JP2016069929A - Door lock control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door lock control device for a vehicle that can precisely perform unlock control over a vehicle door in a locked state with inexpensive constitution.SOLUTION: A door lock control device 2 for a vehicle 1 comprises: an internal G sensor 8 which detects a collision of the vehicle 1; a collision determination part 7 which determines a collision when magnitude of a collision detected by the internal G sensor exceeds a predetermined threshold; a wheel speed sensor 6 which detects a moving state of the vehicle 1; an EFIECU 5 which detects an engine rotating speed indicative of a driving state of a driving source; and a body ECU 4 which unlocks locked doors of the vehicle 1 based upon a result of a determination on a collision by the collision determination part 7 and detection results of the vehicle speed sensor 6 and the EFIECU 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle door lock control device that performs unlock control on a vehicle door in a locked state when the host vehicle collides.

  2. Description of the Related Art Conventionally, a vehicle door lock control device that automatically controls a locked vehicle door to an unlocked (released) state when a predetermined condition is satisfied is known in preparation for an automobile collision accident. For example, in the vehicle door lock control device described in Patent Document 1, a collision of a vehicle is detected by an impact sensor, and an airbag module is activated based on the collision detection. The vehicle door is controlled to be unlocked. Specifically, the microcomputer recognizes the collision of the vehicle based on a signal from the airbag module. Based on the recognition result, the microcomputer unlocks the vehicle door by drivingly controlling a door lock motor for opening and closing the vehicle door after a predetermined reference time has elapsed since the vehicle collision. With this configuration, for example, when a vehicle encounters a collision accident and an occupant is left behind, the rescue operation can be performed smoothly.

Japanese Patent Laying-Open No. 2005-232854 (see paragraph 0021, FIG. 2, etc.)

  However, the conventional vehicle door lock control device is premised on having an airbag, and for example, how to cope with a vehicle not equipped with a side airbag becomes a problem. In addition, this type of apparatus is also required to have an operation accuracy so that the vehicle door is not accidentally controlled during traveling of the vehicle. Therefore, it is conceivable to separately provide a large number of impact sensors for lock / unlock control of the vehicle door, but there is a problem that the cost increases.

  The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle door lock control device that can accurately perform unlock control of a locked vehicle door with an inexpensive configuration.

  In order to achieve the above object, a vehicle door lock control device according to the present invention includes a collision detection unit that detects a collision of a vehicle, and the magnitude of the collision detected by the collision detection unit exceeds a predetermined threshold. A collision determination unit that determines that the vehicle has collided, a movement state detection unit that detects a movement state of the vehicle, a drive source state detection unit that detects a drive state of a drive source, and a collision by the collision determination unit And a door lock control means for unlocking the locked door of the vehicle based on the determination result and the detection results of the movement state detection means and the drive source state detection means. Item 1).

  Further, the moving state detection means is vehicle speed acquisition means for acquiring the vehicle speed of the vehicle from the rotational speed of wheels, and the door lock control means is detected by the vehicle speed acquisition means that there is a vehicle speed, and When the stop state of the drive source is detected by the drive source state detecting means, the door of the vehicle may be unlocked (Claim 2).

  According to the first aspect of the present invention, the door lock control means is locked based on the determination result of the collision determination means by the collision determination means and the detection results of the movement state detection means and the drive source state detection means. Unlock the vehicle door. According to this configuration, the door unlock control can be performed with higher accuracy than in the case of unlocking the vehicle door based only on the determination result that the collision determination unit has collided.

  In addition, as a method for accurately performing door unlock control, it is conceivable to provide a large number of collision detection means (for example, acceleration sensors), but the manufacturing cost of the vehicle door lock device increases. However, according to this configuration, in order to improve the accuracy of the door unlock control, for example, a vehicle speed sensor is used as the moving state detecting unit, and an ignition pulse sensor is used as the driving source state detecting unit. Existing facilities can be used. That is, it is possible to provide a vehicle door lock control device that can accurately perform unlock control of a locked door with an inexpensive configuration.

