{
  "$type": "site.standard.document",
  "description": "Vehicle suspension device, ensuring control of vertical travel between a suspended mass and an unsprung mass, comprising an elastic linkage (1) mounted between the suspended mass and the unsprung mass, said elastic linkage (1) comprising a spring (4) and comprising a reversible electric actuator…",
  "path": "/patents/1105233",
  "publishedAt": "2002-04-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60G17/0157",
    "CONCEPTION & DEV MICHELIN SA [CH]"
  ],
  "textContent": "Vehicle suspension device, ensuring control of vertical travel between a suspended mass and an unsprung mass, comprising an elastic linkage (1) mounted between the suspended mass and the unsprung mass, said elastic linkage (1) comprising a spring (4) and comprising a reversible electric actuator (5), acting in parallel with the spring (4) to control the movements of relative travel between suspended mass and unsprung mass, Zcr being the distance between the suspended mass and the unsprung mass, said device comprising means for controlling the electric actuator so that, from an observed variation of the distance Zcr between the suspended mass and the unsprung mass, due to a travel of the elastic linkage, the electric actuator develops a force F having a mass compensation component F1 = Ca.Mr.Acr oriented as the acceleration Acr of the travel of the unsprung mass relative to the suspended mass, with Mr being the unsprung mass and Ca being a coefficient, and having a damping component F2 = -Cv.Vcr opposing the velocity Vcr of said travel, Cv being a coefficient.",
  "title": "Suspension device with an electric actuator and a spring in parallel"
}