Abstract: A vehicle fuel system includes a vapor recovery canister containing at least two carbon beds. Each carbon bed is configured to capture hydrocarbon material associated with fuel vapor discharged from a vehicle fuel tank into the canister.

Abstract: A valve apparatus for use in an interior of a fuel tank, a fuel tank including the valve apparatus, and a motor vehicle including the fuel tank. The valve apparatus includes a substantially flat housing defining a channel between an inlet orifice and an outlet orifice, and a membrane arranged to seal the channel. The membrane is configured to be impermeable to liquid fuel and permeable to fuel vapor.

Abstract: The fuel tank according to the present invention is a fuel tank including a fuel supply device for pressure-feeding fuel to an engine of a vehicle; a fuel vapor treating device configured to enable adsorption of fuel vapor; a fuel tank body which stores the fuel; and a cover material which blocks an opening portion formed in the fuel tank body, wherein an inlet portion to which an inlet pipe for guiding the fuel from a fueling port to the fuel tank body is connected is fixed to the cover material in a state of penetrating the cover material, and a pipe and a wire of the fuel supply device and pipes of the fuel vapor treating device are further fixed to the cover material in a state of penetrating the cover material.

Abstract: A tank ventilation device for a motor vehicle includes a ventilation line, connected on one side to an accumulator for gaseous hydrocarbons and connected on another side via a connection to a filling tube for filling a tank of the motor vehicle, wherein the ventilation line is connected to the tank so that gaseous hydrocarbons which are displaced during refueling are re-circulated toward the connection via the ventilation line, a device for applying a pressure on the ventilation line for carrying out a leakage test of the tank ventilation device, when the filling tube is closed with a closure device, and a float body provided in a region of the connection of the ventilation line to the filing tube for preventing entering of liquid fuel into the ventilation line.

Abstract: A tester and method for testing for a leak in an evaporative-emissions system of a motor vehicle comprise a/an power supply, computer, display communicating with the computer, analog-to-digital board communicating with the power supply and computer, pressure sensor communicating with the board, housing into which the power supply, board, and sensor are integrated, stationary enclosure, and test connection including a hose to the enclosure. A fuel-vapor pressure-rise rate is recorded with an engine of a motor vehicle turned “off.” A value is recorded that directly correlates with an out-gassing effect created by a volume, blend, and temperature of fuel. A “purge” cycle occurs at idling of the vehicle within a short period of time. The engine applies a vacuum to a fuel-delivery system of the vehicle. Vacuum decay is recorded. A leak rate is determined by off-setting the recorded fuel-vapor pressure-rise rate with the recorded vacuum decay.

Abstract: In an internal combustion engine having a turbocharger and a compressor, a discharge point of a tank ventilation system is provided in the intake passage of the internal combustion engine upstream from the turbocharger or the compressor. A Venturi nozzle is situated between the discharge point and a tank venting valve of the tank ventilation system. A defect or a detachment of the line between the Venturi nozzle and the discharge point is detectable with the aid of a change of an adaption value and/or of a correction factor in a control unit of the internal combustion engine or in a computer.

Abstract: Methods and systems for controlling a locking mechanism on a fuel cap for refueling a vehicle are disclosed. In one example approach, a method comprises venting a fuel tank into a vapor absorbent canister in response to a request to refuel and unlocking the fuel cap in response to a predetermined temperature change in said canister.

Abstract: An evaporative emission control system for a plug-in hybrid electric vehicle that indicates the level of loading of a carbon canister of the system. The system has multiple thermocouples positioned space apart from each other along a vapor flow path within the carbon canister. A controller is connected to each thermocouple, which monitors the temperature of the thermocouples. The controller indicates the level of saturation of the carbon canister based on certain pre-determined temperature criteria.

