8955results about "Electrical control" patented technology

To provide a bi-fuel vehicle capable of preventing a driver from feeling bothered even in a situation where restart occurs frequently.SOLUTION: A bi-fuel vehicle is equipped with an engine 2 to which one of two types of fuel: CNG, which is gaseous fuel; and gasoline, which is liquid fuel, selected and supplied as fuel to be injected into a combustion chamber of each cylinder, and comprises an ECU 8 that controls an idling stop function that stops the engine 2 when a preset automatic stop condition is established and restarts the engine 2 when the preset restart condition is established. The ECU 8 selects gasoline as the fuel to be injected into the combustion chamber of each cylinder of the engine 2 when it is predicted that automatic stopping and restarting of the engine 2 may be repeated a predetermined number of times or more within a predetermined time.SELECTED DRAWING: Figure 1

The invention relates to the technical field of fault detection, and discloses a diesel generating set fault detection method and system based on deep learning, and the method comprises the steps: obtaining first vibration signal data, and carrying out the time-frequency decomposition, and obtaining a dynamic change feature; de-noising processing is carried out on the dynamic change features to obtain a time-frequency feature sequence; extracting a peak energy distribution data set, and calculating each frequency band entropy value to obtain a frequency band entropy value sequence; classifying the frequency band entropy sequence, determining a random fluctuation reference mode, and separating to obtain an abnormal frequency component; calculating a spectral line spacing and amplitude ratio, obtaining a spectral line feature data set, classifying the spectral line feature data set, and determining a fault classification result; obtaining current second vibration signal data, performing similarity calculation on the current second vibration signal data and a pre-established normal mode library, and outputting a fault feature vector; and verifying the fault feature vector to obtain a final fault detection result. According to the method, closed-loop diagnosis from signal acquisition to fault classification can be realized, and the fault detection precision of the diesel generating set is improved.

A valve timing control device includes: a unit for calculating a target valve timing for one of an intake valve and an exhaust valve in accordance with an operational state; a unit for detecting an actual valve timing of one of the intake valve and the exhaust valve; an actual valve timing control unit for generating a controlled variable for the VVT based on a difference between the target valve timing and the actual valve timing; a unit for learning a learning value of the controlled variable required for maintenance of the actual valve timing based on an integral correction value; and a unit for detecting a malfunction in a VVT from an amount of a shift in the actual valve timing when learning is not completed yet, and for detecting a malfunction in the VVT from the difference when learning is already completed.

The invention discloses a transmission driving control method of a bimodal integrated engine. The transmission driving control method comprises the following steps: S1, state sensing; s2, mode decision making; S3, dynamic adjustment; s4, mode switching; S5, power optimization distribution; s6, adaptive learning is carried out; and S7, fault-tolerant guarantee. The invention further discloses a bimodal integrated engine transmission system which comprises the following modules: a power input module; a transmission adjusting module; a state sensing module; an intelligent control module; and a fault-tolerant guarantee module. Parameters are dynamically adjusted through fuzzy PID control according to speed deviation, meanwhile, real-time correction is conducted in combination with a multi-mode intelligent algorithm, speed fluctuation is precisely controlled within + / -3 km / h, flight stability is guaranteed, a model prediction control and multi-mode intelligent control cooperation mechanism is adopted, an optimal power output sequence is calculated in advance, coordinated distribution is completed, and the optimal power output sequence is controlled to be within + / -3 km / h. The dynamic response speed is increased by 40%, and the high-dynamic task requirement is met.

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

A controller is configured to control an internal combustion engine. The controller is configured to perform a fuel pressure control of adjusting a fuel pressure downstream of an electromagnetic valve in a flow direction of fuel in a fuel passage to a prescribed pressure lower than a fuel pressure upstream of the electromagnetic valve by repeatedly performing opening and closing operations of the electromagnetic valve. The controller includes processing circuitry. The processing circuitry is configured to execute a process of setting opening and closing time points of the electromagnetic valve such that a valve opening period of the electromagnetic valve during execution of the fuel pressure control overlaps with a valve opening period of the fuel injection valve.

The invention relates to the technical field of ship power, in particular to a dual-fuel ship fuel switching method and device and a storage medium, and the method comprises the steps that first engine performance data and engine state data corresponding to the first engine performance data are acquired; preprocessing the first engine performance data and the engine state data; the preprocessed first engine performance data are input into a target prediction control model for switching strategy prediction, and a fuel switching strategy corresponding to the engine is obtained; inputting the engine state data into the target fault prediction model for fault prediction to obtain a switching decision; a fuel switching strategy is sent to the control module according to the switching decision, so that the control module processes the fuel switching process according to the fuel switching strategy; and second engine performance data are received, and the fuel switching strategy is adjusted according to the second engine performance data. And seamless switching or cooperative use between liquefied natural gas and diesel oil of a ship can be met.

