46results about "Condensed fuel collection/return" patented technology

The invention provides a stop device for abnormal fuel oil return of a fuel injection pump of a diesel engine, which comprises an oil return stop valve, the oil return stop valve comprises a valve body and a valve core in the valve body, one end of the valve body corresponding to the valve core is provided with a control cavity, the other end of the valve body is provided with an elastic control piece, and the valve body corresponding to the control cavity is provided with a filter oil return port butt joint hole. A stop piece is arranged on the side, close to the valve element, of the control cavity, meanwhile, an oil inlet and an oil return opening are formed in the positions, corresponding to the valve element, of the valve body, and in the normal state, the valve element is pressed by the elastic control piece and abuts against the stop piece, so that the oil inlet and the oil return opening are not communicated. The oil return stop valve controlled by diesel oil pressure is additionally arranged in the oil return pipe, opening and closing of the oil return stop valve are controlled by oil outlet pressure of the fuel filter, cost rise caused by improvement and change of the oil sprayer is effectively reduced, and the requirement for generalization is met. Return oil of the fuel filter directly returns to the inlet end of the low-pressure diesel pump, so that the problem of backflow of the outer oil tank due to high liquid level during parking is effectively solved.

Procedure for diagnosing a fault in a dual flushing system, comprising: Detect, by means of a control (CLR), a pressure in a fuel tank (10) in which vapor gas is collected, measured by a fuel tank pressure sensor (11) when a turbocharger (90) is operated for boosting and a purge valve (30) is actuated; Diagnosing, by the control unit (CLR), a current situation as a fault situation in which an engine vacuum generating line (40) connected between the purge valve (30) and a front end of an expansion tank (50) remains open when a pressure change value calculated on the basis of the fuel tank pressure (10) exceeds a reference value; Output, by the control system (CLR), of a warning regarding an error situation when an error is detected; and Diagnosing, by the control (CLR), the current situation as a fault situation in which a forced vacuum generating line (70) remains closed when the pressure change value calculated on the basis of the pressure difference of the fuel tank (10) is within a reference range that is smaller than the reference value, wherein a return flow line (80) is connected between a front end of the turbocharger (90) and a front end of a throttle valve (60) and the forced vacuum generating line (70) is connected between the purge valve (30) and a section connected to the front end of the turbocharger (90) and the return flow line (80) to collect the vaporizing gas in a container (20) which is operated to be selectively purged into one of the two lines, and where the current situation is diagnosed as a fault situation in which an ejector (81) connected between the forced vacuum generation line (70), the return flow line (80) and the turbocharger (90) remains closed.

The utility model discloses a skid-mounted BOG (Boil Off Gas) treatment system of a dual-fuel ship. The skid-mounted BOG treatment system comprises a BOG main treatment system and an auxiliary system, the BOG main treatment system comprises a BOG preheater, a BOG suction port tank, two compressors, a primary oil-gas separator, a BOG cooler and a secondary oil-gas separator; an inlet of the BOG preheater is connected with a BOG supply port, an outlet of the BOG preheater is connected with an inlet of the BOG suction port tank, and an outlet of the BOG suction port tank is connected with air inlets of the two compressors; outlets of the two compressors are connected with an inlet of the first-stage oil-gas separator; an outlet of the first-stage oil-gas separator is connected with an inlet of the BOG cooler; an outlet of the BOG cooler is connected with an inlet of the second-stage oil-gas separator, and an outlet of the second-stage oil-gas separator is connected with an inlet of a gas user pipeline on a ship. The auxiliary system comprises a heat exchange medium system and a lubricating oil circulation system. According to the utility model, the cost can be reduced, and the BOG treatment efficiency can be improved.

The invention relates to the technical field of vehicles, and discloses a carbon-free tank type oil gas recovery system and a vehicle, the carbon-free tank type oil gas recovery system comprises a high-pressure fuel tank, the high-pressure fuel tank is used for storing fuel oil and sealing gasoline steam in the fuel tank; the condenser is connected with an internal gas chamber of the high-pressure fuel tank through a gas inlet pipe and is used for receiving and condensing fuel steam from the high-pressure fuel tank; the recovery pipeline is connected between the condenser and the high-pressure fuel tank and is used for guiding liquid fuel formed after condensation into the high-pressure fuel tank; the one-way valve is arranged on the recovery pipeline and is used for preventing the fuel steam from flowing back through the recovery pipeline; and the high-pressure fuel tank isolation valve is communicated to one end, close to the recovery pipeline, of the condenser, and is used for controlling the pressure release and sealing of the high-pressure fuel tank. Oil gas is recovered for the plug-in hybrid electric vehicle through the design of the carbon-free tank.

