57results about How to "Improve jetting accuracy" patented technology

The invention relates to a controller, in particular to a urea solution spray electronic controller of a selectively catalytic reduction system. According to the technical scheme provided by the invention, the urea solution spray electronic controller of the selectively catalytic reduction system comprises a sensor module, a control module, an actuator drive module, a communication module and a power supply module, wherein the output end of the sensor module is connected with the input end of the control module; the output end of the control module is connected with the input ends of a urea solution nozzle driving circuit, a urea solution hydraulic pump driving circuit, a urea solution heating device and a urea tank liquid level alarm driving circuit in the actuator driving module; the output end of the power supply module is connected with the power supply ends of the control module and the sensor modules respectively; and the control module and the communication module are mutually connected. The controller can accurately control the spray amount of urea and has high spray accuracy and high adaptability.

The invention relates to a fuel injection valve which is particularly used for injecting high-pressure fuel from a high-pressure accumulation cavity into a diesel engine cylinder in a high-pressure common rail injection system of a diesel engine, and belongs to the technical field of engine fuel injection. The fuel injection valve comprises a control valve assembly, an electromagnet assembly, an electromagnet pressing cap, an electromagnet spring, a throttling orifice plate, a fuel injector body, a control piston and an ejector pin, wherein the throttling orifice plate is arranged in a throttling orifice plate chamber of the fuel injector body; the throttling orifice plate is located at the bottom of a control valve seat; a fuel injector body fuel return channel and a main fuel return hole which are staggered from each other are formed in the fuel injector body; and the upper end of the main fuel return hole is connected with the throttling orifice plate chamber. According to the fuel injection valve, a low-pressure fuel path system of the fuel injection valve is optimized; by a method of introducing static returned fuel with relatively low temperature to an electromagnetic actuator, the electromagnet assembly is effectively cooled; and meanwhile, by flowing of the returned fuel, a large quantity of harmful bubbles accumulated in an electromagnet and armature chamber can be brought out of the fuel injector body.

The invention discloses a spot gluing valve based on giant magnetostrictive rod drive, which comprises a spray needle (13) and a valve body. An end cover (3) is fixed on a shell (12), and an excitation coil (11) is fixed in the shell (12) through the end cover (3); an elastic pre-tightening device is arranged on the end cover (3); the upper end of the spray needle (13) is tightly pressed by the elastic pre-tightening device, and the lower end of the spray needle (13) enters the valve body through the shell (12); a giant magnetostrictive rod is arranged at the center of the excitation coil (11); one end of the giant magnetostrictive rod is tightly butted and fixed on the shell (12), and the other end of the giant magnetostrictive rod is butted on the spray needle (13) which is tightly pressed by the elastic pre-tightening device through a magnetic conduction sheet (8); the end cover (3), the magnetic conduction sheet (8) and the shell (12) are magnetic conduction materials; and the end cover (3), the magnetic conduction sheet (8), the shell (12) and the giant magnetostrictive rod form a closed magnetic circuit. In the invention, the spot gluing valve based on giant magnetostrictive rod drive has the advantages of simple structure, convenient use, high spraying frequency, high spraying accuracy and long service life.

The invention discloses an AB dispenser adhesive outlet mixing valve which comprises a valve body and a valve channel, wherein the valve body is provided with an upper valve port and a lower valve port, and the valve channel is formed in the valve body and connected with the upper valve port and the lower valve port. The valve body is further provided with an air inlet connecting the valve channel and an external air pump. The AB dispenser adhesive outlet mixing valve is characterized in that the valve channel is provided with one or more bent parts. Compared with a conventional adhesive outlet valve with a straight valve channel, due to the fact that the bent parts are arranged in the valve channel, certain bearing faces are provided for adhesives to resist gravity, and therefore the adhesive leakage phenomenon under the non-pressurized condition can be effectively prevented, and the adhesives and labor cleaning cost are saved; the bent valve channel and strong pressure interact with each other, the adhesives can be well stirred, the mixing effect of the adhesives in the valve channel is greatly improved, and the quality of dispensed products is further improved.

The invention provides a segmented pressure buildup method for an exhaust gas after-treatment system. The segmented pressure buildup method at least comprises the following steps of: S 0. judging whether an engine is started, and if the engine is started, executing the step S1; S1. carrying out first-stage pressure buildup, to be specific, driving a pump component to operate at the first pump speed, checking whether the outlet pressure of the pump component exceeds a threshold value, if yes, executing the step S3, and if not, executing the step S2; S2. carrying out second-stage pressure buildup, to be specific, driving the pump component to operate at the second pump speed and checking whether the outlet pressure of the pump component exceeds the threshold value, if yes, executing the stepS3, and if not, executing the step Sn; S3. pressure maintaining stage, to be specific, judging whether the pressure maintaining is successful, if yes, the pressure buildup is successful, and if not,executing the step Sn; and Sn. if the first pressure buildup fails, driving the pump component to reversely pump, then carrying out secondary pressure buildup and judging whether the secondary pressure buildup is successful, if yes, the pressure buildup is successful, and if not, the pressure buildup fails.

