79results about "Advancing/retarding ignition" patented technology

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.

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.

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 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).

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.

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.

A vehicle control device capable of avoiding deterioration of NV characteristics of a vehicle and properly starting an internal combustion engine by crank rotation of an electric motor. A control device (30) controls a vehicle provided with an engine (11), a motor generator (12) coupled to the engine, and drive wheels (DW) driven by output of at least one of the engine and the motor generator, and the vehicle (1) is capable of starting the engine (11) by crank rotation driven by the motor generator (12), in the case where the engine (11) is started, before the engine (11) is in a fully combusting state, the control device (30) controls motoring torque of the motor generator (12) based on intake air pressure; after the engine (11) is in the fully combusting state, the control device (30) controls regenerative torque of the motor generator (12) based on fuel injection amount to the engine 11 until the engine speed converges within a prescribed range.

An engine control method, an engine, a vehicle, and a computer-readable storage medium, relating to the technical field of engines, comprising the steps of: acquiring a characterizing temperature that characterizes a temperature in a combustion chamber; and controlling a fuel injection system, when the engine is in a compression stroke, to inject fuel into the combustion chamber according to a preset rule, wherein the fuel in the combustion chamber is heated to spontaneous combustion, and an input parameter of the preset rule includes the characterizing temperature.

The application provides a calibration method and device for improving working noise of a range extender. The method comprises: acquiring in-vehicle noise signal data and range extender vibration signal data when the range extender is working; performing angle domain analysis on the in-vehicle noise signal data and the range extender vibration signal data to obtain an angle domain analysis result; determining a target cylinder in the range extender that causes knocking noise of a crankshaft system according to the angle domain analysis result; acquiring a target retardation angle, and calibrating an ignition advance angle of the target cylinder according to the target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the certain cylinder can be reduced, the excitation force acting on the crankshaft system of the range extender can be reduced from the source, and thus the knocking noise of the crankshaft system of the range extender can be improved, and the sound quality inside the vehicle can be improved.

The invention provides a control device for a vehicle, which suppresses the occurrence of knock during the execution of upshift processing in a supercharged operation state. A control device for a vehicle provided with an engine having a supercharger and an automatic transmission, the control device being provided with: a torque control unit for controlling the torque of the engine when the engine is in a supercharged operation state and an upshift process of the automatic transmission is executed; executing a torque reduction process for reducing the opening degree of a throttle valve of the engine while maintaining the supercharged operation state; a determination unit that, prior to execution of the torque reduction process, determines whether or not there is a possibility of knocking occurring due to execution of the torque reduction process, on the basis of at least one of a fuel property, an intake air temperature, an engine temperature, and a knock learning value; and an ignition control unit that delays the ignition timing of the engine during the execution of the torque reduction processing when the determination unit has made the positive determination compared to when the determination unit has made the negative determination.

Control device (1) for an internal combustion engine (100), comprising: a fuel pressure control unit (90) configured to regulate the pressure of a fuel supplied to a fuel injector (134) configured to inject the fuel into an internal combustion engine (100), wherein the fuel injector (134) comprises a valve body, an actuating unit for actuating the valve body, and a fuel injection orifice which is opened or closed according to the actuating of the valve body, wherein a cylinder pressure sensor (140), configured to detect an internal cylinder pressure, which is a pressure in a combustion chamber of the internal combustion engine (100), is attached to the internal combustion engine (100), and wherein the fuel pressure control unit (90) is configured to control the fuel pressure based on a pressure difference between the cylinder internal pressure detected by the cylinder pressure sensor (140) before the valve body is separated from a valve seat and the cylinder internal pressure detected by the cylinder pressure sensor (140) when the valve body is separated from the valve seat.