Abstract: A fuel system (1a, 1b, 1c, 1d, 1e, 1f) for a motor vehicle internal combustion engine, having a fuel tank (2) with a fuel vapor venting path (4) containing an activated carbon filter (3), in which a fresh air stream (7) blown or sucked in the direction of the tank venting valve (6) by an independent pump unit (5) arranged close to the activated carbon filter (3) can be made to flow through the activated carbon filter (3), at least at the periphery thereof and, in that case, preferably at the fresh air side to regenerate said filter.

Abstract: The invention relates to a control apparatus for a hybrid system that output engine drive force and electric motor drive force, and selectively performs an engine operation mode in which at least the engine is operated, and an engine operation stop mode in which engine operation is stopped. In cases where release of vaporized fuel captured in a vaporized-fuel capturing/releasing device is required, when the engine is being operated, release of vaporized fuel is started if there is no abnormality in the vaporized-fuel capturing/releasing device, and operation of the engine is continued to release the vaporized fuel until condition for terminating release of the vaporized fuel is satisfied; and in cases where release of the vaporized fuel is required, when the engine is not being operated, operation of the engine is started and release of the vaporized fuel is started if there is no abnormality in the vaporized-fuel capturing/releasing device.

Abstract: A device for ventilating and aerating a fuel tank includes a tank shut-off valve and two tank pressure control valves. One of the tank pressure control valves opens in response to a negative pressure in the fuel tank and the other one of the tank pressure control valves opens in response to an overpressure in the fuel tank. The opening pressures of the two tank pressure control valves are adjustable flexibly and independent of the respective other valve.

Abstract: A method for a vehicle fuel system, comprising: during an engine-off condition, including an ambient temperature within a threshold range, operating a cooling fan to increase a fuel tank vacuum; and indicating leaks in the vehicle fuel system based on the increased vacuum. In this way, an EONV test may be run at mild ambient temperatures which would not otherwise result in the development of adequate fuel tank vacuum to pass the EONV test.

Abstract: An exhaust valve device for a fuel tank includes a casing partitioning an inside into an upper chamber and a lower chamber by a bulkhead including a through hole, an inflow hole communicating the lower chamber and an inside of the fuel tank, an exhaust hole communicating a side portion of the upper chamber and an outside of the fuel tank, and a float valve displaceably supported in the lower chamber. A portion defining the upper chamber of the casing includes a cylinder portion and a circular plate closing an upper end of the cylinder portion. A buffer chamber is defined between the cylinder body and the bulkhead to communicate with the lower chamber by the through hole. In a side wall on a side opposing an exhaust hole side of the cylinder body, a first ventilation hole communicating the buffer chamber and the upper chamber is formed.

Abstract: A device for determining the loading of a fuel vapor accumulator of an internal combustion engine includes: a vibratory mounting of the fuel vapor accumulator; and a sensor for measuring a natural frequency of the fuel vapor accumulator. For determining the loading of a fuel vapor accumulator of an internal combustion engine, a natural frequency of the fuel vapor accumulator mounted vibratorily is measured.

Abstract: A method for supplying vacuum in an engine is disclosed. The method includes controlling a throttle valve positioned upstream of a supercharger arranged in series with and upstream of a turbocharger to draw a fluid from a vacuum line positioned intermediate the throttle valve and a supercharger inlet.

Abstract: Methods and systems are provided for adjusting and diagnosing a position of a fuel tank isolation valve of a fuel system. In one example, a method may include adjusting the fuel tank isolation valve via electrical pulses and tracking a position of the FTIV by counting each of the electrical pulses. When a vacuum is created in the fuel system, the method may include verifying the position of the FTIV based on resulting fuel system pressures.

Abstract: Methods and systems are provided for adjusting and diagnosing a position of a fuel tank isolation valve (FTIV) of a fuel system. In one example, a method comprises adjusting a FTIV of a fuel system by sending an electrical pulse to the FTIV; and comparing a current draw of the FTIV to a known current draw profile to verify the position of the FTIV. In this way, the position of the FTIV may be diagnosed, thereby resulting in increased accuracy of subsequent valve control.