A method for operating a fuel system (18) including a fuel tank (20) coupled to a fuel vapor activated carbon canister (202) via a shut-off valve (110), comprising: Purging fuel vapors from the charcoal canister (202) to an internal combustion engine inlet (23) for a duration with the shutoff valve (110) open until a threshold level of fuel tank vacuum is generated, the duration being based on a purge flow rate and a fuel tank vacuum level, and Purging fuel vapors after the duration from the activated carbon canister (202) to the internal combustion engine inlet (23) with the shut-off valve (110) closed, while simultaneously applying the generated fuel tank vacuum to the fuel system (18) to identify a fuel system leak.

The invention discloses a leakproof fuel pump pressure regulating valve, and belongs to the technical field of fuel pump pressure regulating valves, the leakproof fuel pump pressure regulating valve comprises a pressure regulating valve body mounted on a fuel pump, an oil inlet pipe is arranged on the outer side of the lower part of the pressure regulating valve body, and an oil discharge pipe is arranged at the lower end of the pressure regulating valve body; a limiting fixing plate is fixedly arranged on the outer side of the oil inlet pipe, a sliding adjusting seat is arranged on the outer side of the limiting fixing plate, a reset spring is connected between the inner wall of the sliding adjusting seat and the limiting fixing plate, and locking clamping blocks are evenly, elastically and rotationally installed on the outer wall of the oil inlet pipe. And a sealing binding rope for fixing an external rubber pipe is connected between the two symmetrically arranged locking clamping blocks. According to the leakproof fuel pump pressure regulating valve, stable pipeline connection can be achieved through multiple locking mechanisms, the sealing performance of the connecting position is effectively guaranteed, secondary auxiliary fastening can be conducted when oil pressure is too high, leakage is avoided when the oil pressure is too high, and the safety of a fuel pump in the using process is improved.

Method for a power machine (10) comprising the following: Adjusting exhaust gas recirculation (EGR) based on a flow rate at an ejector intake port, wherein the flow rate is based on a flow characteristic of the ejector (36) and a flow characteristic of a power engine system and not on sensor measurements, wherein an outlet of the The power engine system is coupled to the ejector intake channel; and further comprising compensating a measurement of a gas component sensor arranged in a power engine inlet downstream of an outlet of the ejector (36) on the basis of the flow rate at the ejector intake channel.

To provide a fixation prevention device for a pump that can prevent fixation of a sliding part of the pump.SOLUTION: A fixation prevention device 90 for a pump comprises: a pump 772 for generating negative pressure; a recovered liquid generation part 91 connected to a fuel tank 80 storing fuel, for cooling evaporated fuel generated in the fuel tank 80, condensing and recovering a low boiling point component of the fuel contained in the evaporated fuel, and generating recovered liquid; a first pipe 92 for establishing communication between a discharge port of the recovered liquid generation part 91 and a recovered liquid suction port 772d of the pump 772; a first opening / closing valve 95 for opening and closing the discharge port of the recovered liquid generation part 91; and a second opening / closing valve 96 for opening and closing the recovered liquid suction port 772d of the pump 772. When a predetermined cleaning control execution condition including an engine stop is established, an ECU 50 opens each of the first opening / closing valve 95 and the second opening / closing valve 96, drives the pump 772, and allows the recovered liquid to be sucked into the pump 772 through the first pipe 92.SELECTED DRAWING: Figure 4

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.

A fuel system of an emergency diesel power generator set for a nuclear power station, comprising a diesel engine (1), an internal circulation unit (2), a leakage fuel unit (3), a fuel conveying unit (4), a daily fuel tank (46), a fuel tank truck fuel discharging unit (5), and a main fuel storage tank (53), wherein a fuel inlet pipe (14), fuel injection pump fuel discharging pipes (15), and a high-pressure fuel pipe leakage pipe (16) are provided in the diesel engine (1), and a fuel booster pump (11) and a fuel duplex filter (12) are connected in series on the fuel inlet pipe (14); the fuel injection pump fuel discharging pipes (15) are connected to dirty fuel drums (13); the high-pressure fuel pipe leakage pipe (16) conveys return fuel to the leakage fuel unit (3); the internal circulation unit (2) comprises a standby fuel booster pump (23), a first fuel duplex coarse filter (22), and a return fuel cooler (21); the internal circulation unit (2) achieves fuel supply from the daily fuel tank (46) to the diesel engine (1), and when the return fuel of the diesel engine is cooled, conveys said return fuel to the daily fuel tank (46); the fuel conveying unit (4) is connected to the main fuel storage tank (53) and the daily fuel tank (46), and the fuel tank truck fuel discharging unit (5) conveys, to the main fuel storage tank (53) from a fuel tank truck, the fuel that is filtered. By simplifying the system arrangement, the conveying and recycling functions of the fuel are achieved, and the fuel in the main fuel storage tank is heated to ensure safe and stable operation of the diesel engine.

