49 results about "Fuel control unit" patented technology

The invention discloses a control method and a control device of a diesel/natural gas dual-fuel engine. The method is characterized in that that on the basis of maintaining an original engine control system, a diesel and gas control unit is added. Signals of all sensors of the original machine are shared by the dual-fuel control system and an electric control system of the original machine. The added dual-fuel control unit can control the injection of the diesel and an additionally-installed gas injection system (including a gas nozzle electromagnetic control, a gas switch valve control, gas liquid level or pressure monitoring and the like), and the added dual-fuel control unit can also process signals which are associated to the gas system. The injection volume and the oil injection moment of the diesel can be precisely controlled according to different working states of a diesel engine, and the injection time and the injection duration of the natural gas can also be controlled. The duel-fuel engine can be enabled to run safely and stably, the fuel consumption can be reduced, and the emission of tail gas can be reduced.

The invention provides a fuel cut-off valve which is suitable for aero-engine fuel systems and can delay for a longer time and cut off fuel in sequence. The fuel cut-off valve can control spring forceand the diameter of a flow nipple according to design requirements, thereby achieving functions of lingeringly cutting off reheat bypass, reheat intension and reheat starting oil supply. The fuel cut-off valve of a reheat fuel control unit of a turbofan engine consists of a valve 1, a valve lining 2, a nozzle tip 3, a spring 4 and a sealing rubber cup 5, wherein the valve 1 is arranged in the valve lining 2; the nozzle tip 3 is arranged in a through hole in the middle of the valve 1; the valve 1 is provided with a plurality of through slots; the valve lining 2 is arranged in a shell by interference fit; and the valve lining 2 is provided with oil through holes corresponding to the through slots on the valve 1. The fuel can be respectively led to a control cavity of a metering valve in each area through the oil through holes. The spring 4 is arranged on a spring cavity formed between the top of the valve and the shell, and the airtightness of the spring cavity is ensured by mounting the sealing rubber cup 5 on the valve 1.

The invention discloses a start fuel supply control method and system for a micro gas turbine, and is used for fuel supply control in the start process of the micro gas turbine. The micro gas turbine adopts a centrifugal atomization fuel nozzle, fuel is supplied to the centrifugal atomization fuel nozzle through a fuel control unit, atomized by the centrifugal atomization fuel nozzle, and ignited for combustion in a combustion chamber; the fuel supply requirements of the micro gas turbine in plain and plateau application scenarios can be met through adjusting the flow amount and/or a spray cone angle of the centrifugal atomization fuel nozzle. According to the method and system, under the condition of not changing technical parameters of the fuel supply control unit, the flow pressure characteristics of the fuel nozzle can be changed, the start fuel flow can be reduced, the gas-fuel ratio of ignition start can be increased, the fuel pressure in front of the nozzle can be increased, the atomization performance is enhanced, and the plateau ignition start performance is enhanced, and thus the fuel supply characteristic requirements of the micro gas turbine in high altitude application can be met and the operation field range of the micro gas turbine is widened.

The invention provides a power system of a dimethyl ether/hydrogen internal combustion engine and a control method for the power system of the dimethyl ether/hydrogen internal combustion engine, belonging to the fields of energy saving and the use of alternative fuels of the internal combustion engine. The power system comprises a dimethyl ether gas supply device and a hydrogen gas supply device, wherein dimethyl ether is reformed to produce hydrogen by the waste heat of the tail gas. The power system also comprises a dimethyl ether tank and a hydrogen tank, a tail gas waste heat reforming device, a blended fuel control unit and a dimethyl ether reformer controller, and input signals such as a crank angle signal, a cooling water temperature signal, a gas inlet temperature and pressure signal, and output signals such as a dimethyl ether jetting signal and a hydrogen jetting signal, an igniting module signal, an idle speed motor control signal, and a tail gas waste heat reforming device control signal. According to the invention, the discharging performance and the combustion performance of a spark ignition engine can be improved and increased due to dimethyl ether and hydrogen, and hydrogen is produced by reforming dimethyl ether, so that the use cost can be reduced, and the compensation of hydrogen can be realized. The device is simple in design structure, easy to install, and lower in cost, and the system is further good in adaptability and expansibility, wide in market prospect, and better in economic benefit.

