544results about How to "Stable operation" patented technology

In a hybrid electric vehicle (HEV) employing a hybrid system using both an internal combustion engine and a second motor/generator as a propelling power source for vehicle propulsion, and also employing a first generator driven by the engine for power generation, an integrated HEV control system is provided to control the engine, and the first and second motor/generators. The integrated HEV control system permits operation of only the second motor/generator as the propelling power source to establish a motor propelled vehicle driving mode and simultaneously basically inhibits operation of the engine, when satisfying at least a condition that the engine misfire occurs. If a power generation requirement or a battery recharge requirement is present during the misfire period, operation of the engine is temporarily permitted for driving the first motor/generator only for a battery recharge.

In a control system for an internal combustion engine having a plurality of cylinders whose operation of the engine can be switched between full-cylinder operation during which all of the cylinders are operative and cut-off-cylinder operation during which some of the cylinders are non-operative, and running control, i.e., either cruise control during which the vehicle is controlled to run at a desired vehicle velocity or preceding vehicle follow-up control during which the vehicle is controlled to run at a desired vehicle velocity to maintain a desired inter-vehicle distance from a preceding vehicle, is performed in response to an instruction of an operator, it is judged whether a velocity error between a detected vehicle velocity and the desired vehicle velocity and load of the engine are equal to or smaller than corresponding threshold values. If the result is affirmative when the running control is in progress, it is determined that running condition of the vehicle is stable and the engine operation is switched to the cut-off-cylinder operation, thereby preventing a control hunting from happening, while ensuring to improve fuel consumption by utilizing the cut-off-cylinder operation as much as possible.

A power conversion apparatus, such as a UPS, includes a first waveform reference signal generator circuit operative to generate a first waveform reference signal responsive to an AC bus, and a second waveform reference signal generator circuit operative to generate a second waveform reference signal, e.g., a more consistently sinusoidal signal produced by another source. The apparatus further includes a control circuit that selectively generates a third waveform reference signal from the first and second waveform reference signals, and a power converter circuit (e.g., a rectifier and/or inverter) coupled to the AC bus and operative to transfer power to and/or from the AC bus responsive to the third waveform reference signal. In particular, the control circuit may be operative to weightedly combine the first and second waveform reference signals to generate the third waveform reference signal. The control circuit may weightedly combine the first and second waveform reference signals responsive to an operating parameter of the power converter, such as a voltage, a current, a power factor, a source impedance, a voltage distortion and/or a harmonic input current.

Swirl tube separator for separating solids from a gas-solid containing feed comprising a tubular housing, an inlet for introducing a gas-solids mixture at one end of said housing, a solids outlet opening at the opposite end of said housing, and a co-axial positioned tubular gas outlet conduit placed at an end of said housing, wherein along the axis of the tubular housing a vortex extender pin is present.

An intelligent elevator controlling method and device based on distributed multi-channel CAN bus is disclosed. Said device is composed of a cluster operating controller, single-elevator controllers communiated with said cluster operating controller via CAN bus, and the cage controllers, floor calling controllers, LCD controllers and speech floor reporting controllers respectively for each of elevators. Its control method is also disclosed.

The invention discloses an energy-saving low-temperature multiple-effect seawater desalting device, which is used for solving the problems of high operation cost and unstable operation of a desalting device. The energy-saving low-temperature multiple-effect seawater desalting device comprises a steam ejector, evaporators and a condenser, wherein multiple effect evaporators are connected in series; after improvement, the heat source of the device consists of a steel mill off-gas pipeline and a waste heat boiler; the waste heat boiler converts steel mill waste heat off-gas into saturated steam and overheat steam; the saturated steam and overheat steam are introduced into the first effect evaporator through the steam ejector; and the outlet of the last effect evaporator is connected with the condenser. The energy-saving low-temperature multiple-effect seawater desalting device has the advantages that: a, the waste heat boiler is introduced, the steel mill off-gas is fully utilized, the energy is saved, the operating cost of the device is reduced, and the pollution of the steelmaking off-gas on the environment is reduced; and b, the heat of finished water and strong brine is fully utilized, the temperature of the seawater at the inlet and outlet of the condenser is kept stable through intelligent pipeline control despite of the change of the temperature of seawater, and the equipment has the stable and optimized running state.

