641results about "Automatic control" patented technology

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 an automobile power system using hydrazine and compatible with various liquid fuels. The system comprises a fuel storage subsystem, an oil tank self-repairing subsystem, a fuel conveying subsystem, an oil injection heating subsystem, a fuel combustion subsystem, a piston kinetic energy conversion subsystem, a mechanical-electric energy conversion subsystem, an inversion conversion subsystem, a super capacitor subsystem, a multi-pole variable motor subsystem, an in-vehicle air conditioner subsystem and a foaming tire subsystem. The control subsystem, the mechanical lubrication subsystem, the braking energy recovery subsystem, the waste gas treatment subsystem, the waste heat recovery subsystem, the safety protection subsystem and the parking subsystem are used for forming a complete oil-electricity hybrid automobile system; the efficient, safe, comfortable, environment-friendly and intelligent automobile power system is innovatively constructed, so that the requirements of various vehicle power systems are met.

A pre-ignition prevention system for a turbulent jet ignition (TJI) engine having dual spark plugs includes an ion sensing system and a controller configured to receive the ion sense signal from the ion sensing system, detect, using the ion sense signal, a misfire event where a firing of a first spark plug fails to completely combust a fuel / air pre-charge in a pre-chamber of a cylinder of the TJI engine, in response to detecting the misfire event, detect, using the ion sense signal, an exhaust stroke heat release event after a firing of the second spark plug indicative of a remaining portion of a primary fuel / air charge in the main chamber and, in response to detecting the exhaust stroke heat release event, adjust fueling for at least one subsequent combustion cycle to prevent pre-ignition of the remaining portion of the primary fuel / air charge in the main chamber.

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

The invention relates to the technical field of engine control, in particular to an engine combustion control method, device and system based on double oil sprayers and a computer program product. Comprising the steps that when an engine enters a lean-burn working condition and meets a self-learning condition, self-learning of the injection starting angle and the excess air coefficient of an auxiliary oil injector is conducted; ignition advance angle self-learning of the auxiliary fuel injector is carried out; and fuel injection control over the auxiliary fuel injector is conducted on the basis of the injection starting angle, the excess air coefficient and the ignition advance angle obtained through self-learning. And when refined fuel oil control is carried out to achieve the optimal fuel consumption of the engine, the lowest NOx emission requirement under the lean-burn working condition of the engine is met.

The embodiment of the invention provides an engine control method and device, a vehicle and a storage medium, and the method comprises the steps that the running state of the vehicle is monitored, a state monitoring result is obtained, and the state monitoring result is used for representing whether the knocking phenomenon occurs in the current running state of the vehicle or not; in response to the state monitoring result that the knocking phenomenon occurs in the current running state of the vehicle, the fuel quality of fuel currently used by the vehicle, the current running parameters and running state parameters of an engine and a first control parameter are obtained, the fuel quality is used for reflecting the combustion capacity of the fuel in multiple dimensions, and the fuel quality is used for reflecting the combustion capacity of the fuel in multiple dimensions; the running state parameters are used for reflecting running conditions of the engine; adjusting a first control parameter currently used by the engine based on the fuel oil quality and the operation parameter operation state parameter to obtain a target control parameter; and controlling the engine to operate based on the target control parameter. The technical problem that in the related technology, the stability of controlling operation of the engine is poor is solved.

To provide a start control device capable of securing excellent startability even when ethanol concentration in fuel is high and an intake air temperature and a temperature of an internal combustion engine are low.SOLUTION: A start control device (30) applied to an internal combustion engine (E) driven by combustion of fuel containing ethanol includes: ethanol concentration determination means (31) for determining ethanol concentration in the fuel; and ignition timing change means (33) for changing ignition timing when starting the internal combustion engine (E) according to the ethanol concentration, wherein if the ethanol concentration determination means (31) determines that the ethanol concentration exceeds a threshold value when starting the internal combustion engine (E), the ignition timing change means (33) executes 360° ignition, which executes ignition every 360° of rotation of a crankshaft (3) of the internal combustion engine (E) until the internal combustion engine (E) starts.SELECTED DRAWING: Figure 3

