300results about How to "Shorten closing time" patented technology

A vaporizer delivery system for use in semiconductor manufacturing processes including a plurality of vertically stacked containers for holding a vaporizable source material. Each of the vertically stacked containers includes a plurality of vented protuberances extending into the interior of the each stacked container thereby providing channels for passage of a carrier gas between adjacent vertically stacked containers.

A fuel injector (1) for fuel injection systems of internal combustion engines is specially designed for the direct injection of fuel into the combustion chamber of an internal combustion engine. It is provided with a solenoid coil (10), a two-part armature (20a, 20b) that is acted upon through the solenoid coil (10) in a closing direction by a first resetting spring (23a), and a valve needle (3) that is connected to the larger armature part (20a) in a force-locking manner, for actuating a valve-closure member (4) which together with a valve seat surface (6) forms a sealing seat. The first armature part (20a) is acted upon in the closing direction by the first resetting spring (23a), and the second armature part (20b) is acted upon in the closing direction by the second resetting spring (23b), the spring constants of the resetting springs (23a, 23b) being different.

An IGBT is provided which comprises N+ type extended region 9 sectively formed in P+ type collector region 1 to define a built-in diode in cooperation with N+ type extended region 9, an N− type base region 2 and a P− type base region 3 in semiconducting substrate 10. N− type base region 2 comprises a recombination region 21 developed between P type base region 3 and collector electrode 8 to acquire minority carriers accumulated around recombination region 21 in first base region 2 by recombination region 21 for improvement in recovery property of the diode without increasing voltage in the forward direction since recombination region 21 does not reach between and beneath adjoining second base regions 3 in N type base region 2 for current path.

A method has been invented for separating components of a wastewater stream, the stream containing water, oil (e.g. heavy oil and/or light oil), undesirable organic material (solid and/or liquid), and contaminating solids, the method including feeding a wastewater stream to a first pre-treatment unit producing a first pretreated stream, feeding the first pretreated stream to a first centrifuge for centrifugal separation, producing a first liquid centrifuged stream, and a second liquid stream, and feeding the first liquid centrifuged stream to a second centrifuge producing a resultant centrifuged stream of recoverable oil and a water phase centrifuged stream which can be treated further or fed back to a source for re-use. The source may be a facility from the group including refineries, chemical plants, paper mill plants, and oil and gas processing facilities.

A shutter opening/closing control device is proposed which can reduce an operation noise of the shutter without increasing the manufacturing cost. The shutter opening/closing control device includes a grille shutter for opening and closing a grille opening which introduces the outside air into the engine compartment, a shutter opening and closing operating portion having a drive source for operating the shutter to be open or to be closed, a closing operation judging portion for judging whether or not the grille shutter is operated in a closing direction based on the vehicle information and a drive source torque controlling portion for controlling the drive source of the shutter opening/closing operating portion to operate the grille shutter first by a high torque and thereafter by a low torque which is lower than the high torque when the grille shutter is judged to be operated in the closing direction by the closing operation judging portion.

The circuit contains a single processing circuit, it receives the control pulse. A from the electronic control unit of the motor and output high voltage driving pulse Ah and low voltage driving pulse Al to higher extreme driving circuit separately and receive the feedback sampling current signal from lower extreme driving circuit, after processing, the low voltage driving pulse Al adjust the higher extreme driving circuit to adjust the driving circuit of the electromagnetic valve. Lower extreme driving circuit receive pulse signal B from electronic control unit of the motor, this pulse signal is same with the control signal A.

The voltage of 36-V battery (10) is dropped by the DC—DC converter (12) to charge the 12-V battery (14). The switching ON/OFF of the DC—DC converter (12) is feed forward controlled by the controlling portion (20). This can cope with the voltage change at the 36-V battery (10). The output voltage of the DC—DC converter (12) is feed back controlled by a differential amplifier (16) and PID (18) and feed back by the controlling portion (20).

The invention discloses a generation method and a device for a solenoid pilot actuated valve drive current, and is applicable to a fuel injection system of an engine. The method has the following steps: a high-end drive circuit is connected with one end of a solenoid pilot actuated valve via a sampling resistor; a low-end drive circuit is connected with the other end of the solenoid pilot actuated valve; an electronic control unit sends a summit current holding control pulse signal AH and a current feedback control pulse signal AF to a signal processing circuit, and a low-end drive circuit control pulse signal B to the low-end drive circuit; and the signal processing circuit compares the solenoid pilot actuated valve drive current fed back by the sampling resistor with a current corresponding to a reference voltage, and sends a control signal C to the high-end drive circuit. By adopting the technical scheme, the method and the device of the invention have the advantages of short opening time of the solenoid pilot actuated valve, simple and reliable hardware current feedback control circuits, high regulating frequencies, good anti-interference effect in use, low price and the total production cost.

An IGBT die structure includes an auxiliary P well region. A terminal, that is not connected to any other IGBT terminal, is coupled to the auxiliary P well region. To accelerate IGBT turn on, a current is injected into the terminal during the turn on time. The injected current causes charge carriers to be injected into the N drift layer of the IGBT, thereby reducing turn on time. To accelerate IGBT turn off, charge carriers are removed from the N drift layer by drawing current out of the terminal. To reduce V_CE(SAT), current can also be injected into the terminal during IGBT on time. An IGBT assembly involves the IGBT die structure and an associated current injection/extraction circuit. As appropriate, the circuit injects or extracts current from the terminal depending on whether the IGBT is in a turn on time or is in a turn off time.