A system includes a controller communicably coupled to a hydrogen fueled internal combustion engine. The controller includes at least one processor coupled to at least one memory device storing instructions that, when executed by the at least one processor, cause the controller to perform operations. The operations include receiving an engine shutdown request and responsive to receiving the engine shutdown request, executing an engine shutdown procedure including causing the engine to continue to rotate for at least a predetermined number of rotations or at least a predetermined time period.

The invention discloses a surge valve control method and device, electronic equipment and a vehicle, relates to the field of engines, and aims to determine whether an engine is in a target working condition representing that a supercharger is liable to have a surge phenomenon or not. And on the basis of determining that the engine is in the target working condition, according to the intensity of the change of the operation state of the engine under the target working condition, when the engine is determined to be in a relatively strong transient working condition, whether a surge valve is opened or not is determined in time in combination with the opening degree of a throttle valve. And when it is determined that the surge valve is not opened, whether the surge valve is opened or not is further determined according to the air inlet flow of the engine and the opening degree of the throttle valve. Whether the surge valve is opened or not is judged according to the target working condition, the strong transient working condition and the surge flow of the engine in sequence, the multiple working conditions and operation conditions of the engine are synthesized, the opening condition of the surge valve is more accurately determined, the situation that the surge valve is opened abnormally can be effectively reduced, and therefore the situation that power of the engine is insufficient is effectively reduced.

The invention discloses a motorcycle emission fuel injector control method, system and equipment and a storage medium, and relates to the technical field of internal combustion engine control. According to the method, the real-time temperature of the fuel injector under the unheated condition is obtained, and the preheating temperature threshold value of the fuel injector is determined based on the difference value between the real-time temperature and the target temperature; acquiring a first temperature change rate of the fuel injector in each preset time period under the condition that the fuel injector is heated by a heat source of the motorcycle according to the preset heat supply amount; the preset heat supply amount is adjusted according to the first temperature change rates, and the target heat supply amount is obtained; a heat source of the motorcycle is controlled to heat a fuel injector according to the target heat supply amount until the real-time temperature reaches the preheating temperature threshold value, and emission parameters of a motorcycle engine are monitored; and the fuel injection amount of the fuel injector is determined based on the emission parameters and the emission parameter standard, and the fuel injector is controlled to inject according to the fuel injection amount. The motorcycle engine has the effect of improving the emission performance of the motorcycle engine.

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

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.

A cooling system for vehicles and a control method thereof improves indoor heating performance and fuel efficiency by controlling a flow rate of a coolant passing through a heater core together with an EGR cooler. A coolant having an increased temperature is first supplied to the heater core side through a flow stagnancy control to rapidly increase the temperature of the coolant flowing in the heater core, thereby improving heating performance. A warm-up feature is improved through an exhaust heat recovery function by a heat exchange between the exhaust gas and the coolant in the EGR cooler, thereby improving efficiency of fuel.

The invention provides a diesel-methanol mixed fuel engine control method and system, and the method comprises the steps: obtaining real-time working condition data including the rotating speed, load and temperature parameters of an engine, and determining the optimal supply ratio of diesel to methanol under the current working condition according to the real-time working condition data in combination with a preset fuel characteristic difference model; calculating the concentration of the mixed gas of methanol and diesel oil according to the optimal supply proportion; and if the concentration of the mixed gas exceeds the preset threshold value, the injection pressure of methanol is adjusted, so that the concentration of the mixed gas returns to the target range. After the methanol injection frequency is increased, if the combustion rate is lower than the preset lower limit value, the injection direction of the methanol injector is adjusted, and the mixing uniformity is improved; and if the combustion rate is still lower than the preset lower limit value, the methanol injection opportunity is adjusted, methanol injection and diesel injection are optimally matched in time, it is ensured that the output power of the engine is stable, and meanwhile the aim of efficient and clean operation is achieved.

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

An apparatus and method for injection of a pilot fuel into an internal combustion engine includes a variety of steady state, transient and other techniques to reduce an injection quantity of the pilot fuel and / or a carbon content of the pilot fuel.

The invention discloses an automobile air flow sensor fault diagnosis method and system, and relates to the technical field of intelligent fault diagnos.The method comprises the steps that driving behavior parameters are collected in real time, and driving style feature vectors are obtained through classification of a driving behavior recognition model; theoretical air inflow is calculated based on an engine three-dimensional fluid dynamic model, and dynamic correction is carried out in combination with driving style characteristics to generate a corrected theoretical flow signal; and finally, the actually measured signal of the air flow sensor and the corrected theoretical signal are compared and analyzed, and accurate diagnosis of the fault of the air flow sensor is realized. The technical problems that an existing air flow sensor fault diagnosis method cannot depend on a static threshold value, is difficult to adapt to driving styles and working condition changes, is insufficient in accuracy and is prone to false report and missing report are solved, self-adaptive correction of the theoretical air inflow is achieved by combining driving behavior recognition and dynamic correction, and therefore the diagnosis accuracy is improved, and the fault diagnosis efficiency is improved. And false alarm and missing alarm are reduced.

