US 12,168,378 B2
Accumulator check systems and methods
Nandish Calchand, Leuven (BE); Bert Vandersmissen, Lovenjoel (BE); Stein Slootmaekers, Wellen (BE); Peter Boon, Merchtem (BE); Monzer Al Sakka, Sint-Truiden (BE); and Kylian Praet, Antwerp (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. 17/499,650.
Prior Publication US 2023/0110337 A1, Apr. 13, 2023
Int. Cl. B60G 17/0185 (2006.01); B60G 13/14 (2006.01)
CPC B60G 17/0185 (2013.01) [B60G 13/14 (2013.01); B60G 2202/416 (2013.01); B60G 2400/51 (2013.01); B60G 2600/08 (2013.01); B60G 2600/60 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An accumulator checking system for a suspension system of a vehicle, the accumulator checking system comprising:
a state module configured to selectively set a present state of an accumulator check for the suspension system to a first state;
a valve control module configured to determine first target open and closed states for valves of the suspension system based on the present state being set to the first state and to open and close the valves of the suspension system according to the first target open and closed states, respectively;
a pump control module configured to, when the valves are in the first target open and closed states, respectively, selectively operate an electric pump of the suspension system in a first direction and increase a pressure of hydraulic fluid in a first portion of the suspension system including an accumulator,
wherein the valve control module is configured to selectively open one or more of the valves to decrease the pressure in the first portion after the increase; and
a diagnosis module configured to:
selectively record the pressure in the first portion based on a second derivative of the pressure while the pressure is decreasing; and
selectively diagnose a fault in the accumulator based on the recorded pressure.