256 results about "Ignition timing" patented technology

The invention relates to the technical field of ignition systems of gas turbines, and discloses a special ignition system for a gas turbine, which comprises a monitoring control layer, an energy distribution layer and a combustion optimization layer. The monitoring control layer monitors parameters such as combustion chamber pressure fluctuation in real time through multiple types of sensors and executes phase synchronization and injection control. The energy distribution layer is provided with a multi-stage energy release strategy and a self-adaptive time sequence matching mechanism, a stable ignition energy field is constructed, and physical and digital space linkage regulation and control are achieved through a multi-modal energy interface; and the combustion optimization layer establishes a multi-dimensional mapping combustion state control model based on a dynamic combustion algorithm and real-time data, and adopts a collaborative optimization algorithm to calibrate an ignition time sequence, regulate and control a fuel mixing ratio and maintain flame stability. According to the system, through multi-dimensional energy fusion, model parameter dynamic correction and intelligent algorithm application, the accuracy, stability and multi-working-condition adaptability of the gas turbine ignition process are remarkably improved, and the system is suitable for gas turbine efficient combustion control in the fields of aerospace, electric power and the like.

To provide a start control device capable of securing excellent startability even when ethanol concentration in fuel is high and an intake air temperature and a temperature of an internal combustion engine are low.SOLUTION: A start control device (30) applied to an internal combustion engine (E) driven by combustion of fuel containing ethanol includes: ethanol concentration determination means (31) for determining ethanol concentration in the fuel; and ignition timing change means (33) for changing ignition timing when starting the internal combustion engine (E) according to the ethanol concentration, wherein if the ethanol concentration determination means (31) determines that the ethanol concentration exceeds a threshold value when starting the internal combustion engine (E), the ignition timing change means (33) executes 360° ignition, which executes ignition every 360° of rotation of a crankshaft (3) of the internal combustion engine (E) until the internal combustion engine (E) starts.SELECTED DRAWING: Figure 3

[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

The hybrid electric vehicle includes an engine, a motor, a clutch, an accelerator operation amount detecting unit, and a control device. The control device is configured to include: a determination unit configured to determine whether or not the accelerator operation amount is equal to or greater than a threshold value when there is a start request for the engine; and an ignition timing control unit configured to advance an ignition timing of the engine, when an affirmative determination is made by the determination unit, than when a negative determination is made by the determination unit.

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 invention provides a motorcycle ignition auxiliary system which comprises a high-energy ignition module, an intelligent ignition time control module, a high-reliability electronic element module, a strong anti-interference module, an intelligent integration and communication module, a compatibility adaptation module and a fault diagnosis and early warning module. Through close cooperative work of all the modules, the ignition performance and reliability are remarkably improved, the ignition time and energy can be accurately controlled, the system adapts to various working conditions and environments, the anti-interference capacity is enhanced, intelligent data interaction and decision making are achieved, all kinds of added equipment are effectively compatible, faults are accurately diagnosed and early warned, and remote maintenance is supported; the power performance, the economical efficiency, the stability, the intelligent level, the use convenience and the safety of the motorcycle are greatly improved, a solid guarantee is provided for high-performance operation and personalized modification of the motorcycle, the technological development of modern motorcycles and multiple requirements of users are met, and the technological progress and the product upgrading of the motorcycle industry are powerfully promoted.

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 purpose of the present invention is to achieve both the assurance of combustion stability in an internal combustion engine and the suppression of PN during operation in a catalyst warm-up mode accompanied by an ignition retard. A control device 150 is fora fuel injection device 101 which directly injects a fuel into a cylinder 615 of an internal combustion engine 10 operating in a catalyst warm-up mode for warming up a catalyst by using an ignition retard for retarding an ignition timing until an expansion stroke. The control device 150 performs the fuel injection immediately before the ignition timing in an expansion stroke among a plurality of fuel injections performed during one combustion cycle during the operation in the catalyst warm-up mode, and controls the fuel injection device 101 so that the injection amount of the fuel injection immediately before the ignition timing becomes smaller as the ignition timing is retarded.

Provided is an engine control device that suppresses the occurrence of a torque shock at the time of resuming from a fuel cut and suppresses deterioration of a combustion state. A control device for an engine mounted on a vehicle, the control device being provided with: an acquisition unit that acquires an engine speed and atmospheric pressure when there is a request to restore from a fuel cut; a recovery control unit that delays the ignition timing at the time of recovering from the fuel cut from the MBT ignition timing by a predetermined retardation amount and executes a recovery process for recovering from the fuel cut; and a retardation amount control unit that reduces the retardation amount as the engine rotation speed is higher, and increases the retardation amount as the atmospheric pressure is lower. The retardation amount control unit increases a reduction rate, which is a reduction amount of the retardation amount with respect to an increase in the engine rotation speed, as the atmospheric pressure is lower.

