871results about "Engine starters" patented technology

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

A gas turbine engine includes a fan drive turbine, a fan rotor, and a gear reduction driven by the fan drive turbine and, in turn, to drive the fan rotor. A main oil supply system supplies oil to components within the gear reduction, and an auxiliary oil supply system. The auxiliary oil supply system includes a rotation sensor for sensing rotation of a component that will rotate with the fan rotor, a control, an auxiliary oil pump, and a main supply sensor for sensing operation of the main oil supply system. The control is programmed to supply oil from the auxiliary oil pump to the gear reduction when the rotation sensor senses the component is rotating. A determination is made that inadequate oil is being supplied from the main oil supply system based upon information from the main supply sensor.

The invention discloses a control method for improving the cold starting performance of a methanol extended-range hybrid power system, relates to the field of engine control, and solves the technical problem that the existing methanol engine starting mode has limited effects on the thermal atmosphere of methanol atomization, premixing and methanol injection ignition success under the low-temperature condition. The method comprises the steps that an engine starting success condition is set, the real-time environment temperature is obtained, when the real-time environment temperature is larger than the preset first starting temperature, a first starting strategy is adopted to start an engine, and whether the engine is started successfully or not is judged according to the engine starting success condition. The invention further discloses a system for improving the cold start performance of the methanol extended-range hybrid power system. Methanol atomization is promoted, methanol is fully premixed, and the successful thermal atmosphere effect and success rate of a methanol injection point are improved.

A heat exchanger positioned within an annular duct of a gas turbine engine is provided. The heat exchanger extends substantially continuously along the circumferential direction and defining a heat exchanger height equal to at least 10% of a duct height. An effective transmission loss (ETL) for the heat exchanger positioned within the annular duct is between 5 decibels and 1 decibels for an operating condition of the gas turbine engine. The heat exchanger includes a heat transfer section defining an acoustic length (Li), and wherein an Operational Acoustic Reduction Ratio (OARR) is greater than or equal to 0.75 to achieve the ETL at the operating condition.

A precombustion chamber igniter with a retractable electric glow plug and a cold start control method for a methanol engine are provided. The precombustion chamber igniter includes a fuel injector, a spark plug, and an electric glow plug. The electric glow plug is retractable and has two working positions, at a first position, a heating segment is wholly located in an injection chamber to provide heat energy for the injection chamber, and at a second position, the heating segment is partially located in the injection chamber and passes through a first through hole, and the rest of the heating segment is located in a main combustion chamber of an engine, to provide heat energy for the injection chamber and the main combustion chamber. In a cold start stage of the engine, the heating segment of the electric glow plug is controlled to be located at the second position.

The utility model discloses an automobile warm air water tank capable of adapting to low temperature. The water inlet is arranged in the box body close to the bottom end of the box body, and the water inlet is communicated with the box body; the water outlet is arranged on the box body close to the top end of the box body, and the water outlet is communicated with the box body; the bottom end, close to the box body, of the heating pipeline is arranged in the box body, and the heating pipeline is partially located in the box body. By arranging the heating pipeline, when the heat of the engine is not enough to maintain the temperature of the automobile, the heating pipeline can provide heat. When the automobile does not work, the heating pipeline can maintain the temperature of the cooling liquid, and freezing of the cooling liquid due to too low temperature is avoided. The bottom end, close to the box body, of the heating pipeline is arranged in the box body, when the cooling liquid in the box body is heated, the density of the cooling liquid at the bottom is reduced and increased after the cooling liquid is heated, and therefore circulation is formed in the box body, and the cooling liquid in the box body is heated more evenly.

The invention discloses an alcohol hydrogen engine system and a control method. The engine system comprises an engine, a methanol box, a methanol pump, a methanol heater, an NH3 reforming hydrogen production device, a hydrogen-rich gas storage tank, a urea box, a urea pump and an SCR aftertreatment system. The engine nozzle is a coaxial double-channel hydrogen and methanol nozzle, injection of two kinds of fuel can be achieved through one nozzle, and flexible control over different proportions of hydrogen and methanol can be achieved in the same combustion cycle. According to the method, the mode that the NH3 urea water solution is used for online preparation of hydrogen and liquid methanol for mixed combustion is adopted, the cold start problem of the methanol engine is solved, meanwhile, engine waste heat is effectively recycled, the fuel heat value grade is improved, and then the engine heat efficiency is improved; and the combustion speed can be effectively increased by adopting hydrogen gas to assist combustion, so that the heat efficiency of the engine is improved.

