Abstract: An engine intake structure comprises an intake passage member 18 which defines an intake passage 36 for supplying air to an internal combustion engine 12, and which also defines a resonator chamber 40 in communication with the intake passage 36; and an in-vehicle device 14 located in an engine room 10 of a vehicle and having a preset reference temperature for temperature control, the intake passage member 18 being located above and adjacent to the in-vehicle device 14. The intake passage 36 extends above the in-vehicle device 14 so as to at least partially overlap the resonator chamber 40 as viewed in a vertical direction, thereby forming a two-layer structure, which makes the in-vehicle device 14 less affected by ambient temperature in the upper part of the engine room 10.

Abstract: An engine intake structure comprises an intake passage member 18 which defines an intake passage 36 for supplying air to an internal combustion engine 12, and which also defines a resonator chamber 40 in communication with the intake passage 36; and an in-vehicle device 14 located in an engine room 10 of a vehicle and having a preset reference temperature for temperature control, the intake passage member 18 being located above and adjacent to the in-vehicle device 14. The intake passage 36 extends above the in-vehicle device 14 so as to at least partially overlap the resonator chamber 40 as viewed in a vertical direction, thereby forming a two-layer structure, which makes the in-vehicle device 14 less affected by ambient temperature in the upper part of the engine room 10.

Abstract: Provided is an intake manifold structure for an internal combustion engine including an intake manifold defining a plurality of branch passages (13) communicating with corresponding intake ports (6) of the internal combustion engine (1) arranged in a cylinder row direction thereof, and provided with additional gas introduction ports (29) communicating with the respective branch passages, and an additional gas introduction passage forming member (16) attached to the intake manifold, and defining an additional gas inlet (35) and additional gas introduction passages (14) communicating the additional gas inlet with the corresponding additional gas introduction ports, wherein the additional gas introduction passage forming member extends across the branch passages, and is provided with a guide wall (33) for defining the additional gas introduction passages in cooperation with an outer surface of the intake manifold and an inner surface of the additional gas introduction passage forming member.

Abstract: An intake manifold including a surge tank having an inlet and a plurality of outlets extended along a first direction, and configured to form a space having a cross section larger than the inlet between the inlet and the plurality of outlets and a plurality of branch pipes. The space is formed by a bottom surface, an upper surface, a first surface extended from a first end of the bottom surface to a first end of the upper surface, and a second surface extended from a second end of the bottom surface to a second end of the upper surface. The inlet is provided at a substantially central portion in a first direction on the first surface, and the bottom surface includes a swelling portion swelled upwardly at a substantially central portion in the first direction.

Abstract: Provided is an intake manifold structure for an internal combustion engine including an intake manifold defining a plurality of branch passages (13) communicating with corresponding intake ports (6) of the internal combustion engine (1) arranged in a cylinder row direction thereof, and provided with additional gas introduction ports (29) communicating with the respective branch passages, and an additional gas introduction passage forming member (16) attached to the intake manifold, and defining an additional gas inlet (35) and additional gas introduction passages (14) communicating the additional gas inlet with the corresponding additional gas introduction ports, wherein the additional gas introduction passage forming member extends across the branch passages, and is provided with a guide wall (33) for defining the additional gas introduction passages in cooperation with an outer surface of the intake manifold and an inner surface of the additional gas introduction passage forming member.

Abstract: An intake manifold including a surge tank having an inlet and a plurality of outlets extended along a first direction, and configured to form a space having a cross section larger than the inlet between the inlet and the plurality of outlets and a plurality of branch pipes. The space is formed by a bottom surface, an upper surface, a first surface extended from a first end of the bottom surface to a first end of the upper surface, and a second surface extended from a second end of the bottom surface to a second end of the upper surface. The inlet is provided at a substantially central portion in a first direction on the first surface, and the bottom surface includes a swelling portion swelled upwardly at a substantially central portion in the first direction.

Abstract: An intake structure for an internal combustion engine of a vehicle comprises an intake passage member (25) internally defining an intake passage (40) having an air inlet (40A) and an air outlet (40B); and a PCU (14) provided in an engine room of the vehicle and provided with a cooling device for cooling the PCU (14). The intake passage member is provided in proximity of the onboard device for favorable heat transfer between the PCU and the intake passage member.