Abstract: Systems and methods for separating higher octane fuel from a fuel mixture are presented. In one example, higher octane fuel is separated from lower octane fuel and allowed to condense in a fuel tank holding higher octane fuel so that parasitic engine losses are not increased by having to separate higher octane fuel from lower octane fuel a second time. The approach may be applied to fuel systems that include multiple fuel tanks storing different types of fuel.

Abstract: A vapor recovery system for an internal combustion engine is provided, the system having a fuel tank containing fuel and vapor that is in select fluid communication with an intake of the internal combustion engine, a compressor, a condensate tank, a condensate composition sensor, and an engine control unit. The engine control unit can be configured to select a desired operating mode for the internal combustion engine and to control the supply of condensate to the intake of the internal combustion engine based on the selected desired operating mode.

Abstract: A method for controlling an engine supplied with multiple fuels in which the vapor purge flow into the engine from multiple vapor storage devices each coupled to a respective, but equal number of multiple fuel tanks controlled to have the same proportion of total vapors purged as a proportion of liquid fuel delivered to the engine from said respective one of the said multiple fuel tanks. The method includes increasing the delivery of fuel from one of the multiple fuel tanks containing fuel with the highest-octane rating of all the fuel tanks when the vapor storage canister coupled to the fuel tank with the highest-octane fuel is not being purged of its fuel vapors. Additionally, the method further comprises a feedback control responsive to an exhaust gas oxygen sensor to adjust said fuel delivered from said multiple fuel tanks to the engine to maintain engine air-fuel ratio around stoichiometry.

Abstract: When fuel tank internal pressure is at a first predetermined pressure P1 or above over a first predetermined time length t1, a fuel tank shutoff valve is opened and a vapor solenoid valve is closed to make piping internal pressure equal to the fuel tank internal pressure. Then, a purge control valve is opened to emit fuel evaporative gas from the fuel tank into an intake passage. When the fuel tank internal pressure is continuously at a second predetermined pressure P2 or below over the first predetermined time length t1, the fuel tank shutoff valve is closed, and when accumulated volume in high-pressure purge finishing phase reaches a second predetermined volume iv2 or above, the vapor solenoid valve is opened. When the accumulated volume in high-pressure purge finishing phase reaches a first predetermined volume iv1 or above, the purge control valve is opened and the engine is stopped.

Abstract: A canister arrangement structure in a fuel vapor recovery device includes a canister that has built therein an adsorbent for adsorbing fuel and temporarily collects fuel vapor generated in a fuel tank of an internal combustion engine, the canister is arranged between an exhaust pipe of the internal combustion engine and the fuel tank.

Abstract: A fuel system, in particular of a motor vehicle, includes a fuel tank and a ventilation device for ventilating the fuel tank, wherein the ventilation device has at least one separation device which has a temporary accumulator for liquid fuel and a fuel delivery device which is configured as jet pump for delivering fuel out of the temporary accumulator. In an operating medium line of the jet pump a pressure reducing element or a pressure adjustment element is provided.

Abstract: A gas mixer for mixing a first gas and a second gas, including a gas housing, a Venturi tube, a flow body for the first gas arranged in the Venturi tube to form a mixing gap, an inflow tube connected to the Venturi tube, to an inflow opening to the Venturi tube for the second gas, and an actuating element for varying the inflow cross section of the inflow opening. The actuating element has a first and a second actuating part which restrict the inflow cross section. The first actuating part is a first gas housing part and the second actuating part is a second gas housing part. At least one of the gas housing parts forms part of the Venturi tube and/or of the inflow tube At least one of the gas housing parts can be moved with respect to another and has a rotor of a linear motor.

Abstract: Methods and systems for cleaning a pressure relieve valve for a fuel tank are disclosed. In one example approach a method for cleaning a pressure relief valve that is normally activated at a preset negative pressure in a fuel system comprises, during a test cycle, reducing fuel system pressure to a predetermined pressure which is higher than the preset pressure, and measuring pressure changes in the fuel system; and when not in the test cycle, periodically reducing the fuel system pressure to a third pressure which is less than said preset pressure.

