In an intake manifold, a downstream end of an intake introduction pipe has an intake chamber connected thereto, and a resonator is provided adjacent to a bent section of the intake introduction pipe. A resonance chamber of this resonator communicates with the intake chamber via a path-for-resonance. A bottom section of the resonance chamber representing a downward side in a gravity direction inclines downwardly toward a center in a width direction, and a communicating path is formed to communicate with the bent section of the intake introduction pipe. Condensed water accumulated in the resonator flows to the intake introduction pipe through the communicating path from the bottom section, and flows into a projection projecting downwardly from the bent section. Subsequently, the condensed water is discharged to an internal combustion engine side through a gas introduction pipe by which a blow-by gas is introduced.

Methods and systems are provided for adjusting combustion parameters to increase combustion stability during conditions when condensate formed in a charge air cooler may enter cylinders of an engine. In response to increased mass air flow and a condensate level in the charge air cooler, the engine may combust a rich air-fuel ratio while increasing a positive valve overlap.

A motor vehicle has an air intake system with an air duct. The air duct has an air inlet for taking in ambient air and an air outlet. The air duct has a curved bent section which, upstream, is closer to a vehicle running surface than downstream. In the event of a water level of water entering the air duct that is rising parallel to the vehicle running surface, the internal cross section of the bent section is closed by the water before the water can pass the bent section. A plurality of air openings downstream of the bent section is introduced through a wall of the duct in an outer surface of the duct that points away from the vehicle running surface.

An air intake assembly configured to direct air into a throttle body of an engine of an automotive vehicle includes an air cleaner enclosure, primary and secondary air intake ducts and a downstream air intake duct. The primary and secondary air intake ducts route air into the air cleaner enclosure through a first inlet. A method of directing the intake air into the throttle body is also provided. The air cleaner enclosure includes a valve that is configured to move from a closed position to an open position to draw air into the air cleaner enclosure through a second inlet. The valve is moved to the open position upon a pressure increase experienced within the air cleaner enclosure due to water intake. A snorkel has a snorkel inlet that is positioned at an elevation above the first and second inlets.

A filter element assembly includes a filter body and an auxiliary filter. The filter body includes a sidewall around a hollow core. Further the filter body and auxiliary filter are both received and held on a support including a base and a cage.

The air cleaner case includes a valve structure capable of opening and closing a dust discharge port. The valve structure includes: a float member which is disposed below the dust discharge port and can float on water due to its buoyancy; a guide member which holds the float member in a state of being spaced downward from the dust discharge port and, at the time of water immersion, guides the float member ascending due to its buoyancy together with the water level toward the dust discharge port; and a valve body which is spaced downward from the dust discharge port together with the float member to open the dust discharge port and, upon ascent of the float member, comes into contact with the outer circumferential side of the dust discharge port of the bottom wall to close the dust discharge port.

Various embodiments relate to an air intake duct. The duct includes louvers forming an air inlet to a housing. Each louver includes an inlet section and an angled section, the angled section inclined with respect to the inlet section. The duct includes the housing positioned downstream of the louvers in an air flow direction. The housing includes a drain configured to permit separated water from an intake air passing through the louvers and into the housing to be drained from the housing. The duct includes an inner inlet duct that provides the intake air to a component. The inner inlet duct extends into the housing and positioned downstream of the louvers in the air flow direction. The inlet duct extends above the drain by a distance thereby forming a well in the housing between a top of the inner inlet duct and the drain.

A vertically extending air intake duct 1 on a rear of a cab 2 in a delivery vehicle to take in ambient air for an engine through an air intake 3 has a duct body 4 as outer shell with the intake 3 on an upper portion, a side branch section 5 on a lower portion of the body 4 and having upper and lower ends opened in the body 4 and outside, respectively, a mesh member 6 extending over the intake 3 to collect rainwater, a louver 7 for covering the member 6 and the intake 3 to prevent intrusion of matter other than ambient air, and a drip channel or bead 8 on an inner wall of the body 4 and just below the member 6 to capture and guide rainwater flowing down on the inner wall to the upper end of the section 5.

Methods and systems are provided for a turbocharger comprising a compressor inlet shaped to mitigated condensate formation therein. In one example, system may include a condensate trap which runs along an inner wall of the compressor inlet and is shaped to trap condensate.

A system for recirculating blow-by gases into an air intake duct of an internal combustion engine includes a separating device to separate oil in a flow of blow-by gases of the engine. The separator device has an inlet for receiving blow-by gases, at least one discharge for returning the oil separated to the engine, and an outlet for clean blow-by gases. A recirculation duct connects the outlet to an air intake duct of the engine. The recirculation duct has an end connected to the intake duct by a T-connector member, with a main duct portion arranged along the intake duct and a tubular element protruding inside the main duct portion. The tubular element protruding inside the main duct portion has an annular end surface that has an irregular profile, preferably in the form of a saw-like toothed profile.