Nissan Motor Company Limited

Yasushi Noda

Yutaka Matayoshi

Tsuyoshi Masuda

Shigekazu Fuji

Kouji Mori

Masashi Hosoya

Fuji Shigekazu

Hosoya Masashi

According to one exemplary embodiment of the present invention, there is provided an intake device of an internal combustion engine, having a plurality of intake passages for introducing an intake gas into a row of engine cylinders, respectively; and a secondary gas passage for introducing a secondary gas into the intake passages. The secondary gas passage includes a main gas channel, an adjacent gas channel extending downstream from the main gas channel adjacently and substantially in parallel with the main gas channel, and branch gas channels branching off from the adjacent gas channel and continuing to the intake passages.

Intake device of internal combustion engine

This invention relates to an exhaust recirculation system for a multi-cylinder internal combustion engine (,), wherein intake air aspirated to a collector (,) from an intake passage (,) of circular cross-section is provided to cylinders (&num;,) via branch pipes (,A-,D) connected the collector (,). The exhaust gas recirculation system is provided with an exhaust gas recirculation pipe (,) which branches off from an exhaust passage (,) and connected to the intake passage (,), and an exhaust gas inlet (,) which leads a recirculated exhaust gas of the exhaust recirculation pipe (,) into the intake passage (,) along a tangent line of the circular cross-section of the intake passage (,).

Exhaust recirculation system of internal combustion engine

A liquid-cooled engine cylinder block wherein a plurality of cylinder walls forming cylindrical cylinders are arranged in series. The adjacent cylinder walls are joined together, and the outer circumference of these cylinder walls is covered by a water jacket wall. A passage for cooling liquid is formed between the water jacket wall and the cylinder walls in a direction perpendicular to the axes of cylinders. A guide rib is provided in the passage adjacent to the outer circumference of the cylinder walls so as to vertically divide the flow of cooling liquid. The guide rib comprises two guide members, one of which is inclined in an upward direction and the other inclined in a downward direction from their respective upstream ends. The cooling liquid in the passage is separated into upper and lower flows by the guide rib, and these flows combine a hollow area of the cylinder walls at the side of the cylinder joining member at the downstream of the guide rib. This arrangement increases the flowrate of cooling fluid in the hollow areas, and prevents the temperature of the joining members from rising above that of other parts of the cylinder block.

Cylinder block for liquid-cooled engine

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Yokohama, Japan

Yasushi Noda