  According to the second aspect of the invention, the door lock control means detects the vehicle speed when the vehicle speed acquisition means detects that there is a vehicle speed and the drive source state detection means detects the stop state of the drive source. Unlock the door. According to this configuration, the door can be appropriately unlocked even in a state where the wheels are idle due to, for example, the vehicle rolling over.

It is a block diagram of the door lock control device for vehicles concerning one embodiment of the present invention. It is operation | movement explanatory drawing of the vehicle door lock control apparatus of FIG.

  A vehicle door lock control device 2 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of the vehicle door lock control device 2.

  In this embodiment, the vehicle door lock control device 2 disposed in the vehicle 1 includes an airbag ECU 3, a body ECU 4 and an EFIECU 5, and a wheel speed sensor 6 (the “movement state detecting means” of the present invention). And "corresponding to" vehicle speed acquisition means "), and it is determined whether or not the vehicle 1 has collided. When it is determined that the vehicle 1 has collided, the door of the locked vehicle 1 is automatically unlocked (released). To do.

  The airbag ECU 3 includes a collision determination unit 7 (corresponding to the “collision determination unit” of the present invention) that determines whether or not the vehicle 1 has collided, and an internal G sensor 8 (corresponding to “collision detection unit” of the present invention). With. Here, the internal G sensor 8 detects acceleration (including deceleration) of the vehicle 1 at a predetermined cycle, and is disposed in the center of the vehicle in this embodiment. The internal G sensor 8 is composed of a biaxial sensor, and is configured to detect a longitudinal acceleration, which is the vehicle traveling direction, and a lateral acceleration, which is the vehicle width direction. In this embodiment, the internal G sensor 8 is fixed to the base of the B pillar.

  The collision determination unit 7 determines whether or not the vehicle 1 has collided, and determines whether or not the vehicle 1 has collided based on information on the acceleration of the vehicle 1 from the internal G sensor 8. Specifically, the collision determination unit 7 acquires information on the acceleration / deceleration of the vehicle 1 from the internal G sensor 8, and the vehicle 1 collides when the acceleration (deceleration) value exceeds a predetermined threshold. It is determined that If the collision determination unit 7 determines that the vehicle 1 has collided, the collision determination unit 7 transmits a request signal to the body ECU 4 to unlock (release) the door of the vehicle 1.

  Further, in the airbag ECU 3, when the collision determination unit 7 determines that the vehicle 1 has collided, the airbag ECU 3 executes airbag deployment control. Specifically, in this embodiment, an airbag device (not shown) is provided corresponding to each of the driver seat and the passenger seat, and when the airbag ECU 3 determines that the vehicle 1 has collided, the airbag device In order to inflate and expand, energization of the inflator ignition device is started. By this energization, the filament in the ignition device is heated, thereby igniting the igniting agent. Thereafter, the flame propagates to the transfer agent and the gas generating agent in a very short time, and a large amount of nitrogen gas is generated from the gas generating agent. The nitrogen gas passes through the filter, is cooled and removed, and is supplied into the airbag 4. As a result, the airbag is inflated and deployed.

  The wheel speed sensor 6 is installed on each wheel of the four wheels provided in the vehicle 1 and detects the moving state of the vehicle 1 such as the vehicle speed by detecting the rotational speed of each wheel. To do.

  The EFIECU 5 calculates a required torque based on an accelerator opening detected by an accelerator sensor (not shown), and controls the fuel injection amount, intake air amount, ignition timing, and the like of the engine in order to output the required torque. In addition, the EFIECU 5 acquires the engine speed (E / G engine speed) at a predetermined cycle from, for example, an ignition pulse sensor or the like when controlling the fuel ejection amount.

  The body ECU 4 has a function of determining whether or not the door of the vehicle 1 is locked, determining whether or not to unlock (unlock) the door, and controlling the lock / unlock of the door. In this embodiment, the body ECU 4 automatically controls the door lock of the vehicle 1 when the vehicle 1 starts to move and exceeds a predetermined vehicle speed (for example, 15 km / h).

