719 results about "Engine power" patented technology

The invention provides a ship main engine power real-time optimization method based on a hybrid network model, and belongs to the technical field of ship energy saving.A hybrid neural network model is constructed, the hybrid neural network model is based on a physical information neural network, a KAN network is introduced to serve as a front-end network structure, and the power of a ship main engine is optimized in real time; the high-dimensional nonlinear mapping module is used for establishing high-dimensional nonlinear mapping from navigational speed, a ship type parameter matrix, propulsive efficiency, fuel conversion efficiency and environmental factors to the minimum power of a main engine; a composite loss function is adopted to train the hybrid neural network model, wherein the composite loss function is formed by weighted summation of mean square error loss, dynamics constraint loss, propulsive efficiency constraint loss and fuel consumption constraint loss; using the trained hybrid neural network model to receive ship operation parameters and environment parameters collected in real time, and outputting a minimum power prediction value of the ship main engine through one-time forward propagation calculation to realize real-time optimization of the main engine power.

The invention provides a series-parallel hybrid power tractor driving system. The series-parallel hybrid power tractor driving system comprises an engine, a P1 motor used for generating electricity or starting the engine, a PS motor used for independent or coupled driving and a series-parallel hybrid power tractor transmission system. The invention further provides a control method of the driving system. Confluence and diversion of engine power and speed change of the tractor are controlled through the P1 motor, the PS motor, the rotating speed coupling mechanism, the torque coupling mechanism, the clutch and the brake. According to the series-parallel connection type hybrid power tractor driving system, a multi-mode driving mode can be achieved to adapt to operation in a complex environment, the dynamic property and economical efficiency of a tractor are improved, and the series-parallel connection type hybrid power tractor driving system has the advantages of interval stepless speed change, precise control and the like.

The invention provides a power control method and a related device, and relates to the field of range extenders. After a hydraulic system working instruction is received, if it is determined that a power advance control strategy needs to be adopted, before the current of a hydraulic displacement control valve is adjusted according to the hydraulic system working instruction, the power advance control strategy is adopted; the power of an engine and the power of a target generator are adjusted to the total power required by the engine, which is calculated based on the target hydraulic power and the power generation required power, so that the current engine power can meet the power generation power requirement and the power requirement of a hydraulic system after responding to a working instruction of the hydraulic system; and then the hydraulic displacement control valve current is adjusted according to the hydraulic system working instruction, after the hydraulic displacement control valve current is adjusted, the hydraulic power begins to change, and during the hydraulic power change period, the power of the target generator can be adjusted based on the hydraulic power change, so that the engine can provide the hydraulic power needed by the hydraulic system in real time.

An apparatus and methods for a rotor pack are provided for a positive displacement supercharger that produces greater engine power output without loss of best seal between the rotors or between the rotors and an interior surface of an enclosing case. The rotors include relief zones and cupped portions at an intake airflow side of each lobe comprising the rotors. The relief zones allow additional airflow to enter the rotor pack while the cupped portions scoop additional airflow into the rotor pack during operation of the supercharger. Tapered radius portions of an enclosing case allow additional airflow to be dragged into the rotor pack. Pressure relief portions on a rotor bearing plate and angled portions on each lobe extend compression events during operation of the rotor pack. The angled portions reduce a margin of the lobes to sharpened edges without affecting the diameter of the margin.

The invention relates to the technical field of vehicle transmission power generation, in particular to a vehicle-mounted engine power takeoff driven parking power generation device which comprises a power takeoff and a power generator, a transmission shaft component is arranged between the power takeoff and the power generator, and the power takeoff drives the power generator to work and generate power through the transmission shaft component; the transmission shaft component comprises a first split shaft and a second split shaft which are coaxially arranged, an axial lock sleeve is fixedly arranged on the first split shaft, and the axial lock sleeve axially limits the second split shaft; according to the parking power generation device driven by the power takeoff of the vehicle-mounted engine, a vehicle can have higher safety redundancy, and when the power takeoff breaks down and cannot be connected with power or disconnected from the power, the working condition can be automatically recognized, and power takeoff is disconnected or power takeoff is connected in an emergency.

