385 results about "Gas engine" patented technology

The invention belongs to the related technical field of pressure tests, and particularly discloses a gas inlet pipeline test device for a gas generator, which comprises a first base and a second base, a round frame is fixedly mounted on one side of the upper end surface of the first base, an annular pipe is embedded in the round frame, and a connecting rod is mounted at one end in the annular pipe through an arranged telescopic mechanism. The outer side of the connecting rod is externally connected with a ring rod through an inner chuck fixedly connected in a sleeving mode, a sealing rotating ring is arranged on the outer wall of one side of the round frame, a test air inlet pipe movably penetrates through the sealing rotating ring in a penetrating mode, and a particle feeding simulation mechanism is arranged at the end, away from the sealing rotating ring, of the test air inlet pipe. By simulating multi-field coupling environments such as pressure fluctuation, particle scouring and mechanical vibration under real working conditions, the problem that data deviation is large due to the fact that complex working conditions cannot be reproduced in a traditional test is solved, and precise detection and full-life-cycle evaluation of the performance such as wear resistance, pressure resistance and blockage resistance of the pipeline are achieved.

A gas-fired heat pump unit that directly utilizes engine waste heat and features adjustable air supply is disclosed. The condenser and water supply and return lines are combined with refrigerant and coolant heat exchange lines. Refrigerant flows from the quasi-two-stage compressor outlet through the refrigerant heat exchange line, dividing it into a main path and an auxiliary path. The auxiliary path connects to the quasi-two-stage compressor air supply port after passing through a first electronic expansion valve and a flue gas heat exchanger. The main path, switched by a four-way reversing valve, can control forward and reverse circulation between the second electronic expansion valve and the outdoor evaporator. The outlet is connected to the quasi-two-stage compressor inlet. Coolant flows from the gas engine outlet through a coolant circulation pump and the coolant heat exchange line back to the inlet. The gas engine exhaust port is connected to the flue gas heat exchanger. Compressor air supply is simple and highly adjustable. The condenser utilizes stepped heating to decouple engine waste heat from compressor power. Heating is continuous during reverse cycle defrosting, improving indoor thermal comfort.

The invention relates to the technical field of gas engines, and particularly discloses an anti-deformation and high-cooling-efficiency backflow combustion chamber large elbow, the sections of a first layer wall and a second layer wall of the large elbow are arc-shaped, the first layer wall is arranged outside the second layer wall, one end of the first layer wall and one end of the second layer wall are fixedly connected into a whole, and the other end of the first layer wall is arranged outside the second layer wall. The other end of the first layer wall and the other end of the second layer wall are clamped, a space capable of moving relative to each other is formed in the clamping position, a plurality of annular grooves facing the second layer wall are formed in the first layer wall, the annular grooves are attached to the side, facing the first layer wall, of the second layer wall, and a cavity between the first layer wall and the second layer wall is divided into a plurality of impact diffusion cavities through the annular grooves. According to the invention, the gap between the double walls is not changed, the problem of deformation caused by stress due to inconsistent swell capacity of the double walls is prevented, the cooling protection effect of the inner wall is enhanced, cracks caused by too high temperature of the large elbow are prevented, the overall stress is small, cracks are not easy to appear at welding joints, tight connection is realized, and air leakage is not easy.

The invention discloses a fuel supply system, a fuel mixing method and a gas engine, and relates to the technical field of gas engines. The fuel supply system comprises a first fuel supply module, a second fuel supply module and a combustion module, and the first fuel supply module is used for mixing gas fuel with air to form first mixed gas with the gas fuel concentration lower than an ignition limit value; the second fuel supply module provides second mixed gas with the gas fuel concentration higher than the ignition limit value; the output end of the second fuel supply module communicates with the output end of the first fuel supply module, so that the first mixed gas and the second mixed gas are mixed, combustible mixed gas with the gas fuel concentration within the ignition limit value is formed, and the output end of the first fuel supply module further communicates with the combustion module so that the combustible mixed gas can be input into the combustion module. According to the fuel supply system, the tempering combustion range of the engine can be limited between the first fuel supply module and the combustion module, and the explosion risk is reduced.