  By the way, when the vehicle 1 collides, it is preferable to automatically release the locked door so as not to hinder the occupant's rescue operation. However, if the door unlock control is performed only by the determination result (collision determination) of the airbag ECU 3, the door may be unlocked during traveling of the vehicle due to noise or failure of the internal sensor 8. Therefore, in this embodiment, in order to perform door unlock control with high accuracy, the body ECU 4 determines that the vehicle ECU 1 has collided with the airbag ECU 3 (receives the request signal) and the wheel speed sensor 6. The lock is released based on the acquired information on the moving state of the vehicle 1 (wheel speed in this embodiment) and the information on the state of the driving source of the vehicle 1 (in this embodiment, the engine speed) acquired from the EFIECU 5. It is configured to determine whether or not to do so.

  Specifically, when the body ECU 4 receives a request signal to unlock (release) the door of the vehicle 1 from the airbag ECU 3, whether or not the vehicle speed is “0” based on information from the wheel speed sensor 6. And whether or not the engine speed is “0” is determined based on information from the EFIECU 5. When the vehicle speed acquired from the wheel speed sensor 6 and the engine speed acquired from the EFIECU 5 are both “0” (the vehicle 1 is in a stopped state and the engine is in a stopped driving state), the vehicle speed is “0” and the engine speed is increased. Is not “0”, the body ECU 4 determines that the door of the vehicle 1 should be unlocked in any case where the vehicle speed is not “0” and the engine speed is “0”.

  Then, when it is determined that the door should be unlocked, the unlocking (unlocking) mechanism is activated after a predetermined time has elapsed after receiving the request signal (in this embodiment, after 10 seconds) Release the lock. On the other hand, even when the body ECU 4 receives the request signal, if the vehicle speed acquired from the wheel speed sensor 6 and the engine speed acquired from the EFI ECU 5 are not “0”, the body ECU 4 unlocks the door of the vehicle 1. Do not control.

For example, when the vehicle speed and the engine speed are both “0”, there is a high probability that the vehicle 1 is stopped. Further, when both the vehicle speed and the engine speed are not “0”, there is a high probability that the vehicle 1 is moving (running). When the vehicle speed is not “0” and the engine speed is “0”, it is assumed that the vehicle 1 rolls over and the wheels are idling. That is, in this embodiment,
Even if the collision determination unit 7 makes an erroneous determination, the vehicle 1 rolls over while preventing the unlock control from being performed while the door 1 is in danger of being unlocked as the vehicle 1 is traveling. When release is necessary, the door can be appropriately unlocked.

  Note that unlocking after a predetermined period of time prevents the door unlocking timing from overlapping with the momentary drop of the power supply voltage due to the impact or the timing at which an instantaneous interruption occurs. This is to prevent the occupant from moving and the unlocked door from being locked again. Note that the body ECU 4 unlocks and controls the door of the locked vehicle 1 based on the request signal, information on the vehicle speed acquired from the wheel speed sensor 6 and information on the engine speed acquired from the EFIECU 5. Corresponds to the “door lock control means” of the present invention.

  Next, operation | movement of the vehicle door lock control apparatus 2 is demonstrated with reference to the flowchart which shows the door unlock control process of FIG.

  First, the collision determination unit 7 acquires the acceleration of the vehicle 1 detected by the internal G sensor 8 at a predetermined period (step S1), and determines whether or not the detection value of the internal G sensor 8 exceeds a predetermined threshold. (Step S2). When the collision determination unit 7 determines that the detection value of the internal G sensor 8 does not exceed the predetermined threshold value (NO in step S2), the process of step S1 is repeated until the predetermined threshold value is exceeded. .

