242results about "Advancing/retarding ignition" patented technology

The embodiment of the invention is suitable for the technical field of automobiles, and provides an ignition angle correction method and device, an engine and a vehicle, and the method comprises the steps that if a knock retreat angle is larger than a first retreat angle threshold value, a basic ignition angle corresponding to basic fuel oil is obtained according to current engine state information; the mark corresponding to the basic fuel oil is smaller than the mark corresponding to target fuel oil of the engine; controlling the engine to execute ignition operation based on the basic ignition angle; and if the first number of times that the knock retreat angle of the engine within the preset duration is larger than the second retreat angle threshold value meets the first preset condition, the basic ignition angle is periodically corrected according to the target stride on the basis of a preset correction period till the difference value between the corrected basic ignition angle and the target ignition angle meets the second preset condition. The method provided by the embodiment of the invention can reduce the probability of phenomena such as knocking and abnormal combustion of the engine, so that the fault probability of the engine is reduced.

The present invention relates to the field of engine control technology, and specifically provides an engine electronic main water pump control method, device and storage medium. In the method: S1, obtains a first parameter group and a knock compensation parameter, and determines whether the electronic main water pump can start closed-loop control based on a target water temperature based on the first parameter group and the knock compensation parameter. If the determination is yes, enters S2; S2, determines whether the conditions for starting the knock compensation function are met based on the current engine state; if the determination result is yes, enters S3, and if the determination result is no, enters S5; S3, determines whether knock compensation is performed based on the current electronic main water pump output offset. If the electronic main water pump output offset is greater than a preset value, knock compensation is performed and enters S4; otherwise, enters S5; S4, switches the closed-loop control based on the target water temperature to the open-loop control based on the target water temperature; S5, starts the open-loop control strategy based on the target water temperature; in this way, the purpose of increasing the engine cooling intensity and thermal efficiency is achieved.

[Problem] Provided are an engine device in which an abnormal combustion suppression method is appropriately determined and which can be driven while suppressing abnormal combustion; and a method of controlling the engine device. [Solution] In an engine device 1 driven by gaseous fuel, abnormal combustion occurring in a combustion chamber 12a of an engine 2 is detected, an occurrence frequency and an occurrence intensity of the abnormal combustion are monitored, and a suppression method for suppressing the abnormal combustion is determined according to the occurrence frequency and the occurrence intensity. At least one of ignition timing of the gaseous fuel, an air excess ratio of intake air in a mixture gas composed of the gaseous fuel and the intake air, and shut-off of the gaseous fuel is controlled as the suppression method in the engine device 1

An ignition diagnostic system and method for evaluating and optimizing the ignition performance of internal combustion engines (ICEs), such as those that burn hydrogen (H2) and / or other fuels. According to one example, the ignition diagnostic system and method use an artificial intelligence (AI) model with one or more machine learning (ML) algorithm(s) to identify, predict and / or otherwise evaluate abnormal combustion events, and to provide such information to an electronic control unit (ECU) in real-time. The ECU, in turn, can make combustion-related modifications to one or more components of the ignition system to optimize performance. By integrating the AI model into the ignition diagnostic system and method, a fast and simplified solution is provided that can be implemented across a wide variety of ICEs, including those that burn alternative fuels, where detecting abnormal combustion events and monitoring combustion-related parameters can be important.

The invention relates to the technical field of engines, in particular to an anti-knock ignition system of a hydrogen internal combustion engine, a control method and device of the anti-knock ignition system, a storage medium and electronic equipment. The system comprises an ignition coil, an external resistor and a spark plug, wherein the external resistor is connected to the secondary end of the ignition coil in parallel and close to the side where the spark plug is located; the control method comprises the steps of obtaining a current ignition advance angle; calculating a current knock index; whether the knock index is smaller than a current knock index threshold value or not is judged, if not, the ignition advance angle is adjusted according to a preset updating path, and the preset updating path is jointly determined according to the ignition advance angle, the knock index, the knock index threshold value and the adjusting coefficient; and if yes, the current ignition advance angle is kept, and an ignition control signal is sent according to the current ignition advance angle. Compared with the prior art, the method has the advantages that the risk of secondary discharge of the ignition coil is reduced, and engine knock suppression under all working conditions is achieved.

