Suction device for internal combustion engine

摘要

A one-piece suction device is provided for an internal combustion engine including a collector into which air flows through an electronically controlled throttle valve driven by an electric motor and individual suction pipes for distributing the air to respective cylinders of the internal combustion engine from the collector. A first bent-form air flow passage is formed which extend from an air intake inlet port of the suction device to an inlet port of the throttle valve and from an outlet port of the throttle valve to the collector. A second bent-form air flow passage is formed between an inlet port of the collector and an outlet port of one of the individual suction pipes. The air flow amount flowing through said first and second bent-form air flow passages is adjusted by said electronically controlled throttle valve.