Methods and systems for dynamic weight management
AssigneeTransportation IP Holdings, LLC
InventorsJingjun Zhang, Bret D. Worden, Ibrahim Kacar, John Frederick
Life of this patent
Estimating the term…
Abstract
Systems and methods for reducing slack in a linkage chain of a vehicle truck assembly is provided. In one example, a method includes compressing a vehicle suspension by actuating an actuator with a cylinder abutted to a piston rod, the piston rod coupled to the vehicle suspension and, when deactivating the actuator, maintaining at least nominal compression on the vehicle suspension with the piston rod spaced away from a piston of the cylinder via a biasing member, the piston configured to slide within the cylinder along a central axis of the cylinder.
Claims18
A method for weight transfer of a vehicle axle, comprising:
- compressing a vehicle suspension by actuating a pneumatic actuator comprising an outer housing with a cylinder abutted to a piston rod coupled to the vehicle suspension;
- adjusting a position of the pneumatic actuator to a first position;
- wherein, in the first position, a piston contacts a front wall of the outer housing of the pneumatic actuator and the piston rod is spaced away from the piston by a first distance and protrudes from a rear side of the outer housing of the pneumatic actuator by the first distance;
- deactivating the pneumatic actuator;
- and
- when deactivating the pneumatic actuator, maintaining at least nominal compression on the vehicle suspension with the piston rod spaced away from the piston of the cylinder via a biasing member, the piston configured to slide within the cylinder along a central axis of the cylinder.
A weight transfer system for a vehicle, comprising;
- a vehicle suspension coupled to an axle of the vehicle;
- a pneumatic actuator comprising an outer housing having a cylinder piston abutted to a piston rod and configured to adjust the vehicle suspension based on a pressure in the pneumatic actuator, the piston rod coupled to the vehicle suspension through a linkage arrangement;
- and
- a spring member arranged in the cylinder piston and configured to exert a force on the piston rod along a central axis of the cylinder piston in a direction opposing a sliding of the piston rod when the vehicle suspension is decompressed;
- wherein the piston rod is in contact with the cylinder piston when the pneumatic actuator is pressurized to compress the vehicle suspension and at ambient pressure, the cylinder piston is in contact with a front wall of the outer housing of the pneumatic actuator and the piston rod is spaced away from the cylinder piston by a first distance and protrudes from a rear side of the outer housing of the pneumatic actuator by the first distance.
A vehicle suspension system, comprising:
- a lift mechanism including a crank coupled to a chain, the chain extending between a truck and a carrier of the lift mechanism;
- and
- a pneumatic actuator configured to adjust the lift mechanism by rotating the crank, the pneumatic actuator including:
- a piston coupled to a piston tube, both the piston and the piston tube enclosed by an outer housing of the pneumatic actuator;
- a rod extending along a central axis of the pneumatic actuator, a first portion of the rod enclosed by the piston tube and a second portion of the rod protruding from the piston tube and coupled to the crank;
- and
- a spring enclosed by the piston tube and coiling around the rod, the spring extending between a first end abutting a first spring seat fixedly attached to the rod and a second end abutting a second spring seat fixedly attached to the piston tube;
- wherein the pneumatic actuator is configured to be in a first position when the pneumatic actuator is at ambient pressure and wherein in the first position, the piston contacts a front wall of the outer housing of the pneumatic actuator and the rod is spaced away from the piston by a first distance and protrudes from a rear side of the outer housing of the pneumatic actuator by the first distance.
Dependencies are inferred from the claim text.