212results about "Electrical automatic control" patented technology

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 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.

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 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.

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 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.

The invention discloses a multi-ignition device which comprises a long-strip-shaped shell, a plurality of ignition coils arranged on the lower side face of the shell and a circuit board arranged in the shell, a connecting plug is fixed to the upper side face of the shell, and the connecting plug is connected with an external vehicle controller so as to receive multi-ignition signals. The circuit board is connected between the connecting plug and the ignition coils so as to drive the ignition coils to conduct multiple times of ignition after receiving multiple times of ignition signals. According to the multi-time ignition device, multi-time ignition signals of the external vehicle controller are received through the connecting plug, the ignition coil is driven through the circuit board to achieve multi-time ignition, the ignition efficiency and stability are improved, and the multi-time ignition device meets the complex working condition requirements of a vehicle engine.

One aspect of the invention relates to a method (100) for regulating the engine torque produced by an internal combustion engine of a powertrain provided with a mechanical gearbox, a mechanical clutch and control means, the method (100) being remarkable in that, during the acceleration phase of the powertrain, it comprises the following steps carried out by the control means: • Detecting (101) a desire to shift from a gear ratio N to a higher gear ratio N+n; • Degrading (102) the nominal spark advances of the internal combustion engine so as to reduce the engine torque produced by the internal combustion engine.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine and compensating the injection amount of the gas fuel according to the cylinder body temperature signal of the engine. The temperature sensor is used for monitoring the temperature of the cylinder body of the engine in real time, the injection amount of the gas fuel is compensated according to the temperature of the cylinder body of the engine, and the combustion condition in the engine heating process of the engine is stabilized.

The present invention addresses the problem of suppressing an excessive decrease in the output torque of an engine during execution of an inter-cylinder correction process. A drive control device is applied to a vehicle provided with a spark ignition engine having a plurality of cylinders. A first processing circuit of the drive control device executes inter-cylinder correction processing for correcting fluctuations in the magnitude of engine torque at the ignition timing of a plurality of cylinders and adjusting the amount of fuel supplied to the cylinders or the ignition timing for each of the plurality of cylinders. Lower limit protection is set for the amount of fuel supplied to the cylinder or the correction amount of ignition timing when the inter-cylinder correction process is executed.

Internal combustion engine method, comprising: operating an engine in a first mode, the first mode comprising: Confirming the cold start condition of the engine, determining that the boiling point of the fuel in the engine is lower than a threshold boiling point of the fuel, and In response to confirmation of the engine's cold-start condition and determination that the fuel boiling point in the engine is lower than a threshold fuel boiling point, starting the internal combustion engine via a starter motor at an initial cranking speed, while fuel is injected via fuel injectors for a number of combustion engine cycles since the first combustion engine cycle, and subsequently suspending operation of the starter motor and operating the engine via combustion; and Operating the engine in a second mode, the second mode comprising the following: In response to confirmation of the engine's cold-start condition and determination that the fuel boiling point in the engine is higher than a threshold fuel boiling point, the internal combustion engine is started at a second cranking speed while fuel is injected and the ignition spark is deactivated for the number of combustion engine cycles since the first combustion engine cycle, and subsequently the operation of the starter motor is suspended and the engine is operated via combustion, wherein the fuel boiling point is based on a fuel composition in the engine, wherein in the first mode the fuel injection involves initiating fuel supply at top dead center (TDC) of an intake stroke of a combustion engine cycle and terminating fuel supply at bottom dead center (BDC) of the intake stroke of the combustion engine cycle.and wherein, in the second mode, fuel injection includes initiating fuel supply at TDC of the intake stroke of the internal combustion engine cycle and terminating fuel supply at TDC of a compression stroke of the internal combustion engine cycle.

The invention discloses a spark ignition type engine control method, relates to an internal combustion engine, and solves the technical problems of combustion efficiency reduction and single-cylinder misfire easily caused by non-uniform distribution of water in each cylinder in the case of an existing backward temperature compensation technology and a high EGR (Exhaust Gas Recirculation) rate. The method comprises the following steps: acquiring a first humidity value of an intake manifold in an engine, a second humidity value of each cylinder and a reference EGR opening value, calculating a correction coefficient according to the first humidity value, and calculating an EGR target opening value according to the reference EGR opening value and the correction coefficient; and a basic ignition angle is obtained, the humidity offset is calculated according to the second humidity value, the ignition angle compensation amount is calculated according to the humidity offset, and the basic ignition angle is compensated through the ignition angle compensation amount. The invention further discloses a spark-ignition engine control device. It is guaranteed that the engine operates at the knocking boundary for a long time, and efficient combustion is guaranteed.

