Ushio Denki Kabushiki Kaisha

Yamaha Hatsudoki Kaisha

Shintaro Sato

Shigenori Nakata

Seisaku Kamiya

An engine (internal combustion engine), in accordance with an embodiment, includes: a crankcase having an oil pan; a crankshaft disposed inside the crankcase; a second crank gear disposed inside the crankcase to rotate about the crankshaft; a driven gear meshed with the second crank gear to be rotated as the second crank gear rotates; an oil pump drive gear meshed with the driven gear to rotate together with the driven gear; and an oil pump gear to be rotated as the oil pump drive gear rotates. The oil pump gear is disposed to overlap the driven gear as viewed from an axial end of the crankshaft.

Internal combustion engine and vehicle having the internal combustion engine

A particle counting device is improved to prevent adhesion impurities that result from condensation of condensation vapor on optical systems and the like in a particle detection area or the like of a measuring device to detect particles contained in the atmosphere or in certain gases and using condensation nuclei. In particular, in a particle measuring operation in which, in a chamber for saturated vapor that contains a liquid that can condense at a room temperature, a gas is added to a saturated vapor, the gas is introduced into a condensation part that is at a room temperature, the vapor is condensed on the particles as nuclei, and in which the particles, in a connected particle detection area, are measured, a heater is provided to keep the temperatures of the detection area, the connection pipe and the nozzle at least at a temperature higher than or equal to the temperature of the condensation part, to prevent adhesion impurities of condensation vapor on optical systems and the like in the detection area.

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Shizuoka, Japan

Shintaro Sato