JP2001336329A - Keyless entry device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a user getting into an automobile without providing a special detection means for a keyless entry device allowing burglarproof properties to be improved by confirming an ID code even in the case of the starting operation of an engine, etc. SOLUTION: A brake pedal or a clutch pedal is appropriated for a human body detecting part 5 for detecting the user getting into the automobile for the purpose of being depressed to allow the engine 8 to be started by detecting the user getting into the automobile. Consequently, the pedal mounted indispensably on the automobile is used for the detection of the user so as to make the composition of the device simple and enable costs to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine start control in a keyless entry device for an automobile.

[0002]

2. Description of the Related Art An automobile which unlocks a lock device when it is detected that an electronic key is within a predetermined distance from a receiver, and locks the lock device when it is not detected that it is within a predetermined distance. A keyless entry device for an electronic device is known, and an electronic key is activated by receiving an activation signal transmitted by electromagnetic induction from a receiver provided in a vehicle, and receives a response signal including an ID code for identification. (See, for example, Japanese Patent Laid-Open No. 9-1).
25776). Such a keyless entry device not only operates the door lock device but also checks the ID code in the operation after the user gets on the vehicle, for example, when starting the engine, thereby preventing theft. Some have improved properties.

[0003] In such a device having an ID code confirmation function after boarding, the engine is started in order to start the engine when it is detected that the user (driver) has boarded. A means for detection is provided, which causes a problem that the configuration of the apparatus becomes complicated and that the cost increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and an object of the present invention is to solve the above-described problem by detecting a ride of a user without providing special detecting means. Things.

[0005]

According to the present invention, there is provided a keyless entry device for an automobile having the above-described structure, wherein a predetermined ID is provided from an electronic key.
When the code is received, and when the user's entry is detected by depressing the brake pedal or the clutch pedal, the engine can be started.

With such a configuration, the user can be detected in the state of the brake pedal or the clutch pedal always provided in the automobile, and there is no need to provide any special detection means, so that the configuration of the apparatus is simple. Becomes
Costs can be reduced. It is not necessary to continue stepping on the pedal after these steps are detected.

Further, the depression of the brake pedal or the clutch pedal is detected by the operation of a stop lamp switch or a clutch switch always provided in the automobile, and the operation is reliably detected by turning on and off the switch. High reliability can be obtained.

[0008]

Next, an embodiment of the present invention will be described. 1 is a block diagram showing the configuration of the entire apparatus and an electronic key, FIG. 2 is a block diagram showing a slightly detailed configuration of a receiver side, FIG. 3 is a plan view of an automobile showing a mounting position of a starting antenna, and FIGS. FIG. 7 is a flowchart showing a control procedure. In the figure, 1 is a keyless entry device according to the present invention, 2 is an electronic key, and 3 is a receiver.

The electronic key 2 is in principle possessed by the user, 21 is an antenna, 22 is an activation detecting unit,
23 is a storage unit, 24 is a transmission circuit, 25 is a power supply unit having a battery 25a, 26 is a control unit, and 27 is a transmission antenna. The antenna 21 is a coil antenna that transmits and receives signals to and from the receiver 3 by electromagnetic induction. When a start signal is received, the energy is transmitted to the control unit 26 via the start detection unit 22 and the control unit 26 is started. By this activation, for example, a semiconductor switch is turned on, and the battery 25a of the power supply unit 25 is connected to the control unit 26. The storage unit 23 stores a predetermined vehicle ID code and a vehicle ID.
The ID code is stored in the transmission circuit 2
4 to the antenna 27, and a radio wave is transmitted to the receiver 3. The control unit 26 has the above-described control function, and is configured using, for example, a microchip or the like.

The receiver 3 is provided in a vehicle, 31 is a starting antenna, 32 is a starting signal generator,
33 is a receiving circuit, 34 is a control unit, and 35 is a receiving antenna. The antenna 31 is a coil antenna for transmitting and receiving signals to and from the electronic key 2 by electromagnetic induction. The antenna 31 transmits a start signal generated by the start signal generating unit 32 to the electronic key 2 and is transmitted from the electronic key 2. When the received ID code is received by the antenna 35, it is input to the control unit 34 via the receiving circuit 33.