To solve a piston striking sound problem while suppressing the lowering of engine heat efficiency.SOLUTION: An engine control device has a vibration sensor that detects engine vibrations, and a control system that controls an EGR device and an ignition device. As an EGR control map used for controlling the EGR device, there is a second EGR map in which an EGR rate higher than that of the first EGR map is set. As an ignition control map used for controlling the ignition device, there is a second ignition map in which an ignition timing is set to an advance side compared with the first ignition map. The control system performs band pass filter processing on a vibration signal outputted from the vibration sensor, thereby extracting a signal component in a frequency band relating to piston striking sound. The control system, if the size of the signal component exceeds a threshold value, switches the EGR control map to the second EGR map, and switches the ignition control map to the second ignition map.SELECTED DRAWING: Figure 8

The present invention provides an engine control device that can further reduce engine noise and vibration (NV) (i.e., improve the quietness of the engine). [Solution] The ECU 50 estimates the oil film thickness for each cylinder based on the crank angular velocity, engine load, and oil temperature corresponding to the expansion stroke of each cylinder, and corrects the ignition timing of cylinders whose estimated oil film thickness is thinner than a predetermined value.

The invention discloses an engine EGR rate and ignition angle control method, device and equipment and a medium, and relates to the technical field of hybrid automobiles, the method comprises the steps that a VVT angle mapping table obtained based on engine oil consumption calibration is obtained, and the VVT angle mapping table defines VVT angles of an engine under different working conditions; determining a target VVT angle of the engine based on the VVT angle mapping table; determining an initial EGR rate and an initial ignition angle based on the standard environmental parameters and the target VVT angle; acquiring current environment parameters of the engine; and on the basis of the current environment parameters and the standard environment parameters, collaborative optimization adjustment is conducted on the initial EGR rate and the initial ignition angle, and in the collaborative optimization adjustment process, the target EGR rate and the target ignition angle in the current environment are determined on the basis of the pressure fluctuation rate of the intake manifold.

An engine controller includes an exhaust gas recirculation valve, a fuel injection device, an ignition device, and a controller including a processor. The processor includes a requested torque setter, a surplus torque setter, a comparator, and a correction torque setter. The requested torque setter sets requested torque, on the occasion of restoration from fuel cut. The surplus torque setter sets, on the occasion of the restoration from the fuel cut, surplus torque in combustion based on a flow rate of the air to pass through the exhaust gas recirculation valve. The comparator makes a comparison between the requested torque and the surplus torque. The correction torque setter sets, based on a result of the comparison, correction torque to correct the amount of the air to pass through a throttle valve and to make retard correction of ignition timing.

An engine (11) includes pistons (71), cylinders, at least one fuel injector (61), spark plugs (239), and piston cooling jets (91). The engine (11) includes an Electronic Control Unit (232) configured to receive an engine oil temperature, current coolant temperature, current spark value, calibrated spark value, current engine speed, and current engine torque. The Electronic Control Unit (232) is configured to determine a non-firing piston temperature, coolant temperature and combustion phase modifier, and firing piston temperature. The Electronic Control Unit (232) outputs a predicted piston temperature. A method includes housing pistons (71) in cylinders, supplying air, injecting fuel, combusting an air-fuel mixture, spraying engine oil, and receiving an engine oil temperature, current coolant temperature, current spark value, calibrated spark value, current engine speed, and current engine torque. The method includes determining a non-firing piston temperature, coolant temperature modifier, combustion phase modifier, firing piston temperature, outputting a predicted piston temperature, and coordinating operations of the fuel injectors (61) and spark plugs (239).

To appropriately suppress the torque of the internal combustion engine. [Solution] The control device 100 comprises a spark-ignition type internal combustion engine 1 having a throttle valve 14 and a spark plug 16, to which alcohol fuel containing alcohol is supplied, and a control unit 20 that controls the intake volume and ignition timing of the internal combustion engine 1 by controlling the operation of the throttle valve 14 and the spark plug 16. The control unit 20 controls the operation of the throttle valve 14 to limit the intake volume by restricting the opening of the throttle valve 14 to a predetermined opening or less when the alcohol concentration of the alcohol fuel is less than a predetermined concentration, and controls the operation of the throttle valve 14 to limit the intake volume when the alcohol concentration is above the predetermined concentration, and controls the operation of the spark plug 16 to limit the ignition timing to a predetermined ignition timing or retarded beyond the predetermined ignition timing.

A vehicle engine adapted to control an exhaust gas temperature (EGT) at a catalyst inlet includes an EGT sensor in communication with a system controller and adapted to measure the exhaust gas temperature at the catalyst inlet, the system controller being adapted to compare the measured EGT to a target EGT and, when the measured EGT is greater than the target EGT, to determine that the catalyst inlet is an exhaust gas temperature at the catalyst inlet. Gas exchange within cylinders within the engine is limited during an intake stroke, and turbine efficiency of a variable geometry turbocharger of the engine is increased by increasing boost from the variable geometry turbocharger.

