1055 results about "Exhaust gas recirculation" patented technology

The invention provides an anti-flameout exhaust gas recirculation (EGR) system control method and device, and belongs to the field of engine control. According to a pre-calibrated and stored first corresponding relation, an inter-cooled theoretical temperature corresponding to an actual environment temperature is determined and obtained, and the cooling flow of an intercooler is correspondingly adjusted; according to the method, the actual temperature after intercooling of engine inlet air subjected to intercooling through an intercooler is made to be close to the theoretical temperature after intercooling, but a temperature difference value still exists between the theoretical temperature after intercooling and the actual temperature after intercooling, and an EGR correction coefficient corresponding to the temperature difference value and the engine load is further determined according to a pre-calibrated and stored second corresponding relation; and the EGR rate is corrected according to the EGR correction coefficient to obtain the target EGR rate, and the EGR valve is controlled according to the target EGR rate, so that engine flameout caused by condensed liquid water of the engine is avoided, and stable operation of the engine is ensured.

The invention relates to the technical field of sedimentation tanks, in particular to an EGR (exhaust gas recirculation) water treatment sedimentation tank which comprises an inclined plate sedimentation tank body, a scraping structure, a sealing structure, a driving structure, a mounting structure, a filtering structure, a drainage pipe, a water inlet pipe, a fixing plate and an inclined plate. When the scraping plate moves upwards, the driving structure drives the scraping plate and the fixing rod to slide in opposite directions, the situation that sludge is scraped to the position above the inclined plate when the scraping plate moves upwards is avoided, and the filtering structure prevents the impurities floating in clear water from being discharged along with the clear water through a water discharging pipe; the two water outlets are sealed through the sealing structure, so that clear water flow is prevented from flowing out of the two water outlets when the filtering structure is disassembled, the inclined plate and the inclined plate sedimentation tank body are conveniently and fixedly mounted through the arrangement of the mounting structure, and the mounting efficiency of the inclined plate and the inclined plate sedimentation tank body is improved.

The invention relates to the technical field of exhaust gas recirculation of engines, in particular to an engine, a vehicle and an EGR exhaust gas flow control method. The engine comprises an air cylinder, at least two exhaust manifold branches, an EGR system and a control system, the air cylinder comprises an air inlet and at least two exhaust ports, the air inlet is communicated with an air inlet manifold, the number of the exhaust manifold branches is the same as that of the exhaust ports, inlets of the exhaust manifold branches are communicated with the exhaust ports in a one-to-one correspondence mode, the EGR system comprises at least two EGR channels, and the EGR channels are communicated with the exhaust ports in a one-to-one correspondence mode. Inlets of the EGR channels communicate with the exhaust manifold branches in a one-to-one correspondence mode, an outlet of each EGR channel communicates with the intake manifold, each EGR channel is connected with the control system, and the control system is used for controlling the waste gas flow of the at least two EGR channels. According to the implementation mode, due to the fact that the opening degree of each EGR channel can be accurately controlled, the engine can achieve optimal EGR rate control under the small exhaust gas flow and the large exhaust gas flow, and therefore the fuel economy and emission consistency of the engine are improved.

The invention relates to the technical field of diesel engine power control, in particular to a control method for reducing plateau power loss of a supercharged diesel engine through EGR. The working condition point of current operation is obtained through the engine rotating speed sensor and the accelerator position sensor, the electronic control unit corrects the main injection advance angle and the rail pressure according to the current altitude, and then the opening degree of the EGR valve is calculated and controlled according to the air amount demand value and the actual air inflow measured by the PFM air flow meter. When the altitude simulation test bench performs external characteristic tests under various altitudes, the main injection advance angle, the rail pressure and the air quantity demand quantity of the diesel engine are continuously debugged by combining the rotating speed of a diesel engine supercharger, the vortex front exhaust temperature and the smoke intensity value tested by the bench, and finally the EGR opening degree value and the external characteristic oil quantity value under the altitude condition are determined. And obtaining the maximum plateau power result under the altitude condition.

