Toyota Jidosha Kogyo Kabushiki Kaisha

Nobutaka Morimitsu

Tomio Kumoi

Katsuhiko Tsuruta

A glow plug for rotary piston engines adapted to be mounted in an engine plug hole so as not to project from the plug hole and to be traversed by a flow of fuel-air mixture temporarily trapped in the plug hole. The plug includes an elongated protective tube providing a straight root portion by which it is supported from a plug housing adapted to be inserted in a plug hole. The tube terminates in a closed end hook-shaped free tip portion spaced from the root portion and plug housing and lying in the same plane as the root portion. A helical heater coil is disposed in the protective tube with the pitch of the coil being smaller at the free tip portion than at the root portion so that greater heat is generated in the free tip portion than in the root portion.

Sheath glow plug for rotary piston engines

A linear oil seal means principally intended to obtain an oil scraping effect in a rotary piston engine, comprising a linear oil seal element mounted in a linear groove formed as cut at the side wall portion of the rotor along a line extending from an outer peripheral portion of the conventional annular oil seal means provided at the side wall of the rotor to a vicinity of the conventional corner seal of the rotor and adapted to exert a radially inwardly oriented force component to the oil to be scraped during the rotation of the rotor.

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Toyota, Japan

Nobutaka Morimitsu