61 results about "Exhaust gas recirculation" patented technology

This invention relates to the field of engine exhaust gas recirculation (EGR) technology, and discloses a heating and vaporization device and method for engine EGR condensate. The device includes a compressor with an inlet and an outlet on its outer side. An intercooler is fixedly connected to the outlet end away from the compressor. A pipe assembly is located in the middle of the intercooler, and an engine cylinder, a turbine, and a three-way catalytic converter are connected in series via the pipe assembly. An exhaust port is located on the outer side of the three-way catalytic converter. This invention heats the liquid water that precipitates and flows into the intercooler, causing it to undergo a complete phase change and convert into water vapor. The water vapor then enters the engine cylinder along with the gas mixture, blocking the path of liquid water intruding into the engine cylinder, avoiding the risk of misfire caused by liquid water, and improving the mechanical stability of engine operation.

A method for monitoring an internal combustion engine (1) of a motor vehicle having an exhaust gas recirculation circuit (8), the method being for monitoring a vacuum level in a brake assist system (3), the vacuum level of the brake assist system (3) being dependent on the prevailing vacuum in an air intake distributor (17). The method comprises at least one step of measuring (E1) the vacuum level in the brake assist system (3), a step of comparing (E2) the measured vacuum level with at least one first threshold value (NOK1), and a step of deactivating (E3) the exhaust gas recirculation in order to increase the vacuum in the air intake distributor (17).

This application provides a vehicle control method and a vehicle. The method, applied in the field of engines, includes: acquiring the vehicle's exhaust gas recirculation (EGR) rate, intake air state information, and environmental information; determining the duration of water accumulation risk and the mitigation duration in the intake system based on the EGR rate, intake air state information, and environmental information; and controlling the vehicle based on the duration of water accumulation risk and the mitigation duration. This effectively blocks the continuous accumulation of condensate in the EGR system, thus solving the problem of poor engine combustion stability caused by the instantaneous inhalation of water into the cylinder. Without sacrificing the original fuel-saving and emission-reduction performance of the EGR system, it significantly improves the vehicle's operational reliability and safety under complex conditions such as low temperature and high humidity.

This application discloses a method, device, equipment, and storage medium for controlling engine exhaust gas recirculation rate, relating to the field of vehicle control technology. The method includes: an engine management system first calculates an initial target exhaust gas recirculation rate based on the vehicle's current operating parameters, then coordinates the actuators to respond to the target torque, and during execution, monitors parameters characterizing the turbocharger's operating state in real time. When the parameters meet a preset insufficient boost margin condition, the current target exhaust gas recirculation rate is actively reduced, and the coordination and monitoring steps are re-executed based on the updated values ​​until the insufficient boost margin condition disappears or the target exhaust gas recirculation rate drops below a preset shut-off threshold. This application can ensure the engine's torque following capability and the vehicle's power and energy performance, while maximizing the fuel-saving advantages of exhaust gas recirculation and optimizing engine fuel economy.

Disclosed in the embodiments of the present disclosure are a method for determining a desired pressure ratio of a throttle valve, a method for determining a desired flow rate of a range extender, a method for calculating an exhaust gas recirculation (EGR) rate, and a method for determining the value of a target parameter of a range extender. A throttle valve is a throttle valve of a vehicle range extender, downstream of the throttle valve is in communication with a range extender body by means of an intake manifold, and the range extender body is in communication with an exhaust gas bypass valve. The method for determining a desired pressure ratio of a throttle valve comprises: acquiring a desired pressure of an intake manifold, a desired upstream pressure and an actual upstream pressure of a throttle valve, and a desired opening degree of an exhaust gas bypass valve; on the basis of the desired upstream pressure and the actual upstream pressure of the throttle valve, determining a pressure deviation; and on the basis of the desired pressure of the intake manifold, the desired opening degree of the exhaust gas bypass valve and the pressure deviation, determining a desired pressure ratio of the throttle valve. The method, apparatus and system for determining a desired pressure ratio of a throttle valve, and the vehicle provided in the embodiments of the present disclosure can ensure the operating efficiency of range extenders.