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 invention discloses a novel low-pressure fuel system for a high-pressure common rail function and a corresponding diesel engine. The novel low-pressure fuel system comprises a daily fuel tank (1); the low-pressure fuel oil system integration module comprises a fuel oil coarse filter (2), a fuel oil filter (3) and a low-pressure fuel oil system integration module (4); an electric three-way control valve (3); a booster pump (4); a fuel oil fine filter (5); and the intelligent temperature control oil tank (6) is in modular design and is provided with a liquid level meter, and a liquid level signal of the liquid level meter is used for controlling switches of the electric three-way regulating valve and the booster pump, so that the oil return pressure of the oil sprayer is kept stable. The invention further discloses the corresponding diesel engine. According to the technical scheme, the oil return back pressure is stable, and the fuel oil temperature is stable.

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.

A fuel supply system according to the present invention comprises: a fuel tank in which fuel gas is stored, the fuel tank being capable of accommodating the boil-off gas of the fuel gas and purge gas that can be used for a purging operation; a fuel supply line for supplying fuel from the fuel tank to an engine; a purging gas generation part for generating purging gas suitable for use in the purging operation by using a mixed gas of the boil-off gas and the purge gas accommodated in the fuel tank; a purging line for purging the engine and a pipe with the purging gas generated by the purging gas generation part; and a recovery line connected to the purging line so that the purging gas used for the purging operation is recovered in the fuel tank.

The application discloses a marine methanol engine fuel supply device, which comprises a methanol storage tank, a methanol supply skid-mounted unit, a methanol delivery unit, a collecting tank, a delivery pump and a PLC controller, the methanol supply skid-mounted unit comprises a pressurizing pump, a pressure regulating valve, a filter, an air blower and a plurality of two-way electromagnetic valves which are arranged in a methanol supply skid-mounted shell, the methanol delivery unit comprises a two-way electromagnetic valve, a methanol fuel common rail pipe and a second manual valve, and signal lines of the PLC controller are connected with control ends of the two-way electromagnetic valves, a control end of the pressurizing pump, an inner cavity pressure sensor and an outer cavity pressure sensor of the methanol fuel common rail pipe respectively. The application improves the utilization rate of methanol fuel, ensures the safe operation of the marine methanol engine, further saves the use cost of methanol fuel and effectively avoids the poisoning risk caused by methanol fuel leakage.

To provide a vapor separator tank capable of holding a pressure regulator with a simple structure and suppressing increase in the number of components, assembling man-hours, and manufacturing cost.SOLUTION: The VST (vapor separate tank) 10 includes a casing 20 that has a lower case 22 and an upper case 24 joined to each other and in which a fuel storage chamber 26 for storing liquid fuel is formed, a pump 40 that is disposed in the casing 20 and pumps the liquid fuel stored in the fuel storage chamber 26, and a regulator (pressure regulator) 50 that is sandwiched between the lower case 22 and the upper case 24 in an accommodation space formed in the casing 20 and adjusts the discharge pressure of the pump 40 to be constant. The casing 20 includes the regulator support 70, which contacts and supports the regulator 50.SELECTED DRAWING: Figure 5

A system includes a fuel tank and a fuel vapour cooling arrangement connected to the fuel tank. The fuel vapour cooling arrangement is arranged to receive fuel vapour evaporated from the fuel in the fuel tank. In the fuel vapour cooling arrangement, the evaporated fuel is condensed into liquid fuel. The fuel vapour cooling arrangement is arranged outside of the fuel tank. A valve is arranged between the fuel tank and the fuel vapour cooling arrangement to control the opening and closing of the connection between the fuel tank and the fuel vapour cooling arrangement.

