Method for adapting as a function of the driving situation and driving style, the side support of a person sitting in a vehicle seat, and a vehicle seat for this purpose

• US 6,037,731 A
• Filed: 11/13/1998
• Issued: 03/14/2000
• Est. Priority Date: 11/13/1997
• Status: Expired due to Fees

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Schmidt-Spalding, Helge, Schneider, Timo, Fruehauf, Frank, Kuhn, Klaus-Peter, Reichelt, Werner, Gimmler, Helmut
• Primary Examiner(s): IP, SHIK LUEN PAUL
• Application Number:
  US09/190,223
• Time in Patent Office: 487 Days
• Field of Search: 318/280-286, 318/600-632, 318/265, 318/266, 297/284 R, 297/284 E, 297/284 G, 297/DIG. 3, 297/468, 297/330
• US Class Current: 318/468
• CPC Class Codes: B60N 2/0244 with logic circuits
• CPC Class Codes: B60N 2/026 varying hardness or support of upholstery, e.g. for tuning seat comfort when driving curved roads
• CPC Class Codes: B60N 2/914 Hydro-pneumatic adjustments of the shape
• CPC Class Codes: B60N 2/986 Side-rests B60N2/2872, B60N2/885 take precedence
• CPC Class Codes: B60N 2/99 adjustable
• CPC Class Codes: B60W 40/09 Driving style or behaviour

Abstract

A method is provided for adapting the side support, as a function of the driving situation and driving styles, of a person sitting in the seat of a vehicle, in which method a lateral acceleration acting on the seat is determined as reference variable for the adaptation. In order to allow greater allowance for the way in which the sitting person senses lateral acceleration, as well as a comfortable sitting sensation with the advantages of a necessary side support which is built up in curves at short notice, the specific instantaneous lateral acceleration is weighted with the instantaneous driving speed of the vehicle. A control variable for the degree of adaptation is derived therefrom. In addition, a supplementary control variable is determined which brings about support of the driver on both sides in the seat as a function of the driving style. A vehicle seat in which this method is applied is specified.

Claims

1. A method for adjusting a side support of a vehicle seat, as a function of a driving situation and a driving style, for a person sitting in the seat, the method comprising the acts of:

determining a lateral acceleration acting on the seat as a reference variable;

determining an instantaneous driving speed of the vehicle; and

weighting the determined lateral acceleration with the instantaneous driving speed of the vehicle to transform the determined lateral acceleration into a sensed lateral acceleration which is sensed by a person sitting in the seat as a function of the driving speed to drive a control variable for controlling a degree of adjustment of the side support.

2. The method according to claim 1, wherein the weighting act is carried out by an algorithm.

3. The method according to claim 2, wherein the control variable is extracted from a first characteristic curve which describes a logical linking of the sensed lateral acceleration and a degree of side support on one side of the seat which is determined as desirable for said acceleration.

4. The method according to claim 1, wherein the driving style of the vehicle driver is classified and a supplementary control variable which is superimposed on the control variable is derived from a result of the classification.

5. The method according to claim 2, wherein the driving style of the vehicle driver is classified and a supplementary control variable which is superimposed on the control variable is derived from a result of the classification.

6. The method according to claim 3, wherein the driving style of the vehicle driver is classified and a supplementary control variable which is superimposed on the control variable is derived from a result of the classification.

7. The method according to claim 4, wherein the supplementary control variable is extracted from a second characteristic curve which prescribes a logical linking of driving styles and a degree of side support on both sides of the seat which is determined as desirable for said driving styles.

8. The method according to claim 5, wherein the supplementary control variable is extracted from a second characteristic curve which prescribes a logical linking of driving styles and a degree of side support on both sides of the seat which is determined as desirable for said driving styles.

9. The method according to claim 6, wherein the supplementary control variable is extracted from a second characteristic curve which prescribes a logical linking of driving styles and a degree of side support on both sides of the seat which is determined as desirable for said driving styles.

10. The method according to claim 3, wherein the side support is implemented by air cushions with adjustable air pressure which are integrated in at least one of the seat surface and backrest of the seat, and further wherein variables which are proportional to pressure values which are to be set in the air cushions are specified in the first characteristic curve as a measure of the side support, and still further wherein the pressure value corresponding to the supplementary control variable is applied in all the air cushions, and the pressure value corresponding to the control variable is applied exclusively in the air cushions which respectively lie on the outside of the seat during cornering.

