62results about How to "Good air-fuel ratio" patented technology

The invention relates to a controlling method of fuel-air mixture electronic control unit (ECU) of engine. In the controlling method, through acquisition of air inlet temperature and pressure, water temperature, engine rotational speed, throttle position and oxygen sensor signal, the ECU accurately controls the oil (gas) spraying quantity and ignition angle; the oil (gas) spraying adopts multipoint grouping or multipoint sequential technique, and the ECU calculates the actual oil (gas) spraying quantity and actual oil (gas) spraying time with one same algorithm and two sets of rating data in the same hardware platform; the ECU performs closed-loop control to air fuel ratio; the oil (gas) spraying is controlled based on the torque of an electronic air throttle, and ECU acquires the air throttle pedal position signal and calculates the maximal torque at that time to control the opening extent of the air throttle. The controlling method can remarkably improve the performance of engine, obtain the optimal air fuel ratio under various operating conditions, and make the automobile to achieve the optimal dynamic force.

The invention discloses an optimal control system for a steel rolling heating furnace, relating to the technical field of steel rolling of a heating furnace. Firstly, an on-line furnace temperature setting device is established according to different billet types, production rhythm, billet initial temperature and billet tapping temperature; the billet tapping temperature is controlled by controlling the temperature of the furnace; based on heat efficiency models under various working conditions, the loading variation of the heating furnace is calculated and taken as a feedforward value of the furnace temperature, and the high-accuracy control on the temperature of the heating furnace under loading fluctuation is realized; and on the basis, an optimal air-fuel ratio is found by establishment of an air-fuel ratio optimal control model, so that the heating furnace achieves an optimal burning condition and the aims of saving fuel and lowering steel loss are achieved.

The invention discloses an automatic control method for the air-fuel ratio of a hot-blast stove. The method includes the following steps that S1, in the ignition stage, after a control system of the hot-blast stove receives a combustion signal, air and fuel gas are input into the hot-blast stove according to the optimal air-fuel ratio; S2, after a signal indicating that ignition of the hot-blast stove is completed is received, an air-fuel ratio dual-PID controller is started, dual PID includes remaining oxygen PID and arch crown temperature PID, and maximum values of the two PID control results are output; and S3, after a banking signal of the hot-blast stove is received, the control system of the hot-blast stove stops working. By means of the automatic control method for the air-fuel ratio of the hot-blast stove, the optimal air-fuel ratio can be output all the time, and it is guaranteed that coal gas is efficiently and fully combusted; the arch crown temperature is controlled to be stabilized at the a target arch crown temperature, and it is guaranteed that the combustion process is safe and stable; and automatic and stable switch for different requirements of the air-fuel ratio in various stages can be achieved.

The invention discloses a vehicle wide area oxygen sensor lose-efficacy monitoring method. According to the vehicle wide area oxygen sensor lose-efficacy monitoring method, wide area oxygen sensor lose-efficacy monitoring comprises response delay monitoring from thick to thin and response delay monitoring from thin to thick in an air exhaust system, and the monitoring processes both comprise a lose-efficacy initialization stage, a waiting stage, an offset time calculation stage, a response delay time calculation stage, a final response time calculation stage and a lose-efficacy monitoring evaluating stage. By means of the vehicle wide area oxygen sensor lose-efficacy monitoring method, the vehicle wide area oxygen sensor lose-efficacy monitoring can be rapidly and accurately realized.

The invention discloses an oil film compensation method used in fuel oil injection. The method comprises the following steps: collecting air inflow signal and crankshaft rotating speed signal; confirming basic injecting time (TIB) of an engine according to the crankshaft rotating speed signal and the air inflow signal; judging that the engine is in sharp accelerating state or sharp decelerating state according to the TIB; inquiring a marking data table of the engine to obtain fast compensation amount and slow compensation amount of an intake manifold of the engine according to the state of the engine; and acquiring the oil film compensation value in the engine oil injection process according to the fast compensation amount and slow compensation amount of the intake manifold of the engine. The method can accurately compensate the oil injection amount by precisely calculating the oil film compensation value in fuel oil injection, thus greatly improving the power output performance in acceleration and deceleration, obtaining the optimal air-fuel ratio of an automobile in accelerating or decelerating working condition, and adjusting the running performance of the automobile by changing oil injection sum.

