JP2006160066A - Airbag deployment control device, and airbag deployment control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag deployment control device, and an airbag deployment control method capable of controlling the deployment of an airbag according to a collision mode in a collision in the longitudinal direction of a vehicle. <P>SOLUTION: The airbag deployment control device comprises first and second acceleration detection means (15, 16) which are arranged on the right and left sides forward of a vehicle to detect the longitudinal acceleration on the right and left sides, right and left airbags (11, 12) to be respectively deployed to right and left sides in a cabin, and an airbag deployment control means to deploy the airbag on the side of the higher longitudinal acceleration out of the right and left airbags when the difference between the right and left longitudinal accelerations detected by the first and second acceleration detection means is not less than a predetermined value. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle airbag deployment control device and airbag deployment control means for controlling deployment of an airbag.

  An air bag device is mounted on a vehicle to protect an occupant during a vehicle collision. An occupant protection device such as an air bag device is controlled to start based on a temporal change in acceleration detected by an accelerometer mounted on the vehicle. However, since the occupant's movement direction, movement amount, movement timing, and the like at the time of a vehicle collision vary depending on the type of the collision, it is required to start the airbag device more appropriately according to the type of the collision.

For example, an occupant protection device that discriminates the form of a collision based on the difference or ratio of longitudinal acceleration detected by accelerometers arranged on the left and right of the front portion of the vehicle has been proposed (see, for example, Patent Document 1). According to the occupant protection device, it is possible to discriminate between a symmetric collision (full lap collision) in which the entire front surface of the vehicle collides and an asymmetric collision (offset collision) in which one side of the front of the vehicle collides. Activating an air bag that protects the passenger from the dash panel. In addition, an occupant protection device has been proposed in which an acceleration watch is provided on the side of the vehicle, and when an impact is detected from the vehicle measurement, an airbag is deployed on the side of the vehicle interior to mitigate the impact from the vehicle measurement. (For example, refer to Patent Document 2).
Japanese Patent Laid-Open No. 10-086787 Japanese Patent Laid-Open No. 11-278200

  However, the occupant protection device described in Patent Document 1 detects an impact in front of the vehicle and deploys an airbag from the front of the vehicle, and the occupant protection device described in Patent Document 2 detects impact on the side of the vehicle and The airbag is deployed on the side surface. That is, no occupant protection device has been proposed so far in which an airbag is deployed on the side surface of the passenger compartment against an impact in front of the vehicle.

  When an offset collision occurs, acceleration other than the front-rear direction is generated in the vehicle, and the occupant may move to a side surface in the vehicle compartment under the influence of centrifugal force, for example. Therefore, until now, there has been a problem that deployment control of the airbag deployed on the side surface portion of the passenger compartment has not been sufficiently taken into consideration for a collision from the front of the vehicle.

  In view of the above problems, an object of the present invention is to provide an airbag deployment control device and an airbag deployment control method that control deployment of an airbag according to a collision mode with respect to a collision in the vehicle longitudinal direction.

  In order to solve the above problem, the present invention includes first and second acceleration detection means (a right front collision sensor 15 and a left front collision sensor 16) that are respectively disposed on the left and right of the front of the vehicle and detect the longitudinal acceleration of each of the left and right. The difference between the left and right airbags (the right curtain airbag 11 and the left curtain airbag 12) deployed on the left and right side surfaces of the vehicle compartment and the left and right longitudinal acceleration detected by the first and second acceleration detecting means is predetermined. In the above case, there is provided an airbag deployment control device comprising airbag deployment control means for deploying the airbag having a larger longitudinal acceleration among the left and right airbags.

  ADVANTAGE OF THE INVENTION According to this invention, the airbag expansion | deployment control apparatus which controls expansion | deployment of an airbag with respect to the collision of a vehicle front-back direction according to a collision form can be provided. In the case of an offset collision in which a large impact is applied to either the left or right side of the vehicle from the front of the vehicle, the vehicle turns due to the impact at the time of the collision, and the occupant is moved in the lateral direction of the vehicle body by the centrifugal force generated at that time. According to this, since the airbag is deployed on the side surface of the vehicle compartment on the side where the offset collision has occurred, the impact received by the occupant moved in the side surface direction of the vehicle body can be reduced.

