An apparatus and a method are provided for an air filter cleaning wand for flushing contaminants from an intake air filter of an automobile engine. The air filter cleaning wand comprises a proximal flange, a conduit, and a distal end portion. The proximal flange is configured to receive a nozzle of a water hose. An interior of the conduit is in fluid communication with the proximal flange. The distal end portion comprises a plurality of longitudinally aligned vents in fluid communication with the interior of the conduit. Upon passing water through the water hose and into the conduit, pressurized water streams exit the vents along the distal end portion so as to flush contaminants from the air filter. The air filter cleaning wand advantageously is comprised of a material which is sufficiently durable and temperature resistant to retain its configuration during operation when coupled to pressurized water sources.

In one aspect, an aspiration system for a work vehicle includes an exhaust tube extending along a flow direction and an aspiration tube in flow communication with the exhaust tube at an aspiration zone of the exhaust tube such that the aspiration tube is configured to receive an aspirated airflow. The system also includes an airflow area modifier provided in operative association with the aspiration zone and actuatable to adjust a cross-sectional flow area of the exhaust tube within the aspiration zone. The system includes an actuator provided in operative association with the airflow area modifier such that the actuator is configured to alter an orientation of the airflow area modifier such that the cross-sectional flow area of the exhaust tube within the aspiration zone is adjusted.

An air filter for heavy dust conditions has an efficient scavenging system. The air filter includes: a housing, a permeable filter, and a scavenger system. The scavenger system disposes of particles collected on the upstream surface of the permeable filter. The scavenger system includes: an air suction source, and a shutter. The shutter is positioned substantially along, typically below, the permeable filter, at a certain distance from a wall, typically the bottom wall, of the housing. The air suction source draws air from a collecting space located between the shutter and the wall of the housing. The shutter is being selectively operated to permit or restrict passage there-through. The air suction source efficiently operates to scavenge particles from the collecting space when the passage through the shutter is at least partially restricted.

Assemblies, features, and techniques for pulse jet air cleaner assemblies and their operation are described. Techniques described include methodology and equipment for preferred pulse jet sequencing and operation.

A system and method of operating an air cleaner assembly including a selective scavenging apparatus that may be configured to actuate in response to a pulse cleaning operation. The air cleaner assembly may include an air cleaner housing, filter media positioned within an interior space of the air cleaner housing, a pulse cleaning apparatus extending into the interior space, and the selective scavenging apparatus in fluid communication an egress aperture of the air cleaner housing. The selective scavenging apparatus may be configured to move fluid and sediment out of the air cleaner housing during a scavenging time period and the pulse cleaning apparatus may be configured to direct a pulse of gas into the clean air space during a cleaning operation. The scavenging time period may start based on the beginning of the cleaning operation and may end based on the completion of the cleaning operation.

An engine air filter for heavy dust conditions such as used in heavy military and off-road vehicles, including a scavenging system, and a method of operation thereof. The air filter includes: a housing, a precleaner, a permeable filter, and a scavenger system. The scavenger system disposes of particles collected at the precleaner and on the upstream surface of the permeable filter. The scavenger system includes: an air suction source and a three way valve. The three way valve is airflow coupled to the precleaner, to the permeable filter and to the air suction source. The three way valve enables scavenging of the precleaner and the permeable filter alternately. Optionally, the air filter may further includes a pulse jet back-flow flush system.

A centrifugal air filter for an automotive system includes a plurality of single separators for setting an air flow passing therethrough in a turbulent motion and a separation area surrounding the plurality of single separators. The separation area receives particles from the air flow due to the centrifugal forces. A filter housing portion is located below a predefined or operation position for receiving particles from the air flow due to gravity, and an intake pipe is connected by an extraction line to a connecting pipe emerging on a filter housing and opening into the filter housing portion.

A compressor arrangement for an internal combustion engine, having a compressor which is arranged in a compressor housing and has a low pressure side and a high pressure side, and having a negative pressure provision unit, which has a propellant channel that is fluidically connected, on the one hand, via a propellant inlet fitting to the high pressure side of the compressor and, on the other hand, via a propellant outlet fitting to the low pressure side of the compressor and has a nozzle, and which has a negative pressure channel opening into the propellant channel fluidically between the propellant inlet fitting and the propellant outlet fitting.

A filter device is provided with a filter housing and a filter element arranged in the filter housing. The filter element is provided with an annular filter medium body that has an inflow side. The filter housing has a dirt collecting region in flow communication with the inflow side of the annular filter medium body. The dirt collecting region has an annular circumferentially extending configuration. A flow-tight separation element is arranged at or adjacent to the annular filter medium body. The dirt collecting region adjoins the flow-tight separation element. An inflow region is positioned at the inflow side of the annular filter medium body and immediately adjoins the dirt collecting region. The dirt collecting region has a radial extension relative to a longitudinal axis of the annular filter medium body, and the radial extension of the dirt collecting region is larger than a radial extension of the inflow region.

A pulse ring assembly for air cleaner systems that is adapted to produce a pulse ring of gas to clean a filter element. The air cleaner system may include an outer tube and an inner tube configured to receive the inner tube such that at least a portion of an interior surface of the outer tube faces at least a portion of an exterior surface of the inner tube. The outer tube may include a pulse port extending between the interior and exterior surfaces of the outer tube into an outer tube passageway. Filtered air may be configured to flow from a first filter cartridge, through the outer and inner tubes, and to an engine intake. The system may also include a pulse jet apparatus in fluid communication with the pulse port of the outer tube and configured to direct gas through the pulse port towards the first filter cartridge.