KR20140011833A - Apparatus for protecting rear seat passenger and control method thereof - Google Patents

Abstract

The present invention relates to an apparatus for protecting a vehicle rear seat passenger and control method thereof. The purpose of the present invention is to provide an apparatus for protecting a rear seat passenger which can protect a rear seat passenger in various positions while maintaining a front/rear seat's convenient function (that is, a seat position adjustment function) when a front crash occurs. In order to achieve the purpose, the apparatus for protecting a rear seat passenger according to the present invention comprises: a front detection sensor for detecting preceding vehicle information while driving; a driving status detection unit for detecting driving status information of a user's vehicle; a passenger detection unit for detecting the presence of a rear seat passenger; a front crash sensor for detecting a front crash of a user's vehicle; a control unit for outputting a control signal to control front and rear seat positions and an air bag device operation for protecting a rear seat passenger when a front crash is expected or occurs based on signals of the front detection sensor, driving status detection unit, passenger detection unit, and front crash sensor; a seat device for adjusting front and rear seat positions according to control signals of the control unit; the air bag device for protecting a rear seat passenger which is installed in the front seat and is deployed towards a rear seat passenger according to control signals of the control unit. [Reference numerals] (110) Front detection sensor; (120) Driving status detection unit; (130) Passenger detection unit; (140) Front crash sensor; (150) Brake sensor; (160) Seat control unit; (170) Seat belt sensor; (200) Control unit; (210) Seat device; (220) Air bag device for protecting a rear seat passenger; (230) Warning device; (240) Seat belt device for a rear seat passenger (including a positioner); (250) Break device

Description

Apparatus for protecting rear seat passenger and control method

The present invention relates to a rear passenger protection device and a control method thereof, and more particularly, to a rear passenger protection device and a method of controlling the same, which can more safely protect the rear passenger when a front collision of the vehicle occurs.

With the increasing interest in passenger safety along with the functionality and convenience of today's cars, the importance of safety devices to protect passengers in the event of a vehicle accident is becoming increasingly important.

The most representative of the various safety devices mounted on a vehicle is a passenger restraint device such as an airbag device or a seatbelt device. This means that a passenger may be injured by restraining the passenger using an airbag or a seatbelt in the event of a frontal or side collision of the vehicle. prevent.

In recent years, pre-crash-safety (PCS: Pre-) measures the risk of collision with a preceding vehicle and warns the driver of the risk of collision according to the risk of collision or, if necessary, performs automatic braking before collision. Crash-Safety control technology has been developed.

This pre-crash-safety control includes the ability to roll up the seatbelt as much as possible prior to the crash to restrain the passenger, i.e. the Pre-safe Seat Belt (PSB) function.

The pre-safe seat belt (PSB) system is a system capable of winding or releasing the seat belt using a motor, in addition to the basic function of restraining passengers by winding the seat belt as much as possible by using a motor before a collision, It prevents the belt from sagging, vibrates the belt through the motor to warn of a dangerous situation, or winds the belt appropriately according to the driving situation to prevent the driver from front or side tilting and secures the driving stability.

In addition to the pre-safe seat belt function, a function is provided to safely restrain and protect the passenger by operating the pre-tensioner at the beginning of the collision and pulling the seat belt.

On the other hand, in the case of rear seats in the vehicle, the specifications of the safety device is poor compared to the front seats such as the driver's seat and the passenger seat, and related laws on the safety of the rear passengers are also insufficient.

In particular, when the rear passengers do not wear seat belts, there are no safety devices to protect the passengers, so the rear passengers collide directly with the front passengers or collide with the interior materials such as the seats and headrests of the roof or front seats. You can wear

Furthermore, in the case of luxury cars, the seat system is equipped with a seat system that can adjust the seat positions of the front and rear seats in various ways, but there is a lack of a method to safely protect the rear passengers in the case of frontal collision at various seat positions. .

Therefore, there is a need for a system capable of securing safety for rear passengers, and in particular, the protection space and posture of passengers vary depending on the seat position, and thus, the development of a protective device that can more safely protect the rear passengers is urgently needed.

