit 71.

Therefore, there is no starter button and the internal combustion engine can be started immediately by turning the accelerator grip 61 with the brake applied, and the start is not performed in any other state.

On the other hand, a signal indicating the presence or absence of rotation of the rear wheel 21, that is, whether the vehicle speed is zero, which is detected by the vehicle speed sensor 53, is input to the other input terminal of the NOR circuit 71 of the ignition stopping means 70. An L (low) level signal is input, and if the vehicle speed is not zero, an H level signal is input.

The output of the NOR circuit 71 is input to one input terminal of the next-stage NAND circuit 72, and the other input terminal of the NAND circuit 72 is supplied with an on-off signal of the bi-starter 54 mounted on the vaporizer 24, that is, a warm-up signal. A signal indicating whether the warm-up operation has been completed is input. If the warm-up operation has not been completed, an L-level signal is input. If the warm-up operation has been completed, an H-level signal has been input. An output terminal of this NAND circuit 72 is a transistor 73
Is connected to the base terminal.

The transistor 73 of the ignition stopping means 70 has a collector terminal connected to the combination switch 51 and an emitter terminal connected to the CDI (capacitive discharge ignition) unit 52.
The output of the CDI unit 52 is connected to an ignition coil 53 for operating a spark plug 206.

The ignition stopping means 70 is constructed as described above, and operates when the throttle opening is fully closed and the vehicle speed is zero.
An L level signal is input to both of the two input terminals 71, and an H level signal is output to the NAND circuit 72.
When the warming-up operation is completed, an H-level signal is input to the other input terminal of the NAND circuit 72.
An L level signal is output from the ND circuit 72 and the transistor 73
Becomes low level, the power supply current does not flow through the CDI unit 52, and the ignition is stopped.

If at least one of the throttle opening is fully closed, the vehicle speed is zero, and the warm-up operation is completed, the output of the NAND circuit 72 becomes H level, the transistor 73 is turned on, and the ignition is enabled. .

Since the present start control system is configured as described above, when the motorcycle 1 stops after traveling,
When the throttle opening is fully closed by operating the accelerator grip 61 and the brake is applied and stopped, the vehicle speed becomes zero, and the warm-up operation has already been completed, so the ignition is stopped by the ignition stop means 70 to operate the internal combustion engine. Is stopped. Even when the vehicle is temporarily stopped at a traffic light or the like, the operation of the internal combustion engine is stopped, and wasteful consumption of fuel can be avoided.

When the throttle is opened by operating the accelerator grip 61 while the brake is applied (the brake switch 64 is on), the starter magnet switch 63 is turned on and the starting coil of the starting / generator 110 is started. 11
7 to be driven as a starter motor to start the engine.
An H level signal is output to the input terminal to turn on the transistor 73 to ignite the ignition plug 206 and start the internal combustion engine 200.

The starting / generator 110 is directly connected to the crankshaft 20.
Since the engine 1 is rotated to start the engine, the internal combustion engine 200 can be started smoothly by rotating the crankshaft 201 instantly and without noise.

When the internal combustion engine 200 is started and the crankshaft 201 exceeds a predetermined number of revolutions, the supply of power to the starter / generator 110 is stopped by the governor mechanism, and the engine speed is instantaneously increased to the throttle opening according to the accelerator operation. Number rises.

As described above, simply by operating the accelerator grip 61 after the temporary stop, the internal combustion engine 200 starts and the engine speed increases, so that the centrifugal clutch on the rear wheel 21 side is also connected, and the brake is released. You can start immediately.
That is, even if the operation of the internal combustion engine 200 is stopped every time the vehicle is stopped to avoid wasting fuel, the vehicle can be started immediately and smoothly by a simple operation.

The ignition stopping means 70 stops the ignition when the throttle opening is fully closed, the vehicle speed is zero, and the warm-up operation is completed, such as when the engine is temporarily stopped. If the engine operation is necessary, the ignition is continued until the warm-up operation is completed, and the operation of the internal combustion engine is not stopped.

In the above-described start control system, since it is necessary to increase the charge capacity of the battery 50 only by rotating the starter motor at every start, the magnet 112 of the starter / generator 110 is made of neodymium iron boron having a strong holding force. Has adopted.

The generating coil 11 of the starting and generating device 110
The charging circuit 80 for charging the battery 50 by the power supply 6 includes a thyristor 81 connected to the downstream end of the combination switch 51 via a thyristor 81, and a diode 82 and a resistor 83 connected in series. The connection between the diode 82 and the resistor 83 is grounded via a diode 84 and a Zener diode 85.

Accordingly, the charging circuit 80 charges the battery 50 in a positive voltage cycle by half-wave rectifying the AC power generated by the power generation coil 116 to a predetermined voltage while the combination switch 51 is on.

Next, the lamp voltage adjusting circuit 90 for lighting the lamp 30 will be described. One end of the lamp 30 is connected to the cathode terminal of the thyristor 91 whose anode side is grounded, and the other end of the lamp 30 is connected to the generating coil 116 of the starting and generating device 110, and the generating coil 116, the thyristor 91 and the lamp 30 are closed. Make up the circuit.

A resistor 94 and a diode 95 are respectively connected at both ends of a charging / discharging means in which a resistor 92 and a capacitor 93 are connected in parallel. The resistor 94 and the diode 95 are connected in parallel to the lamp 30. A diode 96, a diode 97, and a resistor 98 are sequentially connected in series, and the resistor 98 is grounded. The other end of the resistor 98 whose one end is grounded is connected to the gate terminal of the thyristor 91 via a diode 99.

The lamp voltage adjusting circuit 90 is configured as described above, and the AC voltage V (see FIG.
In the positive voltage cycle, the thyristor 91 is turned off and no current flows through the lamp 30 so that the lamp is not lit. Also, the diode 95 cuts off the current in the charging / discharging means in which the resistor 92 and the capacitor 93 are connected in parallel, and is not charged.

When the first negative voltage cycle starts, a forward voltage is applied to the thyristor 91 and a trigger voltage is applied to the gate terminal of the thyristor 91 through the resistor 98 and the diode 99. It is energized and turned on (the hatched portion L1 in FIG. 4). When the thyristor 91 is turned on, the resistor 92 and the capacitor 93 are simultaneously
Are also connected to the charging / discharging means connected in parallel, and the capacitor 93 is charged.

In the next positive voltage cycle, the thyristor 91 is turned off, and the lamp 30 is not energized. The positive current is a diode
It is cut off by 95 and does not affect the charging / discharging means.
93 is discharged through the resistor 92.

In the next negative voltage cycle, the reverse voltage is applied to the thyristor 91 while the charging voltage of the capacitor 93 of the charging / discharging means is higher than the predetermined voltage of the Zener diode 96, and the thyristor 91 is kept off. During that time, the current is
8, diode 97, zener diode 96, diode 9
Flow 5 sequentially. This current flows through a relatively large resistor 98, the current value is small, and the power consumption is extremely small.

When the charging voltage of the capacitor 93 of the charging / discharging means becomes lower than the predetermined voltage of the Zener diode 96 by discharging, the trigger voltage is applied to the gate terminal of the thyristor 91 via the resistor 98 and the diode 99.
The lamp 91 is turned on to energize the lamp 30 (the hatched portion L2 in FIG. 4).

As described above, the lamp voltage adjusting circuit 90 employs a configuration in which the lamp 30 is energized and turned on when the thyristor 91 is on, and the on-timing of the thyristor 91 is controlled by the charging / discharging means and the Zener diode 96. Voltage adjustment.

The scooter type motorcycle 1 employs a start control system which stops the internal combustion engine when the vehicle stops running and rotates the starter motor at each start. Therefore, the magnet 112 of the starter / generator 110 has a holding force. Because it uses strong neodymium iron boron, the power generation coil 11
6 tends to increase the magnetic friction due to the short-circuit current, but this lamp voltage adjustment circuit 90
Since the short-circuit current when the switch 91 is turned on flows into the lamp 30 to light the lamp, the short-circuit current does not increase and the magnetic friction is suppressed to prevent deterioration of fuel efficiency.

When the thyristor 91 is off, the power generation coil 11
The current flowing through the lamp voltage adjustment circuit 90 is
And the current value is small, and also in this case, the magnetic friction is small and does not affect fuel efficiency. As described above, the lamp voltage adjusting circuit 90 is a very effective means for a system having a start control system for rotating the starter motor at each start.

[Brief description of the drawings]

FIG. 1 is an overall side view of a scooter-type motorcycle provided with a lamp voltage regulator according to an embodiment of the present invention, with a part thereof omitted.

FIG. 2 is a cross-sectional view of the internal combustion engine mounted on the scooter type motorcycle in FIG. 1, taken along line II-II.

FIG. 3 is a schematic configuration diagram of a start control system.

FIG. 4 is a diagram showing a waveform of a voltage applied to a lamp.

FIG. 5 is a diagram showing a conventional lamp voltage adjustment circuit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Scooter type motorcycle, 2 ... Body front part, 3 ... Car body rear part, 4 ... Floor part, 6 ... Down tube, 7 ... Main pipe, 8 ... Seat, 11 ... Handle, 12 ... Front fork, 13 ... Front wheel, 15… Bracket, 16… Link member, 17…
Swing unit, 18 hanger bracket, 21 rear wheel, 22 rear cushion, 23 intake pipe, 24 carburetor, 25
... Air cleaner, 26 ... Main stand, 27 ... Kick shaft,
28 ... Kick arm, 29 ... Kick pedal, 30 ... Ramp, 50
... Battery, 51 ... Combination switch, 52 ... CD
I unit, 53: ignition coil, 54: bi-starter, 60: power supply means, 61: accelerator grip, 62: throttle switch, 63: starter magnet switch, 64
... brake switch, 70 ... ignition stop means, 71 ... NOR circuit, 72 ... NAND circuit, 73 ... transistor, 80 ... charging circuit, 81 ... thyristor, 82 ... diode, 83 ... resistor, 84 ...
Diode, 85 Zener diode, 90 Lamp voltage adjustment circuit, 91 Thyristor, 92 Resistor, 93 Capacitor, 94 Resistor, 95 Diode, 96 Zener diode, 97 Diode, 98 Resistor, 99 Diode , 110
... Vehicle starter and generator, 111 ... Inner rotor, 112
... Magnet, 113 ... Nut, 115 ... Outer stator, 116 ... Generating coil, 117 ... Starting coil, 120 ... Rectifying brush mechanism, 121 ... Brush holder, 122 ... Brush, 12
3 ... Spring, 125 ... Commutator holder, 126 ... Commutator piece, 130 ... Governor mechanism, 131 ... Inner cylindrical part, 132 ... Outer cylindrical part, 133 ... Governor inner, 134 ... Ball, 135 ...
Connection shaft, 140 ... rotor, 141 ... pulser, 145 ... fan member, 146 ... bolt, 148 ... fan cover, 200 ... internal combustion engine, 201 ... crankshaft, 202 ... crankcase, 203
... cylinder block, 204 ... cylinder head, 205 ... scavenging passage, 206 ... spark plug, 210 ... belt drive pulley,
211 ... boss, 212 ... V belt, 215 ... cam plate, 21
6… Dry weight roller, 220… Eviction case cover,
222 ... drive helical gear, 223 ... return spring,
224: sliding shaft, 225: driven helical gear, 226: ratchet wheel, 227: friction spring.

Claims (3)

[Claims] 1. A switch means interposed in a closed circuit between an AC generator and a lamp load, and a switch means provided in parallel with the lamp load and charged by an output of the AC generator when the switch means is short-circuited. Charging / discharging means for discharging, comparing a predetermined voltage based on an output voltage of the AC generator with a charging voltage of the charging / discharging means, and setting the switch means to an open state when the charging voltage is higher than the predetermined voltage; A lamp voltage adjusting device, comprising: control means for short-circuiting the switch means when a charging voltage becomes lower than the predetermined voltage due to discharging. 2. The configuration according to claim 1, wherein the output current of the alternator flows through a predetermined resistor when the charging voltage is higher than the predetermined voltage and the switch is in an open state. The lamp voltage regulator according to the above. 3. The lamp voltage regulator according to claim 1, wherein said control means includes a constant voltage means for maintaining a predetermined voltage based on an output voltage of said AC generator.