The invention discloses a heating control method for an engine gas delivery pipeline of a marine gas generator set, which relates to the technical field of marine gas power systems, and comprises the following steps: collecting multi-dimensional environment state information of the gas delivery pipeline in real time, analyzing gas components and pressure fluctuation data, and calculating the temperature of the gas delivery pipeline; a theoretical dew point temperature and a potential paraffin precipitation temperature under real-time pressure are calculated by combining a fuel gas physical property database, a real-time heat exchange model is constructed by combining a pipeline outer wall temperature gradient and a cabin environment temperature, theoretical temperature attenuation curves of different positions of fuel gas in a pipeline are obtained, condensation and paraffin precipitation risk positions and degrees are predicted after comparison, and a real-time heat exchange model is established. And differential electric heat tracing control strategies of different sections of the pipeline are generated in combination with relative humidity data of the cabin. The method can adapt to the real-time physical property of gas and the heat exchange state of the pipeline section, and the heating control execution mode of the gas pipeline is optimized.

The utility model belongs to the field of mounting structures, and particularly relates to a mounting structure of a supercharger of a low-calorific-value gas engine, which comprises the supercharger, a mounting seat, a mounting mechanism and a loosening mechanism, the mounting seat is arranged on the supercharger, the mounting mechanism is arranged on the mounting seat, the loosening mechanism is mounted on the mounting seat, and the loosening mechanism is arranged on the mounting seat. The mounting mechanism comprises a mounting hole and a fixing bolt, the mounting hole is formed in the mounting seat, the fixing bolt used for fixing the supercharger is mounted in the mounting hole, the loosening mechanism comprises a rotating rod and a limiting pressing plate, the rotating rod is rotatably mounted on the mounting seat, the limiting pressing plate is fixedly mounted on the rotating rod, and the limiting pressing plate is fixedly mounted on the rotating rod. The limiting pressing plate makes contact with the top of the fixing bolt, and a rotating groove is formed in the mounting base. The fixing device is reasonable in design, the supercharger can be fixedly installed through the fixing bolt, the fixing bolt can be prevented from loosening through the limiting pressing plate, and therefore the purpose of improving the stability of the supercharger can be achieved.

The invention provides an intelligent driving and energy optimizing system for a parallel hybrid heavy truck, which relates to the field of hybrid heavy trucks and comprises a power battery, a motor, a gas engine, a controller and a sensor. The sensor collects vehicle operation parameters in real time, and the controller controls the working state of each component according to the parameters. The system has various working modes of pure electric starting, engine intervention control and the like, and has the advantages that the problem that an existing hybrid heavy truck is poor in power coordination is solved through precise cooperation of the sensor and the controller, the energy utilization efficiency is improved through the multiple working modes, pure electric starting, reasonable engine intervention and a battery charging strategy are achieved, and the energy utilization efficiency is improved. Energy waste is avoided, energy consumption is reduced, driving modes are intelligently switched, the system adapts to different road conditions and loads, it is guaranteed that power is strong, kinetic energy is recovered by a motor when an energy recovery system goes down a slope, the kinetic energy is assisted by a gas engine when the kinetic energy is insufficient, the energy utilization rate is greatly increased, the driving mileage is prolonged, and energy conservation and consumption reduction are achieved.

The utility model belongs to the technical field of engines, and particularly relates to an anti-seismic structure of a high-power vehicle-mounted gas engine unit, which comprises a high-power vehicle-mounted gas engine unit body, and a fixing seat and a mounting seat which are used for performing anti-seismic use on the high-power vehicle-mounted gas engine unit body, four grooves and four sliding grooves are formed in the top of the mounting seat, first anti-seismic units are arranged among the grooves, the mounting seat and the fixing seat, and second anti-seismic units are arranged among the sliding grooves and the fixing seat. The high-power vehicle-mounted gas engine unit is reasonable in structural design, vibration generated by the high-power vehicle-mounted gas engine unit body can be subjected to multiple damping counteracting under the combined action of the damping steel plate, the four first anti-seismic units and the four second anti-seismic units, the anti-seismic effect is better, the operation stability of the high-power vehicle-mounted gas engine unit body is guaranteed, and the service life of the high-power vehicle-mounted gas engine unit body is prolonged. The service life is prolonged, and the reliability is high.

The invention discloses a gas engine cold start difficulty diagnosis method, system and device and a readable storage medium, and relates to the field of cold start fault detection, and the method specifically comprises the steps: determining an initial idle speed segment based on a real-time vehicle speed, a real-time engine rotation speed, a neutral gear signal and a clutch signal when the lowest environment temperature is detected to be smaller than a preset environment temperature threshold value; the initial idling segment is a working state when the vehicle is static and an engine is in an idling mode; in the initial idle speed segment, based on the maximum value of the engine rotating speed, the real-time engine rotating speed, the real-time gas rail pressure, the real-time gas rail temperature, the engine water temperature at the starting point of the initial idle speed segment, the real-time accelerator opening degree and the fault code, the cold start difficulty result of the gas engine is determined; the fault code is a corresponding fault code when the pressure of the intake manifold is smaller than a preset pressure threshold value of the intake manifold. According to the invention, specific faults of cold start difficulty can be identified efficiently and accurately.

