Suspension device having electric actuator and spring in parallel
First Claim
1. A vehicle suspension device for controlling the vertical deflection between a suspended mass and a non-suspended mass, comprising an elastic link mounted between the suspended mass and the non-suspended mass, the said elastic link including a spring and comprising a reversible electric actuator acting in parallel with the spring for controlling the relative-deflection movements between suspended mass and non-suspended mass, Zcr being the distance between a point on the suspended mass and a point on the non-suspended mass, the said device comprising means for controlling the electric actuator so that, from an observed variation of the distance Zcr, due to a deflection of the elastic link, the electric actuator develops a force F having a mass compensation component F1=Ca·
- Mr·
Acr oriented in the direction of the acceleration Acr of the deflection of the non-suspended mass with respect to the suspended mass, with Mr being the non-suspended mass and Ca a coefficient, and having a damping component F2=−
Cv·
Vcr opposing the speed Vcr of the said deflection, Cv being a coefficient.
1 Assignment
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Accused Products
Abstract
A vehicle suspension device for controlling the vertical deflection between a suspended mass and a non-suspended mass, including an elastic link mounted between the suspended mass and the non-suspended mass, the said elastic link embodying a spring, a reversible electric actuator acting in parallel with the spring for controlling the relative-deflection movements between suspended mass and non-suspended mass, Zcr being the distance between the suspended mass and the non-suspended mass, and means for controlling the electric actuator, from an observed variation of the distance Zcr between the suspended mass and the non-suspended mass due to a deflection of the elastic link, in order that the electric actuator develops a force F having a mass compensation component F1=Ca·Mr·Acr oriented like the acceleration Acr of the deflection of the non-suspended mass with respect to the suspended mass, with Mr being the non-suspended mass and Ca a coefficient, and having a damping component F2=−Cv·Vcr opposing the speed Vcr of the said deflection, Cv being a coefficient.
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Citations
18 Claims
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1. A vehicle suspension device for controlling the vertical deflection between a suspended mass and a non-suspended mass, comprising an elastic link mounted between the suspended mass and the non-suspended mass, the said elastic link including a spring and comprising a reversible electric actuator acting in parallel with the spring for controlling the relative-deflection movements between suspended mass and non-suspended mass, Zcr being the distance between a point on the suspended mass and a point on the non-suspended mass, the said device comprising means for controlling the electric actuator so that, from an observed variation of the distance Zcr, due to a deflection of the elastic link, the electric actuator develops a force F having a mass compensation component F1=Ca·
- Mr·
Acr oriented in the direction of the acceleration Acr of the deflection of the non-suspended mass with respect to the suspended mass, with Mr being the non-suspended mass and Ca a coefficient, and having a damping component F2=−
Cv·
Vcr opposing the speed Vcr of the said deflection, Cv being a coefficient. - View Dependent Claims (2, 3, 4, 5, 6)
- Mr·
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7. A device for the overall suspension of a vehicle comprising a suspended mass and at least one group of two suspension systems comprising a suspension device for controlling the vertical deflection between a suspended mass and a non-suspended mass, said device comprising an elastic link mounted between the suspended mass and the non-suspended mass, the said elastic link including a spring, a reversible electric actuator acting in parallel with the spring for controlling the relative-deflection movements between suspended mass and non-suspended mass, Zcr being the distance between a point on the suspended mass and a point on the non-suspended mass, means for controlling the electric actuator so that, from an observed variation of the distance Zcr, due to a deflection of the elastic link, the electric actuator develops a force F having a mass compensation component F1=Ca·
- Mr·
Acr oriented in the direction of the acceleration Acr of the deflection of the non-suspended mass with respect to the suspended mass, with Mr being the non-suspended mass and Ca a coefficient, and having a damping component F2=−
Cv·
Vcr opposing the speed Vcr of the said deflection, Cv being a coefficient, in which the electric actuators are controlled by the said control means so that they develop a force F additionally having a trim correction component F4, the said trim correction component applying a trim correction torque to the said body. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- Mr·
Specification