The invention relates to an electromagnetic nozzle based on an MEMS process. The electromagnetic nozzle based on the MEMS process comprises a conducting coil, a soft magnetic material, a silicon material, a control chip, a conducting fluid and an electrode pair, wherein the conducting coil is arranged in the soft magnetic material, the silicon material coats the soft magnetic material, the positive electrode and the negative electrode of the conducting coil are respectively connected with the positive electrode and the negative electrode of the electrode pair, the control chip is arranged at the top of the silicon material, the conducting fluid flows out of the bottom of a spray hole penetrating through the control chip, the silicon material and the soft magnetic material, and the electrode pair is connected with the control chip at the top after penetrating through the soft magnetic material and the silicon material, thereby achieving micro-flowing control on the conducting fluid. After the micro electromagnetic nozzle manufactured based on the MEMS process is electrified, the conducting coil in series connection generates a magnetic field, the electrode pair generates an electric field, and an electromagnetic force formed by an electromagnetic field drives the conducting fluid in the nozzle to vertically flow downwards; the electromagnetic nozzle based on the MEMS process has the characteristics of simple structure, high precision and frequency, low noise, low heat and high reliability.

The invention belongs to the technical field of vehicles, and particularly discloses an injection system used for purifying smoke discharge soot particles and a control method. The injection system comprises a controller and an injector, wherein the controller is connected with an ECU; the injector is connected with a gas exhaust tube; the controller comprises a on-off solenoid valve, a metering valve, a first pressure sensor, a second pressure sensor, a controller upper housing and a controller housing; the on-off solenoid valve, the metering valve and the first pressure sensor are mounted on the controller housing; the controller upper housing is fastened onto the controller housing; the second pressure sensor is mounted on the controller upper housing; and the controller is connected with the injector through a fuel oil pipeline. The injection system can realize stabilization of pressure for injecting fuel oil through the controller; precise control on fuel oil injection can be realized through the metering valve; the coking risk of a spray nozzle can be avoided through the structural design of the spray nozzle of the injection system; and moreover, the invention discloses the injection system used for purifying smoke discharge soot particles and the control method, and the injection system is simple in structure and is low in manufacturing cost.

The invention discloses an inkjet printing head, which comprises at least one ejection unit, a cover film matched with the ejection unit, a piezoelectric ceramic actuator and a cover plate, a fluid inflow pipeline, a fluid outflow pipeline and a driving circuit device ; The piezoelectric ceramic brake and the cover plate are connected to form a number of independent piezoelectric ceramic units that are not connected to each other; the cover plate is connected to the injection unit, and the connection contact surface is provided with a number of fluid grooves on one side of the injection unit. The position of the unit corresponds to the position of the groove of the fluid tank; the fluid channel and the cover plate form a fluid channel, and each fluid channel is correspondingly equipped with at least one nozzle leading to the outside, so that the inkjet print head forms side or end surface spraying. Correspondingly, the invention also discloses an inkjet printer. With the present invention, on the premise of increasing the deformation of the piezoelectric ceramic brake and realizing the effective ejection action of the large-diameter ink, adjacent nozzles can operate simultaneously so that all nozzles can work simultaneously, thereby improving work efficiency.

The invention provides a control method capable of improving injection precision of a urea pump obviously, and particularly relates to the urea pump used for metering based on the stepping motor principle. The injection amount and the rotating speed of a motor are in positive correlation, namely the higher the rotating speed of the motor the larger the injection amount of urea. According to the method, the corresponding relation is adopted, the closed-loop control method is utilized, control precision of the urea pump can be improved by means of primary calibration, measurement, fine calibration and repeated measurement, and therefore the precision of the actual urea injection amount and required urea injection amount is realized.

The invention discloses a self-service oral medicine feeding device, which comprises a tooth cover and a medicine feeding device. The tooth cover is an arc-shaped structure with an opening upward and adapted to the upper teeth and lower teeth in the oral cavity, and is located inside the tooth cover and is composed of The medicine feeding airbag 1 and the inflatable airbag 1 are respectively arranged from the inside to the outside; the medicine feeding device includes a fixed seat with an upward semi-spherical structure, a support plate, a support airbag and a medicine spraying airbag, and the right side of the bottom end of the fixed seat There is groove 2, and the bottom end of groove 2 is provided with a permanent magnet, and a positioning mechanism is arranged in said groove 2. The self-service oral medication device provided by the present invention is not only very comfortable, but also easy to operate , In the process of applying medicine, it will not affect activities such as drinking water, spitting, and walking. It can also complete positioning spraying through self-perception to improve spraying accuracy and spraying efficiency. At the same time, it can also control the bite force of teeth The size indirectly controls the time of drug application.

