Intake air routing device for an engine, and engine incorporating same

An intake air routing device for an internal combustion engine, said intake air routing device comprising:

• a hollow case body having an air chamber formed therein;
• an air filter element disposed in the case body;
• an intake duct disposed on first end of the case body and connected to the air chamber via said air filter element;
• a pair of funnel members each defining a portion of an intake passage and disposed at a second end of the case body, each intake passage being operatively connected to said engine;
• and
• a partition wall arranged between the intake passages and extending from the second end of the case body into the air chamber up to a position beyond upstream ends of said funnel members.

An internal combustion engine, comprising

• a plurality of cylinders, each having an intake port;
• a pair of funnel members, each defining a portion of an intake passage operatively connected with a respective one of said intake ports;
• a case body having an air chamber formed therein;
• said air chamber configured to accommodate said pair of funnel members therein;
• an intake duct disposed at an end portion of the case body and connected to the air chamber via an air filter arranged in the case body;
• and
• a partition plate arranged in said air chamber between the intake passages and extending in the air chamber up to a position beyond the upstream ends of the funnel members.