JP3580530B2 - Smart entry system for vehicles - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, an identification code signal transmitted from a main key inserted into a key insertion portion of an ignition switch in a vehicle compartment by unlocking / locking a door by approaching / separating a vehicle carrying a portable device from / to a vehicle. With a code content registered in advance, and if the two match, the ignition switch can be turned.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a car, a keyless entry system that locks / unlocks a key without inserting the key into a door lock by receiving a transmission signal from the key by a receiver on the vehicle side has been put into practical use. As described in Japanese Patent Application Laid-Open No. 5-106376, a system called a smart entry that allows a driver to unlock / lock a door by approaching / separating from a vehicle with a portable device. Is being developed.
[0003]
On the other hand, as a safety measure against vehicle theft, for example, as described in Japanese Patent Application Laid-Open No. H10-297432, a unique ID code is stored in a tag (or card key) carried by a driver and transmitted from the tag by a radio signal. There are various systems with a so-called immobilization function that allows the ignition switch to be operated only when the ID code read by the receiver on the vehicle side matches the ID code registered on the vehicle side. Is being developed.
[0004]
Furthermore, recently, a smart entry system having both the above-described smart entry function and immobilization function has been proposed. In this type of smart entry system, a smart entry ECU including a microcomputer or the like that controls the entire system recognizes the approach / separation of the user carrying the portable device from / to the vehicle, unlocks / locks the door, and performs vehicle unlocking. The smart entry ECU receives an identification code signal transmitted from a portable device or a main key that is removably inserted into a key cylinder of an ignition switch indoors, and compares the code content with a pre-registered code content. If they match, the ignition switch is made rotatable.
[0005]
By the way, this smart entry system is usually provided with a failure diagnosis function, a test terminal connected to a failure diagnosis device as a service tool is provided in the smart entry ECU, and a state in which the failure diagnosis device is connected to this test terminal. Then, the diagnosis is performed in the following procedure, for example.
[0006]
That is, as shown in FIG. 4, when the ignition switch is off (S1), the main key is inserted into the key cylinder of the ignition switch (S2), and then the smart entry ECU is tested within a predetermined time (for example, 10 seconds). When the failure diagnosis device is connected to the terminal and the test terminal is turned on (S3), diagnosis of the door lock / unlock function by the smart entry is started (S4). At this time, when the failure diagnosis device is connected to the test terminal, the test terminal is grounded (GND) by an internal circuit of the failure diagnosis device and the test terminal is turned on. Shift to failure diagnosis mode.
[0007]
When the diagnosis of the door lock / unlock function by the smart entry is completed (S5), the ignition switch is turned on (S6), so that the diagnosis of the immobilization function is started (S7), and the diagnosis of the immobilization function is performed. When the test ends (S8), the connection between the test terminal and the failure diagnosis device is released, the test terminal is turned off (S9), and the failure diagnosis mode ends.
[0008]
This failure diagnosis device is generally provided with an indicator lamp composed of a light emitting diode, and a blinking drive signal is output from the device. If there is no failure, the indicator lamp repeats blinking at a fixed cycle. The indicator lamp flashes in response to a flashing drive signal in a corresponding code format, and the content of the failure can be known by reading the code according to the flashing pattern.
[0009]
[Problems to be solved by the invention]
However, in the case of the above configuration, if the test terminal is short-circuited and grounded (GND) in a circuit due to a wiring trouble of the smart entry system, the failure diagnosis device is connected to the test terminal. In spite of this, there is a problem that the smart entry ECU shifts to the failure diagnosis mode and the system does not operate normally.
[0010]
Further, in the above-described failure diagnosis mode, it is not known when the diagnosis of the door lock / unlock function by the smart entry has started or ended, and particularly when the end timing is unknown, it is necessary to start the diagnosis of the immobilization function. There is also a problem that useless time is wasted without knowing when to turn on the ignition switch, and the working time in the failure diagnosis mode is prolonged.
[0011]
The problem to be solved by the present invention is to enable the system to operate normally even when a short circuit of the test terminal occurs, and to notify the start and end of the diagnosis of the door lock / unlock function in the failure diagnosis mode. Is to do.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, a vehicle smart entry system according to the present invention recognizes, by a control unit, the approach / separation of a portable device from / to a vehicle, and controls the door lock drive unit by the control unit to open and close the door. with locking / comprises a row cormorants door lock / unlock function, the portable device at the vehicle compartment having an ignition switch key cylinder is provided, or the main key to be inserted freely inserted drop to the ignition switch of the key cylinder The control unit receives the identification code signal transmitted from the control unit, compares the code content with a pre-registered code content, and has an immobilization function that allows the ignition switch to rotate if the two match. in the smart entry system for a vehicle, it is connected to the internal circuitry of the fault diagnosis apparatus Provided a test terminal to the control unit, the auxiliary switch which is turned on when pushing the key cylinder in the ignition switch is provided, wherein the test pin, intended to be grounded to be connected to the internal circuitry of the fault diagnosis apparatus, the The control unit shifts to the failure diagnosis mode on condition that the test terminal is grounded and the auxiliary switch is turned on a plurality of times within a predetermined time from the grounding .