An opening/closing valve (70) is provided in an oil feed pipe (43). When a liquid refrigerant enters from an oil separator (22) into the oil feed pipe (43), the temperature of the liquid refrigerant depressurized by the opening/closing valve (70) is suddenly lowered. When the lowering amount of the temperature detected by a temperature sensor (73) exceeds a prescribed value, it is judged that theliquid refrigerant enters into the oil feed pipe (43), and the valve (70) is closed.

The invention discloses a compound PWM control method of a high-speed switching valve. The compound PWM control method of the high-speed switching valve is characterized in that the operation processof a valve core of the high-speed switching valve is defined as four stages which comprise a valve core opening stage, a valve core maximum opening maintaining stage, a valve core closing stage and avalve core closing and maintaining stage; in the valve core opening stage, the valve core is reliably opened by controlling the duty ratio of excitation PWM; during the valve core maximum opening maintaining stage, coil current is at an optimal value by controlling the duty ratio of high-frequency PWM, and the lowest power loss of a coil is ensured; and during the valve core closing stage, the coil current unloading is accelerated by controlling the duty ratio of reverse PWM, and valve core closing time is shortened. According to the compound PWM control method of the high-speed switching valve, a compound PWM signal is similar to a conventional PWM signal, the signal is only output through a hardware digital port, and the compound PWM control method of the high-speed switching valve has the advantages of high response, low power consumption and low cost.

The venting valve assembly for casting moulds comprises a venting valve for closing a venting channel. The venting valve comprises a valve housing in which a closure member is received that is movable between an open position and a closed position. The closure member can be frictionally locked in its open position and simultaneously biased in closing direction. For frictionally locking the closure member, a chamber is provided that can be put under a hydraulic overpressure. The chamber has a wall portion that bulges towards the closure member in response to the overpressure. The wall portion is resilient such that it moves back to a position releasing the closure member once the overpressure in the chamber is reduced. For reducing the pressure in the chamber, a release valve is provided which is controlled by a sensor detecting any casting material penetrating into the venting channel. The biasing of the closure member in closing direction is performed pneumatically.

The invention discloses a method for determining a dynamic change rule of dew point temperature of an attached layer of a radiant ceiling. The method comprises the following specific steps of: firstly, determining influence factors of the dynamic change rule of the dew point temperature of the attached layer; and secondly, performing simulation by utilizing ANSYSY software to obtain sample data, and then based on SAS software, obtaining the dynamic change rule of the dew point temperature of the attached layer with a multivariate regression analysis method: y=12.78891+0.31639xb+0.19712xc-0.12698xd, wherein y is the dew point temperature of the attached layer, b is wet dissipation strength, c is a relative distance between a fresh air inlet and a test point of the attached layer, and d is a relative distance between a wet source and the test point of the attached layer. According to the method, an indoor wet diffusion model is constructed, an interaction relationship among a water supply parameter of a radiant plate, an indoor thermal and humid environment parameter and the dew point temperature of the attached layer is deeply researched, and the dynamic change rule of the dew point temperature of the attached layer is proposed with a statistic analysis method.

This invention discloses an IGBT device with its collector formed with Ge/Al and associated method of fabrication. The collector is formed on the substrate layer, which is on the back of IGBT, and contains Ge and Al thin films. After thinning and etching the back side of IGBT substrate, Ge and Al are sequentially deposited to form Ge/Al thin films on the back surface of the substrate. An annealing process is then carried out to diffuse Al into Ge thin film layer to form a P-doped Ge layer functioning as the IGBT collector. The present invention is applicable to both non punch through IGBTs as well as punch through IGBTs.

The invention relates to a valve actuator (2), comprising a magnetic core (6) with an interspace (8) and at least one bifurcating branch (7), at least one variable magnetic field generating device (16), at least one permanent magnetic field generating device (13) and at least one movable magnetic component (12), wherein the bifurcating branch (7) defines a first region (4) and a second region (5) of said magnetic core (6). Said movable magnetic component (12) is movably arranged within said interspace (8) of said magnetic core (6) in such a way that a first gap (19) is formed between a first surface (23) of said movable magnetic component (12) and a first surface (22) of said interspace (8) of said magnetic core (6), a second gap (20) is formed between a second surface (24) of said movable magnetic component (12) and a second surface (25) of said interspace (8) of said magnetic core (6), and a third gap (21) is formed between a third surface (27) of said movable magnetic component (12) and a third surface (26) of said bifurcating branch (7) of said magnetic core (6). At least one of said variable magnetic field generating devices (48, 49) is associated with said first region (4) of said magnetic core (6) and at least one of said permanent magnetic field generating devices (13) is associated with said second region (5) of said magnetic core (6). Said valve actuator (2) is designed and arranged in a way that a magnetic flux, generated by at least one at least one of said variable magnetic field generating devices (16) is able to exert a force on said at least one movable magnetic component (12) and is able to cancel the magnetic flux (48, 49), generated by at least one of said permanent magnetic field generating devices (13). At least one magnetic flux limiting means (7, 12) is provided, whose magnetic flux limit can be reached or exceeded.