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E.i. Dupont De Nemours and Company

Design Technology and Innovation Limited

Mark Elden Schuchardt

Mark Christopher Tonkin

Mark Andrew Young

Karl U Ingard

Terrence A Dear

Water vapor is introduced into an inlet air stream () of an engine (), for example, by a pervaporation process through a non-porous hydrophilic membrane (). A water reservoir (), which can contain contaminated water, provides a vapor pressure gradient across the hydrophilic membrane () into the inlet air stream (), while the rate of delivery of the water vapor to a cylinder (-) is self-regulated by the rate of flow of air across the membrane. The hydrophilic membrane () therefore also filters the water from the water reservoir () to an extent that pure water vapor is provided to the air inlet stream (). Delivery of water vapor can nevertheless be controlled using a hood () that slides over the hydrophilic membrane to limit its exposed surface area. Alternatively, water vapor is introduced into one or more of the gas streams of a fuel cell by separating the gas stream from the wet exhaust gas stream by a hydrophilic membrane such that moisture passes across the membrane to moisten the gas stream and thereby prevent drying out of the proton exchange membrane.

Humidifying gas induction or supply system

Water vapor is introduced into an inlet air stream ( ) of an engine ( ), for example, by a pervaporation process through a non-porous hydrophilic membrane ( ). A water reservoir ( ), which can contain contaminated water, provides a vapor pressure gradient across the hydrophilic membrane ( ) into the inlet air stream ( ), while the rate of delivery of the water vapor to a cylinder ( ) is self-regulated by the rate of flow of air across the membrane. The hydrophilic membrane ( ) therefore also filters the water from the water reservoir ( ) to an extent that pure water vapor is provided to the air inlet stream ( ). Delivery of water vapor can nevertheless be controlled using a hood ( ) that slides over the hydrophilic membrane to limit its exposed surface area. Alternatively, water vapor is introduced into one or more of the gas streams of a fuel cell by separating the gas stream from the wet exhaust gas stream by a hydrophilic membrane such that moisture passes across the membrane to moisten the gas stream and thereby prevent drying out of the proton exchange membrane.

A silencer having multiple integrated channels arranged in a labyrinth configuration is provided. The channels have one open end and one closed end with the open end in communication with a common zone which is connected to a flow duct. The channels are tuned to provide a selected resonance frequency.

Growing community of inventors

Pleasant Ridge, MI, United States of America

Mark Elden Schuchardt