  Moreover, in one form of this invention, it has the 3rd acceleration detection means (floor G sensor 17) arrange | positioned rather than the 1st and 2nd acceleration detection means, and an airbag expansion | deployment control means is 1st. When the longitudinal acceleration detected by the acceleration detecting means 3 is larger than a predetermined value, the airbag is deployed.

  According to the present invention, even when an offset collision occurs and the difference in acceleration detected by the first and second acceleration detecting means is larger than a predetermined value, the collision detected by the third acceleration detecting means is smaller than the predetermined value. In this case, since the airbag is not deployed, the replacement cost of the airbag can be reduced.

  In one embodiment of the present invention, the vehicle has yaw rate detection means for detecting the yaw rate of the vehicle, and the airbag deployment control means deploys the airbag when the yaw rate detected by the yaw rate detection means is larger than a predetermined value. It is characterized by.

  According to the present invention, since the airbag is deployed by detecting that the vehicle after the offset collision has started turning, the airbag can be deployed in a situation where the airbag on the side surface in the vehicle compartment is required.

  Further, in one aspect of the present invention, there is provided a vehicle window open / closed state detection means for detecting whether the vehicle window is open or closed, and the airbag deployment control means detects that the vehicle window is open by the vehicle window open / closed state detection means , Characterized by deploying an airbag.

  According to the present invention, the airbag can be deployed when the vehicle window is open and there is a possibility that the occupant may be discharged outside the vehicle or cause a part of the body to protrude.

  The present invention also relates to an airbag deployment control method for deploying and controlling left and right airbags that are deployed on the left and right side surfaces of a vehicle compartment. When the difference in acceleration is greater than or equal to a predetermined value, the airbag on the side of the left and right airbags on which the longitudinal acceleration is large is deployed.

  Moreover, in one form of this invention, when the yaw rate detected by the yaw rate detection means which detects the yaw rate of a vehicle is larger than predetermined, an airbag is expand | deployed, It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the airbag expansion | deployment control apparatus and airbag deployment control method which control expansion | deployment of an airbag according to the collision form with respect to the collision of the vehicle front-back direction can be provided.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below with reference to the accompanying drawings with examples. FIG. 1 is a schematic plan view of a vehicle to which an airbag deployment control device is applied. A vehicle 10 equipped with an airbag deployment control device includes a right curtain airbag 11 and a left curtain airbag 12, a driver airbag 13 and a passenger airbag 14, and an electric controller (hereinafter referred to as an airbag ECU). 18 includes a right front satellite sensor (hereinafter referred to as a right front collision sensor) 15, a left front satellite sensor (hereinafter referred to as a left front collision sensor) 16, a right side collision sensor 8, a left side collision sensor 9, and a floor G sensor 17.

  The right front collision sensor 15 is a side member on the right side of the vehicle, and is attached to a position in the vicinity of the foremost portion of the vehicle 10, and is an acceleration sensor that detects longitudinal acceleration generated at this attachment site. Similarly, the left front collision sensor 16 is an acceleration sensor that is a side member on the left side of the vehicle and is attached to a position in the vicinity of the foremost portion of the vehicle, and detects longitudinal acceleration generated at this attachment site.

  The right front collision sensor 15 and the left front collision sensor 16 are acceleration sensors for detecting whether or not an impact greater than a predetermined reference value has been applied to the vehicle. When a longitudinal acceleration greater than a predetermined reference value is applied to the vehicle, The switch is turned on and an on signal is output.

  The floor G sensor 18 is arranged behind the right front collision sensor 15 and the left front collision sensor 16, preferably in the approximate center of the vehicle (for example, the outer periphery of the floor tunnel), and in the longitudinal direction of the vehicle 10 generated at the center of the vehicle. Acceleration is detected. When the floor G sensor 18 detects an acceleration equal to or higher than a predetermined reference value in the vehicle, an internal switch is turned on and an on signal is output.

