3000results about "Combustion engines" patented technology

The invention provides an efficient and stable ship hybrid power generation system which comprises a hydrogen production unit and an ammonia supply system, and the hydrogen production unit comprises an ammonia decomposer, a hydrogen separator, a high-pressure hydrogen storage tank, a fuel cell and an ammonia-hydrogen internal combustion engine. The ammonia decomposer enables the ammonia flow to enter the ammonia decomposer in a segmented constant mode for catalytic decomposition through four set working conditions; the hydrogen separator is used for separating and purifying the generated mixed gas, and the separated and purified hydrogen is respectively fed into the fuel cell and the ammonia-hydrogen internal combustion engine through valves for power generation; the molten salt system recycles high-temperature tail gas of the ammonia-hydrogen internal combustion engine through the heat exchanger for heat energy storage and power generation through the steam Rankine cycle system. The regulation and control method is used for stabilizing the system and prolonging the service life of equipment by limiting the dynamic loading rate and start-stop times of the fuel cell and the ammonia-hydrogen internal combustion engine, and is used for waste heat recovery power generation through the molten salt and the steam expansion machine, so that the efficiency of the system is improved.

A turbocharger assembly having a turbine assembly and a compressor assembly that are coupled by a rotating shaft. The turbine assembly includes an exhaust incoming-flow duct configured to deliver exhaust gases to a turbine wheel in an annular flow-path. The turbine wheel redirects and discharges the exhaust gases in a direction that is substantially opposite to the incoming exhaust flow direction. The exhaust outgoing flow passes radially inside of the annular flow-path of the exhaust incoming-flow duct. The compressor assembly includes an air incoming-flow duct configured to deliver air to an impeller wheel. The impeller wheel compresses, redirects, and discharges the air in an annular flow-path in a direction that is substantially opposite to the incoming airflow direction. The air incoming flow passes radially inside of the annular flow-path of the air outgoing-flow duct.

A fuel reforming system for a vehicle on which a reciprocating engine is mounted is provided can comprise a decomposer to decompose hydrocarbon fuel into carbon and hydrogen gas by using heat and a pressure of combustion gas and a catalyst and to hold carbon. The decomposer can communicate with a combustion chamber via an openable / closable third port. A reforming space in which a reforming member including the catalyst is installed can be on the side of a connection portion of the decomposer with the third port. On an opposite side of interior of the connection portion of the decomposer with the third port, an additional space is provided to accommodate residual gas that remains in the third port and the decomposer when combustion gas is introduced into the decomposer through the third port.

A heat exchanger includes a fluid flow passage with a wavy fin turbulizer. The turbulizer includes sidewalls extending lengthwise along a fluid flow direction between its first and second ends, and the sidewalls are spaced apart across the width of the turbulizer. Each flow channel of the turbulizer is defined between two adjacent sidewalls. Each sidewall has a smoothly and continuously curved profile with repeating wave forms being defined along the length of the turbulizer. The continuously curved profile of the sidewalls is defined by a non-circular shape, such as elliptical, sinusoidal, parabolic and hyperbolic shapes. The radius of curvature changes constantly and reaches a maximum at or near the inflection point between adjacent crests and troughs of the profile, to provide improved particle pass-through, lower pressure drop, and enhanced plateability of internal surfaces.

The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine along with ammonia. The present invention utilizes ammonia not only as a co-fuel for the engine, but also as a heat-exchange medium used by a cooling system for the internal combustion engine, such that the heat is transferred from hot engine coolant to the ammonia, thereby cooling the engine coolant, and also pre-heating the ammonia.

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a main catalyst, a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The main catalyst is disposed downstream of the turbine and the CLOC. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller determines whether a temperature of the main catalyst is less than a threshold; commands a CLOC mode wherein the CLOC valve routes at least some exhaust to the CLOC based on the temperature being less than the threshold; determines whether a boost is requested at the engine; determines whether a full turbine input is needed to satisfy the requested boost; and disables the CLOC mode based on a determination that a full turbine input is needed.

A method for managing pressure in one or more tires installed on a vehicle includes: determining, by an electronic control unit, a pressure parameter value based on one or more measured pressures; and commanding, by the electronic control unit and based on the pressure parameter value, at least one control valve to an open position to conduct fluid from an air source and to inflate the one or more tires.