An exhaust gas recirculation mixer according to certain embodiments is operable to receive a first fluid via a first fluid intake and to receive a second fluid via a second fluid intake. One of the first fluid or the second fluid comprises air, and the other of the first fluid or the second fluid comprises exhaust gas. The exhaust gas recirculation mixer generally includes a plurality of mixing passages and a plurality of multi-path nozzles. Each mixing passage includes a corresponding and respective throat. Each multi-path nozzle generally includes an outer nozzle fluidically connected to the first fluid intake, and an inner nozzle fluidically connected to the second fluid intake. The inner nozzle is nested within the outer nozzle and projects into the throat of a corresponding and respective mixing passage.

The invention discloses valve element suspension welding positioning equipment for an EGR (Exhaust Gas Recirculation) valve, and relates to the technical field of welding. According to the valve element suspension welding positioning equipment of the EGR valve, through the design of a composite mechanism, a valve element is placed on the inner side of the clamping mechanism, so that the clamping mechanism plays a role in clamping and fixing the valve element, deviation in the welding process is prevented, and the phenomena that welding points are misplaced in the welding process, the welding points are not attractive, and the welding effect is poor are avoided; the clamping range can be adjusted through the clamping mechanism, so that the application range of components is expanded, the applicability of equipment is improved, after the clamping mechanism is fixed, an electric push rod controls a butt joint mechanism to descend, the butt joint mechanism is in butt joint with the clamping mechanism to press the top of a valve element, and therefore the stability during welding is ensured; and the clamping mechanism is driven to rotate, so that uniform-speed welding is kept in the welding process, the welding quality is improved, and the welding speed and efficiency are improved.

The invention discloses a detection and calibration device and method for clamping stagnation of an EGR (Exhaust Gas Recirculation) valve, and the method comprises the steps: firstly, dismounting the EGR valve of an engine, and dismounting the EGR valve into an actuator and a valve body; the first component is installed on the original installation face, in butt joint with the valve body, of the actuator, and the distance between the plane at one end of a push rod of the actuator and the installation plane of the actuator is adjusted and fixed to any numerical value; the second component is installed on the original installation face, where the actuator is installed, of the valve body, and the distance between the end face, connected with the bowl body, of the adjusting bolt unit and the installation face of the valve body is adjusted to be equal to the distance between the plane at one end of a push rod of the actuator and the installation plane of the actuator; and then detection is carried out according to an EGR valve clamping stagnation fault test method. According to the detection and calibration device and method for clamping stagnation of the EGR valve, the EGR valve cannot be damaged in the EGR valve detection process, and clamping stagnation faults can be set randomly in the stroke of the EGR valve.

The invention relates to the technical field of engines, in particular to a dynamic adjusting method for engine exhaust gas recirculation control, which comprises the following steps: S1, collecting multi-source data in real time; s2, data preprocessing and feature extraction; s3, constructing an EGR dynamic model; s4, performing intelligent decision making and hierarchical regulation and control; s5, evaluating and feeding back the regulation and control effect in real time; through multi-source data fusion and an intelligent algorithm, millisecond response and dynamic self-adaptive adjustment of the EGR rate are achieved, the problem of lag of a traditional control strategy is solved, and the response speed and the control precision of the system are improved; according to the hierarchical regulation and control strategy based on reinforcement learning, NOx emission reduction, power performance maintenance and fuel economy improvement are considered, and performance imbalance caused by single target optimization is avoided; environmental factor data is introduced to participate in model calculation, so that the EGR system can keep the optimal working state under the conditions of different temperatures, altitudes and the like, and the technical application range is widened.