A vehicle control method, comprising: acquiring the current torque and demand torque of an engine, wherein the current torque and the demand torque are the torque for driving a vehicle; when the demand torque is less than the current torque, determining the magnitude relationship between the demand torque and a preset threshold, and / or determining the magnitude relationship between a torque decline slope and a torque slope threshold, wherein the torque slope threshold is a minimum torque slope that can be achieved by the engine at the current rotational speed by reducing an intake air volume; and when the demand torque is less than the preset threshold or the torque decline slope is less than the torque slope threshold, determining an ignition retard angle. The method can avoid the problem of unexpected acceleration or jerking that is prone to occurrence when the demand torque of an engine drops rapidly, so that the smoothness of a vehicle is enhanced, thereby improving driving experience. Also disclosed are a vehicle control apparatus, a vehicle, and a computer-readable storage medium.

The invention discloses an engine multi-vehicle-type adaptive NVH quality optimization method and system, and belongs to the technical field of automobile engine debugge.The method comprises the steps that after an engine is installed on a to-be-adapted vehicle, vehicle working condition data are collected in real time, the vehicle working condition data comprises a vehicle speed, an accelerator opening degree, an engine rotating speed, a gear, a hydraulic torque converter locking state and an engine oil temperature signal; the vehicle working condition data is compared with the working condition of the engine noise sensitive working condition, and whether the engine noise sensitive working condition is entered or not is recognized; when the engine has the noise sensitive working condition, an NVH control strategy embedded in an engine electronic control unit is activated; the NVH control strategy comprises adjustment of an engine ignition angle and oil injection parameters; the engine is controlled according to the ignition angle optimization control instruction and the oil injection parameter optimization instruction; and when the vehicle runs out of the working condition of the noise sensitive working condition of the engine or gear shifting is completed, the conventional combustion control logic is recovered. And the rising rate of the pressure in the cylinder is effectively reduced, so that the structural knocking noise within the range of 150-600Hz is inhibited.

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 combustion system based on methanol fuel, and belongs to the technical field of engines, and the system is characterized in that a first outlet of a methanol storage tank is communicated to a gas inlet channel methanol nozzle of a main combustion chamber; a second outlet of the methanol storage tank is communicated to a first inlet of the waste gas heat exchanger, and is communicated to a first inlet of the methanol reformer through a first outlet of the waste gas heat exchanger; a first outlet of the methanol reformer is communicated to a gas inlet channel reformed gas nozzle of the main combustion chamber and a pre-combustion chamber reformed gas nozzle; an exhaust pipe outlet of the main combustion chamber communicates with a second inlet of the waste gas heat exchanger so as to communicate with a second inlet of the methanol reformer through a second outlet of the waste gas heat exchanger. Waste gas waste heat is used for methanol vaporization and reforming reaction, hydrogen-rich reformed gas is generated, the waste gas waste heat is efficiently utilized, the energy utilization rate is increased, the reformed gas is introduced into the pre-combustion chamber and the main combustion chamber, jet flow ignition energy is enhanced, in-cylinder combustion is accelerated, and the combustion efficiency is improved.

To provide an engine control device suppressing progression of deterioration of a catalyst.SOLUTION: An engine control device includes: a reference temperature calculation part calculating a reference temperature of a catalyst; a delay angle amount calculation part calculating a delay angle amount of a requested ignition timing when a delay angle request is issued; a rise temperature calculation part calculating a rise temperature of the catalyst assumed when making the ignition timing delay angle with the calculated delay angle amount; a temperature calculation part for determining excessive temperature rise calculating excessive temperature rise of the catalyst used for determination whether or not the temperature of the catalyst excessively rises, on the basis of the reference temperature and the risen temperature; a prediction part predicting whether or not the temperature of the catalyst excessively rises on the basis of a temperature for determination of excessively risen temperature; an increase amount calculation part calculating an increase amount of fuel jetting for suppressing temperature rise of the catalyst due to delay angle of the ignition timing in the delay angle amount without depending on a clank angle just after delay angle request; and a control part executing fuel jetting with a fuel jetting amount reflecting the increase amount, and executing ignition to an air fuel mixture at the ignition timing reflecting the delay angle amount.SELECTED DRAWING: Figure 2

