US 12,291,073 B2
Vehicle suspension system with multiple modes of operation
Monzer Al Sakka, Sint-Truiden (BE); and Miguel Dhaens, Lommel (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. 18/197,288.
Prior Publication US 2024/0383303 A1, Nov. 21, 2024
Int. Cl. B60G 13/08 (2006.01); B60G 17/08 (2006.01)
CPC B60G 17/08 (2013.01) [B60G 13/08 (2013.01); B60G 2202/24 (2013.01); B60G 2400/5182 (2013.01); B60G 2500/114 (2013.01); B60G 2800/012 (2013.01); B60G 2800/014 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A suspension system, comprising:
a front left damper including a first compression chamber and a first rebound chamber;
a front right damper including a second compression chamber and a second rebound chamber;
a back left damper including a third compression chamber and a third rebound chamber;
a back right damper including a fourth compression chamber and a fourth rebound chamber;
a first hydraulic circuit that fluidly connects said first compression chamber of said front left damper and said fourth rebound chamber of said back right damper;
a second hydraulic circuit that fluidly connects said first rebound chamber of said front left damper and said fourth compression chamber of said back right damper;
a third hydraulic circuit that fluidly connects said second compression chamber of said front right damper and said third rebound chamber of said back left damper;
a fourth hydraulic circuit that fluidly connects said second rebound chamber of said front right damper and said third compression chamber of said back left damper;
a first bi-directional pump that is fluidly connected to and arranged between said first and second hydraulic circuits, said first bi-directional pump having a first operating mode for pumping hydraulic fluid in a first direction from said first hydraulic circuit to said second hydraulic circuit and a second operating mode for pumping hydraulic fluid in a second direction from said second hydraulic circuit to said first hydraulic circuit; and
a second bi-directional pump that is fluidly connected to and arranged between said third and fourth hydraulic circuits, said second bi-directional pump having a third operating mode for pumping hydraulic fluid in a third direction from said third hydraulic circuit to said fourth hydraulic circuit and a fourth operating mode for pumping hydraulic fluid in a fourth direction from said fourth hydraulic circuit to said third hydraulic circuit, wherein said first bi-directional pump includes a first port that is configured as an inlet in said first operating mode and an outlet in said second operating mode, wherein said first bi-directional pump includes a second port that is configured as an outlet in said first operating mode and an inlet in said second operating mode, wherein said second bi-directional pump includes a third port that is configured as an inlet in said third operating mode and an outlet in said fourth operating mode, and wherein said second bi-directional pump includes a fourth port that is configured as an outlet in said third operating mode and an inlet in said fourth operating mode, wherein said first hydraulic circuit includes a first hydraulic line that extends between and fluidly connects said first compression chamber of said front left damper and said fourth rebound chamber of said back right damper and a first pump line that extends between and fluidly connects said first hydraulic line and said first port of said first bi-directional pump, wherein said second hydraulic circuit includes a second hydraulic line that extends between and fluidly connects said first rebound chamber of said front left damper and said fourth compression chamber of said back right damper and a second pump line that extends between and fluidly connects said second hydraulic line and said second port of said first bi-directional pump, wherein said third hydraulic circuit includes a third hydraulic line that extends between and fluidly connects said second compression chamber of said front right damper and said third rebound chamber of said back left damper and a third pump line that extends between and fluidly connects said third hydraulic line and said third port of said second bi-directional pump, and wherein said fourth hydraulic circuit includes a fourth hydraulic line that extends between and fluidly connects said second rebound chamber of said front right damper and said third compression chamber of said back left damper and a fourth pump line that extends between and fluidly connects said fourth hydraulic line and said fourth port of said second bi-directional pump, the suspension system further comprising:
a first pump shut-off valve positioned in said first pump line, the first pump shut-off valve being a two position electro-mechanical valve with a fully open position and a fully closed position; and
a second pump shut-off valve positioned in said second pump line, the second pump shut-off valve being a two position electro-mechanical valve with a fully open position and a fully closed position.