30 results about "Diesel spray" patented technology

The invention relates to a method and a device for controlling blending gas of an electric-control diesel engine. The invention can judge the running state of the engine according to rotation speed signals, throttle pedal signals, original diesel spraying pulse width signals and the like, and reasonably set the blending ratio to enable the diesel and gas ratio to achieve the optimum proportion state, therefore the diesel consumption rate and waste gas exhaust are reduced on the premise of ensuring the dynamic property of the engine. The method for controlling blending gas of an electric-control diesel engine comprises a quick and moderate control method for diesel and gas switching, a real-time accurate control method for gas amount and diesel amount, a self-learning control method for bad working conditions and a fault diagnosis function with fault diagnosis and alarming. The device for controlling blending gas of an electric-control diesel engine comprises a signal acquisition module, a diesel spraying amount acquisition and control module, a natural gas supply control module, a microcontroller, a CAN communication module and a serial communication module.

The invention discloses a dual-fuel engine combustion system and method based on a switchable type oil sprayer. The dual-fuel engine combustion system is characterized in that an electronic control common-rail diesel supply device, a premix natural gas supply device and the switchable type oil sprayer are connected with an electronic control system ECU, and the switchable type oil sprayer is installed on a dual-fuel engine and further connected with the electronic control common-rail diesel supply device. The dual-fuel engine combustion system and method have the advantages that the mixed gas flow, the mixed gas concentration, the diesel supply pressure and spraying timing of two spraying nozzles are controlled through an electronic control system, the sprayer covers the whole substitution rate range of the dual-fuel engine, the diesel spraying atomization quality of the dual-fuel engine is improved, and the overall performance of the dual-fuel engine is optimized.

The invention relates to a compression ignition type diesel engine system capable of being powered by mixed DME (dimethyl ether) gas and a control method. On the basis that a total body and a control system of an original engine are kept, the diesel engine system is additionally provided with a mixed fuel electronic control unit, a DME storage tank, a DME pipeline pressure sensor, a DME pipeline electromagnetic valve and a DME spray nozzle. The DME fuel electronic control unit can respectively control start and stop of a diesel spray nozzle and start and stop of the DME spray nozzle by means of receiving an original engine sensor signal and a DME gas pipeline pressure signal. The DME electronic control unit judges working conditions of the engine according to obtained rotation speed and pedal plate position signals when the DME electronic control unit is communicated with an electronic control unit of the original engine, then the DME electronic control unit transmits signals so as to respectively control a jetting time interval and a pulse width of the diesel spray nozzle of the original engine and a jetting time interval and a pulse width of the DME spray nozzle, and the compression ignition type diesel engine system realizes combustion modes including that pure DME cold start is carried out, diesel is mixed with DME under small load, pure diesel start is carried out under large load. Accordingly, HC, CO and particle emission in a cold start process of the diesel engine is greatly reduced, and thermal efficiency and emission level of the engine under a steady work condition are improved.

The invention discloses an auxiliary oil-saving environmental protection device of a diesel internal combustion engine. The auxiliary oil-saving environmental protection device of the diesel internal combustion engine is communicated with a cylinder of the diesel internal combustion engine through a pipeline. Hydrogen and oxygen mixed gas is led into the cylinder and is mixed with diesel spray for combustion. The auxiliary oil-saving environmental protection device comprises a circulating gas supply device, a separating and filtering device and a circuit control system. The circulating gas supply device comprises a hydrogen an oxygen generator. A gas inlet of the separating and filtering device and a gas outlet of the hydrogen and oxygen generator are communicated through a first pipeline. A gas outlet of the separating and filtering device is communicated with a gas supply pipeline of the diesel internal combustion engine. Electrolytic gas is led in through the gas supply pipeline of the diesel internal combustion engine. The separating and filtering device is communicated with the hydrogen and oxygen generator through a second pipeline so that an electrolyte solution of the hydrogen and oxygen generator can be recycled. The circuit control system is electrically connected with the hydrogen and oxygen generator and the separating and filtering device. The auxiliary oil-saving environmental protection device can promote sufficient combustion of diesel oil in the diesel internal combustion engine, increase the combustion rate and the utilization rate of the diesel and effectively reduce the content of pollutants in exhausted tail gas, and therefore the comprehensive benefits of saving energy, reducing emission and protect the environment are achieved.

