Bendix Commercial Vehicle Systems LLC

Cory J Hamilton

Leonard A Quinn

Mark W McCollough

Richard Beyer

David J Pfefferl

Nicholas Asmis

William Schaffeld

Andras Sipos

Aaron S Wilfing

An apparatus for improving exhaust gas recirculation performance is provided which induces improved exhaust gas recirculation flow during engine operating transients, including transients in which exhaust gas flow conditions are unfavorable. The apparatus includes a fresh air intake passage with a venturi section and an exhaust gas recirculation passage outlet, preferably in the form of a pitot tube, arranged in the fresh air intake passage adjacent to the venturi section such that a pressure-reducing flow in the fresh air is induced as a result of the Coand&#x103; effect. Establishing Coand&#x103; flow adjacent to the exhaust gas recirculation outlet substantially assists in drawing exhaust gas into the fresh air intake flow in transient operating conditions, including unfavorable exhaust-to-intake pressure difference conditions. The Coand&#x103; flow also assists in more rapid and thorough mixing the gases to provide a homogeneous mixture to minimize NOx production during engine operating transients.

Method to enhance gas recirculation in turbocharged diesel engines

A method and controller for controlling the purge cycling of an air dryer assembly is disclosed. The controller includes a control output for transmitting a control signal for controlling the air dryer. The controller is capable of initiating an enhanced purge cycle for the air dryer based on a regeneration volume value. The regeneration volume value is based on the accumulated volume of air delivered to the air dryer for a first time or since a prior standard purge cycle.

Air dryer purge controller and method

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Spencer, OH, United States of America

Cory J Hamilton