  The reference values of the right front collision sensor 15, the left front collision sensor 16, and the floor G sensor 17 are applied to the vehicle 10 with an impact that is not sufficient to activate the driver seat airbag 13 and the passenger seat airbag 14 due to a frontal collision. In a case (for example, a collision at a low speed of 10 km / h to 20 km / h) or when the vehicle 10 is traveling on a rough road, the value is set larger than the detected impact value. The predetermined reference value may be the same for the right front collision sensor 15 or the left front collision sensor 16 and the floor G sensor 17, or another acceleration may be set as the reference value.

  The vehicle 10 also includes a well-known driver's seat airbag 13 and passenger seat airbag 14. The driver's seat airbag 13 is accommodated in the central portion of the steering wheel, and is inflated from the central portion of the steering wheel to the rear of the vehicle when deployed, thereby protecting the driver's chest and the like. The passenger seat airbag 14 is accommodated in a dash panel in front of the passenger seat, and is inflated rearward from the dash panel during deployment to protect the chest of the passenger in the passenger seat. When any one or more of the right front collision sensor 15, the left front collision sensor 16, and the floor G sensor 17 detect a longitudinal acceleration that is equal to or greater than a predetermined reference value, the driver's seat airbag 13 and / or the passenger's seat airbag 14 are deployed. Is done.

  The right side collision sensor 8 is attached to the lower part of the right center pillar, and detects lateral acceleration generated in the right center pillar. The right measuring sensor 8 turns on an internal switch and outputs an ON signal when it detects a lateral acceleration equal to or greater than a predetermined reference value. Similarly, the left side collision sensor 9 is attached to the lower part of the left center pillar and detects lateral acceleration generated in the left center pillar. The left measuring sensor 9 turns on an internal switch and outputs an ON signal when it detects a lateral acceleration of a predetermined value or more.

  As shown in FIG. 2A, the right curtain airbag 11 is assembled to the front pillar of the vehicle body at the mounting portion 11a at the front end, and is assembled to the roof side rail of the vehicle body at the plurality of mounting portions 11b. Thus, when the vehicle is unfolded, substantially the entire right front window and right rear window of the vehicle are covered, thereby preventing the occupant's body from moving outside the vehicle or being released outside the vehicle. Note that the right curtain airbag 11 in FIG. 2A is an example of an airbag disposed on the right side of the vehicle interior. In the present embodiment, as shown in FIG. The so-called side airbag 19 in which the airbag is deployed may be used. That is, the left and right curtain airbags are examples of airbags that are deployed in regions including the upper side of the belt line on the left and right sides of the vehicle interior.

  In the present embodiment, as described later, when the vehicle has an offset collision at an acceleration equal to or higher than a predetermined reference value, the airbag is controlled to deploy the curtain airbag on the offset collision side. Also, the right curtain airbag 11 is known when the right projection sensor 8 detects an acceleration greater than a predetermined value, and the left curtain airbag 12 is known when the left projection sensor 9 detects an acceleration greater than a predetermined value. It is developed by the control method.

  Next, functions of the airbag deployment control device will be described based on the functional block diagram of FIG. The airbag ECU 18 is a microcomputer including a control unit 32, a ROM 33, a RAM 34, an input / output interface 31 and the like connected to each other via a bus. The control unit 32 is configured to execute the program stored in the ROM 33 while using the temporary storage function of the RAM 34.

  The input / output interface 31 is connected to the right front collision sensor 15, the left front collision sensor 16, the right measurement sensor 8, the left measurement sensor 9, and the floor G sensor 17, and the control unit 32 receives ON signals from these sensors. Is done. The input / output interface 31 is connected to a drive circuit 35 for deploying the airbag. Upon receiving an ON signal, the control unit 32 sends the drive circuit 32 to the right curtain airbag 11 or the left curtain airbag 12. The operation signal for deploying is output. The squib of the right curtain airbag 11 or the left curtain airbag 12 is ignited by the operation signal, and the gas generating agent burns instantaneously, and the right curtain airbag 11 or the left curtain airbag 12 is inflated. The driver seat airbag 13 and the passenger seat airbag 14 are omitted.

