Patent ID: 8156924
Filing Date: 2012-04-17
Classification: F02M

Abstract:
1. An evaporative emissions system for regulating a purge flow rate in an internal combustion engine, the system comprising: an air intake assembly for providing a mixture of intake air and fuel to the internal combustion engine; an evaporative emissions control device having a first port and a second port and for purging fuel vapors, the evaporative emissions control device in fluid communication with the air intake assembly; a fuel tank assembly for providing fuel to the air intake assembly, the fuel tank assembly in fluid communication with (i) the first port of the evaporative emissions control device and (ii) the air intake assembly; and a flow control device for regulating a purge flow rate of the evaporative emissions control device, the flow control device being at least indirectly connected between the second port of the evaporative emissions control device and the air intake assembly; wherein the flow control device includes at least one of an orifice and a passageway that is sized in relation to at least one of the evaporative emissions control device and the fuel tank assembly; wherein all fuel vapors directed from the evaporative emissions control device to the air intake assembly pass through the flow control device; and wherein the at least one of an orifice and passageway remains open during regulating of the purge flow rate of fuel vapors between the evaporative emissions control device and the air intake assembly.