JPH09324730A - Remote control engine starter provided with anti-theft function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an engine starter operated by remote control to be installed without any possibility of theft by having a signal for starting an engine outputted when a detection output is supplied from a key insertion detection circuit and ID code is judged to coincide with the regular ID code. SOLUTION: When an engine is started by means of remote control, the engine start signal allotted to its user exclusively is received by a fixing receiver 2 and a peculiar ID code and F code are extracted by the code extraction circuit 6 of a code decoding circuit 5. This one side of extracted ID codes is compared with the standard ID code registered in ID code memory 8 by means of a code comparison circuit 7 and when they coincide with each other, the instruction content in the other side of F code is compared with the code registered in the F code memory 18 by means of a code comparison circuit 7. And when they coincide with each other and respective detected outputs of key switch detection circuit 9 to regular L terminal detection circuit 14 their regular state, an engine start command is outputted to an engine start signal creating circuit 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control engine starter with an antitheft function, which has a function of automatically starting an engine by remote control and an ID (identification, identification) code as an antitheft function. .

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing a conventional engine starter operated by remote control. In the figure, 1 is a portable transmitter of a remote control engine starter, and 2 is an ID code transmitted from a portable transmitter 1. It is a fixed receiver of a remote control engine starter that receives transmission data including the.
Further, 3 is an antenna of the portable transmitter 1, and 4 is an antenna of the fixed receiver 2.

A code decoding circuit 5 decodes the ID code and F (function) code in the received data received by the fixed receiver 2, and the ID code and F code are stored in the ID code memory 8, It is determined whether or not the ID code and the F code registered in advance in the F code memory 18 match.

Therefore, the code decoding circuit 5 extracts the various codes from the received data, and the extracted various codes, that is, the ID code and the F code, in the ID code memory 8 and the F code memory 18. A code comparison circuit 7 is provided for comparing the registered ID code and F code to determine whether they match.

Further, 9 is a key switch detection circuit for detecting whether or not a key is inserted in a key ring of an engine starting ignition switch, 10 is a door switch detection circuit for detecting door closing, and 11 is a parking brake. A parking brake detection circuit for detecting that the vehicle is pulled, a parking range detection circuit 12 for detecting whether or not a gear is in a parking position, and a bonnet hood switch detection circuit for detecting whether or not the bonnet is open. , 14 are regulator L terminal detection circuits for detecting the H level state of the L terminal of the engine starter. The respective detection outputs are input to the code decoding circuit 5, and all of these various outputs are in the normal state (engine and start). It is determined whether or not it is in a condition that satisfies the conditions for

Reference numeral 15 is a signal (F) indicating an engine start command from the portable transmitter 1 to the fixed receiver 2 when an abnormal state is not detected from the detection output and the ID code and the F code match. Code is transmitted, an engine start signal creation circuit that creates an engine start signal including a battery signal, an ignition signal, an accessory switch signal (ACC signal), and a starter signal and outputs the engine start signal to the engine start control circuit 16. .

Reference numeral 17 denotes the engine start control circuit 1
An engine ignition circuit that receives the control output from 6 to control the ignition of the engine. As described above, reference numeral 18 is an F code memory in which a code for decoding the command contents of the engine start is registered.

Next, the operation will be described. In this engine starter, when an engine start signal having an ID code dedicated to the user is transmitted from the portable transmitter 1, this is received by the stationary receiver 2 through the antennas 3 and 4,
The code extraction circuit 6 in the code decoding circuit 5 extracts the specific ID code and F code. The extracted one ID code is compared with the reference ID code registered in the ID code memory 8 by the code comparison circuit 7 and coincides with each other, and the instruction content of the other F code is registered in the F code memory 18. And the code comparison circuit 7 compares them, and if they match, the key switch detection circuit 9 to
An engine start command is input from the code comparison circuit 7 to the engine start signal generation circuit 15 on condition that each detection output of the regulator L terminal detection circuit 14 indicates a normal state.