The control section 34 has various control functions as described below, and includes a door lock device 4, a human body detection section 5,
The steering lock device 6, the other input / output circuit 7, the engine 8, and the like are connected. The steering lock device 6 is configured using a microcomputer, for example. 34.

The door lock device 4 locks or unlocks the door by driving a latch portion of the door, and includes a lock motor 4a for driving and a lock sensor 4b for detecting a lock state by a lock link switch or the like. . The human body detecting section 5 detects whether or not a user carrying the electronic key 2 has got on the vehicle. The stop lamp switch 5a is used for an automatic car, and the clutch switch 5b is used for a manual car. Used as The steering lock device 6 locks or unlocks the steering by driving a lock shaft, and a detection switch unit 6 for detecting a rotation state of a driving solenoid 6a and an ignition switch.
b etc.

The other input / output circuit 7 includes, for example, a hazard lamp drive circuit 7a, a shift position detection switch 7b, a parking brake switch 7c, and the like. Also,
The engine 8 is provided with a starter 8a. In addition,
The above configuration exemplifies the devices and members necessary for carrying out the present invention. In addition to these, other devices and members necessary for an automobile are provided as appropriate, but they are not directly related to the present invention, and will be described. Is omitted.

In FIG. 3, reference numeral 9 denotes an automobile body, 91 denotes a front door on the driver's seat side, 91a denotes a window glass thereof,
Is a rear door on the driver's seat side, 92a is its window glass, and 93 is a center pillar. The antenna 31 is housed in an appropriate case, for example, and attached to the upper portion of the inner surface of the center pillar 93 on the vehicle interior side. That is, the center pillar 93
The inner surface of the passenger compartment is not covered with an iron plate, and the upper and lower front and rear are made of glass, so that electromagnetic waves of electromagnetic induction are hardly obstructed by the iron plate, and transmission and reception are performed even when the electronic key 2 is outside the vehicle. It is performed without any problem.

It is necessary that the arrival distance of the start signal for the exterior of the vehicle is longer than the arrival distance of the start signal for the interior of the vehicle. For this purpose, measures such as providing a dedicated antenna for each are taken. Is common. However, in this embodiment, when the start signal is transmitted from the receiver 3 to the electronic key 2, a non-modulated start signal is transmitted for the outside of the vehicle, and a modulated start signal is transmitted for the inside of the vehicle. I am trying to do it. Here, the unmodulated signal is a signal of only a carrier, and the modulated signal is a signal modulated to include a predetermined request code (an ID code transmitted from the receiver to the electronic key side). The modulation method is arbitrary.

When the electronic key 2 is outside the cabin, there is no need to identify the request code, and it is sufficient that the control unit 26 can first receive a start signal strong enough to start.
For this reason, the unmodulated start signal output from the receiver 3 may be extremely weak, and the reach of the start signal for outside the vehicle compartment is substantially large. It is shared with the passenger compartment. Accordingly, only one mounting space is required, and a relatively large space for mounting the antenna can be secured in the center pillar 93. Therefore, a relatively large and high-output coil antenna is used as the antenna 31. You can do it.

Next, the operation and control procedure of the above-described apparatus will be described with reference to the flowcharts shown in FIG. FIG.
Is a flowchart on the electronic key 2 side, and FIGS. 5 to 7 are flowcharts on the receiver 3 side.

Steps S11 and S12 in FIG.
In the standby state, the receiver 3 generates a non-modulated start signal for the outside of the vehicle in the start signal generating section 32, and transmits the signal from the antenna 31 at intervals of, for example, 3 seconds. On the other hand, the power required to receive the activation signal is supplied to the control unit 26 of the electronic key 2, and the user carrying the electronic key 2 approaches the vehicle as shown in FIG. When the key 2 receives a start signal of electromagnetic waves due to electromagnetic induction from the receiver 3 (step S1), the control unit 26
Is activated and the power supply unit 25 is connected to the control unit 26 (step S2). As a result, the control unit 26 can perform a normal operation. If the received activation signal is a modulated one for the vehicle interior, the control unit 26 transmits a predetermined in-vehicle ID code. If there is, a predetermined ID code for outside the vehicle is transmitted (step S3). Then, step S1
Return to

FIG. 5 shows a procedure when the door is unlocked. The receiver 3 operates the electronic key 2 as described above.
The standby state is continued until the ID code issued by (1) is received (steps S11 and S12). When the ID code is received, it is determined whether or not the ID code matches the external ID code (step S13). If so, the process proceeds to step S14, and if not, the process returns to step S11.

