F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 9/10 (2006.01) B62D 5/08 (2006.01)
Patent
CA 2247260
A power steering control valve (22) includes inner and outer valve members (40, 42) rotatable relative to each other. A force transmitting assembly (114) transmits a force which resists relative rotation between the valve members. A pressure chamber (138) is connected in fluid communication with a pump (24) and controls operation of the force transmitting assembly (114). The pump (24) supplies fluid at a relatively high flow rate during operation of the pump at a low speed and supplies fluid at a relatively low flow rate during operation of the pump at a relatively high speed. A secondary valve assembly (170) is in fluid communication with the pressure chamber (138) and defines an orifice (182 or 184) through which pressure is vented from the pressure chamber. The secondary valve assembly (170) is operated in response to relative rotation between the inner and outer valve members.
Une soupape de commande (22) pour direction assistée comprend un élément soupape interne et un élément soupape externe (40, 42) pouvant tourner l'un autour de l'autre. Un ensemble de transmission de force (114) transmet une force qui résiste à la rotation relative des éléments soupapes. Une chambre de pression (138), en communication fluidique avec une pompe (24), commande le fonctionnement de l'ensemble de transmission de force (114). La pompe (24) amène le fluide avec un débit relativement fort durant le fonctionnement de la pompe à une vitesse faible et à un débit relativement faible durant le fonctionnement de la pompe à une vitesse relativement élevée. Un ensemble soupape secondaire (170), en communication fluidique avec la chambre de pression (138), définit un orifice (182 ou 184) par lequel la pression est évacuée depuis la chambre de pression. L'ensemble soupape secondaire (170) fonctionne en réponse à la rotation relative des éléments soupapes interne et externe.
Fetherstonhaugh & Co.
Trw Inc.
LandOfFree
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