Therefore, the engine start signal generation circuit 15
Indicates to the engine start control circuit 16 an ignition signal, an ACC (accessory) signal,
A starter signal is output, and based on these outputs, the engine start control circuit 16 outputs an engine ignition signal to the engine ignition circuit 17 to ignite the engine. On the other hand, conventionally, as a device different from the above engine starting device, a vehicle antitheft device generally called an immobilizer that can start the engine only under certain conditions has been provided to prevent the vehicle theft. This has a structure as shown in FIG.

In FIG. 8, reference numeral 21 designates a fixed transceiver 22.
When the electric power is approached to and the induced electric power is received and the electric power exceeds a predetermined value, the ID based on the supplied electric power
A portable transceiver that outputs the code to the fixed transceiver 22, and 23 is a code decoding circuit that extracts the ID code sent from the fixed transceiver 22 from the received data and decodes it. The code decoding circuit 23 includes an ID code extraction circuit 24 for extracting an ID code from the reception data received by the fixed transceiver 22, and an ID code memory 25.
An ID code comparison circuit 26 for comparing the reference ID code registered in the above with the extracted ID code, and an engine start permission signal generation for outputting a start lock release signal which is a control signal of the engine according to the comparison result. It has an ECCS code generation circuit 27 as a circuit.

The code decoding circuit 23 includes an ignition switch detection circuit 28 and an ACC switch detection circuit 29.
Also, the ID code comparison circuit 26 is operated in a predetermined mode based on the state of the detection output from each detection circuit of the key switch detection circuit 30, and when the ID codes match, the EC code is detected.
A start permission signal is output to the CS code generation circuit 27 to enable engine start by manual operation of a key.

Further, 31 is an ECCS code generation circuit 27.
Is an engine start control circuit that outputs an engine start control signal to the engine ignition circuit 32.
Further, 33 and 34 are antennas of the portable transceiver 21 and the fixed transceiver 22.

In this vehicle theft prevention device, for example, when the portable transceiver 21 is housed in the grip portion and the key whose ID data is set in the transceiver 21 is inserted into the key insertion opening of the ignition switch, it is fixed. Transceiver 2
Electric power is inductively supplied from the 2 side to the portable transmitter / receiver 21 side on the key side, and when the induced electric power exceeds a predetermined value, an engine start command having specific ID data is transmitted to the fixed transmitter / receiver 22. To be done. Then, the fixed transceiver 2
2 receives the transmission data including the ID data, inputs it to the code decoding circuit 23, and outputs it to the ID code extraction circuit 2
At 4, the ID code is extracted from the transmission data.

On the other hand, the ID code comparison circuit 26 compares the extracted ID code with a reference ID code registered in the ID code memory 25 in advance. If the ID codes match, the ignition switch is turned on. Detection circuit 2
8, ECCS based on the detection output of each detection circuit of the ACC switch detection circuit 29 and the key switch detection circuit 30
Causes the code generation circuit 27 to output a start lock release signal,
Enables engine start by key operation. For this reason, the engine start control circuit 31 uses the engine ignition circuit 32.
The engine start permission signal is output to and the engine can be ignited. When a key having a different ID code is inserted in the key insertion slot or a key having no ID code is inserted, the ID code comparison circuit 26 cannot match the ID code, so that the engine cannot be obtained. Since the ignition is not permitted, the engine cannot be started even if the key is rotated by manual operation, and the antitheft effect can be obtained.

[0015]

However, when it is attempted to combine the conventional vehicle theft prevention device and engine starting device having the contradictory functions, one of the vehicle theft prevention devices is inserted into the ignition switch. While it determines whether the key is legitimate and enables the engine to be started manually, the other remote engine starter wirelessly starts the engine from a location remote from the vehicle. , The engine was started unattended, and there was always the possibility of vehicle theft.

Therefore, the present invention has been made in view of the above problems, and even in a vehicle equipped with a vehicle antitheft device, the engine starter can be installed by remote control without the possibility of theft. The purpose is to obtain a remote control engine starter with anti-theft function.