  Based on the configuration of FIGS. 1 to 3, the deployment control of the right curtain airbag 11 or the left curtain airbag 12 by the airbag deployment control device in an offset collision will be described. FIG. 4 is a flowchart illustrating an example of a control procedure in which the airbag ECU 18 controls the deployment of the right curtain airbag 11 or the left curtain airbag 12 when an offset collision occurs.

  In the control procedure according to the flowchart of FIG. 4, when an acceleration equal to or higher than a predetermined reference value is detected by at least one of the right front collision sensor 15 or the left front collision sensor 16 (when an ON signal is detected), an interrupt is generated. (S11).

  When an on signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the right front collision sensor 15 (step S11), the airbag ECU 18 detects longitudinal acceleration greater than or equal to a predetermined reference value from the left front collision sensor 16. It is determined whether or not (ON signal is detected) (S12). When the on signal is not detected from the left front collision sensor 16 (No in step S12), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S13).

  When the ON signal is detected from the floor G sensor 17 (Yes in step S13), an offset collision greater than a predetermined reference value has occurred in the right front portion of the vehicle. 11 is developed (S100). A driver's seat and / or a passenger's seat airbag may be deployed together with the right curtain airbag 11. When the on signal is not detected from the floor G sensor 17 (No in step S13), the processing by the control unit in FIG. 4 ends.

  In step S11, when an ON signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the left front collision sensor 16 (step S11), the airbag ECU 18 receives a value greater than or equal to a predetermined reference value from the right front collision sensor 15. It is determined whether longitudinal acceleration is detected (ON signal is detected) (S15). When the on signal is not detected from the right front collision sensor 15 (No in step S15), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S16).

  When the ON signal is detected from the floor G sensor 17 (Yes in step S16), an offset collision greater than a predetermined reference value has occurred in the left front portion of the vehicle. 12 is developed (S101). A driver's seat and / or a passenger's seat airbag may be deployed together with the left curtain airbag 12. When the on signal is not detected from the floor G sensor 17 (No in step S16), the processing by the control unit in FIG. 4 ends.

  When an on signal is detected from the left front collision sensor 16 (Yes in step S12) or when an on signal is detected from the right front collision sensor 15 (Yes in step S15), the airbag ECU 18 detects the floor G sensor. It is determined whether an ON signal is detected from 17 (S18). When an ON signal is detected from the floor G sensor 17, it can be determined that the vehicle 10 has had a frontal collision greater than a predetermined reference, so the driver's seat airbag 13 and / or the passenger's seat airbag 14 are deployed. Is preferred (S99).

  That is, according to the control means of FIG. 4, when an ON signal is detected from either the right front collision sensor 15 or the left front collision sensor 16, that is, the longitudinal acceleration detected by the right front collision sensor 15 and the left front collision sensor 16 are detected. If the difference between the longitudinal accelerations detected by the above is greater than or equal to a predetermined value, it is determined that an offset collision has occurred. When the impact of the vehicle is greater than or equal to a predetermined reference value, the curtain airbag on the side of the right front collision sensor 15 or the left front collision sensor 16 that has the greater impact can be deployed.

  The offset collision may be determined by any method such as performing a predetermined calculation based on the respective longitudinal accelerations detected by the right front collision sensor 15 or the left front collision sensor 16.

  FIG. 5 is a logic circuit diagram showing the control procedure shown in FIG. That is, according to FIG. 5, when the left front collision sensor 16 detects a longitudinal acceleration greater than or equal to a predetermined reference value and the right front collision sensor 15 does not detect a longitudinal acceleration greater than or equal to a predetermined reference value, the AND circuit 51 Turn on. When the ON signal of the AND circuit 51 is input to the AND circuit 53 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 53 is turned on, so that the left curtain airbag 12 is deployed. Is done.

