Abstract: An engine device is provided with a fuel vapor processor comprising a first supply pipe configured to supply a vaporized fuel gas including fuel vapor generated in the fuel tank, to a downstream side of the compressor in the intake pipe; a first valve provided in the first supply pipe; a second supply pipe configured to supply the vaporized fuel gas to an upstream side of the compressor in the intake pipe; a second valve provided in the second supply pipe; and a buffer portion provided on an intake pipe side of the second valve in the second supply pipe and configured to adsorb at least part of the fuel vapor.

Abstract: An evaporated fuel processing may include: a canister disposed on a purge passage; a control valve disposed on the purge passage between an intake passage and the canister and switching between communication and cutoff states, the communication state where the canister and the intake passage communicate through the purge passage, and the cutoff state where communication between the canister and the intake passage is cut off on the purge passage; a pressure detector detecting a pressure in the purge passage on a canister side relative to the control valve; and a determining unit determining whether clogging is occurring in the purge passage between the control valve and the intake passage by using a difference between a pressure under the communication state and a pressure under the cutoff state that are detected by the pressure detector while the control valve repeatedly switches between the communication state and the cutoff state.

Abstract: A tank venting system (14) for a motor vehicle (10) has a filter (16) to filter a venting gas (15) of a fuel tank (12) of the motor vehicle (10), a pump (25) to generate a flushing air stream (29) in order to flush the filter (16), and a control unit (30) that, for purposes of performing a leak test, is configured to detect a pressure signal (34) that is dependent on the gas pressure (P) present in the fuel tank (12) and to check whether the pressure signal (34) meets a prescribed leakage criterion (33). The pump (25) is fluidically interconnected between the filter (16) and a shut-off valve (26), whereby the shut-off valve (26) is configured to fluidically couple the pump (25) to an inlet site (27) of a fresh air system (19) of an internal combustion engine (11) of the motor vehicle (10), and whereby the control unit (30) is configured to operate the pump (25) for flushing the filter (16) as well as for performing the leak test.

Abstract: A method for detecting defective gas flow in a vent line of a device for purging a fuel vapor absorption filter of a vehicle's internal combustion engine during filling the vehicle's tank with fuel from a filler nozzle having a venturi effect duct, so as to stop the filling when the duct is full of fuel. The vent line connecting the fuel tank to the filter. The tank having: a filler pipe, at the end of which is a stopper designed so that, during filling with fuel from the filling nozzle, fuel vapors are evacuated through the vent line. At least one gauge measures fuel volume in the tank. The detection method continuously measuring the volume of fuel in the tank during filling and comparing a volume profile thus measured with respect to time against a predetermined volume profile. A defective flow detected if the two profiles do not match.

Abstract: An evaporation gas active purge system may include a purge line of connecting a canister for absorbing an evaporation gas of a fuel tank to an intake pipe; a purge pump mounted on the purge line; a purge valve mounted on the purge line to be disposed between the purge pump and the intake pipe; a pressure sensor mounted on the purge line to be disposed between the purge pump and the purge valve; and a control unit of receiving a signal from the pressure sensor, and transmitting an operating signal to the purge pump and the purge valve, wherein the control unit controls the purge pump and the purge valve by an engine condition and a vehicle speed.

Abstract: In a purge control valve device, a purge valve includes a first electromagnetic valve and a second electromagnetic valve which are provided inside a housing. The first electromagnetic valve has a first valve body that controls a flow rate of evaporative fuel flowing in the housing. The second electromagnetic valve has a second valve body that controls a flow rate of evaporative fuel flowing in the housing. The upstream passage and the downstream passage are arranged in series. The first electromagnetic valve switches a seated state and an unseated state of the first valve body. The purge valve has a narrowed passage in which a flow rate of the evaporative fuel is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state.

Abstract: A purge system for fuel evaporation gas may include an ejector, having a nozzle configured to allow driving fluid to pass therethrough, a driving inlet through which the driving fluid is supplied into the ejector, a suction inlet through which purge gas including a fuel component is drawn as suction fluid from a canister into the ejector, a diffuser outlet through which a mixture of the driving fluid that has passed through the nozzle and the drawn purge gas is discharged out of the ejector, and a suction passage extending from the suction inlet toward a downstream side of the nozzle based on a flow direction of the driving fluid, and a bypass passage coupled from the suction inlet to the driving inlet.