[0017]

A remote control engine starter with an anti-theft function according to the present invention includes a door lock operation switch, an engine start operation switch, and any one of the door lock operation switch and the engine start operation switch. A radio circuit for outputting an ID code and a function code as electromagnetic waves based on the above, a key having concave and convex portions corresponding to the ID code, and a key insertion detection circuit for detecting that the key has been inserted into a key cylinder. A receiving circuit for receiving the ID code and the function code from the wireless circuit, and an I received by the receiving circuit.
When the D code is compared with the regular ID code, it is determined that they match each other, and when the function code is supplied, a signal for switching the door lock is output, and the detection output is supplied from the key insertion detection circuit. And the ID
When it is judged that the code matches the regular ID code,
And a code comparison / control circuit for outputting a signal for starting the engine.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. FIG. 1 shows a portable transmitter of a remote control engine starter, and FIG. 3 shows a stationary receiver attached to a vehicle. First, the portable transmitter shown in FIG. 1 will be described. This portable transmitter comprises a transmitter circuit section 50 and an antenna 51, and the transmitter circuit section 50 is constructed as follows.

That is, 52 is a door lock switch (door lock operation switch), 53 is a door unlock switch (door lock operation switch), 54 is an engine start switch (engine start operation switch), and these are respectively described later. It is connected in parallel to the corresponding input terminal of the control unit 61 and in parallel to the corresponding control terminal of the power supply circuit 62 described later. Reference numeral 55 denotes a coil-shaped magnetic field receiving antenna for generating a magnetic field changing at a predetermined frequency from a magnetic field generating antenna 121 mounted around a key insertion port of a steering key cylinder on the vehicle body side, which will be described later.
This is detected by the resonance circuit formed by the coil of the magnetic field receiving antenna 55 and the capacitor 56.

Reference numeral 57 is a magnetic field reception charging control circuit, which converts the AC signal supplied from the resonance circuit into DC and charges the charging capacitor 58. A voltage detection / switch control circuit 59 detects when the voltage value charged in the charging capacitor 58 exceeds a predetermined value and supplies it to a control unit 61 and a power supply circuit 62 described later. A code storage unit 60 stores an ID code and an F code, and when a read signal is received from a control unit 61, which will be described later, the ID code and the F code.
The code is output to the control unit 61.

Reference numeral 64 is a high frequency circuit, which converts an ID code and an F code supplied from a control unit 61, which will be described later, into a high frequency signal and outputs it from the antenna 51. Reference numeral 62 denotes a power supply circuit having a plurality of control terminals, and the door lock switch 52,
When an ON signal associated with the switch operation from either the door unlock switch 53 or the engine start switch 54 is supplied to these control terminals, the electric power from the battery 63 is sent to each circuit section of the portable transmitter. When the supply of electric power is started and the control terminal of the power supply circuit 62 is supplied with an end signal indicating that the transmission to the high-frequency circuit 64 is completed, the electric power is supplied to each circuit unit. Stop to save power.

The control unit 61 is composed of a microcomputer and operates according to the flow chart shown in FIG. That is, the controller 61 is supplied with power from the power supply circuit 62, and when the initialization is completed, the process proceeds to step 100,
It is determined whether or not the door lock switch 52 is turned on. If it is determined that the door lock switch 52 is turned on, the process proceeds to step 140. If it is determined that the door lock switch 52 is not turned on, the process proceeds to next step 110. In step 110, it is determined whether or not the door unlock switch 53 is turned on. If it is determined that the door unlock switch 53 is turned on, the process proceeds to step 140. If it is determined that the door unlock switch 53 is not turned on, the next step 1
Go to 20.

In step 120, it is determined whether the engine start switch 54 has been turned on. If it is determined that the engine start switch 54 has not been turned on, the process returns to step 100, and the above routine is repeated until it is determined that the engine start switch 54 has been turned on. repeat. If it is determined in step 120 that the engine start switch 54 has been turned on, the process proceeds to step 130, where the engine is about to be started by remote control, or the key is inserted into the key cylinder and the engine is about to be started manually. To determine if. That is, when it is determined in step 130 that the signal is not output from the voltage detection / switch control circuit 59 to the control unit 61, it is determined that the engine is about to be started by remote control, and the process proceeds to step 140. When the output signal from the voltage detection / switch control circuit 59 is received and it is determined that the engine is to be started by the key operation, the process proceeds to step 140.
If the key insertion cannot be confirmed in step 130, the process returns to step 100.