A retrofit mining haul truck includes a hybrid hydrogen fuel cell / battery-based powerplant in place of a carbon fuel-based powerplant. The retrofit mining haul truck includes a frame, a tray coupled to the frame, and a deck coupled to the frame forward of at least a portion of the tray. A battery system is mounted to the deck of the retrofit mining haul truck. A hydrogen storage system (HSS) is installed in an engine bay volume of the retrofit mining haul truck. The engine bay was configured to contain a combustion engine (e.g., a diesel engine) prior to retrofitting the retrofit mining haul truck. At least a portion of a fuel cell system is installed in a wheel pocket of the retrofit mining haul truck. The wheel pocket was configured to contain a diesel tank prior to retrofitting the retrofit mining haul truck.

A system including a engine having a low spool and a high spool, a first hybrid electric motor connected to the low spool and a second hybrid electric motor connected to the high spool. An auto-throttle controls an amount of power provided to the engine responsive to at least one aircraft parameter. A power splitting algorithm implemented between the auto-throttle and at least one of the first and second hybrid electric motors determines a power split dividing the total engine power into the power produced by burning fuel and electrical power provided to the at least one of the first and second hybrid electric motors responsive to control signals from the auto-throttle.

The invention discloses a method for evaluating the EEDI contribution of a wing-shaped sail based on actual ship sea trials, and relates to the technical field of ships. The method comprises: conducting actual ship performance tests on ships equipped with sails to obtain main engine power required to maintain a target speed when the sails are in different operating states at various relative wind direction angles; obtaining a net thrust test coefficient of the sail at various relative wind direction angles at the target speed based on the main engine power; obtaining a net thrust simulation coefficient curve of the sail at various relative wind direction angles at the target speed based on a four-degree-of-freedom motion model of the ship; comparing the net thrust simulation coefficient curve of the sail with the net thrust test coefficient of the sail to establish a revised four-degree-of-freedom motion model of the ship in a sail-raising operating state; and calculating sail thrust matrix elements and sail EEDI contribution corresponding to a reference speed and any combination of wind field conditions based on the four-degree-of-freedom motion model of the ship in the sail-raising operating state and the four-degree-of-freedom motion model of the ship without sails. The method has the characteristics of being objective, realistic, and operational.

The present embodiments may provide a steer-by-wire steering apparatus which enables a driver to use a function for controlling an automobile, such as automatic parking, lane keeping, driving assistance according to a road surface condition, steering-vibration damping, or autonomous driving control, to improve the driver's convenience, and allows removal of hydraulic pressure-related components to prevent consumption of engine power by the components and thus can satisfy the high power and rigidity required for a steering device of a commercial vehicle.

The invention provides a fuel-based, single-engine multirotor drone, wherein the drone comprises a body, a turboshaft engine to generate rotational movement, a plurality of rotors, a plurality of pulleys, a plurality of transmission belts, and a gearbox assembly. The gearbox assembly comprises a pair of coaxial counter-rotating gears which are coupled to a pair of coaxial counter-rotating shafts, wherein the rotational movement of the engine is transferred synchronously from the counter-rotating shafts of the gearbox to the plurality of the rotors through the plurality of pulleys and transmission belts.

An unmanned aerial vehicle having a petrochemical-based engine powering at least one rotational blade for achieving flight provides for improved vegetation removal. The AEV includes a power transformer connected to the engine, the transformer generating electrical power from the operation of the engine and a plurality of electrically-powered blade units, each unit having a blade powered by a motor. In the AEV, a plurality of electrical connectors provide for transferring the electrical power generated by the transformer to each of the electrical motors of the blade units for causing circular rotation of the corresponding blade such that unmanned aerial vehicle is operative to trim the vegetation using the plurality of blade units powered by the engine.

