Processing

Please wait...

PATENTSCOPE will be unavailable a few hours for maintenance reason on Saturday 31.10.2020 at 7:00 AM CET
Settings

Settings

Goto Application

1. WO1990013466 - LOAD RESPONSIVE FLOW AMPLIFIED CONTROL SYSTEM

Publication Number WO/1990/013466
Publication Date 15.11.1990
International Application No. PCT/US1989/003430
International Filing Date 11.08.1989
IPC
B62D 5/09 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
09characterised by means for actuating valves
CPC
B62D 5/09
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
06fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
09characterised by means for actuating valves
Y10T 137/2554
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
2496Self-proportioning or correlating systems
2544Supply and exhaust type
2554Reversing or 4-way valve systems
Y10T 137/87169
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
87169Supply and exhaust
Applicants
  • CATERPILLAR INC. [US]/[US]
Inventors
  • ST. GERMAIN, Gene, R.
  • WAGGONER, John, B.
Agents
  • GRANT, John, W.
Priority Data
346,96503.05.1989US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LOAD RESPONSIVE FLOW AMPLIFIED CONTROL SYSTEM
(FR) SYSTEME DE COMMANDE A AMPLIFICATION DU DEBIT EN FONCTION DE LA CHARGE
Abstract
(EN)
Pilot operated steering system with load-responsive flow amplified control system includes a directional control valve (19) movable to an operating position to direct fluid from an operating fluid circuit (16) through a variable orifice (75) to a steering motor (11) and to direct control fluid from a control circuit (17) through another variable orifice (74) to combine with steering motor fluid. Control fluid moves directional control valve (19) to an operating position. Pressure compensation creates a predetermined pressure differential across variable orifice (74). The steering control valve (24) controls the position of the directional control valve (19). Pump displacement (14) responds to pressure in control circuit (17) to establish a constant pressure differential between pump (14) and steering motor (11) load pressure. Relative size of the variable orifices determines the flow amplification ratio between the pilot control circuit and the power operating circuit.
(FR)
Un système de direction actionné par un circuit pilote doté d'un système de commande à amplification du débit en fonction de la charge comprend une vanne de commande directionnelle (19) mobile jusqu'à une position de marche, afin de diriger du fluide provenant d'un circuit de fluide de commande (16), par un orifice variable (75), jusqu'à un moteur de direction (11) et afin de diriger du fluide de commande à partir d'un circuit de commande (17) par un autre orifice variable (74), afin de le combiner avec le fluide du moteur de direction. Le fluide de commande déplace ladite vanne de commande directionnelle (19) jusqu'à une position de marche. Une compensation de pression crée un différentiel de pression prédéterminée dans ledit orifice variable (74). Ladite vanne de commande de direction (24) régule la position de ladite vanne de commande directionnelle (19). Le déplacement de la pompe (14) réagit à la pression exercée dans le circuit de commande (17), afin d'établir un différentiel de pression constant entre la pression de charge de la pompe (14) et du moteur de direction (11). La taille relative des orifices variables détermine le rapport d'amplification de débit entre le circuit de commande de pilotage et le circuit de commande de puissance.
Also published as
Latest bibliographic data on file with the International Bureau