{
  "$type": "site.standard.document",
  "description": "The automatic transmission has a hydraulic system to operate and control a hydrodynamic retarder (6) which has a retarder chamber (9) constructed between a rotor (7) and a stator (8). The filling level of the retarder chamber is variable depending upon a position of a hydraulic step-up device in…",
  "path": "/patents/1101714",
  "publishedAt": "2002-09-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T1/087",
    "ZAHNRADFABRIK FRIEDRICHSHAFEN [DE]"
  ],
  "textContent": "The automatic transmission has a hydraulic system to operate and control a hydrodynamic retarder (6) which has a retarder chamber (9) constructed between a rotor (7) and a stator (8). The filling level of the retarder chamber is variable depending upon a position of a hydraulic step-up device in communication with the retarder chamber. The hydraulic step-up device is formed by a stepped piston (10) which defines a first piston chamber (11) with a larger effective area and a second piston chamber (12) with a smaller effective area, with the first piston chamber connected to the retarder chamber.",
  "title": "Automatic transmission with hydraulic system"
}