23 results about "Fuel vapor" patented technology

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.

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.

The utility model provides a kind of low fuel evaporation system of oil passage unobstructed, it is related to engine fuel field, including oil tank, carbon canister, carburetor and oil switch, wherein, the oil outlet of oil tank is connected to the oil inlet of carburetor by oil switch, its gas outlet is connected to the adsorption port of carbon canister using adsorption pipeline, two-way valve is set on adsorption pipeline;The desorption port of carbon canister is connected to the desorption port of carburetor using desorption pipeline, one PCV valve is set on desorption pipeline, the negative pressure port of PCV valve is connected to the negative pressure port of carburetor, and the atmosphere balance hole of carburetor is connected with atmosphere balance hole solenoid valve;Scheme by setting first check valve, which is connected to gas outlet and atmosphere balance hole solenoid valve, second check valve, which is connected to oil tank and atmosphere, or setting second PCV valve, which is connected to negative pressure port of carburetor between air inlet and carbon canister, maintain pressure balance of oil tank when fuel engine works, and engine oil passage unobstructed can work continuously.

The application discloses a carbon tank and a fuel evaporation control system, wherein the carbon tank is loaded on a vehicle and used for adsorbing evaporated fuel, the carbon tank comprises a containing cavity, and an adsorbent is arranged in the containing cavity; at least two adsorption units are arranged in the containing cavity along the axial direction of the carbon tank; a partition is arranged in the adsorption unit and arranged perpendicularly to the axial direction of the carbon tank, and the partition divides one adsorption unit into two adsorption chambers; an air inlet channel is arranged in the containing cavity and used for guiding gas from an air inlet on the shell into the adsorption chamber; and an air outlet channel is arranged in the containing cavity and used for guiding the gas from the adsorption chamber to the containing cavity through an air outlet on the shell. The containing cavity of the carbon tank is divided into multiple adsorption chambers, thereby effectively blocking the migration of adsorbent particles, ensuring smooth gas flow and uniform distribution of the adsorbent, and reducing the risk of carbon powder blocking the filter pad.

The utility model belongs to the field of warming stove, concretely relates to a kind of multi-section catalytic combustion function's warming stove, including furnace body, furnace cover and detachable furnace head, the furnace body hollow setting, the furnace cover is set in the top of furnace body, detachable catalyst sheet layer is set in the furnace head, the inside of the top of furnace cover is fixedly provided with sleeve, the sleeve is set corresponding with the furnace head position under the furnace body, furnace cover clamping state;The inside lower part of the sleeve is detachably provided with at least one layer of catalyst sheet layer;The sleeve cross section position corresponding vent hole is set on the furnace cover;The warming stove adopts the unique sleeve and multilayer catalyst installation structure design, can effectively reduce the escape of fuel vapor, and improve the combustion efficiency and utilization of fuel, reduce the emission of TVOC.

The application relates to a containing device of a vehicle and the vehicle. The containing device comprises a containing structure, the containing structure is used for containing an adsorbent, and the adsorbent is used for adsorbing fuel vapor. The containing structure is provided with an adsorption port, a desorption port and an atmosphere port. The adsorption port is used for communicating with a fuel tank of the vehicle. The desorption port is used for communicating with an air intake manifold of an engine of the vehicle. The atmosphere port is used for communicating with an atmosphere environment outside the containing device. The containing device has at least two states. In different states, the volume of a space in the containing structure which communicates with the adsorption port is different, or the volume of a space in the containing structure which communicates with the desorption port is different.

Fuel supply device (FS), comprising: a filler neck body (110) configured to form a hollow fuel passage section (110a) arranged to define a fuel passage (100P) through which supplied fuel passes, and an attachment section (111) configured to fit into a tube (40) arranged for introducing the supplied fuel into a fuel tank (FT), a pipe guide (150) arranged within the fuel passage section (110a) and configured for introducing a dispensing nozzle (NZ) for supplying the fuel, and a first rib (151) positioned in a region where the attachment section (111) is positioned in a direction along an axis passing through the center of the fuel passage (100P) between the filler neck body (110) and the pipe guide (150).and which is provided for contact with an outer circumferential surface of the pipe guide (150), wherein the first rib (151) is integrated with the pipe guide (150) such that it projects from the outer circumferential surface of the pipe guide (150), the fuel tank (FT)-side end (150y) of the pipe guide (150) and a fuel tank (FT)-side end of the first rib (151) are located closer to the fuel tank (FT) than a downstream lower end of the filler neck body (110), the fuel supply device (FS) further comprising a vent opening (115) which is connected to the filler neck body (110) and introduces fuel vapor into the fuel passage (100P) for circulation in the fuel passage (100P), and the mounting section (111) is located closer to the fuel tank (FT) than a section where the vent opening (115) is connected to the filling nozzle body (110).

