JPH0455180A - Burglar preventing device for autocycle - Google Patents

Abstract

PURPOSE:To hinder starting of an engine at the time of connecting a battery and an ignition device directly to prevent burglar by inputting multiple power source voltages from an ignition switch to an ignition device, and detecting a difference of the voltage between multiple power source voltages. CONSTITUTION:Power source voltages of (a), (b) are input from an ignition switch 2 to an A/D converter 4. (a) inputs the battery voltage in direct connection with a battery 1, and (b) inputs the voltage, which is divided from the battery voltage by a resistance, through a resistance 10 inside of the ignition switch 2. The A/D converter 4 converts the voltage input from (a), (b) to A/D, and a difference of the voltage is compared by a microcomputer 5. When a difference of the voltage is normal, an engine is started, and when a difference of the voltage is abnormal, starting of the engine can be stopped.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an anti-theft device for determining whether or not the engine can be started by detecting the method of supplying power voltage to the ignition device in an ignition device for a motorcycle. Regarding.

[Conventional technology]

Although there is no corresponding problem in the conventional technology, the Utility Model Application Publication No. 62-522 is used as a motorcycle engine stop circuit.
Some, such as No. 79, have multiple switches.

[Problem to be solved by the invention]

In the above conventional technology, when the engine is stopped, turning on a stop switch causes other switches to be linked to shut off the ignition device and the power supply source.

The present invention provides engine ignition when starting the engine.

The purpose is to determine whether to stop. Therefore, the purpose is to prevent theft by detecting that the connection between the ignition device and the power supply voltage source (battery) has been artificially made manually, and preventing the engine from starting.

[Means to solve the problem]

The above purpose is to connect the ignition device and the power supply voltage supply source (battery) to one
This can be achieved by using one voltage as the battery voltage and the other as a voltage obtained by dividing the battery voltage, and detecting the difference between the two voltages only for a certain period of time.

[Effect]

The ignition system operates by detecting the voltage difference between multiple voltage sources to the ignition system based on the voltage input from the power supply voltage supply source (Batch January).As a result, when the voltage difference is normal, the engine is started, and when the voltage difference is In the event of an abnormality, engine starting can be stopped.

〔Example〕

An embodiment of the present invention will be described below.

FIG. 1 shows a wiring diagram of a motorcycle ignition system.

The battery 1 is the power supply source for the entire system, the ignition switch 2 controls the power supply connection between the battery 1 and the ignition device, the crank reference position detector 3 detects the reference position of the crank, and the reference number 4 A/D converter 5 compares the two power supply voltages from the ignition switch,
This is a microcomputer that has a function to determine whether or not the engine cannot be started, and a calculation function to detect the engine speed based on the signal from the crank reference position detector, calculate the ignition timing, and output an ignition signal based on the calculation result. . 6
7 is a logic circuit, 7 is a switching element for turning on and off the ignition coil 8, and 9 is a spark plug.

FIG. 2 shows the internal configuration of the second ignition switch. From the ignition switch to A/D converter 4 a, b
Enter the power supply voltage. a is the battery voltage due to direct battery connection, b is the 10% voltage inside the ignition switch.
A voltage obtained by dividing the battery voltage by the resistors is input through the resistors.

A/D converter 4 converts the voltage input from a and b into an A/D converter.
D conversion is performed, and the difference in voltage is compared by the microcomputer No. 5.

Next, the operation will be explained with reference to FIG.

This operation starts at the time when the power supply voltage is supplied to the ignition device. Note that this operation can also be started by inputting either a or b from the ignition switch. first,
In order to confirm abnormal operation of the ignition switch, abnormality determination times 1 and 1 are set in advance. In other words, the input abnormality of the ignition switch is determined for only time t1 after the start of the main operation. Step 1. In OO, the elapsed time is determined and if the elapsed time is 11 or more, the abnormality detection process is ended and step 1
The program jumps to 06 and performs engine start control, and starts the engine after detecting the pulsar reference position. Further, if the determination time is t1, the process jumps to step 101. Steps 101 and 102
Now, the voltages a and b input from the ignition switch
A/D conversion is performed. Step 101 is the battery voltage a, and step 102 is the A/D conversion of the divided battery voltage. In step 103, A
The voltage difference between the /D-converted voltages a and b is determined.

The resistance R in the ignition switch is determined in advance, and the range α to β of the voltage difference between a and b is set in consideration of variations in the elements in the ignition system. As a result, a, b
If the voltage difference is within the range α-β, the process returns to step 100, the elapsed time is determined again, and the voltage difference is checked. Moreover, if the potential difference between a and b is outside the range of α-β,
Jumping to step 104, it is determined whether there is an abnormal voltage difference between a and b. Here, for a fail-safe against voltage changes, a check time t2 is set for determining that an abnormal input to the ignition switch occurs when an abnormal voltage difference state continues for a certain period of time or more. Therefore, in step 104, it is determined whether there is an abnormality in the voltage difference between a and b, and it is determined whether the abnormality has continued for t2 or longer. Therefore, if the abnormal voltage difference duration time between a and b is 2 or less, the process returns to step 100. Here, if the abnormality duration is longer than t2, the process jumps to step 105 and engine starting is stopped.

Through the above processing, when the power supply voltage is applied to the ignition device, it is determined whether or not the engine can be started based on the difference between the input voltages a and b from the ignition switch.

〔Effect of the invention〕

According to the present invention, in the anti-theft device for a motorcycle,
Theft can be detected by directly connecting the battery and the ignition device without using an ignition switch, and theft can be prevented by disabling the engine from starting.

Also, by manually making a pseudo connection (connection of two wires),
Theft can be prevented by providing instantaneous determination at the time of connection.

[Brief explanation of the drawing]

FIG. 1 is a wiring diagram of a motorcycle ignition system according to an embodiment of the present invention, FIG. 2 is an internal configuration diagram of an ignition switch, and FIG. 3 is a flow chart of this control. 1...Battery, 2...Ignition switch, 3
・・・Crank reference position detector, 4・A/D converter, 5
Microcomputer, 6. Logic circuit, 7. Switching element, 8. Ignition coil, 9. Spark plug.

Claims (1)

[Claims] 1. An ignition system for a motorcycle that includes a battery that supplies power supply voltage, a crank reference detector that detects the reference position of the crank, and an ignition switch that connects the battery to its supplier, By inputting multiple power supply voltages from the ignition switch to the ignition system and detecting the voltage difference between the multiple power supply voltages, it is possible to prevent the engine from starting when the battery and ignition system are connected directly. Features: Anti-theft device for motorcycles. 2. The automatic device according to claim 1, characterized in that it determines whether or not the engine is started by determining the detection timing of the input voltage difference between each power supply voltage for multiple connections between the battery and the ignition device. 2 Anti-theft device for vehicles.