Method for controlling an internal combustion engine (10) with at least one combustion chamber (12), wherein the internal combustion engine (10) is connected on the intake side to an air supply system (20) and on the exhaust side to an exhaust system (40), wherein the exhaust system (40) is connected to the air supply system (20) via a high-pressure exhaust gas recirculation (90) and a low-pressure exhaust gas recirculation (80), comprising the following steps: - determining an ambient temperature, - determining a temperature of an exhaust aftertreatment component (50, 52) for the selective catalytic reduction of nitrogen oxides, - determining a power demand and / or a torque demand on the internal combustion engine, - determining a NOx concentration in the exhaust system (40), - temporarily enabling the low-pressure exhaust gas recirculation (80) when • the ambient temperature is below a first threshold temperature (TUS),• the power requirement and / or the torque requirement to the internal combustion engine (10) exceeds a threshold value (hp, mp), and • the conversion capability of the exhaust aftertreatment component (50, 52) for selective catalytic reduction of nitrogen oxides is below a second threshold (KNAS) or the temperature of the exhaust aftertreatment components (50, 52) for selective catalytic reduction of nitrogen oxides is below a second threshold temperature (TNAS).

This invention discloses a novel intelligent exhaust gas recirculation valve. The invention relates to the field of exhaust gas recirculation valve technology. Air pipes are connected to both the bottom of the valve body and the outlet to facilitate exhaust gas flow. Exhaust gas enters from the bottom of the valve body and passes through a water-cooling device. After being cooled by the water-cooling device, the exhaust gas flows towards the outlet and is then fed into the intake system to mix with fresh air before entering the cylinder for combustion. This achieves the subsequent goal of reducing combustion temperature and optimizing emissions. A linear motor is installed at the top of the valve body, with its output connected to a valve stem. The linear motor controls the extension and retraction of the valve stem, causing the sealing plate to fit against the bottom of the valve body, thus controlling the intake and exhaust of air. A metal sleeve is installed on the outside of the valve stem for precise positioning and guidance, ensuring smooth and stable opening and closing of the sealing plate, reducing movement deviation and radial sway, and extending the service life of the equipment.

Method for operating a hybrid vehicle (1) with a drive arrangement (7) comprising: an internal combustion engine (2) with exhaust gas recirculation (11), an electric machine (3) and a traction battery (4) wherein the internal combustion engine (2) generates an engine torque and the engine torque a drive component (M A ) and a charging component (M L ) includes, if the state of charge (SOC) of the traction battery (4) is less than an upper limit state of charge (SOC) OG ) and the electric machine (3) by means of the charging component (M L ) is driven by a generator, so that a charging current is generated to charge the drive battery (4), where the charging component (M L ) corresponding to a minimum EGR charging rate assigned to the state of charge (SOC). L ) is determined and thus the setting is based on a minimum EGR charging rate (EGR) assigned to the state of charge (SOC).L ) is controllable so that the charging component (M L ) with regard to a minimized NO X -Emission is discontinued where the charging component (M L ) is achieved via an increase in the load point, wherein the load point increase occurs in accordance with a change in at least one operating condition influencing the state of charge (SOC), wherein the load point increase is carried out from an initial operating point (B1) to a charging operating point (B2; B3), wherein the charging operating point (B2; B3) is selected such that a minimum EGR charging rate (EGR) specified for the current state of charge (SOC) is achieved. L ) is adhered to and the load point increase is terminated or limited as soon as the EGR rate available at the charging operating point exceeds this minimum EGR charging rate (EGR). L ) would fall below.

