JPH1081284A - Controller of grip built-in heater for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a good temperature sensing feeling by reliably preventing a battery from being dead and by enabling stable heating of a grip, in a controller of the grip built-in heater for a vehicle, provided with a switching means for switching supply of electric power from the battery to the heater and a driving signal outputting means for outputting a driving signal for operating the switching means. SOLUTION: When the voltage corresponding to the power supply voltage to be output from a battery 84 is less than the first voltage threshold value, output of a driving signal of a driving signal outputting means 43 is prohibited by a power supply voltage monitoring means 44, while, when the voltage is not less than the second voltage threshold value higher than the first voltage threshold value, output of the driving signal of the driving signal outputting means 43 is permitted by the power supply voltage monitoring means 44. When the required minimum power supply voltage in the battery 84 is taken as VM, the voltage drop is taken as ΔV1 and the maximum voltage detected error on the plus side is taken as ΔV2 , the first voltage threshold value is set as (VM-ΔV1 +ΔV2 ).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a heater with a built-in grip for a vehicle applied to vehicles such as motorcycles, snowmobiles, and three-wheel buggies.

[0002]

2. Description of the Related Art Conventionally, such a heater with a built-in grip for a vehicle is disclosed in, for example, Japanese Utility Model Publication No. Hei 7-48463,
It is already well known in JP-A-26164 and JP-A-8-26165.

[0003]

The heating of the grip by the heater with a built-in grip for the vehicle is incidental to the running of the vehicle, and in order to give priority to the running of the vehicle, the power from the battery to the heater is increased. The power supply must be stopped when the power supply voltage of the battery falls below the minimum voltage required to drive the starter motor. Even in the above-described conventional apparatus, the power supply control to the heater is performed in such a manner. Have been. However, in setting the timing for stopping the power supply to the heater, the power supply is stopped at a voltage threshold value larger than necessary to ensure the minimum power supply voltage required by the battery. In this case, the state in which the grip can be heated by the heater is very limited, and if the voltage threshold is too small, the battery needs to be charged due to a voltage detection error or a voltage drop from the battery to the detection unit. The power supply to the heater may be performed even if the power supply voltage is lower than the minimum power supply voltage, and it may be difficult to start the vehicle. It is desirable to set the minimum value in consideration of an error and a voltage drop.

By the way, when the power supply to the heater is stopped, the power supply voltage of the battery slightly rises, and the power supply to the heater is turned on at a constant voltage threshold.
If the control is turned off, the power supply to the heater is repeatedly turned on and off frequently, causing hunting of the control. As a result, the grip cannot be heated stably, and a good temperature-sensitive feeling cannot be obtained. .

The present invention has been made in view of such circumstances, and has been made to reliably prevent the battery from running out and to stably heat the grip so that a good temperature-sensitive feeling can be obtained. An object of the present invention is to provide a control device for a heater with a built-in vehicle grip.

[0006]

According to the present invention, there is provided a switching means for controlling on / off of electric power supplied from a battery to a heater incorporated in a grip provided on a steering handle. And a drive signal output means for outputting a drive signal for turning on the switching means, the control device for the heater with a built-in grip for a vehicle, wherein the voltage corresponding to the power supply voltage output from the battery is less than the first voltage threshold. At a certain time, the driving signal output from the driving signal output means is prohibited, and the voltage corresponding to the power supply voltage is equal to or higher than a second voltage threshold set higher than the first voltage threshold by a predetermined value or more. Power supply voltage monitoring means for enabling the drive signal output from the drive signal output means when the The minimum power supply voltage and V _M, the voltage drop from the battery to the power supply voltage monitoring means and [Delta] V _1,
The maximum voltage detection error on the plus side, which is assumed in the power supply voltage monitoring means is taken as [Delta] V _2, the first voltage threshold value is set as _{(V M -ΔV 1 + ΔV 2} ).