The invention relates to a method for automatically controlling turbine engines of a rotorcraft when one turbine engine breaks down. Upon detection of a failure of a first turbine engine of the aircraft, the automatic control method comprises:-determining (102) a flight phase, then, when the aircraft is in a phase other than the take-off phase-determining (102) the flight phase by gradually decreasing the power of the first turbine engine and gradually increasing the power of at least one second turbine engine; starting (110) the turbine engine to operate in an offset mode in which a gradual decrease in the first turbine engine power and a gradual increase in the at least one second turbine engine power are controlled in a complementary manner to maintain the rotational speed of the rotor at the rotational speed setpoint speed of the rotor, starting (120) an engine abnormality indication, and setting (130) a power limiter.

The invention provides a hybrid power truck energy management and control method and device and a commercial vehicle, and belongs to the technical field of commercial vehicle energy management and control. In the vehicle running process, a vehicle control unit obtains commercial vehicle running state information and transmits the commercial vehicle running state information to a hybrid power truck control module; the hybrid power truck control module inputs the operation state information of the commercial vehicle into the hybrid power truck model; the hybrid power truck model calculates the working point of a current engine according to the rotating speed and torque of the engine, and the supercharging parameters of the electronic supercharger are estimated by combining the exhaust temperature and the exhaust gas flow; the torque distribution of the motor and the charging and discharging state of the battery are determined based on the driving resistance of the vehicle and the operation intention of the driver. Motor torque assistance is reasonably distributed, balance optimization of power and energy consumption is achieved, and fuel economy and power performance are improved. The engine power output is improved; and the working efficiency and the reliability of the electronic supercharger are also improved.

The invention relates to the technical field of vehicle speed control, in particular to a chemical dangerous chemical vehicle safety management and control method based on big data, and the method comprises the steps: obtaining vehicle speed data and engine power data in a vehicle operation process; the maximum vehicle speed of the vehicle is regulated and controlled once every preset duration, in any regulation and control process, a preset temperature threshold value is corrected by means of the average stability degree of vehicle speed data in the regulation and control time period, the correction value is the product of the average stability degree and the temperature threshold value, and the optimal solution of the maximum vehicle speed in the regulation and control time period is found based on the correction value by means of a simulated annealing algorithm. And controlling the vehicle speed based on the optimal solution. According to the invention, the speed of the vehicle can be accurately controlled.

The invention provides a gear wind resistance power loss prediction method and system, computer equipment and a medium, and belongs to the field of aero-engine power transmission, and the method comprises the steps: obtaining physical parameters of a to-be-predicted gear; according to the physical parameters of the to-be-predicted gear, gear structure parameters are extracted, tooth surface torque parameters and fluid mechanics parameters are calculated, and the gear structure parameters, the tooth surface torque parameters and the fluid mechanics parameters of the to-be-predicted gear are consistent with the same type of parameters in the sample space in sequence and dimension; the gear structure parameters, the tooth surface torque parameters and the fluid mechanics parameters of the to-be-predicted gear are input into a pre-trained power loss prediction model, the wind resistance power loss of the to-be-predicted gear is obtained, and the power loss prediction model is obtained through a sample space training deep learning model. Compared with numerical simulation, the method has the advantage that the power loss prediction efficiency is remarkably improved.

The invention discloses liquid rocket system polarity test equipment and a test method, and the method comprises the steps: carrying out the analysis of the working principles of a rocket system polarity test servo system, a final correction attitude control correction system and an engine power system, selecting a corresponding data collection device, and installing the data collection device at a to-be-detected position. During testing, a corresponding data acquisition device is used for carrying out data acquisition on parts with relative position changes or electromagnetic valve actions in the servo system, the final correction attitude control correction system and the engine power system. The data transmission system transmits the collected test data to the control and data processing system. And the control and data processing system compares the received test data with the instruction data to realize automatic interpretation of the system polarity test. The liquid rocket polarity test data and the system data are effectively and deeply fused, the accurate closed loop of the data is realized, the requirements of systematization and automation of carrier rocket test are met, the product reliability is improved, and the production efficiency is also improved.

