JPH0227158A - Engine starting device for vehicle - Google Patents

Abstract

PURPOSE:To ensure the starting of an engine at all times by connecting a sub- battery in parallel with a main battery in linkage with the turn-on motion of a starter switch. CONSTITUTION:When a starter switch 17 is turned on after turning on a main switch 16, a starter relay 19 is turned on by the electric current from a main battery 7, and a relay 22 is also turned on by the electric current from a sub- battery 8. As a result. the sub-battery 8 is connected with the main battery 7, and these batteries 7, 8 are connected with a starter motor 4. Consequently, even if the electric capacity of the main battery 7 is reduced by the use of the first current consumer 10, the starter motor 4 is securely driven so that an engine 2 is securely started at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle engine starting device using a starter motor as a starting means.

(Prior Art) Engine starting methods for motorcycles such as motorcycles include a kick starting method and a starter motor starting method.Recently, the former is decreasing and the latter is becoming the mainstream.

By the way, in the starter motor starting type described above, the starter motor or the battery is used as the power source (drive source) to drive the engine.In particular, when the engine is stopped, the electric load such as a warning lamp such as a patrol motorcycle is powered by the battery. Even when the vehicle is not being charged by rotation, the battery power continues to be consumed, and the battery capacity eventually decreases beyond the value required to drive the starter motor, causing the engine to start. Situations may arise where this becomes impossible.

Therefore, apart from the regular battery (main battery), a starting compensation battery (sub battery) is installed in the vehicle, and the connection circuits of these two batteries to the starter motor can be switched via a changeover switch to prevent the above situation. An engine starting device has been proposed in which, when this occurs, the changeover switch is switched to the compensation battery and the starter motor is driven using the compensation battery as a power source (see Japanese Patent Laid-Open No. 118561/1983). ).

(Problem to be solved by the invention) However, in the engine starting device according to the above proposal, the writer first presses the starter switch to confirm that the engine cannot be started, and then manually presses the changeover switch. Since it is necessary to switch to the compensation battery side, there is a problem that the operation is troublesome.

The present invention has been made in view of the above problems, and its purpose is to enable a vehicle to always start the engine reliably by simply pressing the starter switch without requiring any additional operations. To provide engine starting equipment for.

(Means for Solving the Problems) To avoid achieving the above object, the present invention provides an engine starting device for a vehicle that starts an engine by a starter motor driven by a battery as a power source, in which a sub-battery is installed separately from the main battery. The sub-battery is connected in parallel to the main battery in conjunction with the ON operation of the starter switch.

(Function) The power of the sub-battery is not consumed by any electrical load other than the starter motor, and therefore, the sub-battery always has sufficient capacity to drive the starter motor. Therefore, when the starter switch is turned on, this sub-battery is connected in parallel to the main battery in conjunction with this operation, so the capacity of the main battery drops below the value required to drive the starter motor due to the use of the electrical load. Even in such a case, the starter motor is reliably driven by the power from the main battery and the sub-battery, and the engine can always be reliably started simply by turning on the starter switch.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 2 is a side view of a motorcycle 1 equipped with an engine starting device according to the present invention. In the figure, 2 is an engine mounted below a fuel tank 3. A starter motor 4 is arranged to drive the motor 2. Also, it is located behind the engine 2 and the seat 6
A main hatch leaf and a sub-battery 8 having a smaller capacity than the main hatch leaf are provided below. Further, an electric load (first electric load) 10 such as a warning lamp is attached to a frame 9 that moves forward of the engine 2.

Next, the electric circuit configuration of the engine starting device according to the present invention will be explained based on FIG.

In FIG. 1, 11 is the engine 2 (see FIG. 2).
is an AC generator driven by the AC generator 1
1 is connected to a rectifier regulator 12 and a rectifier 13. The main hatch leaf and the first electric load 10 are connected to the rectifier regulator 12 in parallel. Incidentally, a fuse 14 and a switch 15 are interposed between the main hatch lift and the rectifier regulator 12 to connect the first electric load 10 and the rectifier regulator 12, respectively.

