{
  "$type": "site.standard.document",
  "description": "An injector drive circuit (200) including: a step-up circuit (100) generating a high voltage from a power supply; a first switching device connected to a path between the step-up circuit (100) and an injector (3); a second switching device connected to the power supply; a third switching device…",
  "path": "/patents/998907",
  "publishedAt": "2012-08-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/20",
    "HITACHI AUTOMOTIVE SYSTEMS LTD [JP]"
  ],
  "textContent": "An injector drive circuit (200) including: a step-up circuit (100) generating a high voltage from a power supply; a first switching device connected to a path between the step-up circuit (100) and an injector (3); a second switching device connected to the power supply; a third switching device connected between the injector (3) and the ground; and a control unit operating the first, second and third switching device according to a value of current flowing through the injector (3); wherein the control unit has a unit turning on and off the second switching device in a period during which it turns on and off the first switching device a plurality of times; wherein the control unit has, as set values to control the current flowing through the injector (3), a first threshold defining a lower current limit, a second threshold defining an upper current limit and a third threshold, larger than the second threshold.",
  "title": "Injector drive circuit"
}