The invention relates to a method (100) for controlling a fuel cell system (200). The method (100) according to the invention has the steps of: - determining (101) a risk of frost to the fuel cell system (200) using the ambient temperature of the fuel cell system (200), and in the event of a risk of frost: - activating (103) an exhaust gas recirculation valve (225) in a cathode exhaust gas recirculation path (205) of the fuel cell system (200) in order to conduct a mass flow through the cathode exhaust gas recirculation path (205), wherein the mass flow at least partly consists of a cathode mass flow compressed by an air compressor (203, 227) of the fuel cell system (200).

According to certain embodiments, a method generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from the engine to the mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within the throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to provide a mixture of the exhaust gas and the air.

The invention relates to the technical field of vehicle exhaust gas recirculation, in particular to a double-valve-plate EGR valve and a vehicle. A first channel and a second channel are arranged in the valve seat in a spaced mode and communicate with each other, the valve rod sequentially penetrates through the first valve plate and the second valve plate, the first valve plate is used for opening or closing the first channel, the second valve plate is used for opening or closing the second channel, and the valve rod is arranged in the valve seat in a sliding mode. When the valve rod is located at the first position, the first valve plate closes the first channel, the second valve plate closes the second channel, when the valve rod is located at the second position, the first valve plate opens the first channel, the second valve plate closes the second channel, and when the valve rod is located at the third position, the first valve plate opens the first channel. The second valve plate opens the second channel. Compared with the prior art, the double-valve-plate EGR valve has the advantages that the first channel and the second channel can be selectively controlled to be opened according to different working conditions, the control precision is improved, the leakage rate is reduced, and the universality is improved.

The present invention relates to a housing for a compressor, the housing accommodating an impeller and allowing the impeller to rotate relative to the housing, comprising: a first intake passage guiding air in a first guiding direction; a second intake passage extending at least partially circumferentially along the housing and guiding exhaust gas in a second guiding direction, the second intake passage comprising an inlet section and an opposite outlet section, and the outlet section being positioned radially inward of the inlet section, a cross-sectional ratio between an inlet cross-sectional area of the inlet section and an outlet cross-sectional area of the outlet section is between 2 and 10, and at the outlet section, a first angle formed by the second guide direction and the radial direction is in the range of 45 to 90 degrees. The shell enables mixed gas formed by air and waste gas to generate circumferential speed, the erosion rate of the blades is reduced, and the impeller does not need to be coated with a coating. In addition, the invention also relates to a compressor and an exhaust gas recirculation system.

The invention discloses a method for preserving heat of a urea NaOH and Mg (OH) 2 storage cabin, and aims at a ship which is provided with an SCR (Selective Catalytic Reduction) system, an EGR (Exhaust Gas Recirculation) system, an iCER (Initial Continuous Emission Reduction) system and a desulfurization system and needs to store urea, NaOH or Mg (OH) 2. Condensed water of the air conditioning unit is collected and then introduced into the storage cabin in a gravity mode, and the condensed water generation amount and the condensed water temperature of the air conditioning unit are analyzed and calculated. On the premise that the cabin capacity meets the condition, condensate water is used for cooling the urea cabin and then discharged into the clean cabin bottom water cabin, and the cooling capacity of the condensate water is utilized to the maximum extent. In winter or in a cold area, when the air conditioning unit does not need to operate, in order to avoid too low temperature of the solution cabin, the storage cabin can be heated by using the discharged water in the clean cabin bottom water cabin before discharging, so that the storage temperature of the urea, NaOH or Mg (OH) 2 solution is ensured to be 10-35 DEG C.