Accordingly, the present invention has been made in consideration of the above-mentioned points, and the rear seats can more safely protect the rear passengers of various postures in the event of a frontal collision while maintaining the front / back seat convenience function (that is, the seat position adjustment function). The purpose is to provide a passenger protection device.

In order to achieve the above object, the present invention, a front sensor for detecting the preceding vehicle information while driving; A driving state detector for detecting driving state information of the own vehicle; Passenger detection unit for detecting the presence of passengers in the rear seats; A front collision sensor for detecting a front collision of the vehicle; Outputting a control signal for controlling the position of the front and rear seats and the operation of the rear passenger protective airbag device at the time of predicting and generating the front collision based on the signals of the front sensor, the driving state detector, the passenger detector, and the front collision sensor. Control unit; Seat apparatus for adjusting the position of the front seat and the rear seat according to the control signal of the control unit; It is installed on the seat of the front seat provides a rear passenger protection device for a vehicle comprising a; rear passenger airbag device for deploying operation toward the rear passenger according to the control signal of the control unit.

In a preferred embodiment, the control unit calculates the risk of collision with the preceding vehicle from the signal of the front sensor and the driving state detection unit in the state that the passenger seated in the rear seat, when the front collision is predicted from the calculated collision risk, the front seat and the rear seat And outputting a control signal for moving the position of the sheet to the set reference position.

The controller may operate the rear passenger protective airbag device when the front collision of the vehicle is detected through the front collision sensor while the front seats and the rear seats are moved to the reference position.

In addition, the rear passenger seat protection apparatus of the present invention, the seat passenger seat belt device having a pre-tensioner for performing the instant pull operation of the seat belt according to the control signal of the control unit; And a seat belt sensor for detecting seat belt wearing of the rear passengers, wherein the control unit detects seat seat wearing of the rear passengers through the seat belt sensor in front of the vehicle in a reference position movement state of the front and rear seats. The pretensioner is operated when a collision occurs.

And, the present invention, the step of detecting the passenger seated on the rear seat by the passenger detection unit; Receiving, by the control unit, preceding vehicle information detected through the front sensor during driving of the vehicle while the passenger of the rear seat is detected and driving state information of the own vehicle detected by the driving state detection unit; The control unit calculates the risk of collision with the preceding vehicle from the preceding vehicle information and the driving state information of the own vehicle, and when the forward collision is predicted from the calculated collision risk, a control signal for moving the positions of the front and rear seats to the set reference positions. Outputting; Moving, by the seat apparatus, the positions of the front seats and the rear seats to a reference position according to the control signal; And when the controller detects a front collision of the vehicle through the front collision sensor, operating the rear passenger protective airbag device.

Here, the control method of the present invention includes the steps of detecting the seat belt wearing state of the rear passenger by the seat belt sensor; And operating the pretensioner of the rear passenger seat belt device when the controller detects a front collision of the vehicle in a state where the seat belt wearing of the rear passenger is detected.

In a preferred embodiment, the control unit moves the position of the front and rear seats to the reference position at the time before the collision after the front collision prediction, and accelerates the threshold for determining whether and when the rear passenger protective airbag device is operated. The airbag deployment time according to the adjusted threshold value is set after the front collision by adjusting the value according to the size and the collision mode.

In addition, the control unit moves the positions of the front and rear seats to the reference position at the time before the collision after the front collision prediction, and adjusts the threshold values for determining whether the pretensioner is operated and the operation time to values according to the acceleration magnitude and the collision mode. Thus, the pretensioner operating time according to the adjusted threshold value is set after the front collision.

In addition, the position control of the front seat and the rear seat is characterized in that it comprises a front and rear sliding position control to the reference position and seat back angle control.

Accordingly, according to the rear passenger protection device of the present invention, when the front collision prediction when the front seats and the rear seats are moved to a preset reference position, the front collision is judged to operate the rear passenger protection airbag device and seat belt device It is configured so that the front / rear seat convenience function (that is, the seat position adjustment function) can be maintained more safely while the rear passenger is in front of the crash.