An internal combustion engine has a uniblock that defines a blind cylinder bore that terminates within the uniblock. A piston is inserted into the cylinder bore from a bottom end of the cylinder bore. Parallel first and second vertical planes extend along first and second lateral sides of the cylinder bore. A cylinder zone being defined between the first and second vertical planes. A crosshead is coupled to the piston. A first crankshaft has a first crankshaft axis that extends parallel to the first vertical plane and that is positioned outside of the cylinder zone. A second crankshaft has a second crankshaft axis that extends parallel to the second vertical plane and that is positioned outside of the cylinder zone. The first crankshaft is coupled to the crosshead with a first connecting rod and the second crankshaft is coupled to the crosshead with a second connecting rod.

The invention relates to a composite injection hydrogen internal combustion engine and an injection control method thereof, and the composite injection hydrogen internal combustion engine comprises an air inlet system, a low-pressure air inlet channel hydrogen supply system, a high-pressure in-cylinder direct injection hydrogen supply system, an ignition system and a control system, the control system dynamically adjusts the ratio of low-pressure gas inlet channel hydrogen injection to high-pressure cylinder internal direct injection hydrogen by correspondingly controlling the working states of the gas inlet system, the low-pressure gas inlet channel hydrogen supply system and the high-pressure cylinder internal direct injection hydrogen supply system, and specifically, the ratio of low-pressure gas inlet channel hydrogen injection to high-pressure cylinder internal direct injection hydrogen injection is adjusted according to the rotating speed and target power of an engine. The proportion of air inlet channel injection and in-cylinder direct injection is dynamically adjusted. Compared with the prior art, a composite double-injection mode is introduced, more accurate combustion control can be achieved, higher flexibility and adaptability are provided, the performance and combustion efficiency of the hydrogen internal combustion engine can be optimized within a wider working condition range, and the combustion stability and fuel economy of the engine are effectively improved.

The mobile hydrogen energy power generation system comprises a hydrogen engine, the output end of the hydrogen engine is connected with the input end of a power generator, and the power generator is electrically connected with a battery pack; a hydrogen inlet of the hydrogen engine is connected with a hydrogen outlet of the buffer tank through a first hydrogen supply pipe set, a hydrogen inlet of the buffer tank is connected with a hydrogen source through a second hydrogen supply pipe set, a third hydrogen supply pipe set is installed on the second hydrogen supply pipe set in a matched mode, and the end of the third hydrogen supply pipe set is connected with a gas port of the solid hydrogen storage module. The solid hydrogen storage module is filled with solid hydrogen storage materials, a fourth hydrogen supply pipe set is installed on the third hydrogen supply pipe set in a matched mode, and the end of the fourth hydrogen supply pipe set is connected with the other hydrogen inlet of the buffer tank. By arranging the solid hydrogen storage module, hydrogen can be stably supplied to the hydrogen engine, so that the generator can stably output electric energy, and the system is suitable for equipment or systems with high requirements for electric energy quality, good in safety and stability, low in overall energy consumption and low in power generation cost.

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a water-hydrogen combined supply internal combustion engine which comprises a first power generation unit driven by hydrogen and air combusted by a hydrogen internal combustion engine unit. The gas recovery unit converts water vapor in exhausted gas into liquid water through a condensation driving module and drives the second power generation unit at the same time; the fuel supply unit adjusts the hydrogen injection amount through a generated adjusting instruction based on multi-dimensional data detected by the monitoring unit and processed by the data processing unit and the confidence decision-making unit, and then generation of nitric oxide is inhibited. Condensate water recovery and combustion control of the hydrogen internal combustion engine are deeply combined, the actual exhaust humidity is reversely deduced by monitoring the flow of the condensate water, the gas detection error tolerance range is dynamically corrected, the hydrogen-oxygen combustion ratio judgment result is linked, safety amplitude limiting control over hydrogen fuel supply is achieved, and nitrogen oxide generation of the hydrogen internal combustion engine is reduced.