  Similarly, the AND circuit 52 is turned on when the right front collision sensor 15 detects longitudinal acceleration equal to or greater than a predetermined reference value and the left front collision sensor 16 does not detect longitudinal acceleration equal to or greater than a predetermined reference value. . When the ON signal of the AND circuit 52 is input to the AND circuit 54 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 54 is turned ON, so that the right curtain airbag 11 is deployed. Is done.

  The effect of this embodiment will be described with reference to FIG. When the vehicle travels in the direction of the arrow 61 as shown in FIG. 6A and the right front of the vehicle collides with the obstacle 62 by an offset collision, the front of the vehicle as shown by the arrow 63 in FIG. Move clockwise. In the case of FIG. 6B, the right front collision sensor 15 outputs an on signal, and the left front collision sensor 16 does not output an on signal. When the vehicle moves clockwise as indicated by an arrow 64 in FIG. 6 (c), the occupant receives centrifugal force toward the right side of the vehicle, but the airbag deployment control device deploys the right curtain airbag 11, so that the occupant is outside the vehicle. It is possible to prevent the body from being released from the vehicle or protruding a part of the body from the vehicle. If the occupant is released to the outside of the vehicle or protrudes from a part of the body, the occupant may come into contact with the following vehicle or the like, but this situation can be prevented by the airbag deployment control device of this embodiment.

  Further, in the airbag deployment control device of the present embodiment, when both the right front collision sensor 15 and the left front collision sensor 16 output an ON signal (when a full collision occurs in front of the vehicle), or the right front collision sensor 15 or the left front Even if any of the bump sensors 16 outputs an ON signal, if the floor G sensor 17 does not output an ON signal (in the case of a slight offset collision), none of the curtain airbags will be deployed, so it will be released like a frontal collision. The curtain airbag is not deployed when there is no fear of this, and unnecessary replacement of the curtain airbag can be reduced.

  In the second embodiment, an airbag deployment control device that performs control not to deploy the curtain airbag when the vehicle window (side door glass) is closed will be described. FIG. 7 is a schematic plan view of a vehicle to which the airbag deployment control device of this embodiment is applied. In FIG. 7, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  The airbag deployment control device of FIG. 7 is configured to include vehicle window open / closed state detection sensors 21, 22, 23, and 24 that detect the open / closed state of the vehicle window. The vehicle window open / closed state detection sensor is arranged for each vehicle window, and outputs an ON signal to the airbag ECU 18 in a state where the vehicle window is closed. The vehicle window open / closed state detection sensors 21 to 24 may be configured by arranging a switch pressed down by the movement of the door glass in the vehicle window that opens and closes up and down, or the arm of the window regulator moves to the upper end. You may comprise so that it may detect.

  FIG. 8 is a flowchart illustrating an example of a control procedure in which the airbag ECU 18 controls the deployment of the right curtain airbag 11 or the left curtain airbag 12 in accordance with the open state of the vehicle window. In the flowchart of FIG. 8, the same steps as those in FIG.

  In the control procedure shown in the flowchart of FIG. 8, when at least one of the right front collision sensor 15 or the left front collision sensor 16 detects a longitudinal acceleration equal to or greater than a predetermined reference value (when an ON signal is detected), an interrupt is generated. (S11).

  When an on signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the right front collision sensor 15 (step S11), the airbag ECU 18 detects longitudinal acceleration greater than or equal to a predetermined reference value from the left front collision sensor 16. It is determined whether or not (ON signal is detected) (S12). When the on signal is not detected from the left front collision sensor 16 (No in step S12), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S13).

  When the ON signal is detected from the floor G sensor 17 (Yes in step S13), the airbag ECU 18 then determines whether or not the right vehicle window is open (S21). If there are a plurality of vehicle windows on the right side of the vehicle and at least one of them is open, the airbag ECU 18 determines that the vehicle window is open (Yes in step S21), and deploys the right curtain airbag 11. (S100). A driver's seat and / or a passenger's seat airbag may be deployed together with the right curtain airbag 11. If the right vehicle window is not opened (No in step S21), the airbag ECU 18 ends the process without deploying the right curtain airbag 11.