According to this configuration, the voltage for stopping the power supply to the heater is determined in consideration of the voltage drop from the battery to the power supply voltage monitoring means and the voltage detection error assumed by the power supply voltage monitoring means. The threshold value (first voltage threshold value) is set as small as possible, so that even if the power supply voltage becomes lower than the minimum power supply voltage required for the battery, power supply to the heater is prevented, and the grip is controlled by the heater. The chances of heating can be increased as much as possible. Also, by permitting power supply from the battery to the heater at a second voltage threshold value that is higher than the first voltage threshold value by a predetermined value or more, the power supply to the heater is prevented from being repeatedly turned on and off. Thus, the grip can be stably heated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

1 to 8 show a first embodiment of the present invention. FIG. 1 is a front perspective view of a motorcycle to which the present invention is applied, and FIG. 2 is an electric circuit showing a configuration of a grip heater unit. FIG. 3 is a diagram showing the output timing of the periodic voltage and the drive signal, FIG. 4 is a diagram showing the output timing of the proportional voltage and the drive signal, FIG. 5 is a front view of the control box, and FIG. 6 is 6-6 in FIG. FIG. 7 is a circuit diagram showing a connection structure between the grip heater unit and the stop switch and the left and right front turn signal lamps. FIG. 8 is a perspective view showing a wiring state around the front fork.

Referring to FIG. 1, a front fork 21 for suspending a front wheel W is rotatably supported at the front end of a body frame of a motorcycle.
A headlamp 22 and left and right front turn signal lamps 23 _L and 23 _R are attached to the middle part in the vertical direction, and a speedometer 24 and a tachometer 25 are attached to the upper end of the front fork 21.

At the upper end of the front fork 21, a front wheel W
A pipe-shaped steering handle 26 extending in the left-right in order to steering operation is provided, and the left end portion of the steering wheel 26, a clutch operating with the left hand that grips the left grip 27 _L, the left grip 27 _L It is disposed and the lever 28, the right end portion of the steering wheel 26, a right grip 27 _R, and a brake lever 29 for operating with the right hand that holds the right grip 27 _R is disposed.

In FIG. 2, the left and right grips 2
The heaters 30 _L and 30 _R made of a flexible printed wiring board or the like are built in the 7 _L and 27 _R , respectively.
A grip heater unit 32 is composed of the two heaters 30 _L and 30 _R connected in series, and a control device 31 that controls power supply to the heaters 30 _L and 30 _R.

From the grip heater unit 32,
A plus connection line 84 connected to a plus side of a battery 84 mounted on the motorcycle;
Negative connection line 8 connected (grounded) to the negative side of
5, one end of a series circuit composed of both heaters 30 _L and 30 _R is connected to the positive connection line 34, and the other end is connected to the control device 31.

The control device 31 includes a switch 36 connected to the positive connection line 34, a surge absorber 37, a diode 38, a constant voltage output unit 39, a periodic voltage generation unit 40, and a comparison voltage output unit 41. Fail-safe means 42, drive signal output means 43, power supply voltage monitoring means 44, resistor 45, field effect transistor 46,
A surge absorber 47 and a capacitor 48 for removing electrostatic noise are provided.

Surge absorber 37 and diode 3
8 is connected between the switch 36 and the constant voltage output means 39. Further, the field effect transistor 46 is connected to the other end of the series circuit of the heaters 30 _L and 30 _R whose one end is connected to the positive connection line 34, and the surge absorber 47 and the capacitor 48 are connected to the series circuit and the field effect transistor 46. Connected between them. Further, the resistor 45 is connected in series between the drive signal output unit 43 and the gate of the field effect transistor 46.

The constant voltage output means 39 outputs a predetermined constant voltage Vc based on the supply voltage from the battery 84 input from the positive connection line 34 via the surge absorber 37 and the diode 38 when the switch 36 is turned on. And a resistor 50 and a Zener diode 51 connected in series between the diode 38 and the ground potential, a smoothing capacitor 52 connected between the diode 38 and the resistor 50, and a smoothing capacitor connected in parallel to the Zener diode 51. And a capacitor 53.