The present invention proposes a performance evaluation method, system, storage medium and vehicle for an engine cooling system, the method comprising: obtaining the vehicle thermal management issuance operating conditions, water temperature target and pressure target according to vehicle parameters; performing an engine thermal load test according to engine speed, engine power and engine torque to obtain the thermal load of the engine under the corresponding vehicle operating conditions; constructing an initial three-dimensional model of the cooling system according to the thermal load of the engine, and obtaining the water flow, pressure distribution and vehicle water temperature distribution of each component of the cooling system according to the initial three-dimensional model of the cooling system to evaluate the cooling performance, and optimizing the initial three-dimensional model of the cooling system according to the evaluation results to obtain the final three-dimensional model of the cooling system. The performance evaluation method of the engine cooling system proposed by the present invention can perform a comprehensive evaluation before designing the cooling system, and continuously optimize the evaluation results so that the engine cooling system can achieve a better cooling effect.

The invention relates to the technical field of power control, and discloses a main hydraulic power setting method and device of an excavator, the excavator and a storage medium. The actual power of an engine cooling system is calculated based on the current engine water temperature or the engine intercooling temperature, the actual air conditioner refrigeration power is determined based on the air conditioner refrigeration state, and then the difference between the maximum engine power and the actual power of a hydraulic cooling system, the actual power of the engine cooling system, the actual air conditioner refrigeration power and the preset engine reserved power is obtained; and finally, the target main hydraulic power is applied to a main pump corresponding to the excavator to operate, so that it is guaranteed that the hydraulic main power is in a better state, and the engine power is brought into play to a greater extent.

A powertrain and control method that generates and transfers drive torque to a driveline of a hybrid electric vehicle is provided. The powertrain includes an internal combustion engine (ICE), at least one electric motor powered by a high-voltage battery, an integrated dual charge module (IDCM) and a controller. The controller is configured to: determine whether an external load is connected to the vehicle through the IDCM; determine an available engine-based power; determine whether the available engine-based power is above a threshold to support thermal loads; command power consumption from the high-voltage battery based on a determination that available engine-based power is not above the threshold; command power consumption from the ICE based on a determination that available engine-based power is above the threshold; and command a blending of power between the high-voltage battery and the ICE.

The invention relates to the technical field of compressed air energy storage, and discloses an anti-galloping control method and device applied to power generation of an expansion machine, and the method is applied to an anti-galloping device comprising a power generator connected with the expansion machine and a load compressor. The method comprises the steps that the rotating speed of the expansion machine is monitored in real time; when it is judged that the expansion machine has the galloping risk based on the rotating speed, an overspeed-preventing quick-opening valve is controlled to be opened, and external air enters a load compressor; wherein the grading response mechanism comprises the following steps: dividing the galloping risk into a plurality of risk grades according to the amplitude and / or duration of the rotating speed exceeding the rated rotating speed; and aiming at different risk levels, controlling the anti-overspeed quick-opening valve to be opened to different preset opening degrees, and applying corresponding loads to the two compressors. According to the invention, a set of intelligent anti-galloping control system is constructed, and the operation continuity and reliability of the compressed air energy storage system are maintained to the greatest extent while the safety of the expansion machine is guaranteed.

To provide a controller of a hybrid vehicle which can suppress a relay selectively connecting between a power storage device and a control unit to drive a motor from being solid-phase bonded.SOLUTION: A controller of a hybrid vehicle comprises: a first motor which converts power of an engine into electric power; a second motor which is driven by the electric power generated by the first motor; a step-up converter which boosts output voltage of a battery to be output to respective motors; a relay which is arranged between the battery and the step-up converter; a low voltage capacitor which is arranged close to the battery side relative to the step-up converter; and a high voltage capacitor which is arranged close to respective motor sides relative to the step-up converter. In a case that conductive state of the relay continues for a predetermined time period or more, voltage of the high voltage capacitor is kept being higher than that of the low voltage capacitor (step S3) and then the relay is switched to a cut-off state (step S6).SELECTED DRAWING: Figure 4