Abstract: An evaporated fuel processing apparatus includes a canister to collect vapor generated in a fuel tank, a purge passage to purge vapor into an intake passage from the canister, a purge pump provided in the purge passage, a first trifurcated valve in the purge passage between an exhaust port of the purge pump and an outflow port of the purge passage, a second trifurcated valve provided in the purge passage between an inflow port of the purge passage and an intake port of the purge pump, a first bypass passage between the purge passage upstream of the second trifurcated valve and the first trifurcated valve, and a second bypass passage between the purge passage downstream of the first trifurcated valve and the second trifurcated valve. Passages for the vapor and others are switched by switching the first trifurcated valve and the second trifurcated valve during operation of the purge pump.

Abstract: A method of diagnosing an engine purge system includes: obtaining, by a controller, a first measurement value by measuring a pressure of a secondary purge line when a boosting pressure from a compressor is greater than or equal to a predetermined reference pressure; obtaining, by the controller, a second measurement value by measuring a pressure of the secondary purge line while opening and closing a purge control solenoid valve when a throttle valve is deployed; determining, by the controller, whether at least one of the secondary purge line or a recirculation line is blocked by comparing the first measurement value and the second measurement value; and providing, by the controller, an alert when it is determined that at least one of the secondary purge line or the recirculation line is blocked.

Abstract: Embodiments of the present disclosure are directed to a vent monitoring system that includes a first sensor configured to provide feedback indicative of an amount of a substance accumulated in the vent, a second sensor configured to provide feedback indicative of a temperature in the vent, and a control system communicatively coupled to the first sensor and the second sensor, where the control system is configured to generate a notification when the feedback from the first sensor exceeds a first target level and when the feedback from the second sensor exceeds a second target level.

Abstract: Methods and systems are provided for providing improving customer satisfaction during a vehicle fuel tank refueling event. A fuel system is configured with a three-way isolation valve and a four port canister. Fuel tank depressurization is expedited by directing fuel tank vapors to a dedicated depressurization port of the canister.

Abstract: Methods and systems are provided for reducing engine stall incidence during canister purging. A fuel vapor canister is purged at a higher purge ramp rate to an engine with one or more cylinders selectively deactivated. In response to an indication of potential or partial engine stall, the deactivated cylinders are reactivated and the canister purge ramp rate is lowered.

Abstract: A valve device includes an outflow port inserted in an engine port provided on an intake pipe so as to communicate with an intake passage. A leak port is inserted in the engine port and includes a leak passage into which evaporative fuel is allowed to flow regardless of a permitting state and a blocking state. A seal provides a sealed state between the outflow port and the engine port. Another seal provides a sealed state between the leak port and the engine port. The seal is positioned such that the sealed state of the seal becomes broken before breakage of the other seal when the outflow port and the leak port move in a direction away from the engine port.

Abstract: The evaporated fuel treatment device includes: a canister that adsorbs evaporated fuel generated within a fuel tank that is provided to a vehicle; a vapor passage that connects the canister and the fuel tank; a shutoff valve capable of closing off and opening up the vapor passage. When a specific event by which a current position of the shutoff valve becomes unknown occurs and initialization processing has become necessary, a first process is performed in which the shutoff valve is operated by a first operating amount that is set as an operating amount capable of operating the shutoff valve to an operation limit, irrespective of the current position, while, when the initialization processing has become necessary without the specific event occurring, a second process is performed in which the shutoff valve is operated by a second operating amount that is an operating amount from the current position to an initial position, and that is smaller than the first operating amount.

Abstract: A controller has a leak determiner determining the presence or absence of an evaporative gas leak in a fuel evaporative gas emission suppressing device, based on a first pressure which is the pressure of a canister when a first predetermined period has elapsed in a state where a first opening/closing section and a second opening/closing section are closed, a third opening/closing section is opened, a fourth opening/closing section is closed, and a pressure generating section is operated; and a second pressure which is the pressure within the canister when, after a lapse of the first predetermined period, a second predetermined period has elapsed in a state where the third opening/closing section is closed.

