115results about How to "Large injection volume" patented technology

The disclosure provides a control device of a spark-ignition gasoline engine. According to the invention, in a spark-ignition gasoline engine (1) with a higher high compression ratio, abnormal burning in a high load area can be avoided. When an operating state of an engine body is within a low engine speed range, a controller (PCM 10) operates a fuel pressure variable mechanism (a high pressure fuel supply system 62) so that a fuel pressure is higher within a high engine load range compared to a low engine load range, the controller operates, within the high engine load range, a fuel injection mechanism to perform at least a fuel injection into the cylinder by a cylinder internal injection valve (a straight spray injector 67) at a timing during a retard period from a late stage of a compression stroke to an early stage of an expansion stroke, and the controller (10) operates, within the high engine load range, an ignition plug to ignite at a timing during the retard period and after the fuel injection.

The present invention provides a method for forming sprayed film and a device thereof, which can restrain the operating time and the increase of material used for spraying, and furthermore the film thickness of the axial end of the round hole is equal with that of other part. The device for forming sprayed film causes that a spraying film (7) is formed on the inner surface (3a) of the cylinder at a state that a spraying gun (5) rotates and axially moves simultaneously in the cylinder (3). Simultaneously a sucking device (49) is used for sucking the air in the cylinder (3) for leading to the air flowing in the cylinder (3) for preventing the entering of foreign object into the spraying film (7). A tendency that the air velocity in the cylinder (3) is larger than the velocity of a preset area A at the axial end of the suction side exists. Under the influence of factors of higher velocity, cylinder shape, etc., the supplying velocity of metal wire (11) which is used as spraying material at the preset area A in which the thickness of spraying film (7) easily becomes thin to the spraying gun (5) is higher than the supplying velocity of other component. Thereby, the film thickness of the spraying film (7) at the preset area A can be increased and the whole film thickness can be homogenized.

The invention discloses a gasoline premixing and diesel igniting engine as well as control method thereof. The gasoline premixing and diesel igniting engine includes a diesel engine and a main control unit for controlling the action of the engine, wherein a control signal output end of the main control unit is connected with the diesel engine, at least one gasoline injector is arranged on an air inlet pipeline of the diesel engine, and the gasoline injectors are connected with a gasoline electronic pump through a gasoline common rail; the control method is as follows: the main control unit receives information acquired by an information acquisition unit; and further, the main control unit judges the working condition of the engine as per various received information, and selects corresponding ignition mode to start the engine. The gasoline premixing and diesel igniting engine has simple structure and low cost, only requires arrangement of multiple gasoline injectors on the air inlet pipeline of the existing diesel engine, and meanwhile, can efficiently lower the oil consumption and reduce emission of harmful substances. The gasoline premixing and diesel igniting engine is applicable to engines used in fields of automobiles, locomotives, steamships, farm machinery, engineering machinery and the like.

The invention designs a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method, aims at solving the problem that effective adjustment cannot be carried out on an intake flow and an airflow direction in an air channel, of an internal combustion engine adopting the traditional intake structure, and in particular, an internal combustion engine adopting a four-valve structure, and solving the problems of instable combustion, difficult ignition, fire and the like generated during lean combustion, and develops a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method. The invention provides a variable intake system. According to the variable intake system, the optimal airflow movement under different working conditions is obtained through control for the opening and closing of a swirl control valve, and in combination with a piston top surface with a special shape. The invention discloses a combined internal combustion engine technology for carrying out in-cylinder direct injection and intake channel injection respectively on the basis of two fuels. The different combustion modes of an in-cylinder mixed gas are realized through control for an injection time and an injection pulse width, and in combination with an airflow movement, and then the working efficiency of the internal combustion engine under different working conditions is improved, and oil consumption and emission are reduced.

A method for determining an opening voltage of an injector having a piezo actuator, in particular an injector of an internal combustion engine, in which an output voltage is applied at the piezo actuator in the closed state of the injector, and the voltage is lowered by energizing the piezo actuator so as to open the injector. The energy supply is interrupted at a holding voltage and the voltage change present at the piezo actuator is then measured over the time, the reaching of the opening voltage being inferred in the case of a voltage rise.

