849results about "Ignition 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 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.

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.

The invention discloses a multi-closed-loop parameter autonomous smooth switching control method based on load characteristic identification. A variable load, a load characteristic sampling unit, a bias superposition unit, a closed-loop reference given unit, a closed-loop switching unit, a closed-loop control unit and a power output unit are included. The load characteristic sampling unit transmits the acquired variable load circuit and other signals to the closed-loop switching unit after bias superposition of the bias superposition unit; the closed-loop switching unit performs phase operation on the bias superposed signal to obtain a corresponding power supply closed-loop control mode, and transmits the identified power supply closed-loop control mode to the closed-loop control unit; and the closed-loop control unit is used for switching a power supply closed-loop control mode by combining a closed-loop reference value output by the closed-loop reference giving unit so as to control the power output unit to output corresponding power to the variable load. According to the invention, through the self-generated conduction characteristics of the diodes, the hysteresis function can be realized without adding extra algorithms and circuits, and autonomous smooth switching can be realized.

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.

The invention discloses a suspension control system based on a PSI5 communication protocol, and relates to the technical field of automobile suspension control, and the suspension control system comprises a topological adaptation module which collects a vehicle state and a topological structure, constructs a mapping function from the vehicle state to the topological structure, and dynamically generates a topological structure set adaptive to the vehicle state according to the mapping function; the interface reconstruction module is based on an electromagnetic relay as a switching control unit, drives the electromagnetic relay to act after receiving and analyzing the topological structure set, reconstructs the topological structure by switching the series / parallel connection relation of an actuator interface, and outputs a configuration frame instruction; the scene control module is used for identifying the current driving scene of the vehicle, calling the reconstructed topological structure, matching a control algorithm of the corresponding scene and carrying out scene optimization on a PSI5 configuration frame instruction; the driving scene comprises a no-load mode, a heavy-load mode and an off-road mode.

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 system (S) is provided with: a front situation detection device (200) that detects a situation in front of a vehicle (1); a vibration source (20) that generates vibrations to be transmitted to a driver of the vehicle (1); and a control unit (150) that performs control for changing the state of the oscillation of the oscillation starting source (20, 20 ', 51, 53, 63, 75) to a state corresponding to the degree of urgency in accordance with the degree of urgency obtained using information detected by the forward condition detection device (200).

The invention discloses an intelligent switching control method and system for a double-voltage automobile generator, and relates to the technical field of automobile electrical control, and the method comprises the following steps: S001, constructing a frequency response baseline of an automobile power distribution network, and calibrating an inductance parameter of a wiring harness and a capacitance parameter of a filter based on frequency response measurement data; and generating an inherent frequency distribution diagram for reflecting the dynamic electrical characteristics. According to the method, the frequency response base line and the harmonic characteristic spectrum are constructed, so that accurate identification and dynamic prediction of the resonance risk are realized; avoiding the inherent frequency by adopting a multi-level control frequency planning strategy; virtual impedance and an active damping mechanism are introduced to improve the switching stability; and closed-loop optimization control is constructed in combination with residual signal feedback, and continuous convergence of the control performance is realized. According to the overall scheme, the stability, robustness and electromagnetic compatibility of the voltage switching process are improved, and safe operation of the double-voltage architecture under complex working conditions is guaranteed.

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 a load-oriented self-adaption double-source waste heat mode switching control method, particularly relates to the technical field of industrial process control and waste heat comprehensive utilization, and aims to solve the problems that heat supply mode switching in an existing double-source waste heat system depends on artificial experience, waste heat supply cannot be matched in a self-adaption mode along with load change, and the working efficiency is low. The waste heat utilization rate is low, the heated load temperature fluctuation is large, and the operation stability is poor. A heat exchange topology model is established in a double-source waste heat system, a load heat demand track and a waste heat capacity fingerprint are synchronously constructed in a rolling time window, and a heat supply mode sequence is optimally selected by taking a load heat demand satisfaction degree, a waste heat utilization degree and a mode switching cost as indexes under an equipment operation constraint and a mode switching constraint. Therefore, the effects of automatically matching the heat load and the waste heat supply under the condition of dynamic change of the working condition and the load, giving consideration to temperature stability and efficient utilization of the waste heat, reducing manual adjustment and improving the system energy efficiency and the operation stability are achieved.

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.