An apparatus for controlling a gas turbine combustor having a diffusion combustion burner and a premix combustion burner comprising: a rotating speed detector for detecting a rotating speed of gas turbine, a recorder for recording the detected value of the rotating speed of gas turbine detected by the rotating speed detector, an arithmetic unit for calculating a change with time of the rotating speed of gas turbine in accordance with details of the detected value of the rotating speed of gas turbine recorded in the recorder, and a fuel control unit for judging a starting situation of reduction in the rotating speed of gas turbine on the basis of the change with time of the rotating speed of gas turbine calculated by the arithmetic unit and controlling respectively a fuel flow rate for the diffusion combustion burner to be fed to the diffusion combustion burner installed in the gas turbine combustor and a fuel flow rate for the premix combustion to be fed to the premix combustion burner.

A tractor is disclosed as a four-wheel drive vehicle with a movable seat back, with a seat height adjustment and with a varying load capability.

The present utility is related to an assembly structure of clustering fuel cell, comprising the fuel cell, electrical plug board and fuel control unit. The fuel cell has a PCB substrate, at least more than one membrane electrode assembly (MEA), fuel injecting inlet and electrically connecting part. The electrical plug board includes at least more than one electrical connector; each electrical connector is used to plug into the electrically connecting part of each fuel cell. The fuel control unit includes at least more than one fuel output outlet, wherein each fuel output outlet contacts with the fuel injecting inlet of each fuel cell.

The invention provides a fuel control system of a gas turbine. The fuel control system mainly comprises a load determining unit and a fuel control unit. The load determining unit is used for determining load information of the gas turbine, and the fuel control unit is used for receiving the determined load information and controlling fuel nozzles of the gas turbine to be opened or closed selectively according to the received load information, so that the sum of rated flow of the opened fuel nozzles is matched with the determined load information. Regardless of a high-load condition or a low-load condition, the flow of each opened fuel nozzle can be lower than the rated flow of the opened fuel nozzle all along during working, so that the combustion efficiency of each fuel nozzle can keep the highest, and a total combustion system keeps the highest combustion efficiency basically.

The invention belongs to the engine fuel technology and particularly relates to an engine mechanical hydraulic fuel flow auxiliary metering adjusting device. The engine mechanical hydraulic fuel flow auxiliary metering adjusting device comprises an air pressure sensor (1), a first metering valve (2), a second metering valve (3) and an auxiliary fuel way (6). According to the engine mechanical hydraulic fuel flow auxiliary metering adjusting device, an automatic auxiliary metering device sensing the air state of the outside atmosphere is added to assist in metering of fuel flow of a fuel regulator, and thus the fuel metering precision of the engine mechanical hydraulic type fuel regulator can be improved effectively. Meanwhile, two adjusting screws can both achieve metering adjustment, the high-altitude adaptability of a mechanical hydraulic type fuel control unit is improved, the minimum fuel quantity of engine fuel is ensured, and large practical application value is achieved.

A fuel system is disclosed which is adapted to improve engine ignition properties by ensuring that, when the engine ignition is turned off, residual fuel left over in the engine area after use is not returned to the fuel tank but instead remains in a common rail injector area. The fuel system for an excavator according to the present invention comprises: a fuel tank having a fuel supply line for discharging fuel and a return line for returning residual fuel after combustion in the engine area; a water-fraction separator which is provided downstream of the fuel tank, removes the water fraction contained in the fuel that is sucked in, and consists of a hand pump that is linked to the fuel supply line and of a first filter that is linked to the hand pump and filters out extraneous material in the fuel; an injection pump which is provided downstream of the water-fraction separator and which provides an injector with a high pressure supply of the fuel, from which the extraneous material has been filtered out on passing through the first filter and a second filter linked thereto, such that said fuel is sprayed into an engine combustion chamber; a fuel control unit which is respectively linked to the second filter and the injection pump and controls the injection pump so as to control the volume of fuel supplied to the injector; and a check valve which is provided in the return line and ensures that, when the equipment is made to stop working because the engine ignition is turned off, residual fuel left over in the engine area after use is not returned to the fuel tank along the return line but instead remains in the injector area.