The invention discloses a method for automatically identifying a diesel spray crushing process and automatically realizing the spray continuous calculation. The method automatically judges the processthat a liquid film is crushed into liquid drops in the diesel injection process, and realizes a SD-ELSA algorithm of the spray continuous calculation. The SD-ELSA algorithm is characterized in that the sphericity degree and the average particle diameter of liquid phases in grids are calculated and taken as judgment bases, the information of particles in a flow field are calculated through a Lagrangian method, the information of the grids belonging to continuous liquid phases in the grid node information in the full-flow field is calculated by using an Euler model, and Euler block masses meeting two bases for determination are converted into particles and re-calculated through the Lagrangian method. According to the method, dynamic converting coupling of the Euler-Lagrangian model is realized, the complete information of discrete phases and continuous phases in the flow field can be automatically obtained and subjected to iterative computation, three stages of a liquid column, primarycrushing and secondary crushing of the diesel injection are obtained, and the diesel spray process is completely represented.

The invention aims to provide a diesel spray penetration distance prediction method with a variable fuel injection rate. The method is suitable for predicting the diesel spray penetration distance with the variable fuel injection rate, and belongs to an iconography modeling method. The method mainly comprises the following steps: based on the jet flow mechanics theory, an analytic expression of the change of the effective injection speed along with the injection speed is established, the effective injection speed replaces the injection speed and is introduced into a spray model suitable for constant oil injection rate calculation, and the spray model suitable for the variable oil injection rate is obtained and is used for prediction of the penetration distance. The established spray modelhas a reliable theoretical basis, the modeling method has high attribute description capability, the model is simple, parameterized research is easy, and the spray penetration distance of the variableoil injection rate can be predicted.

The invention relates to a burner, in particular to a short-flame and large-diameter diesel burner. The short-flame and large-diameter diesel burner comprises a burner shell, an ignition rod and a diesel sprayer, wherein the ignition rod and the diesel sprayer are arranged in the burner shell. The burner shell is a spiral volute, an air inlet is formed in one side of an outer ring of the volute, an air outlet is formed in an inner ring of the volute, the direction of the air inlet is coincident with the tangent direction of the volute, the position of a diesel spraying nozzle of the diesel sprayer corresponds to the position of the air outlet of the volute, and the ignition position of the ignition rod is located above the diesel spraying nozzle and the air outlet. According to the short-flame and large-diameter diesel burner, the burner shell is designed into the volute, air enters the burner in the tangent direction of the volute, the air and diesel are mixed and burnt through centrifugal force, the structure is simple and attractive, the air and the atomized diesel can be more sufficiently mixed, losses of the atomized diesel can be reduced, the diameter of a hearth can be reduced, the size of a boiler can be reduced, and the burning cost can be reduced.

The invention provides a diesel/natural gas double fuel direct injection device including a constant volume bomb, a sparking plug, a natural gas pipe, a fuel pipe union, a constant volume bomb adapter, a natural gas ejector, a diesel ejector and a diesel ejector supporting frame. The constant volume bomb adapter is installed on the top of the constant volume bomb. The natural gas pipe is installedon the constant volume bomb adapter. The lower end of the natural gas pipe is connected with the top end of the natural gas ejector in a threaded mode. The upper end of the diesel ejector supportingframe is connected with the bottom of the constant volume bomb adapter and the lower end of the diesel ejector supporting frame is connected with the lower end of the diesel ejector in a detachable mode. A top electrode of the sparking plug is connected with an ECU output circuit and a bottom electrode of the sparking plug is connected with power connections of the diesel ejector and the natural gas ejector separately. The position of the diesel ejector can be flexibly adjusted and the distance between a diesel spraying hole and a natural gas spraying hole can be as small as 3mm. The interaction of double fuels is researched more advantageously. The diesel/natural gas double fuel direct injection device realizes the mixing of direct injection of the double fuels and provides research datafor the exploration of a direct injection engine for a diesel ignited natural gas cylinder.