The invention provides a methanol preheating and catalytic cracking system for a methanol engine, a ship and a control method, and belongs to the technical field of ship methanol engines. The problems that an existing methanol engine is difficult in cold start and methanol gasification are solved. The system comprises a methanol engine, a methanol storage tank, a water storage tank, a heat exchanger, an inlet temperature sensor and an outlet temperature sensor, one passage of a third three-way valve is connected with the waste gas output end of the methanol engine, the other passage of the third three-way valve is connected with another cooling water pipeline, and the methanol output end of the heat exchanger is connected with the methanol input end of the methanol engine. The methanol input end is connected with the methanol storage tank, a methanol pump is arranged on a methanol conveying pipeline between the methanol storage tank and the heat exchanger, two passages of the first three-way valve are arranged between the methanol conveying pipelines, and the inlet temperature sensor and the outlet temperature sensor are respectively arranged at a methanol inlet and a methanol outlet of the heat exchanger. The method is mainly used for starting the methanol engine.

The invention discloses a gas-steam combined cycle unit cold-state quick starting system which comprises a preheating air source, a generator, a gas turbine and a steam turbine, the steam turbine comprises a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder, and the preheating air source is connected with a preheating steam conveying pipeline leading to the high-pressure cylinder and the low-pressure cylinder; a steam inlet of the high-pressure cylinder is connected with a high-pressure main steam pipeline, a first electric isolating valve is arranged on the high-pressure main steam pipeline, and the high-pressure main steam pipeline is connected with a pre-heating steam conveying pipeline through a high-pressure conveying pipeline and a drain expansion pipeline; a steam exhaust port of the high-pressure cylinder communicates with an inlet of the reheater through a low-pressure reheat steam pipeline, and an outlet of the reheater communicates with a steam inlet of the medium-pressure cylinder through a high-temperature reheat steam pipeline. According to the system, the steam pre-warming of the steam cylinder is realized by utilizing the valve and the structure which are arranged in the steam turbine set, meanwhile, the water vapor loss is not caused, a new valve does not need to be arranged, the cost is saved, and the pre-warming efficiency is improved.

The invention discloses a thermal management control system for a small-displacement engine, belongs to the technical field of thermal management of engines, and solves the technical problem of overheating during operation of the existing small-displacement engine. The system comprises a cylinder body, a cylinder cover, a temperature control module, an air cooling radiator, a water pump, a preheater, an expansion water tank, an exhaust pipe water jacket, a control module, a radiator, a thermostat, an oil tank, a first control valve, a second control valve and a third control valve, a water heat exchanger is arranged in the oil tank, the cylinder body is provided with a first temperature sensor, and the cylinder cover is provided with a second temperature sensor. The thermostat is provided with a third temperature sensor, the oil tank is provided with a fourth temperature sensor, and the control module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor. The oil supply temperature management mode and the engine body temperature management mode are determined through the cylinder body temperature, the cylinder cover temperature, the cooling water temperature and the fuel oil temperature, so that the engine body of the small-displacement engine is prevented from being overheated, and the performance of the small-displacement engine is improved.

The invention relates to the technical field of vehicles, and discloses an engine intelligent layered thermal management system and method based on multivariable predictive control, and the system comprises a thermal management execution module, an information sensing module and an intelligent control module; the information sensing module is used for collecting real-time information and sending the real-time information to the intelligent control module; the information sensing module comprises a plurality of sensors and a communication interface, the plurality of sensors at least cover a temperature sensor, a pressure sensor and a flow sensor, and the communication interface is used for obtaining engine torque, rotating speed, fuel injection amount, boost pressure and vehicle speed information; the intelligent control module receives the real-time information sent by the information sensing module, performs thermal load prediction and multi-target optimization calculation to obtain an optimal control sequence, and sends the optimal control sequence to the thermal management execution module; and the thermal management execution module receives the optimal control sequence and calls an execution element to execute a thermal management action.

