143 results about "Fuel vapor" patented technology

The invention provides a carbon tank aging diagnosis method and device, a vehicle and a storage medium, and the method comprises the steps: determining a first theoretical fuel oil vapor adsorption amount of a carbon tank according to the fuel oil basic evaporation amount and evaporation time of fuel oil; when a preset carbon tank desorption condition is met, the carbon tank is controlled to execute desorption operation; in the process that the carbon tank executes desorption operation, the actual fuel steam desorption amount of the carbon tank is determined according to the desorption flow of the carbon tank, the air flow of a throttle valve, the fuel injection amount and the actual air-fuel ratio; and determining a carbon tank aging diagnosis result according to a comparison result of the first theoretical fuel oil steam adsorption amount and the actual fuel oil steam desorption amount. As whether the carbon tank is aged or not is diagnosed, a user can know the aging condition of the carbon tank in time, so that the aged carbon tank can be maintained or replaced in time, and the problem that the emission of evaporative pollutants of a vehicle exceeds the standard is avoided to a certain extent.

An evaporative emission control system (EVAP) canister including a housing, where the housing has a first bed volume, a second bed volume, a load port, and a purge control receptacle. The first bed volume includes a first opening and a second opening opposite the first opening. The second bed volume includes a third opening and a fourth opening opposite the third opening. The load port enables fuel vapor from a fuel tank to enter the first bed volume. The purge control receptacle is on a side of the first bed volume and is configured to receive a first purge control insert. The first purge control insert is configured to ensure that unfiltered fuel vapor condensate drawn in during a purge cycle is passed through a first portion of a fuel vapor filtering medium in the first bed volume.

The utility model discloses a fuel filling device and a vehicle. The fuel filling device comprises a filling pipe; a filler cap; the sensing circuit is arranged on the filling pipe and used for being electrically connected with a control unit of the vehicle, and the sensing circuit is at least partially interrupted; and the movable contact rod is movably arranged on the filling pipe, one end of the movable contact rod corresponds to the filling port and is used for being in transmission fit with the filling cover, and the other end of the movable contact rod selectively moves to be electrically connected with the two ends of the interruption part of the sensing circuit. Therefore, one end of the movable contact rod corresponds to the filling port and is used for being in transmission fit with the filling cover, the other end of the movable contact rod is provided with the electric contact part and corresponds to the interruption part of the sensing circuit, and the electric contact part selectively moves to be electrically connected with the two ends of the interruption part of the sensing circuit, so that the mounting state of the filling cover can be detected; when the filling cover is not installed or not installed in place, the control unit can be combined to give an alarm for reminding, and therefore fuel steam can be prevented from overflowing.

This invention belongs to the field of ramjet technology and provides a wide-speed range ramjet fuel supply system and method driven by a pyrolysis oil-gas turbine. The system comprises a fuel tank, a centrifugal pump, a motor, an oil-gas turbine, a battery, an electromagnetic control module, fuel lines, a pyrolysis fuel vapor line, a combustion chamber, and a regenerative cooling channel on the outer wall of the combustion chamber. Through the connection between the centrifugal pump, the regenerative cooling channel, and the oil-gas turbine, the system utilizes the cracking of hydrocarbon fuel into small-molecule pyrolysis kerosene vapor to drive the turbine rotor to produce work. The motor then assists in starting the ramjet, thereby resolving the power generation challenges of the ramjet mode and alleviating thermal protection issues.

The present invention provides a system (1) to prevent the formation of fuel vapors comprising a containment tank (10) and a variable volume tank (12) accommodatable within the containment tank (10), wherein the variable volume tank (12) is configured to receive liquid fuel. Our invention can be used in any tanks or reservoirs of liquid products that attack the ozone layer, preventing the formation of vapors that are extremely harmful to nature and the environment.

The present application relates to the technical field of vehicles and discloses a fuel system, a fuel supply system and a vehicle, wherein the fuel system comprises a fuel tank, a fuel filling pipeline, a return gas pipeline, a pressure sensor and a main control unit; the main control unit is configured to control a return gas pipeline cover to open when a fuel filling instruction is received; after determining that the return gas pipeline is in communication with a gas collecting pipeline of a gas collecting system through a locking structure, the main control unit controls an FTIV valve to open, so that fuel vapor in the fuel tank is collected to the gas collecting system through the return gas pipeline and the gas collecting pipeline; when the pressure value is less than a preset pressure value, the main control unit controls a fuel filling pipeline cover to open, so that fuel is added to the fuel tank through the fuel filling pipeline. The fuel system can improve the design freedom, pressure resistance range and weather resistance of the fuel tank, release a large amount of vehicle layout space, reduce the layout workload, reduce the emission of the vehicle, shorten the development cycle of the vehicle, reduce the workload and cost of calibration, and improve the stability of engine operation.