Abstract: An intake duct structure (22) of an engine intake system for an internal combustion engine of a vehicle includes a passage portion (28) internally defining an air passage having an air inlet (22A) located in an upstream end part of the passage portion and an air outlet (22B) located in a downstream end part of the passage portion, and extending above a structural member (40, 11B) of a vehicle body, and a resonator portion (29) depending from the downstream end part of the passage portion and internally defining a resonator chamber (35). The passage portion is provided with a bottom surface (28G) configured to rest on an upper surface of the structural member, and the resonator portion is provided with a vertical surface (29C) opposing a vertical surface of the structural member.

Abstract: An intake manifold includes: multiple branch pipes having downstream ends fastened to a front or rear surface of a cylinder head; a main pipe connected to upstream ends of the branch pipes; and a cover including a cover main body attached to an upper surface of a portion of at least one of the branch pipes to define a blow-by gas passage, and a protrusion protruding upward from the cover main body, the portion of the at least one of the branch pipes being adjacent to the cylinder head, wherein the protrusion is spaced apart from the cylinder head in a fore and aft direction such that a fuel line positioned above the downstream ends of the branch pipes is interposed between the protrusion and the cylinder head in the fore and aft direction, the protrusion being positioned to overlap a part of the fuel line as seen from front.

Abstract: An engine intake structure for an internal combustion engine (13) of a vehicle (1) comprises a vehicle body opening (6) formed in a front part of an engine room (3) of the vehicle, an intake duct member (22) defining an air inlet (22A) facing in a forward direction and an air passage extending rearward from the air inlet, the air inlet being positioned higher than the vehicle body opening, and a flow obstructing member (60) typically consisting of an auxiliary device such as a horn positioned in a straight path extending from the vehicle body opening to the air inlet.

Abstract: An intake manifold includes: multiple branch pipes having downstream ends fastened to a front or rear surface of a cylinder head; a main pipe connected to upstream ends of the branch pipes; and a cover including a cover main body attached to an upper surface of a portion of at least one of the branch pipes to define a blow-by gas passage, and a protrusion protruding upward from the cover main body, the portion of the at least one of the branch pipes being adjacent to the cylinder head, wherein the protrusion is spaced apart from the cylinder head in a fore and aft direction such that a fuel line positioned above the downstream ends of the branch pipes is interposed between the protrusion and the cylinder head in the fore and aft direction, the protrusion being positioned to overlap a part of the fuel line as seen from front.

Abstract: An engine intake structure for an internal combustion engine (13) of a vehicle (1) comprises a vehicle body opening (6) formed in a front part of an engine room (3) of the vehicle, an intake duct member (22) defining an air inlet (22A) facing in a forward direction and an air passage extending rearward from the air inlet, the air inlet being positioned higher than the vehicle body opening, and a flow obstructing member (60) typically consisting of an auxiliary device such as a horn positioned in a straight path extending from the vehicle body opening to the air inlet.

Abstract: An intake duct structure (22) of an engine intake system for an internal combustion engine of a vehicle includes a passage portion (28) internally defining an air passage having an air inlet (22A) located in an upstream end part of the passage portion and an air outlet (22B) located in a downstream end part of the passage portion, and extending above a structural member (40, 11B) of a vehicle body, and a resonator portion (29) depending from the downstream end part of the passage portion and internally defining a resonator chamber (35). The passage portion is provided with a bottom surface (28G) configured to rest on an upper surface of the structural member, and the resonator portion is provided with a vertical surface (29C) opposing a vertical surface of the structural member.

Abstract: An intake structure for an internal combustion engine of a vehicle comprises an intake passage member (25) internally defining an intake passage (40) having an air inlet (40A) and an air outlet (40B); and a PCU (14) provided in an engine room of the vehicle and provided with a cooling device for cooling the PCU (14). The intake passage member is provided in proximity of the onboard device for favorable heat transfer between the PCU and the intake passage member.