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1. US5619413 - Vehicle suspension comprising an actuator connected between a vehicle body and wheel in which control of the actuator is dependent on hydraulic fluid pressure

Office
États-Unis d'Amérique
Numéro de la demande 08360796
Date de la demande 02.05.1995
Numéro de publication 5619413
Date de publication 08.04.1997
Numéro de délivrance 5619413
Date de délivrance 08.04.1997
Type de publication A
CIB
B60G 17/015
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
60VÉHICULES EN GÉNÉRAL
GSUSPENSION DES VÉHICULES
17Suspensions élastiques permettant d'ajuster les caractéristiques des ressorts ou des amortisseurs de vibrations, de réguler la distance entre la surface porteuse et la partie suspendue du véhicule ou de bloquer la suspension pendant l'utilisation pour s'adapter aux conditions variables du véhicule ou du terrain, p.ex. en fonction de la vitesse ou de la charge
015les moyens de régulation comportant des éléments électriques ou électroniques
B60G 17/017
BTECHNIQUES INDUSTRIELLES; TRANSPORTS
60VÉHICULES EN GÉNÉRAL
GSUSPENSION DES VÉHICULES
17Suspensions élastiques permettant d'ajuster les caractéristiques des ressorts ou des amortisseurs de vibrations, de réguler la distance entre la surface porteuse et la partie suspendue du véhicule ou de bloquer la suspension pendant l'utilisation pour s'adapter aux conditions variables du véhicule ou du terrain, p.ex. en fonction de la vitesse ou de la charge
015les moyens de régulation comportant des éléments électriques ou électroniques
017caractérisés par leur utilisation lorsque le véhicule est arrêté, p.ex. lors du chargement, du démarrage ou de l'arrêt du moteur
CPC
B60G 17/017
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
17Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
015the regulating means comprising electric or electronic elements
017characterised by their use when the vehicle is stationary, e.g. during loading, engine start-up or switch-off
B60G 2202/413
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
2202Indexing codes relating to the type of spring, damper or actuator
40Type of actuator
41Fluid actuator
413Hydraulic actuator
B60G 2400/102
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
2400Indexing codes relating to detected, measured or calculated conditions or factors
10Acceleration; Deceleration
102vertical
B60G 2400/104
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
2400Indexing codes relating to detected, measured or calculated conditions or factors
10Acceleration; Deceleration
104lateral or transversal with regard to vehicle
B60G 2400/106
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
2400Indexing codes relating to detected, measured or calculated conditions or factors
10Acceleration; Deceleration
106longitudinal with regard to vehicle, e.g. braking
B60G 2400/204
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
GVEHICLE SUSPENSION ARRANGEMENTS
2400Indexing codes relating to detected, measured or calculated conditions or factors
20Speed
204Vehicle speed
Déposants Lotus Cars Limited
Inventeurs Oakley Robin N.
Mandataires Westman, Champlin & Kelly, P.A.
Données relatives à la priorité 9214543 08.07.1992 GB
Titre
(EN) Vehicle suspension comprising an actuator connected between a vehicle body and wheel in which control of the actuator is dependent on hydraulic fluid pressure
Abrégé
(EN)

The present invention provides, with reference to the figure, a vehicle suspension system comprising an actuator (10) connected between the body (17) of a vehicle and a wheel and hub assembly (18) of the vehicle. A source of pressurized fluid (20) and an exhaust for fluid (24) are provided along with a valve (22) for controlling flow of fluid to the actuator (10) from the source of pressurized fluid (20) and/or from the actuator (10) to the exhaust for fluid (24). A sensor (27, 28, 30, 31, 32, 33, 34, 35, 41) is used to generate signals of sensed variable vehicle parameters. A control system for the vehicle suspension system is used which has a processor (25, 20) which processes the signals generated by the sensor (27, 28, 30, 31, 32, 33, 34, 35, 41). The processor (25, 26) outputs a control signal to the valve (22) and thereby controls the actuator (10). The processor in normal operating conditions uses a first set of preprogrammed constants (e.g. control loop gains, integrating factors, desired ride heights) in algorithms used by the processor to calculate the control signal outputted thereby. The processor uses a different set of preprogrammed constants in the algorithms for a chosen time period following activation of the system and/or at low vehicle speeds and/or a low pressure of fluid supplied by the source of pressurized fluid (20).


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