Accumulator and vehicle suspension system including the same

A suspension system of a vehicle, the suspension system comprising:

• a damper comprising a first chamber, a second chamber, and a piston dividing between the first chamber and the second chamber;
• a pump for supplying pressurized oil to the damper;
• and
• an accumulator capable of supplying stored fluid to the damper,
• wherein the accumulator comprises:
• a body configured to store fluid;
• a variable portion disposed within the body to form a first space;
• a driver for varying a volume of the first space;
• a moving portion at least partially inserted in the accumulator and movable by the driver;
• a connecting portion disposed between the moving portion and the variable portion;
• and
• a stopper disposed within the first space to form a second space, wherein the stopper protrudes from a bottom of the body in a direction adjacent to a top of the body and having a communication hole formed to flow the fluid through between the first space and the second space,
• wherein the connecting portion has a concave portion configured to receive a part of the stopper where the communication hole of the stopper is formed.

A suspension system of a vehicle, the suspension system comprising:

• a damper comprising a first chamber, a second chamber, and a piston dividing between the first chamber and the second chamber;
• an accumulator capable of supplying stored fluid to the damper;
• an environmental detector configured to detect driving environment information of the vehicle;
• and
• a controller configured to supply the stored fluid to the first chamber or the second chamber by varying a volume of the accumulator based on the information detected by the environmental detector,
• wherein the accumulator comprises an adjustment module comprising:
• a body configured to store fluid;
• a variable portion within the body to form a first space;
• a driver for varying a volume of the first space within the variable portion and controlled by the controller;
• a moving portion at least partially disposed in the body and movable by the driver;
• a connecting portion disposed between the moving portion and the variable portion;
• and
• a stopper within the first space to maintain a minimum volume of the accumulator,
• wherein the stopper protrudes from a bottom of the body in a direction adjacent to a top of the body and having a communication hole formed to flow the fluid through between the first space and inside the of the stopper,
• wherein the connecting portion has a concave portion configured to receive a part of the stopper where the communication hole is formed.