A hydrocarbon (HC) trap positioned in an intake conduit of an engine is provided. The HC trap includes a stack of consecutively layered polymeric sheets with at least a portion of the sheets impregnated with a HC vapor adsorption/desorption material, the stack of sheets extending from a first exterior surface to a second exterior surface.

Methods and systems are provided for managing fuel vapor in a vehicle evaporative emissions system configured with a fuel vapor canister for capturing and storing vapors from a vehicle fuel tank. In one example, a three-way valve is positioned between the fuel vapor canister and atmosphere, and may function during engine-off conditions to direct fuel tank vapors through the fuel vapor canister where they may be adsorbed, and then to an intake manifold of the engine where a second adsorbent for capturing and storing fuel vapors is positioned. In this way, fuel vapors that are not adsorbed by the fuel vapor canister, or fuel vapors that are freed from the canister during engine-off conditions may be routed to the second adsorbent prior to exiting to atmosphere, thus reducing undesired bleed emissions.

A vehicle air cleaner is configured to improve the capability of a hydrocarbon trap mounted in a case to collect hydrocarbons. The vehicle air cleaner includes a case having an inlet port, through which external air is introduced, and an outlet port, through which filtered air is discharged, a filter assembly provided in a first space of an internal space in the case to filter the external air introduced through the inlet port and to remove foreign substances from the external air, and a hydrocarbon trap provided in a second space of the internal space in the case, through which the air filtered through the filter assembly flows, to collect hydrocarbons in the second space.

The present invention discloses an air cleaner for a vehicle. An air cleaner for a vehicle according to an embodiment of the present invention includes: a housing having an intake port for suctioning air and an outtake port for supplying the air suctioned through the intake port to an engine system of the vehicle; and an element installed in the housing to filter the air suctioned through the intake port, and the air cleaner further includes an evaporation gas collecting unit installed at an upper part of the inside of the housing to collect evaporation gas.

Methods and systems are provided for a hydrocarbon (HC) trap system in an engine air induction system. In one example, a system may include a pillow-case type HC trap housed in a rectangular opening formed in a wall of an air conduit at the outlet of an air cleaner box. A frame may be integrally formed around the opening to support the HC trap protruding outward from the wall.

A hydrocarbon absorbing air filter box is provided for absorbing evaporative hydrocarbon emissions from an air intake duct of an internal combustion engine. A combined mass airflow sensor and hydrocarbon trap comprising the hydrocarbon absorbing air filter box includes a duct supporting a hydrocarbon absorbing sheet within an interior of a housing. The duct communicates an airstream from an air filter to the air intake duct during operation of the internal combustion engine. An opening in the housing receives a mass airflow sensor into the duct, such that the mass airflow sensor is disposed within the airstream. Guide vanes extending across the duct reduce air turbulence within the airstream passing by the mass airflow sensor. Ports disposed along the duct allow the evaporative hydrocarbon emissions to be drawn into the interior and arrested by the hydrocarbon absorbing sheet when the internal combustion engine is not operating.

An air cleaner for vehicles includes: a case having an inlet, through which outside air is introduced, and an outlet, through which filtered air is discharged; and a filter installed in an inner space of the case, configured to filter the outside air introduced through the inlet, and including a filtration member, wherein the filtration member is formed in an “∩” shape open downwards and is configured to allow the outside air to pass therethrough in a downward direction and in a lateral direction.

A method for operating an oxycombustion engine system includes passing a nitrogen-depleted gas, a fuel, and a recycled exhaust gas into a combustion chamber, combusting a mixture of the nitrogen-depleted gas, the fuel, and the recycled exhaust gas, thereby producing an exhaust gas including carbon dioxide, detecting a pressure of the recycled exhaust gas passed to the combustion chamber, determining whether the detected pressure of the recycled exhaust gas is less than a configurable pressure threshold, and in response to determining that the detected pressure of the recycled exhaust gas is less than the configurable pressure threshold, increasing the pressure of the recycled exhaust gas passed to the combustion chamber.

The concepts described herein provide for a method, apparatus and system to monitor and control a fuel vapor capture system that is disposed in an air intake system of an internal combustion engine for evaporative emission control. This includes an air intake system for an internal combustion engine that includes a fuel vapor capture system disposed in an interior portion of the air intake system, the fuel vapor capture system including a Metal Organic Framework (MOF) material that is configured to adsorb and desorb hydrocarbon vapor and a controllable device that is integrated into the fuel vapor capture system. In one embodiment, the MOF material is a flexible MOF material.

Methods and systems are provided for a hydrocarbon (HC) trap system in an engine air induction system. In one example, a system may include a pillow-case type HC trap housed in a rectangular opening formed in a wall of an air conduit at the outlet of an air cleaner box. A frame may be integrally formed around the opening to support the HC trap protruding outward from the wall.