The application discloses a fault determination method and device of an EGR system. The method comprises the following steps: obtaining an ambient temperature of an exhaust gas recirculation (EGR) system of a target vehicle and an engine water temperature corresponding to the EGR system; determining whether the EGR system meets preset enabling conditions when the ambient temperature and the engine water temperature meet preset conditions; obtaining an upstream pipe pressure corresponding to an EGR valve in the EGR system and a downstream pipe pressure corresponding to the EGR valve when the EGR system meets the preset enabling conditions; and determining whether the EGR system has a fault according to the upstream pipe pressure corresponding to the EGR valve and the downstream pipe pressure corresponding to the EGR valve. The method provided in the application at least solves the technical problem that a fault determination process of an EGR system in the related art is complex, thereby reducing the fault determination efficiency.

This invention discloses an exhaust gas recirculation (EGR) intake muffler for an internal combustion engine. The muffler cylinder contains a perforated central tube and a Venturi tube. Helical blades are wound around the perforated central tube. A core guide tube is fitted onto the Venturi tube shell; a middle ring guide tube is spaced apart on the core guide tube; and an outer ring guide tube is spaced apart on the middle ring guide tube. The Venturi tube is located on the intake side of the muffler cylinder, and the perforated central tube is located on the exhaust side. The throat section of the Venturi tube connects to a recirculating exhaust gas pipe and a balancing gas pipe. The recirculating exhaust gas pipe leads to an exhaust gas return pipe via an exhaust gas balancing valve, and the balancing gas pipe leads to the balancing chamber of the exhaust gas balancing valve. The exhaust gas balancing valve includes a valve seat, a valve body, and a balancing diaphragm. The balancing diaphragm is clamped in the balancing chamber between the valve seat and the valve body. A sliding core is slidably mounted on the valve body, and a valve disc is fixedly installed on the valve body. This intake muffler not only achieves wideband noise reduction, but also enables automatic control of the intake volume of recirculated exhaust gas.

Hybrid drive system with integrated gas generation from carbon-containing solids for supplying a gas engine, comprising: • a solids storage unit, • a metering unit, • a thermal reactor module, • a gas purification unit, • a buffer volume, • a gas engine, • a charging unit, • an exhaust gas recirculation, wherein a combustible gas mixture is generated from the solids and supplied to the gas engine.

This application provides a vehicle heat exchange module, a vehicle temperature control system, and a vehicle, including at least one of a gas-cooled radiator, a first water pump, a valve, a gas cooling device, an exhaust gas recirculation system, and a cooling medium; the gas-cooled radiator is connected to the first water pump; the first water pump is connected to the valve; the first outlet of the valve is connected to the gas cooling device; the gas cooling device is connected to the exhaust gas recirculation system; the second outlet of the valve is connected to the exhaust gas recirculation system; the exhaust gas recirculation system is connected to the gas-cooled radiator; the gas cooling device is disposed around the vehicle engine; when the valve is in the state of first outlet closed and second outlet open, the cooling medium flows from the first water pump to the valve, from the valve to the exhaust gas recirculation system, from the exhaust gas recirculation system to the gas-cooled radiator, and from the gas-cooled radiator to the first water pump, thereby preventing the surrounding air from condensing into condensate and entering the engine due to excessively low temperature of the gas cooling device.

The application provides a control method of a turbocharged engine variable exhaust gas recirculation system, which comprises the following steps: obtaining an operating state parameter representing an engine operating condition; the operating state parameter is used to determine a target exhaust gas recirculation rate matched with the engine operating condition; based on the operating state parameter and the target exhaust gas recirculation rate, a plurality of control signals are generated; wherein the plurality of control signals comprise: a first control signal for controlling the conduction direction of a controllable electromagnetic three-way valve to select a target exhaust gas recirculation loop from a plurality of exhaust gas recirculation loops, a second control signal for controlling the opening degree of an exhaust gas recirculation valve to adjust the exhaust gas flow, and a third control signal for controlling the nozzle ring opening degree of a variable nozzle ring turbocharger to provide a target pressure environment for exhaust gas recirculation; and the first control signal, the second control signal and the third control signal are respectively sent to the controllable electromagnetic three-way valve, the exhaust gas recirculation valve and the variable nozzle turbocharger.

