Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Nobuhiro Kawakami

Toshihiko Oka

Kazuki Yagi

Masahiko Kubo

Yusuke Kido

Hayato Sugimura

Sumito Hori

In a cylinder head () having a built-in exhaust manifold () of an engine (), outer coolant passages (A andB) in which an engine coolant circulates are provided, and are disposed along the manifold positioned at a side of an outer surface (C) of the cylinder head (). Further, inner coolant passages (A andB) having shapes which are branched from the outer coolant passages (A andB) and then join are provided, and are disposed along the outer coolant passages (A andB) and at an inner side of the cylinder head ().

Cylinder head of engine

An engine includes a side wall, a head cover, and a cam cover. The cam cover is disposed obliquely relative to the side wall. The cam cover has a seal line that seals up a gap between the head cover and the cam cover. The engine further includes a cam cap fixed to an upper surface of the side wall to support a camshaft so as to be rotatable between the side wall and itself.

Engine

An engine includes: an oil control valve built in a cylinder head, and configured to control a pressure of oil to be supplied to a variable valve mechanism via a camshaft; and a cam cap fixed to an upper face of the cylinder head, and configured to rotatably support the camshaft between the cam cap and the cylinder head, as a flow passage for the oil to be force-fed from an oil pump to the oil control valve, the cam cap including: a lateral passage formed inside the cam cap, and extended in a direction along the upper face of the cylinder head; and a downward passage extended downward from the lateral passage so as to serve as a downstream side flow passage of the lateral passage, and configured to guide the oil toward the oil control valve.

Growing community of inventors

Okazaki, Japan

Nobuhiro Kawakami