The application provides a control method of a carbon tank electromagnetic valve, an electronic device and a storage medium, and is applied to a vehicle. The vehicle comprises a carbon tank and a carbon tank electromagnetic valve. The carbon tank electromagnetic valve is used for controlling opening and closing of the carbon tank. The control method comprises the following steps: in response to a carbon tank opening request, receiving an actual air-fuel ratio of the vehicle at present; calculating a fuel vapor concentration in the carbon tank according to the actual air-fuel ratio; calculating a carbon tank fuel injection ratio according to a first calculation rule, wherein the carbon tank fuel injection ratio is a ratio between a maximum fuel vapor amount of the carbon tank and a total fuel injection amount of the vehicle; calculating a fuel vapor amount request value of the carbon tank according to the fuel vapor concentration and the carbon tank fuel injection ratio; calculating a duty cycle of the carbon tank electromagnetic valve according to the fuel vapor amount request value, and controlling the carbon tank electromagnetic valve according to the duty cycle. The application can accurately control the fuel vapor amount of the carbon tank entering the engine, thereby reducing the interference of the fuel vapor in the carbon tank on the air-fuel ratio when the fuel vapor enters the engine, and ensuring stable operation of the engine.

1. Name of the design product: Fuel tank isolation valve (Mini-FTIV). 2. Use of the design product: The product of this design is used to prevent fuel vapor leakage and balance the pressure in the fuel tank. 3. Design key points of the design product: Lies in the overall shape of the product. 4. Picture or photo that best shows the design key points: Front view.

An adjustable evaporative emission system (EVAP) canister has a housing with at least a first chamber and a second chamber. The first chamber has a first opening and a second opening opposite the first opening, and the first chamber has a first chamber maximum capacity to house a fuel vapor filtering medium. The second chamber has a third opening and a fourth opening opposite the third opening, and the third opening is proximate the second opening of the first chamber. The second chamber has a second chamber maximum capacity to house the fuel vapor filtering medium. The housing is configured to receive a plurality of volume adjusting spacers proximate to the second opening and the third opening, where each volume adjusting spacer of the plurality of volume adjusting spacers adjusts at least one of the first chamber maximum capacity and the second chamber maximum capacity.

The invention relates to a fuel tank inerting system, a fuel tank inerting method and an aircraft. On one hand, the low-temperature rare gas generated by gasification of the liquid rare gas is directly used for replacing oxygen and fuel steam in the fuel tank and reducing the temperature in the fuel tank, and on the other hand, the low-temperature rare gas is used for cooling the fuel steam discharged out of the fuel tank; and then the cooled fuel steam or the fuel liquid drops formed by condensation are returned to the fuel tank to further reduce the temperature in the fuel tank and the concentration of the fuel steam, so that double inerting of the fuel tank is realized. The fuel tank inerting system and method according to the present disclosure may be applicable to various types of aircraft.

The present invention relates to the technical field of automobile emissions, and provides a method for designing the volume of a carbon canister. The method specifically includes the following steps: S1. Determine the fuel vapor θ generated by the fuel tank where the carbon canister is located per unit time; S2. Determine the ratio of BAX1500 type activated carbon and BAX1100 type activated carbon, and then calculate the volume V<supgt;*< / supgt;<subgt;activated carbon< / subgt; of the activated carbon, that is, the volume of the carbon canister; S3. Based on the aspect ratio of the carbon canister, correct the volume V<supgt;*< / supgt;<subgt;activated carbon< / subgt> of the current carbon canister, and the corrected volume V<subgt;activated carbon< / subgt> of the carbon canister is the final volume of the carbon canister. By optimizing the ratio of BAX1500 type activated carbon and BAX1100 type activated carbon, the present invention makes the use cost of the carbon canister as small as possible under the conditions of meeting the adsorption requirements of the fuel tank and the volume constraint of the carbon canister, and comprehensively considers the performance, volume and use cost of the carbon canister.

An internal combustion engine includes a tank that stores liquid fuel, a cylinder, an intake port connected to the cylinder, a port injection valve that injects fuel into the intake port, a pressurizer that pressurizes fuel vapor in the tank, and a low-pressure passage that connects the pressurizer and the port injection valve to each other.

