JP5417749B2 - Vehicle seat and vehicle seat control method - Google Patents

Description

  The present invention relates to a vehicle seat for adjusting a driver's posture and a vehicle seat control method.

Conventionally, for the purpose of controlling the side support position of the seat to match the tension of the driver, detects the occurrence frequency of the lateral acceleration generated in the vehicle body, when the occurrence frequency is large, than normal A technique for holding the side support position for a long peak hold time has been proposed (see Patent Document 1).
Japanese Patent Laid-Open No. 5-229372

  By the way, in the conventional technique described in Patent Document 1 described above, the position of the side support is made variable, and the strength of the support is made variable in proportion to the lateral acceleration. However, in the conventional technique, in the case of a driver having a low driving skill, there is a problem that the steering becomes unstable due to the body movement.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and can be used for a vehicle seat and a vehicle that can perform more stable driving steering even in the case of a driver with low driving skill. An object of the present invention is to provide a sheet control method.

  The vehicle seat and the vehicle seat control method according to the present invention calculate the lateral acceleration generated in the vehicle body, detect the driver's skill level, and based on the calculated lateral acceleration, The operation amount of the side support for suppressing body movement to the vehicle is calculated, and the calculated operation amount is corrected based on the detected skill level of the driver.

  According to the vehicle seat and the vehicle seat control method according to the present invention, the operation amount of the side support is corrected based on the skill level of the driver. However, it is possible to prevent the steering steering from becoming unstable due to body movement, and to perform more stable driving steering.

  Hereinafter, a vehicle seat as a preferred embodiment of the present invention will be specifically described.

[First Embodiment]
[Configuration of vehicle seat]
As shown in FIG. 1, a vehicle seat shown as a first embodiment of the present invention includes a seat cushion 1 slidable in the front-rear direction, a seat back 2 attached to the seat cushion 1 so as to be tiltable, and the seat. And a headrest 3 attached to the upper end of the back 2 so as to be adjustable in the front-rear and up-down directions.

Side supports 10 </ b> R and 10 </ b> L are provided on both sides of the seat back 2 for suppressing the body movement of the occupant in the left-right direction. As shown in FIG. 2, side support frames 11 </ b> R and 11 </ b> B are embedded in the side supports 10 </ b> R and 10 </ b> L, and one end of each of the side support frames 11 </ b> R and 11 </ b> B is connected via a connecting rod 12. Yes. The side support frames 11R and 11B are in a standard state in which the side support frames 11R and 11B are inclined outward by a predetermined angle θR + 90 ° and θL + 90 ° with respect to the main surface of the seatback 2, respectively. The pressure adjustment mechanism can be driven so as to incline inward from the main surface of the seat back 2 from this standard state. As a result, the side supports 10R and 10L can be adjusted in a closing angle or an opening direction within a displacement angle range of 0 ° to θ _max when the pinching angle in the standard state is 0 °. Apply pressing force.

  Such a vehicle seat drives the side supports 10R and 10L by a control mechanism as shown in FIG. That is, the vehicle seat includes a steering smoothness calculating unit 23 that calculates the steering steering smoothness based on the steering rudder angle detected by the rudder angle sensor 21 and the vehicle speed detected by the vehicle speed sensor 22, and the rudder angle sensor 21. The lateral acceleration calculation unit 24 that calculates the lateral acceleration generated in the vehicle body based on the steering angle information detected by the vehicle speed information and the vehicle speed information detected by the vehicle speed sensor 22, and the steering steering calculated by the steering smoothness calculation unit 23. A driver skill level detection unit 25 that detects the driver's skill level based on the smoothness of the driver, and a support operation amount that calculates the operation amount of the side supports 10R and 10L based on the lateral acceleration calculated by the lateral acceleration calculation unit 24 The driver's skill level detected by the calculation unit 26 and the driver skill level detection unit 25 Accordingly, a support operation amount correction unit 27 that corrects the operation amount calculated by the support operation amount calculation unit 26, and a post-correction support operation that calculates the operation amounts of the side supports 10R and 10L corrected by the support operation amount correction unit 27. A quantity calculation unit 28.