This invention discloses a method for hazard assessment of the ship deck fuel handling environment, comprising: constructing a first-type test facility based on the ship deck fuel handling environment; conducting multi-level tests on the first-type test facility under different radiation conditions, different radiation times, and fuel vapor ignition at different test temperatures to obtain first-type test results; improving the first-type test facility to obtain a second-type test facility; controlling the test temperature in the second-type test facility to the highest temperature of the first-type test results and then starting radiation testing according to a preset frequency and power to obtain second-type test results; and conducting a hazard assessment of the ship deck fuel handling environment based on the first-type and second-type test results to obtain an assessment result. This invention enables a comprehensive assessment of the hazards of the ship deck fuel handling environment. The method not only improves the accuracy of the assessment but also provides a scientific basis for developing corresponding safety measures and operating procedures.

The invention discloses a safety system (4) for a combustion engine (2', 2") utilizing a low flashpoint fuel, the system comprising: a cover (8) arranged to be positioned near the engine to create a low-pressure environment around the engine, the cover configured to generate sufficient low pressure (15) to draw in air from around the engine; an inlet conduit (14) connecting the cover to the engine's air intake (20), configured to maintain the low-pressure environment and direct the fuel vapour-contaminated air into the air intake; a fuel sensor (12) arranged to monitor the concentration levels of fuel vapor (3) in the inlet conduit (14) due to low flashpoint fuel leaking from the engine; wherein the fuel sensor is configured to detect when a threshold concentration of fuel vapor in the inlet conduit is exceeded and to trigger a control response to cut off a fuel line supplying the low flashpoint fuel to the engine.

1. The name of the design product: engine fuel evaporation pipeline assembly. 2. The use of the design product: pipe arrangement for automobile fuel evaporation emission control system. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

This application provides a vehicle, a fuel evaporative emission system, a carbon canister, and a valve device thereof. The valve device includes at least one valve unit, each valve unit including a mounting ring, a sealing cap, and an excitation assembly. The mounting ring is fixed to the outer periphery of a connecting pipe, forming a mounting cavity between the mounting ring and the connecting pipe. The sealing cap is disposed in the mounting cavity and has a non-perforated portion and a perforated portion on the outer periphery of the non-perforated portion. The perforated portion has at least one flow hole. The non-perforated portion is directly opposite the opening of the connecting pipe. When the sealing cap is in the open position, the non-perforated portion separates from the opening of the connecting pipe, allowing the connecting pipe to communicate with the flow hole. When the sealing cap is in the closed position, the non-perforated portion covers the opening of the connecting pipe, sealing the connecting pipe. The excitation assembly provides a force to the sealing cap to maintain it in the closed position. This application integrates a valve device onto the carbon canister, simplifying the structure of the fuel evaporative emission system and making the layout of the fuel evaporative emission system more compact, concise, and neat.

This invention relates to the field of vehicle carbon canister desorption technology. The invention discloses a method, system, vehicle controller, and vehicle for carbon canister desorption in hybrid vehicles. The method includes: after the hybrid vehicle is started, acquiring the State of Charge (SOC) value of the hybrid vehicle's power battery; controlling the engine to obtain a preset speed based on the SOC value, thereby controlling the carbon canister solenoid valve of the hybrid vehicle to obtain the desorption flow rate; controlling the airflow hydrocarbon sensor of the hybrid vehicle to acquire carbon canister load information in real time; and performing carbon canister desorption operation based on the carbon canister load information. This invention can accurately and reliably acquire carbon canister load information, quickly and timely desorb fuel vapor from the carbon canister, and reduce environmental pollution caused by fuel vapor emissions into the atmosphere.

This application relates to an isolation valve, a fuel evaporative emission system, and a vehicle, including a valve housing and a valve core. The valve housing has a valve cavity and a first opening and a second opening communicating with the valve cavity. The valve core is movably disposed in the valve housing and configured to switch between a first state and a second state under the action of an external force. The first opening is used to communicate with a carbon canister. When the valve core is in the first state, both the first opening and the second opening are communicating with the valve cavity. When the valve core is in the second state, the valve core blocks the communication between the first opening and the valve cavity. By blocking the communication between the first opening and the valve cavity during the closed monitoring phase, the tendency of gas from the carbon canister side to diffuse into the valve cavity can be limited, thereby helping to reduce the risk of gas leakage along the valve core's connection to the outside environment. This, in turn, helps to maintain the overall sealing performance of the isolation valve to meet the sealing requirements of the closed monitoring environment.

The utility model discloses a fuel vapor pressure sensor belongs to pressure sensor technical field. A kind of fuel vapor pressure sensor, including shell and connector connected on shell, be provided with detection chamber on shell, still include: fixedly connected on the gas nozzle of shell;Detection platform is installed in detection chamber, and the detection end of detection platform is linked with gas nozzle, and detection platform is provided with isolator, for separating gas nozzle and detection chamber;Plugging piece, exhaust structure is opened in cover plate, and plugging piece is used to close exhaust structure;The utility model is opened exhaust structure on cover plate, to install detection platform and cover plate in detection chamber after well, using sealant to seal its edge, due to the existence of exhaust structure, the excess gas in sealed chamber can be promptly discharged, then using plugging piece to close exhaust structure, it can guarantee the pressure stability in detection chamber, to improve the use stability and the accuracy of detection of entire sensor.