The invention discloses a main-standby switching method, device and system for dual hot standby, and relates to the technical field of ship intellectualization and industrial internet. The method comprises the following steps: when it is determined that first target data which is not synchronized by second equipment exists in first equipment, obtaining first network state information between the first equipment and the second equipment; determining a first data synchronization strategy according to the first network state information; sending the first target data to the second device according to the first data synchronization strategy; and when a first switching instruction sent by the control device is received and it is determined that all the first target data are sent to the second device, operation of the target service is stopped, and the control device is further used for sending a second switching instruction to the second device, so that the second device operates the target service when it is determined that the first device stops operating the target service. According to the method, the reliability of the data synchronization process is ensured, and then the stability and continuity of the target service after main-standby switching are 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 an ignition system of a methanol rarefied engine and a vehicle. The system comprises an ignition device and a control system. The ignition device comprises a main combustion chamber and a pre-combustion chamber; the main combustion chamber is provided with an air inlet for introducing air into the chamber and a main ejector for ejecting methanol; the pre-combustion chamber is provided with an ignition injector, a multi-electrode spark plug and a plurality of injection holes communicated with the main combustion chamber; the control system is configured to regulate and control the injection pressure, the injection amount, the injection moment and the ignition moment of the main combustion fuel and the ignition fuel in real time by monitoring the rotating speed, the air inlet amount and the environmental parameters of the engine in real time, so that stable ignition under different working condition parameters is achieved, and the air-fuel ratio under various working conditions is regulated and controlled. By optimizing the ignition system, the engine can be stably ignited and efficiently combusted under different environment working conditions, so that the economic performance of the methanol rarefied engine is further improved on the basis of realizing stable ignition.

To prevent backfire of an engine due to unintended discharging in an ignition plug at low cost, without generating a positive voltage during ignition coil charging, in a spark ignition hydrogen engine.SOLUTION: A control device of a spark ignition hydrogen engine sends, to an igniter of an ignition device, a main discharge ignition signal to ignite hydrogen mixture, and an auxiliary discharge ignition signal to reduce an open-circuit voltage of a secondary coil during an intake stroke compared to an open-circuit voltage at the end of main discharge. Therefore, it is possible to set the open-circuit voltage during the intake stroke to the minimum value of a breakdown voltage in the spark ignition hydrogen engine to prevent backfire of the engine.SELECTED DRAWING: Figure 8

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.

According to the mode switching method, the controller, the airway clearance equipment, the storage medium and the program product provided by the embodiment of the invention, the oscillation airflow under different oscillation frequencies is output after operation is performed for the preset duration in the airway oscillation mode or the mechanical inhalation and exhalation mode, and the oscillation airflow under different oscillation frequencies is output for any oscillation frequency. The method comprises the following steps: acquiring response information of a user to oscillation airflow at oscillation frequencies, determining an impedance parameter of the user according to the response information at each oscillation frequency, determining an operation mode at the next moment according to the impedance parameter, and executing the operation mode, according to the method, the response information of the user under the oscillation airflow is obtained to determine the impedance parameter representing the blocking condition of the respiratory system of the user, so that the adopted airway clearance mode is automatically adjusted according to the real-time breathing state of the user, and the sputum discharge effect is improved.

The invention discloses an electric actuator control method and system, and the method comprises the following steps: carrying out the safety check of hardware connection, and carrying out the safety test of an electric actuator; basic parameters and control parameters of the actuator are set, the basic parameters and the control parameters are matched based on the control demand information, and a control mode is selected; controlling the actuator to act based on the control mode, and acquiring state information of the actuator in real time; comparing the actuator state information with the limit state information to obtain a state deviation rate; judging whether the state deviation rate is greater than or equal to a set deviation rate threshold value; if yes, an emergency processing strategy is matched with the electric actuator based on the early warning information; if yes, state information of the actuator is displayed in real time; different control modes are selected according to different requirements to analyze the state of the electric actuator, so that faults and abnormities of the electric actuator are accurately and efficiently analyzed, dynamic early warning is carried out, and the use safety of the electric actuator is improved.

The crankshaft-free detonation engine comprises at least one detonation chamber, a connecting rod, a power output gear set, a linkage control rod and a return device, the detonation chamber is used for containing detonation materials and generating power and is provided with a filling opening, an exhaust opening and a firing device, and when two detonation chambers are included, the two detonation chambers are in linkage return through a mechanical structure; one end of the connecting rod is connected with a piston in the detonation chamber, the other end of the connecting rod makes contact with the power output gear set, and the connecting rod pushes the power output gear set through a one-way helical tooth structure and only allows power to be transmitted in the specific direction. Therefore, according to the engine, a crankshaft is abandoned, detonation kinetic energy is directly tangent to an output gear, the conversion efficiency is improved, exhaust and detonation sequences are accurately controlled, energy waste is reduced, fuel compatibility is wide, all materials capable of generating explosions can be used, parameters can be adjusted according to fuel to promote energy to be multiple, a power gear set is changed according to needs, and high-power output is obtained simply through multi-machine parallel connection. The structure is simplified through unique design, and cost and difficulty are reduced.

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.

The invention discloses an electrolytic bath flexible switching control system, method and device based on time sequence collaboration, in the system, a voltage detection circuit is used for collecting the real-time voltage of a direct current bus, a main controller is used for receiving the real-time voltage, and when it is detected that the real-time voltage of the direct current bus is lower than the minimum voltage threshold value and the duration is met, the main controller is connected with the voltage detection circuit; controlling the output current of the power converter to be zero, outputting a relay closing instruction, and controlling the output current of the power converter to be continuously increased to a steady-state working value from zero according to a preset ramp function after a preset waiting period; continuous and smooth transition of zero current from zero to a set value is achieved, electrical and mechanical impact is thoroughly eliminated, material cost and complexity of the system are remarkably reduced, voltage impact of a direct-current bus is avoided, and stable operation of other devices in the system is guaranteed.

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.