Suspension system for a car

Claim 2

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including means for varying the flow cross section at least in said one conduit means at the high frequency between a closed condition and a fully open condition so that the suspension system operates as an undampened spring when said one conduit means is open, and as a rigid coupling when said one conduit means is closed whereby oscillations are suppressed.

Claim 3

Suspension system as claimed in claim 1 comprising A connecting conduit connecting the other conduit means of said first and second conduit means with said one conduit means; and wherein said regulating apparatus includes regulating valve means having a first variable throttle located in said connecting conduit; and a second variable throttle in said one conduit means.

Claim 4

Suspension system as claimed in claim 2 wherein said regulating valve means include a valve slide for simultaneously varying said first and second variable throttles.

Claim 5

Suspension system as claimed in claim 1 wherein said regulating apparatus includes regulating valve means, and electric operating means for varying said flow cross section.

Claim 6

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding pressure of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented; at least one additional conduit connecting said additional source with said first conduit means; and a valve in said additional conduit having a first position for supplying pressure fluid to said first conduit means, and a second position for discharging pressure fluid from said first conduit and chamber.

Claim 7

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding pressure of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented; at least one additional conduit connecting said additional source with said first conduit means; and a valve in said additional conduit having a first position for supplying pressure fluid to said first conduit means, and a second position for discharging pressure fluid from said first conduit and chamber.

Claim 8

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means, and electric operating means for varying said flow cross section at least in said one conduit means at the high frequency between a closed position and a fully open conduit so that the suspension system operates as an undampened spring when said one conduit is opened, and as a rigid coupling when said one conduit means is closed; at least additional source of pressure fluid; at least one additional conduit connecting said additional source with said said first conduit means; and a valve in said additional conduit having a first position for supplying pressure fluid to said conduit means, and a second position for discharging pressure fluid from said first conduit and chamber.

Claim 9

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means, and electric operating means for varying said flow cross section at least in said one conduit means at the high frequency between a closed position and a fully open conduit so that the suspension system operates as an undampened spring when said one conduit is opened, and as a rigid coupling when said one conduit means is closed; at least additional source of pressure fluid; at least one additional conduit connecting said additional source with said said first conduit means; and a valve in said additional conduit having a first position for supplying pressure fluid to said conduit means, and a second position for discharging pressure fluid from said first conduit and chamber.

Claim 10

Suspension system as claimed in claim 6 including electric operating means for controlling said valve to open and close at a high frequency for varying the distance between said first and second masses; and wherein said frequency is between 1 and 1,000 Hertz.

Claim 11

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and secoNd chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means, and electric operating means for varying said flow cross section at least in said one conduit means at a high frequency between a closed condition and a fully open condition so that the suspension system operates as an undampened spring when said one conduit means is opened, and as a rigid coupling when said one conduit means is closed, said electric operating means including control means actuated by movement of at least one of said first and second masses to generate control signals; and electromagnetic means receiving said signal and responsing to the same to move said regulating valve means at said high frequency.

Claim 12

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and secoNd chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means, and electric operating means for varying said flow cross section at least in said one conduit means at a high frequency between a closed condition and a fully open condition so that the suspension system operates as an undampened spring when said one conduit means is opened, and as a rigid coupling when said one conduit means is closed, said electric operating means including control means actuated by movement of at least one of said first and second masses to generate control signals; and electromagnetic means receiving said signal and responsing to the same to move said regulating valve means at said high frequency.

Claim 13

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means including first and second throttle passages, a valve slide for simultaneously varying the flow cross sections of said first and second throttle passages, electromagnetic means for moving said valve slide, and control means for energizing said electromagnetic means at a frequency between 1 and 1000 Hertz and being responsive to movement of at least one of said first and second masses relative to a fixed point of the surrounding thereof.

Claim 14

Suspension system for a car having relatively movable first and second masses, comprising cylinder and piston means connecting said first and second masses and including a cylinder connected with one of said masses and a piston connected with the other one of said masses and dividing said cylinder into first and second chambers; first and second sources of pressure fluid; first and second conduit means connecting said first and second sources with said first and second chambers, respectively; regulating apparatus in at least one of said first and second conduits for varying the flow cross section in the same so as to adjust the yielding resistance of said cylinder and said piston against relative movement of said first and second masses until resonance oscillations of the same are prevented, said regulating apparatus including regulating valve means including first and second throttle passages, a valve slide for simultaneously varying the flow cross sections of said first and second throttle passages, electromagnetic means for moving said valve slide, and control means for energizing said electromagnetic means at a frequency between 1 and 1000 Hertz and being responsive to movement of at least one of said first and second masses relative to a fixed point of the surrounding thereof.

Claim 15

Suspension system as claimed in claim 9 comprising an auxiliary pump; an additional conduit connecting said pump with said first conduit means downstream of said regulating valve means, and a valve in said additional conduit and having a first position for supplying pressure fluid to said first conduit means and through the same to said first chamber, and a second position for discharging fluid from said first chamber.

Claim 16

Suspension system as claimed in claim 10 comprising another auxiliary pump, an other additional conduit connecting said pump with said second conduit means, and an other valve in said other additional conduit having a first position for supplying pressure fluid to said second conduit means and to said second chamber, and a second position for discharging fluid from said second conduit and second chamber.