11. The method according to claim 4, wherein the side support is implemented by air cushions with adjustable air pressure which are integrated in at least one of the seat surface and backrest of the seat, and further wherein variables which are proportional to pressure values which are to be set in the air cushions are specified in the first characteristic curve as a measure of the side support, and still further wherein the pressure value corresponding to the supplementary control variable is applied in all the air cushions, and the pressure value corresponding to the control variable is applied exclusively in the air cushions which respectively lie on the outside of the seat during cornering.

12. The method according to claim 7, wherein the side support is implemented by air cushions with adjustable air pressure which are integrated in at least one of the seat surface and backrest of the seat, and further wherein variables which are proportional to pressure values which are to be set in the air cushions are specified in the first and second characteristic curves as a measure of the side support, and still further wherein the pressure value corresponding to the supplementary control variable is applied in all the air cushions, and the pressure value corresponding to the control variable is applied exclusively in the air cushions which respectively lie on the outside of the seat during cornering.

13. A vehicle seat side support adjusting system for a person sitting in the vehicle seat, comprising:

a seat component;

a backrest;

an adjustable side support system formed in at least one of the seat component and the backrest;

a control unit which adjusts the adjustable side support as a function of a lateral acceleration acting on the vehicle seat, said control unit generating a control variable which determines a degree of adjustment from an instantaneous lateral acceleration and an instantaneous driving speed using a stored weighting algorithm which describes a relationship between the driving speed and a sensed lateral acceleration sensed by the sitting person.

14. The vehicle seat according to claim 13, wherein the control unit generates a supplementary control variable, which determines a basic measure of adaptation, from a driving style of a vehicle driver, which it classifies by using characteristic variables.

15. The vehicle seat according to claim 13, wherein a first characteristic curve which describes a logical linking of sensed lateral acceleration and a degree of side support on one side of the seat which is determined as desirable for said lateral acceleration is stored in the control unit, and wherein the control unit reads the control variable from the first characteristic curve by reference to the sensed lateral acceleration which has been determined.

16. The vehicle seat according to claim 14, wherein a first characteristic curve which describes a logical linking of sensed lateral acceleration and a degree of side support on one side of the seat which is determined as desirable for said lateral acceleration is stored in the control unit, and wherein the control unit reads the control variable from the first characteristic curve by reference to the sensed lateral acceleration which has been determined.

17. The vehicle seat according to claim 14, wherein a second characteristic curve which describes a logical linking of standardized driving styles and a degree of side support on both sides of the seat which is determined as desirable for said driving styles is stored in the control unit, and wherein the control unit outputs the supplementary control variable from the second characteristic curve by reference to the classified driving style.

18. The vehicle seat according to claim 15, wherein a second characteristic curve which describes a logical linking of standardized driving styles and a degree of side support on both sides of the seat which is determined as desirable for said driving styles is stored in the control unit, and wherein the control unit outputs the supplementary control variable from the second characteristic curve by reference to the classified driving style.

19. The vehicle seat according to claim 13, wherein the adjustable side support system comprises:

air cushions integrated in lateral bulges of the seat component and/or the backrest in order to provide side support; and

a compressed air regulating device for adjusting the air pressure of the air cushions, wherein the control variable and supplementary control variable are fed as electrical control signals to the compressed air regulating device, and wherein the compressed air regulating device applies a pressure value, corresponding to the supplementary control variable, in all the air cushions, and a pressure value, corresponding to the control variable, exclusively to the air cushions which lie on the outside of the seat during cornering.

20. The vehicle seat according to claim 19, wherein the compressed air regulating device includes a pressure controller, a compressed air pump and a compressed air accumulator, the pressure controller providing an excess pressure which adjusts pressure in the air cushions via a solenoid block.

21. The vehicle seat according to claim 20, wherein the electrical control signals, which represent the control variable and supplementary control variable, of the control unit are present at the solenoid valve block which is designed to inflate and vent the air cushions and to maintain pressure.