{
  "$type": "site.standard.document",
  "description": "An apparatus and method control a negative pressure in an internal combustion engine (10) equipped with a brake booster (18) that uses a negative pressure produced on a downstream side of a throttle valve (36) provided in an intake passage (34) of the engine, as a power source for amplifying the…",
  "path": "/patents/1084722",
  "publishedAt": "2004-08-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T13/52",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "An apparatus and method control a negative pressure in an internal combustion engine (10) equipped with a brake booster (18) that uses a negative pressure produced on a downstream side of a throttle valve (36) provided in an intake passage (34) of the engine, as a power source for amplifying the pedal pressing force. A controller (12) of the apparatus or method determines whether a negative pressure applied to the brake booster has reached a predetermined level when the internal combustion engine is started, and, if the negative pressure has not reached the predetermined level, increases an operating speed of the engine to a predetermined high speed and then keeps the throttle valve in a small opening state in which an opening amount of the throttle valve is smaller than that established when the internal combustion engine is in a fast idle state, during a period of time in which the engine proceeds to a steady-state operating mode.",
  "title": "Negative pressure control apparatus and method therefore in an internal combustion engine"
}