US 11,752,824 B2
High pressure gas spring controls for improved vehicle leveling
Deepak Shukla, Oshkosh, WI (US); David Hansen, Oshkosh, WI (US); and Ron Zhang, Oshkosh, WI (US)
Assigned to Oshkosh Defense, LLC, Oshkosh, WI (US)
Filed by Oshkosh Defense, LLC, Oshkosh, WI (US)
Filed on Jan. 4, 2021, as Appl. No. 17/140,939.
Application 17/140,939 is a continuation of application No. 15/957,319, filed on Apr. 19, 2018, granted, now 10,882,373.
Claims priority of provisional application 62/491,724, filed on Apr. 28, 2017.
Claims priority of provisional application 62/492,041, filed on Apr. 28, 2017.
Prior Publication US 2021/0122205 A1, Apr. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B60G 17/015 (2006.01); F16F 9/512 (2006.01); F16F 9/32 (2006.01); B60G 11/27 (2006.01); B60G 17/052 (2006.01); B60G 11/30 (2006.01); B60G 17/018 (2006.01); F16F 9/02 (2006.01)
CPC B60G 17/0155 (2013.01) [B60G 11/27 (2013.01); B60G 11/30 (2013.01); B60G 17/0182 (2013.01); B60G 17/052 (2013.01); F16F 9/0218 (2013.01); F16F 9/3292 (2013.01); F16F 9/512 (2013.01); B60G 2202/152 (2013.01); B60G 2206/42 (2013.01); B60G 2206/422 (2013.01); B60G 2400/51222 (2013.01); B60G 2400/60 (2013.01); B60G 2500/201 (2013.01); B60G 2500/30 (2013.01); B60G 2600/18 (2013.01); B60G 2800/70 (2013.01); F16F 2228/066 (2013.01); F16F 2230/08 (2013.01); F16F 2230/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A suspension system, comprising:
a spring assembly including:
a gas spring; and
an accumulator coupled to the gas spring and including a bladder, the accumulator having a compressed state and an uncompressed state;
at least one of (a) a first sensor arranged to detect a first pressure on a first side of the bladder and (b) a second sensor arranged to detect a second pressure on a second side of the bladder opposite the first side; and
a controller configured to:
determine an amount of gas in the spring assembly based on at least one of the first pressure and the second pressure;
determine a target amount of gas in the spring assembly; and
adjust the amount of gas in the spring assembly towards the target amount of gas based on a pressure difference across the bladder.