JPH11141210A - Door lock release system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a special behavior of an automobile and release a door lock automatically. SOLUTION: When an inclination angle detected by an inclination detection means 10 exceeds a predetermined inclination angle or it is judged that a ratio of the number of rotation of an engine to the number of rotation of wheels is out of a scope of a predetermined ratio based on signals from an engine number of rotation detection means 11 and a wheel speed detection means 12, a drive part 15 is operated and a door lock is automatically released based on the judgement signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an automobile door unlocking system.

[0002]

2. Description of the Related Art In the field of recent automobiles, with the spread of various systems such as a centralized door lock, a vehicle speed sensitive door lock, and a keyless entry system, an electromagnetic locking device that operates based on electric control is rapidly increasing. Spreading. This electromagnetic locking device generally uses a solenoid for locking and unlocking based on a signal given from a push-button switch provided in an operation panel, a vehicle speed detection signal, or a wireless signal from a portable keyless operation card. The power is supplied to the door and the mechanical part is operated to unlock the door. By using this electromagnetic locking device, for example, theft when leaving the vehicle or intrusion from outside can be ensured. Accidents, such as accidentally opening the door due to child's mistaken operation while the vehicle is running, and unlocking the door with a very simple switch operation when getting on or off the vehicle be able to.

[0003]

By the way, there is a case where some kind of accident, for example, derailing or slipping of wheels occurs during traveling of the vehicle and it is necessary to get off quickly. In such a case, for example, the electric control system of the vehicle may be destroyed or various electric circuits may be short-circuited due to flooding, but in this case, the electric control of the locking device may not function. There is a possibility that the door cannot be unlocked even if the door is unlocked.

In such a case, the occupant may have to be rescued from the outside of the vehicle. However, even in such a situation, the occupant is rescued to the outside of the vehicle if the door remains locked. It becomes difficult. Therefore,
An object of the present invention is to provide a door unlocking system that automatically unlocks a door when a special behavior of an automobile that may cause an accident can be performed to easily get off or rescue the vehicle. Is to do.

[0005]

Means for Solving the Problems In order to solve the above problems,
The invention according to claim 1 is a door unlocking system for automatically unlocking a door in a motor vehicle, wherein a drive unit for locking and unlocking the door and a tilt angle with respect to a horizontal posture of the motor vehicle are detected. Tilt detection means, and a door lock control means for controlling the drive unit based on the detection result of the tilt detection means, wherein the door lock control means adjusts the tilt angle detected by the tilt detection means. Determining means for determining whether or not the tilt angle is equal to or greater than a predetermined tilt angle, and unlocking the door if the tilt angle is equal to or greater than the predetermined tilt angle based on the determination result of the determining means. Drive control means for controlling the drive unit as described above.

According to a second aspect of the present invention, there is provided a door unlocking system for automatically unlocking a door in an automobile, wherein a drive unit for locking and unlocking the door and a rotation speed of an engine are detected. Engine speed detecting means for
A wheel speed detection unit for detecting a rotation speed of a wheel; and a door lock control unit for controlling the drive unit based on signals from the engine speed detection unit and the wheel speed detection unit, wherein the door lock control unit Determines whether or not the ratio of the engine speed detected by the engine speed detecting means to the wheel speed detected by the wheel speed detecting means is outside a predetermined ratio range during normal running. A determination unit; and a drive control unit that controls the drive unit to unlock the door when the ratio is outside the predetermined ratio range based on a determination result of the determination unit.

According to a third aspect of the present invention, there is provided a door unlocking system for automatically unlocking a door in a motor vehicle, wherein a drive unit for locking and unlocking the door is provided, and the vehicle is inclined with respect to a horizontal attitude of the motor vehicle. Inclination detecting means for detecting an angle, engine rotational speed detecting means for detecting the rotational speed of the engine, wheel speed detecting means for detecting the rotational speed of the wheel, the tilt detecting means, the engine rotational speed detecting means, and the wheel Door lock control means for controlling the drive unit based on a signal from the speed detection means. The door lock control means determines the inclination angle based on the inclination angle detected by the inclination detection means. It is determined whether or not the inclination angle is equal to or more than the inclination angle of the engine rotation speed, and the difference between the engine rotation speed detected by the engine rotation speed detection unit and the rotation speed of the wheel detected by the wheel speed detection unit. Is a predetermined inclination angle based on a result of the judgment by the judging means for judging whether or not the ratio is outside a predetermined ratio range during normal traveling, or is outside the predetermined ratio range. In this case, a drive control means for controlling the drive unit so as to unlock the door is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The door unlocking system according to the present invention has a special behavior in which there is a possibility that an accident has occurred in a vehicle, that is, the vehicle body of the vehicle is tilted at a predetermined tilt angle or more. (First condition), two behavior conditions such as the ratio of the engine speed to the speed of the wheels (follower wheels) greatly deviating from a predetermined ratio range seen during normal running (second condition). Is detected, and the first
And when at least one of the second condition is satisfied, the door lock is automatically released.