[0013]
According to such a configuration, the mode is shifted to the failure diagnosis mode on condition that the auxiliary switch is turned on a plurality of times within a predetermined time in advance. Even if it is in a state of being grounded (GND), it can be prevented from shifting to the failure diagnosis mode without permission, and the system can be operated normally.
[0014]
Further, when the vehicle smart entry system according to the present invention shifts to the failure diagnosis mode, diagnosis of the door lock / unlock function is started while the ignition switch is turned off, and the ignition switch is rotated by an operator. When the ignition switch is turned on and the ignition switch is turned on, the diagnosis of the immobilization function is started, and the control unit starts the diagnosis of the door lock / unlock function in the failure diagnosis mode and ends the diagnosis. Sometimes, the door lock drive unit is controlled to notify the start and end of the diagnosis by repeating the lock / unlock of the door a plurality of times.
[0015]
According to such a configuration, in the failure diagnosis mode, the diagnosis of the door lock / unlock function is started while the ignition switch is off, and the ignition switch is rotated by an operator to turn on the ignition switch. Then, the diagnosis of the immobilization function is started. Here, the door lock / unlock is repeated a plurality of times at the start and end of the diagnosis of the door lock / unlock function, so that the timing of the start and end of the diagnosis can be easily grasped.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 is a block diagram, FIG. 2 is an operation explanatory diagram, and FIG. 3 is a flowchart for operation explanation.
[0017]
As shown in FIG. 1, a driver carrying an electronic card key 1 as a card-type portable device transmits a transmission area of an outdoor detection antenna 2 incorporated in, for example, a driver side door mirror of a vehicle (not shown). Once inside, the electronic card key 1 receives an activation signal transmitted from the smart entry ECU 3 via the outdoor detection antenna 2 and activates the electronic card key 1. At this time, the transmission area of the outdoor detection antenna 2 is substantially limited to the vicinity of the door on the driver's seat side due to its output power.
[0018]
Then, a signal for unlocking by a radio signal is transmitted from the activated electronic card key 1, and this signal is received by the smart entry tuner 4, and the smart entry ECU 3 receives this signal, that is, the vehicle of the electronic card key 1 When the approach to the door is recognized, the door lock ECU 5 is controlled, the door lock motor 6 is driven to unlock the door, and the door is unlocked. Here, the door lock ECU 5 and the door lock motor 6 constitute a door lock drive unit.
[0019]
On the other hand, when the driver carrying the electronic card key 1 goes out of the transmission area of the outdoor detection antenna 2, the door is closed and the electronic card key 1 goes out of the transmission area. Under the conditions, the smart entry ECU 3 recognizes the separation of the electronic card key 1 from the vehicle, controls the door lock ECU 5, drives the door lock motor 6 to lock the door, and locks the door.
[0020]
By the way, when the driver sits on the driver's seat with the electronic card key 1, the smart entry ECU 3 receives an immobilization function (hereinafter, referred to as an immobilization function) from the smart entry ECU 3 via the indoor detection antenna 8 embedded in the driver's seat. Is continuously transmitted for the set time, and the electronic card key 1 receives the activation signal to activate the immobilizer function of the electronic card key 1.
[0021]
At this time, when the start signal is transmitted through the indoor detection antenna 8, the transmission of the start signal from the outdoor detection antenna 2 is stopped, and the start signal is provided in an ignition switch (hereinafter, referred to as an IG switch). When an ignition knob, which will be described later, is returned to the OFF position or the main key is removed, an activation signal is transmitted again from the outdoor detection antenna 2.
[0022]
Then, a preset ID code signal is transmitted from the electronic card key 1, the ID code signal is received by the smart entry tuner 4, and the code content of the received ID code signal and the smart entry ECU 3 are received by the smart entry ECU 3. The contents of the ID code registered in advance in the ROM or the like are collated, and if they match, the solenoid 9 for preventing the rotation of the ignition knob is excited by the smart entry ECU 3, and the key of the IG switch is excited by the excitation of the solenoid 9. The locking pin locked to the cylinder is released, and the ignition knob becomes rotatable.
[0023]
Here, the ignition knob has an operation knob formed in a key insertion portion of a key cylinder of the IG switch so that the ignition knob can be operated without inserting a main key described later. Therefore, the IG switch is turned from the OFF position to the ACC (accessory) position, and the IGON (ignition), similarly to the case where the main key is inserted into a normal key cylinder and then slightly pressed and turned while being turned. It becomes possible to rotate to the START position via the (ON) position.