Abstract: An evaporation gas control system includes: a canister that traps evaporation gas generated in a fuel tank, a fuel tank pressure sensor that measures pressure in the fuel tank, a purge control valve that controls a flow of the evaporation gas, which is trapped in the canister, into a surge tank through a purge line, a charger that supplies intake air from the outside into the surge tank, a check valve installed on the purge line to prevent the evaporation gas in the purge line from flowing back to the canister, and a controller that diagnoses whether the check valve is faulty or not, by monitoring a pressure variation in the fuel tank when the charger and the purge control valve operate.

Abstract: An active canister purge system according to the present disclosure includes a canister that traps fuel vapor generated in a fuel tank, a purge control valve that purges the fuel vapor trapped in the canister to an intake system of an engine, a purge pump disposed downstream of the purge control valve, a differential pressure measurement device that measures a differential pressure of the purge control valve, and a controller that determines a target purge flow rate of the fuel vapor trapped in the canister, sets a target differential pressure corresponding to the target purge flow rate, and adjusts an RPM of the purge pump such that an actual differential pressure of the purge control valve, which is measured by the differential pressure measurement device, reaches the target differential pressure.

Abstract: In a hybrid vehicle, a power control unit configured to control an engine and a motor, and a vaporized gas control valve are disposed in an engine compartment located in a front portion of the vehicle. The vaporized gas control valve is disposed on a purge pipe that introduces fuel-vaporized gas generated in a fuel tank into the engine, to adjust flow of the fuel-vaporized gas. The power control unit is stored within a casing, and the vaporized gas control valve is disposed on a top portion of a side wall of the casing.

Abstract: A leak diagnosis system using a purge pump of an active purge system is provided. The leak diagnosis system includes a canister for adsorbing an evaporated gas from a fuel tank, a purge line for connecting the canister with an intake pipe, the purge pump and a purge control solenoid valve mounted to the purge line, and an auxiliary canister and an auxiliary canister control valve mounted to the purge line and located between the intake pipe and the purge control solenoid valve.

Abstract: A method for venting a fuel tank system of an internal combustion engine is provided, wherein the fuel tank system includes at least a fuel tank, a fuel vapor filter that is fluidically connected to an opening to the environment, a vent line that leads from the fuel tank to the fuel vapor filter, a purge gas line that leads from the fuel vapor filter to a fresh gas tract of the internal combustion engine, a purge gas conveying device that is integrated into the purge gas line, and an exhaust tract with a lambda sensor integrated therein. Control of the purge gas conveying device is carried out based on the measuring signal of the lambda sensor in order to regulate a volume flow of the purge gas in the purge gas line. The method may advantageously be carried out in an internal combustion engine that additionally includes a lambda controller.

Abstract: Methods and systems are provided for reducing release of undesired evaporative emissions to atmosphere for a hybrid vehicle. In one example, a method comprises locking a transmission of the vehicle in park until a request to override the locking is received at a controller of the vehicle, and conducting one or more routines related to reducing release of undesired evaporative emissions to atmosphere, where the one or more diagnostic routines rely on a vacuum derived from an engine of the vehicle combusting air and fuel while the transmission is locked in park. In this way, completion rates for conducting the one or more routines may be improved, and issues related to the release of undesired evaporative emissions to atmosphere may be reduced or avoided.

Abstract: An image recording apparatus includes a tank, a cap, a cap detector, a notification device, and a controller. The tank is configured to store ink therein. The tank is formed with a filling port for filling ink. The cap is configured to be attached to the filling port so as to close the filling port. The cap detector is configured to detect whether the cap is attached to the filling port. The notification device is configured to output particular information. The controller is configured to control the notification device to output a warning, in response to determining based on a detection signal of the cap detector that a particular period or longer has elapsed in a state where the cap is detached from the filling port.

Abstract: In a fuel vapor treatment apparatus, when an internal combustion engine is in non-turbocharging operation, a controller is configured to open a first valve and a second valve, and when the internal combustion engine is in turbocharging operation, the controller is configured to close the first valve, and to open a third valve based on pressure in a fuel tank detected by a first pressure detector.