In step S14, an unlock signal is output to the door lock device 4 for, for example, 0.5 second, the lock motor 4a is driven in the unlock direction to unlock the door, and the lock sensor 4b outputs the signal. A signal indicating that the lock device 4 has changed from the locked state to the unlocked state is sent to the receiver 3. Then, in step S15, the hazard lamp 7a is operated and turned on or blinked for a predetermined time to notify the user of the unlock. In addition,
If the unlocked state is already established during this operation, the operation of the hazard lamp 7a is not performed.

FIG. 6 shows a procedure when the door is opened and closed after the unlocking operation. First, in step S21, it is determined whether or not the door is opened. If the door is opened, the output interval of the unmodulated activation signal is, for example, 0.5 seconds (step S22), and whether the ID code matches that for outside the vehicle is used. It is determined whether or not it is (step S23). The reason why the output interval of the activation signal is shortened is to ensure that the electronic key 2 is within the communication area. Then, the process proceeds to step S24 or step S25, and the procedure of the loop returning to step S22 is repeated until the door is closed. If the door is closed with the codes matched, the user has boarded or is near the door. If it is determined that the door is closed in the state and the procedure proceeds to FIG. 7, if the code is not matched or the door is closed in a state where the code cannot be read, it is determined that a person other than the user has closed the door and the step is performed. The process returns to the standby state of S11.

If the user leaves the vehicle without opening the door in step S21, the process proceeds to step S21.
Proceed to 26. In this case, since the ID code cannot be collated because the electronic key 2 is longer than the reach distance, the process proceeds to step S27 after a certain period of time, for example, 4 seconds, and the lock signal is output for 0.5 seconds, for example. 4a is driven in the locking direction to lock the door again. Further, a signal is output from the lock sensor 4b indicating that the lock device 4 has changed from the unlocked state to the locked state. Then, in step S28, the hazard lamp 7a is operated to notify that it is locked, and the process returns to the standby state in step S11. Note that, when the operation is already in the locked state, the operation of the hazard lamp 7a is not performed.

FIG. 7 shows the procedure after the door is determined to be closed in step S24. First, the human body detecting section 5 detects that the user has boarded,
The signal is input to the receiver 3 (Step S31).
This example is a case of an automatic car, and the boarding is detected based on the state of the brake that is always operated when the engine is started. When the stop lamp switch 5a of the human body detection unit 5 is turned on, step S32 is performed.
The start signal is continuously output instead of the modulated signal for the vehicle interior. At this time, since the electronic key 2 is placed in the user's chest pocket or the like and is located near the antenna 31 of the receiver 3, the modulated start signal output from the antenna 31 for the vehicle compartment is surely provided. Received.

In response to this, the in-vehicle ID code is transmitted from the electronic key 2 in step S3 of FIG. 4, and it is determined in step S33 whether the ID code matches the in-vehicle ID code. If they do not match, the process returns to the standby state of step S11.
Proceed to 34. Until the brake is depressed after the boarding, the procedure of the loop returning from step S31 to step S31 through step S42 and step S24 is repeated.

In step S34, the state of the shift lever and the parking brake is determined by the shift position detection switch 7b and the parking brake switch 7c of the other input / output circuit 7, and the shift lever is in the parking position.
When the parking brake is applied, the solenoid 6a of the steering lock device 6 is driven and unlocked (step S35). Subsequently, the switch section 6b
Detects the turning state of the ignition switch (step S36). If the ignition switch has been turned to the start position and the engine is in the start mode, the ID code is confirmed again in step S37. If the ID code matches, the engine start permission signal is controlled. The output from the section 34 drives the starter 8a, and the engine 8 starts. As described above, the ID code is confirmed twice when the door is unlocked and when the engine is started, so that high anti-theft property is realized. If the ID codes do not match, the process returns to the standby state of step S11.