The invention discloses a scraper conveyer belt type heat preservation semi-trailer carrier vehicle. The carrier vehicle comprises a semi-trailer chassis and a stock bin. An engine and a hydraulic system are installed on a front portion of the semi-trailer chassis, and the engine is connected with the hydraulic system; the stock bin is installed on the semi-trailer chassis and has a heat preservation function; and a stock bin cover is installed on an upper portion of the stock bin, a rear cover door is installed on a rear portion of the stock bin, a diesel spraying device is installed on an inner wall of the stock bin, a scraper conveying chain is arranged at a bottom of the stock bin, the scraper conveying chain is installed in the middle of the semi-trailer chassis, and a driving motor is installed on the scraper conveying chain. The engine drives the hydraulic system to drive the scraper conveying chain to work through the driving motor. According to the scraper conveyer belt type heat preservation semi-trailer carrier vehicle, a design of a scraper conveying structure and a heat preservation stock bin is adopted, when the scraper conveyer belt type heat preservation semi-trailer carrier vehicle is matched with a paver for construction, the stock bin does not need to be lifted, and construction safety is improved. A maximum allowable loading capacity of the semitrailer carrier vehicle is 40000kg, a single-time transport capacity is improved, and transport cost is reduced.

The invention relates to the technical field of the preparation of flexible graphite and relates to a method for preparing flexible graphite granules. In the method, expandable graphite is adopted. And the method comprises the following four steps of: a, expanding the graphite, namely adding the expandable graphite and diesel spray into an expanding furnace to perform expansion; b, performing vermiform forming, namely forming a vermiform forming opening at an outlet of the expanding furnace, and extruding the expanded graphite at the vermiform forming opening to form a vermiform shape; c, performing exhaust extrusion by a tapered screw type feeder; and d, pelletizing through bundling under high pressure, namely performing extrusion bundling on the expanded vermiform graphite through a funneled bundling device, allowing the bundled graphite to form a stick of which the sectional area perimeter phi is between 1.5 and 3 millimeters through a hydraulic forming pair roller, and cutting the stick and pelletizing to form 5 to 36-mesh granules. By the method, the problem of single purpose caused by the preparation method of the original expandable graphite is solved, and the problem that expandable graphite paper is easy to drop and crack in finished products of brake sheets due to the utilization of the original expandable paper and the problem that the original expandable paper is so thin that other rigid materials penetrate to coupling surface and cause noise in the braking process are solved.

The invention mainly relates to the technical field of diesel engines, in particular to a side wall circulation combustion chamber for a diesel engine. The side wall circulation combustion chamber for the diesel engine is a concave deep pit which is formed in the top of a piston. The concave deep pit is symmetric about the central axis of the piston. The concave deep pit comprises an annular part and a columnar part. The shape of the longitudinal section of the annular part is a semicircle which is symmetric about the central axis of the piston. The circle center of the semicircle is positioned on the side edge of the longitudinal section of the concave deep pit. The upper portion of the semicircle is tangent to a straight line formed by the longitudinal section of the end face on the top of the piston. The columnar part is cylinder-shaped. The side edge of the longitudinal section of the columnar part is connected with the lower portion of the semicircle. The side edge of the longitudinal section of the columnar part and the circle center of the semicircle of the longitudinal section of the annular part are in the same vertical straight line. According to the side wall circulation combustion chamber for the diesel engine, the structure is simple and compact, the layout is reasonable, when diesel is injected into the side wall circulation combustion chamber, diesel sprays are injected to the arc surface of the side wall of the side wall circulation combustion chamber, then the rebound is generated, and circulation is generated in the side wall circulation combustion chamber, so that mixing of the diesel and air is more even, and the efficient combustion of the diesel is facilitated.

