JPS58206879A - Starting control apparatus for vehicle engine - Google Patents

Abstract

PURPOSE:To prevent an engine for a vehicle from being turned at a high speed at the time of starting and resultant impairing of its durability, by providing a switch which is operated when the engine is ready for starting, and rendering an ignition circuit inoperative at the time of starting according to the operational conditions of said switch. CONSTITUTION:In case of starting an engine for a motor cycle, a switch 12 is closed when a throttle valve is opened and a control circuit 10 is connected between a gate circuit 9 and an earth cord 5, so that an ignition circuit is not operated and the engine is not started. On the other hand, in the state that the throttle valve is locked at its fully closed position, the switch 12 is opened and the control circuit 10 is disconnected from between the gate circuit 9 and the earth cord 5, so that the ignition circuit is set into operation and the engine is started. After starting of the engine, the engine speed is increased, so that the ignition circuit continues its normal operation. With such an arrangement, it is enabled to prevent the engine from being turned at a high speed at the time of starting and resultant impairing of its durability.

Description

[Detailed description of the invention] The present invention relates to a starting control device for a vehicle engine.

Conventionally, in vehicles equipped with centrifugal starting clutches, such as motorized two-wheeled vehicles, when the driver opens the throttle wide when starting the engine, the engine rotates at a high speed, which has the disadvantage of impairing the durability of the engine. Ta.

It is an object of the present invention to eliminate such inconveniences of the conventional technology, and the present invention connects to the ignition circuit a control circuit that disables the ignition circuit when starting the engine, and also puts the vehicle in a state where the engine is allowed to start. The present invention is characterized in that a switch is provided which operates accordingly, and the control circuit is inactivated or activated by activation or inactivation of the switch.

Embodiments of the present invention will be explained below with reference to the drawings.

FIG. 1 shows a circuit of one embodiment.

In the figure, (1) is a terminal connected to the exciter coil of the alternator, and this terminal is connected to the ignition coil (4) via a diode (2) and a capacitor (3).
), and there is a gate (
6) is connected to the pulsar coil (
A thyristor (8) (not shown) is connected. The above circuit is a so-called capacitor or discharge type ignition circuit. (9) is a gate circuit that connects the terminal (7) and the gate (6), and OQ is a circuit that includes a resistor (ill) and connects it between the gate circuit (9) and the ground wire, which is ignited when the engine is started. A control circuit that makes the circuit inoperable (1
z is a switch inserted in the control circuit (10), which is interlocked with a stopper that locks the throttle actuating member in the throttle fully closed position, and opens when the throttle is not opened by the stopper. It has become.

Since this embodiment circuit is configured as described above,
When starting the engine of a motorcycle, when the stopper is moved to the unlocked position and the driver opens the throttle with the throttle actuating member, switch I12+ is closed and the ignition circuit is deactivated at the time of starting. The circuit (Lot) is connected between the gate circuit (9) and the ground wire (5).

The pulsar coil voltage corresponding to the engine rotation speed applied to the gate (6) of the thyristor (8) at this time is shown by A in FIG. 8) Since it is lower than the ignition enable voltage Vt, the ignition circuit does not operate,
The engine will not start.

On the other hand, when the throttle operating member is kicked with the stopper locked in the throttle fully closed position, the switch (121 is open and the control circuit 110
) is separated from the gate circuit (9) and the ground wire (5), so it is the same as a normal ignition circuit, and the gate (6) of the thyristor (8) is processed to correspond to the engine rotation speed. The voltage across the pulser coil is shown by line B in FIG. Pulsar voltage ■ at engine rotation iNI during kick is greater than Vt, so the ignition circuit operates and the engine starts. After starting the engine, move the stopper to the steel lock release position and open the throttle with the throttle operating member, the switch 13 closes and the control circuit (101
is connected between the gate circuit (9) and the ground wire (5), and the pulsar coil voltage corresponding to the engine speed shifts to A in Figure 2, but the engine speed has increased (idling speed N, ) Pulsar coil voltage V at that time
Since a2 is greater than Vt, the ignition circuit continues to operate normally.

FIG. 5 is a circuit diagram of another embodiment of the present invention.

In this figure, the same reference numerals as in FIG. 1 indicate the same parts.