A passive optical network system based on label exchanging protocol of universal multi-protocol is prepared as connecting optical line terminal OLT to multiple optical network unit ONU by wideband passive optical distribution network , using OLT and ONU as edge router and GMPLS domain of said exchanging protocol for being connected to the other GMPLS router in said multi-protocol by communication link , using OLT as intermediate router of integrated service in system individually for controlling all communication activities , using ONU as inlet router of integrated service in system for executing command of OLT .

The present invention provides a CTCS-3 onboard device for automatic train operation and a rail transit vehicle, wherein the CTCS-3 onboard device for automatic train operation comprises: an interface module (10) and a train control command generating module (11), wherein the interface module (10) is connected to the train control command generating module (11), an automatic train protection device (20), and a train control interface (21), respectively; the train control command generating module (11) exchanges information with the automatic train protection device (20) and the train control interface (21) via the interface module (10); and the train control command generating module (11) is used to generate train control commands according to information received via the interface module (10), and transmit the train control commands to the train control interface (21) via the interface module (10), so that devices connected to the train control interface (21) can obtain and execute the commands. The CTCS-3 onboard device for automatic train operation and the rail transit car according to the present invention can efficiently and automatically control a high-speed train, which in turn enables the smooth operation and stopping precision, thereby improving passenger comfort and satisfaction.

The invention discloses batch calibration equipment and a batch calibration method for intelligent pointer-type pressure gages. The batch calibration equipment comprises a horizontal calibration platform, a horizontal testing pipe, a plurality of quick connectors for being installed on a plurality of calibration pressure meters respectively, two image acquisition devices which are located in front of the horizontal calibration platform, an image processing device, a pressurization device and a pressure regulation device which regulates pressure in the horizontal testing pipe. The batch calibration method comprises the following steps of: firstly, doing a preparation work before calibration; secondly, inputting and matching models of the pressure gages to be calibrated; thirdly, obtaining data of dial plate templates; fourth, acquiring and dividing images of dial plates, and detecting straight lines at which pointers are located; fifth, matching the templates; sixth, obtaining numberical reading of the pressure meters, and the numberical reading obtaining process comprises the following steps of: obtaining dial plate image information to be processed, matching binocular stereo-vision images and processing the data. The batch calibration equipment disclosed by the invention is reasonable in design, simple and convenient in use and operation, has a good use effect, and calibration efficiency and calibration accuracy of the pointer-type pressure gages are greatly improved.

To provide a refrigerating apparatus that can control the supercooling degree of liquid refrigerant irrespective of changes in circulating refrigerant amounts in a refrigeration cycle, a refrigerating apparatus includes a refrigeration cycle having one or more compressors or inverter compressor, a condenser, an expansion valve, and an evaporator; a liquid introduction circuit that guides decompressed refrigerant obtained by extracting one part of high pressure liquid refrigerant from the refrigeration cycle and decompressing, to a supercooling heat exchanger provided in the refrigeration cycle to perform heat transfer between the decompressed refrigerant and high pressure liquid refrigerant, and then introduces the refrigerant into refrigerant for intake into the compressors or inverter compressor or an intermediate pressure part of these compressors; a controller controlling shutdown of the compressors or driving frequencies of the inverter compressor based on suction pressure detection values with respect to pressure setting values for suction pressure of the compressors or inverter compressor; and a flow controller controlling the amount of high pressure liquid refrigerant flowing through the liquid introduction circuit based on the circulating volume of refrigerant in the refrigeration cycle.