The invention particularly relates to a parallel combination engine starting and fuel oil supply system cross-linking structure and a control method, and the parallel combination engine starting and fuel oil supply system cross-linking structure comprises an air turbine, an aircraft accessory cartridge receiver, an engine transmission system and a stamping fuel oil pump; an air turbine shaft is connected with an aircraft accessory casing, a starting clutch is arranged between the air turbine shaft and the aircraft accessory casing, the aircraft accessory casing is connected with an engine transmission system, and the engine transmission system is connected with a turbine engine; an air turbine shaft is connected with a ramjet fuel pump, an oil supply clutch is arranged between the air turbine shaft and the ramjet fuel pump, and the ramjet fuel pump is used for The air turbine is connected with an airplane auxiliary power system through an air entraining pipeline; an auxiliary air entraining valve is arranged on the air entraining pipeline; the air turbine is connected with the turbine engine fan rear flow channel through an air entraining pipeline, and a fan air entraining valve is arranged on the air entraining pipeline. The air turbine is connected with the stamping air inlet channel through an air entraining pipeline, and a stamping air entraining valve is arranged on the air entraining pipeline.

The utility model discloses a methanol fuel supply system, a methanol engine and a vehicle, the methanol fuel supply system comprises a methanol box, a methanol filter and a methanol pump which are connected in sequence, and an outlet of the methanol pump is respectively connected with a fuel rail and an electromagnetic valve through pipelines; the fuel rail is connected with an engine methanol nozzle, and the electromagnetic valve is connected with a heater methanol nozzle; the fuel supply arrangement mode of the methanol engine and the methanol heater is reconstructed, the fuel supply arrangement mode that the heater and the engine share one set of methanol filter, a methanol pump, related pipeline connection and the like is provided, and the structure is optimized and upgraded aiming at the problem of slow pressure buildup. The related problems that an existing fuel supply system is high in cost, complex in connecting structure, low in sealing reliability, slow in pressure reduction and the like are solved.

The utility model discloses an intake preheating system of a methanol engine, the methanol engine and a vehicle, the intake preheating system comprises a methanol heater and an intake pipe, and a heated air outlet of the methanol heater is connected with an air inlet of the intake pipe through a heater throttle valve; an air outlet of the air filter is connected with an air inlet of the air inlet pipe through a throttle valve; according to the utility model, when the engine is in cold start, hot air heated by the heater is continuously input and directly enters the air inlet header pipe of the engine, so that the temperature after the hot air is mixed with fresh inlet air is increased, the air participating in ignition is hot air, and the success of low-temperature start of the methanol engine is further realized.

Disclosed in the present invention are a cryogenic fuel engine cold-start system, a control method, an apparatus, a device, a medium, and a vehicle. The cryogenic fuel engine cold-start system comprises: a cryogenic fuel engine, a cryogenic fuel tank, a master controller, a battery, and a cryogenic fuel injector. The cryogenic fuel tank is connected to a feed port of the cryogenic fuel injector; a nozzle of the cryogenic fuel injector is connected to the cryogenic fuel engine, and is used for injecting a cryogenic fuel to the cryogenic fuel engine; the cryogenic fuel engine is provided with an electric heating apparatus communicationally connected to the master controller; the battery is electrically connected to the electric heating apparatus; and the electric heating apparatus at least comprises an air channel heating apparatus. In the present invention, by means of the air channel heating apparatus arranged in an air inlet channel, a cryogenic fuel jet is boiled, thereby solving the cold-start problem of a cryogenic fuel, i.e., solving the cold-start problem of methanol, and matching an extended-range technology route. In addition, compared with the prior art that gasoline is used for heating, the present invention uses the electric heating apparatus, thereby avoiding the problems in the prior art of emission exceedance and emission aftertreatment that need to be considered when gasoline is used for heating.