1 is a block diagram showing the configuration of a rear passenger protection device according to an embodiment of the present invention.
Figure 2 is an operating state diagram showing the main operating state of the rear passenger protection device according to an embodiment of the present invention.
Figure 3 is an operating state diagram showing the deployment operation state of the rear passenger protection airbag device in the rear passenger protection device according to an embodiment of the present invention.
Figure 4 is a perspective view illustrating the full shape of the airbag cushion applicable to the rear passenger protection device according to an embodiment of the present invention.
5 is a view showing the operation sequence according to the estimated collision time of the rear passenger protection device according to an embodiment of the present invention.
6A to 6C are flowcharts illustrating an overall control process of the rear passenger protection apparatus according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be easily understood by those skilled in the art.

The present invention relates to a rear passenger protection device that can protect a rear passenger as much as possible by operating an airbag device when it is impossible to avoid collision by determining a collision risk with a preceding vehicle.

1 is a block diagram showing the configuration of a rear passenger protective device according to an embodiment of the present invention, Figure 2 is an operating state diagram showing the main operating state of the rear passenger protective device according to an embodiment of the present invention.

As shown, the rear passenger protection device of the present invention, the front sensor 110 for detecting information of the preceding vehicle during driving; A driving state detection unit 120 for detecting driving state information of the own vehicle; Passenger detection unit 130 for detecting the presence of passengers in the rear seat; A front collision sensor 140 for detecting a front collision of the vehicle; Based on the signals of the front sensor 110, the driving state detection unit 120, the passenger detection unit 130, and the front collision sensor 140, the position of the front and rear seats and rear seat passenger protection airbag at the time of the front collision prediction and occurrence A controller 200 for outputting a control signal for controlling the operation of the apparatus 220; A seat device (210) for adjusting positions of the front seats and the rear seats according to the control signal of the control unit 200; It is installed on the seat of the front seat comprises a rear passenger airbag device 220 for operating the rear passenger toward the rear seat according to the control signal of the control unit 200.

Here, the front sensor 110 is a component for detecting the information of the preceding vehicle, that is, the distance and relative speed with the preceding vehicle while the vehicle is running, which is a radar installed in front of the vehicle (reference numeral in FIG. 2). 111) or a camera (112 in FIG. 2).

In general, vehicles equipped with ACC (Auto-Cruise Control, Adaptive-Cruise Control), SCC (Smart Cruise Control), or PCS (Pre-Crash-Safety) system are used to detect the distance and relative speed to the preceding vehicle. And a camera 112, and ECUs of these systems, for example, ACC ECUs and PCS ECUs, receive signals output from the radar 111 and the camera 112.

The control unit 200 of the present invention may be configured to directly receive a signal from the radar 111 or the camera 112, the configuration so that the control unit 200 receives the preceding vehicle information from the ACC ECU or PCS ECU It will also be understood to be included in the present invention.

The driving state detection unit 120 may be configured to include a plurality of sensors in the vehicle for detecting the vehicle speed, steering angle, yaw rate, lateral acceleration of the vehicle, these sensors are vehicle speed sensor (wheel speed sensor) ), A steering angle sensor, a yaw rate sensor, and an acceleration sensor (G sensor).

The control unit 200 of the present invention may be configured to directly receive the signals of the sensors, but in the vehicle to which the electronic stability control (ESC) is applied, the ESC ECU receives the signals of the vehicle sensors. In addition, it will be understood that the controller 200 receives the driving state information of the own vehicle from the ESC ECU.

The passenger detector 130 is a component for detecting whether the passenger is currently seated in the rear seat, and in the present invention, only when the controller 200 determines that the passenger is seated in the rear seat from the signal of the passenger detector 130. The rear passenger protective airbag device 220 is set to deploy and operate.

The passenger detection unit 130 is a rear seat seat sensor of the ODS (Occupant Detection System) is installed in the passenger seat seat to detect the adult and the child (1/3 / 6 years old, child seat) in order to satisfy the regulations It can be configured by installing in.

