US 12,083,848 B1
Single axle roll control system with dual impeller pump arrangement
Miguel Dhaens, Lommel (BE); and Monzer Al Sakka, Sint-Truiden (BE)
Assigned to DRiV Automotive Inc., Northville, MI (US)
Filed by DRiV Automotive Inc., Northville, MI (US)
Filed on May 15, 2023, as Appl. No. 18/197,142.
Int. Cl. B60G 17/08 (2006.01); B60G 13/08 (2006.01); F15B 1/04 (2006.01); F15B 13/06 (2006.01)
CPC B60G 17/08 (2013.01) [B60G 13/08 (2013.01); F15B 1/04 (2013.01); F15B 13/06 (2013.01); B60G 2202/24 (2013.01); B60G 2204/62 (2013.01); B60G 2500/104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A single axle suspension system, comprising:
right and left dampers each including a damper housing, a piston rod, and a piston that is mounted on the piston rod and arranged in sliding engagement inside the damper housing such that the piston divides the damper housing into first and second working chambers;
first and second hydraulic circuits extending between and interconnecting the working chambers of the right and left dampers;
at least one pressurizing mechanism including a variable volume chamber that is connected in fluid communication with at least one of the first and second hydraulic circuits and a driven piston that is moveable in first and second directions to increase and decrease the volume of the variable volume chamber and therefore increase and decrease static pressure within at least one of the first and second hydraulic circuits independent of damper movements; and
a bi-directional pump with a first pumping mechanism that is arranged in fluid communication with the first hydraulic circuit, a second pumping mechanism that is arranged in fluid communication with the second hydraulic circuit, wherein the first pumping mechanism is configured to pump the hydraulic fluid through the first hydraulic circuit from the right damper to the left damper and the second pumping mechanism is configured to simultaneously pump the hydraulic fluid through the second hydraulic circuit from the left damper to the right damper in a first roll control operating mode, and wherein the first pumping mechanism is configured to pump the hydraulic fluid through the first hydraulic circuit from the left damper to the right damper and the second pumping mechanism is configured to simultaneously pump the hydraulic fluid through the second hydraulic circuit from the right damper to the left damper in a second roll control operating mode.