The periodic voltage generating means 40 outputs a triangular wave voltage Vt that changes at a predetermined cycle based on the constant voltage Vc output from the constant voltage output means 39, and a resistor connected to the constant voltage output means 39. 54, 55 and both resistors 5
An operational amplifier 56 having a non-inverting input terminal connected to a connection point of the operational amplifiers 4 and 55; a capacitor 57 provided between the inverting input terminal of the operational amplifier 56 and a ground potential;
6, a resistor 5 provided between the output terminal and the inverting input terminal.
8 and a chattering preventing resistor 59 provided between the output terminal and the non-inverting input terminal of the operational amplifier 56. Thus, the reference voltage Vd obtained by dividing the resistance by the resistors 54 and 55 and the charging voltage of the capacitor 57 (the triangular wave voltage V
t) is compared with the operational amplifier 56, and the operational amplifier 5
The capacitor 57 is charged / discharged via the resistor 58 by the output of 6, thereby outputting the triangular wave voltage Vt.

The comparison voltage output means 41 outputs a comparison voltage Vp for temperature adjustment based on the constant voltage Vc output from the constant voltage output means 39, and is connected in series between the constant voltage Vc and the ground potential. A variable resistor 60 and a resistor 61; a resistor 62 connected in parallel to the variable resistor 60;
And a resistor 63 connected to a contact point that is in sliding contact with the variable resistor 60.

The drive signal output means 43 compares the triangular wave voltage Vt output from the periodic voltage generation means 40 with the comparison voltage Vp output from the comparison voltage output means 41, thereby obtaining a square wave drive signal Vt. _OUT , which is provided between the output terminal and the non-inverting input terminal of the operational amplifier 64 to which the comparison voltage Vp is input to the non-inverting input terminal and the triangular wave voltage Vt is input to the inverting input terminal. Resistance 65 for preventing chattering
The output terminal of the operational amplifier 64 is connected to the gate of the field effect transistor 46 via the resistor 45. Thus, the operational amplifier 64 sets the triangular wave voltage Vt to the comparison voltage Vp.
A rectangular drive signal V _OUT which becomes high level (constant voltage Vc level) when the voltage is lower than the reference voltage and becomes low level (ground potential level) when the triangular wave voltage Vt is higher than the comparison voltage Vp is output. The field effect transistor 46 is turned on and off to control power supply to both heaters 30 _L and 30 _R.

That is, as shown in FIG.
When the triangular wave voltage Vt is output from the pressure generation means 40
3B from the drive signal output means 43.
Thus, the triangular wave voltage Vt becomes larger than the comparison voltage Vp.
Rectangular drive signal V that goes high in response to_OUTBut
The comparison voltage is output by the comparison voltage output means 41.
By changing the pressure Vp, both heaters 30_L, 30
_RThe ON / OFF time ratio (duty ratio)
And thereby both heaters 30_L, 30 _RPower of
The amount of bias is controlled.

The fail-safe means 42 is provided with a comparison voltage Vp
Is provided between the non-inverting input terminal of the operational amplifier 64 to which the reference voltage is input and the ground potential, and the resistance value of the resistor 66 is sufficiently larger than that of the variable resistor 60 in the comparison voltage output means 41. Is set. Thus, when the comparison voltage Vp from the comparison voltage output means 41 becomes unstable, the output from the drive signal output means 43 is set to the low level by setting the comparison voltage Vp to the ground potential, and the heaters 30 _L , The power supply to 30 _R is stopped.

The power supply voltage monitoring means 44 monitors the power supply voltage Vb of the battery 84 obtained between the diode 38 and the constant voltage generation means 39 when the switch 36 is turned on, and determines whether or not the drive signal output means 43 can output a drive signal. The power supply voltage Vb is divided to generate a proportional voltage V
b ', resistors 67 and 68 connected in series between the diode 38 and the ground potential, a noise removing capacitor 69 connected in parallel to the resistor 68, and the constant voltage output means 3.
9, resistors 70 and 71 connected in series between the constant voltage output means 39 and the ground potential to divide the constant voltage Vc output from the reference voltage Vc to obtain a reference voltage (voltage threshold).
b 'is input to the inverting input terminal and the reference voltage is input to the non-inverting input terminal; an operational amplifier 72; a hysteresis setting resistor 73 connected between the output terminal and the non-inverting input terminal of the operational amplifier 72; Operational amplifier 72
Is connected to the inverting input terminal of the operational amplifier 72 and the non-inverting input terminal of the operational amplifier 72 is connected to the non-inverting input terminal. 75, and the output terminal of the operational amplifier 74 is
3 is connected to the non-inverting input terminal of the operational amplifier 64.