This application discloses a fuel cell gas monitoring method and system, relating to the field of fuel cells. The method includes acquiring gas state information of the fuel cell through a gas monitoring device and acquiring the actual output power of the fuel cell through a power monitoring module; configuring a normal pressure difference threshold range through a data analysis module and determining whether the actual pressure difference between the anode inlet and outlet calculated from the gas state information exceeds the normal pressure difference threshold range; when the pressure difference exceeds the normal pressure difference threshold range, determining whether the risk is controllable through a safety assessment module; when the risk is uncontrollable, executing safety protection through a safety circuit switch; when the risk is controllable, determining whether the actual output power is lower than the set power; when it is not lower than the set power, reconfiguring the normal pressure difference threshold range; when it is lower than the set power, controlling the operation of the exhaust gas recirculation device or mass flow controller through a life extension control module. This application can avoid frequent start-stop operations and extend the life of the fuel cell.

Vehicle exhaust gas recirculation (EGR) cooler, which includes the following: a housing (100) provided in a cylinder block (10) located outside a water jacket (11) of an internal combustion engine mounted in a vehicle, and which includes a cooling fluid inlet (110) and a cooling fluid outlet (120); a single or multiple gas pipes (200, 250, 260) arranged within the housing (100) and configuring an exhaust gas flow path; a pipe plate (300) containing pipe entry holes (310) into which opposite ends of the gas pipes (200, 250, 260) are inserted and attached; and a gas cover (400) coupled to the housing (100) on an outside of the tube plate (300) and comprising an exhaust inlet (410) connected to one end of the gas tube (200) and an exhaust outlet (420) connected to the other end of the gas tube (200), wherein the cooling fluid outlet (120) is provided on the gas cover (400) arranged outside the cylinder block (10) and the cooling fluid outlet (120) is formed in the vicinity of the exhaust gas outlet (420).

The utility model relates to the technical field of engine exhaust, and disclose a kind of exhaust heat management system of internal exhaust gas recirculation of natural gas engine, including engine body, the engine body is equipped with variable hydraulic valve mechanism, for producing internal exhaust gas recirculation by exhaust valve secondary opening;Aftertreatment unit is sequentially arranged with TWC, DOC, DPF and SCR along exhaust flow direction, and the upstream of TWC and SCR is equipped with urea nozzle.The utility model can accurately control exhaust valve secondary opening by full variable hydraulic valve mechanism, under medium load condition, part of exhaust gas is reintroduced into cylinder, which reduces oxygen concentration and combustion temperature in cylinder, reduces NOx original emission, and through high-temperature exhaust gas mixing to improve exhaust temperature, which lays foundation for efficient work of aftertreatment system, without external pipeline and cooler, reduces pumping loss, thereby improves engine thermal efficiency, reduces gas consumption rate, and gives consideration to emission reduction and energy saving.

This invention provides an engine, an exhaust gas recirculation method, and a vehicle. The engine includes an engine cylinder, a turbocharger, a first exhaust gas bypass, and a first opening regulating valve. The turbocharger has an exhaust gas outlet. The engine cylinder has an intake manifold on one side and an exhaust manifold on the other. The first exhaust gas bypass is connected at one end to the turbocharger via the exhaust gas outlet and at the other end to the intake manifold, for guiding exhaust gas discharged from the turbocharger into the engine cylinder. The first opening regulating valve, located on the first exhaust gas bypass, controls the flow rate of exhaust gas entering the first exhaust gas bypass. This invention allows the bypassed exhaust gas from the turbocharger to be directly introduced into the cylinder, reducing the need for bypass valves in the turbocharger. It has a simple structure, reduces the manufacturing difficulty and cost of the turbocharger, and also reduces engine fuel consumption and improves engine thermal efficiency.

