Toyota Jidosha Kabushiki Kaisha

Yusei Kusaka

Hiroyuki Ikuta

Tomohiko Nishiyama

Kazuhisa Mitani

Makoto Kikuchi

Shoichi Tsuchiya

Yukio Fukuta

Kazuya Mikashima

Shigeru Hatakeyama

An intake-port core includes a body part having the same outer shape as that of the intake port, a port-injector part having the same outer shape as that of a port-injector insertion part, and an extending part. A cooling-water flow-passage core includes a water-jacket core having the same outer shape as that of a water jacket. The intake-port core is inserted from the extending part thereof into the water-jacket core so as to join the cooling-water flow-passage core to the intake-port core. Thereafter, a core print part that is a separate body from the intake-port core is joined to the intake-port core.

Assembling method of cores

A vacuum casting apparatus that performs casting through decompression of a cavity includes: an ejector pin for releasing a molding from a mold; a pinhole that is a hole in which the ejector pin is slidably arranged and that has a small diameter portion and a large diameter portion that is more distant from the cavity than the small diameter portion is and is larger in diameter than the small diameter portion; and a hollow portion that is provided under an end portion, on a side where the cavity is present, of the large diameter portion.

Vacuum casting apparatus

A pilot air passage, a pilot fuel passage and a main fuel passage are formed in a gun head for supplying pilot air and fuel. At least one of a flow amount detecting orifice, a flow amount adjusting needle valve and a pressure detecting plug is provided in each of the pilot air passage, the pilot fuel passage and the main fuel passage and is coupled to the gun head so as to be handled together with the gun head. A pilot air tube, a pilot fuel tube and a main fuel tube are constructed in the form of a triplet tube.

Structure for supply of fuel and pilot air

A combustion apparatus includes a combustion chamber and a single-type regenerative combustion burner. The burner is arranged with respect to the combustion chamber so that a direction in which burnt gas returns to the burner is not opposed to a direction in which fuel and supply air are expelled from the burner. This combustion apparatus is applicable to various types of industrial furnaces including various types of boilers, for example, a crucible-type furnace.

Growing community of inventors

Toyota, Japan

Yusei Kusaka