  In step S11, when an ON signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the left front collision sensor 16 (step S11), the airbag ECU 18 receives a value greater than or equal to a predetermined reference value from the right front collision sensor 15. It is determined whether longitudinal acceleration is detected (ON signal is detected) (S15). When the on signal is not detected from the right front collision sensor 15 (No in step S15), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S16).

  When the ON signal is detected from the floor G sensor 17 (Yes in step S16), the airbag ECU 18 then determines whether or not the left vehicle window is open (S22). If there are a plurality of vehicle windows on the left side of the vehicle and at least one of them is open, the airbag ECU 18 determines that the vehicle window is open (Yes in step S22), and deploys the left curtain airbag 12. (S101). A driver's seat and / or a passenger's seat airbag may be deployed together with the left curtain airbag 12. If the right vehicle window is not opened (No in step S22), the airbag ECU 18 ends the process without deploying the left curtain airbag 12.

  The control procedure when the on signal is detected from the left front collision sensor 16 (Yes in step S12) or when the on signal is detected from the right front collision sensor 15 (Yes in step S15) is the same as that in FIG. Since there is, explanation is omitted.

  FIG. 9 is a logic circuit diagram showing the control procedure shown in FIG. In FIG. 9, the same parts as those in FIG. According to FIG. 9, when the left front collision sensor 16 detects a longitudinal acceleration that is equal to or greater than a predetermined reference value, and the right front collision sensor 15 does not detect a longitudinal acceleration that is equal to or greater than a predetermined reference value, the AND circuit 51 is turned on. Become. Further, when the ON signal of the AND circuit 51 is input to the AND circuit 53 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 53 is turned ON. Further, when the ON signal of the AND circuit 53 is input to the AND circuit 55 and the left vehicle window is lowered, the AND circuit 55 is turned on and the left curtain airbag 12 is deployed.

  Similarly, when the right front collision sensor 15 detects longitudinal acceleration equal to or greater than a predetermined reference value and the left front collision sensor 16 does not detect longitudinal acceleration equal to or greater than a predetermined reference value, the AND circuit 52 is turned on. When the ON signal of the AND circuit 52 is input to the AND circuit 54 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 54 is turned ON. Further, when the ON signal of the AND circuit 54 is input to the AND circuit 56 and the right vehicle window is lowered, the AND circuit 56 is turned on and the right curtain airbag 11 is deployed.

  According to the present embodiment, when the vehicle collides with an offset exceeding a predetermined reference value, the airbag deployment control device deploys the right or left curtain airbag, so that the occupant is discharged outside the vehicle, Protruding the part from the vehicle can be prevented.

  Even if the vehicle has an offset collision that exceeds a predetermined reference value, the curtain airbag is not deployed if the vehicle window is closed. If the car window is closed, there is no risk of occupants being released out of the car or causing parts of the body to protrude from the vehicle, so there is less need to deploy curtain airbags, and therefore unnecessary replacement of curtain airbags. Etc. can be reduced.

  In the third embodiment, an airbag deployment control device that performs control to deploy a curtain airbag when the vehicle turns by an offset collision will be described. FIG. 10 is a schematic plan view of a vehicle to which the airbag deployment control device of this embodiment is applied. In FIG. 10, the same parts as those in FIG.

  The airbag deployment control device of FIG. 10 is configured to have a yaw rate sensor 25 that detects the yaw rate of the vehicle. The yaw rate detection sensor 25 detects a rotational angular velocity around an axis (rolling axis) that passes through the center of gravity of the vehicle and extends in the front-rear direction of the vehicle, that is, a yaw rate.

  FIG. 11 is a flowchart illustrating an example of a control procedure in which the airbag ECU 18 detects the turning of the vehicle and controls the deployment of the right curtain airbag 36 or the left curtain airbag 37. In the flowchart of FIG. 11, the same steps as those in FIG.

  In the control procedure according to the flowchart of FIG. 11, when at least one of the right front collision sensor 15 and the left front collision sensor 16 detects a longitudinal acceleration equal to or greater than a predetermined reference value (when an ON signal is detected), an interrupt is generated. (S11).