The invention discloses an excavator heat balance performance prediction method, system and device and a storage medium. The method comprises the steps that a heat balance performance test of a standard excavation working condition is conducted; respectively establishing an engine heat dissipating capacity Qw calculation model and an engine air inflow mair calculation model; obtaining Qw and mair under the standard excavation working condition; building a one-dimensional cooling system model; cabin resistance coefficient calibration is completed; setting the heat dissipation power of the hydraulic system, calculating the real-time oil temperature of the hydraulic oil tank based on the one-dimensional cooling system model, adjusting the heat dissipation power of the hydraulic system to enable the difference value between the real-time oil temperature of the hydraulic oil tank and the oil temperature of the hydraulic oil tank to be smaller than a set value, and calculating the ratio b of the heat dissipation power of the hydraulic system to the engine power; and on the basis of a calculation model of Qw and mair, b and the calibrated cabin resistance coefficient, predicting the heat balance performance of the excavator under the target working condition. According to the method, the design accuracy and economy can be improved, the prediction of the full-working-condition heat balance performance is realized, and the high-temperature fault solving efficiency is accelerated.

The invention discloses an air cooling machine power enhancement potential quantitative estimation method, and belongs to the technical field of engine power estimation. The air cooling machine power strengthening potential quantitative estimation method comprises the steps that air cooling machine performance parameters, a heat engine state reverse dragging cylinder pressure curve and a heat release rate curve are obtained; a one-dimensional simulation model of the air cooler is established, and thermodynamic cycle gas state parameters of the air cooler are obtained; establishing a three-dimensional combustion simulation model, and calculating the thermodynamic state of gas in a combustion chamber in a compression stage after an intake valve is closed; establishing a three-dimensional structure simulation model of the air cooling machine cylinder part; the three-dimensional combustion simulation model is adopted for oil gas chamber optimization, heat-mechanical load verification is carried out on all parts, and the optimized heat release rate is obtained; and inputting the optimized heat release rate into a one-dimensional simulation model, and quantitatively calculating the power strengthening potential of the air cooling machine. According to the quantitative estimation method for the power strengthening potential of the air cooling machine, the power strengthening potential of the air cooling machine is quantitatively estimated through the digital simulation technology, and the strengthening design efficiency is improved.

The invention discloses a methanol-diesel dual-fuel in-cylinder direct injection engine performance optimization method, which comprises the following steps of: setting a geometric model of fuel combustion in an engine cylinder comprising a diesel nozzle and a methanol nozzle, performing grid division, and setting a sub-model required by simulation calculation; initializing a population, wherein each particle in the population is composed of a mass flow value of a diesel curve control point and a mass flow value of a methanol curve control point; generating a diesel curve and a methanol curve based on the starting point, the control point and the ending point; calculating engine power and total emission of population particles by simulation software based on a diesel curve and a methanol curve; performing weighted summation to serve as an optimization target of population particles; and iteratively updating the speed and the position of the population particles to the maximum iterative calculation step number, and obtaining an optimal diesel curve and an optimal methanol curve based on the optimal particles. According to the method, the fuel injection curves of the diesel oil and the methanol are optimized respectively, and the overall performance of the dual-fuel in-cylinder direct injection engine is improved.

The invention provides a vehicle control method and device and a vehicle. The vehicle comprises an engine with methanol fuel as power. The control method comprises the following steps: obtaining a first quality factor for representing the content of a first impurity in the methanol fuel and a second quality factor for representing the content of a second impurity in the methanol fuel; determining whether the quality of the methanol fuel is abnormal according to the first quality factor and the second quality factor; and under the condition that the methanol fuel quality is abnormal, the engine is controlled to execute an engine protection strategy. Real-time monitoring of the quality of the methanol fuel and real-time protection of the engine can be achieved, the risk of engine damage caused by the quality problem of the methanol fuel can be reduced, and therefore the safety performance of a vehicle with the methanol fuel as power is optimized.

A propulsion system for an aircraft includes a gas turbine engine and an engine power extraction system. The gas turbine engine includes a first rotational assembly. The first rotational assembly includes a propeller and a first shaft coupled to the propeller. The first shaft is configured for rotation about a rotational axis of the propulsion system. The engine power extraction system includes a fluid pump, a fluid motor, and a generator. The fluid pump is operably coupled to the first shaft. The fluid pump is in fluid communication with the fluid motor. The fluid pump is configured to pressurize and direct a hydraulic fluid to the fluid motor causing the fluid motor to rotatably drive the generator to generate an electrical power output.

