| 摘要 |
PURPOSE:To improve the high-speed stability and straight advance stability by installing a pressure amplifier into a system for feedback-inputting the pressure supplied into a power unit into a reaction-force mechanism, thus obtaining always proper reaction force. CONSTITUTION:A hydraulic reaction-force type power steering apparatus supplies the discharge oil pressure P from a constant flow-rate discharge pump 81 into a power unit 82 through a pipe 87, and supplies a reaction-force pressure adjusting mechanism 83 from the pipe 87 through a branched pipe 88. In the mechanism 83, the oil pressure adjusted to alphaP is feedback-input into a reaction- force mechanisms 84, and the output of the power unit 82 is properly reduced, and steering feeling is improved. With such constitution, a reaction-force amplifier 11 is installed into a system 10 in which the supplied pressure into the power unit 82 is feedback-input into the reaction-force mechanism 84. The reaction-force amplifier 11 controls the discharge pressure of a constant flow- rate discharge pump 21 by controlling a pressure-correspondence type variable throttle valve 22 by the hydraulic pressure alphaP. |
