Land vehicles – Wheeled – Running gear
Patent
1988-08-29
1989-08-29
Rice, Kenneth R.
Land vehicles
Wheeled
Running gear
280707, B60G 1126
Patent
active
048610682
ABSTRACT:
A solenoid actuated control valve includes a valve member located in either of a first or a second position within a fluid flow passage in response to the energization or deenergization of a solenoid. In one of its positions, the valve establishes a minimum restriction to flow and in its other position establishes a maximum restriction to flow. The valve member is designed so that the fluid pressures to which it is exposed are essentially balanced in its direction of movement so that the valve may be rapidly shifted with a minimum power requirement. By controlling the solenoid energization by a pulse width modulated control signal, the flow restriction may be time averaged to any restriction intermediate the minimum and maximum restrictions. The valve is especially adapted for use in a vehicle suspension system to provide a variable damping characteristic for a shock absorber, for example, which may be varied in response to vehicle operating conditions monitored by an electronic processor which controls energization of the solenoid.
REFERENCES:
patent: 4624478 (1986-11-01), Ohtagaki et al.
patent: 4655440 (1987-04-01), Eckert
patent: 4702490 (1987-10-01), Yamaguchi et al.
patent: 4730816 (1988-03-01), Eckert
Colt Industries Inc.
Potoroka, Sr. Walter
Rice Kenneth R.
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