The present invention relates to a volatile organic compound (VOC) fuel supply system and method for supplying VOCs to an engine fuel, and to a VOC-fueled ship. The VOC fuel supply system according to the present invention includes an engine that uses gas as fuel and operates in a gas fuel mode; a VOC supply unit that supplies volatile organic compounds (VOCs) as fuel to the engine; a fuel supply line that connects the VOC supply unit to the engine and is a path for transporting gaseous VOC fuel from the VOC supply unit to the engine; and a drain filter that is installed in the fuel supply line and filters out re-condensed VOCs in liquid state contained in the VOC fuel upstream of the engine.

The invention relates to the technical field of methanol steam recovery, and discloses a marine skid-mounted methanol steam recovery device, which comprises a shell arranged on a ship body, a multi-stage gradient refrigeration condensation unit and an adsorption unit are arranged in the shell, the condensation unit and the adsorption unit are respectively in independent modular arrangement, and the condensation unit is provided with a gas-liquid separator; the methanol steam enters a condensation unit and is sequentially subjected to gradient refrigeration for multiple times, so that water in the methanol steam is liquefied and separated, the methanol steam is partially liquefied to form methanol liquid and residual steam, and the methanol liquid and the residual steam are separated through a gas-liquid separator; the residual steam is used for adsorbing and filtering the methanol steam through an adsorption unit, so that tail gas discharged outwards is formed after the content of the methanol steam in the residual steam is lower than the set content; by means of the combined arrangement of the condensation unit and the adsorption unit for multi-stage gradient refrigeration, efficient recovery and treatment of methanol steam are achieved.

The invention belongs to the technical field of ship fuel supply, and discloses an ammonia fuel supply device and a ship. The device comprises an ammonia fuel storage module, an ammonia fuel supply module and an ammonia fuel treatment module, wherein the ammonia fuel storage module is used for storing ammonia fuel; the ammonia fuel supply module comprises a low-pressure pump, a buffer tank, a high-pressure pump, a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger are arranged in parallel, and the high-pressure pump selectively communicates with the first heat exchanger and the second heat exchanger; the ammonia fuel processing module is located at the downstream position of the engine and arranged between the second heat exchanger and the buffer tank. When the high-pressure pump communicates with the second heat exchanger, a backflow stream in the cavity of the engine is in heat conduction connection with an input stream flowing out of the buffer tank in the second heat exchanger. Through the arrangement, energy recovery can be realized, an additional cold source is prevented from being introduced, the energy consumption cost is reduced, and the requirements of a dual-fuel engine in development on ammonia fuel inlet temperature and pressure, backflow temperature control and purity can be met.

The present invention provides a fuel supply system that promotes the efficient use of fuel in hydrogen-powered engines while minimizing pressure increases within the fuel supply tank. [Solution] The fuel supply system comprises a fuel supply tank 2 for storing liquefied hydrogen, a fuel pump 4 located in the fuel supply passage R1, a branch passage R2, a gas-liquid separator 5 installed in the branch passage R2, a gas storage unit 6A for introducing and temporarily storing the hydrogen gas separated by the gas-liquid separator 5 and supplying it to a predetermined device 12 that uses hydrogen gas as fuel, a first control valve V1 located in the fuel supply passage R1, a second control valve V2 located in the branch passage R2, and a controller 10. The controller 10 opens the first control valve V1 with the second control valve V2 closed when the engine 11 is started to start the fuel pump 4, and closes the first control valve V1 to stop the fuel pump 4 from running and temporarily opens the second control valve V2 when the engine 11 is stopped.

This invention provides an ammonia-containing exhaust gas treatment system and its operation method. The system integrates combustion and reliquefaction processes. First, ammonia is separated from the ammonia-containing exhaust gas using a membrane separator. The remaining portion after ammonia separation is the mixed gas to be emitted. When the exhaust gas analyzer detects that the mixed gas meets emission standards, it is directly emitted into the environment. When the analyzer detects that the mixed gas does not meet emission standards, it is returned to the exhaust gas buffer tank. The reliquefaction process involves reliquefying, storing, and reusing the separated ammonia as fuel, turning waste into treasure and creating economic value. The combustion process involves the system fully combusting the ammonia exhaust gas, using liquid ammonia produced during reliquefaction as fuel. Based on this self-circulation, the two processes have advantages such as simple structure, synergy, and ease of installation, making them easy to widely promote.