Such sensors are known as a pattern recognition method for distinguishing by using the buttocks pattern, a method for detecting the pressure according to the weight, a method for measuring the capacitance varies depending on the passenger, but in the present invention as a sensor of the passenger detector If it is possible to detect the presence or absence of passengers in the rear seats can be adopted without particular limitation.

The front collision sensor 140 may be a conventional front impact sensor (FIS) for determining whether to deploy an existing air bag such as a driver's seat and a passenger's seat airbag.

On the other hand, the control unit 200 determines the risk of collision between the host vehicle and the preceding vehicle based on the information detected by the front sensor 110 and the driving state detection unit 120, the front collision according to the determined risk of collision If the occurrence is predicted to operate the warning device 230 to warn the driver.

Here, the warning device 230 may be a warning light provided in the vehicle or a warning sound generating unit or a rear seat passenger seat belt device 240 for vibrating the seat belt through a motor.

As described above, the rear passenger seat protection device of the present invention may further include a rear passenger seat belt device 240 provided to be worn by the rear passenger of the vehicle, and the rear passenger seat belt device 240 may be external. It may be provided with a pretensioner that restrains a rear passenger through a pull operation that momentarily pulls the seat belt by an electrical signal.

The control unit 200 performs automatic braking of the vehicle through cooperative control with the brake control unit when collision avoidance is not possible due to the driver's intention in an impending collision risk situation or when the driver does not press the brake pedal.

For example, when it is determined that the driver does not step on the brake pedal from the signal of the brake sensor 150 for detecting the operation state of the brake pedal in a high risk of collision, the controller 200 outputs a control signal for automatic braking. Finally, the brake control unit receives the control signal to force the vehicle to brake by controlling the brake apparatus 250 of the vehicle (active brake control).

Here, the brake control unit may be an ESC ECU. Typically, the ESC ECU performs hydraulic control of the hydraulic brake device 250 while calculating and distributing the braking torque required for braking the vehicle when the driver presses the brake pedal. Solenoid valve control) to control the braking force of the vehicle.

In addition, when the driver presses the brake pedal in a collision risk situation, the ESC ECU increases the brake braking pressure step by step through cooperative control with the control unit 200 so that the vehicle can be stopped at the driver's will, thereby To avoid collisions.

That is, when the controller 200 receives the signal from the brake sensor 150 from the ESC ECU and recognizes that the driver has stepped on the brake pedal, the controller 200 outputs a signal according to the collision risk to the ESC ECU. According to the pre-fill stage to secure a predetermined initial hydraulic pressure → pre-brake stage to generate a weak braking force → brake assist stage to generate additional braking force Braking control is performed to increase the dynamic pressure so that the vehicle can stop within a short time, thereby preventing collision.

When the controller 200 determines that it is an urgent collision risk situation from the collision risk, the control unit 200 controls the operation of the seat belt device 240 so that the seat belt can be restrained stably by winding the seat belt as much as possible through the motor ( Passenger restraint through seat belt retraction).

In addition, in the present invention, when the control unit 200 predicts the occurrence of a collision and determines that the collision risk is a high level above a predetermined set value, the control unit 200 may include active brake control (forced braking force generation) and a seat belt for forcibly stopping the vehicle. In addition to the passenger restraint control, the positions of the front and rear seats are moved to a preset reference position.

In the present invention, the seat position control includes both the front and rear seat position control, and the seat back reclining control, and the control unit 200 receives the current position information of the front seat and the rear seat from the seat controller 160. If the position of each seat is not in the reference position, move to the reference position.

At this time, the control unit 200 outputs a control signal for moving the positions of the front seats and rear seats to the reference position, the seat control unit 160 is the position of the front seats and rear seats according to the control signal output from the control unit 200 A method of controlling the operation of the seat device 210 (seat sliding device and reclining device) may be adopted to move the to the reference position.

Here, the reason why the process of moving the position of the front seats and the rear seats in advance to the reference position before the collision is necessary, the proper expansion of the air bag for the safety and protection of the rear passengers during the operation of the rear passenger protective airbag device 220 after the collision and This is to protect the rear passengers more safely by ensuring that the airbags are deployed while securing the exact front and rear seat positions and the front and rear passenger seats while securing the deployment space.