The invention discloses a method and device for calculating pressure after air filtration and a gas engine. The accuracy of pressure calculation after air filtration can be improved. The method for calculating the post-air-filtering pressure comprises the steps that at the starting node of a target driving cycle, the first pressure difference between the gas inlet pressure and the post-air-filtering pressure is obtained; in the driving process of the target driving cycle, a second pressure difference between the gas inlet pressure and the air-filtered pressure is obtained; based on the first pressure difference and the second pressure difference, a pressure difference change value is obtained; wherein the pressure difference change value comprises a difference value between the first pressure difference and the second pressure difference; and the pressure difference change value serves as the pressure after air filtering, and the absolute pressure after air filtering is obtained.

The present invention pertains to arrangements for a pre-chamber of a combustion engine as well as pre-chambers comprising such arrangements, in particular to avoid or impair backfiring or flashbacks of a combustible mixture and / or to enable a flame retardation within a respective pre-chamber. Accordingly, an arrangement for a pre-chamber gas valve of a combustion engine, preferably a gas engine, is suggested, which comprises a housing having an outer surface and comprising a channel, wherein a first end of the channel is in fluid communication with the outer surface and a second end of the channel is connectable to a valve seat of the pre-chamber gas valve. The arrangement furthermore comprises a plurality of protrusions extending radially outward from the outer surface of the housing. The first end of the channel is arranged upstream of the second end of the channel and downstream of the protrusions, wherein the protrusions are spaced apart from each other in a circumferential direction and define a respective cavity between respective adjacent protrusions, each cavity having an extension being larger in a radial direction and / or axial direction than an extension in the circumferential direction.

The present application relates to the technical field of engine, and discloses a combustion system, a gas engine and a combustion system design method, a second fuel injection hole sprays an oil jet to ignite a part of natural gas jets on the same side of the second fuel injection hole, and under the action of a vortex in a combustion chamber, with the second fuel injection hole continuously spraying the oil jet, a flame formed by the oil jet igniting the natural gas jets gradually becomes longer along the vortex direction, so that the oil jet sprayed by the second fuel injection hole ignites the natural gas jets on the side of the natural gas injector opposite to the fuel injector; the oil jet sprayed by the first fuel injection hole ignites the remaining natural gas jets, so that the oil jets sprayed by the fuel injector on both sides of a reference line can achieve the maximum ignition effect, all the natural gas jets are ignited by using the least oil jet, the ignition effect of igniting the natural gas by using the fuel is improved, the thermal efficiency is higher, and the emission is lower.

The invention provides a gas engine lubricating oil composition and a preparation method thereof. The gas engine lubricating oil composition of the present invention comprises: (A) an alkyl phosphate compound; (B) alkylated diphenylamine; (C) a polyisobutylene succinic acid pentaerythritol ester dispersing agent; (D) a salicylate and / or sulfonate; (E) zinc dialkyl dithiophosphate; (F) an oil-soluble organic molybdenum friction modifier; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a major amount of a lubricating base oil. The gas engine lubricating oil composition disclosed by the invention has excellent high-temperature oxidation resistance, cleaning performance, extreme pressure anti-wear performance and anti-corrosion performance.

The application belongs to the technical field of lubricating oil, and specifically provides a gas engine lubricating oil and a preparation method thereof.The gas engine lubricating oil comprises the following raw materials: ester base oil, anti-wear agent, dispersant, pour point depressant and antifoaming agent, wherein the ester base oil is prepared by esterification reaction of polyhydric alcohol and fatty acid; the preparation method of the anti-wear agent comprises the following steps: first, reacting acrylic acid with vinyl imidazole to prepare a modifier; then, polymeric phenol is obtained by polymerization of phenol under the action of a catalyst; finally, the polymeric phenol, boric acid and vegetable oil are reacted, the modifier is added after a certain time of reaction, and the reaction is continued to obtain the anti-wear agent.The preparation method of the gas engine lubricating oil of the application is that the raw material components are uniformly mixed according to the formula, and the gas engine lubricating oil of the application has good wear resistance, oxidation resistance, high-temperature detergency and thermal stability.