Disclosed in the present invention is a methanol engine. The methanol engine comprises a methanol fuel system, a compression-ignition engine and an electronic control unit, wherein on the basis of a collected operating condition, the electronic control unit controls the methanol fuel system to inject fuel into a cylinder of the compression-ignition engine. The methanol engine is characterized by further comprising a temperature-controllable hot-surface combustion-supporting system in communication connection with the electronic control unit, wherein the hot-surface combustion-supporting system heats methanol sprayed into the cylinder and adjusts a heating temperature on the basis of the operating condition. The present invention has the advantages of performing autonomous temperature measurement and accurate temperature control, being unaffected by operating conditions and environmental changes, having a long service life, being less prone to aging, etc.; the present invention fills in the gaps of reliable ignition and running in stable operating conditions where existing methanol engines cannot use 100% of methanol fuel; moreover, 30-50% of fuel costs are reduced, and the heat efficiency reaches up to 47% or more; and the emission of a pure methanol automobile is free of soot, such that the emission of NOx is reduced by 45%. Further provided in the present invention is a control method for a methanol engine.

A method for controlling a gas turbine engine including estimating a temperature gradient between first and second portions of a spool, comparing the estimated temperature gradient with a temperature gradient threshold, if the temperature gradient is less than the threshold, driving a drive shaft in rotation at a rotational speed varying over time according to a first profile of rotational speed variation, and if the temperature gradient is greater than the threshold, controlling the electric motor to drive the drive shaft in rotation such as to vary the rotational speed of the drive-shaft according to a second profile of rotational speed variation over time so that, when the rotational speed lies within a critical interval of rotational speeds, acceleration of rotation of the drive shaft is greater than acceleration of rotation of the drive-shaft according to the first profile of rotational speed variation, within the same critical interval.

The invention relates to the technical field of generator sets, and discloses an anti-scalding heat dissipation device of a methanol generator set, the anti-scalding heat dissipation device comprises the methanol generator set and a heat dissipation box, the methanol generator set is arranged in the heat dissipation box, heat dissipation openings are formed in the periphery of the heat dissipation box, and electric shutters are installed in the four heat dissipation openings; the top of the heat dissipation box is opened and provided with a water collection tank, and water in the water collection tank is used for cooling the exhaust pipe. The methanol generator set has the advantages that a user is prevented from being scalded by exhausted high-temperature smoke when using the methanol generator set, and the use safety of the methanol generator set is improved.

The invention relates to the technical field of engine starting, and provides a cold start auxiliary system of a methanol engine, a control method of the cold start auxiliary system and related equipment. The cold start auxiliary system of the methanol engine comprises an air inlet heater which is assembled on the inner wall of an air inlet pipeline of the methanol engine and used for heating air in the air inlet pipeline; the spark plug heater is assembled on the outer wall of a spark plug of the methanol engine and used for heating the spark plug; the nozzle heater is assembled on the outer wall of a nozzle of the methanol engine and used for heating methanol fuel flowing through the nozzle; the air inlet temperature sensor is assembled on the inner wall of an air inlet pipeline of the methanol engine and is used for detecting the temperature of air in the air inlet pipeline; the control unit is in communication connection with the air inlet heater, the spark plug heater, the nozzle heater and the air inlet temperature sensor and used for controlling the air inlet heater, the spark plug heater and the nozzle heater according to the temperature of cooling liquid of the methanol engine.

The utility model provides a glow plug with strong durability, which relates to the technical field of glow plugs, and comprises a main body mechanism, the main body mechanism comprises a glow plug body, a heating tube is sleeved in the glow plug body, the heating tube is in sliding connection with the glow plug body, the outer surface of the heating tube is fixedly connected with a fixed block, and the fixed block is fixedly connected with the glow plug body. A limiting block is arranged on one side face of the fixing block. According to the electric heating plug, the main body mechanism is arranged, and the electric heating plug body and the heating tube can be separated, so that when the heating tube is damaged, the heating tube can be replaced, parts which do not need to be replaced can be continuously used, the durability of the electric heating plug is higher, and meanwhile, a part of use cost of the electric heating plug is also saved; and the guide groove is arranged, so that the heating tube can be positioned and mounted, and the fixed block can be positioned at a proper position.