For the convenience of passengers in general, the positions of the front and rear seats, ie the front and rear positions of the front seats (driver's or passenger seat, etc.) and the rear seats, and the angle of the seat back should be properly adjusted according to the passenger's will, but in the event of a collision, It is desirable to ensure that the position is fixed at the correct reference position.

If the seatback of the front seat or the seatback of the rear seat is excessively flipped forward or backward beyond the reference position, or the front or rear seat is excessively forward or backward positioned, the inflation position of the airbag during the airbag deployment operation As the car becomes too close or too far from the rear passenger, an unexpected passenger injury is caused by the airbag deployed in front of the rear passenger, or a situation in which the passenger cannot be properly protected by the airbag.

Therefore, in the present invention, in consideration of the position of the front seats and rear seats may be adjusted to a position that gives priority to the convenience of the passengers, the reference position by checking the positions of the front seats and the rear seats when a collision is predicted. The seat is normally placed in a position that prioritizes convenience, but is moved to an optimal position to protect the rear passengers when a collision is predicted.

In addition, the controller 200 satisfies the operating conditions of the pretensioner of the rear seat passenger seat belt device 240 and the rear passenger protection airbag device 220 when the front collision of the vehicle is determined from the signal of the front collision sensor 140. If it is determined whether all of the operating conditions are satisfied, the pretensioner and the rear passenger protective airbag device 220 are operated to safely restrain and protect the rear passenger.

At this time, the controller 200 predicts a collision and adjusts a threshold for determining whether the rear passenger's airbag device 220 and the pretensioner are operated at a predetermined time before the collision, and when the collision occurs. Will go through.

That is, the controller 200 adjusts the threshold value according to the collision mode such as the acceleration (collision speed) magnitude and the front / offset / tilt collision at the time point (applies a variable threshold value), and then determines the collision of the host vehicle. According to the threshold value, the airbag deployment time and the pretensioner time to fire (TTF) are set according to the acceleration magnitude and the collision mode, so that the rear passenger airbag device 220 and the pretensioner are defined in the TTF defined for the collision situation. To be deployed and operated accordingly.

As described above, the control unit 200 controls the winding operation of the seat belt by the motor, the pretensioner operation of the seat belt device 240, and the operation of the airbag device 220 for protecting the rear passengers. The vehicle may be an airbag control unit (ACU), which is a control element of the airbag device 220 and the seat belt device 240.

On the other hand, the rear seat passenger protection device according to the present invention includes a seat device 210 for adjusting the position of the front seat and the rear seat according to the control signal of the control unit 200, wherein the seat device 210 as described above And a front and rear sliding device for adjusting the front and rear positions of the rear seat, a reclining device for adjusting the seat back angles of the front and rear seats, and controlling the operation of the front and rear sliding devices and the reclining device according to control signals of the controller 200. It becomes the structure containing the sheet control part 160 which moves the position of a sheet to a reference position.

In addition, after the control unit 200 confirms that the rear seat passenger is boarding through the passenger detection unit 130, the seat belt device such as vibration and retraction operation of the seat belt through the motor, and pretensioner operation only when the rear seat passenger wears the seat belt. The control of the 240 is made, so that the rear passenger protection device of the present invention includes a seat belt sensor 170 for detecting the seat belt wearing of the rear passenger.

The seat belt sensor 170 may be a buckle sensor that is pre-mounted in a normal vehicle, and after the control unit 200 determines whether the seat passenger wears the seat belt from the signal of the buckle sensor, the seat passenger seats the seat belt. Seat belt control such as belt vibration, belt winding operation and pretensioner operation is performed only while worn.

In addition, the rear passenger protective device of the present invention includes a rear passenger protective airbag device 220, the airbag device 220 is installed in the seat back of the front seat is installed to be deployed rearward toward the rear passenger.