An evaporative emissions (fuel vapor) canister is provided. The canister includes a casing defining an internal volume therein, and the casing includes an inlet in fluid communication with the internal volume. The internal volume includes a bed of a first adsorbent material adjacent the inlet, and a bed of a second adsorbent material separated from the inlet by the bed of the first adsorbent material. The first adsorbent material is resistant to liquid fuel, and the second adsorbent material is different than the first adsorbent material. Liquid fuel that enters the internal volume of the casing via the inlet is adsorbed by the first adsorbent material such that the first adsorbent material protects the second adsorbent material from the liquid fuel. The first adsorbent material is thereby protected from damage by the liquid fuel. A method of making an evaporative emissions canister is also provided.

This invention discloses a high-cycle adsorption-desorption fuel vapor activated carbon adsorbent and its preparation method. The preparation method includes: mixing biomass raw materials, phosphoric acid, and high-nitrogen substances in a certain proportion; stirring in a mixer at an oil bath temperature of 230°C until slightly matured; dispersing the matured mixture using a dispersion device; activating it in an externally heated activation converter by introducing a mixture of nitrogen and hydrogen gas; rinsing the activated mixture and recovering the phosphoric acid to obtain high-nitrogen activated carbon; drying the high-nitrogen activated carbon; grinding the high-nitrogen activated carbon; mixing carbon powder and gel in a mass ratio of 2:1 to maintain the moisture content of the mixture at 30%; granulating using a screw granulator; and drying and solidifying the obtained granules. This invention improves the activated carbon adsorbent by reducing the proportion of hydrophilic oxygen-containing functional groups, increasing the hydrophobicity of the activated carbon, and thus extending its service life.

A filter can includes at least one chamber, an inlet, an atmospheric port, an outlet, and a plurality of rod-shaped portions. An adsorbent for fuel vapor is disposed in the at least one chamber. The plurality of rod-shaped portions are disposed at an elongated portion of a target chamber, which is any of the at least one chamber. The adsorbent disposed in the target chamber is formed as a plurality of granular components. At least a portion of the plurality of rod-shaped portions has at least one recess formed in an outer peripheral surface thereof.

A vehicle emissions control system including: a fuel tank; a canister including a material configured to absorb fuel vapors released from liquid fuel stored within the fuel tank; a pressure relief valve configured to open to vent the fuel tank and permit the fuel vapors and the liquid fuel to flow out of the fuel tank; and a fuel separator configured to change a flow velocity of fuel flowing from the fuel tank to separate the fuel vapors from the liquid fuel, the fuel separator in fluid communication with the fuel tank and the canister to direct the fuel vapors to the canister and direct the liquid fuel away from the canister.

Methods and systems are provided for a fuel system. In one example, a method may include adjusting operation of a fuel-operated heater (FOH) in response to a condition of a canister. The FOH is activated and configured to flow heated air to the canister to promote desorption of fuel vapors stored therein.

Vehicle system, featuring: an internal combustion engine (10); Evaporative emission system (30) with a container (40) arranged to collect fuel vapors from a fuel tank and connected to an intake part of the internal combustion engine (10) via a vent valve (37); wherein the container (40) defines a chamber (41) and a flexible metal-organic framework material (MOF) is arranged in the chamber (41); a controllable device (54) connected to the flexible MOF material; and a control unit (80) which is operationally connected to the controllable device (54) and the vent valve (37), wherein the control unit (80) contains a set of commands which can be executed to: Activating the controllable device (54) and controlling the vent valve (37) in response to a command to vent the container (40) into an open state, Determining an activation parameter for the controllable device (54), Determining a venting flow and a total venting mass, and Deactivating the controllable device (54) if the total venting mass is greater than a threshold value.

The utility model discloses a fuel evaporative emission control system for an all-terrain vehicle. The fuel evaporative emission control system comprises a fuel system, a power system, an air inlet system, a carbon tank system and a circuit control system. The system can adsorb fuel steam escaping from the fuel tank, the fuel steam is guided into the carbon tank through the fuel return pipe to be adsorbed, and fuel is controlled by the carbon tank electromagnetic valve to enter a throttle valve body of a power system again. An engine control unit ECU controls opening and closing of a carbon tank electromagnetic valve according to state parameters such as whether an engine is started or not, the working duration of the engine, the temperature of engine cooling liquid, the rotating speed of the engine, the concentration of a mixer and the opening degree of a throttle valve, and fuel steam stored in a carbon tank is sucked into the engine through a vacuum oil pipe to participate in combustion. The system is reasonable in layout, simple in structure and reliable in function, meets the requirements of the whole vehicle emission regulation standard, and meanwhile reduces air pollution caused by fuel evaporation emission.

