Patent ID: 7390002
Filing Date: 2008-06-24
Classification: B60G

Abstract:
1. A suspension system for use in a vehicle including a body, left and right front wheels, and left and right rear wheels, the system comprising: a front-wheel-associated cylinder device which controls a relative displacement between the left and right front wheels in upward and downward directions, and which includes a housing and a piston fitted in the housing to divide an inner room of the housing into a first fluid chamber and a second fluid chamber; a rear-wheel-associated cylinder device which controls a relative displacement between the left and right rear wheels in the upward and downward directions, and which includes a housing and a piston fitted in the housing to divide an inner room of the housing into a first fluid chamber and a second fluid chamber which correspond to the first and second fluid chambers of the front-wheel-associated cylinder device, respectively; a first-chamber-associated passage which connects between the respective first fluid chambers of the front-wheel-associated and rear-wheel-associated cylinder devices; a second-chamber-associated passage which connects between the respective second fluid chambers of the front-wheel-associated and rear-wheel-associated cylinder devices; at least one fluid accommodating device which is connected to the first-chamber-associated passage at a first connection point (CP a first-chamber-associated valve device which is selectively placed in a communication position to communicate the respective first fluid chambers of the front-wheel-associated and rear-wheel-associated cylinder devices, with each other, and a shut-off position to shut off the communication between said respective first fluid chambers; a second-chamber-associated valve device which is selectively placed in a communication position to communicate the respective second fluid chambers of the front-wheel-associated and rear-wheel-associated cylinder devices, with each other, and a shut-off position to shut off the communication between said respective second fluid chambers; and the first-chamber-associated valve device being provided in one of the two portions of the first-chamber-associated passage that is nearer than the other portion to a first cylinder device as one of the front-wheel-associated and rear-wheel-associated cylinder devices, the second-chamber-associated valve device being provided in one of the two portions of the second-chamber-associated passage that is nearer than the other portion to a second cylinder device as the other of the front-wheel-associated and rear-wheel-associated cylinder devices.