Massachusetts Institute of Technology

Federal-mogul Corporation

Victor Wong

Alexander Georg Sappok

Leslie Bromberg

Airton Martins

Peter Koert

Ronald Parker

Andy Taylor

Claes Frennfelt

John Durham

Derek Mackney

Sean McGrogan

Tian Tian

Alex Sappok

Andrew Taylor

A system and method for controlling the operation of a particulate filter is disclosed. The objective of this control system is to manipulate the properties and spatial distribution of contaminant material accumulated in filters to reduce filter pressure drop and associated deleterious impacts of the contaminant material on filter performance.

Particulate filter control system and method

Methods for generating and applying coatings to filters with porous material in order to reduce large pressure drop increases as material accumulates in a filter, as well as the filter exhibiting reduced and/or more uniform pressure drop. The filter can be a diesel particulate trap for removing particulate matter such as soot from the exhaust of a diesel engine. Porous material such as ash is loaded on the surface of the substrate or filter walls, such as by coating, depositing, distributing or layering the porous material along the channel walls of the filter in an amount effective for minimizing or preventing depth filtration during use of the filter. Efficient filtration at acceptable flow rates is achieved.

Method for reducing pressure drop through filters, and filter exhibiting reduced pressure drop

A piston and internal combustion engine therewith constructed in accordance with the present invention has a piston body with an upper crown having a substantially cylindrical outer surface depending from a top surface along a central axis. At least one annular ring groove extends radially into the outer surface to provide a top land extending from the ring groove to the top surface. A plurality of waves are formed circumferentially about the top land. Each of the waves has a valley extending radially into the outer surface of the top land and extending from the top surface to the ring groove. The waves traverse from the top surface to the ring groove and are configured in substantially non-overlapping relation with one another and in a predetermined orientation relative to at least one of a fuel spray stream, a pin bore axis or a thrust axis of the piston.

Piston and internal combustion engine therewith and method of constructing the piston

Method for determining loading of a filter. The filter has a first dielectric constant. The filter becomes loaded with contaminant material that has a second dielectric constant. The filter, such as a diesel particulate filter, is contained within a metallic enclosure forming a microwave cavity. The method includes establishing microwave energy in the cavity and monitoring changes in the cavity microwave response, the changes being related to filter loading.

Microwave sensing for determination of loading of filters

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Peabody, MA, United States of America

Victor Wong