The invention relates to a gas-assisted type metered injection system and a control method thereof. The system comprises a metering pump, a double-fluid nozzle, a reducing agent storage device, a compressed air source and an aftertreatment controller. A reducing agent passageway and a compressed air passageway which are independent from each other are arranged in the metering pump. An inlet of the reducing agent passageway is connected with the reducing agent storage device, an inlet of the compressed air passageway is connected with the compressed air source, and an outlet of the reducing agent passageway and an outlet of the compressed air passageway are correspondingly connected with a liquid channel and a gas channel of the double-fluid nozzle. A liquid regulating mechanism is arranged in the reducing agent passageway, and a gas regulating mechanism is arranged in the compressed air passageway. The liquid regulating mechanism and the gas regulating mechanism are electrically connected with the aftertreatment controller. A liquid and gas mixing cavity is not contained in the metering pump, the risk that a reducing agent is likely to be crystallized in a gas-liquid mixing state is greatly avoided, and the reducing agent injection atomization effect and the injection precision are improved.

The invention relates to a controller, in particular to a urea solution spray electronic controller of a selectively catalytic reduction system. According to the technical scheme provided by the invention, the urea solution spray electronic controller of the selectively catalytic reduction system comprises a sensor module, a control module, an actuator drive module, a communication module and a power supply module, wherein the output end of the sensor module is connected with the input end of the control module; the output end of the control module is connected with the input ends of a urea solution nozzle driving circuit, a urea solution hydraulic pump driving circuit, a urea solution heating device and a urea tank liquid level alarm driving circuit in the actuator driving module; the output end of the power supply module is connected with the power supply ends of the control module and the sensor modules respectively; and the control module and the communication module are mutually connected. The controller can accurately control the spray amount of urea and has high spray accuracy and high adaptability.

The invention discloses a jet mechanism of single crystal carbonized material processing equipment, which comprises a support base, a fixing frame, a processing device, a bearing disc seat, a jet component, a main adjustment frame body and a filter purification component; the upper end surface of the support base One side is vertically fixed with a fixed frame, and a processing device is installed on the fixed frame; the center position of the upper end surface of the support base is supported and fixed with a bearing plate seat through a support column; the jet assembly is centered on the center of the bearing plate seat It can perform circular rotation around the bearing disc seat; the main adjustment frame can locally adjust the jet angle of the jet assembly on the horizontal plane, and the main adjustment frame can also make the jet assembly spray in a certain circle range through internal rotation. flow. The invention can realize accurate positioning spraying, large-area spraying and recycling electrolyte, which not only facilitates processing but also saves processing cost, improves processing efficiency and guarantees the performance of processed parts.

The invention relates to a multi-directional ultrasonic micro-droplet jetting and photocuring additive manufacturing device and method and belongs to the field of additive manufacturing. Five identical two-axis movement assemblies are separately fixed to four side surfaces and one top surface of a rack, a material supply system bracket is fixed to the upper surface of a bracket, a material supply system is fixed to the material supply system bracket, and a base plate is fixed to the rack. Focused ultrasonic transducers are used as jetting driving force, the movement of the transducers on the five two-axis movement assemblies is controlled, and materials are continuously supplied to the focused ultrasonic transducers by a liquid storing tank. The multi-directional ultrasonic micro-droplet jetting and photocuring additive manufacturing device has the advantages that micro-droplets are jet by adopting a focused ultrasonic technology, jetting precision is high, jetting speed is high, the sizes of liquid drops are not limited by a nozzle, and the blockage of a sprayer is avoided; by adopting the focused ultrasonic transducers to simultaneously work in five directions, three-dimensional additive manufacture can be realized, the mechanical properties of molded components are controllable in all directions, an auxiliary support structure does not need to be additionally arranged for molding, a complicated after-treatment technology is avoided, and manufacture cost is reduced.

The invention discloses a dispensing valve driven by a giant magnetostrictive rod, which comprises a spray needle (13) and a valve body, an end cover (3) fixed on a housing (12), and an excitation coil (11) passing through the end cover (3) fixed in the housing (12); an elastic pre-tensioning device is provided on the end cover (3); the upper end of the spray needle (13) is compressed by the elastic pre-tensioning device, and the lower end passes through the The casing (12) enters the valve body, the giant magnetostrictive rod is placed in the center of the excitation coil (11), one end is firmly fixed on the casing (12), and the other end is passed through the magnetic field. The sheet (8) bears on the said spray needle (13) compressed by the elastic pre-tensioning device, and the said end cover (3), the magnetic guide sheet (8) and the housing (12) are all It is a magnetically permeable material, and forms a closed magnetic circuit together with the giant magnetostrictive rod. The invention is a dispensing valve based on giant magnetostrictive drive with simple structure, convenient use, high spraying frequency, high spraying precision and long service life.

The invention provides a control method capable of improving injection precision of a urea pump obviously, and particularly relates to the urea pump used for metering based on the stepping motor principle. The injection amount and the rotating speed of a motor are in positive correlation, namely the higher the rotating speed of the motor the larger the injection amount of urea. According to the method, the corresponding relation is adopted, the closed-loop control method is utilized, control precision of the urea pump can be improved by means of primary calibration, measurement, fine calibration and repeated measurement, and therefore the precision of the actual urea injection amount and required urea injection amount is realized.