A system and method for controlling gas turbine engines with maximum thrust of less than 500 kgf. The control system includes electronic control unit (“ECU”), sensors and actuators. To ensure the requirement of compactness, physical control system simplicity but maintain stability and accurate operation for the engine, the control system does not include components such as Fuel Control Unit (“FCU”), alternator and corresponding rectifier circuits. A sensor, instead of alternator's wave form signal, is used to detect the rotational speed of the engine. Voltage regulation into the electric motor driving the fuel pump controls fuel flow, instead of the FCU. The control method consists of upper and lower limits computation calculation blocks of the control signal, and PID control algorithm block with coefficients designed to be suitable for the engine operating ranges. Control is implemented through a 7-step calculation process. Piecewise linearization modeling and tuning PID coefficients is also presented.

The invention relates to the industrial control field, in particular to a hybrid power supply control system. The invention provides a hybrid power supply control system with high energy/weight ratio. The invention is characterized in that the output end of H2 is respectively connected with the input ends of a fuel cell control unit and an air inlet valve, the output end of the air inlet valve is connected with the input end of the fuel cell, the output end of the fuel cell is respectively connected with the input end of a DC/DC converter and the input end of the fuel control unit, the output end of the DC/DC converter is respectively connected with the input ends of a lead-acid cell and an DC/AC, the output end of the lead-acid cell is respectively connected with the input ends of the DC/AC and the fuel cell control unit, the output end of the DC/AC is connected with the input end of an AC dynamo, the output end of the fuel cell control unit is respectively connected with the input ends of a color LCD, a fan, an FC and the air inlet valve, and the output end of the fan is connected with the other input end of the fuel cell.

The invention discloses an intelligent office garbage recycling bin. The intelligent office garbage recycling bin comprises a bin body and a bin cover; the bin body is connected with the bin cover through a hinge; an automatic uncovering mechanism is arranged between the bin body and the bin cover; a driving wheel and steering wheels are arranged at the bottom of the bin body; a power supply, a controller, a driving motor and a steering motor are arranged on the bin body; the controller comprises a control unit, a motor driving unit, a position identification unit, an obstacle avoidance unit and a wireless communication unit; a personnel client can be in wireless connection with the controller through the wireless communication unit; the motor driving unit is connected with the control unit; the obstacle avoidance unit is connected with the control unit; the obstacle avoidance unit identifies the position of an obstacle by adopting a diffuse reflection type photoelectric identificationswitch and feeds the position into the control unit; and the control unit controls the motors to avoid the obstacle. The intelligent office garbage recycling bin can avoid the obstacle automaticallyin a movement process; the intelligence degree is high; and the intelligent office garbage recycling bin is suitable to be used in a plurality of indoor places, such as an office and a meeting room.

A fuel system for an internal combustion engine includes a fuel injector, and a fueling control unit electrically connected to a solenoid in the fuel injector. The fueling control unit energizes the solenoid with a lift current pulse to lift an armature, then energizes the solenoid with a separate capture current pulse to capture the armature at a lifted position. The solenoid is deenergized a dwell time while the armature is in flight toward the lifted position. Armature lifting speed is retarded based on the deenergizing of the solenoid so as to limit bouncing of a valve pin in the fuel injector against a stop. The techniques assist in linearizing a fuel delivery curve.

Operating an engine includes injecting a liquid alcohol fuel such as methanol into a stream of compressed intake air at an upstream injection location, and injecting the liquid fuel at a plurality of downstream injection locations into a plurality of streams of the compressed intake air from an intake manifold to combustion cylinders in the engine. A fueling control unit apportions a total injected quantity of the liquid fuel between the upstream injection location and the plurality of downstream injection locations based on a temperature parameter of the compressed intake air. The compressed intake air is combusted with the liquid fuel and a compression ignition pilot fuel in the plurality of combustion cylinders.