[Problem] Provided are an engine device in which a combustion condition of an engine is grasped and abnormal combustion can be predicted before the occurrence of abnormal combustion; and a method of controlling the engine device. [Solution] In an engine device 1 driven by gaseous fuel, combustion duration in a combustion chamber 12a in an engine 2 is detected, abnormal combustion occurring in the combustion chamber 12a is estimated based on a correlation between the combustion duration and abnormal combustion (backfiring), and a suppression method for suppressing the abnormal combustion is determined when the abnormal combustion is estimated. The engine device 1 performs control to shorten the combustion duration as the suppression method.

Method for controlling a spark-ignition engine having an exhaust aftertreatment system with a particulate filter and a catalyst located downstream of the particulate filter, comprising: Adjusting the ignition timing, at which at least one cylinder of a spark-ignition engine (10, 200, 300) receives a spark, to a retarded setting. when the amount of soot retained by a particulate filter (230, 240, 252) exceeds a threshold value and if the engine load is less than a threshold value, wherein a quantity of fuel supplied to at least one cylinder provides rich or stoichiometric exhaust gases which are fed to the exhaust aftertreatment system, while the ignition angle at which a spark is supplied to the at least one cylinder is retarded, and whereupon the engine's air / fuel mixture is subsequently controlled to be lean in order to oxidize the soot held by the particulate filter, where the amount of oxygen stored in the catalyst is monitored and, if this exceeds a first threshold, the air / fuel mixture of the engine is increased to a richer mixture until the amount of oxygen stored in the catalyst is less than a second threshold, whereupon the air / fuel mixture is controlled to a leaner mixture.

The present invention relates to a method for operating an internal combustion engine (100), wherein, in order to abruptly reduce a torque of the internal combustion engine (100) and / or to provide a low torque by the internal combustion engine (100), a retarded ignition angle adjustment is carried out, wherein water is injected into an intake tract (2) of the internal combustion engine (100) by means of a water injection system (4), and wherein a limit ignition angle for the ignition angle adjustment is determined based on a quantity of water injected by the water injection system (4). The present invention further relates to an internal combustion engine (100) comprising a water injection system (4) and a control unit (5) that is configured to carry out an inventive method for operating the internal combustion engine (100).

The invention relates to a device for operating an internal combustion engine with fuel. The device is configured to determine a standard ignition angle based on ignition angle characteristic data for an actual operating point of the internal combustion engine and to determine a knock limit distance of the standard ignition angle from a knock limit of the internal combustion engine based on knock limit distance characteristic data for the actual operating point of the internal combustion engine. The device is also configured to determine an actual ROZ value of the fuel and / or an operating ignition angle for operating the internal combustion engine on the basis of the standard ignition angle and on the basis of the knock limit distance.

The invention relates to a device for operating an internal combustion engine with a fuel. The device is set up to determine a standard ignition angle for an actual operating point of the internal combustion engine on the basis of ignition angle characteristic data, and to determine a knock limit distance of the standard ignition angle from a knock limit of the internal combustion engine on the basis of knock limit distance characteristic data for the actual operating point of the internal combustion engine. The device is also set up to determine an operating ignition angle for the operation of the combustion engine and / or an actual RON value of the fuel on the basis of the standard ignition angle and on the basis of the knock limit distance.

A method for detecting pre-ignition in a large engine having at least one cylinder in which a piston is arranged movable back and forth in an axial direction between a bottom dead center and a top dead center, wherein the large engine can be operated at least in a gas mode, in which an amount of gas is introduced as fuel into the cylinder, the gas is mixed with scavenging air and combusted at an air-gas-ratio, wherein during operation in the gas mode a first pressure (P1, P1') in the cylinder is measured at a first position (KW1) of the piston, and a second pressure (P2, P2') in the cylinder is measured at a second position (KW2) of the piston, wherein the first position (KW1) and the second position (KW2) are after the bottom dead center and before the top dead center. A peak pressure (PC, PC') is calculated from the first pressure (P1, P1') and the second pressure (P2, P2'), and pre-ignition is detected by comparing the peak pressure (PC, PC') with a threshold value. Furthermore, a large engine is proposed.

