Honda Giken Kogyo Kabushiki Kaisha

Atsushi Iwamoto

Shigekazu Tanaka

Toshinari Sonoda

Shigemasa Kajiwara

Masashi Murata

Takashi Taguchi

Masahiko Tashiro

Kazuo Shibata

Yasuyuki Kimura

Kazuhisa Ishizuka

Mitsuo Takashima

Kaoru Aoki

Sigemi Kobayashi

Sumiko Watanabe

Hirokazu Osaki

In an engine block structure in a multi-cylinder engine in which a piston is incorporated from the side of a crank chamber into each of a plurality of cylinders disposed in series in a cylinder block, cylinder axes of the two adjacent cylinders are disposed to extend in such directions that they are gradually spaced apart from each other as proceeding from the side of a valve operating chamber toward the crank chamber as viewed from a direction of arrangement of the cylinders. Thus, a sufficient crankshaft bearing area can be ensured without bringing an increase in number of parts and an increase in size of the engine block.

Engine block structure in multi-cylinder engine

In an engine for a vehicle including a bearing cap integral type oil pan which has a plurality of bearing cap sections integrally provided thereon and which is integrally coupled to a cylinder block, connecting bolts are screwed into the bearing cap sections from the cylinder block to integrally couple the cylinder block and the oil pan to each other. An oil pan chamber, which is an as-cast bore made by drawing a die in an axial direction of a crankshaft, is defined to extend continuously in the axial direction of the crankshaft between the bearing cap sections and a bottom wall of the oil pan. Thus, the oil pan can be produced simply, at a low cost, by a casting process and moreover, it is possible to reduce the weight and size of the oil pan and increase the rigidity of the oil pan.

Engine for vehicle

Growing community of inventors

Wako, Japan

Atsushi Iwamoto