Referring to the rear passenger protective airbag device 220 in more detail with reference to the drawings, Figure 3 is an operational state diagram showing the deployment operation state of the rear passenger protective airbag device in the rear passenger protection device according to an embodiment of the present invention, 4 is a perspective view illustrating the full shape of the airbag cushion applicable to the rear seat passenger protection device according to an embodiment of the present invention.

Although the detailed configuration of the rear passenger airbag device in the present invention is not illustrated in the drawings, there is no difference in the basic configuration compared to a conventional vehicle airbag device, by injecting the gas generated by the inflator, the gas generated by the inflator And an airbag cushion mounted rearward toward the rear passenger to absorb shock, and an airbag housing mounted on the seatback frame of the front seat and accommodating the inflator and the airbag cushion.

In the rear passenger airbag device 220, the inflator operates according to the control signal of the controller 200 to generate gas, and the airbag cushion 221 is inflated by the injection of the generated gas to open the door at the rear of the seat back. It is then deployed to the rear, absorbing the shock of passengers in the rear seats.

As shown in FIG. 4, the airbag cushion 221 has a protrusion 222 at the top restraining a shoulder of a rear passenger, a split 223 at the top restraining a head of a rear passenger, and a center restraining a chest of a rear passenger. The chest restraint portion 224, the knee restraint portion 225 of the bottom restraints the knee of the rear passenger may be applied to have a full bloom shape formed integrally.

In addition, the rear seat passenger protection device of the present invention, after the control unit 200 confirms the operation state of the brake pedal, as described later, active brake control, movement of the reference position of the seat, seat belt winding operation, the threshold (airbag device for rear passenger protection) And a threshold value for the pretensioner of the seat belt device, and the like, and for this purpose, includes a brake sensor 150 for detecting an operating state of the brake pedal.

At this time, the control unit 200 may be configured to directly receive the signal of the brake sensor 150, it will be understood that the configuration to receive the brake pedal operation signal via the ESC ECU is also included in the present invention.

In this way, in the present invention, the control unit determines the collision risk based on the preceding vehicle information detected through the front sensor and the driving state information of the own vehicle detected by the driving state detection unit, the presence of passengers in the rear seat, seat belt wearing Whether the front seats and rear seats transmitted from the seat control unit, the brake pedal is activated, whether or not the collision occurs, the operation of the warning device, the operation of the breck device, the winding of the rear seat belt device for restraining the rear passengers Operation, movement of the reference position of the front and rear seats, and the operation of the pretensioner of the rear passenger protective airbag device and the rear seat belt device, which are the rear passenger restraint devices, are controlled.

Hereinafter, a specific example of the control process of the rear passenger protection device according to the present invention will be described with reference to FIGS. 5, 6A to 6C.

5 and 6a to 6c are views for explaining a control process for protecting a rear passenger according to the present invention, Figure 5 is a view showing the operation process according to the estimated collision time after the collision occurrence is predicted, 6a to 6c are flowcharts of the entire control process.

First, the control unit 200 determines whether the rear seat passenger and the rear seat passenger wear the seat belt through the passenger detection unit 130 and the seat belt sensor 170 (S11 and S12).

At this time, when it is determined that the passenger is not seated on the rear seat through the passenger detection unit 130, the rear passenger protection device of the present invention does not operate, in this case the passenger restraint device (airbag device and Only the seat belt device) (S11 ').

If the controller 200 determines that the passenger is seated in the rear seat from the signal of the passenger detector 130 and determines that the rear passenger is wearing the seat belt from the signal of the seat belt sensor 170, Operation of the rear passenger protective airbag apparatus 220 and the seat belt apparatus 240 is controlled as described below so that the rear passenger can be safely protected against a collision.

On the other hand, when the passenger is seated in the rear seat, but determines that the rear passenger does not wear the seat belt, only the rear passenger protective airbag device 220 is operated, and the seat belt device 240 is not operated.

In the following description of the control process of the present invention will be described on the assumption that the control unit determines that the passenger seated on the rear seat wearing the seat belt, if the rear seat passenger is not wearing the seat belt as described above, the seat belt The operation of the device, ie the vibration of the seat belt through the motor, the winding of the seat belt for the passenger restraint to maximize the seat belt, the operation of the pretensioner, etc. are not performed. It should be understood except for the case (except for the seat belt device, the seat belt is worn and not worn).