The invention discloses a control method, device and equipment of a hydrogen engine and a storage medium. The control method comprises the steps that the engine rotating speed and the engine torque are obtained; under the transient working condition of the engine, the operation area of the engine is determined according to the engine rotating speed and the engine torque; and controlling the driving motor, the mechanical transmission assembly or the exhaust gas turbine according to the operation area. According to the technical scheme, the engine rotating speed and the engine torque are obtained in real time, the operation area of the engine is judged, different supercharging modes are determined through the waste gas turbine, the driving motor and the mechanical transmission assembly according to the operation area of the hydrogen engine, the problem that the transient dynamic performance is poor is effectively solved, and the application range is wide. The transient dynamic performance of the hydrogen internal combustion engine is improved, and efficient cleaning application is achieved.

A combined cycle power generation and storage system is shown. A liquid air energy storage system uses excess power to liquefy air and stores it in a liquid state. A combustion engine produces power by combustion of a carbon-based fuel along with an exhaust stream containing carbon dioxide. A heat recovery system exchanges heat from the exhaust stream to air from the liquid air storage system, and thereby produce a cooled exhaust stream and heated air. An air expansion machine recovers power by expansion of heated air from the heat recovery system. A separation system separates carbon dioxide from ambient air prior to liquefaction during operation of the liquid air energy storage system, and separates carbon dioxide from the cooled exhaust stream during operation of the combustion engine prior to emission of the cooled exhaust stream to atmosphere.

The invention belongs to the technical field of clean energy, and particularly relates to an ammonia-hydrogen fusion engine system and a control method thereof.The ammonia-hydrogen fusion engine system comprises an engine, a liquid ammonia vaporization device and an ammonia reaction hydrogen production device, the engine is provided with an intake manifold and an exhaust manifold, and the exhaust manifold penetrates through the ammonia reaction hydrogen production device; the liquid ammonia vaporization device is communicated with the ammonia reaction hydrogen production device through a first pipeline and is communicated with the intake manifold through a second pipeline, and the second pipeline is communicated with the first pipeline so as to convey ammonia gas to the ammonia reaction hydrogen production device and the intake manifold respectively; and a gasoline injector is further arranged on the intake manifold, and when the water temperature of the engine is smaller than a first temperature threshold value or the temperature of a catalyst in the ammonia reaction hydrogen production device is smaller than a second temperature threshold value, the gasoline injector is used for injecting gasoline into the intake manifold so as to start the engine. The cold start problem of the engine can be solved, and the ignition reliability is improved.

The present invention discloses a fluorosilicone rubber, a fluorosilicone rubber hose and a preparation method and application thereof. The fluorosilicone rubber is prepared from the following components calculated by weight: 50 to 70 parts of fluorosilicone raw rubber; 20 to 45 parts of high temperature flame retardant silicone rubber; 30 to 40 parts of fumed silica; 0.5 to 2 parts of diisopropylbenzene peroxide; 5 to 10 parts of hydroxy silicone oil; 1 to 3 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The fluorosilicone rubber hose of the present invention has good elasticity and flexibility, convenient installation and layout, convenient maintenance, good vibration-proof effect and high reliability. The bonding strength between the hose and the silicone is good, the fatigue resistance of the hose is excellent, the raw materials of the product are easy to obtain, the cost is low, and it is conducive to large-scale production and improving market competitiveness. The combination of fluorosilicone rubber and high temperature resistant silicone saves the cost of raw materials, and can also achieve the characteristics of high temperature resistance, weather resistance, aging resistance and flame retardancy, and at the same time has a breakthrough development in technology.

The invention discloses a ventilation system of an engine, a control method of the ventilation system of the engine and a vehicle. A pressure sensor is arranged in a crankcase; the fan and the first hydrogen concentration sensor are arranged on the first branch; the adsorption part is arranged on the second branch and used for adsorbing hydrogen, one end of the first branch is suitable for being connected with a crankcase, the other end of the first branch is connected with the second branch and the third branch, the first branch selectively communicates with the second branch or the third branch, and the second branch and the third branch are connected in parallel and suitable for being connected with an intake manifold. Therefore, when the pressure in the crankcase is too large, gas in the crankcase can be pumped out through the fan, and the first branch and the second branch can be communicated to reduce the hydrogen concentration of the gas through the adsorption part, so that the probability of risks of explosion, combustion and the like caused by too much hydrogen in the crankcase can be reduced; the use safety of the engine is improved, and the extracted gas can flow back to the intake manifold, so that environmental pollution is avoided.

