{
  "$type": "site.standard.document",
  "description": "A four-element, two-freedom-degree planetary gear mechanism is constructed by arraying four input/output elements of a sun gear S1, a ring gear R, a carrier C and a sun gear S2 in an alignment chart. One of the two elements R and C arrayed on the inner side is assigned to the input In from an…",
  "path": "/patents/1098665",
  "publishedAt": "2003-01-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K6/365",
    "NISSAN MOTOR [JP]"
  ],
  "textContent": "A four-element, two-freedom-degree planetary gear mechanism is constructed by arraying four input/output elements of a sun gear S1, a ring gear R, a carrier C and a sun gear S2 in an alignment chart. One of the two elements R and C arrayed on the inner side is assigned to the input In from an engine whereas the other is assigned to the output Out to the drive shaft, and the two outer elements S1 and S2 are connected to motor-generators MGi and MGo respectively. As a result, the torque supported by the motor-generators can be made lower than the engine output, and the energy passing through the motor-generators is made lower to improve the transmission efficiency of the drivetrain.",
  "title": "Hybrid drivetrain for a vehicle"
}