Air intake port for a lean-burn gasoline engine
AssigneeJaguar Land Rover Limited
InventorsJack Johnson, Lyn McWilliam
Life of this patent
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Abstract
An air intake port (10) for a lean-burn gasoline engine (110) comprises an air inlet (14), two air outlets (15a, 15b), and an air channel connecting the air inlet (14) to the two air outlets (15a, 15b) and comprising an upstream common duct (11) and two downstream port legs (12a, 12b), the two downstream port legs (12a, 12b) branching off from the common duct (11) at a bifurcation point (13). A total cross section of the air intake port (10) gradually decreases between the air inlet (14) and the two air outlets (15a, 15b). A gradient of decrease of the total cross section is locally reduced in a region adjacent the bifurcation point (13).
Claims20
An air intake port for a lean-burn gasoline engine, the air intake port comprising:
- an air inlet,
- two air outlets, and
- an air channel connecting the air inlet to the two air outlets and comprising an upstream common duct and two downstream port legs, the two downstream port legs branching off from the common duct at a bifurcation point, wherein
- a total cross section of the air intake port gradually decreases between the air inlet and the two air outlets, and wherein a gradient of decrease of the total cross section is locally reduced in a region adjacent the bifurcation point.
An air intake port for a lean-burn engine, the air intake port comprising:
- an air inlet,
- two air outlets, and
- an air channel connecting the air inlet to the two air outlets and comprising an upstream common duct and two downstream port legs, the two downstream port legs branching off from the common duct at a bifurcation point,
- wherein a total cross section of the air intake port remains substantially constant in a region adjacent the bifurcation point.
Dependencies are inferred from the claim text.