JPH0229256Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle engine switch.

[Conventional technology]

In general, the main power supply methods for vehicle engine ignition systems include those that utilize the battery installed in the vehicle, and those that utilize the AC starting force of a flywheel magnet attached to the crankshaft.CDI type, Power is supplied to the ignition coil via a timing circuit such as a transistor type.

For example, in a device that uses the alternating current electromotive force of a flywheel magnet (hereinafter referred to as magnetic ignition), the exciter coil of the ignition energy generation source is short-circuited, and the engine is stopped as the output is not supplied. ing.

That is, the magnetic ignition system is configured as shown in FIGS. 1 to 3, and uses an exciter as an ignition energy generation source installed facing inside the flywheel 13' attached to the crankshaft of the engine E of the motorcycle M. The output from the coil Ce is led to the diode D in the CDI unit 10' which is a timing circuit, where it is half-wave rectified and stored in the capacitor C, and the stored charge is made conductive in response to a signal from an appropriate gate circuit. A thyristor Ds that sets the state leads the potential to the primary coil _C1 of the ignition coil Co, and the potential generated in the primary coil _C1 is further boosted by the secondary coil _C2 , causing the spark plug P to spark.

In this circuit state, the engine can be started at all times, so the engine switch branches the output line _l1 on the way from the exciter coil Ce to the CDI unit 10'.
It leads to one end of a switch element _S1 housed in the engine switch 1', and the other end is grounded.

[The problem that the idea aims to solve]

However, in the above configuration, the exciter coil Ce
A line _L2 branches from the output line _L1 to the engine switch 1', and a line _L3 connects the engine switch 1' to ground (note that this line _L3 connects the body of the engine switch 1' with a conductor). If it is formed and grounded to the vehicle body, the part (not formed) that is exposed from the engine switch will be exposed to the outside. Therefore, even when the ignition system is not working, that is, when the switch element _S1 is closed, the line _L2 or _L3 formed outside the engine switch 1' is disconnected. As a result, the engine can be started easily, and the possibility of theft by an unscrupulous person cannot be denied.

The object of the present invention is to provide a vehicle engine switch that overcomes these drawbacks.

[Means to solve the problem]

The present invention is a switch that changes the connection state of a switch element built into the body by inserting and rotating a key to establish a state of conduction to an engine ignition system, etc., and an ignition energy generation source connected to the switch. , a timing circuit for introducing ignition energy from the ignition energy generation source into the primary side of the ignition coil at a predetermined timing, and a switch element provided between the ignition energy generation source and the timing circuit, The ignition energy from an energy generation source is cut in a predetermined connection state, and the switch element and the timing circuit are integrally housed in the body, and the wiring connected to the switch is connected to the switch element. The present invention is characterized in that the switch element and the timing circuit are configured using a shared line that disables each of the switch elements and the timing circuit when the wiring is disconnected.

[Effect]

Therefore, even if any of the wiring connected to the switch is cut, the engine will not be started because power will not be supplied to the ignition coil.

〔Example〕

The present invention will be described below with reference to FIGS. 4 and 5 for an embodiment of the magnetic ignition type.

In FIG. 4, reference numeral 1 indicates an engine switch, and an insertion hole 4 for a key 3 is formed above a body 2 having a substantially cylindrical shape. Furthermore, in this embodiment, there is a steering lock pin 5 in the middle part.
is provided so that it can appear and retract from the sides. A click ball 6 for holding the rotational position of the key 3 step by step is interposed below it, and a turn plate 7 that rotates as the key 3 rotates is provided below it. The terminal plate 8 is placed below the turn plate 7, and appropriate switch elements formed on both sides are connected and selected to ensure power supply to the engine's ignition system or to control various functions. Close and open the power supply circuit to the pilot lamp and lighting system. These structures themselves may take any suitable structure that is already known.

Furthermore, below this terminal plate 8,
A CDI unit 10 (capacitive discharge circuit unit) is provided as a timing circuit for introducing ignition energy from an ignition energy generation source into the primary side of the ignition coil at a predetermined timing. This CDI unit 1
0 is one in which the circuit elements are integrally molded with a suitable synthetic resin, and the circuit configuration in the CDI unit 10 is as shown in FIG. It includes a diode D that performs wave rectification, a capacitor C that stores the half-wave rectified output, and a thyristor Ds that is supplied with a gate voltage by the output voltage from the pulser coil that detects the ignition timing.

That is, a diode D is connected to the output line _l1 of the exciter coil Ce connected to the engine switch 1, and a capacitor C and an ignition coil are connected in series.
A primary coil C ₁ of Co is connected thereto, and a thyristor Ds is connected in parallel with the exciter coil Ce by branching from the middle between the diode D and the capacitor C.

Further, a line _l2 is branch-connected to the output line _l1 within the engine switch 1, and the switch element _S1 is connected in parallel with the exciter coil Ce.

Then, the CDI unit 10 and the switch element
Body 2 of engine switch 1 is integrated with S _1.
to be contained within. Also, a line _l3 leading to the ground of the switch element _S1 and a line leading to the ground of the thyristor Ds.
Shared track by connecting l ₄ within body 2
_l5 is provided, and the line _l5 is grounded.