The invention relates to a method for controlling an internal combustion engine (1) comprising: - a combustion chamber, - a fresh air intake line (20) into the combustion chamber, - an exhaust line (80) for burnt gases from the combustion chamber, which is equipped with a catalytic converter (82), - a fuel injection circuit (60) into the combustion chamber, which includes a fuel tank (61), and - a fuel vapor discharge line (50) originating in the fuel tank and terminating in the exhaust line, and which includes a fuel vapor storage tank (51) and a fuel vapor flow control valve (52). According to the invention, when the internal combustion engine is started and fuel injection into the combustion chamber is suspended, the control valve is opened. Figure for the abstract: Fig. 1

The present application relates to the technical field of engine fuel, and relates in particular to a novel fuel evaporation system, comprising: an engine, an intake passage, a fuel tank, and a carbon canister. The fuel tank is provided with a fuel pump and a rollover valve. The carbon canister is provided with an adsorption port and a desorption port. The fuel pump is connected to the intake passage. The rollover valve is connected to the adsorption port. A check valve is provided between the intake passage and the carbon canister. An inlet of the check valve is connected to the desorption port, and an outlet of the check valve is connected to the intake passage. A bidirectional valve is provided between the fuel tank and the carbon canister. An inlet of the bidirectional valve is connected to the rollover valve, and an outlet of the bidirectional valve is connected to the adsorption port. The present application achieves the effects of reducing direct discharge of fuel vapor into the air that causes waste and pollution, while reducing costs, simplifying the structure, and being applicable to general-purpose gasoline generators.

This invention relates to a blow molding method for a hollow body with a reinforcing rib structure on the inner surface. The molding method includes the following steps: 1) Two preforms are cut into blanks, which are then positioned between two molds and an intermediate mold; a reinforcing rib extrusion device is provided on the intermediate mold; 2) The molds are closed, and air is blown into the intermediate mold to preform the preforms; 3) After preforming, the reinforcing ribs are extruded and fixed to the internal components; 4) The molds are closed, and a blower needle on the mold begins to blow air, fusing the two preformed half-shells together along the parting line to form a hollow body, which is then cooled and solidified; 5) The molds are opened, and the product is removed. This application solves the problem that plastic fuel tanks have low inherent strength and cannot withstand the high fuel vapor pressure caused by temperature differences and prolonged engine inactivity in the field of high-pressure fuel tanks, resulting in large deformation of the fuel tank. By using a specific device to extrude a predetermined area on the inner surface of the preformed half-shell in a molten state, a reinforcing rib structure, such as the vein structure of a Victoria amazonica leaf, is generated on the inner surface of the preformed half-shell. This solution has low cost, high manufacturing stability, and minimal volume impact, making it highly competitive in the market.

A rocket engine using expander bleed cycle includes an aerospike nozzle to thereby maintain optimal performance even in an environment where the atmospheric pressure varies. A rocket engine includes: a regenerative cooling nozzle; at least one turbine that rotates by fuel vapor vaporized in the regenerative cooling nozzle; a fuel transfer turbopump that is driven by the turbine; an oxidizer transfer turbopump that is driven by the turbine; and a combustion chamber in which an oxidizer and a fuel are mixed and burned. In the rocket engine, the regenerative cooling nozzle is shaped into an aerospike nozzle, and the rocket engine uses an expander bleed cycle that discharges fuel vapor vaporized in the regenerative cooling nozzle, after use, to outside of the combustion chamber.

A method for a fuel system (18) for a vehicle, comprising: during a fuel system leak test and in response to an unintentional, temporary closing of a mechanical valve (106A, 106B, 108) coupled to a fuel tank (20), not terminating the fuel system leak test, characterized in that the fuel system leak test comprises: closing a tank vent valve (114) coupled between a fuel vapor reservoir (22) and the atmosphere; opening a purge valve (112) coupled between a fuel vapor reservoir (22) and an engine inlet; applying an engine inlet vacuum to the fuel tank (20) with the mechanical valve (106A, 106B, 108) open;and after installation, isolating the fuel tank (20) by closing the purge valve (112) while the mechanical valve (106A, 106B, 108) is still open, monitoring a vacuum drain in the fuel tank (20) and indicating a fuel system leak based on a vacuum drain rate.;

A hydrocarbon scrubber for an evaporative emission control system having an adsorbent composition including a polystyrene-divinylbenzene (PS-DVB) copolymer mixed with a polyurethane foam matrix wherein the scrubber is configured to adsorb fuel vapor bleed during hot-soak or diurnal conditions and maintain low flow restriction. The scrubber material can also be integrated into a vent line connected to a vent port of the canister in the evaporative emissions management system. The adsorbent material can also include a Graphene-derivative sorbent material in either of a polymer foam or extruded honeycomb design pattern specifically adsorptive of vaporized hydrocarbons for preventing bleed emissions while also providing low flow restrictions. The scrubber can include any combination of activated graphene-derivatives, lignocellulose, charcoal, ceramic, binder and flux material.

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.