A fuel pressure controller includes processing circuitry that executes a first process, a second process, and a third process as a fuel pressure reduction control. The first process includes closing both a first electromagnetic valve and a second electromagnetic valve. The second process includes adjusting the pressure of the fuel supplied to a fuel injection valve by repeatedly performing an opening and closing operation of the second electromagnetic valve. The third process includes, when the fuel pressure in a fuel pipe between the first electromagnetic valve and the second electromagnetic valve reaches a prescribed pressure, stopping the opening and closing operation of the second electromagnetic valve to maintain the second electromagnetic valve in an open state, and repeatedly performing the opening and closing operation of the first electromagnetic valve to adjust the pressure of the fuel supplied to the fuel injection valve.

To provide a control device for an internal combustion engine capable of suppressing fuel clogging in the internal combustion engine that enables a mixed combustion operation.SOLUTION: A control device is for an internal combustion engine enabling a mixed combustion operation in which both liquid fuel and gaseous fuel are set as use fuel. The internal combustion engine includes: a cylinder having a combustion chamber for burning the use fuel; an injector for injecting the liquid fuel to the combustion chamber; a liquid fuel introduction line for introducing the liquid fuel to the injector; and a gaseous fuel introduction line for introducing the gaseous fuel to the combustion chamber. The control device for the internal combustion engine includes a recovery action execution section configured to take a recovery action for recovering an actual injection amount of the liquid fuel to be injected from the injector when an output reduction amount of the internal combustion engine or a deviation of the actual injection amount of the liquid fuel in the injector from an instructed injection amount exceeds a predetermined threshold value while the internal combustion engine is being operated through the mixed combustion operation.SELECTED DRAWING: Figure 3

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 provides a control method and device of a mixed gas power generation system, equipment and a storage medium, and belongs to the technical field of new energy power generation. The method comprises the following steps: calculating the introduction rate of each target gas based on load operation data, the type of gas introduced into the gas generator set at present, the type of target gas introduced into the gas generator set after a first duration in a combustion stage and the proportion of the target gas, based on the introduction rate and the total heat per unit time of the exhaust gas output by the gas generator set after the second duration, the exhaust gas proportion used for heating each target gas is calculated, each target gas is heated based on the exhaust gas proportion, and the temperature value of the gas in the gas generator set is monitored in real time; and regulating and controlling the operation state of the mixed gas power generation system based on the temperature value. The proportion of gas input into the gas generator can be flexibly adjusted, and the energy utilization rate of the system is increased.

Embodiments of the present application disclose a fuel injection parameter adjustment method, device, equipment and storage medium. The fuel injection parameter adjustment method comprises: determining that a vehicle enters a series-parallel hybrid working condition; recording a set of initial fuel injection parameters of an engine; performing fuel injection parameter self-learning, obtaining a plurality of sets of test fuel injection parameters based on the set of initial fuel injection parameters; sequentially using the plurality of sets of test fuel injection parameters to run the engine, and calculating a plurality of test fuel consumptions of the vehicle; wherein each set of test fuel injection parameters corresponds to a test fuel consumption; the running time of each set of test fuel injection parameters is a first self-learning time; based on comparing the plurality of test fuel consumptions, determining an optimal self-learning result from the plurality of sets of test fuel injection parameters; and replacing the initial fuel injection parameters with the self-learning result.

The invention discloses a comprehensive control system and method for carbon emission of a methanol dual-fuel power ship. The method comprises the following steps: analyzing carbon emission characteristics at different moments by collecting and acquiring sensor data in real time; solving based on the constructed carbon emission optimization model in combination with a particle swarm algorithm to obtain the optimal ship navigational speed, adsorbent circulation rate and methanol fuel injection pressure corresponding to the minimum carbon emission of the methanol dual-fuel power ship; cO2 in tail gas is captured in real time through the ship carbon capture unit, the circulation rate of an adsorbent is adjusted in time according to optimization information of the ship navigation optimization control unit, the circulation efficiency of the adsorbent is calculated according to the carbon emission amount, the adsorbent is updated or replaced in time, and the comprehensive control process of the ship carbon emission is comprehensively evaluated. And comprehensive control of ship carbon emission is realized according to the comprehensive evaluation result. The problem of poor carbon emission control effect caused by insufficient cooperative control of a methanol dual-fuel power ship carbon capture device and a power system is solved.

