Suction apparatus for engine
AssigneeMazda Motor Corporation
InventorsMakoto Araki, Tetsuji Yahiro, Katsunori Morimune
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Abstract
This invention relates to an engine suction apparatus in which a tuning frequency of pressure-vibration characteristics of a suction path on the upstream side of a throttle body coincides with a frequency of a pressure vibration applied from a suction port to the suction path at an idling engine speed. The suction apparatus includes an idling path, branching from the suction path on the upstream side of the throttle body, for supplying intake air in an idling state, and a resonance silencer which resonates at the tuning frequency to reduce noise is connected to the idling path.
Claims13
A suction apparatus for an engine, which comprises:
- a suction path located at an upstream side of a throttle body, a tuning frequency of pressure-vibration characteristics of said suction path coinciding with a frequency of a pressure vibration applied from a suction port of the engine in an idling state into said suction path;
- an idling path, branched from said suction path on the upstream side of the throttle body, for supplying intake air in the idling state;
- and
- silencer means which is connected to said idling path, and resonates at the tuning frequency to reduce noise.
Dependencies are inferred from the claim text.