(131 is a diode, α is a resistor, these are connected in series, one end of which is connected to the direct reading circuit of the terminal (1) and the diode (2), the resistor (17) connected to the capacitor 1151, and the capacitor α & A series circuit consisting of a resistor (1η) and a transistor u1 connected between the connection point of the capacitor αυ and the terminal (7) connected to the pulser fill, a discharge circuit consisting of a resistor (2ol) and a diode (2]J, and a constant voltage diode ■ is the engine rotation speed detection circuit (25
). (The brain is the gate (6) of the thyristor (8)
) and the ground wire (5), and the pace is a transistor connected to the constant voltage diode (22). This circuit is a control circuit that disables the ignition circuit when the engine is started. (Similar to the switch 2 shown in the first diagram, 121 is a switch that is activated depending on the vehicle's engine starting permissible state. The stopper is read in parallel with the throttle, and when the throttle moving member is urged to the throttle fully closed position, the stopper is closed in conjunction with this, and the stopper is opened when the lock is released.

Since this embodiment circuit is configured as described above, when the stopper moves to the unlocked position and the throttle is opened with the throttle operating member and an attempt is made to start the engine, the switch is activated. is open, so
The output of the engine speed detection circuit makes the transistor 2 conductive and the thyristor (8) non-conductive, so the ignition circuit is not activated and the engine does not start.

That is, since the period of the voltage of the pulser coil of the AC generator is long as shown in a of 14ffi (A) when the engine is started, the □ capacitor (18
The charging time of the transistor A3, the resistor, and the discharging circuit of the diode (2υ of the capacitor αa) is long, so the peak value Va of the charging voltage of the capacitor 18 is as shown in a of Fig. 4 (B). As shown in the figure, the constant voltage diode (becomes larger than the breakdown voltage Vz) conducts it, and the transistor (26+) becomes conductive, making the ignition circuit inoperable. When you try to start the engine with the lock locked, the switch (121) is closed, so the capacitor is short-circuited, and the transistor (121) is not conductive, so the ignition circuit operates normally and the engine starts. When starting the engine, move the stopper to the unlocked position, open the throttle with the throttle actuating member, and put the engine into running condition.The switch (tz) opens, but at this time the engine speed is increasing. The voltage synchronization of the pulser coil is the 4th ffi (A)
As the charging time and discharging time become shorter, the peak value of the charging voltage of the capacitor qa becomes smaller than the breakdown voltage of the constant voltage diode (22), and it does not conduct, so the ignition The circuit works normally.

Note that the switch (121) may be connected in series with the constant voltage diode 12, as shown by 1i in FIG. 3, and opened when the vehicle is in an engine starting permitting state.

In place of the switch a2 in the above embodiment, a switch that is closed or opened when the brake lever is squeezed may be used. Some cars equipped with centrifugal clutches can suppress engine rotation by fixing the drive wheels (
family bike, etc.), in this case, selector switch (121
The structure is simple, just linking it to the brake light switch.

As described above, according to the present invention, a control circuit is connected to the ignition circuit to disable the ignition circuit at the time of starting the engine, and a switch is provided which operates depending on the engine start permissible state of the vehicle. Since the control circuit is deactivated or activated by activation or deactivation, the ignition device is activated only when the vehicle is in a state where the engine can be started, for example, when the throttle is fully closed or the brake is applied. When activated, the engine can be started, and since the engine will not start when it is not suitable for starting, the engine will not rotate at high speeds and the fire resistance of the engine will not be compromised.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is a circuit diagram of another embodiment of the present invention, and FIG.
] (A) and (E) are respectively operation explanatory diagrams of the circuit shown in the third figure. α ■・−・−・Control circuit @・−・−・Power supply circuit (2 滲・−・・−・Charging circuit □□□・・・・−・Engine speed detection circuit (to)・−
... Transistor patent applicant Honda Motor Co., Ltd. 111,
Director Kin Kitamura -- Written amendment to proceedings by two people from one country to another 1. Display of the case 1988 Patent Application No. 88881 2 Title of the invention Vehicle engine start control device 3 Person making the amendment Relationship to the case Patent applicant 532 Honda Motor Co., Ltd. 4 Agent Minato-ku, Tokyo Shinbashi 2-16l New Orihashi Building 7036
002 Patent Attorney Kin Kitamura -;, ' I Telephone number 503-7811 (Main) -5, Date of amendment order (voluntary) 7, Contents of amendment Ll) Figure 1 has been corrected as per the attached sheet
One.

Claims (1)

[Claims] A control circuit that disables the ignition circuit when the engine is started is connected to the ignition circuit, and a switch is provided that operates depending on a vehicle engine starting permissible state, and the control circuit is activated or disabled depending on whether the switch is activated or not. A vehicle engine starting control device characterized by being inoperative or activated.