Internal combustion engine port design layout for enhanced in-cylinder swirl generation
AssigneeGM Global Technology Operations LLC
InventorsShengming Chang, Mark S. Huebler
Life of this patent
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Abstract
An internal combustion engine includes a pair of adjacent cylinders, each one of the pair of adjacent cylinders includes a piston, a first intake valve, a second intake valve, a primary port associated with the first intake valve, and a secondary port associated with the second intake valve. Each of the ports is configured to provide a predominant direction of airflow therethrough during engine operation when viewed from above the cylinders and effectively oriented to provide respective in-cylinder air-swirl of opposite direction in each one of the pair of adjacent cylinders during an intake stroke of a respective piston.
Claims19
An internal combustion engine including a pair of adjacent cylinders, each one of said pair of adjacent cylinders comprising:
- a piston;
- a first intake valve;
- a second intake valve;
- a primary port associated with said first intake valve;
- and
- a secondary port associated with said second intake valve;
- each of said ports being configured to provide a predominant direction of airflow therethrough during engine operation when viewed from above said cylinders, said ports being effectively oriented to provide respective in-cylinder air-swirl of opposite direction in each one of said pair of adjacent cylinders during an intake stroke of a respective piston.
Method for causing an increase in swirl during a respective air-intake stroke in each one of a pair of adjacent cylinders present on an internal combustion engine, each one of the pair of adjacent cylinders having two intake ports and corresponding intake port runners, the method comprising:
- configuring one of said respective intake ports of each one of the pair of adjacent cylinders as a direct port;
- configuring the other of said respective intake ports of each one of the pair of adjacent cylinders as a tangential port;
- arranging all of said respective intake ports so that the direction of swirl in one of the pair of adjacent cylinders is opposite to the direction of swirl in the other of the pair of adjacent cylinders.
Dependencies are inferred from the claim text.