Abstract: An air intake device of an internal combustion engine comprises a cylinder head having therein two intake ports that are adapted to connect to a cylinder of a cylinder block; and a single partition plate that extends across both the two intake ports so that each of the two intake ports is divided into first and second air passages.

Abstract: An internal combustion engine, includes: a cylinder head including; a bearing holder; and an integrated cam bracket held to the cylinder head, in a manner that a first cam shaft and a second cam shaft in parallel with each other in a direction of a line of a cylinder are sandwiched between the cylinder head and the integrated cam bracket. The integrated cam bracket includes; a first side frame and a second side frame, bearing beams bridging across the first side frame and the second side frame, the first cam shaft and the second cam shaft being rotatably born by the bearing beams with the bearing holder, a center beam disposed between the first side frame and the second side frame and extending in parallel with the first side frame and the second side frame, and a void portion collinear with the center beam and free from the center beam.

Abstract: An automotive internal combustion engine comprises an engine main body including a cylinder head having intake ports, and a cylinder head cover. Fuel injector valves are disposed to be directed respectively to the intake ports. An intake manifold is installed to a side surface of the cylinder head and outward curved to define a space between the intake manifold and the cylinder head. A blow-by gas recirculation system is provided for feeding blow-by gas introduced out of the cylinder head cover to each cylinder of the engine main body through an intake system. The blow-by gas recirculation system includes a blow-by gas piping which extends from the cylinder head cover to the intake ports for the cylinders. The blow-by gas piping is accommodated within the space defined between the intake manifold and the cylinder head.

Abstract: An automotive internal combustion engine comprises an engine main body including a cylinder head having intake ports, and a cylinder head cover. Fuel injector valves are disposed to be directed respectively to the intake ports. An intake manifold is installed to a side surface of the cylinder head and outward curved to define a space between the intake manifold and the cylinder head. A blow-by gas recirculation system is provided for feeding blow-by gas introduced out of the cylinder head cover to each cylinder of the engine main body through an intake system. The blow-by gas recirculation system includes a blow-by gas piping which extends from the cylinder head cover to the intake ports for the cylinders. The blow-by gas piping is accommodated within the space defined between the intake manifold and the cylinder head.

Abstract: An internal combustion engine, includes: a cylinder head including; a bearing holder; and an integrated cam bracket held to the cylinder head, in a manner that a first cam shaft and a second cam shaft in parallel with each other in a direction of a line of a cylinder are sandwiched between the cylinder head and the integrated cam bracket. The integrated cam bracket includes; a first side frame and a second side frame, bearing beams bridging across the first side frame and the second side frame, the first cam shaft and the second cam shaft being rotatably born by the bearing beams with the bearing holder, a center beam disposed between the first side frame and the second side frame and extending in parallel with the first side frame and the second side frame, and a void portion collinear with the center beam and free from the center beam.

Abstract: An air intake device of an internal combustion engine comprises a cylinder head having therein two intake ports that are adapted to connect to a cylinder of a cylinder block; and a single partition plate that extends across both the two intake ports so that each of the two intake ports is divided into first and second air passages.