An air suction device for a vehicle equipped with an internal combustion engine. The air suction device includes a device guiding purified suction air for combustion in the direction of the internal combustion engine, and an air filter element and a housing receiving the air filter element, and at least one air guiding device. The air guiding device is formed in the shape of a channel and is provided for guiding suction air to the housing. The air guiding device extends in the region between a holding device and the housing. The holding device is formed to receive at least one light source and has an air leading channel adjacent to the light source, which is connected in an air guiding manner to the air guiding device.

A precleaner arrangement for separating a portion of entrained material from air flow air entering an engine air cleaner. The precleaner arrangement includes a precleaner housing and at least a first flexible air deflection vane with a fixed portion secured to the precleaner housing and a deflectable portion. The deflectable portion includes a curved section extending from the fixed portion and a tail section extending from the curved section. The deflectable portion is configured to deflect in response to a sufficient air flow rate change through the precleaner arrangement, in use. Some arrangements will also include a second stage, outlet vane assembly.

Methods and systems are provided for an airbox. In one example, the airbox is a single piece comprising features to receive and retain a platform for an air filter. The airbox comprises curved elastomers which engage with coupling elements of the platform.

An apparatus and methods are provided for an air cleaner to be mounted onto an air inlet of an internal combustion engine. The air cleaner comprises an air filter that includes a filter medium disposed between a curved base and a cover. The curved base provides an interface between the air filter and the air inlet, and comprises a shape that provides clearance between the curved base and an electric choke installed onto a carburetor comprising the air inlet. The cover secures the air filter and the curved base to the air inlet such that an airstream is drawn through the filter medium and is conducted into the air inlet. A raised portion of the cover is configured to cooperate with the curved base to ensure a desired volume of the airstream is available to the air inlet at substantially all engine speeds.

An intake plenum is for a marine engine, the marine engine having first and second throttle devices for controlling flow of intake air to the marine engine. The intake plenum has an airbox providing an expansion volume, first and second inlets that convey the intake air in parallel to the expansion volume, first and second outlets that convey the intake air in parallel from the expansion volume to the first and second throttle devices, and first and second Helmholtz-style attenuator devices located at the first and second outlets, respectively. Together the first and second inlets, expansion volume, and first and second Helmholtz-style attenuator devices are configured to attenuate different frequencies of sound emanating from the marine engine via the first and second outlets.

An internal combustion engine includes an engine block, an air-fuel mixing device, and an air filter assembly. The air filter assembly includes a housing, a filter element, and a gap between the filter element and the housing. The housing includes a base and a cover which define an interior volume. The housing includes an outlet passage fluidly coupling a filtered air outlet to a final air outlet. The filter element divides the interior volume into a filtered volume and an unfiltered volume. The gap is configured to direct air in a first airflow pass before being filtered by the filter element. The filter element is configured to direct filtered air in a second airflow pass in a substantially opposite direction from the first airflow pass. The outlet passage is configured to direct filtered air into a third airflow pass in a substantially same direction as the first airflow pass.

An internal combustion engine includes an engine block, an air-fuel mixing device, and an air filter assembly. The air filter assembly includes a housing, a filter element, and a gap between the filter element and the housing. The housing includes a base and a cover which define an interior volume. The housing includes an outlet passage fluidly coupling a filtered air outlet to a final air outlet. The filter element divides the interior volume into a filtered volume and an unfiltered volume. The gap is configured to direct air in a first airflow pass before being filtered by the filter element. The filter element is configured to direct filtered air in a second airflow pass in a substantially opposite direction from the first airflow pass. The outlet passage is configured to direct filtered air into a third airflow pass in a substantially same direction as the first airflow pass.

An apparatus and a method are provided for an aircharger air intake system for filtering and conducting an airstream to an air intake of an engine. The aircharger air intake system includes an air filter comprising a filter medium configured to entrap particulates flowing within the airstream. An air box comprising one or more sidewalls and a mount wall is configured to support the air filter within an engine bay. The air box is configured to be mounted, or fastened, onto the engine. An intake tube is coupled with the air filter and configured to conduct the airstream to the air intake of the engine. The intake tube is configured to be coupled with an air temperature sensor or a mass air sensor of the engine. An adapter is configured to couple the intake tube with the air intake.

An air cleaner assembly includes a precleaner assembly. In one aspect, the precleaner assembly incudes a bypass arrangement that is operated to bypass a portion of air around the precleaner assembly. The bypass arrangement can be operated by a controller based on at least one input signal corresponding to one or more of a vehicle speed, a vehicle engine speed, a vehicle engine load, an operator input, a vehicle location, an air pressure drop across a filter element, an air pressure drop across the precleaner assembly, an acoustic level, a vibration level, a change or cleaning frequency of the filter element, a total number of filter element changes, an identity of the filter element, an identity of the engine, an identity of the vehicle, an air flow rate through the precleaner assembly or through the filter element, and a weather condition parameter identified through data received locally or from a weather service.

The present invention discloses an air cleaner for a vehicle. An air cleaner for a vehicle according to an embodiment of the present invention includes: a housing having an intake port for suctioning air and an outtake port for supplying the air suctioned through the intake port to an engine system of the vehicle; and an element installed in the housing to filter the air suctioned through the intake port, and the air cleaner further includes an evaporation gas collecting unit installed at an upper part of the inside of the housing to collect evaporation gas.