A system for detecting a source of a misfire for a turbulent jet ignition (TJI) engine having a first ignition device disposed in a pre-chamber of a cylinder head and a second ignition device disposed for communication with a main combustion chamber is presented. The system includes a controller that determines engine operating conditions; generates a first spark from the first ignition device at a first time; generates a second spark from the second ignition device at a second time; activates a skipfire mode based on a determination that the engine operating conditions are satisfactory, wherein in the skipfire mode, the controller generates a modified second spark at a modified second time, the modified second time being later than the second time; and determines a misfire event based on sensing ionization of gasses at the main combustion chamber subsequent to firing the first and second ignition devices.

A heat exchanger includes a fluid flow passage with a wavy fin turbulizer. The turbulizer includes sidewalls extending lengthwise along a fluid flow direction between its first and second ends, and the sidewalls are spaced apart across the width of the turbulizer. Each flow channel of the turbulizer is defined between two adjacent sidewalls. Each sidewall has a smoothly and continuously curved profile with repeating wave forms being defined along the length of the turbulizer. The continuously curved profile of the sidewalls is defined by a non-circular shape, such as elliptical, sinusoidal, parabolic and hyperbolic shapes. The radius of curvature changes constantly and reaches a maximum at or near the inflection point between adjacent crests and troughs of the profile, to provide improved particle pass-through, lower pressure drop, and enhanced plateability of internal surfaces.

The invention discloses a catalytic combustion auxiliary preheating ammonia-hydrogen engine system and an operation method, the catalytic combustion auxiliary preheating ammonia-hydrogen engine system comprises an ammonia decomposition system, a NOx decomposition system, an ammonia-hydrogen engine, a flameless combustion system, an air source and an ammonia gas source, a preheating cooling cavity rapidly heats the inner wall surface of a combustion cavity to reach the temperature required by flameless combustion; tail gas generated by combustion further preheats all parts of the ammonia decomposition system and the NOx decomposition system, the response speed in the starting stage is increased, and in the normal operation stage, high-temperature combustion tail gas generated by flameless combustion is sequentially introduced into the heating cavity and the combustion tail gas heat supply cavity to heat the ammonia decomposition cavity so as to decompose ammonia gas in the ammonia decomposition cavity into hydrogen, and the hydrogen is converted into nitrogen; and the NOx decomposition cavity is heated to decompose NOx in the tail gas of the engine into NO, the combustion-supporting mixed gas is preheated through the preheating cooling cavity and then sprayed into the combustion cavity, the combustion-supporting mixed gas is mixed with ammonia gas for flameless combustion, and flameless combustion is further assisted.

A method for mitigating preignition events in a hydrogen internal combustion engine. The method includes providing a dosing system in fluid communication with a dosing cylinder of a cylinder block of the hydrogen internal combustion engine; introducing a lubricant including a base oil, a polymer, or mixtures thereof to an intake area of the dosing cylinder via the dosing system; and initiating operating conditions for the hydrogen internal combustion engine.

The invention relates to the technical field of hydrogen engines, and particularly discloses a hydrogen engine crankcase pipeline hydrogen concentration control method, device and system.The method comprises the steps that the hydrogen concentration in a crankcase ventilation pipeline in the current period, the mixed gas flow in the crankcase ventilation pipeline and the air flow at the front end of an air inlet header pipe are obtained; then the hydrogen concentration of the rear end of the gas inlet main pipe in the current period is calculated; the hydrogen concentration of the rear end of the intake manifold in the current period is compared with a hydrogen concentration threshold value, and the actual air-fuel ratio of the hydrogen engine in the current period is calculated according to a comparison result; and when the actual air-fuel ratio of the hydrogen engine in the current period is inconsistent with the required air-fuel ratio, the flow of hydrogen sprayed by the hydrogen nozzle in the next period is adjusted, so that the actual air-fuel ratio of the hydrogen engine in the next period reaches the required air-fuel ratio. The risk that high-concentration hydrogen mixed gas explodes in the turbocharger can be eliminated, meanwhile, the air-fuel ratio of the hydrogen engine is accurately controlled, and the risks of preignition and detonation are reduced.