The present application relates to a deflagration venting device, a gas engine, and a generator set, and relates to the technical field of engines. The deflagration venting device includes a deflagration venting valve. A blocking assembly is provided on one side of the deflagration venting valve. The blocking assembly includes a blocking box. The deflagration venting valve communicates with the blocking box. Connecting pipes are provided on opposite side walls of the blocking box, and the connecting pipes communicate with the blocking box. A blocking block is provided in the blocking box. The blocking block is slidably connected to the inner wall of the blocking box along the axial direction of the connecting pipe. One side of the blocking block is spaced from the corresponding inner side wall of the blocking box. When the blocking block slides in the blocking box to one side of the blocking box, the blocking block closes the corresponding connecting pipe. The generator set uses a gas engine equipped with the deflagration venting device. By providing the blocking assembly and the deflagration venting valve, when deflagration occurs, the blocking assembly can cut off the gas transmission pipeline, and the deflagration venting valve can vent the high-pressure gas generated in the blocking box, thereby improving the safety of the equipment.

The application discloses a kind of single-shaft combustion engine natural gas filter filter core cleaning device, it is related to filter core cleaning technical field, including support seat and top frame, first runner and cleaning assembly are rotatably installed on the support seat, drum is installed on first runner, support assembly is arranged below first runner, cleaning pipe is installed above the drum, spray hole is opened in cleaning pipe, drive assembly is installed on the top frame, first magnetic block is connected below drive assembly, copper pipe is arranged on the outside of first magnetic block, second magnetic block and support ring are respectively arranged on the upper and lower sides of copper pipe, third magnetic block is fixedly connected on the inner wall of support ring, third motor is installed on support ring, first docking block is connected on the output shaft of third motor.The application solves the problem that the existing filter core cleaning device cannot automatically activate the vibration structure to vibrate the filter core to improve the cleaning effect during cleaning, and cannot reduce the transmission of ineffective vibration energy during cleaning.

Disclosed herein is a work machine having a gas engine and a gas storage system having at least one gas storage tank. The controller is provided with a controller configured to determine a leakage condition within the gas storage system and / or the gas engine.

The utility model relates to a misfire diagnosis system for a marine gas engine, and relates to the technical field of monitoring of marine gas engines, the misfire diagnosis system comprises an engine exhaust header pressure sensor and an engine electronic control unit, the engine exhaust header pressure sensor is arranged on an exhaust pipe of the engine and is used for collecting exhaust pressure waveform data in real time, and the engine electronic control unit is used for monitoring the exhaust pressure waveform data; the engine electronic control unit receives pressure waveform data from the engine exhaust manifold pressure sensor. According to the misfire detection system for the marine fuel engine, the exhaust header pressure wave signal is selected as a signal source, engine misfire monitoring and diagnosis can be carried out, and the requirement for stable operation of the marine engine is met.

The invention discloses an integrated energy supply system based on a gas engine waste smoke hydrogen energy storage system, which relates to the field of energy supply. The total amount of waste smoke of the gas engine is calculated, and the first amount of flue gas required by the chilled and hot water unit is calculated. When the total amount of waste smoke of the gas engine is less than or equal to the first amount of flue gas required by the chilled and hot water unit, all the flue gas is introduced into the lithium bromide absorption type chilled and hot water unit. If it is greater than the first amount of flue gas required by the lithium bromide absorption type chilled and hot water unit, the remaining flue gas is introduced into the waste smoke boiler to generate steam. The second amount of flue gas discharged from the hydrogenation reaction combustion furnace and entering the waste smoke boiler is determined, the total amount of flue gas entering the waste smoke boiler is calculated, the amount of natural gas raw material required is calculated according to the mass flow rate of steam and the total carbon flow rate in natural gas, and natural gas is introduced into the hydrogenation reaction combustion furnace according to the amount of natural gas raw material. The invention integrates the cold, heat and power cogeneration of natural gas reforming hydrogen production equipment, waste smoke boilers, gas engines, etc. and can be directly applied to building energy supply, and forms an effective recycling.

A method for expanding features of a gas engine replacement device that drives power equipment including controlling, by an electronic processor of the gas engine replacement device, a power switching network to selectively provide power from a battery pack to rotate a motor of the gas engine replacement device. A module interface of the gas engine replacement device receives an external electronics module. A type of the external electronics module received by the module interface is detected by the electronic processor of the gas engine replacement device. The gas engine replacement device is configured by the electronic processor based on the type of the received external electronics module. The electronic processor communicates with the external electronics module via the module interface.