  The steering smoothness calculation unit 23 measures the steering angle information supplied from the steering angle sensor 21 that detects the steering angle by measuring the output of the rotation angle of the steering wheel, the rotational speed of the wheel, and the rotation on the output side of the transmission. The smoothness of the steering operation of the driver is calculated based on the vehicle speed information supplied from the vehicle speed sensor 22 that detects the vehicle speed of the host vehicle by measuring the number. The steering smoothness calculation unit 23 supplies the calculated steering steering smoothness information to the driver skill level detection unit 25.

  The lateral acceleration calculation unit 24 calculates the lateral acceleration generated in the vehicle body based on the steering angle information supplied from the steering angle sensor 21 and the vehicle speed information supplied from the vehicle speed sensor 22. The lateral acceleration calculation unit 24 supplies the calculated lateral acceleration information to the support operation amount calculation unit 26.

  The driver skill level detection unit 25 detects a difference between the driver skill level and the standard skill level based on the steering steering smoothness information supplied from the steering smoothness calculation unit 23. Here, the driver skill level detection unit 25 performs steering at the operation amount of the side supports 10R and 10L recorded in advance in the host vehicle from the start of traveling until a certain time has elapsed as a steering steering characteristic of a standard skill level driver. The operation amount of the side supports 10R and 10L is calculated by the support operation amount calculation unit 26 as steering characteristics. The driver skill level detection unit 25 supplies the detected driver skill level information to the support operation amount correction unit 27.

  The support operation amount calculation unit 26 calculates the operation amounts of the side supports 10R and 10L, that is, the displacement angles of the side support frames 11R and 11B, based on the lateral acceleration information supplied from the lateral acceleration calculation unit 24. Specifically, as shown in FIG. 4, the support operation amount calculation unit 26 calculates the displacement angle θs of the side support frames 11R and 11B as θs = Ks · Gy according to the lateral acceleration Gy. Ks is a coefficient having a predetermined positive value. Here, the operation amount of the side support 10R, 10L in the standard state calculated based on the lateral acceleration Gy is determined in advance by a plurality of curvature curves determined in advance by driving by a standard skill driver. When traveling at the specified vehicle speed, the amount of operation is necessary to support the body movement in the left-right direction to the minimum. The support operation amount calculation unit 26 supplies the calculated operation amount information to the support operation amount correction unit 27.

  The support operation amount correction unit 27 corrects the operation amount calculated by the support operation amount calculation unit 26 based on the driver's skill level information supplied from the driver skill level detection unit 25. Specifically, as shown in FIG. 4, when the driver's skill level is lower than the standard skill level, the support operation amount correction unit 27 sets the displacement angle θs of the side support frames 11R and 11B to θs = Calculated as a · Ks · Gy. Here, a is a coefficient composed of a predetermined positive value. That is, when the driver's skill level is lower than the standard skill level, the support operation amount correction unit 27 sets the inclination of the displacement angle θs of the side support frames 11R and 11B with respect to the lateral acceleration Gy to a times. The operation amount for the lateral acceleration Gy is made larger than the standard operation amount calculated by the support operation amount calculation unit 26. In other words, when the driver's skill level is lower than the standard skill level, the support operation amount correction unit 27 increases the pressing force applied to the driver according to the lateral acceleration Gy. The operating amount of 10L is corrected. The support operation amount correction unit 27 does not linearly change the displacement angle θs of the side support frames 11R and 11B with respect to the lateral acceleration Gy, but calculates it so as to change it into a smooth curve like a logarithmic function. You may do it. Further, as a result of detection by the driver skill level detection unit 25, the support operation amount correction unit 27 has a tendency to deteriorate the current steering steering characteristic as compared with the steering steering characteristic accumulated from the start of traveling until a certain time has elapsed. If it is, the operation amount of the side support frames 11R and 11B with respect to the lateral acceleration Gy calculated by the support operation amount calculation unit 26 is corrected according to the degree of deterioration to enhance the vehicle feeling. The support operation amount correction unit 27 supplies the calculated correction amount information to the post-correction support operation amount calculation unit 28.

