{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A vehicle on which a single-cylinder four-stroke engine unit which is able to stably detect the oxygen density in exhaust gas is mounted is provided. A single-combustion-chamber main catalyst 39 is at least partially positioned frontward of a crankshaft axis Cr1, and purifies the exhaust gas…",
  "path": "/patents/926815",
  "publishedAt": "2017-05-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60K13/04",
    "YAMAHA MOTOR CO LTD [JP]"
  ],
  "textContent": "A vehicle on which a single-cylinder four-stroke engine unit which is able to stably detect the oxygen density in exhaust gas is mounted is provided. A single-combustion-chamber main catalyst 39 is at least partially positioned frontward of a crankshaft axis Cr1, and purifies the exhaust gas exhausted from one combustion chamber 29 most in an exhaust path extending from the one combustion chamber 29 to a discharge port 35e. A single-combustion-chamber upstream oxygen detector 37 is provided upstream of the single-combustion-chamber main catalyst 39 in the flow direction of the exhaust gas. The path length from the one combustion chamber 29 to the single-combustion-chamber upstream oxygen detector 37 is longer than the path length from the single-combustion-chamber upstream oxygen detector 37 to the upstream end of the single-combustion-chamber main catalyst 39.",
  "title": "VEHICLE AND SINGLE-CYLINDER FOUR-STROKE ENGINE UNIT"
}