Abstract: Systems and methods for operating a hybrid electric vehicle with a passive venturi pump are disclosed. In one example approach, a method comprises: during vehicle motion, passing air through a venturi coupled to the vehicle to generate vacuum; storing the generated in an accumulator; and, in response to a condition, discharging the stored vacuum to a vacuum consuming system of the vehicle.

Abstract: A method and apparatus for a pressurized fuel system with a fuel tank, a fuel fill pipe, and a remotely-controlled lockable fuel opening which selectably seals the pipe entrance. A carbon canister has an inlet for receiving a flow of air and fuel vapors from the tank and has an outlet providing a treated air flow to atmosphere. A fuel tank isolation valve is connected between the air space and the inlet of the carbon canister for selectively allowing pressurization of the fuel tank, wherein the pressurization must be relieved prior to refilling of fuel to the fuel tank. A vacuum pump is coupled to the outlet of the carbon canister, wherein the vacuum pump is configured to activate to increase air flow through the carbon canister from the fuel tank when the fuel tank isolation valve is opened during refilling.

Abstract: A method for operating a fuel system is disclosed. The method includes sequentially purging fuel vapors from each of a plurality of regions of a canister. Purging a region includes opening an air inlet valve associated with that region and maintaining air inlet valves associated with each other region closed to direct fuel vapors to at least one purge outlet.

Abstract: A distensible fuel tank included in a vehicle is provided. The distensible fuel tank includes a housing and a compliance structure coupled to the housing, the compliance structure including a base element coupled to a side of a structural element.

Abstract: A distensible fuel tank included in a vehicle is provided. The distensible fuel tank includes a housing having an exterior surface and a lattice structure coupled to the exterior surface, the lattice structure including a plurality of intersecting wall members, at least two of the plurality of wall members having an unequal thickness.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: Methods and systems are provided for operating a fuel vapor recovery system having a fuel tank isolation valve coupled between a fuel tank and a canister. Fuel vapors are purged from the fuel tank to a canister buffer over a plurality of purge pulses. The pulses are adjusted based on the buffer capacity, a purge flow rate, and a fuel tank pressure to improve control of canister loading and reduce air-to-fuel ratio disturbances.

Abstract: A system for a vehicle is provided herein. The system includes a fuel vapor canister comprising a shell, a compression plate within the shell and an end cap. The end cap includes a double sided spring interface and a double sided shell sealing surface having double sided identical grooves, only one of which is sealed to the shell. The system further includes a spring coupled to the compression plate and only one spring interface.

Abstract: A distensible fuel tank included in a vehicle is provided. The distensible fuel tank includes a housing enclosing a lattice structure substantially spanning a portion of an interior defined by the housing, the lattice structure including a plurality of intersecting wall members, at least two of the wall members having an unequal thickness.

Abstract: A distensible fuel tank included in a vehicle is provided. The fuel tank may include a housing enclosing a lattice structure including at least two intersecting wall members, each wall member including a plurality of panels arranged in a repeating pattern, the plurality of panels having planar sides including a compliance panel having a first and second section configured to fold about a crease line. In this way, multi-directional compliance of the fuel tank can be achieved, while increasing structural integrity.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A distensible fuel tank included in a vehicle is provided. The fuel tank may include a housing enclosing a lattice structure including at least two intersecting wall members, each wall member including a plurality of panels arranged in a repeating pattern, the plurality of panels having planar sides including a compliance panel having a first and second section configured to fold about a crease line. In this way, multi-directional compliance of the fuel tank can be achieved, while increasing structural integrity.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: Methods and systems are provided for operating a fuel vapor recovery system having a fuel tank isolation valve coupled between a fuel tank and a canister. Fuel vapors are purged from the fuel tank to a canister buffer over a plurality of purge pulses. The pulses are adjusted based on the buffer capacity, a purge flow rate, and a fuel tank pressure to improve control of canister loading and reduce air-to-fuel ratio disturbances.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.

Abstract: A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.