A method is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That method includes the step of heating and regenerating the odor absorbent using heat from a heater core of the HVAC system.

Z-filters capable of cleaning particulate matter from airflow streams in dust collectors, including reverse flow, reverse air, and reverse pulse systems.

A honeycomb structure of the present invention includes a honeycomb structure body and a pair of electrode member arranged at a side surface of the honeycomb structure body. The honeycomb structure body has an electrical resistivity of 1 to 200 cm, and the respective pair of electrode members is formed into a band-like shape extending in a direction in which the cells extend. In a cross section perpendicular to the cell extending direction, one of the electrode members is arranged opposite to another of the electrode members sandwiching a center of the honeycomb structure body. One or more of slits, which being open to a side surface, are formed at the honeycomb structure body. At least the one slit is formed so as not to intersect with a straight line connecting center portions of the respective pair of electrode members in the cross section perpendicular to the cell extending direction.

A material pre-separator with an intake side and an outlet side for a particle-contaminated air flow and with several strip-shaped separating elements that are arranged vertically on top of one another, wherein the separating elements are initially arranged from the top toward the bottom with an increasing positive angle relative to the vertical line and at least one lower separating element has a negative angle relative to the vertical line.

An apparatus is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That apparatus includes a regeneration blower assembly that is connected between a heater plenum and a fresh air inlet duct of the HVAC system. Air is drawn from the passenger cabin of the motor vehicle through the heater plenum where that air is warmed. The warmed air is directed through the odor absorbent to remove odors and regenerate the odor absorbent. The warm air and the odors entrained therein is discharged through a fresh air inlet of the HVAC system.

An apparatus is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That apparatus includes a regeneration blower assembly that is connected between a heater plenum and a fresh air inlet duct of the HVAC system. Air is drawn from the passenger cabin of the motor vehicle through the heater plenum where that air is warmed. The warmed air is directed through the odor absorbent to remove odors and regenerate the odor absorbent. The warm air and the odors entrained therein is discharged through a fresh air inlet of the HVAC system.

Air filter and silencers comprise an air filter element having an annular body with openings at opposed ends. A top is attached over one of ends, has an outer flange sealed to the element, and includes a central section extending across the air filter element end. The top central section has a convex-shaped geometry with a radius of curvature projecting outwardly and away from the air filter element. The top central section includes a sound deadening material directed towards the air filter element. The top central section has a radius of curvature greater than the radius of an inside diameter of the air filter element. The air filter and silencer is used with an air filter assembly that includes a housing removably attached to the air filter and silencer, and that has an internal chamber projecting axially into the air filter and silencer with a sound deadening material disposed therein.

A device for exhaust gas treatment in an exhaust system of an internal combustion engine, in particular in a motor vehicle, includes an electrically heatable honeycomb body through which an exhaust gas can flow. The honeycomb body is disposed in a casing tube and has at least one current-conducting structure with electric insulation for voltages greater than 24 V. A current-generating pulsed voltage is applied to the structure to heat the honeycomb body. It is thus possible for heating elements in the exhaust-gas flow to be powered by an on-board electrical system voltage of for example 48 V. A method for operating the honeycomb body is provided with which, even at operating voltages greater than 24 V, the generation of heat in the electrically heatable honeycomb body can be kept in a desired range by adjustment of a pulse width and/or repetition frequency of the pulsed voltage.

An apparatus is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That apparatus includes a regeneration blower assembly that is connected between a heater plenum and a fresh air inlet duct of the HVAC system. Air is drawn from the passenger cabin of the motor vehicle through the heater plenum where that air is warmed. The warmed air is directed through the odor absorbent to remove odors and regenerate the odor absorbent. The warm air and the odors entrained therein is discharged through a fresh air inlet of the HVAC system.

Devices for separating materials from a host fluid are disclosed. The devices include an acoustic chamber having an inlet and an outlet. An ultrasonic transducer and reflector create a multi-dimensional acoustic standing wave in the acoustic chamber that traps the materials and permits a continuous separation of the materials from the host fluid. The materials and the host fluid can thus be separately collected. Multiple sets of trapping lines are generated by the acoustic standing wave, and the transducer is oriented to minimize cross-sectional area for straight vertical channels between the trapping lines.