The invention belongs to the technical field of piston engines, and particularly relates to a variable-volume crankcase which is integrated with a deformable and automatically-recoverable device, a variable-volume cavity is formed in the crankcase through a deformable or slidable diaphragm, and particularly, an elastic reset element is arranged in the upper surface of the device, so that the variable-volume cavity is formed in the crankcase. It is ensured that the diaphragm can stably and regularly move and reset after deforming or sliding; power for deformation or sliding of the diaphragm comes from periodical extrusion of an engine crank to the diaphragm, by correctly matching a volume change curve of the crankcase with an air distribution phase, the volume of the crankcase is enlarged during air inlet, so that negative pressure in the crankcase is increased, the volume of the crankcase is reduced during scavenging, pressure in the crankcase is increased, and the service life of the crankcase is prolonged. The technical problems of insufficient air intake, low scavenging efficiency, power attenuation and the like of a two-stroke piston engine under the low air pressure condition are solved, and a feasible solution is provided for power improvement of a small aero-engine and power recovery in a high-altitude environment.

The invention provides a composite feedforward cooperative control method and system for propulsion of a controllable-pitch propeller of a ship. The method comprises the following steps: establishing a propulsion composite model comprising a ship load inquiry function model and a controllable-pitch propeller propulsion cooperative control model; identifying ship resistance characteristics in real time through a load inquiry model, predicting main engine power and propeller rotating speed requirements at different navigational speeds, and calculating a main engine power margin; setting a host security threshold based on the maximum persistent power margin; within the allowable range of the safety threshold value, three cooperative control modes are selected and executed in a self-adaptive mode according to the navigation working condition, wherein the three cooperative control modes include the pitch-accelerator joint control mode under the constant rotating speed of a main engine, the main engine rotating speed-accelerator joint control mode under the fixed pitch of a controllable-pitch propeller and the controllable-pitch propeller rotating speed-pitch joint control mode under the constant power of the main engine. According to the invention, through feedforward prediction and multivariable cooperation, navigational speed closed-loop stable control is realized, the problems of host overload, black smoke emission, high exhaust temperature and large control fluctuation are fundamentally avoided, and fuel economy and all-condition navigation safety are improved.

The invention discloses an engine fault fusion discrimination method based on multi-information, and the method comprises the steps: a control system obtains the centroid and centroid motion parameters of a rocket through a strapdown inertial measurement unit, and obtains the angular velocity and apparent acceleration of three axes through the collection, conversion and calculation of signals; and obtaining angular acceleration information by using the angular velocity based on an extended state observer. Meanwhile, thrust is identified on line through engine installation angle information, real-time swing angle information and quality characteristic information of the rocket, and engine faults are diagnosed in real time in combination with thrust information provided by an engine power system.

The utility model discloses an alkali liquor neutralizing unit which comprises a collecting cabinet, a neutralizing cabinet and a siphon pipeline, wherein the collecting cabinet is used for collecting acidic condensate water from a host air cooler and overflow water from exhaust gas recirculation; the neutralizing cabinet is used for filling alkali liquor and neutralizing the condensate water and the overflow water; and the siphon pipeline is used for communicating the collecting cabinet with the neutralizing cabinet. According to the utility model, non-quantitative host condensate water and washing water for exhaust gas recirculation are neutralized to be neutral by alkali liquor. Due to the fact that the flow of a neutralization water source changes greatly due to different seasons and different host powers, the neutralization effect is prone to being poor, and due to the fact that the neutralization effect is required to be 8-10 in the follow-up water treatment process, the difficulty that the neutralization effect needs to be strictly controlled is large. According to the device disclosed by the utility model, an unquantitative neutralization water source is converted into a quantitative water source for neutralization, so that the amount of added alkali liquor is quantitative, and the neutralization effect is completely controlled to be pH 8-10.