Abstract: An EGR malfunction detection system includes an EGR valve configured to open and close an exhaust recirculation path for recirculating an exhaust gas from an exhaust channel to an intake channel of an engine, a measurement unit configured to measure an intake pressure inside the intake channel, a valve controller configured to control the EGR valve, and a malfunction detector configured to detect an anomaly in the exhaust recirculation path in accordance with a measurement unit output and a valve controller output. The malfunction detector determines whether the EGR valve is stuck in accordance with the intake pressures measured when the EGR valve is controlled to open and close. If the EGR valve is stuck, the malfunction detector determines whether the EGR valve is stuck in an open state, stuck in a closed state, or stuck in an intermediate state by comparing the measured pressure with predetermined thresholds.

Abstract: The techniques disclosed herein provide methods and systems that adaptively adjust control system update rates to optimize power consumption for laser beam scanning display devices. A display device can adjust an update rate based on changes within the system and/or changes of a surrounding environment, e.g., vibration level, a humidity level, a temperature, a resonant frequency, and/or an age of a device. As variations of the environmental properties change, the device can increase or decrease the control system update rates. Additionally, or alternatively, the system can perform a resonance calibration process to determine a resonant frequency. Based on a change in a determined resonant frequency, the system may increase or decrease the control system update rates. By dynamically controlling the system update rates based on environmental and/or physical properties of a device, the device can optimize power consumption while maintaining a desirable image quality.

Abstract: Determining the thermodynamic state of fuel includes opening the venting connection to release the tank pressure while monitoring the derivative pressure (dP/dt), closing the venting connection when one of the following conditions is met, the derivative pressure (dP/dt) is lower than a predetermined threshold DP1 or the opening time ?t1 reaches a predetermined value, if the closing of the venting connection occurs when the opening time ?t1 reaches the said predetermined value, determining that the fuel is boiling and aborting the method if the closing of the venting connection occurs when the derivative pressure (dP/dt) is lower than the said threshold DP1, measuring an initial tank pressure at the closing of the venting connection, measuring the final tank pressure after a closure time ?t2, calculating the pressure variation (?P/?t2), comparing the pressure variation (?P/?t2) with a first threshold PV1, if the pressure is lower then aborting the method.

Abstract: A valve device has a valve housing, a valve member, a guide member and a valve control unit. A center axis of a vapor outlet pipe is defined as a passage axis of a vapor outlet passage. A cross section of the vapor outlet pipe on a plane perpendicular to an axial direction of the vapor outlet pipe is defined as an outlet-pipe cross section. An area of the outlet-pipe cross section is defined as an outlet passage area. An overlapping area, in which the outlet-pipe cross section overlaps with an outlet-nearest wall portion, is formed when viewed them in the axial direction of the vapor outlet pipe and when the outlet-pipe cross section is projected on the outlet-nearest wall portion. The valve housing and the guide member are so formed that the overlapping area is smaller than a half of the outlet passage area.

Abstract: In an internal combustion engine system, a controller is configured to: perform a purge control during execution of an A/F feedback learning; detect a purge concentration after execution of the A/F feedback learning; calculate an A/F feedback learning correction value adjusted by offsetting an A/F feedback learning value with a contributing value of the purge concentration; disable updating of the A/F feedback learning correction value after calculation of the A/F feedback learning correction value and until the purge control is stopped; and detect the purge concentration based on an air-fuel ratio deviation amount.

Abstract: A method is provided to determine the hydrocarbon content in the purge gas of a fuel tank system of a combustion machine, whereby the fuel tank system comprises at least a fuel tank, a fuel vapor filter that is fluidically connected to an atmospheric port, a vent line leading from the fuel tank to the fuel vapor filter, a purge gas line leading from the fuel vapor filter to the fresh gas line of the combustion machine, a fuel tank vent valve that is integrated into the purge gas line, a pressure sensor that is integrated into the purge gas line and that can be configured as an absolute pressure sensor or as a differential pressure sensor, and a compressor that is integrated into the purge gas line.