[0024]
On the other hand, the IG switch can be operated by the main key 11, and when the main key 11 is inserted into the key cylinder of the IG switch, an ID code signal is transmitted from an ID code transmitter built in the main key 11, and the ID code is transmitted. The code signal is received by the smart entry ECU 3 via the immobilizer antenna 12 provided near the IG switch.
[0025]
Then, similarly to the case of the ID code signal from the electronic card key 1 described above, the code content of the received ID code signal from the main key 11 and the code content of the ID code signal received from the main key 11 are previously registered in the built-in ROM or the like of the smart entry ECU 3. The contents of the ID code are collated with each other, and if they match, the smart knob ECU 3 excites the solenoid 9 for preventing the rotation of the ignition knob, and the IG switch becomes rotatable.
[0026]
By the way, the IG switch is provided with an auxiliary switch 15 which is turned on in conjunction with the depression of the key cylinder, and the smart entry ECU 3 is provided with a test terminal 16 which is connected to a failure diagnostic device which is a service tool as in the related art. When the auxiliary switch 15 is turned on three times, which is a predetermined number of times within a predetermined time (for example, 10 seconds) in a state where the failure diagnosis device is connected to the test terminal 16, the smart entry ECU 3 Shifts to the failure diagnosis mode.
[0027]
Further, the smart entry ECU 3 repeats the reversal of the lock / unlock of the door twice at the start and the end of the diagnosis of the door lock / unlock function by the smart entry in the failure diagnosis mode to notify the start and the end of the diagnosis. The door lock ECU 5 is controlled to drive the door lock motor 6. The process of shifting the failure diagnosis mode by the smart entry ECU 3 corresponds to a control unit.
[0028]
In FIG. 1, reference numeral 20 denotes a courtesy switch that is turned on and off in response to opening and closing of a door to control turning on and off of a courtesy lamp, and 21 is a door that is turned on and off in accordance with locking and unlocking of the door. A lock switch, 22 is a key insertion switch for detecting insertion of the main key 11 into the IG switch, 23 is a warning buzzer for notifying that forgetting to return the ignition knob to the OFF position and forgetting to remove the main key 11, and 24 is an EFI (electronic ECU for the fuel injection device).
[0029]
By the way, the failure diagnosis device is provided with an indicator lamp composed of a light emitting diode, and this device outputs a blinking drive signal having a different code content depending on the presence or absence of a failure and the content of the failure.
[0030]
That is, when there is no failure, as shown in FIG. 2 (a), when the test terminal 16 is grounded (GND) and is in the ON state, a blinking drive signal that is inverted to high and low at a fixed cycle from the failure diagnosis device is issued. And the indicator lamp repeats blinking at a constant cycle as shown in FIG.
[0031]
On the other hand, if there is a failure, a failure code corresponding to the failure content is assigned in advance, and the failure diagnosis device outputs a blinking drive signal that is inverted to high or low according to the content of the code representing the failure content, and the same. As shown in FIG. 5C, the indicator lamp blinks by such a blinking drive signal, and the contents of the failure can be known by reading the code according to the blinking pattern.
[0032]
Next, the transition operation of the failure diagnosis mode will be described with reference to the flowchart of FIG.
[0033]
As shown in FIG. 3, when the IG switch is off (S21), the main key 11 is inserted into the key cylinder of the IG switch (S22), and then the test terminal of the smart entry ECU 3 within a predetermined time (for example, 10 seconds). The failure diagnosis device is connected to the test terminal 16 and the test terminal 16 is turned on (S23). The auxiliary switch 15 is turned on three times within a predetermined time (for example, 10 seconds) after the test terminal 16 is turned on (S24). Diagnosis of the door lock / unlock function by the smart entry is started (S25).
[0034]
At this time, when the failure diagnosis device is connected to the test terminal 16, the test terminal 16 is grounded (GND) by an internal circuit of the failure diagnosis device and is turned on. When the test terminal 16 is turned on, the smart entry ECU 3 turns on the system. Is ready for failure diagnosis.
[0035]
When the door lock / unlock function diagnosis by the smart entry is started, the door lock ECU 5 is controlled by the smart entry ECU 3, the door lock motor 6 is driven, and the operation of reversing the lock / unlock of the door is repeated twice. , The start of the diagnosis of the door lock / unlock function by the smart entry is notified.
[0036]
Then, when the diagnosis of the door lock / unlock function by the smart entry is completed (S26), the door lock ECU 5 is controlled by the smart entry ECU 3 again, and the door lock motor 6 is driven to reverse the lock / unlock of the door. The operation is repeated twice, and the end of the diagnosis of the door lock / unlock function by the smart entry is notified.