At step 140, the F code corresponding to the switch 52, 53, or 54 operated by the switch is read from the code storage section 60, and the ID code is also read. At step 150, the ID code read at step 140, The F code is output to the high frequency circuit 64. After that, the process proceeds to step 160, the control unit 61 outputs a signal to the power supply circuit 62 to stop the power supply to each circuit unit, stops the power supply, and enters the sleep state.

Next, the fixed receiver will be described with reference to FIG. In FIG. 3, reference numeral 105 denotes a code decoding circuit, which is composed of a code extraction circuit 106 and a code comparison / control circuit 107, and is transmitted from the portable transmission device among the reception signals received by the antenna 134 and the reception high-frequency circuit 122. The ID code and the F code are extracted by the code extraction circuit 106, and the ID code and the F code extracted by the code comparison / control circuit 107 are supplied from the ECCS code generation circuit 127 with a signal for starting the code comparison. The ID code and the F code stored in the ID code / F code memory 108 are compared with each other to determine whether the result codes match or not, and which switch is turned on. Is to judge.

The code comparison / control circuit 107 drives the magnetic field until the engine start signal generating circuit 115, which will be described later, outputs an ignition signal (IGN) and then outputs an accessory switch signal (ACC signal). Antenna 121 for generating a magnetic field via circuit 120
(Coil provided around the key insertion port of the ignition key cylinder) is driven at a predetermined frequency,
Outputs electromagnetic waves of a specified frequency.

Further, the code comparison / control circuit 107 is
When the F code extracted by the code extraction circuit 106 is a signal for instructing door lock, the door switch detection circuit 110, the parking brake detection circuit 111, the parking range detection circuit 112, the bonnet hood switch detection circuit 113, and the regulator L terminal. Detection circuit 1
After confirming that various signals from 14 are gathered, the door is locked through the door lock / door unlock / trunk open drive circuit 123.

Furthermore, the code comparison / control circuit 107
When the F code extracted by the code extraction circuit 106 is a signal for instructing door unlock, the door switch detection circuit 110 and the parking brake detection circuit 1
10, after confirming that various signals from the parking range detection circuit 112, the bonnet hood switch detection circuit 113, and the regulator L terminal detection circuit 114 are complete, the door is opened via the door lock / door unlock / trunk open drive circuit 123. Unlock.

Reference numeral 109 is a key switch detection circuit for detecting whether or not a key is inserted in the steering key cylinder, 110 is a door switch detection circuit for detecting the closing of a door, and 111 is a detection of the parking brake being applied. Parking brake detection circuit 112, a parking range detection circuit 112 for detecting whether or not a gear is in the parking position, a bonnet hood switch detection circuit 113 for detecting whether or not the bonnet is open,
Reference numeral 114 denotes a regulator L terminal detection circuit that detects the level state of the L terminal of the regulator. These various detection outputs are input in parallel to the code comparison / control circuit 107,
The code comparison / control circuit 107 determines whether or not these various outputs are output in a predetermined mode to start the engine, and also performs door lock, door unlock, and trunk open. It is judged whether or not to accept.

Reference numeral 115 denotes an engine start signal generation circuit, which is used for the code comparison / control circuit 10 from the code extraction circuit 106.
The ID code supplied to No. 7 is compared with the regular code stored in the ID code / F code memory 108, and it is determined to be regular, and the F code is a signal indicating door lock or door unlock. When the various detection outputs supplied to the code comparison / control circuit 107 are output in a predetermined mode, the determination signals are supplied to the battery signal (BAT).
T), an ignition signal (IGN), an accessory switch signal (ACC signal), and an engine start signal including a starter signal are created and output to the engine start control circuit 131.

Reference numeral 131 denotes an engine start control circuit including a microcomputer. When the ignition switch is turned on and the microcomputer is initialized and operates normally, the engine start control circuit 131 sends the ECCS code generating circuit 127 to The ECCS code generation circuit 127 causes the code comparison / control circuit 107 to output a code comparison start permission signal. Further, the engine start control circuit 131 includes the engine start signal generation circuit 1
When the engine start condition is satisfied by receiving various control outputs from 15 and the comparison end signal from the code comparison / control circuit 107 via the ECCS code generation circuit 127, the engine is started to the engine ignition circuit 132. The signal of is output.