The invention provides a method for controlling start of an engine of a hybrid vehicle, which comprises the following steps: detecting a cold start working condition of the engine in response to an engine start request of the hybrid vehicle; when a cold start condition of the engine is detected, heat generated by an electric driving component of the hybrid vehicle is at least partially transferred to the engine to preheat the engine, and the electric driving component is used for providing power for the hybrid vehicle through electric power. Before heat generated by an electric drive component of the hybrid vehicle is at least partially transferred to the engine, the electric drive component is placed in a predetermined operating state, and the temperature of the electric drive component is continuously monitored during warm-up of the engine. Based on the temperature of the electric driving component, the electric driving component is controlled to temporarily exit the preset operation state and enter the preset operation state again; the engine is controlled to start when the engine is warmed up such that an engine start condition is reached.

A gas turbine engine includes a fan drive turbine, a fan rotor, and a gear reduction driven by the fan drive turbine and, in turn, to drive the fan rotor. A main oil supply system supplies oil to components within the gear reduction, and an auxiliary oil supply system. The auxiliary oil supply system includes a rotation sensor for sensing rotation of a component that will rotate with the fan rotor, a control, an auxiliary oil pump, and a main supply sensor for sensing operation of the main oil supply system. The control is programmed to supply oil from the auxiliary oil pump to the gear reduction when the rotation sensor senses the component is rotating. A determination is made that inadequate oil is being supplied from the main oil supply system based upon information from the main supply sensor.

The invention discloses a methanol engine cold start method and a related device, and relates to the technical field of methanol engines, and the methanol engine cold start method comprises the following steps: controlling a fuel heater to heat air in a first channel and cooling liquid in a second channel under the condition that the environment temperature is smaller than a first temperature threshold value, the temperature of cooling liquid of the methanol engine cooling system is monitored, when the temperature of the cooling liquid reaches a second temperature threshold value, the methanol engine is started based on methanol fuel injected by the methanol injector, and if the air inlet temperature of the air inlet pipe assembly reaches a third temperature threshold value and the temperature of the cooling liquid does not reach the second temperature threshold value, the methanol engine is started. And the three-way solenoid valve is controlled to communicate with the second outlet. The air and the cooling liquid are heated at the same time through the fuel heater, the engine cooling liquid and the air inlet pipe assembly are heated at the same time in the low-temperature environment, the environment temperature around the nozzle of the methanol ejector can be rapidly increased, cold starting of the methanol engine is achieved, and the cold starting efficiency of the methanol engine is improved.

A methanol engine starting method, relating to the technical field of automobiles. The starting method is applied to a heating device. The heating device heats, by igniting methanol fuel, a methanol engine connected to the heating device. The starting method comprises: measuring the methanol engine to obtain a first engine water temperature of the methanol engine, and determining whether the first engine water temperature is less than a first temperature threshold value; if it is determined that the first engine water temperature is less than the first temperature threshold value, heating the methanol engine, and measuring the methanol engine to obtain a second engine water temperature of the methanol engine; and when the second engine water temperature is greater than or equal to a second temperature threshold value, controlling the methanol engine to inject methanol fuel to complete starting. The present application further relates to a methanol engine starting apparatus, a heating device, and a computer readable storage medium.

The invention provides a diesel generating set with an energy storage power supply, and relates to the technical field of diesel power generation. The diesel generator set with the energy storage power source comprises a monitoring heating mechanism, a power generation mechanism and a battery module, the monitoring heating mechanism is fixedly installed at the front end of the power generation mechanism, the battery module is fixedly installed at the upper end of the power generation mechanism, and the power generation mechanism comprises a support and a tail gas pipe. A first oil tank is fixedly connected to the right side of the inner upper portion of the support, and tempered glass is fixedly connected into an opening in the right end of the first oil tank. The oil tank I is used for storing No.-35 diesel oil, the oil tank II is used for storing No. 0 diesel oil, and the temperature of the No. 0 diesel oil in the oil tank II is detected to judge whether the consumption of the No.-35 diesel oil for starting and preheating is enough or not, so that the cost of using a generator to generate power outdoors at the temperature below zero in winter is saved; and the safety coefficient of the generator can be ensured.