The invention provides a pre-combustion chamber jet ignition device for broadening the lean burn limit of a methanol engine based on a flow baffle, which comprises a pre-combustion chamber shell, a fuel injector body, a spark plug body and the flow baffle, and is characterized in that the upper part of the pre-combustion chamber shell is provided with a fuel injector mounting groove for mounting the fuel injector body and a spark plug mounting groove for mounting the spark plug body; a primary jet flow cavity is formed in the middle, and a secondary jet flow cavity is formed in the lower part; a jet hole is formed in the bottom end of the second-stage jet cavity and communicates with a main combustion chamber of the engine. The combustor is used for spraying high-energy flames to the main combustion chamber so as to ignite combustible mixed gas in the main combustion chamber; the flow baffle is mounted at the internal joint of the first-stage jet flow cavity and the second-stage jet flow cavity; the pre-combustion chamber shell is fixed to an engine cylinder cover through a pressing plate and bolts. The energy of combustion flames generated by the pre-combustion chamber is improved, the injection duration is prolonged, the methanol lean-burn limit is finally widened, and the cold start problem of a methanol engine can be solved.

The invention provides a motorcycle ignition auxiliary system which comprises a high-energy ignition module, an intelligent ignition time control module, a high-reliability electronic element module, a strong anti-interference module, an intelligent integration and communication module, a compatibility adaptation module and a fault diagnosis and early warning module. Through close cooperative work of all the modules, the ignition performance and reliability are remarkably improved, the ignition time and energy can be accurately controlled, the system adapts to various working conditions and environments, the anti-interference capacity is enhanced, intelligent data interaction and decision making are achieved, all kinds of added equipment are effectively compatible, faults are accurately diagnosed and early warned, and remote maintenance is supported; the power performance, the economical efficiency, the stability, the intelligent level, the use convenience and the safety of the motorcycle are greatly improved, a solid guarantee is provided for high-performance operation and personalized modification of the motorcycle, the technological development of modern motorcycles and multiple requirements of users are met, and the technological progress and the product upgrading of the motorcycle industry are powerfully promoted.

To make oil surely interpose between a rotor housing and a rotor even in cold starting.SOLUTION: An engine system 12 comprises: a rotary engine 14 having a rotor housing 16, side housings 18, and a rotor 20 that is housed in a rotor accommodation chamber surrounded by the rotor housing and the side housings and forms three working chambers 24, in which the rotary engine is driven by a starter generator 10 at the time of starting to increase in rotation speed, and drives the starter generator during operation; a water temperature sensor 64 for detecting a cooling water temperature of the rotary engine; and a PCM 84 and an SGCM 86, which are configured to control rotation speed of the starter generator at the time of engine starting. The PCM 84 and the SGCM 86 control the starter generator such that when the cooling water temperature at the time of rotary engine starting is relatively low, the rate of increase in engine rotation speed becomes low as compared with that when the cooling water temperature is relatively high.SELECTED DRAWING: Figure 7

The disclosure is directed to an ignition circuit for a combustion engine. The combustion engine has a piston movable between a top dead center and a bottom dead center and, via a connecting rod, drives a crankshaft. Combustion air is apportioned via an intake channel. A control circuit provides an ignition time for the idling situation and an ignition time for the acceleration situation. To adjust an early switch to an ignition time for the acceleration situation, provision is made to monitor the rotational speed of the crankshaft over a crankshaft angle range and to detect the value of a drop in rotational speed. The value of the detected drop in rotational speed is compared to a predetermined value of a drop in rotational speed and, when the predetermined value of the drop in rotational speed is exceeded, a switch is made to the ignition time for the acceleration situation.

The invention provides a two-stroke piston engine integrated controller with high-reliability position estimation, which is characterized in that a motor Hall signal acquisition function is added on the basis of an engine crankshaft position signal acquisition circuit of a conventional engine control module. A crankshaft position signal redundancy switching logic of the two-stroke piston engine is designed based on an improved circuit, a groove pole position behind a top dead center is positioned in the operation process of the engine, synchronous correction of a Hall signal and a crankshaft position signal is achieved, and a conversion relation between a motor Hall signal and the crankshaft position signal of the engine is established. When the crankshaft position signal is abnormal, the engine timing control method based on the motor Hall signal can be automatically switched. According to the invention, the redundancy switching of the position signal of the two-stroke piston engine can be realized, so that the piston engine can still complete a set task without flameout when the crankshaft position signal is abnormal, and the reliability of a control system is greatly improved.

