Filtration systems having a tangential air cleaner having a coiled media filter element and a cyclonic pre-cleaner are described. An outer wall of the filter element acts as a pre-cleaner sleeve of the housing to generate a cyclonic flow of the intake air prior to the intake air being filtered by the filter element. The housing cover includes geometry that redirects the cyclonic low from a tangential path to an axial, straight-through flow directed through an inlet flow face of the filter element. Various embodiments of such filtration systems offer increased filter performance and capacity compared to similarly sized cylindrical pleated filter elements having a radial flow filtering path.

An internal combustion engine includes an engine block including a cylinder, a horizontally oriented crankshaft, an air-fuel mixing device configured to provide an air-fuel mixture to the cylinder, and an air filter assembly configured to provide filtered air to the air-fuel mixing device. The air filter assembly includes a housing comprising a first housing end portion and a second housing end portion and defining an interior volume, a filter element positioned within the interior volume dividing the interior volume into a filtered volume and an unfiltered volume, a gap between the filter element and the housing configured to allow air to flow between the filter element and the housing, an air intake, and a filtered air outlet.

An internal combustion engine includes an engine block including a cylinder, a horizontally oriented crankshaft, an air-fuel mixing device configured to provide an air-fuel mixture to the cylinder, and an air filter assembly configured to provide filtered air to the air-fuel mixing device. The air filter assembly includes a housing comprising a first housing end portion and a second housing end portion and defining an interior volume, a filter element positioned within the interior volume dividing the interior volume into a filtered volume and an unfiltered volume, a gap between the filter element and the housing configured to allow air to flow between the filter element and the housing, an air intake, and a filtered air outlet.

A flowmeter is inserted into a main passage through which a target fluid flows. The flowmeter includes a housing, a sub passage, an inlet portion, an outlet portion, a flow rate detector, and a protrusion. The housing includes a side surface and a tip end surface. A part of the target fluid flows into the sub passage from the main passage. The target fluid flows into the sub passage through the inlet portion and flows out of the sub passage through the outlet portion. The flow rate detector is configured to detect a flow rate of the target fluid flowing through the sub passage. The tip end surface includes a first end area and a second end area. The protrusion protrudes from the tip end surface and is located in both the first end area and the second end area.

An air induction system for a vehicle includes a turbocharger having a compressor side inlet and a bifurcated clean air intake system having a bifurcated conduit. The bifurcated conduit includes an upstream end configured to receive intake air, a downstream end configured to supply intake air to the compressor side inlet, an inner passage configured to supply intake air to the downstream end, and an outer passage disposed about the inner passage and separated from the inner passage by an inner wall, the outer passage configured to selectively receive recirculation backflow from the compressor side inlet. A port is fluidly coupled between the outer passage and another location of the vehicle. The port is configured to selectively evacuate at least a portion of the recirculation backflow to the another location the vehicle.

According to the present disclosure, air cleaner assemblies, housings, serviceable filter cartridges and features, components, and methods, relating thereto are disclosed. In general, the features relate to systems that are configured to aid in inhibiting an improper cartridge from being installed in an air cleaner housing, during servicing. A variety of features are characterized, and in many examples, the cartridge includes a seal arrangement having radially directed seal surface with at least a first non-wavy or non-projection/recess section and a second wavy or projection/recess section. Examples are shown and described in detail.

An adapter assembly includes an adapter body extending from an adapter inlet to an adapter outlet, a canister mount for securing the adapter body to an air filter canister, and an adapter joint for securing the adapter body to the canister mount. The canister mount includes a collar that is secured about the air filter canister. The adapter joint allows the adapter body to be moved away from the air filter canister for air filter replacement without having to disconnect the adapter body from the air filter canister. Precleaners are airtightly securable to the adapter body inlet, and the air filter canister is airtightly securable to the adapter body outlet. Air cleaned by the precleaners before reaching the air filter has less contamination to be filtered by the air filter before the air flows into an engine. Precleaning significantly extends the life of air filters.

An air cleaner may include a filter case configured to introduce, by a suction force of an internal space, ambient air being discharged through a filter provided in the internal space as intake air from which foreign substances are removed; and a built-in valve built in the internal space of the filter case and configured to form an ambient air introduction path for introducing the ambient air and an additional ambient air introduction path separated from the ambient air introduction path and to open the additional ambient air introduction path so that the ambient air flows into through the additional ambient air introduction path when the suction force is increased.

A filter module for filtering a fluid is provided with a filter element that has a filter bellows of a filter medium and is provided with a designated raw side and a designated clean side oppositely positioned relative to the designated raw side. A fastening frame is connected to the filter element and has a frame wall enclosing circumferentially at least partially a rim of the filter element. A circumferentially extending first sealing element is arranged on an exterior side of the frame wall of the fastening frame. The fastening frame has at least one locking element on an exterior side of the fastening frame. A second sealing element that seal the raw side and the clean side relative to each other is arranged on the filter element. The second sealing element can be guided into a sealing position upon locking of the at least one locking element in the installation position of the filter module.

A vehicle which supplies a fuel from a fuel tank to an air-intake passage comprises a first injector which injects the fuel into the air-intake passage; a second injector which is disposed to be apart from the first injector in a flow direction of intake-air and injects the fuel into the air-intake passage; a fuel pump which discharges the fuel from the fuel tank; a first fuel tube, a first end of which is connected to the fuel pump; a second fuel tube, a first end of which is connected to the second injector; and a connector which is connected to a second end of the first fuel tube, a second end of the second fuel tube, and the first injector, and distributes the fuel from the first fuel tube, to the second fuel tube and the first injector, and the connector is firmly coupled to the first injector.