  When an on signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the right front collision sensor 15 (step S11), the airbag ECU 18 detects longitudinal acceleration greater than or equal to a predetermined reference value from the left front collision sensor 16. It is determined whether or not (ON signal is detected) (S12). When the on signal is not detected from the left front collision sensor 16 (No in step S12), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S13).

  When the ON signal is detected from the floor G sensor 17 (Yes in Step S13), the airbag ECU 18 determines whether or not the vehicle is turning based on the detection value of the yaw rate sensor 25 (S31). If it is determined that the vehicle is turning (Yes in step S31), the airbag ECU 18 deploys the right curtain airbag 11 (S100). A driver's seat and / or a passenger's seat airbag may be deployed together with the right curtain airbag 11. If it is determined that the vehicle is not turning (No in step S31), the airbag ECU 18 ends the process without deploying the right curtain airbag 11.

  In step S11, when an ON signal indicating that an impact greater than or equal to a predetermined reference value has been applied from the left front collision sensor 16 (step S11), the airbag ECU 18 receives a value greater than or equal to a predetermined reference value from the right front collision sensor 15. It is determined whether longitudinal acceleration is detected (ON signal is detected) (S15). When the on signal is not detected from the right front collision sensor 15 (No in step S15), the airbag ECU 18 determines whether or not an acceleration greater than a predetermined reference value is detected from the floor G sensor 17 (whether an on signal is output). Determine (S16).

  When the on signal is detected from the floor G sensor 17 (Yes in step S16), the airbag ECU 18 then determines whether or not the vehicle is turning (S32). If it is determined that the vehicle is turning (Yes in step S32), the airbag ECU 18 deploys the left curtain airbag 12 (S101). A driver's seat and / or a passenger's seat airbag may be deployed together with the left curtain airbag 12. If it is determined that the vehicle is not turning (No in step S32), the airbag ECU 18 ends the process without deploying the left curtain airbag 12.

  The control procedure when the on signal is detected from the left front collision sensor 16 (Yes in step S12) or when the on signal is detected from the right front collision sensor 15 (Yes in step S15) is the same as that in FIG. Since there is, explanation is omitted.

  FIG. 12 is a logic circuit diagram showing the control procedure shown in FIG. In FIG. 12, the same parts as those in FIG. According to FIG. 12, when the left front collision sensor 16 detects longitudinal acceleration equal to or greater than a predetermined reference value and the right front collision sensor 15 does not detect longitudinal acceleration equal to or greater than a predetermined reference value, the AND circuit 51 is turned on. Become. Further, when the ON signal of the AND circuit 51 is input to the AND circuit 53 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 53 is turned ON. Further, when the ON signal of the AND circuit 53 is input to the AND circuit 55 and it is determined that the vehicle is turning by the yaw rate sensor, the AND circuit 55 is turned on and the left curtain airbag 12 is deployed.

  Similarly, when the right front collision sensor 15 detects longitudinal acceleration equal to or greater than a predetermined reference value and the left front collision sensor 16 does not detect longitudinal acceleration equal to or greater than a predetermined reference value, the AND circuit 52 is turned on. When the ON signal of the AND circuit 52 is input to the AND circuit 54 and the floor G sensor 17 detects an acceleration equal to or higher than a predetermined reference value, the AND circuit 54 is turned ON. Furthermore, when the ON signal of the AND circuit 54 is input to the AND circuit 56 and it is determined that the vehicle is turning by the yaw rate sensor, the AND circuit 56 is turned on and the right curtain airbag 11 is deployed.

  According to the present embodiment, when the vehicle collides with an offset exceeding a predetermined reference value, the airbag deployment control device deploys the right or left curtain airbag, so that the occupant is discharged outside the vehicle, Protruding the part from the vehicle can be prevented.

  Further, in this embodiment, since the presence or absence of turning of the vehicle is determined together with the determination of the offset collision, the necessity of deploying the curtain airbag can be determined with higher accuracy. If it is not turning, the curtain airbag on the right side or the left side is not deployed, so unnecessary replacement of the curtain airbag can be reduced.