An anti-clamping stagnation EGR valve with a sealing structure is characterized in that a valve rod sub-assembly is arranged in a valve body, the valve rod sub-assembly comprises a valve rod body, a valve rod channel is formed in the valve body, the valve rod body is located in the valve rod channel, a flexible protective sleeve assembly is arranged on the valve rod body, and the flexible protective sleeve assembly comprises an inner protective sleeve, a rubber sleeve body and an outer baffle; the valve rod body penetrates through the center of the inner sheath, the center of the rubber sleeve body and the center of the outer baffle, the inner sheath is connected to the inner end of the rubber sleeve body, and the outer baffle is connected to the outer end of the rubber sleeve body. The outer baffle is in interference fit with the valve rod body; a plurality of sealing bulges are formed on the rubber sleeve body; the gap between the inner wall of the valve rod channel and the valve rod body is sealed through the sealing protrusion so that particulate matter / corrosives can be prevented from penetrating through the gap. Waste gas can be prevented from leaking along the valve rod body to the maximum extent, valve body sealing is achieved, a gas channel is isolated, particulate matter or corrosives are prevented from being accumulated in a gap between the valve rod body and the guide sleeve, carbon deposition is reduced, and the service life is prolonged.

The invention relates to the technical field of vehicle supercharging control, in particular to a supercharger performance control method and device of a hybrid power system and a vehicle. The method comprises the steps that a plateau ignition angle MAP table and a plateau air inlet VVT angle MAP table of the vehicle in a high altitude mode are obtained; a plateau air inlet VVT angle MAP table is corrected, meanwhile, the knocking thrust angle condition of the hybrid power system is checked, and the maximum performance of a current supercharger is determined so as to correct the exhaust gas recirculation rate; calibration limits are generated based on at least part of detonation, preignition, the highest rotating speed of turbine hardware, the combustion center of gravity, the combustion boundary and the HCU series-parallel economic line, and comprehensive test check is conducted based on the calibration limits so that performance optimization can be conducted on the engine. Therefore, the problems that in the related technology, due to the fact that the performance and the response speed of the supercharger in the plateau area are reduced, the actual torque of an engine cannot meet the requirement of a hybrid power system, and then the series-parallel connection switching and electricity protection capacity of the vehicle is affected are solved.

An integration system for use with a turbine, the integration system including an inlet bleed heat (IBH) system, an exhaust gas recirculation (EGR) system, and a controller.

The power plant includes a gas turbine engine including a compressor and a turbine. The compressor includes a compressor outlet. The turbine exhausts a first exhaust gas stream therefrom. The heat recovery steam generator extracts heat from the first exhaust stream and discharges a second exhaust stream therefrom. The cooler cools the second exhaust gas stream defining a cooled exhaust gas stream and discharges the cooled exhaust gas stream. An exhaust gas recirculation line directs a first portion of the cooled exhaust gas stream toward the compressor. The recirculation compressor selectively pressurizes a first portion of the cooled exhaust stream for discharge to the compressor outlet.

An exhaust gas recirculation mixer according to certain embodiments includes a chamber through which a first fluid is operable to flow in a downstream direction toward a mixing passage. The chamber is fluidically connected with the mixing passage via a first nozzle, and the mixing passage extends along a longitudinal axis defining the downstream direction and an upstream direction opposite the downstream direction. The exhaust gas recirculation mixer further includes a second nozzle and a fuel nozzle. The second nozzle extends into the mixing passage and is configured to direct a second fluid toward the mixing passage. The second nozzle comprises a second nozzle outlet portion circumferentially surrounded by the first nozzle. The fuel nozzle comprises a fuel nozzle outlet portion configured to inject fuel into the chamber in a fuel injection direction, and the fuel nozzle outlet portion is positioned upstream of the first nozzle.

An internal combustion engine for a motor car has an exhaust tract which can be flowed through by exhaust gas of the internal combustion engine, a turbine wheel arranged in the exhaust tract and driven by the exhaust gas, and an exhaust gas recirculation device which has an exhaust gas recirculation conduit via which at least a part of the exhaust gas can be branched off from the exhaust tract at a branching point arranged upstream of the turbine wheel and can be recirculated to a suction tract which can be flowed through by air of the internal combustion engine and can be introduced into the suction tract at an introduction point. A compressor wheel which can be driven via electricity to compress the air flowing through the suction tract is arranged in the suction tract upstream or downstream of the introduction point.