The invention relates to the field of carbon canister remaining working capacity detection, in particular to an in-use carbon canister remaining working capacity detection method and a screening testers, mixed gas containing butane is introduced from an oil filling port of a vehicle to simulate fuel steam generated by an oil tank, the mixed gas enters a carbon canister through the oil tank, and the fuel steam is fed into the carbon canister through the oil tank. A sensing element is arranged at an atmosphere port of the carbon canister so as to detect the gas concentration of mixed gas discharged from the atmosphere port; enabling the residual working capacity of the carbon canister to correspond to the gas concentration value, and obtaining a test result whether the carbon canister can be continuously used or not according to whether the measured gas concentration exceeds a preset standard value or not after the carbon canister adsorbs butane to a specified gram number. The residual adsorption capacity of the carbon tank can be detected and evaluated along with a vehicle, and environmental pollution caused by insufficient working capacity of the carbon tank is avoided.

Device for capturing fuel vapors from a vehicle, the device comprising the following: a canister device (40) with a first opening (31) which is in fluid communication with a headspace part (72) of a fuel tank (71), wherein the canister device (40) defines a chamber (41) which is in fluid communication between the first opening (31) and a second opening (32); a first metal-organic framework material, MOF, arranged in chamber (41), wherein the first MOF is configured to adsorb fuel vapor; and a second material arranged in the chamber (41), wherein the second material is configured to adsorb fuel vapor; characterized in that the first MOF material has a pore width of less than 5 nm and the second material comprises a second MOF material with a pore width in a range between 10 nm and 40 nm.

The present invention provides a device for purifying fuel vapor in a fuel system. The device increases the amount of fuel vapor desorbed from a carbon canister during engine drive, thereby preventing fuel vapor adsorbed to the carbon canister from being discharged to the atmosphere.

A carbon canister assembly may include a main carbon canister and an auxiliary carbon canister. The main carbon canister may include a first cavity. The first cavity may be cylindrical. The first cavity may be filled with an adsorption material for adsorbing evaporated fuel vapor. The auxiliary carbon canister may include a second cavity in communication with the first cavity. The second cavity may have a round table shape. A diameter of a cross section of the second cavity may gradually decreases from a bottom of the second cavity to a top of the second cavity.

A method for operating a propulsion system with an internal combustion engine (1), a fuel tank (5), a vapor absorber (11) which is switchable for absorbing fuel vapor between the fuel tank (5) and an environment and for regenerating between the environment and an air inlet (6) of the internal combustion engine (1), and with a lambda sensor (9) arranged on an exhaust stream (7) of the internal combustion engine (1) comprises the steps: a) Starting (S1) the internal combustion engine (1) with the connection of the steam absorber (11) to the air inlet blocked; b) Monitoring (S4, S5) an output value of the lambda probe (9) and its time derivative; and c) Release the connection of the vapor absorber (11) to the air inlet when the time derivative of the output value falls below a derivative limit value (S5).

The application provides a leakage detection method of a fuel evaporation system and an electronic device, and is applied to a fuel evaporation system of a vehicle. The method comprises the following steps: when the parking time of the vehicle exceeds a first preset time length, and the enabled working condition of the fuel evaporation system is normal, the vacuum degree of a first space in which a first electric control valve is in a closed state is obtained; a first diagnosis strategy or a second diagnosis strategy is selected according to the vacuum degree, and leakage detection is performed on the first space and a second space to obtain a detection result, wherein the first diagnosis strategy is a diagnosis strategy corresponding to that the first space has no leakage when the absolute value of the vacuum degree is greater than a first preset threshold. In this way, an air pump does not need to be additionally arranged, so that the hardware cost of the system is reduced. In addition, different diagnosis strategies are beneficial to improving the diagnosis completion rate. Since the first space of the fuel evaporation system rarely leaks, the frequency of using the first diagnosis strategy is usually high, and the detection process of the first diagnosis strategy is less, so that the diagnosis efficiency is improved.