FIG. 1 is a block diagram showing a door unlocking system according to an embodiment of the present invention. The door lock release system is provided at a predetermined position on a vehicle body and detects a tilt angle of the vehicle with respect to a horizontal posture. Engine speed detecting means 11 (engine tachometer) for detecting vehicle speed, wheel speed detecting means 12 (wheel speed sensor) for detecting the respective speeds of the four wheels of the automobile, these inclination detecting means 10, engine speed detecting A door lock control unit 13 (door lock control unit) for controlling a door lock based on output signals of the unit 11 and the wheel speed detection unit 12 and a drive unit 15 for locking and unlocking the door are provided.

The inclination detecting means 10 is used to measure the behavior of the vehicle due to steering, the nose dive angle during braking, the movement performance such as the body posture when traveling on a rough road, and the measurement of the change in gradient during a climbing test. The existing gyro sensor used is directly used.

As the engine speed detecting means 11, an existing one which receives a pulse signal from an ignition coil for data detection such as a tachometer is used as it is.

The wheel speed detecting means 12 is an existing one that detects the rotational speeds of a driving wheel that rotates with the rotation of the engine and a driven wheel that performs a passive rotation. However, for convenience, FIG. 1 typically shows only one of the four wheel speed detecting means 12.

The door lock control unit 13 includes a CPU, an RO,
A general microcomputer chip having M, RAM, etc. is used, and all the arithmetic operations
And the like, which is executed by software stored in the storage device and the like, and determines the behavior state of the vehicle according to the first and second conditions, and the determination unit 13a
And a drive control means 13b for controlling the drive unit 15 so as to unlock the door when at least one of the first and second conditions is satisfied based on the determination result in.

The judging means 13a includes the inclination detecting means 10,
The engine speed detecting means 11 and the wheel speed detecting means 12 are connected by respective wirings, and the inclination angle detected by the inclination detecting means 10 is equal to or greater than a predetermined inclination angle with respect to the horizontal attitude (first condition). And that the ratio between the engine speed in the engine speed detection means 11 and the rotation speed of the driven wheels in the wheel speed detection means 12 is set outside the predetermined ratio range ( A second condition), a function of determining a rotational speed ratio, a function of determining a logical sum of these determinations, and a signal output function of transmitting an output signal to the drive unit 15 based on the determination of the logical sum. It is a thing that was given.

Here, the criterion for the inclination angle judging function and the rotational speed ratio judging function in the judging means 13a will be described in detail.

First, the tilt angle determining function will be described. On a bumpy road surface on a general road, during normal driving, a relatively slight inclination occurs in the vertical, front and rear, and left and right directions, so that the inclination angle θ with respect to the origin angle 0 °, which is the horizontal posture of the vehicle, The permissible range recognized during traveling is defined as a predetermined inclination angle range (-θs
To + θs). On the other hand, in a case where there is a possibility that some kind of accident has occurred in the vehicle, that is, for example, when the vehicle gets on or off a wheel due to a step (special behavior), the vehicle is in the above-described inclination angle range (−). (θs to + θs).

Therefore, when the inclination angle θ is smaller than the predetermined inclination angle (| θ | <| θs |), it can be determined that the vehicle is in a normal traveling state within the allowable range, and
The door lock state is maintained continuously. When the inclination angle θ is equal to or larger than the predetermined inclination angle (│θ│ ≧ │θs│), it can be determined that the vehicle is performing the special behavior as described above (e.g., getting on and off the wheel). .

As described above, in the inclination angle judging function of the judging means 13a, it is judged whether or not the vehicle is at a predetermined inclination angle θs or more as the above-mentioned first condition, and the first condition is satisfied. In this case, while outputting a signal indicating that an unlock instruction is given to the drive unit 15, if it is determined that the first condition is not satisfied, no instruction is given to the drive unit 15, and the door lock state is output. To maintain.

Next, the function of determining the rotational speed ratio will be described. Generally, the engine speed detecting means 11 and the drive wheels are connected to each other by a gear, and the engine speed N and the speed M1 of the drive wheels rotating with the rotation of the engine are in a fixed ratio (gear ratio) α. (Α = N / M1; α = const.).