The invention discloses a high-temperature air and high-temperature low-oxygen smoke mixed combustion-supporting type full-automatic control ceramic kiln which comprises a combustion-supporting gas main pipe, a fuel gas main pipe and a kiln body. The kiln body is divided into a cooling section, a combustion section and a preheating section in the longitudinal direction. The combustion section comprises at least three control subareas, and each control subarea comprises a thermocouple, at least five nozzles and a control box. Each control box is provided with a box body, a first mixer contained in the box body, a combustion-supporting gas control branch pipe penetrating one side wall of the box body to be connected between the first mixer and the combustion-supporting gas main pipe, a fuel gas control branch pipe penetrating the other side wall of the box body to be connected between the first mixer and the fuel gas main pipe, and a mixed gas branch pipe penetrating one end wall of the box body from the first mixer to extend to the outside of the box body. First electric valves, first thermometers and first flowmeters are arranged on the combustion-supporting gas control branch pipes. Second electric valves and second flowmeters are arranged on the fuel gas control branch pipes. Each mixed gas branch pipe is connected with the at least five nozzles in the corresponding subarea.

The invention relates to a sequential fuel gas injection system with an on-board diagnostics (OBD) system for an automobile. The sequential fuel gas injection system comprises a fuel gas supply system, wherein in the fuel gas supply system, a gas storage steel cylinder is connected with a high-pressure electromagnetic valve; a pressure sensor is arranged on the high-pressure electromagnetic valve; the high-pressure electromagnetic valve is connected to a manual cutoff valve through a steel pipe, and is connected to a pressure reducer through a steel pipe; the pressure reducer is connected with one end of a gas filter through a rubber hose; the other end of the gas filter is connected with a gas injection valve through a rubber hose; a nozzle of the gas injection valve is connected with a corresponding engine cylinder through a rubber hose; the gas storage steel cylinder is provided with a steel bottle angle valve; a gas outlet pipe of the gas storage steel cylinder is provided with a gas charging valve; and an electric control system consists of a water temperature sensor which is arranged on the pressure reducer, a gas temperature sensor which is arranged on the gas injection valve, a change-over switch, a buzzer, a manifold pressure sensor, a fuel gas pressure sensor, an oxygen sensor, an engine rotating speed sensor, an OBD adapter and a fuel gas electronic control unit (ECU). In the fuel gas multi-point sequential injection control system with OBD function, optimal air-fuel ratio of the engine and optimal traveling performance of the automobile are ensured under various working conditions, and economical efficiency is improved by over 10 percent compared with the conventional fuel gas system for the automobile.

The invention provides an annealing furnace air-fuel ratio self-optimizing method and device. The method comprises the following steps that initial air-fuel ratio and step size are obtained; the difference value between the actual furnace temperature and the set furnace temperature is obtained; whether optimizing is performed continuously or not is judged according to the difference value betweenthe actual furnace temperature and the set furnace temperature; when the difference between the actual furnace temperature and the set furnace temperature is less than or equal to 20 DEG C, first optimizing information is sent; according to the first optimizing information, an in-furnace fuel gas change value is obtained through a fuel gas flow changing device; and the in-furnace fuel gas change value is judged, when the in-furnace fuel gas change quantity is smaller than a set value for three times continuously, optimizing is completed. The technical problems that in the prior art, due to thefact that the control of the air-fuel ratio is not good in annealing furnace combustion control, heat loss, unstable system combustion and the like exist are solved; and the technical effects that the proper air-fuel ratio can still be kept under the working condition that thermal load changes, then the combustion condition is optimized, the optimal combustion control is achieved, the product quality is ensured, the heating quality is improved, the fuel gas consumption is reduced, and the economic benefits are obvious are achieved.