  Based on the correction amount information calculated by the support operation amount correction unit 27, the corrected support operation amount calculation unit 28 calculates the corrected operation amounts of the side supports 10R and 10L. Then, the post-correction support operation amount calculation unit 28 drives and controls the drive motors 13R and 13L based on the calculated operation amount after correction.

[Operation of vehicle seat]
Such a vehicle seat operates the side supports 10R and 10L according to a series of procedures as shown in FIG.

  First, as shown in FIG. 5, when the vehicle speed of the host vehicle is detected by the vehicle speed sensor 22 in step S1, and the steering angle of the vehicle seat is detected by the steering angle sensor 21 in step S2, as shown in FIG. In step S <b> 3, the lateral acceleration calculating unit 24 calculates the lateral acceleration generated in the vehicle body based on the vehicle speed and the steering angle. At this time, the smoothness of the steering of the driver is calculated by the steering smoothness calculation unit 23 for the vehicle seat.

  Subsequently, in step S4, the vehicle seat calculates the operation amounts of the side supports 10R and 10L by the support operation amount calculation unit 26 based on the lateral acceleration calculated in step S3, and in step S5, step S3. The driver's skill level is detected by the driver skill level detection unit 25 based on the smoothness of the steering operation calculated in step S2.

  Subsequently, in step S6, the vehicle seat calculates the correction amount of the operation amount of the side support 10R, 10L calculated in step S4 based on the skill level of the driver detected in step S5. The corrected operation amount of the side supports 10R and 10L is calculated by the corrected support operation amount calculation unit 28 based on the correction amount calculated in step S6.

  In step S8, the vehicle seat drives and controls the drive motors 13R and 13L based on the corrected operation amount calculated in step S7. In step S9, the side supports 10R and 10L are operated, End the operation.

  By performing such a series of operations, the vehicle seat changes the pressing force by the side supports 10R and 10L according to the lateral acceleration generated in the vehicle body, thereby suppressing the movement of the occupant in the left-right direction. Can do.

  As described above in detail, in the vehicle seat shown as the first embodiment of the present invention, the lateral direction of the occupant is determined based on the lateral acceleration generated in the vehicle body calculated by the lateral acceleration calculation unit 24. The operation amount of the side support 10R, 10L for suppressing the body movement of the vehicle is calculated by the support operation amount calculation unit 26, and the support operation amount is calculated based on the skill level of the driver detected by the driver skill level detection unit 25 The operation amount calculated by the unit 26 is corrected by the support operation amount correction unit 27. Thereby, in this vehicle seat, it is possible to suppress the driver's body movement. Further, in the case of a driver with low driving skill, the operation amount calculated by the support operation amount calculation unit 26 is used. It is possible to correct and prevent the steering steering from becoming unstable due to body movement, and it becomes possible to perform more stable driving steering.

  Further, in this vehicle seat, the support operation amount calculation unit 26 operates in the left-right direction when a driver having a standard skill level drives and runs a plurality of predetermined curvature curves at a predetermined vehicle speed. The amount of actuation of the side supports 10R and 10L necessary to support the body movement is minimized. Thereby, in this vehicle seat, when a driver with a standard skill level is driving, when lateral acceleration is applied with the operation amounts of the side supports 10R and 10L calculated by the support operation amount calculation unit 26, Body movement can be minimized.

  Furthermore, in this vehicle seat, the skill level of the driver is detected by the driver skill level detection unit 25 on the basis of the steering steering characteristics of the driver, so that the skill level of the driver is appropriately determined. Can do.

  Furthermore, in this vehicle seat, the support operation amount calculation unit 26 is operated when a driver with a standard skill level drives and drives a plurality of predetermined curvature curves at a predetermined vehicle speed. The amount of operation of the side supports 10R and 10L necessary for supporting the body movement in the direction to the minimum is calculated, and the driver skill level detection unit 25 is recorded in advance in the host vehicle from the start of running until a certain time has elapsed. The driver's skill level is detected on the basis of the steering steering characteristic at the operation amount of the side support 10R, 10L and the operation amount calculated by the support operation amount calculation unit 26. Thereby, in this vehicle seat, the standard state can be made constant regardless of the skill level of the driver.