Further, in a normal running state, since the vehicle weight acts as a mechanical load on both the wheels (the driving wheels and the driven wheels), the rotation speed M1 of the driving wheels and the rotation speed M2 of the driven wheels are slightly different. Aside from the slip, there is a substantially equal relationship (M1 ≒ M2), and thus a constant correlation between the engine speed N and the speed M2 of the driven wheels is established (α ≒ N / M2). Here, if the ratio (N / M2) between the engine speed N and the driven wheel speed M2 is represented by β,
In a normal traveling state in a predetermined ratio range in advance, β ≒
becomes α. However, this is achieved on the assumption that the vehicle is running in a normal state.
Here, considering the range of β allowed as the normal running state as a predetermined ratio range based on α, α1 to α2
(Α1 <β <α2). On the other hand, in a special behavior state in which there is a possibility of an accident in a car, for example, in the case of derailing or stopping running in mud, etc., even though the engine is running and the drive wheel is rotating, In some cases, the driven wheel may decelerate or stop. In addition, when the vehicle gets on or the like, a situation may occur in which the driven wheel idles while the rotation of the engine is stopped. In these cases, the balance between the rotational speeds of the drive wheel M1 and the driven wheel M2 is greatly disrupted (M1 ≠ M2). That is, the ratio β between the engine rotation speed N and the rotation speed M2 of the driven wheel falls outside the above-mentioned predetermined ratio range (second condition: α1> β or α2 <β).

Therefore, the ratio β between the engine speed N and the speed M2 of the driven wheels is within a predetermined ratio range (α1 <β <α).
When it is within 2), the door lock state is continuously maintained. As described above, when the ratio β between the engine speed N and the driven wheel speed M2 is out of the predetermined ratio range (when the second condition is satisfied), there is a high possibility of an accident (α1
> Β or α2 <β), and outputs a signal to give an unlock instruction to the drive unit 15. On the other hand, if the second condition is not satisfied, the locked state of the door is maintained without giving an instruction to the driving unit 15.

Incidentally, in this rotation speed ratio judging function,
Since the wheel speed detecting means 12 is installed on all the wheels of the automobile, the above β is actually derived for each of a plurality of driven wheels. If a special behavior is determined for one wheel, a signal to give an unlock instruction to the drive unit 15 is output at that time.

The drive section 15 receives a control signal from the drive control means 13b, and drives the door 15 to switch between locking and unlocking of the door, and to lock the door based on the drive signal from the drive circuit 15a. (Lock mechanism) ON / OF
And a solenoid 15b serving as an actuator for setting F. When the door is locked, power is supplied to the solenoid 15b to disengage and lock / unlock the door lock mechanism (striker) attached to the door body and the catch mechanism of the door lock.

The inclination detecting means 10 and the wheel speed detecting means 12 are, for example, ABS (Antilock).
For example, it is possible to use a component that has been mounted in advance for a break system or the like as it is, and to use an existing component provided with the engine rotation speed detecting means 11 as it is, so that a new component in the embodiment can be used. An increase in points can be prevented as much as possible.

The operation of the door lock release system having the above configuration will be described with reference to the flowchart of FIG. First, a driver or the like gets into an automobile, inserts an ignition key into an ignition cylinder, switches a key position from an off mode to a start mode via an accessory mode and an on mode, and starts driving the automobile. Here, the door is locked by, for example, activating a vehicle speed sensitive door lock function (not shown) that automatically locks the door simultaneously with traveling of the automobile (step S1). At the same time, the judgment means 13a of the door lock control means 13 in the door lock release system operates. That is, the door lock control means 13 determines that the inclination angle of the vehicle has become equal to or greater than the predetermined inclination angle (first condition) at every predetermined minute time (clock time) and that the engine rotation speed and the wheel rotation speed are different. It is determined whether or not two conditions of the ratio being out of the predetermined ratio range (second condition) are satisfied.

That is, in step S2, first, the first condition is determined. Here, the inclination angle θ with respect to the origin angle (0 °), which is a horizontal state of the vehicle, is equal to or greater than a predetermined inclination angle (│θ│ ≧ │θs│). If the determination is made based on the gradient pulse signal, the process proceeds to step S4 described below.

On the other hand, if it is determined that the first condition is not satisfied, the process proceeds to step S3. This step S3
Then, the above-described second condition is determined. That is, the ratio β between the engine rotation speed N and the rotation speed M2 of the driven wheel due to de-wheeling, slipping, etc., is β <α1 or β> α2
Is detected and determined, the process proceeds to step S4 described below.
Proceed to.

On the other hand, if β is within the predetermined ratio range (α1 <β <α2) in step S3, it means that both the first and second conditions are not satisfied, so that it is determined that the vehicle is in the normal traveling state. Yes, there is no need to unlock the door. Therefore, no instruction is given to the drive unit 15, the locked state of the door is maintained, and the determination process from step S2 is repeated.

Next, in step S4, an instruction signal is immediately sent from the door lock control means 13 to the drive unit 15, and based on the instruction signal, the drive unit 15 controls the drive of the door lock mechanism and the catch mechanism. Release. That is, the door lock is released (step S5). That is,
In this case, a special behavior such as derailing or wheel slippage has occurred, so that the door is forcibly unlocked immediately.