To appropriately determine occurrence of preignition even when vibration caused by the preignition is small.SOLUTION: A control device 100 determines occurrence of preignition on the basis of an output value obtained by a knocking sensor 48 provided in an internal combustion engine 1 that uses hydrogen as fuel. The control device 100 executes integration processing for calculating an integrated value of the output value obtained by the knocking sensor 48 in a specified period before ignition timing of an air-fuel mixture and determination processing for determining occurrence of preignition on the basis of the integrated value.SELECTED DRAWING: Figure 1

The present disclosure provides a method and system for operating an engine. The system and method for operating an engine including a compression ratio connecting rod for adjusting the engine's compression ratio are described. The system and method provide different ways to diagnose the presence or absence of engine misfire in response to engine operating regions that may be more or less susceptible to torsional engine crankshaft vibration. In one example, engine misfire may be determined in response to a force applied to the engine's compression ratio changing connecting rod.

The invention relates to the technical field of knock control, and discloses an intelligent control system and method for engine knock and preignition, and the method comprises the following steps: collecting engine knock signal data and preignition signal data, and carrying out the signal processing of the knock signal data and the preignition signal data, the method comprises the following steps: generating knock intensity data and preignition intensity data, and during engine knock and preignition identification, setting multi-stage identification thresholds including a basic threshold, a dynamic self-learning threshold and a temperature compensation threshold, and updating the thresholds in real time by utilizing a self-learning algorithm, so that the engine knock and preignition identification accuracy is improved. The method can effectively adapt to sensor signal characteristic change caused by engine wear, fuel quality difference and environment change, solves the problems of misjudgment and missed judgment caused by a fixed recognition threshold value, ensures the accuracy and reliability of knock and preignition recognition, reduces control errors, and improves the reliability of knock and preignition recognition. And the dynamic property, the economical efficiency and the driving smoothness of the engine are effectively improved.

A method for controlling a turbocharged hydrogen engine for burning an air-hydrogen mixture having an air-hydrogen ratio λ greater than 1. The hydrogen engine is configured to assume steady operating states and transient operating states, wherein ignition timings are more retarded in the transient operating states than in the steady operating states.

The invention relates to a method and a device for regulating the temperature of a component (170) in an exhaust duct (110) of an internal combustion engine (100), wherein the exhaust duct (110) has a temperature sensor (180) which is arranged in the exhaust duct (110) upstream of the component (170), wherein the method comprises the following steps: - providing a control circuit for regulating the temperature of the component (170); - detecting a measurement signal (310) using the temperature sensor (180) during operation of the internal combustion engine (100), wherein the measurement signal (310) 10) characterizing an exhaust gas temperature (312) of the exhaust gas (160) upstream of the component (170), wherein the measurement signal (310) is used as a measured control variable (330) for the control loop for controlling the temperature of the component (170); providing a temperature model (320) for the exhaust gas temperature (312) of the exhaust gas (160) upstream of the component (170), wherein the temperature model (320) is used as a predictor for the control loop, and wherein a modeled control variable (340) is provided from the temperature model (320).

Task: In a signal generating device for motors having a staged pulse wheel on the side of a rotor, a setting is simplified to make a wave height value of a pulse signal generated when a stator detects a first-stage pulse wheel and a wave height value of a pulse signal generated when it detects a second-stage pulse wheel equal. Means for solving the problem: There is a rotor 3 which has a stage encoder wheel 303 which has a first stage encoder wheel 303A and a second stage encoder wheel 303B, and a stator 4 in which a stator iron core which has a magnetic pole opposite to the encoder wheel at the tip is wound with a signal coil.The wave height value of the pulse signal generated when the stator 4 detects the first-stage pulser wheel is limited to be lower than the wave height value of the pulse signal generated when it detects the second-stage pulser wheel by providing, at the tip of the first-stage pulser wheel 303A, a part deformed to inhibit a change in a magnetic flux flowing through the stator iron core that occurs when the tip of the first-stage pulser wheel 303A of the rotor 3 starts to oppose the magnetic pole of the stator iron core 4a.

A method for detecting and mitigating self-ignition in a cylinder (114) of an internal combustion engine (102), the method comprising: Providing a first sensor (119) for sensing a crank angle of a crankshaft (118) of the engine (102); Providing a second sensor (152) for detecting (220) a knock intensity signal in the cylinder (114) of the engine (102); Determining (210) the crank angle using the first sensor (119); Calculating (230, 235) a knock intensity signal indicative of cylinder pressure when the crank angle is between a first predetermined crank angle and a second predetermined crank angle; Determining (230, 235) at least one property of the knock intensity signal; Comparing (240) the at least one characteristic of the knock intensity signal with at least one predetermined characteristic; Determining (245) whether the at least one characteristic of the knock intensity signal exceeds the at least one predetermined characteristic; and Performing (250) at least one mitigation measure for the auto-ignition if the at least one property of the knock intensity signal exceeds the at least one predetermined property, characterized in that performing (250) the at least one auto-ignition mitigation measure comprises adjusting (280) a position of a camshaft (18) when the engine speed is between two predetermined engine speed thresholds, which are defined as a fifth predetermined engine speed threshold (ES 5 ) and as a sixth predetermined engine speed threshold (ES 6 ) and the engine load is between two predetermined engine load thresholds, which are referred to as a fifth predetermined engine load threshold (EL5 ) and as a sixth predetermined engine load threshold (EL 6 ) is located.

An engine includes pistons, cylinders, at least one fuel injector, spark plugs, and piston cooling jets. The engine includes an Electronic Control Unit 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 is configured to determine a non-firing piston temperature, coolant temperature and combustion phase modifier, and firing piston temperature. The Electronic Control Unit outputs a predicted piston temperature. A method includes housing pistons 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 and spark plugs.

To provide a method for detecting pre-ignition in a large engine.SOLUTION: A method is proposed, where a large engine can be operated at least in a gas mode, in which an amount of gas is introduced as fuel into the cylinder, the gas is mixed with scavenging air and combusted at an air gas-ratio, where during operation in the gas mode a first pressure (P1, P1') in the cylinder is measured at a first position (KW1) of the piston, and a second pressure (P2, P2') in the cylinder is measured at a second position (KW2) of the piston, where the first position (KW1) and the second position (KW2) are after the bottom dead center and before the top dead center. A peak pressure (PC, PC') is calculated from the first pressure (P1, P1') and the second pressure (P2, P2'), and pre-ignition is detected by comparing the peak pressure (PC, PC') with a threshold value. Furthermore, a large engine is proposed.SELECTED DRAWING: Figure 1

The invention relates to a method for correcting a minimum ignition setting (1) of an internal combustion engine of a motor vehicle powertrain, the internal combustion engine having an exhaust gas outlet, characterized in that the method comprises steps of: Analyzing (11) an exhaust temperature (2) at the exhaust gas outlet; Determining (12) a temperature delta between the previously analyzed exhaust temperature and a predetermined maximum exhaust temperature; Determining (13) a correction factor from the previously determined temperature delta; and, Calculating (14) a limit of the minimum ignition setting (4) as a function of the previously determined correction factor. Figure 1

A straddled vehicle (1) includes an accelerator manipulation detection sensor (40) including a coupling part (401) and a direct detection part (402), the coupling part being connected to a manual accelerator operator (30) without any mechanical wire, the direct detection part being configured to directly detect a change in position of the coupling part. While a crankshaft (101) is in forward rotation or is stopped after a control device (50) stops a combustion operation of an engine (10) in response to an establishment of an idling stop condition, the control device applies: a rotational resistance; a force in forward rotation direction; or a force in reverse rotation direction, to the crankshaft by means of a starter motor (52). Then, when, as one condition, movement of the position of the coupling part (401) from an initial position to an adjacent region is detected based on a signal from the accelerator manipulation detection sensor (40), the control device (50) rotates the crankshaft (101) by means of the starter motor (52), to restart the engine (10).

Disclosed is an engine control device (10) that reduces knocking by controlling an ignition timing (θ) of an engine (1), and that is provided with a first determination unit (11), a second determination unit (12), and a selection unit (13). The first determination unit (11) calculates knock occurrence probability (P) and likelihood (L) on the basis of the number of times of ignition (n) and the number of times of knocking (k), and determines whether or not it is necessary to change the ignition timing (θ), on the basis of the magnitude of the likelihood (L). The second determination unit (12) calculates knock intensity (S) or knock occurrence probability (P), and determines whether or not it is necessary to change the ignition timing (θ), on the basis of the knock intensity (S) or the knock occurrence probability (P). The selection unit (13) selects the determination result of one of the first determination unit (11) and the second determination unit (12) on the basis of a predetermined condition.

