Fluid pressure type active suspension

Abstract

Abstract PURPOSE:To reduce the consumption of working fluid during running particularly on a bad road by providing a variable orifice in a feed-back passage communicated with a pressure control means for controlling the feed and discharge of working fluid to and from a fluid pressure actuator, and by controlling the opening degree of the variable orifice in accordance with a degree of the condition of a load. CONSTITUTION:Pressure control valves 32, 34 are disposed respectively in high pressure fluid passages 18FR, 18FL, which are communicated with a high pressure passage 18 connected to the discharge side of a pump 6 and which are connected to fluid chambers 2FR, 2FL in hydraulic actuators 1FR, 1FL proved respectively at wheels. Further, a control valve 40 for introducing a pressure in a fluid passage 50 between a fixed orifice 42 and a variable orifice 54 and pressure in a connecting passage 56, as pressures, respectively through pilot 50a, 56a is disposed in the pressure control valve 32 (also 34). In this case, a variable orifice 250 is disposed in the pilot passage 56a, and the degree of the orifice is controlled so as to be increased when a road is determined to be bad during running thereon.

Inventors

• 👤 Takashi Yonekawa
• 👤 米川　隆
• 👤 Shuichi Takema
• 👤 修一 武馬
• 👤 Toshio Yuya
• 👤 油谷　敏男
• 👤 Toshio Onuma
• 👤 敏男 大沼
• 👤 Tsukasa Watanabe
• 👤 司 渡辺
• 👤 Toshiaki Hamada
• 👤 敏明 浜田

Bibliographic Details