The invention discloses a piston reciprocating-type single-cylinder high-speed internal combustion engine which adopting a gear and rack mechanism of a third embodiment of the invention patent ZL200710147446.7 (the Publication No: CN101144524B) in China as an actuating mechanism. The piston reciprocating-type single-cylinder high-speed internal combustion engine consists of a power mechanism and inventions made in invention patents ZL200710193938.X (the Publication No:CN101289956B), ZL200710193940.7 (the Publication No: 101205861B), ZL200810169739.X (the Publication No: 101434419B) and ZL201112083190.9 (the Publication No: CN102562339B), and the patent applications 200710193939.4, 20131043603.X, 201410020453.0 and 201410208643.5. The piston reciprocating-type single-cylinder high-speed internal combustion engine is capable of completely eliminating the defects and the shortcomings of an existing conventional internal combustion engine, has the thermal efficiency reaching about 70% and the specific weight relatively reduced by about 30 times, and has an active effect of basically eliminating various inefficiently combusted pollutants to the atmosphere.

The invention discloses an excess air coefficient management system for a kiln. The excess air coefficient management system comprises a burner arranged in the kiln, a thermocouple, a temperature control instrument, a fuel gas actuator, a fuel gas proportional valve, an air actuator and an industrial personal computer. The fuel gas actuator and the fuel gas proportional valve are connected to a fuel gas pipeline of the burner in series one after another. The air actuator is connected to an air pipeline of the burner in series. An air pressure detection device of the fuel gas proportional valveis connected with the air pipeline of the burner. The thermocouple, the industrial personal computer, the fuel gas actuator and the air actuator are connected with the temperature control instrument.According to the baking technology of green bricks, burner sets have different optimal air-fuel ratios during the different firing stages. Meanwhile, when the kiln is not in operation, the burner isin a low fire state, combustion-supporting wind can achieve automatic adjustment and the optimal ratio of fuel gas. The whole process is completely controlled by the program edited in advance, precisecontrol over excess air coefficients is achieved, the stability of temperature of the hearth is ensured, the firing efficiency is improved, and energy consumption is reduced.

The invention provides a diesel oil/liquefied petroleum gas co-firing system. The diesel oil/liquefied petroleum gas co-firing system comprises a diesel oil engine, a diesel oil delivery pipeline and a liquefied petroleum gas delivery pipeline, wherein the diesel oil engine is connected with a gas intake manifold, diesel oil of a diesel oil tank is delivered to the diesel oil engine through the diesel oil delivery pipeline, and the liquefied petroleum gas delivery pipeline is connected with a liquefied petroleum gas storage barrel. The liquefied petroleum gas in the gas storage barrel is delivered to the corresponding positions of the gas intake manifold through two air compression type flow control valves, and the optimum gas injection is obtained, so that the diesel oil/liquefied petroleum gas can be co-fired excellently, and energy conservation and carbon emission reduction are realized.

The invention discloses an engineering vehicle door hinge and a manufacturing process thereof. The hinge has the advantages of being reliable in structural strength and good in abrasion resistance. According to the main points of the technical scheme, the hinge comprises a first hinge piece, a second hinge piece and a rotating shaft, wherein first movable sleeves are arranged on one side of the first hinge piece, second movable sleeves are arranged on one side of the second hinge piece, the first movable sleeves and the second movable sleeves are all arranged on the rotating shaft and rotationally connected, an oil hole is formed in one end of the rotating shaft, an oil nozzle communicating with the oil hole is formed in the rotating shaft, a plurality of strip-shaped oil grooves are formed in the peripheral wall of the rotating shaft, the oil grooves are annularly distributed at equal intervals, oil guide holes communicating with the oil hole are formed in the bottoms of the oil grooves, sealing sleeves and steel rings are arranged in the oil grooves, the steel rings are arranged on the inner sides of the sealing sleeves, and the sealing sleeves are fixed in the oil grooves through the steel rings. The hinge and the method are suitable for the technical field of hinges.