Abstract: An evaporative emissions isolation module system configured to manage venting on a fuel tank system is disclosed. The isolation module system includes a carbon canister, a multi-valve assembly and a controller. The carbon canister is adapted to collect fuel vapor emitted by the fuel tank and to subsequently release the fuel vapor to the engine. The multi-valve assembly includes a motor drive that rotates a camshaft having at least a first cam and a second cam housed in a manifold. The multi-valve assembly has a first valve and a second valve. The first valve selectively fluidly connects the fuel tank and the carbon canister. The second valve fluidly connects the carbon canister with a vent port defined in the manifold that vents to atmosphere. The controller sends signals to the multi-valve assembly based on operating conditions to open and close at least one of the first and second valves.

Abstract: A fuel vapor processing apparatus form an internal combustion engine provided with a turbocharger includes a canister and an ejector. The canister is configured to adsorb fuel vapor from a fuel tank. The ejector is configured to generate a negative pressure by supercharged air flowing from an intake passage on a downstream side of the turbocharger to the intake passage on an upstream side of the turbocharger, so that fuel vapor in the canister is purged by the negative pressure. The ejector includes an ejector housing extending in a discharge direction of the supercharged air. The ejector housing is welded to a tubular member defining a passage wall of the intake passage such that the supercharged air is discharged into the intake passage on the upstream side of the turbocharger and that the discharge direction of the supercharged air is parallel to a direction of flow of intake air.

Abstract: Methods and systems are provided for conducting an ejector system diagnostic under conditions where an engine of a vehicle is not combusting air and fuel. In one example, a method comprises directing a positive pressure to the ejector system while the engine is off in order to communicate a negative pressure with respect to atmospheric pressure on a fuel system and an evaporative emissions system of the vehicle, and indicating that the ejector system is degraded responsive to the negative pressure not reaching a vacuum build threshold. In this way, the ejector system may be diagnosed under conditions where boosted engine operation is infrequent and/or of durations insufficient for conducting such an ejector system diagnostic.

Abstract: A detecting unit that detects a specific pressure difference between a pressure of gas that has passed throuch a canister and a pump and a pressure of the gas before passing through the canister and the pump. A gas flow rate from the pump may be higher with a smaller pressure difference between upstream and downstream sides relative to the pump, and higher with a higher purge gas density. A gas flow rate from the canister may be lower with a smaller pressure difference between upstream and downstream sides relative to the canister, and lower with a higher purge gas density. An estimating unit may estimate a flow rate of the purge gas while the specific pressure difference is an unchanged pressure difference being a pressure at which the flow rate of the gas is not chanced by the density of the purge gas.

Abstract: A method for controlling an air-fuel ratio in an idle purge-off mode is provided. The method includes stopping feedback for an amount of fuel for a particular period of time when idle purging is terminated and performing freeze control with a constant lambda control value.

Abstract: A fluid control device for an internal combustion engine, includes: plural fluid control valves each including a chamber, a first port via which fluid is introduced to the chamber, a second port via which fluid is guided out from the chamber, and a solenoid valve part opening and closing the second port with respect to the chamber; one support member for supporting and fixing the fluid control valves to a vehicle; and a branched passage having plural inlet portions communicating with the second port of the fluid control valves and an outlet portion guiding out the fluid introduced from the inlet portions, the branched passage being formed integrally with an interior of the support member. Thus, due to the branched passage being formed from the support member itself without requiring a joint member having a special shape, it is possible to cut the number of components and save installation space.

Abstract: A method for operating a drive system of a motor vehicle having a combustion engine, a fuel tank, and an evaporative emission control system, includes the following steps: opening a canister-purge valve of the evaporative emission control system; using a first sensor of the motor vehicle designed as a pressure sensor to ascertain an evaporative emission control system pressure prevailing in the evaporative emission control system between a filter device of the evaporative emission control system and the canister-purge valve; using a measurement device of the motor vehicle to ascertain an ambient pressure of the motor vehicle; using a computational device of the motor vehicle to compute a flow volume of a fluid streaming through the canister-purge valve on the basis of the ascertained evaporative emission control system pressure and the ascertained ambient pressure; and using an engine control device of the drive system of the motor vehicle to operate the drive system taking into account the computed fluid flo

Abstract: Methods and systems are provided for cleaning a fuel vapor storage canister positioned in an evaporative emissions control system of a vehicle. In one example, a method comprises sealing a fuel system of the vehicle for descending an altitude change that is predicted in advance, and subsequent to the vehicle descending the altitude change, unsealing the fuel system to passively purge fuel vapors stored in the fuel vapor storage canister to a fuel tank of the vehicle. In this way, bleed through emissions from the fuel vapor storage canister may be reduced, and engine operation may be improved.