After the start of the engine 8, no start signal is required, and the engine 8 is stopped to prevent malfunction (step S38), and this state is continued until the engine is stopped (step S39). When the engine 8 stops, the output of the non-modulated start signal is restarted at, for example, 0.5 second intervals in step S40, and the process returns to step S31 to repeat the subsequent procedures. Here, if the shift lever is not at the parking position in step S34, the parking brake is not applied, or if the vehicle is not in the start mode in step S36, the process proceeds to step S41. If the stop lamp switch 5a is on, the process returns to step S34 and the subsequent steps are repeated. If not, the procedure from step S40 is repeated.

Next, if the user leaves the vehicle after driving, the brakes are not depressed and the process proceeds from step S31 to step S42. Until the door is opened, the procedure of the loop returning to step S31 via step S42 and step S24 is repeated. When the door is opened, the procedure of the loop returning from step S24 to step S22 via step S22 and step S23 is repeated. Repeated.

Here, when the user goes out of the vehicle and closes the door, step S24, step S31, step S42.
The procedure of the loop that returns to step S24 through the process continues for a while, but when the electronic key 2 moves away from the user and the ID code cannot be collated, the electronic key 2 is then set to a predetermined time, for example, 4 seconds.
After a lapse of seconds, the process proceeds to step S43, where a lock signal is output, the lock motor 4a is driven in the lock direction, and the door is locked. Further, the lock sensor 4b outputs the lock device 4
A signal is output from the unlocked state to the locked state, and after the hazard lamp 7a is operated in step S44 to notify that the state has been locked, step S11 is performed.
Return to standby state. Note that, when the operation is already in the locked state, the operation of the hazard lamp 7a is not performed.

[0029]

As is apparent from the above description, the keyless entry device according to the present invention uses a predetermined key from an electronic key.
The engine can be started in a state where the D code is received and when the user's entry is detected by depressing the brake pedal or the clutch pedal. Therefore, the brake pedal or the clutch pedal, which is always provided in the automobile, is used for detecting the user, and it is not necessary to provide any special detecting means. Therefore, the configuration of the apparatus can be simplified and the cost can be reduced. Becomes

Further, when the depression of the brake pedal or the clutch pedal is detected by the operation of a stop lamp switch or a clutch switch always provided in the automobile, the depression is surely detected by turning on and off the switch. High reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the entire keyless entry device according to the present invention and the configuration of an electronic key.

FIG. 2 is a block diagram on the receiver side of the above device.

FIG. 3 is a plan view of the automobile showing a mounting position of a starting antenna of the above device.

FIG. 4 is a flowchart showing a procedure of an operation of the electronic key in the above device.

FIG. 5 is a flowchart showing a part of the operation procedure of the above receiver.

FIG. 6 is a flowchart showing a part of the procedure of the operation of the receiver.

FIG. 7 is a flowchart showing a part of the operation procedure of the receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyless entry apparatus for vehicles 2 Electronic key 21 Antenna 26 Control part 3 Receiver 31 Antenna for starting 34 Control part 4 Door lock device 5 Human body detection part 5a Stop lamp switch 5b Clutch switch 8 Engine

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Claims (2)

[Claims] When the electronic key is detected within a predetermined distance from the receiver, the lock device is unlocked, and when the electronic key is not detected within the predetermined distance, the lock device is locked. In a keyless entry device for an automobile, when a predetermined ID code is received from an electronic key, and when a user's entry is detected by depression of a brake pedal or a clutch pedal, an engine can be started. A keyless entry device for a motor vehicle, characterized in that it is configured to 2. The vehicle keyless entry device according to claim 1, wherein the depression of the brake pedal or the clutch pedal is detected by the operation of a stop lamp switch or a clutch switch.