This application relates to a control method, apparatus, electronic controller, storage medium, and computer program product for exhaust gas recirculation (EGR) of a vehicle engine. The method includes: acquiring the current desired flow rate and the current actual flow rate of the target gas in a target cylinder of the vehicle engine; determining the current work fraction based on the number of cylinders performing work at the current time; determining a first mapping curve corresponding to the current work fraction; determining a current open-loop control quantity based on the first mapping curve, the current desired flow rate, the current fuel injection quantity, and the current engine speed; determining a target speed based on the difference between the current actual flow rate and the current desired flow rate, and the current open-loop control quantity; and controlling the target pump in the target cylinder to operate according to the target speed to achieve exhaust gas recirculation. This allows for precise control of exhaust gas recirculation.

The use of a nitrogen containing detergent as an additive in a diesel fuel composition to reduce the impact of deposits in an exhaust gas recirculation (EGR) system and / or the post combustion system o

The utility model relates to exhaust gas recirculation valve technical field, especially in kind of self -lubricating exhaust gas recirculation valve, including valve seat, valve core, valve stem subassembly and electric control assembly, the air inlet channel and the air outlet channel that are mutually connected are equipped in valve seat, the valve core is placed in the air inlet channel and is equipped with the valve hole for the exhaust gas to enter, the valve stem subassembly includes the valve stem of the valve core, axle sleeve, valve piece, the electric control assembly drives the valve piece rotation to change the effective flow area of valve hole to realize the opening and closing of valve, the oil storage channel that stores lubricating oil is equipped in the valve stem along the axis, one end of oil storage channel is located in the valve stem, the other end orifice sets up in the end face of valve stem, the orifice is equipped with the plug of detachable connection with it, the periphery of valve stem is evenly distributed with several X -shaped grooves, the X -shaped groove is evenly distributed with several lubricating holes along the radial setting of valve stem, lubricating hole is linked together with oil storage channel, the utility model has the beneficial effects that: realize long -term self -lubricating.

The utility model provides a kind of cooler, waste gas recirculation system and engine, cooler includes cooler main body, and cooler further includes precooling structure, and precooling structure is connected with cooler main body;Precooling structure includes precooling bellows and precooling shell, precooling shell is set in precooling bellows outside and the first cooling cavity for accommodating first cooling medium is formed between two, to make first cooling medium and the gas that is passed into precooling bellows inside heat exchange;Precooling bellows is connected with cooler main body, to make the gas after heat exchange in precooling structure into cooler main body and heat exchange.The cooler of the utility model solves the problem of low reliability of cooler in the prior art.

A system includes a gas turbine system having a compressor, a combustor, and a turbine, where the gas turbine system is configured to discharge an exhaust gas. The system further includes an exhaust gas recirculation (EGR) system configured to recirculate a first portion of exhaust gas to an intake section of the gas turbine system via an EGR return. The system also includes an exhaust gas bleed (EGB) system configured to mix a second portion of exhaust gas with the first portion of exhaust gas in the EGR return downstream of an EGR cooler.

A multi-stage emissions treatment system is disclosed for non-road, medium-speed, large-displacement diesel generator applications. The system integrates an onboard in-cylinder exhaust gas recirculation system with a downstream low temperature selective catalytic reduction unit (32) that utilizes aqueous ammonia as a reductant agent. The combination enables ultra-low nitrogen oxide (NOX) emissions performance at exhaust temperatures below those required for urea-based SCR systems. The engine (24), such as Wabtec's 250 series, operates at medium speeds (300-1,200 RPM) and supports both emergency and non-emergency use cases, including compliance with EPA Tier 4 Final standards. The system provides inducement resilience by maintaining EPA Tier 4 compliance in the event of SCR failure. High torque and inertia characteristics allow the generator (34) to effectively respond to transient loads typical of artificial intelligence workloads. The invention enables the first viable use of medium-speed, large-displacement diesel engines (24) in emissions-constrained, multi-engine stationary power sites such as data centers.