The invention discloses an automobile exhaust treatment device, and belongs to the technical field of environmental protection equipment. According to the technical scheme, the automobile exhaust treatment device is characterized by comprising a shell internally provided with a heat preservation interlayer and a catalyst carrier arranged in the shell, wherein the catalyst carrier is divided into aplurality of blocks by circulation gaps, and a fixing sleeve communicating with the circulation gaps is assembled at the axis of the catalyst carrier. A control sleeve directly conveys exhaust to themiddle and lower reaches of a catalyst through commnuicating holes, the distance of part of the exhaust penetrating through the catalyst gaps is shortened, and the exhaust resistance is reduced; meanwhile, the amount of harmful pollutants making contact with catalysts at different positions is relatively uniform, and the conversion strength is relatively consistent; when the temperature is too high, an ECU controls a telescopic piece to contract, thus part of the exhaust is directly exhausted through an exhaust opening, the strength of the oxidation reaction in the catalyst is reduced, and the temperature in the catalyst is controlled; and when the blocking pressure in a three-way catalyst is too large, the control sleeve moves, part of the exhaust is directly exhausted, and the pressureof the exhaust end of an engine is reduced.

In order to solve the problem that engine power of a carburetor in the high altitude area is affected, the invention provides a high-altitude-area carburetor device. The high-altitude-area carburetordevice comprises a carburetor body, the carburetor body comprises a float chamber and a float chamber cover, a main jet is arranged in the float chamber, a protrusion is arranged on the inner side ofthe float chamber cover, a channel is arranged in the protrusion, an electromagnetic valve is arranged on the outer side of the float chamber cover, and is connected with a first needle valve, an oilinlet is formed in the side wall of the channel, an opening is formed in the float chamber cover, a fuel oil adjusting device is further included, and comprises a needle valve part, the needle valve part comprises a second needle valve, the second needle valve is matched with the oil inlet, and a valve cover is arranged at the tail end of the second needle valve. Through the electromagnetic valve,the main oil inlet amount of the main jet can be rapidly controlled, the opposite position of the second needle valve and the oil inlet can be adjusted, the oil inlet amount of the main jet can be controlled, the valve cover is arranged at the tail end of the second needle valve, according to the air thinning degree, the positions of the second needle valve and the oil inlet can be precisely adjusted, and the air-fuel ratio of an engine is optimal.

The invention discloses a controllable flame stabilizer, an engine and an aircraft. The controllable flame stabilizer is installed in an engine combustion chamber and comprises a shell, an electric control fuel gas generator and a spray pipe are arranged in the shell, and the electric control fuel gas generator comprises a fuel-rich electric control solid propellant combustion chamber and an oxygen-rich electric control solid propellant combustion chamber; one end of the fuel-rich electronic control solid propellant combustion chamber and one end of the oxygen-rich electronic control solid propellant combustion chamber are respectively a fuel-rich storage cavity used for containing a fuel-rich electronic control solid propellant and an oxygen-rich electronic control solid propellant storage cavity used for containing an oxygen-rich electronic control solid propellant; and independently-controlled electric ignition mechanisms are respectively arranged in the fuel-rich electric control solid propellant combustion chamber and the oxygen-rich electric control solid propellant combustion chamber. The fuel-rich propellant and the oxygen-rich propellant can be ignited and combusted separately or simultaneously according to the flight working condition and the maneuvering requirement of the engine, so that the air-fuel ratio is kept in a better state, and the stable combustion boundary and the engine performance are improved.

The invention discloses a premixing device and gas equipment. The premixing device comprises a body which defines a gas flow channel with an air inlet and a gas nozzle; an air volume adjusting plate arranged in the air flow channel, and a plurality of normally-closed air openings and normally-open air openings which are opposite to the air inlet are formed in the air volume adjusting plate; an impeller assembly including a rotating shaft penetrating through the air volume adjusting plate and a plurality of impellers arranged on the rotating shaft, and at least one impeller is always at least partially overlapped with the projection of the normally-open air openings in the direction perpendicular to a paper surface, so that the impeller assembly is driven to rotate by virtue of air pressure; and a valve plate. According to the premixing device disclosed by the embodiment of the invention, the air volume adjusting plate with the normally-closed air openings and the normally-open air openings is arranged in the air flow channel, and the impeller assembly is driven by the air pressure to rotate so as to drive the valve plate to rotate synchronously, so that the opening degree of the normally-closed air openings is changed through the valve plate, the air inflow participating in mixing is adjusted, and a better air-fuel ratio is obtained.