Next, the operation of the code comparison / control circuit 107 will be described with reference to FIG. In FIG. 4, when power is supplied to the fixed receiver, the code comparison / control circuit 1
Step 07 proceeds from the start step 100 to step 110, and in step 110 it is judged whether or not there is a transmission from the portable transmission device based on the output from the code extraction circuit 106, and if there is no output, step 120 Then, it is determined whether or not the ignition switch (not shown) is turned on, and if it is determined that the ignition switch, that is, the key switch is in the off state, the process returns to step 110.

If it is determined in step 120 that the ignition switch, that is, the key switch is in the ON state, the process proceeds to step 130 described below, and the ID code is output from the ECCS code generation circuit 127 based on the instruction from the engine start control circuit 131. The I signal stored in the ID code / F code memory 108 is input by inputting a permission signal for checking and determining whether to start the engine.
The ID code is compared with the D code, and whether or not the engine can be started is determined based on the detection signals from the other detection circuits 109 to 114. Then, the process proceeds to step 140, and the ignition switch, that is, the key switch is detected in step 140. It is determined whether or not the output of the circuit 109 has been switched to the off state. If it is determined that the output has been switched to the off state, the process returns to step 110.

If it is determined in step 110 that the code comparison / control circuit 107 has not been supplied with the ON signal from the key switch detection circuit 109 but has been supplied with the ID code and the F code from the code extraction circuit 106, it will be described later. In step 150, the engine automatic start is started, the door is unlocked, and the like, and the process returns to step 110.

The details of step 150 will be described below with reference to FIG. That is, when the process proceeds to step 150, the process proceeds from step 150A in FIG. 6 to step 150B, and the ID code supplied from the code extraction circuit 106 in step 150B and the ID code
The ID code is compared with the regular ID code stored in the F code memory 108. If they do not match, the process proceeds to step 110, and if they match, the process proceeds to step 150C.

In step 150C, it is determined whether or not the F code supplied from the code extraction circuit 106 together with the ID code is a command for starting the engine by comparing with the stored contents of the ID code / F code memory 108, and the engine is started. If it is not a command for lock, it is judged in step 150D whether or not the F code is a command for locking the door, and if it is judged that it is a command for locking the door, the process proceeds to step 150E to compare and control the code. The circuit 107 is a door lock / unlock drive circuit 1
A signal for locking the door is output to 22 and the process proceeds from step 150E to step 110.

If it is determined in step 150D that the F code is not the command for locking the door, step 1
In step 150F, it is determined whether or not the F code is a command for unlocking the door,
If it is determined that the command is for unlocking the door, the process proceeds to step 150G, where the code comparison / control circuit 10
7 outputs a signal for unlocking the door to the door lock / unlock / trunk open drive circuit 123, and proceeds from step 150G to step 110.

If it is determined in step 150F that the F code is not the command for unlocking the door, the process proceeds to step 150H. In step 150H, it is determined whether the F code is the command for opening the trunk. If it is determined that the command is an open command, the process proceeds to step 150I, where the code comparison / control circuit 1
07 outputs a signal for performing a trunk open to the door lock / unlock / trunk open drive circuit 123, and the process proceeds from step 150I to step 110. If it is determined in step 150H that the command is not for opening the trunk, the process proceeds to step 110, where a signal for opening the trunk is sent from the code comparison / control circuit 107 to the door lock / unlock trunk open drive circuit 123. After outputting the output to the trunk and opening the trunk, the process proceeds to step 110.

Next, in step 150C, when it is determined that the F code supplied from the code extraction circuit 106 is a code for starting the engine, the process proceeds to step 150J, and the detection circuits 109 to 114 execute. If it is determined that the detection signal of No. 1 does not satisfy the condition for starting the engine, the process proceeds to step 110, and if it is determined that the condition is satisfied, the starter is sent from the engine start control circuit 131 to the engine ignition circuit 132 in step 150K. A signal for driving is output, and the process proceeds to step 150L. In step 150L, the code comparison / control circuit 10
7 determines whether or not the engine is started based on the signal from the regulator L terminal detection circuit 114. If it is determined that the engine is started, the starter is stopped in step 150M. Thereafter, in step 150N, it is determined whether or not the idling time has elapsed. If it is determined that the idling time has elapsed, step 15
At 0, a signal for stopping the engine is output, and then the process proceeds to step 110.

