JPS60187766A - Starting device for engine - Google Patents

Abstract

PURPOSE:To prevent kick-back, smooth the starting of engine and prevent the driving system of the starting device from being damaged by starting ignition after the revolving speed of the engine has arrived at somewhat high speed. CONSTITUTION:When a main switch 14 is closed at first upon starting the engine, an ignition circuit is not operated since the control switch 25 of the ignition circuit 13 is being opened. Subsequently, a starter switch 16 is closed, then, a relay 17 is conducted to operate a starting motor 18 and rotate the engine. Simultaneously, the timer 26 of a delay means 27 is operated and a control switch 25 is closed to operate the ignition circuit 13 after a predetermined time has elapsed from the beginning time of the operation of starter motor 18. Thus, the revolving speed of the engine has arrived at somewhat high speed when the ignition is started, therefore, kick-back, readily caused upon the low revolution immediately after starting, may be prevented. About 300r.p.m. of the revolving number of engine is enough to satisfy this requirement.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic or manual starting device for a reciprocating engine.

(Prior art) Conventionally, motorcycle engines have been equipped with automatic starting devices such as starter motors or human-powered starting devices such as kick starters, but regardless of which starting device is used, When the engine is started, a sudden engine stop phenomenon called ``squeezing'' occurs, which prevents a smooth start and may damage the drive system of the starter.

The reason why the above-mentioned sting occurs is as follows. For example, to operate the starter motor, first turn on the main switch of the engine, then turn on the starter switch to energize the starter motor. However,
When the L main engine is turned on, the ignition circuit is also closed.
, p. 235, Figure 5.11), sparks will fly from the spark plug at the same time as the cell mower starts operating. Here, ignition by the spark plug is performed just before the top dead center of the piston. Therefore, as mentioned above, if ignition is performed when the engine starts to rotate and the engine speed is very low, the explosive force will cause the piston to reach top dead center.
J, the engine tries to rotate in reverse and suddenly stops.

In particular, in engines with a large piston bore and a small number of cylinders, the rotational driving force per cylinder is large, so the kicking force is large. Additionally, many modern engines have higher compression ratios to improve performance, which increases explosive power and makes it even more likely to cause a crash.

(Object of the Invention) This invention breaks down the conventional iθ concept of activating the ignition circuit at the same time as the start of operation of the engine starter, which was made in view of the characteristics of ``2. An object of the present invention is to provide an engine starting device which starts the ignition after the engine temperature reaches 11-1, thereby preventing the engine from kicking and starting the engine smoothly, and preventing damage to the drive system of the starting device. purpose.

(Structure of the Invention) In order to achieve the above object, the present invention provides a configuration in which the ignition circuit of the engine is provided with a delay means for closing the ignition circuit at a time later than the start of operation of the engine starter. I try to start the ignition after the rotation has increased to a certain level.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an automatic starting device. In the same figure, a starting circuit 12 and an ignition circuit 13 are shown with respect to a battery power source 11.
are connected in parallel to each other.

The starting circuit 12 includes a manual main switch 14, a fuse 15, a manual starter switch 16, a relay 17 and its contact 17a that is energized when the starter switch 16 is closed, and a starter motor that is energized when the contact 17a is closed. (engine starter) 18.

- 10,000, the ignition circuit 13 is located close to the signal rotor 20 and outputs a timing signal, and the amplifier coil 2
1, an igniter 22 which receives a timing signal from this pickup coil 21 and generates an ignition signal, an ignition coil 23 which generates a large voltage for ignition under the control of the F ignition signal, and this large ton. The spark plug 24, which emits a spark in response to pressure, is connected to the spark plug 24. The ignition circuit 13 also includes a control switch 25 that controls the operation of the igniter 22 described in -H, that is, controls the operation of the ignition circuit 13.
It is activated by opening the starter switch 16 of the starting circuit 12, and after a predetermined period of time, the control switch 1-8 is activated.
A delay means 27 consisting of a timer (delay drive circuit) 26 for closing 5 is provided.