Abstract: Methods and systems for detecting a refueling event for diagnostics are disclosed. In one example approach a method comprises discontinuing leak diagnostics in response to a temperature change in a fuel vapor canister coupled to a fuel tank in an emission control system while the leak diagnostics are being performed in the emission control system.

Abstract: One aspect of the present teachings includes a separation membrane arranged in a hollow case. A particular component concentration chamber and a particular component dilution chamber are arranged in series in the hollow case. The particular component concentration chamber is capable of increasing concentration of the particular component by allowing permeation of the particular gas through the separation membrane. The particular component dilution chamber is capable of increasing concentration of the particular component by not allowing permeation of the particular gas through the separation membrane. The particular component concentration chamber and the particular component dilution chamber are configured such that only a gas containing the particular component and permeated through the separation membrane or only a gas containing the particular component not permeated through the separation membrane in one of the chambers disposed on an upstream side (i.e.

Abstract: In a vehicle that runs by drive power of a motor in addition to that of an engine, a device for treating evaporated fuel is provided that may heat a canister and improve desorption efficiency even in a state in which there is little exhaust heat from the engine. A vehicle is provided with a first battery and a second battery. A canister is disposed in front of the first battery and below the second battery. Because the canister is disposed near to the batteries, heat is transferred from the batteries to the canister and an adsorbing agent in the canister is heated.

Abstract: A deflector mounts a carbon scrubber element at an atmospheric port of an evaporative emissions canister. A substantially cylindrical shell has an open end and a closed end. A spacer plate extends outwardly from the shell. An elastomeric ring is overmolded within the shell at a longitudinal position between the ends. The elastomeric ring has an inner diameter configured to sealingly receive the carbon element. A plurality of vapor apertures are formed in the shell between the spacer plate and the elastomeric ring. A plurality of elastomeric ribs are overmolded by the interior surface within the shell the vapor apertures and the closed end, and are configured to be spaced around the carbon element to suspend the carbon element spaced away from the shell without blocking a gaseous flow from the vapor vents to the carbon element.

Abstract: A charge pipe passage includes a first tank-side pipe passage part which is connected to an upper surface of a fuel tank, and a second tank-side pipe passage part which is connected with the first tank-side pipe passage part and extends toward the other side of the fuel tank from one side of the fuel tank in the vehicle widthwise direction on an end portion thereof on a fuel tank side, and the first and second tank-side pipe passage parts, are fixed to the upper surface of the fuel tank.

Abstract: Methods and systems for purging a hydrocarbon trap in an engine intake in a vehicle are disclosed. In one example approach, a method comprises during an engine off condition, operating a pump in a purge line coupled to a fuel vapor canister in an emission control system to deliver fuel stored in a hydrocarbon trap in an intake of the engine to the fuel vapor canister.

Abstract: A liquid fuel trap device for a vehicle fuel system includes a housing forming a confined space and including an outlet port connectable to a fuel vapor recovery system via a fuel vapor passage; and a valve capable of discharging liquid fuel from the confined space into a fuel tank. The housing includes at least two retention devices adapted to impede fuel in the housing from reaching the outlet port in angled positions of the housing.

Abstract: A filter box assembly for integrating into a bi-directional vent and air intake line associated with a vehicle fuel tank. The assembly includes an outer shell having an open inserting end and an opposite closed end. An inner communicable component is engageable within the open inserting end of the outer shell and collectively defines a plurality of continuous and reverse flow passageways extending between a plurality of inlet apertures defined upon a base surface of the inner component and a conduit attachment nipple extending from the inner component.

Abstract: A motor vehicle has an internal combustion engine (1) that is supplied with fuel from a fuel tank (4). A regeneratable filter device (6) is associated with the fuel tank (4) and can be connected to a vacuum storage device (20) for purging the filter device (6). To simplify and/or improve the regeneration of the filter device, the vacuum storage device (20) is arranged outside an intake tract of the internal combustion engine (1) and is associated with the fuel tank (4).