The invention belongs to the technical field of engine gas supply, and discloses an engine gas supply system and an EGR rate determining method.The engine gas supply system comprises an engine, a gas inlet pipe, an exhaust pipe and an EGR assembly, the engine is provided with multiple cylinders, the gas inlet pipe communicates with the gas inlet ends of the multiple cylinders, and the exhaust pipe communicates with the exhaust ends of the multiple cylinders; the EGR assembly comprises a gas storage tank, a main control valve, an EGR main pipe and a plurality of EGR branch pipes, the first end of the EGR main pipe is communicated with the exhaust pipe through the main control valve, the second end of the EGR main pipe is communicated with the gas storage tank, the gas storage tank is communicated with the gas inlet ends of the cylinders through the EGR branch pipes, and each EGR branch pipe is provided with an EGR control valve; the EGR rate determination method is applied to the engine gas supply system. According to the air supply system of the engine, it is ensured that the pressure of waste gas supplied to the air cylinders of the engine subsequently does not fluctuate, and the uniformity of the EGR rate of each air cylinder is ensured.

To provide an engine system that reduces a risk of ignition of unburned gas in a crank chamber by using a simple configuration.SOLUTION: An engine system includes: an engine having a cylinder and a piston accommodated in the cylinder; an air supply system having an air tank and a starting air line for guiding compressed air stored in the air tank into the cylinder as air for starting an engine; and a fuel gas supply system for supplying fuel gas into the cylinder. The engine further includes: a crank shaft located on the lower side of the piston to drive the piston; and a crank case that accommodates the crank shaft. The air supply system further includes an extraction line for extracting the compressed air flowing in the starting air line and guiding the compressed air to a crank chamber in the crank case.SELECTED DRAWING: Figure 1

The invention provides a comprehensive evaluation method and system for economical efficiency of an ammonia diesel dual-fuel generator, and relates to the technical field of generators, the method comprises the following steps: obtaining ammonia fuel and diesel mass flow and unit price in real time to generate fuel cost parameters, and combining a load state and power generation efficiency to construct a power generation income model; triggering a heat loss, ammonia escape and emission penalty calculation module based on the fuel cost and the power generation income to obtain a corresponding penalty value; and inputting the penalty values into an economic evaluation model for coupling calculation, generating economic benefit indexes, and feeding the economic benefit indexes back to a fuel proportioning controller for closed-loop optimization. According to the method, the operation benefit of the system is improved through multi-dimensional economic evaluation, the operation cost is reduced by 25%, ammonia escape is reduced by 50%, NOx emission is reduced by 40%, and the stability of the system is improved by 35%.

The utility model discloses a novel turbocharger which comprises a gas compressor volute, a bearing body and a turbine box. The left end and the right end of the bearing body are in sealed connection with the gas compressor volute and the turbine box correspondingly. Two full-floating bearings are arranged in the bearing body; a turbine rotating shaft is pivoted in the full-floating bearing; the upper part of the bearing body is provided with a bent oil inlet channel; an oil inlet formed in the lower end of the oil inlet channel communicates with a top opening in the left end of the lubricating oil way. An oil return cavity is formed in the lower part of a shell of the bearing body; an oil return hole is formed in the bottom of the oil return cavity; and a water cooling cavity is formed in the bearing body. The supercharger is provided with the oil return cavity and the water cooling cavity, the two ends of the water cooling cavity are connected with the water inlet and the water outlet, the internal space can be effectively utilized, the structure is more compact, the efficient heat dissipation effect can be achieved in the limited space, and the overall space of the supercharger is saved; according to the utility model, the problems of incompact structure, large volume and the like of the water-cooling row can be solved, and the effects of compact structure and small volume are achieved.