[0037]
Thereafter, when the IG switch is turned on (S27), the diagnosis of the immobilizer function is started (S28). When the diagnosis of the immobilizer function is completed (S29), the connection between the test terminal 16 and the failure diagnostic device is thereafter released. When the test terminal 16 is turned off (S30), the failure diagnosis mode ends.
[0038]
As described above, the smart entry ECU 3 shifts to the failure diagnosis mode on condition that the auxiliary switch 15 is turned on three times within a predetermined time (for example, 10 seconds) after the test terminal 16 is turned on. Even if the test terminal 16 is short-circuited and grounded (GND) in a circuit due to a trouble in the wiring of the system, it is possible to prevent the mode from being shifted to the failure diagnosis mode without permission.
[0039]
Therefore, according to the above-described embodiment, even if the test terminal 16 is short-circuited due to a trouble in the wiring of the system, it is possible to prevent the self-shift to the failure diagnosis mode and always operate the system normally. it can.
[0040]
In addition, when the diagnosis of the door lock / unlock function is started and the diagnosis is completed, the reversing operation of the door lock / unlock is repeated twice, so that the timing of the diagnosis start and the diagnosis end can be easily grasped. In particular, it is not possible to know when to turn on the IG switch to start the diagnosis of the immobilizer function without knowing the timing of ending the diagnosis. It is possible to prevent a prolonged period.
[0041]
In the above embodiment, not only the main key 11 but also the case where the IG switch can be rotated by turning the ignition knob without inserting the main key 11 and pushing it slightly while pressing it is described. It is not always necessary to provide such an ignition knob. Even when the IG switch can be rotated only by the main key 11, the present invention is of course applicable.
[0042]
Further, in the above-described embodiment, the case where the auxiliary switch 15 is turned on three times has been described as a condition for shifting to the failure diagnosis mode. However, the number of times the auxiliary switch 15 is turned on is not limited to three times but may be two times or It may be four or more times.
[0043]
Further, in the above-described embodiment, when the diagnosis of the door lock / unlock function is started and ended in the failure diagnosis mode, the door is locked / unlocked twice to notify the start and end of the diagnosis. It is not always necessary to perform such notification.
[0044]
Further, the present invention is not limited to the above-described embodiment, and various changes other than those described above can be made without departing from the gist of the present invention.
[0045]
【The invention's effect】
As described above, according to the first aspect of the present invention, even if the test terminal is short-circuited and grounded in a circuit (GND) due to a trouble in the wiring of the system, a failure occurs arbitrarily. The transition to the diagnosis mode can be prevented, the system can be operated normally, and highly reliable failure diagnosis can be performed efficiently.
[0046]
According to the second aspect of the present invention, the timing of starting and ending the diagnosis can be easily grasped from the repeated operation of locking / unlocking the door when the door lock / unlock function is diagnosed.
[Brief description of the drawings]
FIG. 1 is a block diagram of one embodiment of the present invention.
FIG. 2 is an operation explanatory diagram of one embodiment of the present invention.
FIG. 3 is a flowchart for explaining the operation of the embodiment of the present invention;
FIG. 4 is a flowchart for explaining the operation of the conventional example.
[Explanation of symbols]
1 electronic card key (portable device)
3 Smart entry ECU (control unit)
5. Door lock ECU (door lock drive unit)
6. Door lock motor (door lock drive unit)
11 Main key 15 Auxiliary switch 16 Test terminal

Claims (2)

The approach / separation of the portable device to the vehicle recognized by the control unit, together with controlling the door lock drive unit comprises a row cormorants door lock / unlock function unlocking / locking of the door by the control unit, the key cylinder The control unit receives an identification code signal transmitted from the portable device, or a main key that is removably inserted into a key cylinder of the ignition switch in a vehicle interior having an ignition switch provided, and receives the code content and In a vehicle smart entry system having an immobilization function for collating the code content registered in advance and if the two match, the ignition switch can be rotated.
A test terminal connected to an internal circuit of the failure diagnosis device is provided in the control unit,
An auxiliary switch that is turned on when the key cylinder is pushed in is provided to the ignition switch,
The test terminal is grounded when connected to an internal circuit of the failure diagnosis device,
The control section shifts to a failure diagnosis mode on condition that the test terminal is grounded and the auxiliary switch is turned on a plurality of times within a predetermined time from the grounding. system. When the mode shifts to the failure diagnosis mode, the door lock / unlock function starts to be diagnosed while the ignition switch is in an off state, and when the ignition switch is rotated by an operator to turn on the ignition switch, Configured to start diagnosis of the immobilization function,
The control unit controls the door lock drive unit to notify the start and the end of the diagnosis by repeating the lock / unlock of the door a plurality of times at the start and the end of the diagnosis of the door lock / unlock function in the failure diagnosis mode. The vehicle smart entry system according to claim 1, wherein the system is controlled.

Images