Abstract: A system for containing liquid and venting vapor includes a liquid containment tank having an interior space. A first conduit is external to and operatively connected with the tank. The first conduit has a first internal passage fluidly communicable with the interior space. A second conduit is external to the tank, and has a second internal passage. A liquid vapor discriminating (LVD) valve is external to the tank and has a housing defining an inlet connected to the first conduit, an outlet connected to the second conduit, and an internal housing cavity. The valve includes a membrane filter positioned in the internal housing cavity between the inlet and the outlet. The membrane filter is configured to prevent the passage of liquid through the membrane and allow the passage of vapor through the membrane.

Abstract: Systems and methods for a multi-path purging ejector are disclosed. In one example approach, a multi-path purge system for an engine comprises an ejector including a restriction, first and second inlets, and an outlet, and a shut-off valve hard-mounted to an intake of the engine and coupled to the outlet.

Abstract: A drop separator for the bleeding line of a fuel container, comprising a drop separator housing that is connected to a space surrounded by the filler tube of the fuel container, preferably directly to the refueling channel of the filler tube, and at least two bleeding line connections, wherein the housing is divided by at least one partition into at least two separate gas paths, wherein a first gas path is designed as a gas inlet channel and a second gas path as a gas outlet channel. The gas inlet channel is closed on the end face by a lid and communicates via a passage of a surrounding wall of the drop separator housing with the filler tube.

Abstract: A charge pipe passage includes a second pipe passage part which is connected to a fuel tank by way of a first pipe passage part and extends toward the other side from one side in the vehicle widthwise direction, and a third pipe passage part which is communicably connected with the second pipe passage part on the other side in the vehicle widthwise direction and has a highest part arranged at a highest position of the charge pipe passage at an intermediate position thereof. A first check valve is interposed on the third pipe passage part downstream of the highest part, an atmospheric air introducing pipe passage is connected to the third pipe passage part upstream of the first check valve, and a second check valve is interposed on the atmospheric air introducing pipe passage at a position higher than the highest part.

Abstract: The invention relates to a method for operating a fuel system (1) of an internal combustion engine, wherein the fuel system (1) has a fuel tank (2) and a ventilation device (3) having at least one ventilation valve (9, 17) for ventilating the fuel tank (2) in the direction of a device (6, 16) that generates a negative pressure, at least intermittently. According to the invention, the magnitude of deformation caused by an internal pressure of the fuel tank (2) of a deformation area (18) of the fuel tank (2) is measured and, if the magnitude of deformation exceeds a threshold, the ventilation valve (17) is closed and/or a bypass (22) is opened. The invention further relates to a fuel system (1) of an internal combustion engine.

Abstract: An emissions control system is provided that comprises a fuel tank, a hydrocarbon filter element, and a three-way valve coupled between the hydrocarbon filter element and the atmosphere. The three-way valve is comprised of three ports, a purge port, a reference port, and a sealed port, and enables identification of degradation of the emissions control system. The arrangement of the ports on the valve enables a simplified testing method that reduces background errors caused by transitioning between various operating positions.

Abstract: An evaporative emissions control system for reducing the amount of fuel vapor emitted from a vehicle includes a canister containing a sorbent material and a cartridge heater disposed at least partially within the canister in direct contact with the sorbent material. Electrical terminals for applying power to a heating element within the heater are disposed external to the canister. At least one heat sink may be included within the canister in direct contact with the heater. A method of manufacturing an evaporative emission control system that includes a cartridge heater disposed in a canister is also presented.