Incidentally, this line _l5 can also be formed by separately drawing out a lead wire from the body 2 of the engine switch 1, but if the body 2 is a metal conductor, this shared line _l5 By connecting the engine switch 1 to the body 2, the engine switch 1 can be electrically connected to the vehicle body.

Therefore, in this engine switch 1, since the switch element S ₁ and the CDI unit 10 are housed in the body 2, the switch element S ₁ branched off on the way from the exciter coil Ce to the CDI unit 10 is Since the line _l2 is formed entirely within the engine switch 1, more particularly between the CDI unit 10 and the terminal plate 8, this line _l2 itself is provided inside the engine switch 1. Furthermore, the line on the ground side of switch element _S1
The line _l3 and the line _l4 on the ground side of the thyristor Ds are connected within the body 2 of the engine switch 1, and a shared line _l5 is provided.

Now, to explain the exciter coil Ce, as shown in Fig. 6, the exciter coil Ce
is attached to the crankcase cover 14 so as to face the inside of the flywheel 13 attached to the crankshaft 12, and its lead wire L ₁
is wired from the extraction hole 15 of the crankcase cover 14 to the outside of the engine. In this embodiment, the lead wire L ₁ is retained in the extraction hole 15 by a holding portion 16 that is integrated with the crankcase cover 14 .

This type of lead wire extraction and holding structure is
When molding the crankcase cover 14, processing can be done rationally in that the holding part 16 can be integrally formed using the steps of the die-cutting, and the lead wire _L1 is held in the conventional drawer part. This is preferable because it eliminates the need for a clamp member, etc., which is separately required for the purpose of the present invention, and the number of parts can be reduced.
In addition, the insertion start end 16 of the lead wire L ₁ of this holding part 16
The opening dimension of a is made slightly narrower than the thickness of the lead wire _L1 (including its covering part).
The deformation of the covering portion of _L1 is used to press fit.

This embodiment has the above-described configuration, in which the voltage generated in the exciter coil Ce by engine cranking is stored in the capacitor C of the CDI unit 10 and then discharged to the ignition coil Co. A spark discharges and ignites the engine's air-fuel mixture.

At this time, the line _l2 leading to the switch element _S1 that short-circuits the exciter coil Ce is completely contained within the body 2 of the engine switch 1 and is not exposed to the outside, so this part is cut and the engine cannot be started. It is possible to avoid accidents such as theft caused by theft becoming possible. Furthermore, since the ground side line _l3 of the switch element _S1 is connected to the ground side line _l4 of the thyristor Ds in the body 2 to provide a shared line _l5 , a portion of the line _l5 is drawn out to the outside. When the thyristor Ds, which regulates the ignition timing, is disconnected, the thyristor Ds, which regulates the ignition timing, is also deactivated, the ignition plug P does not spark, and the engine can remain in a state where it cannot be started.

In addition, as a timing circuit, CDI other than the above
Various types such as a type or a transistor type can be used.

[Effect of idea]

As described above, according to the present invention, a timing circuit for introducing ignition energy from an ignition energy generation source into the primary side of the ignition coil at a predetermined timing is provided in the body of the engine switch, and a timing circuit for introducing ignition energy from the ignition energy generation source to the primary side of the ignition coil at a predetermined timing. A switch element that cuts off ignition energy in a predetermined connected state is integrally housed, and the wiring connected to the switch is shared so that the switch element and the timing circuit are each inactivated when the wiring is disconnected. Since the switch is configured with a line that is connected to the switch, even if any of the wires connected to the switch is cut, the ignition system will not be activated, and accidents such as theft can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the wiring configuration of members constituting the ignition system of the engine in a motorcycle;
3 is a circuit diagram showing an example of the ignition system of a conventional engine; FIG. 4 is a vertical side view showing an embodiment of the engine switch of the present invention; and FIG.
The figure is a circuit diagram showing one embodiment of the ignition system of the present invention, FIG. 6 is a longitudinal sectional view showing the assembled state of the exciter coil and flywheel that can be applied to the present invention, and FIG. 7 is the same as that of FIG. - line sectional view. M...Motorcycle, E...Engine, 1...Engine unit, 2...Body, 10...CDI
unit, Ce...exciter coil, Ds...thyristor, _S1 ...switch element.

Claims (1)

[Scope of utility model registration request] In a switch that changes the connection state of a switch element built into the body by inserting and rotating a key to form a conduction state to an engine ignition system, etc., the ignition energy generation source connected to the switch and the ignition energy and a timing circuit for introducing ignition energy from the ignition energy source into the primary side of the ignition coil at a predetermined timing, and a switch element provided between the ignition energy generation source and the timing circuit is configured to introduce ignition energy from the ignition energy generation source to the primary side of the ignition coil. The switch element and the timing circuit are integrally housed in the body, and the wiring connected to the switch is cut off when the wiring is disconnected. An engine switch for a vehicle, characterized in that the switch element and the timing circuit are configured by a shared line in which each of them is inactive.