Patent ID: 7128059
Filing Date: 2006-10-31
Classification: F02D,F02M,Y10T

Abstract:
1. A device comprising: a) an air intake duct; b) at least one, one-way air intake valve disposed in said duct; and c) an actuator coupled to said at least one, one-way valve for biasing said one-way valve in a closed position; d) at least one additional one-way valve in communication with, and disposed between said intake manifold and said vacuum actuator; e) at least one partial leak disposed in said at least one additional one-way valve, wherein said leak is designed to allow pressure to equalize between an inside of said vacuum actuator and a pressure present within said engine intake manifold, wherein said pressure within said intake manifold is equal to atmospheric pressure when said engine is not operating; wherein during operation, said actuator opens said at least one, one-way air intake valve via the presence of a lower pressure in an air intake manifold with respect to atmosphere due to operation of an internal combustion engine positioned downstream from said actuator, and wherein said actuator closes said at least one, one-way air intake valve after said internal combustion engine has stopped operating to prevent emissions of evaporated hydrocarbons from said engine through the air induction system.