Method and system for controlling a chassis of a vehicle

Patent metadata

Field	Value
Publication number	US-12441152-B2
Application number	US-202418420155-A
Country	US
Kind code	B2
Filing date	Jan 23, 2024
Priority date	Jan 25, 2023
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A method for controlling a chassis of a vehicle includes the steps of: detecting a vertical wheel acceleration of a wheel of the vehicle, detecting a vertical body acceleration of a body of the vehicle, determining a crest-dip indication by comparing the vertical wheel acceleration and the vertical body acceleration, and controlling the chassis on the basis of the crest-dip indication. The crest-dip indication indicates whether or not the vehicle is currently driving over a crest (K) or a dip (S). A system for controlling a chassis of a vehicle includes a wheel acceleration sensor for detecting a vertical wheel acceleration of a wheel of the vehicle, a body acceleration sensor for detecting a vertical body acceleration of a body of the vehicle, and a control unit.

First claim

What is claimed is:

1. A method for controlling a chassis of a vehicle, said method comprising:
detecting a vertical wheel acceleration of a wheel of the vehicle,
detecting a vertical body acceleration of a body of the vehicle,
determining a crest-dip indication by comparing the vertical wheel acceleration and the vertical body acceleration, wherein the crest-dip indication specifies whether or not the vehicle is currently driving over a crest (K) or a dip(S),
determining crest-dip information on the basis of the vertical wheel acceleration and the vertical body acceleration, which crest-dip information comprises an indication of an extent of the crest (K) or dip(S) currently being driven over, and
controlling the chassis on the basis of the crest-dip indication and the crest-dip information.

2. The method according to claim 1 , wherein, in order to determine the crest-dip indication, a sign of the vertical wheel acceleration is compared to a sign of the vertical body acceleration.

3. The method according to claim 1 , wherein, in order to determine the crest-dip indication, the vertical wheel acceleration and the vertical body acceleration are each compared to a threshold value.

4. A method for controlling a chassis of a vehicle, said method comprising:
detecting a vertical wheel acceleration of a wheel of the vehicle,
detecting a vertical body acceleration of a body of the vehicle,
determining a crest-dip indication by comparing the vertical wheel acceleration and the vertical body acceleration, wherein the crest-dip indication specifies whether or not the vehicle is currently driving over a crest (K) or a dip(S), wherein, in order to determine the crest-dip indication, a progression of the vertical wheel acceleration is compared to a progression of the vertical body acceleration, and
controlling the chassis on the basis of the crest-dip indication.

5. The method according to claim 4 , further comprising performing a low pass filtering of the progression of the vertical wheel acceleration and the progression of the vertical body acceleration.

6. The method according to claim 1 , wherein in order to control the chassis, a progression of a compression speed of a spring-damper device of the vehicle is determined and, depending on the crest-dip indication and/or the crest-dip characteristic information, low-pass filtering of the progression of the compression speed is either performed or not performed.

7. The method according to claim 1 , wherein in order to control the chassis, a progression of a body speed of the body of the vehicle is determined and, depending on the crest-dip indication and/or the crest-dip characteristic information, high-pass filtering of the progression of the body speed is either performed or not performed.

8. The method according to claim 7 , wherein a corner frequency of low pass filtering of the progression of the compression speed is equal to a corner frequency of the high pass filtering of the progression of the body speed.

9. The method according to claim 1 , wherein the vertical wheel acceleration is detected at a wheel support associated with the respective wheel.

10. The method according to claim 1 , wherein the vertical body acceleration is detected on a damper strut dome associated with the wheel whose vertical wheel acceleration is detected.

11. The method according to claim 1 , wherein the vertical wheel acceleration of all four wheels of the vehicle is detected, and each vertical wheel acceleration is compared to a body acceleration in order to determine the crest-dip indication.

12. A method for controlling a chassis of a vehicle, said method comprising:
detecting a vertical wheel acceleration of a wheel of the vehicle,
detecting a vertical body acceleration of a body of the vehicle,
determining a crest-dip indication by comparing the vertical wheel acceleration and the vertical body acceleration, wherein the crest-dip indication specifies whether or not the vehicle is currently driving over a crest (K) or a dip(S), and
controlling the chassis on the basis of the crest-dip indication,
wherein the vertical wheel acceleration of all four wheels of the vehicle is detected, and each vertical wheel acceleration is compared to a body acceleration in order to determine the crest-dip indication,
wherein vertical wheel accelerations of the wheels of a front axle are compared with a first threshold in order to determine the crest-dip indication, and wheel accelerations of wheels of a rear axle are compared with a second threshold value that is not equal to the first threshold value.

13. A system for controlling a chassis of a vehicle, said system comprising:
(i) a wheel acceleration sensor for detecting a vertical wheel acceleration of a wheel of the vehicle,
(ii) a body acceleration sensor for detecting a vertical body acceleration of a body of the vehicle, and
(iii) a control unit configured to:
detect a vertical wheel acceleration of the wheel of the vehicle,
detect a vertical body acceleration of the body of the vehicle,
determine a crest-dip indication by comparing the vertical wheel acceleration and the vertical body acceleration, wherein the crest-dip indication specifies whether or not the vehicle is currently driving over a crest (K) or a dip(S),
determine crest-dip information on the basis of the vertical wheel acceleration and the vertical body acceleration, which crest-dip information comprises an indication of an extent of the crest (K) or dip(S) currently being driven over, and
control the chassis on the basis of the crest-dip indication and the crest-dip information.

14. A vehicle comprising the system of claim 13 .

Assignees

• Porsche Ag

Inventors

• Caredda David
• Liebold Jochen
• Eisenbarth Markus

Classifications

• B60G17/01908

  Acceleration or inclination sensors (characterised by the use of gyroscopes B60G21/08) · CPC title

• B60G2400/102

  vertical · CPC title

• B60G2500/10

  Damping action or damper · CPC title

• B60G2600/602

  high pass · CPC title

• B60G2600/604

  low pass · CPC title