Intake system for vehicle internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHaruhiko Saito, Tatsuya Oyama
Life of this patent
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Abstract
An intake system (10, 20) for a vehicle internal combustion engine is provided in which a first air intake duct (16), having an air intake inlet (16a) to inhale external air, is connected to an air cleaner box (14). A second air intake duct (17, 27) is also connected to the air cleaner box. The air intake inlet is closer to the air cleaner box than the second air intake duct is. The cross section area of a second air intake duct is greater than the cross section area of the first air intake duct. The center axis of the second air intake duct at an end on the side of a second air intake opening (12, 22) intersects with the center axis of the first air intake duct at an end on the side of a first air intake opening (11).
Claims13
An intake system for a vehicle internal combustion engine, comprising:
- an air cleaner box that has a first air intake opening, a second air intake opening and a communication opening that communicates with an intake port of the vehicle internal combustion engine;
- a first air intake duct that has an air intake inlet and is connected to the air cleaner box such that air is inhaled from the air intake inlet into the air cleaner box through the first air intake opening;
- a second air intake duct that is connected to the air cleaner box such that air is inhaled into the air cleaner box through the second air intake opening, wherein the air intake inlet is farther apart from the air cleaner box than the second air intake duct is;
- and
- an on-off valve that is provided in the second air intake duct such that air is inhaled into the air cleaner box through the first air intake opening when the on-off valve is closed, and air is inhaled into the air cleaner box through both of the first air intake opening and the second air intake opening when the on-off valve is opened,
- wherein the cross section area of the second air intake duct is greater than the cross section area of the first air intake duct, and
- the first air intake duct and the second air intake duct are disposed such that a center axis of the second air intake duct at an end portion on a side of the second air intake opening intersects with a center axis of the first air intake duct at an end portion on a side of the first air intake opening.
Dependencies are inferred from the claim text.