JPH0942135A - Engine igniter for vehicle with built-in direction indicator control function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at the economization of system miniaturization, cost efficiency and the secureness of its mounting space to a can body and so on by constituting an ignition system and a flash system with the same control unit. SOLUTION: This engine igniter is equipped with a DC power source 1, an engine ignition main circuit part 2, four direction indicators L1 to L4 installed in a vehicle, a three point switch S2 switching the motions of these direction indicators, a direction indicator driving part 3 consisting of a feeder part feeding the three-point switch and the direction indicators with power from the DC power source 1, and a microcomputer part 4 controlling the engine ignition main circuit part 2 and the direction indicator driving part 3, respectively., In this constitution, this microcomputer pant 4 is provided with an ignition timing operation delivery part Ig making an negine speed as a reference, a flashing signal generating part setting each flashing period of these direction indicators L1 to L4, a signal delivery part W driving a semi-conductor switching Q3 into being turned on or off, and a signal regulating part making the flashing period variable or stop an on-off driving signal on the basis of a potential variation in a current detecting resistor R3, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine ignition system having a turn indicator control function.

[0002]

2. Description of the Related Art Conventionally, a capacitor charging / discharging type ignition device (hereinafter referred to as CDI) is used for this type of device, especially for a motorcycle.
Is known, and a pair of turn indicators are mounted on the front, rear, left and right of the wheels, and normal ignition control and blinking control of the turn indicators are independently controlled. As a result, the package of the control system becomes large and the cost rises (2).

[0003]

It is an object of the present invention to provide an apparatus which has an ignition system and a blinking system constituted by the same control unit, and which is intended to be compact, cost-effective, and economical in securing a mounting space for a vehicle body.

[0004]

SUMMARY OF THE INVENTION The present invention controls the ignition timing of a thyristor corresponding to the number of revolutions of the ignition system, that is, the blinking period of a direction indicator, etc., in a ignition system and the microcomputer. -Ignition timing calculation sending unit that sends an ignition signal to the thyristor based on the engine speed as a control unit (control unit), a blinking signal oscillating unit that sets the blinking cycle of the direction indicator, and semiconductor switching the blinking signal. It is characterized in that it has a signal sending section for on / off driving in an earlier cycle, and a signal adjusting section for varying the blinking cycle or stopping the on / off driving signal on the basis of the potential change of the current detection resistor.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram of an embodiment of the present invention, in which 1 is a DC power supply unit, BAT is a battery, S is an input switch, and 2 is an input switch.
Forms a step-up DC-DC converter by a transformer T, a semiconductor switching element Q1 and a rectifying diode D1 in the main ignition circuit, charges its output to a capacitor C, and turns on the thyristor SCR to turn the capacitor C on. The electric charge of is discharged to the ignition coil Ig to perform the ignition operation. Next, 3 is a direction indicator drive unit, and L1 to L4 are direction indicators (lamps), which are front and rear (F, R) and left and right (F, R) of the vehicle body.
R) are provided as a pair respectively, and one of the front and rear lamps (L1, L4 or L2, L3) blinks at a predetermined cycle by switching the contacts (R, L) of the manual switch S2 (three-point switch). Q3 is a semiconductor switching element (MOSFET
R3 is a current detection resistor connected between the DC power source and the manual switch (S2), and power is supplied to the lamps (L1 to L4) via the switch S2 by the on / off operation of Q3. Also, the broken or short-circuited state of the lamps (L1 to L4) is detected by the change in the potential across the resistor R3. Next, 4 is (3) a micro computer unit for controlling the engine ignition main circuit unit 2 and the lamp driving unit 3, which is a micro computer MP.
U is an input section IN for inputting the output of a pulse generator PC for generating an engine speed signal (pulse) to a waveform shaping (WF), and an operation sending section Ig for sending a gate signal to the thyristor SCR. The semiconductor switching elements Q2 and Q3 are turned on / off by a signal sending section W, and the detecting sections AD1 and AD2 which detect the disconnection or short circuit of the lamps L1 to L4 from both ends of the resistor R3.

In the operation of this circuit, when the power supply for operation is supplied from the BAT by first turning on the power switch S1, the converter of the ignition device is activated and the capacitor C is charged with a high voltage. Next, a pulse signal corresponding to the engine rotation is input from the PC through the filter circuit WH to the microcomputer MPU. Microcomputer MPU
Synchronizes with the pulse signal, calculates the ignition timing according to the engine speed, sends out the Ig output, and applies the ignition voltage to the gate of the SCR, so that the electric charge of C is discharged through Ig Coil. To do. Therefore, a high voltage is generated on the secondary side of Ig Coil, and spark discharge is generated in the spark plug. Since the ignition timing characteristic of the ignition device is controlled by the microcomputer, complicated ignition timing control (not shown) can be realized according to the optimum operating condition of the engine.