  Further, in this vehicle seat, the support operation amount correction unit 27 detects the current steering steering as compared with the steering steering characteristic accumulated from the start of traveling until a predetermined time has elapsed as a result of detection by the driver skill level detection unit 25. When a tendency of deterioration is observed in the characteristics, the operation amounts of the side supports 10R and 10L calculated by the support operation amount calculation unit 26 are corrected according to the degree of deterioration. Thereby, in this vehicle seat, for example, a decrease in driving skill due to an increase in fatigue due to long-time driving can be detected, and the operation amounts of the side supports 10R and 10L according to the state are set. Is possible.

  Further, in this vehicle seat, the support operation amount correction unit 27 determines the support operation amount calculation unit when the driver's skill level is lower than the standard skill level as a result of detection by the driver skill level detection unit 25. The relationship of the operation amount of the side supports 10R and 10L with respect to the lateral acceleration calculated by H.26 is set to a predetermined multiple. Thereby, in this vehicle seat, when the driver's skill level is lower than the standard skill level, the sensitivity is increased by making it larger than the operation amount of the side support 10R, 10L in the standard state at the same lateral acceleration. And driving skills can be improved.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
In the second embodiment, the side support operation pattern is different from that of the first embodiment. Therefore, in the second embodiment, the same parts as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[Configuration and operation of vehicle seat]
The vehicle seat shown as the second embodiment of the present invention has the configuration shown in FIGS. 1 to 3 and operates the side supports 10R and 10L according to a series of procedures shown in FIG. .

  In such a vehicle seat, the support operation amount calculation unit 26 calculates the displacement angle θs of the side support frames 11R and 11B as θs = Ks · Gy + θs0 according to the lateral acceleration Gy, as shown in FIG. Ks is a coefficient having a predetermined positive value, and θs0 is a predetermined initial displacement angle.

On the other hand, when the driver's skill level is lower than the standard skill level, the support operation amount correction unit 27 calculates the displacement angle θs of the side support frames 11R and 11B as θs = Ks · Gy + θs1. Here, θs1 is a predetermined angle larger than the initial displacement angle θs0 . That is, when the driver's skill level is lower than the standard skill level, the support operation amount correction unit 27 operates the side supports 10R and 10L from the lateral acceleration Gy lower than that of the standard skill level. The operating amounts of the side supports 10R and 10L are corrected so that the operating amounts of the side supports 10R and 10L are increased by a certain amount with respect to the same lateral acceleration Gy. Even in this case, the support operation amount correction unit 27 does not linearly change the displacement angle θs of the side support frames 11R and 11B with respect to the lateral acceleration Gy, but changes in a smooth curve like a logarithmic function. You may make it calculate so that it may carry out. Thereby, when the driver's skill level is lower than the standard skill level, the vehicle seat can suppress the body movement of the occupant in the left-right direction from the lower lateral acceleration Gy.

  As described above in detail, in the vehicle seat shown as the second embodiment of the present invention, the support operation amount correction unit 27 has a standardized skill level of the driver as a result of detection by the driver skill level detection unit 25. When the degree of skill is lower than that, the operation amounts of the side supports 10R and 10L with respect to the lateral acceleration calculated by the support operation amount calculation unit 26 are increased by a certain amount. Thus, in this vehicle seat, when the driver's skill level is lower than the standard skill level, the side supports 10R, 10L are operated from a lower lateral acceleration. Therefore, the side supports 10R, 10L are operated at the same lateral acceleration. The operating amount can be increased to increase sensitivity, and driving skills can be improved.