Next, the controller 200 receives the position information of the front seats and the rear seats from the seat control unit 160 while driving the vehicle in the seat passenger seating and seat belt wearing state (S13), and the signal of the driving state detection unit 120 and the front The collision risk is calculated from the signal of the sensor 110 to predict the collision with the preceding vehicle (S14 and S15).

In this case, the collision risk may be a time to collision (TTC), which means an estimated collision time, that is, a time remaining from the present to the collision with the preceding vehicle, and the controller 200 is detected by the driving state detector 120. The estimated time of collision with the preceding vehicle is calculated based on the driving state information of the own vehicle and the preceding vehicle information such as the distance and the relative speed of the preceding vehicle detected by the front sensor 110.

For reference, the smaller the collision prediction time (TTC) value is, the higher the risk of collision is (the situation where the collision is more likely), and the process of calculating the collision prediction time from the driving state information of the own vehicle and the preceding vehicle information is a known technique. Detailed description will be omitted.

Thereafter, when the controller 200 calculates the estimated collision time and determines that the estimated collision time is the first predetermined value, for example, when it is determined that the collision is 2.5 seconds to 3 seconds (S16), the driver is operated by operating the warning device 230. To warn the occurrence of a collision (warning light / warning sound generating unit operation or belt vibration) (S17), to ensure the initial hydraulic pressure of the brake device 250 by causing the brake control unit to perform the pre-fill control.

In addition, when the controller 200 determines that the driver presses the brake pedal through the brake sensor 150 when the estimated collision time is the second value, for example, 2.5 seconds (S18 and S19), the controller 200 pre-brake together with the brake controller. At the same time, it attempts to avoid collision by increasing the braking pressure stepwise by performing brake assist control.At this time, a winding operation that winds up the seat belt of the rear seat by controlling the motor drive so that the rear passengers can be stably restrained (the driver If stepped on automatically performs the winding operation of the PSB) (S20, S21).

If collision avoidance is not possible due to the driver's intention or the driver does not press the brake pedal, the controller 200 increases the braking pressure by performing pre-brake and brake assist control (S22), and the estimated collision time is the third. A value, for example, 1.0 seconds before the active brake control is performed to forcibly stop the vehicle (S23, S24).

At this time, the control unit 200 moves the seat position of the front seat and the rear seat to a predetermined reference position, and the forced winding operation (when the driver does not step on the brake pedal) of the PSB winding the seat belt of the rear seat, The process of adjusting the threshold value for determining whether to operate the airbag device 220 and the pretensioner is performed (S24).

Subsequently, when a front collision of the vehicle is detected through the front collision sensor 140 (S24), it is determined whether the pretensioner of the rear seat belt device 240 and the rear passenger protective airbag device 220 are operated (S26, S27). When all the operating conditions are satisfied, the pretensioner and the airbag device 220 are operated (S28).

Of course, if the front collision does not occur, the positions of the front seats and rear seats are restored to the original position from the reference position (S25 ').

In addition, when the rear passenger does not wear the seat belt in the above control process, as described above, the control for the seat belt winding operation and the pretensioner operation is not performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

110: front detection sensor 120: driving state detection unit
130: passenger detection unit 140: front collision sensor
150: brake sensor 160: seat control unit
170: seat belt sensor 200: control unit
210: seat device 220: rear passenger airbag device
230: warning device 240: rear seat seat belt device
250: brake unit

Claims (12)