In certain embodiments, a significant improvement in H2-ICE performance can be achieved by a combination of active scavenging pre-combustion chamber technology and predictive model-based spark control to overcome the drawbacks of known combustion technologies. In certain embodiments, advanced combustion modeling and simulation of the ignition process, including spark events, arc movement and elongation, and resulting flame propagation, can be used to predict the relationship between spark energy / output, flow within the electrode gap, and flame growth (SOC) for different engines, different spark plugs, and various conditions. This information can be used to adjust the spark energy / output characteristics during the spark event of the same cycle in order to minimize SOC variations and significantly reduce the tendency of combustion anomalies such as backfire, knocking, and pre-ignition that prevent the achievement of high engine output density and efficiency.

An apparatus and method for operating an engine. The apparatus includes a crankshaft trigger wheel coupled to a crankshaft and a set of sensors equipped to generate a crankshaft signal associated with an instantaneous speed of the crankshaft trigger wheel. A controller is configured to receive the crankshaft signal corresponding to the instantaneous speed, determine a minimum instantaneous speed for the crankshaft trigger wheel to overcome a top dead center (TDC), and predict a reverse rotation event for the engine when the instantaneous speed falls below the minimum instantaneous speed. After making the prediction, ignition of the engine is prevented prior to the reverse rotation event occurring.

To make three of generation of negative pressure for a brake booster, ignition timing retard for warming up a catalyst, and securing of torque for maintaining idle operation coexist to the maximum.SOLUTION: An engine required torque to be generated for maintaining an idle operation is calculated (S1), a net target air amount required for the engine required torque is calculated when an ignition timing is MBT (S2), a required ignition timing retard amount required for warming up a three way catalytic converter is determined (S3), a retard target air amount required for realizing the engine required torque under an ignition timing according to the required ignition timing retard amount is calculated (S4, S5), and an upper limit differential pressure securing target air amount required for securing a negative pressure is calculated (S6). The retard target air amount and the differential pressure securing target air amount are compared with each other (S7), and when the retard target air amount is equal to or less than the differential pressure securing target air amount, the throttle valve is controlled according to the retard target air amount, and the ignition timing retard according to the required ignition timing retard amount is performed (S8 to 10).SELECTED DRAWING: Figure 2

The present invention discloses a control method, device, equipment and medium for a natural gas engine. The method comprises: obtaining operating parameters of the engine, and determining an optimal range of an intercooler temperature of the engine according to the operating conditions corresponding to the operating parameters; adjusting the intercooler temperature of the engine to an intercooler temperature lower limit value corresponding to the optimal range of the intercooler temperature by controlling the rotation speed of a fan when no detonation occurs in the engine; adjusting the ignition angle and the EGR rate of the engine to a first ignition angle and a first EGR rate, respectively, based on a first preset curve and the lower limit value of the intercooler temperature, and controlling the engine to operate at the first ignition angle and the first EGR rate so that the engine operates with minimum gas consumption, and returning to the step of obtaining the operating parameters of the engine; in such operation, the combustion efficiency of the engine can be improved, and the economy is good.

Provided is an engine control device that suppresses the occurrence of a torque shock at the time of resuming from a fuel cut and suppresses deterioration of a combustion state. A control device for an engine mounted on a vehicle, the control device being provided with: an acquisition unit that acquires an engine speed and atmospheric pressure when there is a request to restore from a fuel cut; a recovery control unit that delays the ignition timing at the time of recovering from the fuel cut from the MBT ignition timing by a predetermined retardation amount and executes a recovery process for recovering from the fuel cut; and a retardation amount control unit that reduces the retardation amount as the engine rotation speed is higher, and increases the retardation amount as the atmospheric pressure is lower. The retardation amount control unit increases a reduction rate, which is a reduction amount of the retardation amount with respect to an increase in the engine rotation speed, as the atmospheric pressure is lower.

A control system for an internal combustion engine includes at least one sensor configured to measure a combustion signal within at least one cylinder of a plurality of cylinders within the internal combustion engine. The combustion signal corresponds to a first combustion cycle. The control system also includes a controller operably connected to the at least one sensor. The controller is configured to receive the combustion signal from the at least one sensor and determine whether the measured combustion signal satisfies at least one condition associated with the internal combustion engine. The at least one condition corresponds to the at least one of engine misfire or delayed combustion. The controller is further configured to, based on the determination, reduce a fueling amount to the at least one cylinder for a predetermined number of combustion cycles following the first combustion cycle.