On the other hand, the control of the turn signal is carried out by the microcomputer by the same program as the ignition timing control. The oscillation output of the turn signal is sent to the W terminal and the transistor Q3 is used as a switch through the transistor Q2 and the switch through R3. S2
Therefore, the operation is to drive the right or left direction indicator lamp. Next, when the direction indicating lamp, for example, the switch S2 is connected to the L side, when the lamps L3 and L4 are blinking and output, and a short circuit occurs between the midpoint N of the switch S2 and GND (load short circuit), the transistor When Q3 is ON (output), the voltage between N and GND is almost 0V. The N terminal voltage at that time is read by the AD2 terminal of the microcomputer, and when the output voltage is lower than the specified voltage, it is determined that the load is short-circuited and the W output of the microcomputer is stopped. (4) If the L3 or L4 lamp is broken in the two lamps, the resistance R3
The current that flows in is about 1/2 of the current when two lights are turned on.
The voltage drop generated at 3 is approximately 1/2 because the current is ½ when the two lights are on. The change (AD1) and (AD2) are detected, the microcomputer processes the program, and the signal to output the oscillation cycle of the MPU W output faster than the oscillation cycle of two lamps is sent. It can be operated to supply a flow.

FIG. 2 shows an example of a flow chart of the control processing of the microcomputer MPU, where N is a timer section constituted by a reference oscillator for operating the MPU,
B is a routine that constitutes the oscillation cycle of the blinking output of the turn signal so that the oscillation waveform as shown in FIG. 3 is output at each time set in a with the timer of n as the reference time. It is configured. B detects the lamp load short-circuit, and branches to H when the load is short-circuited and stops the lamp output. When there is no load short circuit and no load disconnection, it is judged to be normal, the output of FIG. 3 is sent from the W terminal, the transistors Q2 and Q3 are turned on and off, and the lamps L1, L2 or L3, L4 are blinked in a predetermined manner. Flashes in a cycle. The presence or absence of load disconnection can be detected by detecting the current flowing through the load when Q3 is turned on by the voltage drop across R3 and detecting the voltage difference between AD1 and AD2 depending on the difference between normal and disconnection. Has become. When the wire is broken, it is branched into a routine and a branch, and the oscillation cycle of the oscillation is changed to output an output d. E is the ignition control routine, and E is the rotation detection with the timer as the reference time, and the ignition timing preset according to the number of revolutions is calculated by the routine and F, and the ignition output is calculated by the routine and F. It is sent to the Ig terminal to activate the ignition control unit.

[0009]

As is apparent from the above description, according to the present invention, the ignition system and the blinker blinking system can be processed by the processing routine of one microcomputer, and the same package as the ignition device can be used. Since it can be housed in a car, it is economically effective in terms of cost efficiency, cost of mounting a space on the vehicle body, and the like, compared to providing the first unit of the direction indicator.

[Brief description of drawings]

 (5)

FIG. 1 is a circuit diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of an embodiment of the present invention.

FIG. 3 is an oscillation waveform diagram according to an embodiment of the present invention.

[Explanation of symbols]

1 DC power supply part 2 Ignition main circuit part 3 Direction indicator drive part 4 Micro computer part T Transformer SCR thyristor C Capacitor Q1, Q2, Q3 Semiconductor switching element (transistor) S1, S2 switch MPU Micro computer R3 Current detection Resistance L1, L2, L3, L4 Direction indicator (lamp)

Claims (1)

[Claims] 1. An engine ignition circuit in which a capacitor is charged by a DC power supply and a DC-DC converter that boosts the voltage of the DC power supply, and a charged load of the capacitor is discharged to an ignition coil through a thyristor. And direction indicators mounted on the front and rear and left and right of the vehicle,
A three-point switch for switching the left or right operation of the direction indicator, a direction indicator drive unit comprising a power supply unit for supplying power from the DC power source to the three-point switch and the direction indicator via a semiconductor switching element and a current detection resistor; An ignition timing for sending an ignition signal to the thyristor on the basis of the engine speed, which comprises a microcomputer unit for controlling the engine ignition main circuit unit and the direction indicator drive unit. A calculation sending unit, a blinking signal oscillating unit that sets a blinking period of the direction indicator, a signal sending unit that drives the semiconductor switching on and off at a faster period than the blinking signal, and a potential change of the current detection resistor as a reference. , A direction indicator control having a signal adjusting unit for changing the blinking period or for stopping an on / off drive signal The vehicle engine ignition device with a built-in function.