In such a power supply voltage monitoring means 44, when the output of the operational amplifier 72 goes low, the output of the operational amplifier 74 goes high, and is input to the non-inverting input terminal of the operational amplifier 64 in the drive signal output means 43. The comparison voltage Vp is not changed, and the energization of both heaters 30 _L , 30 _R is controlled on / off according to the comparison voltage Vp. That is, the operational amplifier 74 outputs a permission signal for permitting the output of the drive signal from the drive signal output unit 43 as a high-level signal. On the other hand, when the output of the operational amplifier 72 becomes high level, the operational amplifier 7
The output of the operational amplifier 64 is forcibly lowered to the low level by drawing the comparison voltage Vp input to the non-inverting input terminal of the operational amplifier 64 in the drive signal output means 43 to the operational amplifier 74 side. allowed, energization of the both the heaters 30 _L, 30 _R is stopped. That is, the operational amplifier 74 is connected to the drive signal output unit 43.
Will be output as a low-level signal.

The operational amplifier 72 in the power supply voltage monitoring means 44 is positively fed back by a resistor 73, and the proportional voltage Vb 'input to the operational amplifier 72 is
When the voltage drops, the voltage is substantially reduced, and when the voltage increases, the voltage is substantially increased. Therefore, in the operational amplifier 74, the reference voltage, that is, the hysteresis of the voltage threshold is substantially set, and the proportional voltage Vb 'is set.
The first voltage threshold V _S1 is compared with the proportional voltage Vb ′ when the voltage falls, and when the proportional voltage Vb ′ becomes less than the first voltage threshold V _{S1, a} high-level signal is output from the operational amplifier 74. When the proportional voltage Vb 'rises, the second voltage threshold V _S2 greater than the first voltage threshold V _S1 by a predetermined value or more is compared with the proportional voltage Vb', and the proportional voltage Vb 'is changed to the second voltage. When the threshold value V _{S2 is} exceeded, the operational amplifier 7
4 outputs a low-level signal.

That is, as shown in FIG. 4A, when the proportional voltage Vb 'changes, the power supply voltage monitoring is performed in accordance with the drop of the proportional voltage Vb' to become less than the first voltage threshold V _S1. The means 44, that is, the low-level inhibit signal is output from the operational amplifier 74, and the drive signal output means 4
4 is forcibly set to a low level as shown in FIG. 4 (b), and as the proportional voltage V _b ′ rises to become equal to or higher than the second voltage threshold V _S2, the power supply voltage becomes higher. A high-level permission signal is output from the monitoring unit 44, and a high-level driving signal is output from the driving signal output unit 43 in response to the high-level permission signal, as shown in FIG.

By the way, the first voltage threshold V _S1 is defined as a minimum power supply voltage required by the battery 84 for running the motorcycle, V _M, and a wiring from the battery 84 to the power supply voltage monitoring means 44. ΔV ₁
When the plus-side maximum voltage detection error assumed by the power supply voltage monitoring means 44 is ΔV ₂ , V _S1 = V _M −ΔV ₁ + ΔV ₂ is set, and the required minimum power supply voltage V
_M is, for example, 12.5 V necessary for operating the starter motor 103 (see FIG. 7), the voltage drop ΔV ₁ is 0.5 V, and the positive-side maximum voltage detection error Δ
The V ₂ when the 0.3V, the first voltage threshold value V _S1 will be set to 12.3 V. Further, second voltage threshold V _S2 is set to be larger than first voltage threshold V _S1 by, for example, the above-mentioned voltage drop ΔV ₁ (0.5 V), and first voltage threshold V _S1 is set to 12 or more. When the voltage is 0.3 V, the second voltage threshold V _S2 is 12.8 V or more.