  In addition, while determining the presence or absence of a turn based on a yaw rate, you may add the determination of the opening / closing state of a vehicle window. That is, even when an offset collision exceeding a predetermined reference value and turning of the vehicle are detected, the deployment of the airbag can be controlled so that the curtain airbag is not deployed when the vehicle window is not open. According to such control, the necessity of deploying the curtain airbag can be determined with higher accuracy, and if the vehicle window is not open, the right or left curtain airbag will not be deployed. Can be reduced.

  As described above, according to the first to third embodiments, the curtain airbag can be deployed on the side surface of the passenger compartment according to the collision mode even in the case of a collision in the longitudinal direction of the vehicle, and the occupant releases the vehicle outside the vehicle. Or projecting a part of the body from the vehicle.

1 is a schematic plan view of a vehicle to which an airbag deployment control device is applied. It is a figure which shows an example of the expand | deployed side airbag. It is a functional block diagram of an airbag deployment control device. It is a flowchart figure which shows an example of the control procedure which controls the expansion | deployment of a curtain airbag. It is a logic circuit diagram of the control procedure of FIG. It is a figure which shows an example of the vehicle which carried out the offset collision. It is a schematic plan view of the vehicle to which the airbag deployment control apparatus of Example 2 was applied. It is a flowchart figure which shows an example of the control procedure which controls the expansion | deployment of the curtain airbag in Example 2. FIG. FIG. 9 is a logic circuit diagram illustrating the control procedure of FIG. 8. It is a schematic plan view of the vehicle to which the airbag deployment control apparatus of Example 3 was applied. FIG. 10 is a flowchart illustrating an example of a control procedure for controlling the deployment of the curtain airbag in the third embodiment. It is a logic circuit diagram of the control procedure of FIG.

Explanation of symbols

8 Right measurement sensor 9 Left measurement sensor 10 Vehicle 11 Right curtain airbag 12 Left curtain airbag 15 Right front satellite sensor (right front collision sensor)
16 Left front satellite sensor (left collision sensor)
17 Floor G sensor 17
18 Airbag ECU
19 Side Airbag 21-24 Car Window Open / Closed State Detection Sensor 25 Yaw Rate Sensor

Claims (6)

First and second acceleration detecting means disposed on the left and right of the front of the vehicle, respectively, for detecting longitudinal acceleration on the left and right respectively;
Left and right airbags deployed on the left and right sides of the vehicle compartment,
When the difference between the left and right longitudinal accelerations detected by the first and second acceleration detecting means is greater than or equal to a predetermined value, the airbag deployment control means deploys the airbag having the larger longitudinal acceleration among the left and right airbags. When,
An airbag deployment control device comprising: Having third acceleration detection means arranged behind the vehicle from the first and second acceleration detection means;
The airbag deployment control means deploys the airbag when the longitudinal acceleration detected by the third acceleration detection means is greater than a predetermined value;
The airbag deployment control device according to claim 1. A yaw rate detecting means for detecting the yaw rate of the vehicle;
The airbag deployment control means deploys the airbag when the yaw rate detected by the yaw rate detection means is greater than a predetermined value;
The airbag deployment control device according to claim 1 or 2. A vehicle window open / closed state detecting means for detecting an open or closed state of the vehicle window;
The airbag deployment control means deploys the airbag when the vehicle window open / closed state detection means detects that the vehicle window is open.
The airbag deployment control device according to any one of claims 1 to 3, wherein In an airbag deployment control method for deploying and controlling left and right airbags deployed on left and right side surfaces in a vehicle compartment,
When the difference in longitudinal acceleration detected by the left and right acceleration detecting means is greater than or equal to a predetermined distance, the airbag on the side having the larger longitudinal acceleration is deployed.
The airbag deployment control method characterized by the above-mentioned. If the yaw rate detected by the yaw rate detection means for detecting the yaw rate of the vehicle is greater than a predetermined value, the airbag is deployed.
The airbag deployment control method according to claim 5.

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