Abstract: A vapor management system (10) includes a sense tube (47) disposed in a fuel tank (12). A differential pressure sensor (17) has one side connected to the sense tube and another side connected to a vapor cavity so that the pressure sensor can measure a differential pressure (DP) between a volume of the vapor cavity and a volume of the sense tube containing liquid fuel. A temperature sensor (26) is in the vapor cavity. A processor 1) receives DP and T measurements at certain time intervals to determine the temperature at time zero (T0), the differential pressure at time zero (DP0), the temperature at a certain time (Tt), and the differential pressure at a certain time (DPt), and 2) when (Tt?T0) is greater than a certain value, compares DPt to a certain differential pressure value.

Abstract: Methods and systems are provided for operating an engine to generate vacuum for a subsequent leak detection routine. During a selected key-off condition, a starter motor is operated to spin the engine unfueled and generate intake vacuum for the leak detection. Fuel vapors drawn during the spinning are stored in an auxiliary canister that is purged along with a main canister during purging conditions.

Abstract: A method is provided for operating a hybrid vehicle (1) having an internal combustion engine (2) and an electric machine (4) that can be used individually or jointly to drive at least one axle (9, 10) of the hybrid vehicle (1) by connecting a clutch (15), and having a regeneratable filter device that takes up fuel vapors from a fuel tank of the internal combustion engine (2). To improve the comfort in a purely electric driving mode and/or to improve the reproducible operation of a hybrid vehicle during a special exhaust gas test, in a purely electric driving mode in which the hybrid vehicle (1) is driven only by the electric machine (4), the internal combustion engine (2) is switched on with the clutch (15) open to regenerate the filter device.

Abstract: A compression ignition dual fuel engine supplies natural gas fuel and liquid diesel fuel to each engine cylinder from a common fuel injector. Each fuel injector is fluidly connected to both a liquid fuel common rail and a gaseous fuel common rail. The engine includes a surplus gas system for capturing surplus gas, such as evaporated gas from the gaseous fuel supply and pressure control system, or left over pressurized natural gas produced by engine shut down. Rather than being vented to atmosphere, the surplus gas can be burned in the engine when operating conditions present burn opportunities.

Abstract: During operation of an internal combustion engine system which has at least one sensor for measuring a hydrocarbon content of a gas stream in a line, a temperature is determined at the at least one sensor. If the temperature is greater than a prespecified temperature, the flow of gas through the line is interrupted.

Abstract: A vent valve assembly includes a first housing component, a second housing component, and a third housing component, as well as a first valve and a second valve. The first, second, and third housing components are configured to assemble together along one directional axis with the second housing component, the first valve and the second valve between the first and third housing components and with the second valve laterally-spaced from the first valve. The assembled first, second, and third housing components define a nonlinear vapor flow path that redirects vapor from the first valve to the second valve, thereby reducing an overall height of the vent valve assembly.

Abstract: A leakage diagnosis device can determine whether or not leakage occurs from a fuel vapor processing apparatus by comparing a diagnosis criterion, such as a reference pressure set for diagnosing leakage, with an internal pressure of a process system of the fuel vapor processing apparatus during application of a negative or positive pressure to the process system. The diagnosis criterion has a device that can correct the diagnosis criterion based on a fuel vapor pressure within the process system.

Abstract: A system for venting vapors from a fuel tank of an engine, an engine with such a system, and related methods are disclosed. In one embodiment, such a system includes a coupling device having first, second, and third ports that are connected at a junction, where the first and second ports are respectively configured to be at least indirectly coupled to the tank and a carburetor, respectively, and where the third port is in communication with an outside environment via a filter. The system further includes an obstruction that is formed at a location downstream of the junction en route toward the carburetor, the location being either within the coupling device or at a position downstream of that device, such that at least some of the vapors can proceed from the tank to the carburetor and at least some air from the environment is able to proceed toward the tank.

Abstract: A refueling device (1) for refueling a fuel tank (2) of an internal combustion engine (3) in a motor vehicle (4) has a filler connector (5) for feeding fuel to the fuel tank (2). An integrated fuel feed device (10) feeds the fuel from the filler connector (5) to the fuel tank (2).