The invention discloses a compressed air energy storage multi-stage expansion machine quick starting system and method. The compressed air energy storage multi-stage expansion machine quick starting system comprises multi-stage expansion machines which are sequentially connected in series and a main air inlet pipeline connected to the first-stage expansion machine. The main air inlet module is used for supplying and adjusting air flow to the multi-stage expansion machine in a normal operation mode; the last-stage priority starting module is used for converting a high-pressure gas source into low-pressure large-flow mixed gas flow suitable for being driven by the expansion machine in the initial starting stage, and the converted mixed gas flow bypasses the previous expansion machine and directly drives the last-stage expansion machine to rotate and accelerate; the multi-stage preheating module is used for guiding part of gas to carry out reverse-sequence preheating on the previous-stage expansion machines, reverse airflow serves as starting damping and is further used for assisting in stabilizing the rotating speed, the gas completing the preheating task is exhausted through an exhaust valve, speed increasing and reverse-sequence preheating are carried out in parallel, the starting time is greatly shortened, and the starting efficiency is improved. And the starting time of the unit from the cold state to the grid-connected condition is reduced to the minute level.

The invention provides a heat exchange structure, a methanol heater and a control method.The heat exchange structure is suitable for the methanol heater and comprises a carrier and a flow guide channel, the carrier is used for being in heat conduction connection with the inner wall of a water jacket body of the methanol heater, and the carrier communicates with a combustion chamber of the methanol heater and the flow guide channel of an exhaust pipe; the heat conduction catalyst is coated in the inner cavity of the flow guide channel and used for eliminating harmful gas in waste gas exhausted from the combustion chamber. According to the arrangement, the carrier coated with the heat conduction catalyst is used for replacing a fin structure in the related technology, it is ensured that heat exchange can be achieved between high-temperature waste gas and cooling liquid in the water jacket body, meanwhile, harmful gas in the waste gas can be treated, an after-treatment device does not need to be additionally arranged, the arrangement space of the after-treatment device is ingeniously saved, and the cost is reduced. And the integration level of the methanol heater is improved.

Provided is a control method with which, in a plant combining a GTCC and a CO2 recovery device, it is possible to supply sufficient steam to the CO2 recovery device even during start-up of the GTCC. Specifically provided is a steam supply system for supplying steam generated in a heat recovery steam generator to a CO2 recovery device that recovers CO2 from exhaust gas discharged by a power generation plant, which includes a gas turbine, the heat recovery steam generator, and a steam turbine, wherein medium-pressure steam generated in the heat recovery steam generator is supplied to the CO2 recovery device during start-up of the power generation plant.

The invention belongs to the field of methanol generators, and provides a methanol-powered small portable energy-saving generator set which comprises an upper bracket and a lower bracket, a plurality of rollers are mounted at the bottom of the lower bracket, a mounting plate is fixedly mounted on the upper bracket through a fixing rod, and a methanol engine and a generator are fixedly mounted on the mounting plate. The device does not need to be started by gasoline and is started by single fuel (methanol), the device is more environment-friendly, after the device is started for power generation, vibration generated during operation of the methanol engine is used as power, heat generated during operation of the methanol engine is extracted and temporarily stored in the heat storage assembly, and when the temperature is low, the heat storage assembly is started, so that the power generation efficiency is improved. The heat storage assembly can release heat to heat methanol in the methanol box, compared with electric heating in the prior art, the device is more energy-saving, the heat storage assembly can be recycled, a large amount of electric power can be saved, and the device is energy-saving and environment-friendly.

The invention provides a steam turbine quick starting system and method based on low-pressure rotor impulse rotation, belongs to the technical field of steam turbine operation control, and can at least partially solve the problem that the starting time of a steam turbine is long due to the fact that impulse rotation can only be achieved after sufficient cylinder warming during cold state starting in a starting mode adopted by an existing steam turbine set. The system comprises a steam turbine unit, a conveying pipeline assembly, a reheating temperature and pressure reduction system and a main steam temperature and pressure reduction system, and has the beneficial effects that the system adopts a low-pressure cylinder impulse rotation mode, a steam passage can be rapidly established through the reheating temperature and pressure reduction system and the main steam temperature and pressure reduction system at the initial stage of boiler ignition, and early impulse rotation is achieved; the cylinder warming waiting time is shortened, and the overall starting efficiency of the unit is improved.