US 12,280,625 B2
Vehicle with a curve tilting function
Andreas Unger, Gaimersheim (DE); Michael Jall, Pfaffenhofen a.d. Ilm (DE); Philipp Knuth, Munich (DE); Hanno Stingl, Kipfenberg (DE); and Tobias Templer, Hitzhofen (DE)
Assigned to Cariad SE, Wolfsburg (DE); and Audi AG, Ingolstadt (DE)
Filed by CARIAD SE, Wolfsburg (DE); and AUDI AG, Ingolstadt (DE)
Filed on Aug. 31, 2022, as Appl. No. 17/900,420.
Claims priority of application No. 10 2021 123 306.2 (DE), filed on Sep. 9, 2021.
Prior Publication US 2023/0073311 A1, Mar. 9, 2023
Int. Cl. B60G 17/016 (2006.01)
CPC B60G 17/0162 (2013.01) [B60G 2400/0511 (2013.01); B60G 2400/104 (2013.01); B60G 2600/604 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A vehicle having an active chassis system with a curve tilting function, the vehicle comprising:
a control unit that, in operation, when negotiating a curve, determines a vehicle tilting angle based on a current vehicle transverse acceleration or a correlated driving operation parameter, by which the current vehicle transverse acceleration can be reduced,
wherein the control unit uses the vehicle tilting angle to trigger actuators of a suspension/shock absorbing system in order to adjust the vehicle tilting angle,
wherein the curve tilting function incorporates a prediction unit which, in operation, provides curve negotiation data for an upcoming curve, and the vehicle tilting angle is set based on the curve negotiation data,
wherein the control unit is connected upstream in a signal flow direction to a low pass filter that, in operation, generates from the current vehicle transverse acceleration a modified transverse acceleration signal by signal filtering, and the control unit, in operation, determines the vehicle tilting angle using the modified transverse acceleration signal,
wherein a signal filter behavior of the low pass filter is based on a corner frequency of the low pass filter,
wherein a first corner frequency results in a smooth transverse acceleration signal with first signal noise and first latency, corresponding to a delay time resulting from the signal filtering, and/or a second corner frequency results in a transverse acceleration signal with second signal noise and second latency,
wherein the second corner frequency is greater than the first corner frequency,
wherein the second signal noise is greater than the first signal noise, and
wherein the first latency is greater than the second latency.