The invention discloses an on-line detection method for SF6 gas in electrical equipment. On-line mass spectrometer is employed for detection analysis. An employed ionization source of the on-line mass spectrometer is a photoelectron ionization source. A sample gas is firstly subjected to dedusting processing before being introduced, and directly enters a sample-introduction system, and is introduced to the on-line mass spectrometer under the condition of constant temperature by a capillary. The method does not need any sampled subjected to pretreatment, the detection speed is fast, the analysis time and the processing time are in 1 min, the sensitivity is high, and the method is suitable for on-site direct detection on SF6 gas in electrical equipment.

The invention relates to a rock analysis gas high-vacuum degassing and gas-collecting device. The device comprises a degassing device and a gas collecting device. The degassing device comprises a stainless steel tank body and a gas pressure detector. Stainless steel balls are disposed in the stainless steel tank body. A stainless steel sealed cap is disposed on the upper portion of the stainless steel tank body. An analysis gas collecting port, a vacuum pump connecting port and the gas pressure detector are respectively disposed on the stainless steel sealed cap. The gas collecting device comprises a glass tank body, a push rod and a needle tube, wherein a sealed piston is arranged on the end portion of the push rod. The push rod is disposed at one end of the glass tank body and the needle tube is disposed at the other end of the glass tank body. The sealed piston is disposed in the glass tank body. The rock analysis gas high-vacuum degassing and gas-collecting device is wide in application range, large in the amount of obtained analysis gas, short in vacuum broken time and low in temperature, and effectively improves the precision and reliability of component data of the analysis gas and isotope composition data.

The invention discloses a saline nasal sprayer which comprises a bottle body, a pump and a bottle cap. The pump is installed on the bottle body and used for pumping liquid in the bottle body. The bottle cap is buckled with the bottle body to form a closed containing cavity. The pump is located in the containing cavity. The pump comprises a spray pipe which is provided with a bacteria filtering membrane used for preventing bacteria from entering the bottle body, and the pore diameter of the bacteria filtering membrane is smaller than or equal to 0.22 micrometer. According to the saline nasal sprayer, the bacteria filtering membrane for preventing sucking bacteria back is arranged in the spray pipe, and the diameter of the bacteria filtering membrane is smaller than or equal to 0.22 micrometer so that the liquid can be effectively prevented from being sucked back, and bacteria can be filtered away to prevent secondary pollution.

The invention provides a fuel injection control system of a flexible fuel engine and belongs to the field of control of engines. The system is characterized in that the flexible fuel engine with an independent PI (port injection) system and an independent DI (direct injection) system is coordinatively controlled through an electronic control unit, so that the PI system and the DI system can operate simultaneously and also can operate independently; when the engine is started, the PI system operates independently; through detecting signals of a liquid level sensor I, an engine temperature sensor and a crank shaft position sensor, the electronic control unit judges whether the DI system operates or not, if conditions are met, the DI system can operate normally; the fuel injection amount and injection timing of the PI system and the DI system as well as the ignition timing and ignition energy storage period of a spark plug are regulated; through the principle of calibrating the fuel charge pulse spectrum of the PI system and the DI system based on equal heat energy of a gasoline engine with an equal output volume and by virtue of the accurate design and assembly of installation positions of a DI fuel injector and the spark plug as well as a corresponding control strategy, thin and layered combustion can be realized, detonation can be avoided, the fuel economy is improved and the emission is reduced.

The invention discloses a method for preparing usnic acid. The method comprises the following steps of: 1) crushing usnea longissima and blending the crushed usnea longissima with an organic solvent, and performing refluxing extraction to obtain usnic acid crude extracts; and 2) selecting a two-phase solvent system to separate the usnic acid crude extracts obtained by step 1) by high speed counter-current chromatography to obtain the usnic acid. The method adopts the high speed counter-current chromatography for separating the usnic acid; and compared with conventional experimental preparation method, the method has the obvious advantages of large sample volume at one time, high separation capability, short separation time, small sample loss and synchronous completion of separation and purification. The method provided by the invention is suitable for a high speed counter-current chromatograph with the column capacity of 325ml, and the usnic acid prepared by the method has a purity of up to 99 percent and a very important application value.

