Land vehicles – Wheeled – Running gear
Patent
1989-11-07
1990-11-20
Bertsch, Richard A.
Land vehicles
Wheeled
Running gear
280709, B60G 1126
Patent
active
049713531
ABSTRACT:
In a hydraulic suspension system, a plurality of actuators having working fluid chambers are provided. Each actuator is adapted to increase and decrease vehicle height as the results of the supply and the discharge of working fluid into and from its working fluid chamber, respectively. A plurality of accumulators are connected with associated working fluid chambers. Working fluid supply passages supply working fluid into the working fluid chambers and working fluid discharge passages discharge working fluid from the working fluid chambers. Pressure control devices are provided in the supply passages and the discharge passages. Each pressure control device means is adapted to control the supply of the working fluid into and the discharge from the associated working fluid chamber to adjust the pressure within the chamber. The suspension system further comprises flow resistance control devices. Each flow resistance control devices is adapted to adjust at least one of the first flow resistance between the associated working fluid chamber and the associated accumulator and the second flow resistance of the associated discharge passage in response to the flow rate of the working fluid discharging through the discharge passage so that the higher the discharging flow rate is, the higher the ratio of the second to the first flow resistances may be, not only to reduce the flow rate of the working fluid discharging from the working fluid chamber through the discharge passage but also to increase the flow rate of the working fluid flowing into the accumulator from the working fluid chamber.
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Society of Automotive Engineers/Technical Paper Series No. 780050, titled: Active Ride Control--A Logical Step from Static Vehicle Attitude Control, Feb. 27-Mar. 3, 1978 and C239/84-title: The Application of Active Suspension to High Performance Road Vehicles--pp. 333-338.
Buma Shuuichi
Hattori Katsuhiko
Ikemoto Hiroyuki
Isogai Sigetaka
Komazawa Osamu
Aisin Seiki Kabushiki Kaisha
Bertsch Richard A.
Toyota Jidosha & Kabushiki Kaisha
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