An exhaust gas recirculation device and engine are provided that can reduce the number of parts, achieve miniaturization and space saving, and reduce pressure loss during EGR gas introduction. The exhaust gas recirculation device (3) includes: an exhaust pipe (26) for guiding exhaust gas; a diesel engine oxidation catalyst (261) for purifying exhaust gas; an exhaust gas return pipe (27) disposed between the diesel engine oxidation catalyst (261) and the intake system; an exhaust gas discharge pipe (29) disposed between the diesel engine oxidation catalyst (261) and the exhaust gas outlet; and a branch (32) for branching the exhaust gas passing through the diesel engine oxidation catalyst (261) to the exhaust gas return pipe (27) and the exhaust gas discharge pipe (29). The branch (32) includes: a first branch (321) disposed between the diesel engine oxidation catalyst (261) and the exhaust gas return pipe (27) for guiding exhaust gas to a position higher than the diesel engine oxidation catalyst (261); and a second branch (322) disposed between the diesel engine oxidation catalyst (261) and the exhaust gas discharge pipe (29) for guiding exhaust gas to a position lower than the diesel engine oxidation catalyst (261).

The application provides a hybrid engine carbon deposition detection method and device and a vehicle, which comprises the following steps: performing carbon deposition detection based on the current working condition point of the engine and the actual temperature difference of the exhaust gas recirculation cooler to obtain a first carbon deposition detection result; performing carbon deposition detection based on the current working condition point and the actual pressure difference of the exhaust gas recirculation cooler to obtain a second carbon deposition detection result; judging whether knock occurs in the engine, and if yes, performing carbon deposition detection based on the actual retarding angle to obtain a third carbon deposition detection result; and performing carbon deposition detection based on the first carbon deposition detection result, the second carbon deposition detection result and the third carbon deposition detection result. As a result, since carbon deposition will affect heat exchange, the temperature difference changes, the pressure difference increases due to the blockage of the air path, and the ignition is delayed due to the knock caused by the insufficient exhaust gas, the carbon deposition is judged in combination with the temperature difference, the pressure difference and the knock, the three detection methods are complementary, the missed judgment and the misjudgment are reduced, the carbon deposition detection precision of the low-pressure EGR system is improved at low cost, and the engine performance is ensured.

1. Name of the product in this design: Tester for exhaust gas recirculation valve and booster valve. 2. Purpose of this design: This design is used to test exhaust gas recirculation valves and turbocharger valves on automobiles, motorcycles and construction machinery. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a kind of exhaust gas recirculation valve vacuum actuator and support assembly equipment, comprising: bottom plate;Fixed seat, install on bottom plate, be provided with multiple positioning columns, for fixed support;Compression assembly, including a compression head, for compression vacuum actuator;Downward pressing component, including a downward pressing head, the downward pressing head moves up and down and the vacuum actuator is pressed into the support inside.The utility model has advantages that, realize the automatic press fitting of vacuum actuator and support, improve press fitting efficiency, guarantee product quality and production safety.

A computer system configured to receive temperature information (TI) indicative of an ambient air temperature of a power system comprising an internal combustion engine. The computer system is further configured to in response to determining that the TI indicates the ambient air temperature of the power system being equal to or below a threshold temperature, issue information to the power system to initiate a cold starting procedure comprising the following: controlling the throttle arrangement throttling exhaust gas from said internal combustion engine to a turbine wheel of a turbo, such that an exhaust gas counterpressure upstream the throttle arrangement is within a target exhaust gas counterpressure range, and controlling the first exhaust gas recirculation path valve such that an amount of nitrogen oxides in exhaust gases emitted from the internal combustion engine is within a target nitrogen oxides amount range.

Method comprising: under conditions during which the amount of opening of an intake throttle (62) is below a threshold amount of opening: directing intake air from an intake duct (28) to a second exhaust manifold (80) coupled to a second set of cylinder exhaust valves (6) via an exhaust gas recirculation (EGR) duct (50), including closing the intake throttle (62); heating the intake air as it passes through an EGR cooler (52) in the EGR duct (50); directing the heated intake air to an intake manifold (44) downstream of an intake throttle (62) via a flow channel (30) coupled between the second exhaust manifold (80) and the intake manifold (44); and removal of combustion gases via a first set of cylinder exhaust valves (8) to a first exhaust manifold (84) which is coupled to an exhaust channel (74).