| 摘要 |
PROBLEM TO BE SOLVED: To improve the steering stability by suppressing the rolling of a car body without degrading the ride quality in a suspension of a car. SOLUTION: A pneumatic spring 13 and a hydraulic buffer 14 are fitted to right and left wheels, and a compressor 25 and an air tank 26 are connected to the pneumatic spring 13 via a supply and exhaust control valve 24. Pilot pipes 29 and 30 of the supply and exhaust control valve 24 are connected to a cylinder lower chamber 18b of the right and left hydraulic buffers 14. When the car travels straight, the right and left hydraulic buffers 14 are expanded/ contracted in the same phase, and no differential pressure is generated in the pilot pressure of the pilot pipes 29 and 30, and the supply and exhaust control valve 24 holds the air in the right and left pneumatic springs 13, and sufficiently absorbs the vibration. When the car makes a turn, the right and left hydraulic buffers 14 are expanded/contracted in the reverse phase, the differential pressure is generated between the right and left pilot pressures, the supply and exhaust control valve 24 is changed over, air is supplied to the pneumatic spring 13 on the contraction side from the compressor 25 and the pneumatic tank 26, and air in the pneumatic spring 13 on the expansion side is exhausted to suppress the rolling.
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