Further, a starter switch 17 and a second electric load 18 are connected in parallel to the main hatch lift and the first electric load 10, which are connected in parallel, via the main switch 16. A starter relay 19 and a tie auto 20 are interposed between the main switch 16 and the second electric load 18, and a switch 21 is interposed between the main switch 16 and the second electric load 18.

On the other hand, the rectifier 13 is connected in parallel to the sub-battery 8 via a main hatch lift or a relay 22. The starter motor 4 (see FIG. 2) is connected to the main hatch lift and sub-battery 8, which are connected in parallel, via the starter relay 19.

Next, the operation of this engine starting device will be explained.

While the engine 2 is operating, the main switch 16 is in the ON state, the starter switch 17 and the starter relay 19 are in the ON state.
and relay 22 are both in the OFF state, and at this time the AC
The generator 11 is driven by the engine 2, and the current generated by the AC generator 11 is rectified and voltage controlled by a rectifier regulator 12 and supplied to the main hatch lift, and is then rectified by a rectifier 13. The main hatch lift and the sub-battery 8 are charged at the same time. Note that the second electrical load 18 can be operated by turning on the switch 21 only when the main switch 16 is in the ON state.

However, main switch 16 was turned off and engine 2
Even if the first electric load 10 is activated or stopped, if the switch 15 is turned ON, the first electric load 10 is connected to the main battery 7 regardless of whether the main switch 16 is ON or OFF. It is possible to operate it using the power supply of this main hatch lift.

Therefore, even if the capacity of the main hatch lift drops below the value necessary to drive the starter motor 4 due to the operation of the first electric load 10, the power source of the sub-battery 8 will be powered by sources other than the starter motor 4. Since the sub-battery 8 is not consumed by the electrical loads (first and second electrical loads 10° 18) and is charged as described above while the engine 2 is operating, the sub-battery 8 is not consumed by the starter motor 4. Always has sufficient electrical capacity. Therefore, in this embodiment, even in the above case, the engine 2 can always be started by using the sub-battery 8 as a power source.

That is, when the starter switch 17 is turned ON after the main switch 16 is turned ON/L, the starter relay 19 is turned ON by the current from the main batch rear, and at the same time, the relay 22 is also turned ON/L by the current from the sub-battery 8.
As a result, the sub-battery 8 is connected to the main hatch lift, and since both the main battery 7 and the sub-battery 8 are connected to the starter motor 4, the main Even if the electrical capacity of the hatch leaf drops below the value required to drive the starter motor 4, the starter motor 4 or is reliably driven,
The engine 2 is always started reliably by the starter motor 4. Furthermore, since starting the engine 2 does not require any additional operation other than turning on the starter switch 17, the starting operation does not become complicated.

In addition, the starter motor 4 has both hatch lifts and 8 as described above.
Since the sub-battery 8 has sufficient capacity to make up for the shortage of the main hatch lift, the sub-battery 8 can be made smaller.

(Effects of the Invention) As is clear from the above description, according to the present invention, in an engine starting device for a vehicle that starts an engine by a starter motor driven using a battery as a power source, a sub-battery is provided separately from a main battery, and a sub-battery is provided separately from a main battery. Since the sub-battery is connected in parallel to the main battery in conjunction with the ON operation of the starter switch, the sub-battery's power source is not used by electrical loads other than the starter motor.
The sub-battery always has enough electrical capacity to drive the starter motor, so even if the main battery capacity drops below the value required to drive the starter motor due to the use of an electrical load, Also, the starter motor is reliably driven by the power from the main battery and the sub-battery, and the engine can always be reliably started simply by turning on the starter switch.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of an engine starting device according to the present invention;
FIG. 2 is a side view of a motorcycle equipped with the same engine starting device. DESCRIPTION OF SYMBOLS 1... Motorcycle, 2... Engine, 4... Starter motor, 7... Main battery, 8... Sub battery, 10.18... Electric load, 17... Starter switch.

Claims (1)

[Claims] In an engine starting device for a vehicle that starts an engine by a starter motor driven by a battery as a power source, a sub-battery is provided separately from the main battery, and the sub-battery is connected in parallel to the main battery in conjunction with the ON operation of a starter switch. A vehicle engine starting device characterized by: