125results about "Advancing/retarding ignition" patented technology

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.

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.

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 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.

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.

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

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).

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.

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.

The present invention pertains to a detection method for detecting a short-lived speed sensing anomaly of an internal combustion engine. The detection method comprises the steps of performing a sensor health check, detecting an engine speed deviation, performing a torque deviation check and identifying whether the detected engine speed deviation refers to a short-lived speed sensing anomaly based on the sensor health check and the torque deviation check. Furthermore, a device suitable for carrying out the detection method according to the present disclosure may be provided, comprising a control unit configured to perform the detection method according to the invention.

The application discloses an engine ignition angle adjusting method, device, equipment and storage medium, and the method comprises the steps of detecting the knock intensity of the engine, controlling the ignition angle of the engine according to the knock intensity, and adjusting the ignition angle of the current gasoline octane number according to the knock back angle of the ignition angle. According to the application, the ignition angle of the engine is controlled according to the knock intensity, and the ignition angle of the current gasoline octane number is adjusted according to the knock back angle of the controlled ignition angle, so that the ignition angle can be adjusted according to different gasoline octane numbers, the knock intensity of the ignition angle at the time of ignition is adjusted, and the performance of the engine is improved.

Methods for thermal control, including: Determine whether a catalytic converter (18) is active; Determine whether a catalyst (20) is active for selective catalytic reduction (SCR); Adjusting the air-fuel ratio of a machine (14) for operation at a stoichiometric ratio and retarding the ignition spark of the machine (14) when the catalytic converter (18) is not active; and Perform fuel injection when the catalytic converter (18) is active and the SCR catalyst (20) is not active; characterized by the fact that the catalytic converter (18) is a three-way catalyst (18); wherein, based on a first temperature of the catalytic converter (18) and a first active volume of the catalytic converter (18), it is determined whether the catalytic converter (18) is active; wherein, based on a second temperature of the SCR catalyst (20) and a second active volume of the SCR catalyst (20), it is determined whether the SCR catalyst (20) is active, wherein the second temperature is an average temperature determined as a weighted mean of temperatures T1 and T2 measured upstream and downstream of the SCR catalyst (20) according to the equation WA = x * T1 + (x-1) * T2, where WA is the weighted mean and x is a calibrated value between 0 and 1; and wherein the fuel injection is carried out by a post-fuel injection and / or by direct injection of fuel into an exhaust system (16) of the machine (14).

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 computer-implemented method that, when executed by data processing hardware of a motor vehicle including a turbocharger having a turbine, causes the data processing hardware to perform operations. One operation includes receiving an accelerator pedal position input indicating that a vehicle accelerator pedal has moved to an overrun position. Another operation includes receiving one or more vehicle performance parameter inputs each corresponding to a measured vehicle performance parameter. Yet another operation includes calculating a vehicle dynamic score based on the one or more vehicle performance parameter inputs. A further operation includes determining a target boost profile based on the calculated vehicle dynamic score. Another operation includes instructing one or more outputs of the vehicle to transition to a dynamic mode to generate an increased turbine power based on the target boost profile.

One object is to appropriately control the heat balance of an ignition device to suppress an increase in the size and cost of the ignition device. An internal combustion engine control device that controls an internal combustion engine for a moving object, the internal combustion engine including: an intake device that draws intake air into a cylinder through an intake port; a fuel supply device that supplies fuel; and an ignition device that ignites an air-fuel mixture containing the intake air and the fuel. An internal combustion engine control device including an ignition device temperature estimation unit and a setting device. The ignition device temperature estimation unit measures or estimates a current temperature of the ignition device and estimates a future temperature, which is a temperature of the ignition device on a future path, based on information regarding a current state of the moving object.The setting device sets a control instruction of at least one of the ignition device, the fuel supply device, or the intake device according to the current temperature and the future temperature.

The hybrid vehicle includes: a generator (6) capable of supplying electricity generated from the battery (4); a drive motor (2) that uses electricity from the battery (4) or electricity generated by the generator (6) to drive the drive wheels (1) of the hybrid vehicle; an internal combustion engine (7) that drives the generator (6); and a first exhaust purification device for exhaust purification, which is installed in the exhaust passage of the internal combustion engine (7). When the temperature of the first exhaust purification device is less than or equal to a specified temperature, the hybrid vehicle performs catalyst temperature control that delays the ignition timing of the internal combustion engine (7). Regarding catalyst temperature control, the ignition timing lag is increased when the vehicle is vibrating, compared to the ignition timing lag when the vehicle is stationary.

An engine control system includes an engine, an intake valve, an ignition plug mounted in a combustion chamber, an exhaust valve; a dual continuously variable valve duration device configured to adjust an intake duration of the intake valve and an exhaust duration of the exhaust valve; a turbine mounted downstream of the engine; a warm-up catalyst (WCC) mounted downstream of the turbine; a gasoline particulate filter (GPF) mounted downstream of the warm-up catalyst; and a controller operably connected to the ignition plug and the dual continuously variable valve duration device and configured to adjust an ignition timing of the ignition plug, the intake duration, and the exhaust duration based on a driving condition of a vehicle, wherein under a condition that lambda (λ) is 1, the controller is configured to adjust the exhaust duration so that an exhaust valve open timing is retarded, and an intake valve close (IVC) timing is maintained to maintain a valve overlap period.

The invention relates to the technical field of engine detection, in particular to an engine knock fault detection method based on vibration signal analysis. The method comprises the following steps: acquiring and preprocessing a voltage vibration signal and a pulse square wave signal of an engine to obtain a vibration digital sequence and a pulse timestamp set; a difference value of adjacent timestamps is extracted from the pulse timestamp set as a time span, a rigid body kinetic equation is constructed in combination with a physical mechanical angle interval, a transient angular acceleration is calculated, a vibration digital sequence is mapped to a crankshaft rotation space, and an equal-angle vibration sequence is obtained; frequency domain conversion is conducted on the equal-angle vibration sequence, mechanical noise is filtered out, a knock residual signal is obtained, knock characteristic energy in the monitoring window is calculated, and when the knock characteristic energy exceeds a preset safety threshold value, a control adjusting instruction is issued. According to the method, the mechanical operation state under the transient variable load is restored, the order fuzzy defect is effectively restrained, and the bottom layer operation load and response delay are reduced.

Provided is an easy engine starting system including: an engine; a centrifugal clutch configured to transmit a driving force of the engine to a driven device; and a control device configured to adjust output of the engine. When the engine is to be started, the engine is accelerated at start engine output which enables the engine to reach a rotation speed higher than a clutch-in rotation speed. The control device has suppression control of suppressing, at the start engine output, the rotation speed to a rotation speed equal to or lower than the clutch-in rotation speed.

This disclosure provides "systems and methods for reducing vehicle emissions." Methods and systems are provided for reducing the release of undesirable emissions into the atmosphere during the start-up event of an engine configured to propel a vehicle. In one example, one method includes providing an alternative heat source and actively delivering heat from said alternative heat source to a heated exhaust oxygen sensor, where the heating element configured to raise the temperature of said heated exhaust oxygen sensor is known to be degraded. In this way, a desired air-fuel ratio can be obtained during the engine start-up event even when the heating element used to raise the temperature of the sensor is degraded, which can therefore reduce exhaust tailpipe emissions that might otherwise be released without such mitigation action.

To appropriately suppress occurrence of knocking in an engine.SOLUTION: An engine device includes an engine equipped with a supercharger having a compressor attached into an intake pipe and outputting power by receiving supply of fuel from a fuel tank, and a control device for controlling ignition timing of the engine with the usage of a leaning value of KCS (knock control system) learning on the basis of occurrence or non-occurrence of knocking in the engine. The control device restricts a load factor of the engine so that the load factor becomes smaller as the learning value is closer to a value on the retard side, and so that the load factor becomes smaller as an engine speed is higher, and / or so that the load factor becomes smaller as an intake temperature of the engine is higher.SELECTED DRAWING: Figure 4

The application provides a transient working condition multi-parameter collaborative calibration method and system of a hybrid internal combustion engine, and the method comprises the following steps: acquiring a data stream in an on-board diagnostic system, and screening feature information of seven key dimensions from the data stream; creating a gene map matching engine, and inputting the feature information of the seven key dimensions into the gene map matching engine; comparing the feature information of the seven key dimensions with pre-stored working conditions in the gene map matching engine, obtaining an optimal working condition, and outputting a corresponding basic parameter package; combining knock energy spectrum characteristics and oxygen sensor offset, and performing matrix operation to optimize the basic parameter package, and obtaining a corrected parameter package; and performing boundary control on an ignition angle based on operating parameters of the internal combustion engine, and using the boundary-controlled ignition angle to constrain the ignition angle in the operation process of the internal combustion engine. The application can dynamically correct each parameter of the internal combustion engine.

This control unit is suitable for vehicles that transmit torque from an internal combustion engine to the drive wheels. The control unit includes a processing circuit for controlling the internal combustion engine. This processing circuit performs ignition timing control, automatic stop control, and automatic start control. Ignition timing control involves repeatedly adjusting the ignition timing based on knock detection results from the initial ignition timing during engine startup. The processing circuit terminates ignition timing control when the engine speed falls below the first speed greater than 0.

An engine control method, an engine, a vehicle, and a computer-readable storage medium, which relate to the technical field of engines. The control method comprises: acquiring a characterizing temperature characterizing the temperature in a combustion chamber; and when an engine is in a compression stroke, controlling, according to a preset rule, a fuel injection system to inject fuel into the combustion chamber, wherein the fuel in the combustion chamber is heated and spontaneously combusted, and input parameters of the preset rule comprise the characterizing temperature.

The present application relates to a control system of a vehicle. The control system includes a first control device and a second control device. The second control device transmits a resonance influence torque or a first motor rotational angular velocity and an information acquisition time that is a time at which the first motor rotational angular velocity is acquired to the first control device. The first control device calculates an engine inertia torque based on an engine rotational angular velocity. The first control device selects, based on the received information acquisition time, a resonance influence torque that is based on the first motor rotational angular velocity acquired at a predetermined derivation time, and derives a sum of the resonance influence torque and the engine inertia torque calculated based on the engine rotational angular velocity derived at the predetermined derivation time as an engine torque.

Engine starting procedure, which includes the following: Starting an engine (10) of a vehicle while a transmission coupled to the engine (10) is in a gear; Turning the engine (10) up to a starting speed; Setting the motor speed to a single target starting speed (302) that is greater than the starting speed and less than an idle speed; and after holding the target motor starting speed (302) at the target motor starting speed (302) for a target duration Adjusting the engine speed to the idle speed.