Gas admission valve assembly includes a housing, an elongated valve guide disposed within a central bore of the housing, a valve including a valve stem slidably disposed within the valve guide and a valve head selectively engagable with a valve seat of the housing to control flow between gas entry and exit openings into a housing entry chamber. First and second stem seals are disposed at opposite ends of the valve guide in sealing engagement with the valve stem between the valve stem and the central bore of the housing distally and the valve guide proximally.

The invention relates to an internal combustion engine with intake manifold injection, comprising at least two combustion chambers, at least one central rail for supplying fuel for the intake manifold injection, and at least one air distributor for supplying air to the individual combustion chambers, characterized in that the central rail is attached to the air distributor, or the central rail and the air distributor are formed as an integral component.

The invention relates to an air filter housing for use in an air cleaning arrangement for cleaning air to be provided to an air inlet of an internal combustion engine. The air filter housing comprises: a filter housing inlet for receiving air; and a filter housing outlet for providing filtered air to the air inlet of the internal combustion engine when an air filter is arranged inside the air filter housing between the filter housing inlet and the filter housing outlet. The air filter housing further comprises a closing arrangement controllable to be in each of a first state in which the filter housing outlet is closed by the closing arrangement, and a second state in which the filter housing outlet is open. The closing arrangement may comprise an iris shutter.

A cowling for an outboard motor extends from port side to starboard side in a lateral direction. The cowling includes port and starboard inlets that direct flow of intake air into the cowling and face outwardly in the lateral direction. The cowling further comprises port and starboard duct systems. Each duct system is configured to receive and convey intake air from one of the port and starboard intake ports to an intake conduit for the outboard motor. Each duct system defines a first separation region that receives and conveys the intake air laterally outward to separate a first portion of water from the intake air. Each duct system further defines a second separation region that receives and conveys the intake air from the first separation region laterally inward to separate a second portion of water from the intake air.

In certain implementations, a ship propulsion system includes: at least one internal combustion engine with: a combustion chamber for burning a fuel; an intake tract for supplying fresh air to the combustion chamber; and a turbocharger with a compressor in the in-take tract; an electrolysis device for producing hydrogen gas for the internal combustion engine and for producing oxygen gas; an alcohol tank for supplying alcohols to the internal combustion engine; and a water tank, wherein the water tank and the alcohol tank are connected to the combustion chamber or a pressure side of the compressor for the supply of water and alcohol into the intake tract, and wherein the electrolysis device is connected to the pressure side of the compressor for supplying hydrogen gas into the intake tract or connected to the combustion chamber for supplying hydrogen gas into the combustion chamber.

Air induction systems are for an internal combustion engine. The air induction systems comprise an air intake plenum that conducts intake airflow to an air cleaner for cleaning prior to combustion in the internal combustion engine. The air intake plenum is movable with respect to the air cleaner between an open position separated from the air cleaner and a closed position connected to the air cleaner. A bellows connects the air intake plenum to the air cleaner when the air intake plenum is in the closed position. The bellows has an upstream first end that seals with the air intake plenum and a downstream second end that seals with the air cleaner.

An air intake device includes a bypass passage which makes a portion of an air intake passage on an upstream side of a compressor and a portion of the air intake passage on a downstream side of the compressor communicate with each other, and a bypass passage open/close valve which opens or closes the bypass passage. The air intake passage includes a first passage extending toward an upstream side from the compressor along a first direction, a bent portion bent from an upstream end of the first passage in a second direction, and a second passage extending from an upstream end of the bent portion along the second direction. The second passage has a vertically elongated cross-sectional shape. A vibration suppressing part for suppressing vibrations of the second passage is disposed in at least one of the second passage and the bent portion.

An intake system for a vehicle may include an intake manifold having an internal space divided into a first chamber and a second chamber by a partition wall, in which intake air flows into the first chamber through a charging path and is then discharged to a portion of an intake port connected to the intake manifold; and intake air flows into the second chamber through a bypass path bypassing charger and is then discharged to another portion of the intake port.

Methods and systems are provided for introducing a charge motion to a cylinder via a bladder in an intake manifold runner. In one example, a system may include positioning a bladder in an intake port proximate to a cylinder.

The present teachings provide for an air system for an internal combustion engine (“ICE”). The air system can include a compressor, separation device, first conduit, second conduit and a system for controlling a ratio of gasses that enter the combustion chamber during an intake stroke. The separation device can include a housing and membrane. The housing can be fluidly coupled to the compressor and configured to receive a first volume of intake air therefrom. The membrane can be disposed within the housing and configured to separate the first volume of intake air into a volume of nitrogen-rich air and a volume of oxygen-rich air. The first conduit can fluidly couple the compressor to the combustion chamber. The second conduit can fluidly couple the compressor to the separation device. The gasses can include the volume of nitrogen-rich air, the volume of oxygen-rich air, and a second volume of intake air.