277 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.

Methods and systems are presented for onboard fuel vapor recovery for large heavy duty vehicles. In one example, the methods and systems include combining a plurality of carbon filled fuel vapor storage canisters in parallel and series to capture fuel vapors that may be generated via a heavy duty vehicle.

The invention discloses a low opening and closing pressure difference safety valve for ultrahigh-temperature large-flow fuel oil steam media for spaceflight, which comprises a shell, an inlet pipe nozzle, an inlet locking nut, a large-flow valve core, a low-rigidity spring, a spring seat, a locking nut and an adjusting nut are arranged in the shell from front to back, and a flexible graphite sealing ring is embedded at the tail end of the inlet pipe nozzle. The large-flow valve element slides in the shell in the axial direction, and the front end of the large-flow valve element is designed to be an arc-shaped conical surface matched with an arc chamfer. The two ends of the spring abut against the spring seat and the tail of the large-flow valve element respectively, a safety valve exhaust hole is formed in the front end of the shell, and the safety valve exhaust hole is communicated with an inlet of the inlet pipe nozzle when the large-flow valve element is in a retreating state. The pressure relief function of a 380 DEG C ultra-high-temperature fuel oil steam medium can be achieved, the ultralow opening and closing pressure difference of 0.005 MPa under the dynamic and static environments is achieved, and the exhaust stability is guaranteed under the vibration and impact environments.

A motor vehicle comprising a floor extending along a longitudinal axis (X), including a protective assembly (30) fixed to the lower surface of the vehicle floor. The protective assembly (30) includes: - a tubular protective element (31) extending along a transverse axis (Y) perpendicular to the longitudinal axis (X), - two fixing reinforcements (32) attached at their free ends to the protective element (31), and including a fixing interface (32a) for fixing by screws to the lower surface of the vehicle floor, - a support (33) configured to support both a fuel vapor tank (8) connected to the fuel tank, and a particulate filter (9), and - at least one connecting element (35) extending along a vertical axis (Z) perpendicular to the transverse axis (Y) and to the longitudinal axis (X) connecting the support (33) to the protective element (31).

Methods and systems are presented for combining two or more common fuel vapor storage canisters to increase storage volume for fuel vapors of a vehicle. In one example, a fuel vapor manifold is constructed to permit communication between ports of carbon filled fuel vapor storage canisters. The fuel vapor manifold is a clam shell design that permits vibration welding.

A fuel tank vent valve includes a venting apparatus for regulating discharge of fuel vapor from a fuel tank and admission of outside air into a fuel tank. The vent valve is used to regulate pressure in a fuel tank.

A method for controlling a fuel vapor recovery system having first, second, and third canisters and a plurality of control valves includes (i) performing a leak test; (ii) in response to the pressure of the entirety of the fuel vapor recovery system increasing to less than a threshold value from a target vacuum pressure within a predetermined period after obtaining the target vacuum pressure during the leak test, outputting a signal indicating that the fuel vapor recovery system is not leaking; and (iii) in response to the pressure of the entirety of the fuel vapor recovery system increasing to greater than the threshold value from the target vacuum pressure within the predetermined period after obtaining the target vacuum pressure during the leak test, outputting a signal indicating that the fuel vapor recovery system is leaking.

A fuel vapor processing device for a straddle-type vehicle equipped with an engine and a fuel tank. The fuel vapor processing device includes: a canister configured to adsorb fuel vapor generated in the fuel tank; an intake system component configured to form a part of an intake passage of the engine; a purge valve configured to release the fuel vapor toward the intake passage; a first hose configured to connect the canister and the purge valve; and a second hose configured to connect the purge valve and the intake system component. The purge valve is attached to the intake system component.

The invention relates to a digital control method and system for the opening degree of a vehicle carbon tank control valve, and relates to the field of valve opening degree control. According to the service duration of the engine, integrated configuration is conducted on the fuel steam flow prediction unit, and a fuel steam flow prediction model is obtained; the engine torque, the engine rotating speed, the engine power and the engine monitoring temperature are input into the fuel steam flow prediction model, and the fuel steam expected flow is obtained; and opening correlation is conducted according to the expected flow of the fuel steam, the expected opening of the valve is obtained, and the carbon tank electromagnetic valve is controlled. The technical problem that in the prior art, the control precision of the opening degree of the vehicle carbon tank control valve is not high due to the fact that the influence of the engine service duration on the fuel steam flow requirement is not considered is solved, the carbon tank electromagnetic valve is precisely controlled by introducing the engine service duration factor, and the control precision of the opening degree of the vehicle carbon tank control valve is improved. The technical effect of improving the opening degree control precision of the vehicle carbon tank control valve is achieved.

A leak diagnosis device for a fuel vapor treatment apparatus, comprising: a first diagnosis unit that performs a leak diagnosis of a fuel tank based on a tank internal pressure in a closed state of a sealing valve; a determination unit that opens a sealing valve in a state where a purge valve and a switching valve are closed when the tank internal pressure is within a normal range, and determines whether there is an influence on the valve openability of the switching valve; and a second diagnosis unit that performs a leak diagnosis of the canister based on the tank internal pressure or the canister internal pressure when the determination unit makes a negative determination, and performs a leak diagnosis of the canister based on the canister internal pressure after closing the closed valve when the determination unit makes an affirmative determination.

Flow limiting element (94) for a fuel vapor switching and ventilation valve (10) of an internal combustion engine (26), comprising a control body (100) having a radially inner flow-around body (102) that is movable into a flow channel (107) with a nozzle-shaped section (104) that is formed in a second flow housing part (108), a spring (122) by means of which the control body (100) is loaded in a direction pointing out of the nozzle-shaped section (104), a cylindrical housing wall (136) that lies opposite a radial boundary wall (132) of the control body (100), wherein a plurality of knobs (138) distributed over the circumference are formed on the radial boundary wall (132) of the control body (100), with which knobs the control body (100) contacts the housing wall (136).