A system for controlling exhaust emissions from an internal combustion engine (10), the system comprising: a catalyst device (31) for purifying exhaust gas from the internal combustion engine; Means (S103) for determining that the catalyst device is in a lean state; characterized by Means (S106 etc.) for suppressing an amount of NO x contained in the exhaust emission from the internal combustion engine, wherein the suppression means is actuated when the determining means determines that the catalyst device (31) is in the lean state and when the internal combustion engine (10) is operated at a load higher than a predetermined level, wherein the suppression means (S106, etc.) determines an amount of NO x -Suppression according to a driving speed (SPD) of the vehicle on which the internal combustion engine is mounted.

The present invention discloses a vehicle and its engine starting control method, device and crankshaft revolution acquisition method. The engine starting control method specifically includes: acquiring the crankshaft position signal of the engine; performing credibility analysis on the crankshaft position signal to obtain a credibility analysis result, the credibility analysis result at least including: the crankshaft signal is credible, the crankshaft signal is uncredible, and the crankshaft signal is converted from credible to uncredible; determining a target recognition strategy according to the credibility analysis result, and determining the number of crankshaft revolutions of the engine according to the target recognition strategy, the target recognition strategy and the credibility analysis result having a one-to-one correspondence; executing starting ignition control according to the number of crankshaft revolutions. The present invention improves the crankshaft position detection accuracy, optimizes the engine ignition and combustion timing, avoids ignition shock caused by improper ignition timing, and improves the starting noise reduction effect by formulating a crankshaft revolution identification strategy under different signal states.

To reliably improve a fuel consumption performance and an exhaust gas performance in an engine system having a main combustion chamber and an auxiliary chamber.SOLUTION: An engine system 1 comprises an injector 28 for injecting fuel to a main consumption chamber 26, a main ignition plug 32 for mainly igniting air-fuel mixture of the main combustion chamber 26, and an ECU 100 electrically connected to an auxiliary ignition plug 62 for auxiliary igniting the air-fuel mixture in an auxiliary chamber 60, and outputting control electric signals to each device. The ECU 100 performs control for executing the auxiliary ignition after the main ignition is executed in a low load area where, an engine load is equal to or less than a prescribed reference load, and retarding a timing of the auxiliary ignition compared with a low rotation area not higher than a predetermined reference speed (N1) in a high rotation area with an engine speed higher than the reference speed.SELECTED DRAWING: Figure 7

The invention discloses an ignition control method, device and equipment for a dual-fuel engine and a storage medium. The ignition control method comprises the steps that the engine rotating speed and the engine torque are obtained; determining engine working conditions according to the engine speed or the engine torque; and controlling a spark plug and / or a dual-fuel injector to start according to the engine working condition, the engine rotating speed and the engine torque. According to the technical scheme, the engine rotating speed and the engine torque are obtained, the engine working conditions are determined according to the engine rotating speed or the engine torque, the spark plug and / or the dual-fuel injector are / is controlled to be started according to the different engine working conditions, and different ignition strategies are executed; flexible switching of different ignition modes of spark plug ignition and compression ignition is achieved, and the abnormal combustion problems of CO2 emission, early-burning explosion and the like of the dual-fuel engine are effectively solved.

The invention discloses an ignition angle control method and device of an extended range engine, a vehicle and a storage medium, and the method comprises the steps that for each air cylinder of the extended range engine, the target correction amplitude corresponding to a current knock signal of the air cylinder is obtained, the absolute value of the target correction amplitude is not larger than the ideal correction amplitude, and the target knock signal of the air cylinder is obtained; the ideal correction amplitude is used for correcting an ignition angle and is a preset correction amplitude threshold value corresponding to a target interval to which current working condition parameters of the extended-range engine belong; according to a preset basic ignition angle of the extended-range engine and the target correction amplitude corresponding to the air cylinder, the target ignition angle of the air cylinder is obtained; ignition angle control is achieved through separate cylinders, each cylinder is combined with a current knock signal, a target ignition angle in a better state is obtained under different working condition parameters, oil consumption is reduced, and the performance of an engine is improved.