ENGINE AND SADDLE TYPE VEHICLE
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United States of America Patent
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N/A
Issued Date -
Jan 8, 2015
app pub date -
Jun 27, 2014
filing date -
Jul 2, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An engine includes a piston and a casing including a cylinder. The cylinder and the piston define a combustion chamber. The casing includes an intake port, a plurality of exhaust ports, a spark plug hole, a drainage hole, and a water jacket. The spark plug hole extends to the combustion chamber. A spark plug is housed in the spark plug hole. The drainage hole extends from the spark plug hole. The water jacket includes a central passage and an inter-port passage. The central passage is located near the spark plug hole. The inter-port passage extends to the central passage. The inter-port passage is arranged between the plurality of exhaust ports. The inter-port passage is located between the drainage hole and the cylinder in a central axis direction of the spark plug hole.
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