The control device 31 configured as described above
The control box 80 is provided on a substrate 82 incorporated in the control box 80 shown in FIGS. 5 and 6, and on the surface of the control box 80, the on / off switching of the switch 36 in the control device 31 and the variable resistance Bowl 60
A knob 81 for performing the contact sliding operation is provided. By operating the knob 81 to the “OFF” position, the switch 36 is turned off, and the knob 81 is
By rotating between the “LO” position and the “HI” position, the resistance value of the variable resistor
It is possible to adjust the temperature to 0 _L and 30 _R. Moreover, as shown in FIG. 1, the control box 80
It is disposed at a position close to the left grip 27 _L of the steering wheel 26.

In FIG. 7, the main switch 10 is connected to the plus side of the battery 84 through the main fuse 100.
1 or one end of a combination switch having a function of a main switch is connected, and a starter motor 103 is connected via a relay switch 102. An AC generator 104 is provided between the main fuse 100 and the main switch 101. A charging device 105 for rectifying the obtained AC power and supplying charging power to the battery 84 is connected.

The minus side of the battery 84, the starter motor 103 and the charging device 105 are grounded at grounding portions E _A , E _B , and E _C which are set at mutually different portions of the engine case of the engine mounted on the motorcycle. Is done. In addition, a ground wire 115 connected to the grounding portion E _C is connected to the steering handle 26.

Fuses 106, 107, and 108 are connected in parallel to the other end of the main switch 101. The fuse 106 is connected to a grounding section E _C via a series circuit including a starter switch 109 and a relay coil 110. The fuse 107 is connected to the headlamp switch 11.
1 and a headlamp 22 are connected to a grounding section E _C via a series circuit. The starter switch 109
Is provided on the right end side of the steering handle 26. When the starter switch 109 is turned on to energize the relay coil 110, the relay switch 102 is turned on to supply power to the starter motor 103. Will be. The headlamp switch 111 is disposed on the right end side of the steering handle 26.

The fuse 108 is connected to the turn signal relay 89.
Connected to one end. Also installed on the front fork 21
Left and right front turn signal lamps 23_L,
23 _ROne end of those front turn signal lamps
23_L, 23_RTurn signal switch to select and switch the lighting of
Connected to the other end of the turn signal relay 89 via the switch 86
And both front turn signal lamps 23_L, 23_ROther
The ends are connected via connection terminals 90a and 90b which are connected to each other.
And ground part E_CCan be connected to And the blinkers
The switch 86 is located on the left side of the steering handle 26.
Is established.

Fuse 108 and turn signal relay 8
9, one end of a stop switch 85 can be connected via connection terminals 87a and 87b connected to each other.
The other end of the stop switch 85 is connected to a grounding section E _C via a stop lamp 88. Moreover, the stop switch 85 is disposed on the right end side of the steering handle 26.

From the grip heater unit 32 composed of the series circuit composed of the two heaters 30 _L and 30 _R and the control device 31, the positive and negative connection lines 34 and
35 is extended, but the positive connection line 34 is
One end of an interrupt connection line 91 having a fuse 92 is connected, and the minus connection line 35 is connected to one end of an interrupt connection line 93. Thus, between the main switch 101 for switching the connection and disconnection of the battery 84 to the plus side and the stop switch 85 as the first electric component disposed on the steering handle 26, in this embodiment, the main switch 101 The other end of the interrupt connection line 91 is interrupt-connected at a position close to the stop switch 85 between the fuse 108 connected to the stop switch 85 and the stop switch 85, and the minus connection line 35 is a member that rotates integrally with the steering handle 26. Left and right front turn signal lamps 23 _L and 23 _R and a battery 84 as second electric components disposed on the front fork 21.
Minus side, that the other end of the interruptive connection line 93 at a position close to the front winker lamps 23 _L, 23 _R in between the ground portion E _C of are interrupted connection.

Referring also to FIG. 8, the positive connection line 3
The other end of the interrupt connection line 91 connected to 4 is interrupt-connected between the fuse 108 and the stop switch 85 via, for example, a trifurcated branch connection line 94. That is, the connection terminal 96 provided on the other end of the interrupt connection line 91 and the connection terminals 98a, 98b, 98c connected to the connection terminals 87a, 87b connecting the fuse 108 to the stop switch 85 are connected to the branch connection line 94. Provided.