The invention provides an engine control method and device, a computer readable storage medium and a vehicle. The method comprises the steps that under the condition that an engine is in an idling working condition, the opening degree of an exhaust gas recirculation valve of the engine and the opening degree of a throttle valve of the engine are adjusted to the corresponding preset opening degrees correspondingly; the idling working condition is the working condition of non-load operation of the engine; after the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are adjusted to the corresponding preset opening degrees correspondingly, the pressure of an intake manifold of the engine is obtained; under the condition that the pressure of the intake manifold is smaller than or equal to the pressure threshold value, the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are increased, so that the pressure of the intake manifold is larger than the pressure threshold value, and the problem that in the prior art, the engine oil consumption generated by pumping engine oil is high due to the fact that the pressure of the intake manifold is low under the engine idling working condition is solved.

The invention discloses an engine air inlet system and a vehicle. The engine air inlet system comprises a main pipe, an exhaust gas recirculation cooler, an intercooler, a valve set, two sets of exhaust gas recirculation pipelines and two sets of intercooling pipelines. The main pipe comprises a mixing pipe and a waste gas pipe, the mixing pipe communicates with an air inlet of the engine, and the waste gas pipe communicates with a waste gas opening of the engine; two ends of each exhaust gas recirculation pipeline are respectively communicated with the mixing pipe and the exhaust gas pipe; the exhaust gas recirculation cooler is arranged on any exhaust gas recirculation pipeline; one end of each intercooling pipeline is communicated with the mixing pipe; the intercooler is arranged on any intercooling pipeline; the valve group comprises two groups of first opening valves and two groups of second opening valves, the two groups of first opening valves are respectively arranged on the two groups of exhaust gas recirculation pipelines, and the two groups of second opening valves are respectively arranged on the two groups of intercooling pipelines. According to the scheme, the performance of the engine can be optimized, and the treatment strategy of fresh air inlet and waste gas can be flexibly adjusted according to different working conditions and emission requirements of the engine.

The invention provides a staged ammonia-assisted combustor adopting exhaust gas recirculation preheating, which belongs to the field of combustors, and comprises a reaction gas pipeline, an exhaust gas pipeline, a combustion pipeline, a secondary air pipeline, a swirler, an air distributor, an igniter and a flame arrester, an air distributor is installed at the junction of the reaction gas pipeline and the secondary air pipeline, flame arresters and igniters are installed on the front portion and the rear portion of an inlet of the combustion pipeline respectively, and flame arresters are installed at the two ends of an outlet of the secondary air pipeline respectively; after being preheated by exhaust gas recirculation, a small part of reaction gas is fed into the combustion pipeline by the air distributor and is ignited by the igniter to form stable stagnant flames, and a large amount of mixed gas from the secondary air pipeline is ignited. The device is used for solving the problem that stable ignition and combustion of ammonia are difficult, meanwhile, the device is simple in structure, easy to manufacture and high in component adaptability, and energy utilization of the ammonia is promoted.

A method according to certain embodiments generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from an engine to a mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within a throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to thereby provide a mixture of exhaust gas and air.

The invention discloses a gas inlet channel liquid ammonia injection and waste gas circulation heat recovery system and method, and relates to the technical field of multi-fuel engine systems.The gas inlet channel liquid ammonia injection and waste gas circulation heat recovery system comprises a liquid ammonia storage tank, a liquid ammonia pressure stabilizing supply system, a liquid ammonia nozzle, a mixing heat exchanger, a waste gas recirculation system and a controller; the controller is used for calculating the liquid ammonia injection amount required in real time according to the real-time working condition information of the engine, controlling the liquid ammonia nozzle to work in real time, and calculating the real-time required heat for gasifying the liquid ammonia and heating the liquid ammonia to the set temperature according to the liquid ammonia injection amount required in real time; the real-time needed waste gas amount is calculated according to the real-time needed heat of liquid ammonia gasification and temperature rising to the set temperature, and the controller controls the waste gas recirculation system in real time according to the real-time needed waste gas amount to enable the needed waste gas to flow back to the mixing heat exchanger. The system stability of the engine can be improved, the efficiency of the engine is improved, and pollutant emission is reduced.