The invention relates to the technical field of hoisting equipment control, in particular to a double-beam crane control device for a lifting gas engine unit of a power plant, which comprises the following modules: a load stabilizing module for monitoring the tension difference and the swing amplitude of a hoisting cable in real time and starting an automatic adjusting function when the tension difference and the swing amplitude exceed a set threshold value; the path planning module is used for generating a hoisting path according to the weight and the size of the gas engine unit and adjusting the path when an obstacle or working condition change is detected; the dynamic balance module is used for monitoring the vertical offset and the vibration condition of the gas engine unit, and the alarm prompting module is used for sending out an acousto-optic warning signal when an abnormal condition occurs in the hoisting process; according to the method, intelligent feedback control, self-adaptive path planning and high-precision positioning technologies are introduced, so that the defects in the aspects of load stability, dynamic balance control and complex working condition adaptability in the prior art are overcome, and the safety and high efficiency of the gas engine unit in the hoisting process are ensured.

The utility model is suitable for internal combustion engine gas supply mechanism technical field provides a kind of multi-point injection air intake pipe of gas machine, comprising: main pipeline, its one side is equipped with air inlet, the other side of main pipeline is equipped with several air intake manifold, each air intake manifold is equipped with air jet nozzle, the flow direction of the gas in the inside of air jet nozzle and air intake manifold has certain angle, air intake manifold and main pipeline use integrated structure, by this, the utility model is guaranteed by setting integrated air intake structure, the reliability of air intake, while setting a kind of separate air jet structure, to ensure the separate control to engine, optimization control effect.

The utility model discloses a high-power pure vaporizer, and belongs to the technical field of fuel supply of gas engines. The engine comprises a body, a throat pipe, a throttle valve, a variable frequency motor, an air inlet cavity and a multi-channel air inlet structure (a high-speed air inlet channel, a medium-speed air inlet channel and a low-speed air inlet channel). Through the caliber gradient design (high speed > medium speed > low speed) of each channel and outlet position optimization (high speed is in the middle, the medium speed is close to the lower part and the low speed is close to the upper part), and in combination with a throttle valve and a limiting adjusting mechanism driven by a variable frequency motor, dynamic adjustment of gas flow under different working conditions is realized, the mixing efficiency is improved, the energy consumption is reduced, and the emission standard is met.

To provide a gas engine capable of supplying a large volume of hydrogen to a combustion chamber and suppressing increase in manufacturing cost.SOLUTION: A gas engine that burns fuel gas including hydrogen in a combustion chamber includes: an intake line in which an intake flow passage is formed, the intake flow passage including an intake port opened in the combustion chamber; a fuel supply line provided separately from the intake line, the fuel supply line having a fuel flow passage in which fuel gas flows toward the combustion chamber and an outlet of the fuel flow passage opened in the combustion chamber; a solenoid valve provided in the fuel supply line to open / close the fuel flow passage; and a check valve provided on the combustion chamber side in the fuel supply line of the solenoid valve to open / close the fuel flow passage by using differential pressure between the fuel flow passage and the combustion chamber.SELECTED DRAWING: Figure 1

A high-power gas engine cylinder head, comprising a cylinder head body (1) provided with a water cavity, and a mounting seat (3) located in the water cavity, wherein an annular cavity is formed between the mounting seat (3) and the water cavity; a middle partition plate (2), which is of a spherical structure and divides the water cavity into an upper water cavity (11) and a lower water cavity (12), is provided in the water cavity; a cooling water hole (4) in communication with the lower water cavity (12) is provided in the bottom of the cylinder head body (1); and the lower water cavity (12) is in communication with the upper water cavity (11). The middle partition plate (2) realizes effective cooling of an exhaust valve mounting seat (32) by means of providing a cooling hole (321), and further improves cooling of the cylinder head body (1) by means of providing the cooling water hole (4), thereby reducing heat load; and the spherical middle partition plate (2) can uniformly disperse pressure, improve mechanical load bearing capacity, and further improve the rigidity and strength of the cylinder head, thereby improving the reliability of the cylinder head, and prolonging the service life of the cylinder head.

