Abstract: An intake manifold 10 includes: a surge tank 11 that is connected on an upstream side thereof to a throttle valve 13; multiple branch pipes 12 that are arranged side by side in a longitudinal direction of the surge tank 11 and respectively connected to cylinders; and a PCV chamber 15 that is provided upstream of a central part in the longitudinal direction of the surge tank 11. The intake manifold includes: a blowby gas introduction port 16g that is designed to introduce blowby gas into the PCV chamber 15; and a blowby gas exhaust port 16f that is designed to discharge the blowby gas from the PCV chamber 15 into the surge tank 11, and the blowby gas exhaust port 16f is located at a position higher than the blowby gas introduction port 16g.

Abstract: An intake manifold 10 includes: a blowby gas introduction port 16g that is configured to introduce blowby gas into a PCV chamber 15; a blowby gas exhaust port 16f that is configured to discharge the blowby gas from the PCV chamber 15 into a surge tank 11; and a drain hole 17c that is configured to discharge water contained in the blowby gas, from the PCV chamber 15 into the surge tank 11. A bottom wall 17d of the surge tank 11 includes protruding parts 17e, 17f that protrude upward, the blowby gas exhaust port 16f is located upstream of the most upstream side protruding part 17e located on the most upstream side, and the drain hole 17c is located downstream of the most upstream side protruding part.

Abstract: An intake manifold 10 includes: a surge tank 11 that is connected on an upstream side thereof to a throttle valve 13; multiple branch pipes 12 that are arranged side by side in a longitudinal direction of the surge tank 11 and respectively connected to cylinders; and a PCV chamber 15 that is provided upstream of a central part in the longitudinal direction of the surge tank 11. The intake manifold includes: a blowby gas introduction port 16g that is designed to introduce blowby gas into the PCV chamber 15; and a blowby gas exhaust port 16f that is designed to discharge the blowby gas from the PCV chamber 15 into the surge tank 11, and the blowby gas exhaust port 16f is located at a position higher than the blowby gas introduction port 16g.

Abstract: An intake manifold 10 includes: a blowby gas introduction port 16g that is configured to introduce blowby gas into a PCV chamber 15; a blowby gas exhaust port 16f that is configured to discharge the blowby gas from the PCV chamber 15 into a surge tank 11; and a drain hole 17c that is configured to discharge water contained in the blowby gas, from the PCV chamber 15 into the surge tank 11. A bottom wall 17d of the surge tank 11 includes protruding parts 17e, 17f that protrude upward, the blowby gas exhaust port 16f is located upstream of the most upstream side protruding part 17e located on the most upstream side, and the drain hole 17c is located downstream of the most upstream side protruding part.

Abstract: An intake apparatus for an internal combustion engine includes a plurality of branch pipes connected at downstream ends thereof to an engine main body, an intake chamber to which upstream ends of the branch pipes are connected, and a common intake air introducing part connected to the center of the intake chamber in a cylinder arrangement direction. The intake chamber includes a projecting part projecting toward the engine main body relative to the common intake air introducing part. An EGR introducing passage is connected to the center of the projecting part in the cylinder arrangement direction. A downstream end of the EGR introducing passage is directed toward a wall of the projecting part on the common intake air introducing part side.

Abstract: An intake apparatus for an internal combustion engine includes a plurality of branch pipes connected at downstream ends thereof to an engine main body, an intake chamber to which upstream ends of the branch pipes are connected, and a common intake air introducing part connected to the center of the intake chamber in a cylinder arrangement direction. The intake chamber includes a projecting part projecting toward the engine main body relative to the common intake air introducing part. An EGR introducing passage is connected to the center of the projecting part in the cylinder arrangement direction. A downstream end of the EGR introducing passage is directed toward a wall of the projecting part on the common intake air introducing part side.