As described above, as a result of an accident or the like,
The door lock can be automatically released in a situation in which the driver has to quickly get off or rescue the occupant, so that the getting off or rescue operation can be easily performed. In particular, after the occurrence of an accident, it is conceivable that the electric circuit system may be damaged due to flooding or the like with the passage of time, and the desired circuit function may not work. By automatically unlocking, unlocking can be completed before the circuit function stops working, and the subsequent getting off or rescue operation becomes possible.

In the above embodiment, the first condition (the inclination angle of the vehicle with respect to the horizontal attitude is equal to or more than a predetermined inclination angle) and the second condition (the relationship between the engine speed and the wheel speed) are described. The ratio is out of the specified ratio range)
Has been described, and an example in which a door release system that locks and unlocks a door is applied based on the determination has been described. However, the present invention is not limited to this. For example, only the first condition is determined. It may be unlocked, or, conversely, unlocked by judging only the second condition.

Further, the present invention can be implemented only by adding wires for electrically connecting existing devices (inclination sensors, engine tachometers and wheel speed sensors) to the door lock control unit and by adding software for the door lock control circuit unit. Therefore, cost can be reduced.

[0033]

According to the first and third aspects of the present invention,
The inclination detecting means detects an inclination angle of the vehicle, and the door lock control means judges whether or not the inclination angle is equal to or more than a predetermined inclination angle based on the inclination angle detected by the inclination detection means, or According to the invention described in the items 2 and 3, when the engine speed detecting means detects the engine speed and the wheel speed detecting means detects the wheel speed, the engine speed is determined based on these signals. It is determined whether or not the ratio between the engine speed detected by the number detecting means and the wheel speed detected by the wheel speed detecting means is out of a predetermined ratio range during normal traveling. Based on these judgment signals, if the inclination angle is equal to or larger than a predetermined inclination angle or is outside a predetermined ratio range, the drive unit is set to operate and unlock the door. These special of vehicles It is possible to easily unlock the door lock on the motion. Therefore, when a special behavior is caused due to an accident or the like, there is an effect that the driver or the like can easily get off or rescue the driver.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a door lock release system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the door lock release system according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Inclination detection means 11 Engine speed detection means 12 Wheel speed detection means 13 Door lock control means 13a Judgment means 13b Drive control means 15 Drive unit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yozo Nishiura 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Research Institute, Inc.

Claims (3)

[Claims] 1. A door unlocking system for automatically unlocking a door in an automobile, comprising: a drive unit for locking and unlocking the door; and an inclination detecting means for detecting an inclination angle of the automobile with respect to a horizontal posture. And a door lock control unit that controls the drive unit based on a detection result of the tilt detection unit, wherein the door lock control unit determines the tilt based on the tilt angle detected by the tilt detection unit. Judging means for judging whether or not the angle is equal to or greater than a predetermined angle of inclination; and, when the angle of inclination is equal to or more than the predetermined angle of inclination, based on the judgment result of the judgment means, the door is unlocked. And a drive control means for controlling the unit. 2. A door unlocking system for automatically unlocking a door in an automobile, comprising: a drive unit for locking and unlocking the door; and an engine speed detecting means for detecting an engine speed. A wheel speed detecting means for detecting the number of rotations of the wheel; and a door lock control means for controlling the drive unit based on signals from the engine speed detecting means and the wheel speed detecting means. The means determines whether or not the ratio between the engine speed detected by the engine speed detecting means and the wheel speed detected by the wheel speed detecting means is outside a predetermined ratio range during normal running. And a drive control unit that controls the drive unit to unlock the door when the ratio is outside the predetermined ratio range based on a result of the determination by the determination unit. Door unlocking system that butterflies. 3. A door unlocking system for automatically unlocking a door in an automobile, comprising: a drive unit for locking and unlocking the door; and an inclination detecting means for detecting an inclination angle of the automobile with respect to a horizontal posture. An engine speed detecting means for detecting an engine speed, a wheel speed detecting means for detecting a wheel speed, signals from the inclination detecting means, the engine speed detecting means, and the wheel speed detecting means. And a door lock control unit that controls the drive unit based on the tilt angle, based on the tilt angle detected by the tilt detection unit, whether the tilt angle is equal to or greater than a predetermined tilt angle. And whether the ratio between the engine speed detected by the engine speed detecting means and the wheel speed detected by the wheel speed detecting means is the same as that in normal running. Determining means for determining whether or not the ratio is out of the range; and, if the angle is equal to or greater than the predetermined inclination angle based on the determination result of the determining means, or if the angle is out of the predetermined ratio range, the door is closed. And a drive control means for controlling the drive unit to unlock the door.