This invention relates to a method, system, and device for generating visible light shielding smoke. The method includes: controlling a compressor to deliver compressed air into a combustion chamber; controlling a fuel supply device to deliver a first preset amount of first fuel to the front end of the combustion chamber, causing the first preset amount of first fuel to burn with the compressed air in the combustion chamber to generate high-temperature fuel gas; controlling the fuel supply device to deliver a second preset amount of second fuel to the rear end of the combustion chamber, causing the second preset amount of second fuel to mix and evaporate with the high-temperature fuel gas to form a mixed flue gas containing fuel vapor; and controlling a turbine to eject the mixed flue gas generated in the combustion chamber through a tailpipe to form a visible light shielding smoke screen. This invention solves the problem that traditional smoke screen generating devices require a misting fuel injection mechanism after the turbine of a gas turbine engine, resulting in a large size, heavy weight, and inconvenience in use.

The utility model provides a fuel steam pressure sensor and an automobile. The fuel steam pressure sensor comprises a housing, the housing comprises a main housing, a left interface, a right interface and a front interface, the left interface and the right interface are respectively arranged at two sides of the main housing, the front interface is arranged at the front end of the main housing, the left interface, the right interface and the main housing form a first communication cavity, and the front interface and the main housing form a second communication cavity; the upper cover is hermetically connected with the main shell through a first sealant layer, and an accommodating space is formed between the upper cover and the interior of the main shell; the integrated module is arranged at the bottom in the accommodating space and is connected with the main shell through a second sealant layer; and the PCB is arranged in the accommodating space, is connected with the integrated module and is arranged at the upper part of the integrated chip. According to the invention, all the sensitive elements are sealed on the ceramic substrate to form the integrated chip, and a plurality of circuits are printed on the ceramic to lead out signals to the patch bonding pad, so that the packaging cost is greatly reduced, and the integrated manufacturing efficiency is improved.

The utility model discloses a negative pressure channel valve, which relates to the technical field of general gasoline engines and comprises a negative pressure chamber, a first connecting chamber and a second connecting chamber, a first elastic sealing element is arranged between the negative pressure chamber and the first connecting chamber, a second elastic sealing element is arranged in the second connecting chamber, and a sealing plate is fixedly mounted in the first connecting chamber. A connecting hole and a vent hole are formed in the sealing plate, the negative pressure chamber is communicated with an air inlet channel of an engine, the first connecting chamber is communicated with a carbon tank, the second connecting chamber is communicated with a balance hole of a carburetor, the second connecting chamber is communicated with the atmosphere, and a transmission assembly is arranged in the negative pressure channel valve and penetrates through the first elastic sealing piece and the connecting hole at the same time. The second elastic sealing piece is fixedly installed on the transmission assembly. Channels can be automatically switched through the negative pressure of the engine, when the engine is started, the atmosphere enters the balance hole of the carburetor through the second connecting chamber, the engine can operate normally, when the engine flames out, fuel steam can be absorbed by the carbon tank, and the evaporative emission standard of the general gasoline engine is met.

This application belongs to the field of afterburner design and is a thin-film evaporation and middle-slit dual-mode stabilizer, which includes a stabilizer outer wall, a stabilizer inner wall, a fixing mechanism, an oil inlet pipe, and a fuel manifold. When ignition is carried out, fuel is ejected reversely from the fuel injection holes of the fuel manifold and impacts the first reverse injection baffle or the second reverse injection baffle to form oil film evaporation. After evaporation, the combustible gas and air are mixed and enter the recirculation zone through turbulence. Finally, the oil-gas mixture in the recirculation zone is ignited by an ignition plug, realizing the ignition structure of the thin-film evaporation type stabilizer. At the same time, fuel is ejected in the direction of the air flow from the air release holes, enters the recirculation zone through turbulence, and is ignited by the ignition plug, realizing the ignition structure of the middle-slit flame stabilizer. Thus, the fuel vapor accumulated at the lower opening of the fuel manifold in the initial stage of fuel supply can be quickly discharged from the air release holes, avoiding coking caused by excessive fuel temperature.

The present invention provides an abnormality diagnosis device for an evaporated fuel processing device capable of performing abnormality diagnosis by a simple method. The abnormality diagnosis device for an evaporated fuel processing device is provided with: a first acquisition unit; an opening / closing control unit that executes an opening / closing process in which an opening / closing operation is repeated a predetermined upper limit number of times; a second acquisition unit; and a diagnosis unit that diagnoses the fuel tank, the canister, the closing valve, and the switching valve as normal if the amount of increase from the pressure in the tank acquired by the first acquisition unit to the pressure in the tank acquired by the second acquisition unit is equal to or greater than a threshold value before the number of repetitions of the opening / closing operation reaches the upper limit number. And diagnoses at least one of the fuel tank, the canister, the closing valve, and the switching valve as an abnormality even if the number of repetitions of the opening / closing operation reaches the upper limit number and the increase amount is less than a threshold value.