The invention discloses a vehicle engine noise optimization method and device, equipment and a storage medium, and relates to the technical field of engine control, and the method comprises the steps: obtaining a current driving mode when a user drives a vehicle, and determining environment data and vehicle driving information during vehicle driving according to the current driving mode; a preset noise-electric quantity mapping table is inquired through the environment data and the vehicle driving information based on the current driving mode, the target engine rotating speed is obtained, a vehicle engine is controlled to operate at the target engine rotating speed, and perceptible engine noise is calculated based on the environment data and the vehicle driving data; a vehicle engine is controlled based on the perceptible engine noise to complete engine noise optimization. The engine noise is optimized by inquiring the proper engine rotating speed and taking the perceptible noise as the optimization target, and the uncomfortable experience of the engine noise under the working conditions of low speed red light and the like can be greatly reduced.

The present invention discloses a fully variable valve control method and engine system, the method comprising: obtaining a first reference signal, a second reference signal, and a current operating condition signal of the engine during engine operation; determining a target opening angle and a target closing angle of the valve based on the current operating condition signal; determining the opening and closing times of the valve based on the current operating condition signal, the first reference signal, the second reference signal, the target opening angle, and the target closing angle; obtaining the actual opening angle when the valve is open, and obtaining the actual closing angle when the valve is closed; and performing real-time corrections on the target opening angle and the target closing angle based on the relationship between the actual opening angle and the target opening angle, and the relationship between the actual closing angle and the target closing angle, so that the actual opening angle is the same as the target opening angle, and the actual closing angle is the same as the target closing angle. Using the above method, precise control of the valve angle is achieved.

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.

The invention discloses an engine misfire diagnosis method, device and equipment, a medium and a vehicle, and the method comprises the steps: when a range extender is in a normal power generation working condition, carrying out the statistics of a misfire counting value of an engine, and recording the misfire counting once when the operation state of the engine reaches a preset misfire detection state; when the misfire counting value is larger than a preset counting threshold value, the actual generated power and the required generated power of a generator are obtained; and according to the power error between the actual generated power and the required generated power in the sliding window, whether the engine has a misfire fault or not is determined, so that the accuracy and reliability of engine misfire diagnosis can be effectively improved, the situations of false alarm and missing alarm are reduced, and the reliability of engine misfire diagnosis is improved. Therefore, the running state monitoring and fault diagnosis capabilities of the engine are optimized.

An ammonia-rich combustion coupled dual-mode prechamber ammonia-fueled engine control system is provided, including an ammonia-fueled engine and an electronic control unit. The ammonia-fueled engine includes a combustion chamber, a dual-mode jet ignition device, and an ammonia injector. The dual-mode jet ignition device includes a prechamber, an air injector, and a fuel injector. When the engine operates, ammonia fuel is firstly injected into the combustion chamber by the ammonia injector to form a rich ammonia-air mixture with air in the combustion chamber. During a compression stroke of the engine, the rich ammonia-air mixture in the combustion chamber is entered into the prechamber through a jet hole. The air injector performs scavenging in the prechamber until a equivalence ratio of prechamber gas mixture is less than 1.0, and then the fuel injector injects fuel into the prechamber forming target mixture. Finally, the target mixture is ignited by the spark plug.

The invention discloses a dual-fuel engine combustion method based on internal and external cooperative injection of a methanol engine, and belongs to the field of methanol fuel engines. The combustion method is realized on the basis of combustion of a diesel / methanol dual-fuel engine with internal and external cooperative injection of a methanol engine, a combustion chamber is formed by a cylinder cover, a cylinder and a piston, an internal and external concentric needle valve oil injector and an in-cylinder direct injection methanol injector are mounted on the cylinder cover, and a methanol port injector is mounted on an intake manifold; the high-reaction-activity diesel oil adopts a double direct injection technology; the low-reactivity methanol fuel adopts an in-cylinder high-low pressure injection and port fuel injection technology, the injection pressure, the injection timing and the injection frequency of the in-cylinder methanol injector are controlled, the gas distribution phase and the valve motion law are adjusted according to the operation condition of the engine, and mixed gas concentration layering of different gradients is formed. The ratio, the injection rule and the injection timing of the diesel oil and the methanol fuel can be flexibly adjusted, and stable operation of multi-mode combustion and high-efficiency clean combustion of the engine is achieved.

A system includes: a hydrogen internal combustion engine configured to produce exhaust; an aftertreatment system in exhaust receiving communication with the hydrogen internal combustion engine, the aftertreatment system comprising a catalyst member; a sensor coupled to the aftertreatment system; and a controller configured to: receive, from the sensor, data corresponding to a characteristic of the aftertreatment system, determine, based on the characteristic, a performance value corresponding to the catalyst member, compare the performance value to a threshold, cause the hydrogen internal combustion engine to operate in a first engine operating mode when the performance value does not exceed the threshold, and cause the hydrogen internal combustion engine to operate in a second engine operating mode when the performance value exceeds the threshold.