The present invention relates to a DNA separation technique, in particular to a micro-fluidic chip for online DNA pre-concentration and separation. The chip consists of a leading buffer pool, a sample pool, a sample waste liquid pool, a buffer waste liquid pool, a terminating buffer pool and channels between the pools, wherein, the terminating buffer pool is arranged at the outer side of the sample pool, and the leading buffer pool is arranged between the sample pool and the buffer waste liquid pool. A separation detection point is arranged near the inside of the buffer waste liquid pool, and a pre-concentration detection point is arranged at the crossing point of an extending channel and a separation channel of the leading buffer pool. The present invention combines online electrophoresis pre-concentration and electrophoresis separation after concentration of DNA samples into the micro-fluidic chip which is of flexible design, simple processing, convenient operation, high sensitivity and extensive application.

A major injection molding machine comprises a control system mounted on a base, and three injecting devices positioned above a control system and an upper mold plate and arranged in the shape of Chinese character Pin along the length direction of a mold. Each injecting device is provided with a plasticizing device and a feeding device; four mode-locked oil cylinders in a mode-locked part are arranged in a quadrangle shape, wherein, every two mode-locked oil cylinders share one cylinder body; eight tie bars are divided into two parts and respectively connected onto the cylinder body of a mode-locked oil cylinder and an upper mold plate; a moveable mold plate arranged between the upper mold plate and the cylinder body of the mode-locked oil cylinder slides up and down along a guide rail formed by the eight tie bars; a cold runner is fixed on the upper mold plate; the base of a mold stripping device is fixed on the moveable mold plate; four moveable cushion blocks and cushion block oil cylinders are connected under the moveable mold plate through the rail formed by the eight tie bars. The mold is divided into an upper mold and a lower mold, wherein the upper mold in fixed on the cold runner, and the lower mold is connected with the sliding plate of the mold stripping device.

The invention discloses a fermentation preparation process of Streptomyces marinensis and a secondary metabolite thereof. The strain is characterized by having a preservation number of CGMCC No. 11468. The fermentation process specifically includes the steps of: inoculating Streptomyces marinensis to PDA, culturing in an incubator at 27.5 DEG C for 2 d; picking a single colony, inoculating to a seed culture medium, and culturing at 27.5 DEG C for 2 d; inoculating 5% by volume of a seed liquid to a fermentation medium, culturing at 27.5 DEG C for 11 d under the condition of 150 r/min; extracting a metabolite; and finally, separating and purifying a sampling liquid by a high-speed countercurrent chromatography to obtain a product. The process has the advantages of high preparation speed, and high product purity and yield.

The invention discloses a method for separating and preparing ricinine, which comprises the following steps: 1) extracting castor meal of castor seeds by extract to obtain crude extract of the ricinine; and 2) selecting a two-phase solvent system and adopting a high-speed counter current chromatography to separate and purify the crude extract of the ricinine obtained in step 1) to obtain the ricinine, wherein the two-phase solvent system in step 2) is methylene dichloride/methanol/water, or 1,2-dichloroethane/methanol/water, or methenyl chloride/methanol/water, and is preferably the methenyl chloride/methanol/water in the ratio of 2:1:1; the top phase in the two phases is an immobile phase, and the bottom phase is a mobile phase; and the rotating speed of a separation column for separation and purification is between 500 and 1,000 rpm, the flow rate of the mobile phase in the separation column is between 3 and 6ml/min, and the temperature of the two-phase solvent system in the separation column is between 20 and 30 DEG C. The ricinine prepared by the method has the purity of 98 percent.

The invention relates to a low-molecular-weight heparin molecular weight and molecular weight distribution detection method. High performance liquid chromatography is used, the method includes the following steps that firstly, a low-molecular-weight heparin sodium standard substance solution is prepared; secondly, a low-molecular-weight heparin sodium molecular weight calibration standard solution is prepared; thirdly, a test sample solution is prepared; fourthly, a 0.01% sodium azide solution is prepared; fifthly, the 0.01% sodium azide solution, the low-molecular-weight heparin sodium standard substance solution, the low-molecular-weight heparin sodium molecular weight calibration standard solution and the test sample solution are injected into a high performance liquid chromatograph respectively to obtain a chromatogram, the molecular weight of a test sample is calculated and a molecular weight distribution result is obtained according to the chromatogram.

