{
  "$type": "site.standard.document",
  "description": "An object to provide a vehicle including a single-cylinder four-stroke engine unit with which the purification performance of purifying the exhaust gas by a catalyst is improved and the initial performance of a vehicle regarding the exhaust purification is maintained for a longer time, while the…",
  "path": "/patents/926876",
  "publishedAt": "2017-05-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B61/02",
    "YAMAHA MOTOR CO LTD [JP]"
  ],
  "textContent": "An object to provide a vehicle including a single-cylinder four-stroke engine unit with which the purification performance of purifying the exhaust gas by a catalyst is improved and the initial performance of a vehicle regarding the exhaust purification is maintained for a longer time, while the supporting structure is simplified. The upstream end of a single-combustion-chamber main catalyst 39 is provided upstream of the upstream end of a single-combustion-chamber silencer 35 in the flow direction of exhaust gas. The single-combustion-chamber main catalyst 39 purifies the exhaust gas exhausted from one combustion chamber 29 most in the exhaust path extending from the one combustion chamber 29 to a discharge port 35e. A single-combustion-chamber upstream oxygen detector 36 is provided upstream of the single-combustion-chamber main catalyst 39. A single-combustion-chamber downstream oxygen detector 37 is provided downstream of the single-combustion-chamber main catalyst 39.",
  "title": "VEHICLE AND SINGLE-CYLINDER FOUR-STROKE ENGINE UNIT"
}