Multi-cylinder engine intake structure
AssigneeYanmar Power Technology Co., Ltd.
InventorsMasataka Uchibori, Makoto Shimono, Ai Iketani
Life of this patent
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Abstract
This multi-cylinder engine intake structure is provided with a fresh air distribution chamber into which a plurality of fresh air distribution openings communicating with the individual intake ports are opened, and a gas collection chamber. The gas collection chamber includes a communication region into which a first communication opening communicating with the fresh air distribution chamber is opened, a first mixture region into which an air inlet and an EGR gas inlet are opened and which is positioned upstream of the communication region in a flow direction of a mixture gas of air and EGR gas, and a second mixture region positioned downstream of the communication region in the flow direction of the mixture gas.
Claims7
A multi-cylinder engine intake structure in which exhaust gas is partially recirculated as EGR gas for fresh air taken into a plurality of cylinders, the multi-cylinder engine intake structure comprising:
- a fresh air distribution chamber in which a plurality of fresh air distribution openings are open, the plurality of fresh air distribution openings communicating with individual intake ports of the plurality of cylinders;
- and
- a gas collection chamber in which an air inlet for introducing air, an EGR gas inlet for introducing the EGR gas, and a first communication opening that communicates with the fresh air distribution chamber are open,
- wherein the first communication opening is located on a downstream side relative to a flowing direction of mixture gas of the fresh air and the EGR gas, and located in a middle of the gas collection chamber relative to a flowing direction, and the air inlet is located on the downstream side relative to the EGR gas inlet.
Dependencies are inferred from the claim text.