The invention relates to a spray type diesel coking test simulation device and a diesel detergency detection method. In a coking simulation test, an oil supply device supplies diesel to a diesel spraynozzle; the diesel is sprayed from the diesel spray nozzle to a diesel channel simulation pipe; a heating structure heats the diesel channel simulation pipe, so that an inner cavity of the diesel channel simulation pipe remains at a relatively high temperature; the diesel cokes in the diesel channel simulation pipe and is attached to an inner wall of the diesel channel simulation pipe under the temperature condition. The diesel channel simulation pipe is used for coking the diesel to increase a diesel coking area, so as to improve coking efficiency, obviously shortening detection test time and solve a problem of long time consumption of detection test of diesel detergency in the prior art.

The invention provides a self-rectification type diesel engine air inlet flame warmer. The self-rectification type diesel engine air inlet flame warmer comprises a warmer base, a warmer outer barrel, a warmer inner barrel, an electric heating plug, a fuel nozzle and related components; the warmer outer barrel is used for guiding air flow in the air inlet pipe into the warmer; the warmer inner barrel and the warmer outer barrel are eccentrically arranged; the warmer inner barrel and the warmer outer barrel jointly organize the air flow to form an internal stable wind field; after the glow plug is powered on, the glow head of the glow plug is used for igniting diesel oil spray sprayed by the fuel oil nozzle; and high-temperature fuel gas generated by combustion is mixed with inlet gas, and then the inlet gas of the diesel engine is heated. The self-rectification type diesel engine air inlet flame warmer has the beneficial effects that in the starting process of a diesel engine, reliable ignition is achieved by spraying fuel oil to the glow plug incandescent head; a stable wind field is formed by organizing gas flow in the gas inlet pipe through the structure body; stable combustion in the combustor is guaranteed; and the working reliability and stability of the gas inlet flame heater can be improved.

The invention discloses a diesel oil spray combustion simulation method based on multi-component decoupling physical and chemical substitutes. The method is used for simulating spray combustion characteristics of -50 # diesel oil in alpine regions. The method comprises the following steps: selecting a physical substitute to characterize the physical characteristics of the -50 # diesel oil, and selecting a chemical substitute to characterize the chemical characteristics of the -50 # diesel oil; when diesel oil is in a liquid state during diesel oil spray combustion simulation, selecting the physical substitute as a diesel oil substitute; and when the diesel oil is evaporated from a liquid state to a gaseous state, selecting the chemical substitute as a diesel oil substitute to replace the physical substitute. According to the invention, spraying and combustion characteristics of actual diesel oil can be well reproduced at the same time.

The invention discloses a combustion-supporting injection device and method for an internal combustion engine and the internal combustion engine. The device comprises a main body, a controller, a drainage device, a diesel channel, an internal storage cavity, a limiting sleeve, natural gas channels, natural gas spray holes, natural gas assisted diesel spray holes and diesel internal circulation holes, wherein a center line of the diesel channel coincides with a center line of the main body; the internal storage cavity surrounds the diesel channel; the drainage device is mounted in the middle ofthe diesel channel; the natural gas channels comprise a first natural gas channel and a second natural gas channel; the lower end of the first natural gas channel communicates with the internal storage cavity; the diesel internal circulation holes communicate with the diesel channel and the internal storage cavity; the natural gas assisted diesel spray holes are located on one side of the lower end of the main body and communicate with the internal storage cavity; and the natural gas spray holes are located at the tail end of the second natural gas channel and communicate with the second natural gas channel, and the downward inclined angle of the natural gas spray holes is not equal to that of the natural gas assisted diesel spray holes.