An internal combustion engine supplying gaseous fuel, in particular hydrogen, comprises, for each cylinder (1), a first intake duct (3A) and a second intake duct (3B) controlled by a first intake valve (VA) and a second intake valve (VB), respectively. In each operating cycle of the cylinder, first only the opening and closing movement of the first intake valve (VA) is activated while the second intake valve (VB) remains closed, and successively only the opening and closing movement of the second intake valve (VB) is activated while the first intake valve (VA) remains closed. According to the present invention, due to the cooling obtained during the opening of the first intake valve, gaseous fuel is directly supplied into the cylinder only from the moment after the first intake valve (VA) is closed and before the second intake valve (VB) is opened, thereby enabling regular combustion without a pre-ignition phenomenon or a tempering phenomenon.

The invention discloses an engine EGR system, a control method and a vehicle. The engine EGR system comprises a turbocharger, a first valve, an electric compressor, an intercooler, an EGR cooler and at least one air cylinder. The exhaust end of the air compression assembly is connected with the first end of the intercooler, and the second end of the intercooler is connected with the air inlet end of the air cylinder. The first end of the first valve is connected with the exhaust end of the air compression assembly, the second end of the first valve is connected with the second end of the EGR cooler, the third end of the first valve is connected with the first end of the electric air compressor, and the second end of the electric air compressor is connected with the intercooler; air enters through the air inlet end of the air compression assembly, and the first valve controls the intervention condition of the electric air compressor by adjusting the opening degree of the first valve. Air passes through the intercooler and the air cylinder to generate waste gas, and at least part of the waste gas flows into the turbine assembly and is exhausted. According to the engine EGR system provided by the invention, the intervention condition of the electric gas compressor is controlled through the action of the first valve, so that the purpose of adapting to multiple working conditions and multiple scenes is achieved.

A method for detecting a leak in a pressure vessel of a system including a plurality of pressure vessels in fluid communication with a common header comprises: reducing a fluid pressure in the common header to a first predetermined value below an operating pressure of the plurality of pressure vessels; gradually adding fluid to the common header at a first flow rate to increase the fluid pressure in the common header from the first predetermined value; monitoring, after gradually adding the fluid to the common header, the fluid pressure in the common header; and determining, based on the fluid pressure in the common header after gradually adding the fluid to the common header, a leak in at least one pressure vessel of the plurality of pressure vessels.

A method of assembling a turbocharger 10 having a vaned turbine nozzle 28 includes first forming a sub-assembly of a center housing 20, shaft 18, bearings 19, compressor wheel 14, turbine wheel 22, and vane cartridge 50. The vane cartridge 50 is held captive in attachment to the center housing 20 by an annular heat shield 80 that includes prongs 82, 84 or the like at its inner and outer peripheries for respectively engaging a first catch C1 formed on the center housing 20 and a second catch C2 formed on the nozzle ring 38 of the vane cartridge 50. The heat shield 80 forms a snap fit to the center housing 20 and nozzle ring 38, thereby connecting the cartridge 50 to the center housing 20. The whole sub-assembly is then joined to the turbine housing 24, in the process axially compressing the heat shield 80 and a spring shroud 70 for exerting an axial biasing force on the nozzle ring 38.

The utility model relates to a diesel engine and a combustion chamber thereof. The combustion chamber of the diesel engine comprises a main body, a boss part and a pit part, the boss part is arranged on one side, far away from the top surface, of the main body, and is formed by protruding towards the direction close to the top surface; the pit part is connected with the boss part, the pit part is formed by sinking in the direction away from the top face, and a necking opening is formed in the end, close to the top face, of the pit part; in the depth direction, the range of the distance H1 from the top face to the deepest point of the pit part is 0.11 D-0. 15D, in the first direction, the range of the size D1 of the necking opening is 0.49 D-0. 53D, and D is the cylinder diameter of the diesel engine. Through the arrangement of the H1 and the D1, the volume of the combustion chamber is reduced, then a high compression ratio can be obtained, high compression pressure is provided through the high compression ratio, efficient combustion under the partial load working condition can be achieved, and the combustion efficiency is guaranteed; and meanwhile, the air utilization rate can be improved, fuel and air can be fully mixed and combusted, the fuel consumption of the engine is effectively reduced, and the requirements of high performance and low emission of the diesel engine are met.