The application provides a control method and device of an engine, a computer readable storage medium and a vehicle. The method comprises the following steps: adjusting the opening degree of an exhaust gas recirculation valve of the engine and the opening degree of a throttle valve of the engine to corresponding predetermined opening degrees respectively when the engine is in an idle operating condition, wherein the idle operating condition is an operating condition in which the engine is in no-load operation; obtaining the pressure of an intake manifold 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 predetermined opening degrees respectively; and increasing the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve when the pressure of the intake manifold is less than or equal to a pressure threshold, so that the pressure of the intake manifold is greater than the pressure threshold. The application solves the problem of high oil consumption caused by pumping oil due to low intake manifold pressure of the engine in the idle operating condition in the prior art.

The application discloses a minimum ignition angle control method, device, equipment and storage medium, and the method comprises the steps of obtaining an engine speed change rate when a transmission system of a vehicle is disconnected, determining whether to enter a fast accelerator condition according to the engine speed change rate, obtaining a preset minimum ignition angle and a minimum ignition angle compensation angle when the vehicle is in the fast accelerator condition, compensating the preset minimum ignition angle by the minimum ignition angle compensation angle after a first time delay after entering the fast accelerator condition, obtaining a corrected minimum ignition angle, controlling the engine to work by using the corrected minimum ignition angle at most within a second time after obtaining the corrected minimum ignition angle, and controlling the engine to work by using the preset minimum ignition angle when the time reaches the second time or the time is within the second time and a quit condition is met.

Provided is a control device for a vehicle in which an engine is mounted. An engine is provided with a three-way catalyst device provided in an exhaust passage. The control device includes a processing circuit. The processing circuit is configured to implement: a determination process for determining whether or not there is a state in which a large amount of ammonia is discharged from the three-way catalytic device; and a combustion temperature reduction process for reducing the combustion temperature of the engine when it is determined in the determination process that the engine is in a state in which the discharge amount is large.

A method for determining a fuel characteristic, the method including receiving a gaseous fuel within a gaseous fuel rail of a dual fuel engine configured to run on at least the gaseous fuel and a diesel fuel. The method may include receiving a pressure signal from a pressure sensor indicating a pressure of the gaseous fuel within the gaseous fuel rail, and identifying at least one of an amplitude and a phase of the pressure signal, The method may further include determining a characteristic of the fuel within the fuel rail based on the amplitude or the phase of the pressure signal, and, based on the determined characteristic of the fuel, modifying an operational parameter of the dual fuel engine.

The application discloses a lean-burn engine control method, device and engine system. The lean-burn engine control method comprises the following steps: obtaining a current torque and a target torque; when the current torque is less than the target torque, obtaining an average effective pressure and an excess air coefficient; when the average effective pressure is in a first pressure range and the excess air coefficient is in a first coefficient range, adjusting an ignition angle, increasing air content and combustible content in a cylinder, and increasing the current torque to the target torque. By using the above technical scheme, the current torque can be increased, the thermal efficiency can be ensured to be high, and the combustion center can be prevented from changing, the ignition angle can be prevented from being large, and the lean-burn engine can be prevented from being damaged by knocking.

This device suppresses vibrations that can occur in a moving vehicle due to the operation of the compressor that compresses the refrigerant used for air conditioning. [Solution] The control device comprises an engine and a compressor that compresses a refrigerant for air conditioning driven by the engine. In a vehicle in motion, it performs air conditioning load torque correction control that reflects the change in air conditioning load torque due to a change in the compressor's driving state in the requested torque based on the driver's operation. The air conditioning load torque correction control includes a first torque correction control that increases the intake air volume to increase the actual air volume torque when the compressor transitions from a de-drive state to a drive state, and decreases the intake air volume to decrease the actual air volume torque when the compressor transitions from a drive state to a de-drive state, and a second torque correction control that retards the ignition timing to decrease the actual air volume torque when the compressor transitions from a de-drive state to a drive state and when it transitions from a drive state to a de-drive state.

Provided is an internal combustion engine control device with which, in a case where error correction processing is performed on a detected unit, it is possible to determine whether or not error correction has been completed. This internal combustion engine control device (50) determines, on the basis of a correction value (Kc) of each of angle sections (Sd), a time interval (ΔTd) and an angle interval (Δθd) or a detection section angular velocity (ωsd) in each detection section (Sd) before correction processing using the correction value of each of the angle sections (Sd), and an ideal section angular velocity (ωid) in each of the angle sections (Sd), whether or not changing of the correction values has been completed for all the angle sections of one rotation of a crankshaft as a whole.