Next, step 130 in FIG. 4 will be described with reference to FIG. That is, step 1
When the process proceeds from step 10 to step 130, the process proceeds from step 130A to step 130B, and in step 130B, when the code comparison / control circuit 107 determines that the ECCS code generation circuit 127 has not input a signal instructing to start code verification, In step 130C, it is determined whether or not the fixed time has elapsed, and while it is determined that the fixed time has not elapsed, the process returns to step 130B. If it is determined in step 130C that the fixed time has elapsed, the process proceeds to step 140.

In step 130B, code comparison /
When the control circuit 107 determines that the signal instructing the code collation start is input from the ECCS code generation circuit 127, the process proceeds to step 130D, the signal is supplied to the magnetic field generation drive circuit 120, and the magnetic field generation antenna 12 is generated.
Generate an electromagnetic wave of a certain frequency from 1 and step 13
Go to 0E. In step 130E, the code extraction circuit 1
From 06, it is determined whether or not the ID code or the like is supplied, and if not supplied, wait until a fixed time elapses, that is, generate a magnetic field of a constant frequency for a fixed time, and then through step 130F. Return. When the ID code or the like is supplied, it is not necessary to generate a magnetic field, so the process proceeds to step 130I, the generation of the magnetic field is stopped, and the process proceeds to step 130J.

In step 130J, the code comparison / control circuit 107 compares the ID code supplied from the code extraction circuit 106 with the built-in regular ID code, and the illegal I
If it is determined to be a D code, the process proceeds to step 130H. If it is determined to be a legitimate ID code, step 130 is performed.
In step K, it is determined whether or not a signal instructing the magnetic field generation drive circuit 120 to drive has been output for a certain period of time, and if time has not elapsed, the process proceeds to step 130H. If it is determined in step 130K that the time has elapsed, the process proceeds to step 130L, and the code comparison / control circuit 107 causes the ECCS code generation circuit 12 to operate.
2, the ECCS code generation circuit 127 outputs a signal for supplying an engine start permission signal to the engine start control circuit 131, and then the process proceeds to step 140.

[0043]

As described above, according to the present invention,
With one portable transmitter, door lock, door unlock,
The effect that the engine can be started is exhibited.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a portable transmitter according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the control unit of FIG.

FIG. 3 is an explanatory circuit block diagram of a stationary receiver attached to a vehicle according to an embodiment of the present invention.

FIG. 4 is a schematic explanatory diagram of a flowchart of a code comparison / control circuit and an engine start control circuit in FIG.

FIG. 5 is a detailed flowchart of step 130 in FIG.

FIG. 6 is a detailed flowchart of step 150 in FIG.

FIG. 7 is a circuit block diagram of a conventional remote engine starting device.

FIG. 8 is a circuit block diagram of a conventional vehicle antitheft device.

[Explanation of symbols]

 50 transmitter circuit unit 52, 53, 54 switch 61 control unit 60 storage unit 62 power supply circuit 106 code extraction circuit 107 code comparison / control circuit 115 engine start signal generation circuit 131 engine start control circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area F02N 15/00 F02N 15/00 D

Claims (1)

[Claims] 1. A door lock operation switch, an engine start operation switch, and a wireless circuit for outputting an ID code and a function code as electromagnetic waves based on the switch operation of any one of the door lock operation switch and the engine start operation switch. A key having concaves and convexes corresponding to the ID code, a key insertion detecting circuit for detecting that the key is inserted in a key cylinder, and a receiving circuit for receiving the ID code and the function code from the wireless circuit And the ID code received by the receiving circuit is a regular ID.
It is judged by comparison with the code, and when a function code is supplied, a signal for switching the door lock is output, a detection output is supplied from the key insertion detection circuit, and the ID code is A remote control engine starter with anti-theft function, comprising a code comparison / control circuit that outputs a signal for starting the engine when it is determined that the ID code matches the regular ID code.