Abstract: An arrangement is provided for use with an internal combustion engine. The arrangement includes an intake tract for the internal combustion engine and a valve that is fluidly connected to the intake tract. An activated carbon filter is located upstream from the intake tract and the valve. The valve is connected to the carbon filter by an intake line. When the valve is open, fluid can flow from the activated carbon filter into the intake tract. A pressure sensor measures upstream pressure (p1) in the intake line. A pump helps generate the pressure (p1) in the intake line. The valve is connected to the intake tract so they cooperate together to form a cavity that is connected to the intake line such that when the valve is closed, the pressure in the cavity is the pressure (p1).

Abstract: A blockage diagnosis device includes a diagnosis unit that performs blockage diagnosis on a vent passage based on a change over time in an internal pressure of the vent passage in association with the operation of a negative pressure pump. A primary determination unit of the diagnosis unit makes a primary determination that the vent passage is blocked, if a first estimation volume V1 is less than a preset threshold volume Vth. A secondary determination unit of the diagnosis unit makes a secondary determination that the vent passage is blocked, if the second estimation volume V2 is less than the threshold volume Vth. If the primary determination indicating that the vent passage is blocked is made in the primary determination unit, and the secondary determination indicating that the vent passage is blocked is made in the secondary determination unit, the diagnosis unit determines that the vent passage is blocked.

Abstract: Provided is a method for diagnosing unintended fuelling from one or more fuel injectors of a multi cylinder internal combustion engine during engine operation. Pressurized fuel is intended to be distributed by means of said fuel injectors from said accumulator tank to the cylinders for combustion. An oxidation catalyst is arranged downstream said cylinders. The method comprises: determining the pressure in the fuel accumulator tank and whether said pressure is decreasing; and determining whether the actual amount of fuel provided by the pump unit exceeds the demanded amount of fuel. The method further comprises the steps of: determining whether the temperature associated with the oxidation catalyst is above a certain level and/or determining whether the air/fuel ratio is below a certain level and/or determining whether an amount of particulate matter is above a certain level; and confirming an unintended fuelling based on the determined conditions.

Abstract: The air-fuel ratio feedback control section updates an air-fuel ratio feedback correction value. The air-fuel ratio learning control section performs, in each of learning regions, learning of an air-fuel ratio learning value. If the air-fuel ratio feedback correction value converges to a value less than or equal to a specified value, the air-fuel ratio learning control section determines that learning of the air-fuel ratio learning value in the learning region has been completed. If it has not yet been determined that learning of the air-fuel ratio learning value has been completed in any of the learning regions, the air-fuel ratio learning control section collectively updates the air-fuel ratio learning values of all the learning regions at the time of updating the air-fuel ratio learning value through learning in any of the learning regions.

Abstract: An anomaly determination device for an evaporated fuel processing device comprises: an evaporated fuel processing device (60) including a canister (61), a purge passage (62) and a purge valve (66); a first pressure sensor (43) and/or a second pressure sensor (45) for acquiring a purge downstream pressure, a third pressure sensor (53) for acquiring a canister internal pressure, and a PCM (70) that calculates a purge flow rate per unit time based on the purge downstream pressure and an opening degree of the purge valve (66), and calculates an integrated purge flow rate by integrating the purge flow rate, so as to perform an anomaly determination for the evaporated fuel processing device (60) based on the canister internal pressure and the integrated purge flow rate. The PCM (70) uses the canister internal pressure when the integrated purge flow rate becomes a predetermined flow rate or more.

Abstract: Methods and systems are provided for conducting an evaporative emissions test responsive to an indication of a vehicle remote engine start event. In one example, responsive to an indication of a remote start and further indication that the vehicle is not occupied, intake manifold vacuum is utilized to reduce pressure in the fuel system and evaporative emissions system to a threshold, wherein the fuel system and evaporative emissions system are sealed, and undesired evaporative emissions indicated responsive to a pressure bleed-up rate greater than a threshold. In this way, by applying intake manifold vacuum on the fuel system and evaporative emissions system while the vehicle is stationary and not occupied, engine hesitations resulting from desorption of fuel vapors from a fuel vapor canister are not experienced by the vehicle operator and/or passengers, and noise factors from driving conditions, passenger movement, etc., do not impact the evaporative emissions test.