In the configuration described in 1-1, when starting the engine, first,
Main switch 14 is closed. At this time, ignition circuit 1
Since the control switch 25 of No. 3 is open, the ignition circuit 13 is not activated. Next, when the starter switch 16 is closed, the relay 17 is energized, its contact 17a is closed, and the starter motor 18 is activated to rotate the engine.

At the same time, the timer 26 of the delay means 27 is activated, and the control switch 25 is closed to activate the ignition circuit 13 after a predetermined period of time has elapsed since the starting time of the starter motor 18 .

In this way, since the ignition circuit operates later than the starting point of the starter motor, the rotation of the engine has already increased to some extent by the time one ignition is started.

Therefore, the accident that occurs at low rotation speed immediately after starting is completely prevented by +1=. Engine speed is approximately 3
If there are also 0 Or, p, and m, it is sufficient to prevent the above predetermined time from being misplaced.
You can set it to around seconds.

In the above embodiment, the timer 26 is used to operate the ignition circuit 13 after a predetermined time has elapsed since the starter switch 16 is opened. The ignition circuit 13 may be activated when the condition becomes ``-''. An example thereof is shown in FIG.

The starting device η in FIG. 2 is a manual starting device equipped with a kick starter 18A. 31 is a rotation detector that detects the engine rotation speed, and the ignition circuit 13 includes a control switch 25 that controls the operation of the igniter 22, that is, the operation of the ignition circuit, and a control switch 25 that receives a signal from the rotation detector 31. A delay means 27 is provided which includes a delay drive circuit 26 that closes the control switch 25 when the rotational speed reaches a predetermined value of 4fi or more.

In the embodiment shown in FIG. 2, when starting the engine, first, the main switch 14 is closed. At this time, since the control switch 25 of the ignition circuit 13 is open, the ignition circuit 13 does not operate. Next, the engine is rotated by operating the kick starter 18A with the foot.

The engine rotation speed is detected by the rotation detector 31 and input to the delay drive circuit 26 of the delay means 27, and when the kick starter 1dA operates, the engine rotation speed increases to a predetermined value or higher, for example, 30 Or, p, When m-hi is reached, the delay drive circuit 26 of the delay means 27 is activated to close the control switch 25 and activate the ignition circuit 13. This also completely prevents stuttering that occurs at low engine speeds immediately after starting, since the engine is already rotating at a certain speed when ignition is started.

In the embodiment shown in FIG. 2, instead of detecting the engine rotation speed, a timer linked to the rotation detector 31 is used, and the control is performed after a predetermined period of time in the same way as shown in FIG. It is also possible to have a configuration in which the switch 25 is closed. Furthermore, the automatic starting device shown in FIG. 1 may be provided with a rotation detection type d-extending means 27 shown in FIG.

(Effects of the Invention) As explained above, according to the present invention, ignition is started after the engine rotation speeds up to a certain extent.
As a result of the effective prevention of stinging, the engine can be started smoothly and damage to the drive system of the starter can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the invention, and FIG. 2 is a circuit diagram showing another embodiment. 13...Ignition circuit, 16...Starter switch, 1
B, 18A... Engine starter, 25... Control switch, 26... Delay drive circuit, 27... Delay means, 31... Rotation detector. Figure 1

Claims (3)

[Claims] (1) An engine starting device characterized in that the ignition circuit of the engine is provided with v-delay means for activating the ignition circuit at a time later than the start of operation of the engine starter. (2) Does the delay means control the operation of the ignition circuit? Co1
2. An engine starting device according to claim 1, comprising a switch and a delay drive circuit that is activated when a starter switch is closed and closes the control switch after a predetermined period of time has elapsed. (3) The delay means receives signals from a control switch that controls the operation of the ignition circuit and a rotation detector that detects the rotation speed of the engine, and when the rotation speed reaches a predetermined value.
An engine starting device according to claim 1, comprising a delay drive circuit for closing said control switch.