Further, an interrupt connected to the negative connection line 35
The other end of the connection line 93 is, for example, a trifurcated branch connection line 95.
Via the left and right front turn signal lamps 23_L, 2
3_RAnd grounding section E_CAn interrupt connection is made between them. Sand
The connection terminal 9 provided on the other end of the interrupt connection line 93
7 and left and right front turn signal lamps 2
3 _L, 23_RTo the grounding section E_CConnection terminals 90a,
90b, the connection terminals 99a, 99b,
99c is provided on the branch connection line 95.

Next, the operation of the first embodiment will be described.
And fuse 1 connected via main switch 101
08 and between the stop switch 85, and the left, between the right front winker lamps 23 _L, 23 _R and the grounding portion E _C, interrupts each the positive side connecting wire 34 and the minus-side connecting wire 35 is extended from the grip heater unit 32 is By being connected, the heaters 30 _L , 3
0 _R also between the stop switch 85 and the left by operation of, while avoiding that the right front winker lamps 23 _L, 23 _R is malfunctioning, the grip heater unit 3
2 is connected to the plus side and the minus side of the battery 84, so that the grip heater unit 32 can be mounted on the vehicle.

Further, since the stop switch 85 is provided on the steering handle 26 and the front turn signal lamps 23 _L and 23 _R are provided on the front fork 21 which operates integrally with the steering handle 26, the stop switch 85 is provided. The wiring portion connected to the front turn signal lamp 85 and the front turn signal lamps 23 _L and 23 _R is wired so as not to be twisted even by the turning operation of the steering handle 26. Does not cause a problem in durability and reliability of the connection structure interruptedly connected to each disposed portion in the vicinity of.

In vehicles such as motorcycles, snowmobiles, and three-wheel buggies, wiring portions between the stop switch 85 and the main switch 101 and wiring portions of the left and right front turn signal lamps 23 _L and 23 _{R to} the grounding portion E _C. However, in general, it is located in the vicinity of the steering handle 26, and an interrupt connection to those wiring portions is performed to easily achieve general-purpose electrical connection of the grip heater unit 32 to a general vehicle. be able to.

[0039] In the power supply voltage monitoring unit 44 in further control device 31, the necessary minimum power source voltage required in the battery 84 to allowed to travel the motorcycle and V _M, the wiring from the battery 84 to the power supply voltage monitoring means 44 Is the voltage drop of ΔV ₁ and the maximum voltage detection error on the plus side assumed by the power supply voltage monitoring means 44 is ΔV ₂ ,
(V _S1 = V _M −ΔV ₁ + ΔV ₂ )
Since the first voltage threshold V _S1 for stopping the power supply to 0 _L and 30 _R is set, the first voltage threshold V _S1 is determined by the voltage drop and the voltage detection by the power supply voltage monitoring means 44. In consideration of the error, the battery 84 is set to be as small as possible while maintaining the required minimum power supply voltage required for driving the motorcycle. 30 _L , 30 _R
To avoid power supply to the heater 30
_L, 30 _R makes it possible to make as much as possible opportunities grip 27 _L, 27 _R may warmed. Further, a second voltage threshold V _S2 higher than the first voltage threshold V _S1 by a predetermined value or more.
By the from the battery 84 to allow the power supply to the heater 30 _L, 30 _R in the heater 30 _L, 30
Without power supply on and off to _R are frequently repeated, good feeling by the heater 30 _L, 30 power supply control of the _R stabilized, stably warming the grip 27 _L, 27 _R A warm feeling can be obtained.

In addition, the voltage monitored by the power supply voltage monitoring means 44 is obtained by an interrupt connection line 91 which is interrupt-connected to the plus side of the stop switch 85.
Since the voltage dropped by passing through the fuse 1 and the fuse 108 is monitored, a dedicated resistor is not required. Also, a stop lamp 85 by the conduction of the stop switch 85
Is turned on, when a voltage drop occurs at the interrupt connection portion of the interrupt connection line 91 and becomes lower than the first voltage threshold value V _S1 , power supply to the heaters 30 _L and 30 _R is immediately stopped, and a stop lamp is provided. 85 is preferentially held.

