US 11,938,772 B2
System for grading filling of a hydraulic suspension system
Bert Vandersmissen, Lovenjoel (BE); Nandish Calchand, Leuven (BE); Kylian Praet, Antwerp (BE); Stein Slootmaekers, Wellen (BE); and Peter Boon, Merchtem (BE)
Assigned to DRiV Automotive Inc., Northville, MI (US)
Filed by DRIV Automotive Inc., Southfield, MI (US)
Filed on Oct. 12, 2021, as Appl. No. 17/499,556.
Prior Publication US 2023/0113777 A1, Apr. 13, 2023
Int. Cl. B60G 17/015 (2006.01); B60G 17/019 (2006.01)
CPC B60G 17/0152 (2013.01) [B60G 17/019 (2013.01); B60G 2202/416 (2013.01); B60G 2400/5182 (2013.01); B60G 2500/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for grading filling of a suspension system with hydraulic fluid, the system comprising:
a pump control module configured to:
during a first period, operate an electric pump of the suspension system in a first direction and decrease hydraulic fluid pressure within the suspension system; and
during a second period, operate the electric pump of the suspension system in a second direction and increase hydraulic fluid pressure within the suspension system;
a monitoring module configured to:
store a first pressure of hydraulic fluid within the suspension system measured using a pressure sensor when the first pressure is less than or equal a first predetermined pressure while the pump is operated in the first direction; and
store a second pressure of hydraulic fluid within the suspension system measured using the pressure sensor when the second pressure is greater than or equal a second predetermined pressure while the pump is operated in the second direction; and
a grade module configured to determine a grade value for filling of the suspension system with hydraulic fluid based on the first pressure and the second pressure.