The invention provides an intelligent advantage-seeking ignition control method oriented to a complex fuel oil environment. The method comprises the steps that real-time operation parameters of an engine are obtained, and self-learning enabling conditions are judged; when the enabling condition is met, forward self-learning optimization is executed with the basic ignition angle or the conservative ignition angle under the EGR working condition as the starting point; monitoring a knock signal in real time in the optimizing process, and dynamically adjusting an ignition angle according to the knock intensity; independently learning areas, and updating the ignition angle compensation value of each area in real time; the ignition angle instruction is corrected through anti-oscillation and protection mechanisms such as partition delaying and signal filtering and is output to an actuator; meanwhile, the refueling working condition is recognized, and self-adaptive resetting of the self-learning value is achieved. Through closed-loop self-learning, detonation dynamic feedback, zoning fine control and EGR collaborative strategies, the method can adapt to fuel quality fluctuation and engine aging, and the dynamic property, fuel economy and emission compliance of the engine are remarkably improved, and particularly the method is suitable for scenes with large fuel quality fluctuation and complex working conditions.

An engine, an engine control method, and a vehicle related to the technical field of engines. The engine includes an engine block, a fuel injection system, and a piston, a cylinder formed in the engine block, the piston slidably disposed in the cylinder, a combustion chamber formed between the piston and an inner wall of the cylinder, the fuel injection system connected to the combustion chamber and used to inject fuel into the combustion chamber, wherein in a single engine operating cycle, total energy generated by combustion of the fuel in the combustion chamber is Q1, exhaust heat of the combustion chamber is Q2, and heat dissipated outward from the combustion chamber is Q3, wherein 35%≦Q2:Q1≦45%, and Q3:Q1≦20%.

The invention provides an ignition gap adjusting device and an ignition gap adjusting method. Remote control equipment automatically controls a motor to act according to an ignition gap detected by a displacement sensor to achieve automatic and efficient adjustment of the ignition gap. A worker checks an image, transmitted by an image acquisition component, of a scale position of a scale indicated by a scale indication component on remote control equipment, so that the ignition gap is intuitively determined; the remote control device controls the motor to act according to an adjusting instruction input by a worker to achieve remote readjustment and calibration of the ignition gap, and therefore the ignition gap can be accurately adjusted to a target value. The displacement sensor, the image acquisition component and the electrode are far away and are powered by the battery, so that the conditions of displacement sensor failure or inaccurate detection, motor false start or overvoltage damage and the like caused by strong electromagnetic interference and high-voltage invasion are not easy to occur, and the device is suitable for scenes with high environmental potential, large potential fluctuation and strong electromagnetic interference.

The invention provides a combustion system, a vehicle and an ignition control method of the combustion system. The combustion system comprises a cylinder body, a containing cavity is formed in the cylinder body, and a piston is movably arranged in the containing cavity; the cylinder cover is connected with the cylinder body, and a combustion chamber is defined by the side, facing the piston, of the cylinder cover and at least part of the piston end face. Wherein a pre-combustion chamber and a mixed gas inlet channel are arranged on the cylinder cover, the outlet end of the mixed gas inlet channel is communicated with the pre-combustion chamber, the bottom of the pre-combustion chamber is communicated with the combustion chamber, a turbulent flow structure is arranged in the mixed gas inlet channel, and the turbulent flow structure is used for changing the flow speed and the flow direction of gas entering the pre-combustion chamber from the mixed gas inlet channel. Through combination of structure optimization and an intelligent control strategy, the ignition problem in a tumble combustion mode is solved, and the requirement for a high-energy ignition system is lowered. And the combustion efficiency and the emission control level of the gas engine are remarkably improved, and knocking is effectively prevented.

The engine control method comprises the steps that the crankshaft angle of an engine is collected according to a first preset frequency, and the electrical angle of the engine is collected according to a second preset frequency; determining an electrical angle characteristic value based on the electrical angles acquired in the historical time period when each electrical angle is acquired; every time one crankshaft angle is collected, whether the engine is located in the knock detection window or not is judged based on the crankshaft angle collected finally at present; if the engine is located in the knock detection window, actual knock energy is determined based on the current finally collected electrical angle; judging whether the engine is knocked in the current knock detection window or not; and if the engine is knocked in the current knock detection window, the running state of the engine in the current knock detection window is adjusted based on the actual knock energy which is finally obtained at present. The engine knock can be inhibited in time, the combustion efficiency is optimized, and therefore the reliability of the engine is guaranteed.