The invention relates to a machine needle cooling mechanism of a sewing machine, a sewing machine and an air suction and exhaust mechanism, wherein the air injection amount can be increased. According to the technical scheme of the invention, a cover part is covered onto a cylinder part. A valve chamber is formed between the cover part and the upper end of the cylinder part. The cover part is provided with a suction port and an exhaust port. The valve chamber is communicated with the outside via the suction port and the exhaust port. A circular ring-shaped valve core with a circulation port at the center thereof is arranged in the valve chamber. The valve core is in a non-fixed state in the valve chamber and is capable of moving up and down. A piston is arranged at the upper end portion of a needle bar. The needle bar moves up and down to drive the piston to move downwards, and the external air enters the valve chamber via the suction port to push the valve core downwards. The air that enters the valve chamber flows into a pump chamber via the circulating port of the valve core. When the piston moves upwards, the piston compresses the air the pump chamber. The compressed air pushes the valve core and then the valve core blocks the suction port. The compressed air is injected to the outside via a pipeline through the circulating port and the exhaust port, so that the machine needle of the sewing machine can be cooled.

The invention relates to a compound collecting method based on low-pH-value capillary zone electrophresis, and belongs to the technical field of bio-separation and analysis. The method comprises the steps of incubating protein and a fluorescence labeling ssDNA (single-stranded DNA) library on ice after mixing; separating an incubated mixed sample by low-pH-value capillary zone electrophresis, wherein the pH value of electrophresis running buffer liquid is less than 3; in electrophresis separation, moving dissociated protein, dissociated ssDNA and a compound formed by the protein and the ssDNA in the mixed sample in the direction opposite to the charge characteristic according to charge characteristics of the dissociated protein, dissociated ssDNA and the compound formed by protein and ssDNA respectively; carrying out CE-LIF (capillary electrophresis laser induced fluorescence detector) analysis on collection collected at the outlet end and the inlet end of a capillary, and testing the method to be feasible. The method can inhibit electroosmotic flow and inhibit the adsorption of positive charge samples and alkaline protein on the inner wall of the capillary; the online separation of samples with different charge types is realized; the sample online enrichment amount can be increased through increasing the sample feed amount; more protein and ssDNA compounds can be obtained through analysis once.

Provided is a mixer. The mixer comprises a mixing drum, a head cover is arranged on the mixing drum, a main pipe is installed on the head cover, a pressure type nozzle extending into the mixing drum is installed on the main pipe, a mist vent of the pressure type nozzle faces downwards, multiple mounting grooves which extend in the radial direction along the head cover and are evenly distributed in the circumferential direction are formed in the head cover, branched pipes which are communicated with the main pipe are installed in the mounting grooves, multiple pressure type nozzles extending into the mixing drum are installed on the branched pipes, mist vents of the multiple pressure type nozzles face downwards, the depths, extending into the mixing drum, of pressure type nozzles installed on the branched pipes are different from the depth, extending into the mixing drum, of the pressure type nozzle on the main pipe, head cover plates which cover the mounting grooves are arranged on the mounting grooves and hinged to the head cover, a big-end-down cone-shaped mist collecting cover is installed on the inner wall close to the edge of the head cover, and the diameter of the major diameter end is smaller than or equal to that of the head cover. According to the mixer, the radiating area can be larger when atomized absolute ethyl alcohol is sprayed out, the atomized absolute ethyl alcohol can make contact with carborundum in time to be mixed fully and evenly.

The method of the invention includes the injection of fuel in a first constant-volume measuring chamber (3) in which the pressure (P) and the temperature (T) are measured, and the partial draining of said first chamber into a second variable-volume measuring chamber (8) based on the movement of a piston (11), said movement being measured, wherein the partial draining of the first chamber into the second chamber after an injection is carried out until the pressure (Po) existing in the first chamber before the injection is recovered. The draining of the first chamber into the second after each injection is carried out several times consecutively, and the second chamber itself is drained each time. The volumetric measures made by moving the piston (11) for each filling/draining of the second chamber are added in order to obtain a total volume. The method is useful for high injection rates.

The invention discloses a detection method of relevant substances of ibuprofen injection. The relevant substances comprise arginine. A high performance liquid chromatography method is used for detection; the relevant substances are subjected to qualitative or quantitative detection. The detection conditions comprise a detector being an ELSD detector, a chromatographic column being an alkyl silanebonded silica gel column or an amino column, flowing phases including an organic phase and a water phase at the volume ratio of (50 to 70):(50 to 30) (preferably 65:35). By using the method provided by the invention, the relevant substance of the arginine can be accurately monitored; the guarantee is provided for the quality and safety of the ibuprofen injection.