Isuzu Motors Limited

Tomohisa Sako

Yasushi Yamamoto

Makoto Abe

Hiroyuki Kawanishi

A steam engine of a simple constitution capable of efficiently obtaining mechanical energy not only from a heat source of a high temperature but also from various heat sources in a low-temperature state such as the exhaust heat of an internal combustion engine. The engine comprises a displacement enginehaving a rotorthat rotates, a steam-generating portionarranged thereunder and a condenserarranged thereover. Water heated in the steam-generating portionbecomes the steam which is fed into the displacement engine, enters into an operation chamber that moves up, rotates the rotorand is, thereafter, fed into the condenserwhere it is condensed to turn into the condensate. The condensate falls on the rotoron the lower side due to gravity, and is refluxed into the steam-generating portionthrough the operation chamber that moves downward with rotation of the rotor. The steam engine efficiently operates even at low speeds, requires no pump for refluxing the condensate, and is constituted in a compact size.

Rotary displacement steam engine

A proportional solenoidcomprising: an electromagnetic coil; a fixed yokeprovided immovably inside the electromagnetic coiland having a convex portionformed at an edge portion of an end surface of the fixed yoke; and a movable yokethat is disposed inside the electromagnetic coil, has a tip portion thereof inserted into the convex portionof the fixed yoke, and is provided movably relative to the fixed yoke, the proportional solenoidenabling the position adjustment of the movable yokeby controlling an electric current applied to the electromagnetic coil, wherein a protruding portionthat protrudes at the side of the fixed yokeis formed at an edge portion of the surface of the movable yokeon the side of the fixed yoke, and an inner surfaceof this protruding portionis tapered such that the inner surface is located further outside as the inner surface approaches the fixed yoke

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Kanagawa, Japan

Tomohisa Sako