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.

The invention discloses a Fluent-based small-size oil pool fire temperature field simulation reproduction method, and belongs to the field of fire safety science and technology, and the method comprises the steps: carrying out a small-size oil pool fire combustion experiment, obtaining the weight loss data of a fuel, and taking the weight loss data as an inlet boundary condition of flow field simulation; on the basis of the Fluent environment, inlet fluid is set as fuel steam, the temperature is set as a fuel boiling point, an EDM combustion model is used for conducting gas-phase combustion large vortex simulation of small-size oil pool fire, temperature stable data of a sampling point are obtained through a thermocouple model and compared with temperature stable data obtained by a thermocouple in the experiment process, the height of an oil pan is adjusted, and the calculation error is reduced. Therefore, simulation reproduction of a small-size oil pool fire temperature field is realized. According to the method, a Fluent-based fire source establishment method reference can be provided for fire disaster and combustion simulation.

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.

To reduce ventilation resistance of a canister while restraining a decrease in adsorption performance for fuel vapor.SOLUTION: A canister comprises at least one chamber in which an adsorbent for fuel vapor is arranged, an inflow port, an atmosphere port, an outflow port, and an adsorbent agglomeration. The adsorbent agglomeration is a fibrous adsorbent aggregation arranged in a specific chamber that is one of the at least one chamber. An outer surface of the adsorbent agglomeration is provided with first and second surfaces intersecting with a flow direction of fluid. The second surface is located on the side opposite to the first surface. At least one cavity extending along the flow direction to a bottom part located inside the adsorbent agglomeration is formed in the first surface and / or the second surface in the adsorbent agglomeration.SELECTED DRAWING: Figure 3

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.

Turbomachine comprising a lubrication circuit (20) through which a lubricant (21) flows and a fuel supply circuit (40) through which a fuel (41) flows, the lubrication circuit (20) comprising a chamber (22) in which a liquid phase (23) and a gaseous phase (24) are established, the lubrication circuit (20) also comprising a sensor (30) arranged to detect the presence of fuel vapor (41) in the gaseous phase (24). Aircraft equipped with such a turbomachine. Leak detection method. Figure for the abstract: Figure 2

The present disclosure provides "Systems and methods for characterizing aged fuel for engine cold starts". Methods and systems for characterizing aged fuel that loses volatility over time are provided. In one example, a method may include: using a predetermined fuel distillation curve to estimate a fuel vapor pressure during an engine cold start; and adjusting one or more combustion parameters based on the estimated fuel vapor pressure. Because the fuel vapor pressure is directly related to the fuel volatility, adjusting the one or more combustion parameters based on the estimated fuel vapor pressure can reduce engine performance degradation associated with aged fuel, such as lag and emissions during cold starts.

The invention relates to a field of heating, specifically, to a structure of naked flame devices, e.g. automatic fireplaces, which operate with a liquid vegetal fuel and provide its evaporation followed by combustion of vapors. The automatic liquid fuel fireplace comprises a fireplace housing having a device for liquid fuel evaporation and subsequent combustion of vapors arranged therein, a liquid fuel supply system and an electronic control system which comprises a power supply unit, a control unit and sensors for controlling, managing and ensuring a safe operation of the automatic fireplace. An evaporator space comprises a liquid fuel distributor, an evaporator and a heating layer. The liquid fuel supply system comprises a pump, a fuel pipe and a liquid fuel container. A burner is provided with air supply openings to supplying air along a combustion zone perimeter, and a fan is arranged below, the fan is coupled to the air supply openings. The fireplace housing is provided with air supply openings to supplying the air to the fan. The invention ensures evaporation of the liquid fuel and further combustion of the produced fuel vapors is carried out within the single device, as well as increase of the fireplace operation reliability and safety, and increase of compactness.

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.

A fuel tank venting system for an automotive vehicle comprising: a fuel tank comprising a vapor dome, a refueling pipe, a fuel vapor trap that is connected to the fuel tank by an inlet conduit, wherein the inlet conduit is connected with the fuel tank through an orifice which is permanently open, the orifice being arranged in the vapor dome of the fuel tank in a static condition and a normally closed shutter device that communicates with the atmosphere and that is connected to the fuel vapor trap by an outlet conduit, the normally closed shutter device comprising an electrically-actuated valve being closed when the electrically-actuated valve is de-energized, wherein the normally closed shutter device is configured to be open during vehicle refueling process and to be closed when the fuel in the fuel tank reaches a predetermined fill level and when the vehicle is in normal operation.

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.

The invention provides a step-by-step hydrogen and carbon monoxide preparation device and method, and relates to the technical field of energy conversion, the step-by-step hydrogen and carbon monoxide preparation device comprises a first reactor, a second reactor and a third reactor which have the same structure; oxygen carriers and absorbents are arranged in reaction cavities of the three reactors, a fuel steam inlet and an air inlet are formed in the gas inlet end of each reactor, and a hydrogen outlet, a carbon monoxide outlet and a nitrogen outlet are formed in the exhaust end of each reactor; heating devices are arranged in reaction cavities of the three reactors, control valves are arranged on fuel steam inlets, air inlets, hydrogen outlets, carbon monoxide outlets and nitrogen outlets of the three reactors respectively, and reaction stages in the three reactors are controlled by controlling opening and closing of the control valves and the temperature of the heating devices. Therefore, the three reactors respectively carry out reaction processes of three different stages at the same time. According to the invention, the hydrogen yield and hydrogen concentration can be improved, the reaction temperature is reduced, and the step-by-step preparation of high-concentration hydrogen and carbon monoxide is realized.

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.