System for a vehicle (10), comprising: a power machine (14); a torque converter (40) connected to the engine (14); a transmission (16) connected to the torque converter (40) via an input shaft (152); a particulate filter (PF) connected to the engine (14); and an engine control module (30) connected to the engine (14), the transmission (16), and the particulate filter (PF), the engine control module (30) configured to perform maintenance regeneration operations comprising: Determining whether the particulate filter (PF) is above a predetermined service regeneration limit; Determining whether the transmission (16) is in the park or neutral position; and if the particulate filter (PF) is above a predetermined service regeneration limit and the transmission (16) is in park or neutral, performing service regeneration operations including locking the input shaft (152) to the transmission (16) and increasing engine speed to retard an ignition spark in the engine (14) and increase a temperature in the particulate filter (PF).

The present invention comprises an engine, a centrifugal clutch for transmitting the drive force of the engine to a driven device, and a control device for adjusting the power of the engine. The engine is accelerated by starting engine power capable of reaching a rotational speed higher than the clutch-in rotational speed at the time of starting. The control device has suppression control for suppressing the starting engine power so that the rotational speed does not exceed the clutch-in rotational speed.

A method (100) of operating an internal combustion engine (1) is disclosed. The method (100) comprises: calculating (101) a value of the torque (Ls) generated by the engine (1) by combusting fuel at a predetermined operation stage (Os), monitoring (103) temperature (T) of exhaust, comparing (105) the monitored temperature (T) with a threshold value (Tp), comparing (107) the calculated value of the torque (Ls) with a threshold value (Lp). If the monitored temperature (T) exceeds the threshold value (Tp), and if the calculated value of the torque (Ls) is lower than the threshold value (Lp): connecting (109) the load assembly (5) to the rotatable part (7) and activating (111) the fuel managing arrangement (3) to adjust combustion of the fuel such that the combustion occurs earlier than combustion at the predetermined operation stage (Os). A control arrangement (9), a computer program, a computer-readable medium (200), an internal combustion engine (1) and a vehicle (10) are also disclosed.

The invention relates to a method and a device for controlling an internal combustion engine (1) which has a prechamber spark plug (3) and a hook-type spark plug (4) in a combustion chamber (2). In a first operating range of the internal combustion engine (1), the combustion in the combustion chamber (2) is triggered by the prechamber spark plug (3), and in a second operating range of the internal combustion engine, the combustion is triggered by the hook-type spark plug (4).

Provided are an engine control device and a vehicle with which the methane number of LNG fuel can be estimated. The engine control device is capable of using liquefied natural gas as fuel, and is provided with an acquisition unit that acquires an ignition retard control amount for avoiding engine knocking, and an estimating unit that estimates the methane number of the liquefied natural gas on the basis of an index value indicating the acquired ignition retard control amount.

Engine operating procedure comprising: Supplying an ignition spark for combusting an air-fuel mixture in an engine (10); Storing particles generated by combustion of the air-fuel mixture in a particle filter (71); Heating the particulate filter (71) to enable particulate filter regeneration while the engine load is less than a threshold value and while the engine (10) is rotating via a torque supplied by vehicle wheels, characterized in that the heating of the particulate filter (71) takes place by terminating the delivery of an ignition spark to a cylinder, and the method further comprises injecting fuel into the cylinder during an exhaust stroke of the cylinder in response to an increase in engine load.

In one instance, disclosed herein is an engine system, comprising: an engine comprising a plurality of engine cylinders; and a controller operative to: control a respective ignition timing for each engine cylinder of the plurality of engine cylinders; detect an increase of a knock intensity of the engine; after detecting the increase of the knock intensity of the engine, compare the knock intensity of the engine to a threshold knock intensity; if the knock intensity of the engine is greater than the threshold knock intensity, retard the respective ignition timing for each engine cylinder of the plurality of engine cylinders by the same amount; and if the knock intensity of the engine is less than the threshold knock intensity, retard a first ignition timing of a first engine cylinder by a first amount independently of a second ignition timing of a second engine cylinder.