  As mentioned above, although embodiment which applied the invention made by the present inventors was described, this invention is not limited by description and drawing which make a part of indication of this invention by this embodiment. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

It is a perspective view shown about the composition of the vehicular seat shown as a 1st embodiment of the present invention. It is sectional drawing shown about the structure of the side support in the vehicle seat shown as 1st Embodiment of this invention. It is a block diagram shown about the composition of the control mechanism of the vehicular seat shown as a 1st embodiment of the present invention. It is a figure shown about the relationship of the displacement angle of the frame for side supports according to the lateral acceleration applied in the vehicle seat shown as 1st Embodiment of this invention. It is a flowchart shown about a series of procedures at the time of operating a side support in the vehicle seat shown as 1st Embodiment of this invention. It is a figure shown about the relationship of the displacement angle of the side support frame according to the lateral acceleration applied in the vehicle seat shown as 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat back 3 Headrest 10R, 10L Side support 11R, 11B Side support frame 12 Connecting rod 13R, 13L Drive motor 21 Steering angle sensor 22 Vehicle speed sensor 23 Steering smoothness calculation part 24 Lateral acceleration calculation part 25 Driver skill detection Unit 26 support operation amount calculation unit 27 support operation amount correction unit 28 corrected support operation amount calculation unit Gy lateral acceleration θs displacement angle of side support frame

Claims (7)

Lateral acceleration calculating means for calculating lateral acceleration generated in the vehicle body;
A driver skill level detecting means for detecting the driver's skill level based on the steering characteristics of the driver;
Based on the lateral acceleration calculated by the lateral acceleration calculating means, a support operation amount calculating means for calculating an operation amount of the side support for suppressing the body movement of the occupant in the left-right direction;
A support operation amount correction unit that corrects the operation amount calculated by the support operation amount calculation unit based on the driver's skill level detected by the driver skill level detection unit;
As a result of detection by the driver skill level detection means, the support operation amount correction means showed a tendency to deteriorate the current steering steering characteristics as compared with the steering steering characteristics accumulated from the start of traveling until a certain time has elapsed. In this case, the vehicle seat corrects the operation amount calculated by the support operation amount calculation means according to the degree of deterioration . The vehicle seat according to claim 1,
The support operation amount calculation means minimizes body movement in the left-right direction when a driver with a standard skill level drives and runs a plurality of predetermined curvature curves at a predetermined vehicle speed. A vehicle seat characterized in that an operation amount of the side support necessary for supporting the vehicle is calculated. The vehicle seat according to claim 1 ,
The support operation amount calculation means minimizes body movement in the left-right direction when a driver with a standard skill level drives and runs a plurality of predetermined curvature curves at a predetermined vehicle speed. The amount of operation of the side support necessary to support the vehicle is calculated, and the driver skill level detection means is the amount of operation of the side support recorded in advance in the host vehicle from the start of traveling until a predetermined time has elapsed. A vehicular seat, wherein the driver's skill level is detected based on a steering steering characteristic in an operation amount of the side support calculated by a support operation amount calculation means. The vehicle seat according to claim 1 ,
When the driver's skill level is lower than a standard skill level as a result of detection by the driver skill level detection unit, the support operation amount correction unit is configured to correct the lateral acceleration calculated by the support operation amount calculation unit. A vehicle seat characterized in that the relationship between the operation amounts of the side supports is a predetermined multiple. The vehicle seat according to claim 1 ,
When the driver's skill level is lower than a standard skill level as a result of detection by the driver skill level detection unit, the support operation amount correction unit is configured to correct the lateral acceleration calculated by the support operation amount calculation unit. A vehicle seat characterized in that the operation amount of the side support is increased by a certain amount. The vehicle seat according to claim 1,
When the driver's skill level is lower than the standard skill level as a result of detection by the driver skill level detection means, the support operation amount correcting means has a lower lateral acceleration than the standard skill level. The vehicle seat, wherein the side support is operated. A lateral acceleration calculating step for calculating a lateral acceleration generated in the vehicle body;
A driver skill level detecting step for detecting the driver's skill level based on the steering characteristics of the driver;
Based on the lateral acceleration calculated in the lateral acceleration calculation step, a support operation amount calculation step for calculating an operation amount of the side support for suppressing the body movement of the occupant in the left-right direction;
A support operation amount correction step of correcting the operation amount calculated in the support operation amount calculation step based on the skill level of the driver detected in the driver skill level detection step;
As a result of the detection in the driver skill level detection step, the current steering steering characteristic tended to deteriorate compared to the steering steering characteristic accumulated from the start of driving until a certain time has elapsed. In this case, the vehicle seat control method corrects the operation amount calculated in the support operation amount calculation step according to the degree of deterioration .

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