  When the collision determination unit 7 determines that the detection value of the internal G sensor 8 exceeds a predetermined threshold (YES in step S2), the collision determination unit 7 outputs a request signal for unlocking (releasing) the door of the vehicle 1 to the body. It transmits to ECU4.

  The body ECU 4 that has received the request signal acquires information on the vehicle speed from the wheel speed sensor 6 and determines whether or not the vehicle speed is “0” (step S3). If the vehicle speed is not “0” (NO in step S3), it is determined whether or not the engine speed (E / G speed) acquired from the EFIECU 5 is “0” (step S6). If the engine speed is not “0” (NO in step S6), the process ends.

  When the vehicle speed is “0” (YES in step S3) or the engine speed is “0” (YES in step S6), the body ECU 4 determines whether the door of the vehicle 1 is locked. It is determined whether or not (step S4). Here, when the door is locked (in the case of YES in step S4), the body ECU 4 unlocks (locks) after a lapse of a predetermined time (in this embodiment, 10 seconds) after receiving the request signal. The release mechanism is activated to unlock the door (step S5). If the door is not locked (NO in step S4), the process ends.

  Therefore, according to the above-described embodiment, the body ECU 4 is locked based on the determination result that the collision determination unit 7 has collided, the vehicle speed acquired from the wheel speed sensor 6, and the engine speed acquired from the EFI ECU 5. Unlock the door of the vehicle 1 that is on the road. According to this configuration, the door unlock control can be performed with higher accuracy than in the case of unlocking the door of the vehicle 1 based only on the determination result that the collision determination unit 7 has collided.

  In addition, as a method for accurately performing door unlock control, it is conceivable to provide a large number of collision detection means (for example, acceleration sensors), but the manufacturing cost of the vehicle door lock device 2 increases. However, according to this configuration, since the wheel speed sensor 6 and the EFIECU 5 which are existing facilities of the vehicle 1 are used to accurately perform the unlock control of the door, the manufacturing cost of the vehicle door lock control device 2 can be reduced. Can be planned.

  In addition, the body ECU 4 unlocks the door of the vehicle 1 when the information acquired from the wheel speed sensor 6 is the vehicle speed “0” and the information acquired from the EFIECU 5 is the engine speed “0”. According to this configuration, the door can be appropriately unlocked even in a state where the wheels are idle due to, for example, the vehicle 1 rolling over.

  The present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the internal G sensor 8 is built in the airbag ECU 3 has been described. However, the G sensor 8 may be provided separately from the airbag ECU 3.

  In the above-described embodiment, the case where the wheel speed sensor 6 is used as the means for detecting the movement state of the vehicle 1 has been described. However, as another example, for example, a yaw rate sensor or a car navigation system is used. It may be detected whether or not the vehicle 1 is moving.

  Further, the drive source of the vehicle 1 is not limited to the engine, and may be a motor, for example.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Door lock control apparatus for vehicles 3 ... Airbag ECU
4 ... Body ECU (door lock control means)
5 ... EFIECU (drive source state detection means)
6 ... Wheel speed sensor (moving state detecting means, vehicle speed acquiring means)
7 ... Collision judging unit (collision judging means)
8 ... Internal G sensor (collision detection means)

Claims (2)

Collision detection means for detecting a vehicle collision;
A collision determination unit that determines that a collision has occurred when the size of the collision detected by the collision detection unit exceeds a predetermined threshold;
A moving state detecting means for detecting a moving state of the vehicle;
Drive source state detection means for detecting the drive state of the drive source;
Door lock control means for unlocking the locked door of the vehicle based on the determination result of the collision determination means by the collision determination means and the detection results of the movement state detection means and the drive source state detection means; A vehicle door lock control device comprising: The moving state detection means is vehicle speed acquisition means for acquiring the vehicle speed of the vehicle from the rotational speed of wheels,
The door lock control means unlocks the door of the vehicle when the vehicle speed acquisition means detects that there is a vehicle speed and the drive source state detection means detects a stop state of the drive source. The vehicle door lock control device according to claim 1.

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