{
  "$type": "site.standard.document",
  "description": "In an intake air control device, a valve gear (6) for driving a shaft (3) of a throttle valve (1) is made of non-magnetic metal that does not interfere with a magnetic circuit constituted by split type permanent magnet (41) and yoke (42). Accordingly, as the magnetic flux from the magnetic circuit…",
  "path": "/patents/1099639",
  "publishedAt": "2002-12-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D11/10",
    "DENSO CORP [JP]"
  ],
  "textContent": "In an intake air control device, a valve gear (6) for driving a shaft (3) of a throttle valve (1) is made of non-magnetic metal that does not interfere with a magnetic circuit constituted by split type permanent magnet (41) and yoke (42). Accordingly, as the magnetic flux from the magnetic circuit is effectively used without leakage to the valve gear, an opening degree of the throttle valve is accurately detected by a non-contact type Hall element (43). Further, it is not necessary to reinforce with other metal a ring shaped fixing portion (25) of the valve gear that is rigidly fixed to an end of the shaft by staking or welding and an outer protrusion (27) of the valve gear that comes in hitting contact with a stopper (17) of a throttle body when the throttle valve is fully closed, resulting in less number of component parts and lower cost.",
  "title": "Intake air control device for an internal combustion engine"
}