FIG. 9 shows a second embodiment of the present invention, in which parts corresponding to those of the first embodiment are denoted by the same reference numerals.

In the first embodiment, the head lamp 22 and the left and right front turn signal lamps 23 _L , 23 _R
Has been attached to the front fork 21 which rotates integrally with the steering handle 26, but may be attached to the body frame side, for example, to a cowling.
In this case, the negative connection line 35 as a second connection line extending from the grip heater unit 32 is connected to the steering handle 26 together with the ground wire 115 connected to the grounding portion E _C , for example, by tightening together. Further, the positive connection line 34 as the first connection line is interrupt-connected between the stop switch 85 and the fuse 108 as in the first embodiment.

According to the second embodiment, since the minus connecting line 35 is connected to the steering handle 26, the minus connecting line 35 is not twisted by the rotation of the steering handle 26, and the first connecting line 35 is not twisted. The same effects as the embodiment can be obtained.

In the above embodiment, the positive connection line 34 of the grip heater unit 32 is interrupt-connected between the stop switch 85 and the fuse 108. Is also possible. However,
Some vehicles use AC power as the power supplied to the headlamp 22. In such a case, the interrupt connection of the positive connection line 34 is not possible. It is desirable to connect the plus side connection line 34 between the switches 101 by interruption.

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

[0046]

As described above, according to the present invention, the power supplied to the heater is considered in consideration of the voltage drop from the battery to the power supply voltage monitoring means and the voltage detection error assumed by the power supply voltage monitoring means. By setting the first voltage threshold value for stopping the supply to be as small as possible, it is possible to prevent the power supply to the heater from being performed even when the power supply voltage becomes equal to or lower than the minimum power supply voltage required for the battery. Thus, the chance of heating the grip can be increased as much as possible, and the power supply from the battery to the heater is permitted at the second voltage threshold higher than the first voltage threshold by a predetermined value or more. It is possible to prevent the power supply to the power supply from being repeatedly turned on and off frequently, to stably heat the grip, and to obtain a good temperature-sensitive feeling.

[Brief description of the drawings]

FIG. 1 is a front perspective view of a motorcycle according to a first embodiment.

FIG. 2 is an electric circuit diagram showing a configuration of a grip heater unit.

FIG. 3 is a diagram illustrating output timings of a periodic voltage and a drive signal.

FIG. 4 is a diagram showing output timings of a proportional voltage and a drive signal.

FIG. 5 is a front view of a control box.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a circuit diagram showing a connection structure between a grip heater unit, a stop switch, and left and right front turn signal lamps.

FIG. 8 is a perspective view showing a wiring state around a front fork.

FIG. 9 is a circuit diagram corresponding to FIG. 7 of the second embodiment.

[Explanation of symbols]

26: Steering handle 27 ₁ , 27 _2: Grip 30 _L , 30 _R: Heater 31: Control device 43: Drive signal output means 44: Power supply voltage monitoring means 46: Field-effect transistors as switching means

Claims (1)

[Claims] 1. A steering handle (26) provided on a steering handle (26).
Grip (27 _L, 27_R) Built-in heater
(30_L, 30_R) From the battery (84)
Switching means (46) for controlling on / off of the force;
A drive signal for turning on the switching means (46)
Signal output means (43) for outputting a signal
In the control device of the heater with a built-in grip, the battery (8
The voltage corresponding to the power supply voltage output from 4) is the first voltage
If the driving signal output means (43) is less than the threshold value,
And to prohibit the output of these drive signals,
The voltage corresponding to the power supply voltage is more than the first voltage threshold
When the voltage is equal to or higher than the second voltage threshold set higher than the value
Allows output of drive signal from drive signal output means (43)
Power supply voltage monitoring means (44) for setting the
The minimum power supply voltage required for the battery (84) is V_MWhen
From the battery (84) to the power supply voltage monitoring means (44).
ΔV₁Power supply voltage monitoring means (4
The maximum voltage detection error on the plus side assumed in 4) is ΔV_Two
When the first voltage threshold is (V_M-ΔV₁
+ ΔV_Two) Which is set as
Control device for heater with built-in lip.