Abstract: An evaporative emissions control system includes a first vent valve configured to selectively open and close a first vent, a second vent valve configured to selectively open and close a second vent, a fuel level sensor configured to sense a fuel level in the fuel tank, a pressure sensor configured to sense a pressure in the fuel tank, an accelerometer configured to measure an acceleration of the vehicle, and a controller configured to regulate operation of the first and second vent valves to provide pressure relief for the fuel tank. The controller is programmed to determine if a refueling event is occurring based one signals indicating the fuel level is increasing, the pressure in the fuel tank is increasing, and the vehicle is not moving, and open at least one of the first and second vent valves based on determining the refueling event is occurring.

Abstract: A purge control solenoid valve may include a middle housing in which an inlet flow path is formed and a middle flow path is formed on a center; a valve housing in which a driving module selectively communicating the inlet flow path and the middle flow path is installed; an upper cover coupled to the upper part of the middle housing and including a upper flow path selectively communicated with the middle flow path on the center; and a membrane provided on the upper cover and selectively communicating the middle flow path and the upper flow path.

Abstract: An evaporative emissions (EVAP) system and its method of control comprise commanding a three-way valve to fluidly connect an auxiliary vapor canister and a bottom portion of a fuel tank, controlling at least one of an engine of the vehicle and a purge pump of the EVAP system disposed between the engine, a separate primary vapor canister, and the auxiliary vapor canister to draws fuel vapor from the fuel tank into the auxiliary vapor canister for storage, commanding the three-way valve to fluidly connect the bottom portion of the fuel tank to an atmosphere outside of the EVAP system to generate additional fuel vapor in the fuel tank, commanding the three-way valve to fluidly connect the auxiliary vapor canister to the atmosphere, and controlling at least one of the engine and the purge pump to draw the fuel vapor from the auxiliary vapor canister into the engine.

Abstract: A canister purge control method for a vehicle can reduce the number of components of an active purge system provided in the vehicle. An active purge operation is performed using a pressure value measured by an intake pressure sensor, instead of a pressure value measured by a rear-end pressure sensor, after a purge control solenoid valve is fully opened.

Abstract: A fuel vapor purge system may include a turbocharger including a turbine disposed in an exhaust line, and a compressor; a canister connected to a fuel tank through a vapor line; a fuel pressure detector configured for detecting pressure in the fuel tank; a canister closing valve selectively closing an atmospheric path provided in the canister; a purge control solenoid valve disposed in a main purge line connected to the canister and selectively closing fuel vapor collected at the canister; a first check valve disposed in a first purge line and preventing the fuel vapor flowing along the first purge line from flowing reversely; a second check valve disposed in a second purge line preventing the fuel vapor flowing along the second purge line from flowing reversely; a differential pressure generating valve disposed in the intake line, and generating negative pressure; and an intake pressure sensor disposed in the intake line between the differential pressure generating valve and the compressor.

Abstract: Systems and methods for processing online data are disclosed. One such method includes receiving a plurality of data points in a time-series at a short term storage. The method also includes calculating at least one approximation coefficient based on the plurality of data points using a wavelet transform, including calculating a highest level approximation coefficient, and calculating estimated value based on the highest level approximation coefficient. The method further includes calculating differences between the estimated value and the plurality of data points of the short term storage, and determining whether a maximum difference among the calculated differences is less than a predetermined threshold. The method further includes, based on the maximum difference being greater than or equal to the predetermined threshold, storing the oldest data point of the short term storage in a long term storage.

Abstract: A valve is provided having first and second flow channels connected by a passage. A sealing device is operable to open and close the passage to control fluid flow between the first and second flow channels. The sealing device includes a first sealing body and a second sealing body through which the passages extends. The first and second sealing bodies are biased together by a spring to close the passage. The first sealing body is passively movable by fluid and actively movable by an electromagnetic device to open the passage to permit fluid to flow between the first and second passages.