A front sensor for detecting preceding vehicle information while driving;
A driving state detector for detecting driving state information of the own vehicle;
Passenger detection unit for detecting the presence of passengers in the rear seats;
A front collision sensor for detecting a front collision of the vehicle;
Outputting a control signal for controlling the position of the front and rear seats and the operation of the rear passenger protective airbag device at the time of predicting and generating the front collision based on the signals of the front sensor, the driving state detector, the passenger detector, and the front collision sensor. Control unit;
Seat apparatus for adjusting the position of the front seat and the rear seat according to the control signal of the control unit; And
A rear passenger seat airbag device installed on the seat of the front seat and deployed to operate toward the rear passenger according to a control signal of the controller;
Rear passenger protection device of a vehicle comprising a.
The method according to claim 1,
The control unit calculates the risk of collision with the preceding vehicle from the signals of the front sensor and the driving state detector while the passenger is seated at the rear seat, and sets the positions of the front and rear seats when a forward collision is predicted from the calculated collision risk. A rear passenger protection device for a vehicle, characterized by outputting a control signal for moving to a reference position.
The method according to claim 2,
And the control unit operates the rear passenger protective airbag device when the front collision of the vehicle is detected through the front collision sensor while moving the positions of the front and rear seats to the reference position.
The method according to claim 2 or 3,
The control unit moves the positions of the front seats and the rear seats to the reference position at the time before the collision after predicting the front collision, and sets a threshold value for determining whether the rear passenger passenger airbag device is operated and the timing of the operation according to the acceleration magnitude and the collision mode. Adjusting the value so that the airbag deployment time (TTF) is set according to the adjusted threshold value after the front collision.
The method according to claim 2,
A rear seat passenger seat belt device having a pretensioner which performs an instant pulling operation of the seat belt according to a control signal of the controller; And
A seat belt sensor for detecting seat belt wearing of a rear passenger;
The rear seat of the vehicle, wherein the control unit operates the pretensioner when the front collision of the vehicle occurs in the reference position movement state of the front seat and the rear seat when the control unit detects seat seat wearing of the rear seat passenger through a seat belt sensor. Passenger protection device.
The method according to claim 5,
The control unit moves the positions of the front seats and the rear seats to the reference position at the time before the collision after the front collision prediction, and adjusts the threshold values for determining whether or not the pretensioner is operated and the timing according to the acceleration magnitude and the collision mode. And a pretensioner operating time (TTF: Time To Fire) according to the adjusted threshold value after the front collision.
The method according to claim 2,
Position control of the front seats and rear seats includes the front and rear sliding position control to the reference position and seat back angle control.
Detecting a passenger seated on the rear seat by the passenger detector;
Receiving, by the control unit, preceding vehicle information detected through the front sensor during driving of the vehicle while the passenger of the rear seat is detected and driving state information of the own vehicle detected by the driving state detection unit;
The control unit calculates the risk of collision with the preceding vehicle from the preceding vehicle information and the driving state information of the own vehicle, and when the forward collision is predicted from the calculated collision risk, a control signal for moving the positions of the front and rear seats to the set reference positions. Outputting;
Moving, by the seat apparatus, the positions of the front seats and the rear seats to a reference position according to the control signal; And
Operating the rear passenger protective airbag device when the controller detects a front collision of the vehicle through a front collision sensor;
Control method for protecting the rear passengers of the vehicle comprising a.
The method according to claim 8,
The control unit moves the positions of the front seats and the rear seats to the reference position at the time before the collision after predicting the front collision, and sets a threshold value for determining whether the rear passenger passenger airbag device is operated and the timing of the operation according to the acceleration magnitude and the collision mode. Adjusting the value so that the airbag deployment time (TTF) is set according to the adjusted threshold value after the front collision.
The method according to claim 8,
Detecting a seat belt wearing state of the rear passenger by the seat belt sensor; And
Operating the pretensioner of the rear passenger seat belt device when the controller detects a front collision of the vehicle in a state where the seat belt wearing of the rear passenger is detected;
Control method for protecting the rear passengers of the vehicle, characterized in that it further comprises.
The method of claim 10,
The control unit moves the positions of the front seats and the rear seats to the reference position at the time before the collision after the front collision prediction, and adjusts the threshold values for determining whether or not the pretensioner is operated and the timing according to the acceleration magnitude and the collision mode. And controlling the pretensioner time to fire (TTF) according to the adjusted threshold value after the front collision.
The method according to claim 8,
Position control of the front seats and rear seats control for the rear passengers of the vehicle, characterized in that the front and rear sliding position control to the reference position and seat back angle control.

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