The utility model belongs to the technical field of fasteners, and particularly discloses a novel nut structure which comprises a nut body, a chambering port and an anti-rotation hook head, the nut body is communicated with the chambering port, internal threads are arranged on the inner side of the nut body, the chambering port is fixedly connected to one end of the nut body, and the anti-rotation hook head is fixedly connected with the chambering port. The anti-rotation hook head is fixedly connected to the outer side of the nut body and extends towards one end of the reaming port, circumferential limiting of the nut body and rotation limiting of the nut body can be achieved, the reaming port can be used for reaming after assembly to achieve interference fit, axial movement is limited, single-side fixing is achieved, and after double-side fixing is matched, the anti-rotation hook head can be used for fixing the nut body. When the gas turbine is assembled or repaired, the gas turbine can be disassembled from the other side, so that space limitation on the side where the chambering port is located is avoided, and disassembly, assembly and maintenance are not affected, the assembly space is effectively limited, the number of disassembled parts in the assembly or maintenance process is reduced, time is saved, assemblability and maintainability are guaranteed, and the maintenance cost of the gas turbine is reduced.

An off-highway machine comprising a gas engine and an array of storage tanks 18a-18c for supplying gaseous fuel to the engine. The tanks are oriented such that the first end of each tank is on the sam

The utility model provides a high temperature resistant gas engine valve seat ring, which relates to the technical field of valve seat rings, and comprises a gas engine body, the top of the gas engine body is provided with a valve opening, a seat ring body is embedded in the valve opening, and the surface of the seat ring body is sequentially sleeved with a wear-resistant layer and a high temperature resistant layer from outside to inside. An L-shaped groove is formed in the side, close to the valve opening, of the top of the gas engine body, and an L-shaped plate is embedded into the L-shaped groove. The wear-resistant layer and the high-temperature-resistant layer are sequentially arranged on the surface of the seat ring body from outside to inside, so that the wear-resistant and high-temperature-resistant performance of the seat ring body can be improved, the service life of the seat ring body can be prolonged, and when the seat ring body needs to be detached, the seat ring body can be detached by pushing the L-shaped plates to move, so that the service life of the seat ring body is prolonged. At the moment, an arc groove in one end of the L-shaped plate can extrude the bevel edge of the edge of the seat ring body, the effect of conveniently taking out the seat ring body can be achieved, and therefore the effect of conveniently replacing the seat ring body can be achieved.

The utility model relates to a multi-sparking plug ignition system, combustion chamber and gas engine, multi-sparking plug ignition system includes precombustion chamber and second sparking plug, precombustion chamber is provided in dome structure center, precombustion chamber is provided with first sparking plug, precombustion chamber is provided with a plurality of jet orifice at interval along the circumference, second sparking plug is provided with second sparking plug. At least one spray hole points to a high-frequency detonation area near an exhaust throat of an exhaust passage in the combustion chamber, the second spark plug and the pre-combustion chamber are arranged between the air inlet passage and the exhaust passage in a spaced mode, and the second spark plug is close to the edge of the dome structure. The high-speed jet jetted by the pre-combustion chamber in the multi-spark-plug ignition system enables flame to reach the edge of the combustion chamber as soon as possible, and the second spark plug can accelerate combustion in the nearby space, so that the multi-spark-plug ignition system can effectively improve the flame propagation speed, shorten the time for the flame to propagate to the edge of the combustion chamber and improve the combustion efficiency. Flame can reach the edge of a combustion chamber of an engine as soon as possible, and the aim of reducing the knocking tendency is achieved.

Disclosed is a method of controlling fuel injection in a fuel gas powered internal combustion engine. Injection events are performed by applying a drive signal to a fuel injector. The drive signal has a profile including a first phase, wherein a first voltage, boost voltage V1, is applied to the fuel injector to regulate a drive current at a first level, opening current I1, during a first period T1; a second phase, wherein the current is decreased to second level I2, about zero, during a time period T2 in order to decelerate the valve member in its opening stroke; a third phase, wherein a third voltage V3 is applied to the fuel injector to regulate a drive current at a third level I3 during a third period T3, the third phase being configured to deliver sufficient energy to open and stabilize the valve member in its open position, preventing bounce of the injector needle on reaching opening; a fourth phase, wherein a fourth voltage, battery voltage V4, is applied to the fuel injector to regulate a drive current at a fourth level, hold current I4, during a fourth period T4. The method allows gaseous fuel injection of a direct injection gas engine by controlling a solenoid injection valve so that the valve does not bounce on reaching the fully open position. A gaseous fuel delivery system using the method is also disclosed.