The invention discloses a fuel supply system and method for a bulldozer in a cold region. The system comprises a main fuel tank, an auxiliary fuel tank and a fuel reversing valve. An oil outlet of the main oil tank is communicated with a first oil inlet of the fuel oil reversing valve; an oil return port of the main oil tank is communicated with a first oil return port of the fuel reversing valve; an oil outlet of the auxiliary oil tank is communicated with a second oil inlet of the fuel oil reversing valve; an oil return port of the auxiliary oil tank is communicated with a second oil return port of the fuel oil reversing valve; when the engine is started, the fuel oil reversing valve is in a state that the second oil inlet is communicated with the reversing valve oil outlet and the third oil return port is communicated with the second oil return port; after the engine is started for a first set time, the fuel oil reversing valve is in a state that a first oil inlet is communicated with an oil outlet of the reversing valve and a third oil return port is communicated with a second oil return port; and after the engine is started for a second set time, the fuel oil reversing valve is in a state that the first oil inlet is communicated with the reversing valve oil outlet and the third oil return port is communicated with the first oil return port. Diesel oil can be effectively prevented from being mixed.

A leak detection module may include a housing and a canister valve solenoid (CVS) arranged within the housing and in fluid communication along a first fluid passageway between canister and atmospheric ports. The leak detection module may include a second fluid passageway in parallel with the first fluid passageway and fluidly connected to the canister and atmospheric ports. A CVS check valve is arranged in the second fluid passageway and a volatile organic compound (VOC) gas sensor is arranged in one of the first and second passageways, configured to measure the concentration of hydrocarbons (HC) therethrough. A mass flow meter is arranged in one of the first and second passageways to determine a mass flow rate from the canister port to the atmospheric port. A controller measures the quality of the emissions by monitoring the HC and communicates the result to a base station.

To provide a drain treatment device capable of effectively utilizing an ammonia component of an ammonia-containing drain recovered from a fuel injection system of a marine diesel engine.SOLUTION: A drain treatment device, which is one embodiment of the present invention, includes: a recovery part which communicates with a fuel injection system for spraying ammonia fuel and fossil fuel into a combustion chamber of a marine diesel engine, and which recovers an ammonia-containing drain discharged from the fuel injection system; and a supply part that supplies an ammonia component, included in the recovered ammonia-containing drain, to one or more functional parts functioning by utilizing the ammonia component.SELECTED DRAWING: Figure 1

Provided is a blowdown treatment device capable of effectively utilizing ammonia components of ammonia-containing blowdown recovered from a fuel injection system of a marine diesel engine. A blowdown treatment device of one embodiment includes a recovery portion that communicates with a fuel injection system for injecting ammonia fuel and fossil fuel into a combustion chamber of a marine diesel engine, and recovers ammonia-containing blowdown discharged from the fuel injection system, and a supply portion that supplies ammonia components contained in the recovered ammonia-containing blowdown to one or more functional portions that function using the ammonia components.

In a VST (vapor separator tank), a lower case is provided with a plurality of attachment portions attached to an engine (internal combustion engine) and drain piping for discharging liquid fuel from a fuel storage compartment. The lower case includes a first bottom surface portion including a lowermost surface, a second bottom surface portion formed in a position higher than the first bottom surface portion and supporting a pump, and a third bottom surface portion formed in a position higher than the first bottom surface portion and the second bottom surface portion. Disclosed embodiments provide a vapor separator tank in which the capacity of a fuel storage compartment is sufficiently secured, and which allows easy arrangement of other equipment and parts around the vapor separator tank while enabling easy design change.

Multi-way emptying system (171) for a prime mover (112), comprising: an ejector (140) including a restriction (212), first and second inlets (142, 144), and an outlet (146) fixedly attached to an intake passage (118) of the engine (112); and at least one break point (203) at the constriction (212) or the inlets (142, 144), wherein the at least one break point (203) at the constriction (212) or the inlets (142, 144) includes a break point at the second inlet (144) and at the first inlet (142), wherein the thicknesses of the walls of the ejector (140) are reduced at the break points.

Air intake system (20) for an internal combustion engine (10), comprising the following: a vapor separation element (50) arranged in an inner part of an air inlet system (20), and a control (40); wherein the vapor separation element (50) is made of a flexible metal-organic framework material (51), MOF, wherein the flexible MOF material (51) is reversibly controllable; wherein the control unit (40) is operatively connected to the vapor separation element (50); wherein the control (40) generates a control pulse (52) which is transmitted to the vapor separation element (50), wherein the control pulse (52) comprises a first state and a second state; wherein the flexible MOF material (51) is configured to adsorb hydrocarbon vapor in response to the control pulse (52) being in the first state; and wherein the flexible MOF material (51) is configured to desorb hydrocarbon vapor when the control pulse (52) is in the second state.