The present invention discloses a thermal management system and a vehicle having the same, the thermal management system comprising: an engine cooler, the engine cooler having a liquid inlet and a liquid outlet; an exhaust gas recirculation system cooler, one end of the exhaust gas recirculation system cooler is connected to the liquid inlet and the other end is connected to the liquid outlet, the exhaust gas recirculation system cooler is connected in series with the engine cooler; a thermostat and a radiator, the thermostat and the radiator are connected in series and in parallel with the exhaust gas recirculation system cooler, the thermostat is connected to the liquid inlet and the radiator is connected to the liquid outlet. The thermal management system according to the embodiment of the present invention has the advantages of low energy consumption, low engine fuel consumption and fast warm-up rate.

A method according to certain embodiments generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from an engine to a mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within a throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to thereby provide a mixture of exhaust gas and air.

The utility model provides an exhaust gas recirculation intercooling pipeline structure, a system, a range extender and a vehicle, the exhaust gas recirculation intercooling pipeline structure is arranged between an exhaust gas turbine and an intake manifold, and comprises a main pipeline, an exhaust gas recirculation intercooling pipeline, an exhaust gas recirculation intercooling pipeline, an exhaust gas recirculation intercooling pipeline and an exhaust gas recirculation intercooling pipeline, the two ends of the bypass pipeline are communicated with the main pipeline; in the height direction, the central axis of the main pipeline is higher than that of the bypass pipeline; gas output by the exhaust gas turbine enters the intake manifold through the main pipeline and the bypass pipeline. By the adoption of the design of the double-communication pipelines, gas can pass through the main pipeline and the bypass channel, the performance requirement of the range extender can be met, the influence on the performance of the range extender is avoided, meanwhile, due to the fact that the bypass pipeline is lower than the main pipeline, gas containing water vapor can pass through the bypass pipeline and settle in the bypass pipeline, and therefore the range extender is protected. Therefore, water vapor in the gas can be collected through the bypass pipeline, a large amount of water vapor is prevented from being brought into the air cylinder by the gas, and the fire phenomenon of the range extender is avoided.

The invention discloses a control method, device and equipment for a warm air water pump of a hybrid electric vehicle and a storage medium, and is characterized in that the control method comprises the following steps: under the condition that an engine cooling request of a vehicle engine is detected, acquiring an engine running state and a first engine basic parameter of the vehicle engine, the first duty ratio of the warm air water pump is determined according to the engine operation state and the engine basic parameters; under the condition that a gas cooling request of the exhaust gas recirculation system is detected, second engine basic parameters of the vehicle engine and gas parameters of the exhaust gas recirculation valve are obtained, and a second duty ratio of the warm air water pump is determined according to the engine running state and the gas parameters of the exhaust gas recirculation valve; under the condition that a heating request instruction of a vehicle heating system is detected, a third duty ratio of a warm air water pump is determined according to the heating request instruction; and the target duty ratio of the warm air water pump is determined according to the first duty ratio, the second duty ratio and the third duty ratio. And the safety and the reliability of the hybrid vehicle are improved.

A thermal management system includes an engine cooler, an exhaust gas recirculation system cooler, and a temperature adjustment and heat dissipation assembly. The engine cooler includes a liquid inlet and a liquid outlet. An outlet of the exhaust gas recirculation system cooler is in communication with the liquid inlet, and an inlet of the exhaust gas recirculation system cooler is in communication with the liquid outlet. An inlet of the temperature adjustment and heat dissipation assembly is in communication with the inlet of the exhaust gas recirculation system cooler, and an outlet of the temperature adjustment and heat dissipation assembly is in communication with the outlet of the exhaust gas recirculation system cooler.