The invention relates to the field of power engineering. The present internal combustion engine comprises a housing in which a drum and a rotor are rotatably disposed. The rotor comprises a hollow shaft and an impeller wheel. The axis of rotation of the rotor is upwardly offset from the axis of rotation of the drum, the latter providing for the formation of an annular liquid seal by means of a working fluid during rotation. The impeller wheel is configured to be capable of forming alternating combustion and compression chambers. The hollow shaft has a stator arranged coaxially therein such that the cavity between the shaft and the stator can be divided into a fuel mixture supply zone and coolant supply and discharge zones. Mounted in the combustion chambers are spark plugs, each of which comes into contact with a capsule which is spring-loaded by a high-voltage contact and is fastened in a vertical upward position to the cylindrical surface of a rod arranged inside the hollow stator such as to permit regulation of the ignition timing. The rotor and the stator are configured with channels, baffles, ports and a plate, which provide for the supply and discharge of coolant to and from an annular cavity. The technical result is an increase in the efficiency and service life of the engine.

To stably obtain combustion timing of each cylinder in premixed compression ignition combustion using spark ignition in a multi-cylinder internal-combustion engine.SOLUTION: When there is difference between cylinders in θPmax showing combustion timing, the difference between cylinders is reduced by correcting an ignition timing (time t1-t2). When the difference between cylinders is reduced, the ignition timings of all cylinders are uniformly corrected so that the cylinder average θPmax approaches a target θPmax (time t2-t3). When an ignition timing correction amount reaches an upper limit / a lower limit, the cylinder average θPmax is made to approach the target θPmax by compression ratio correction by a variable compression ratio mechanism (time t3-t4). When the cylinder average θPmax reaches the target θPmax, compression ration is corrected so that the cylinder average ignition timing returns to a reference ignition timing (time t4-t5).SELECTED DRAWING: Figure 6

The present invention discloses a vehicle and its engine starting control method, device and crankshaft revolution acquisition method. The engine starting control method specifically includes: acquiring the crankshaft position signal of the engine; performing credibility analysis on the crankshaft position signal to obtain a credibility analysis result, the credibility analysis result at least including: the crankshaft signal is credible, the crankshaft signal is uncredible, and the crankshaft signal is converted from credible to uncredible; determining a target recognition strategy according to the credibility analysis result, and determining the number of crankshaft revolutions of the engine according to the target recognition strategy, the target recognition strategy and the credibility analysis result having a one-to-one correspondence; executing starting ignition control according to the number of crankshaft revolutions. The present invention improves the crankshaft position detection accuracy, optimizes the engine ignition and combustion timing, avoids ignition shock caused by improper ignition timing, and improves the starting noise reduction effect by formulating a crankshaft revolution identification strategy under different signal states.

The present application is to implement a temperature raising process for any one of a plurality of exhaust purification devices provided in an exhaust passage, without causing the temperature of other exhaust purification devices to excessively rise. An electronic control unit implements a temperature raising process for raising the temperature of a filter by delaying the ignition timing in an engine in which a catalyst and the filter are provided in an exhaust passage. Furthermore, the electronic control unit implements a prediction process for predicting a convergence value, i.e., a reaching temperature, of the temperature of the catalyst in the case where the engine is continued to be operated under the current operating conditions while the temperature raising process is implemented, and an adjustment process for adjusting the amount of delay of the ignition timing to the side of suppressing the temperature raising of the filter in the case where the reaching temperature predicted in the prediction process exceeds a predetermined upper limit temperature.

To suppress stall of an internal combustion engine due to rapid decline of speed of the internal combustion engine.SOLUTION: A control device for an internal combustion engine sets a target intake air amount and target ignition timing on the basis of target torque corresponding to request acceleration of a vehicle, predicts an increase of a load of power generation by a power generator coupled to a power transmission system for transmitting power from the internal combustion engine to a driving wheel and driven by output torque output from the internal combustion engine to generate electric power, sets an increase correction amount of an intake air amount on the basis of power generation torque used for driving the power generator when the increase of the load of the power generation by the power generator is predicted, sets a timing delay amount of the target ignition timing on the basis of a difference between the output torque of the internal combustion engine attained by the intake air amount after the increase amount correction and the target torque, and returns the target ignition timing to the timing advance side when rapid decline of the speed of the internal combustion engine occurs.SELECTED DRAWING: Figure 7

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.

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.

In an internal combustion engine equipped with a variable compression ratio mechanism, abnormal noises caused by combustion pressure in a specific low-load operating range are appropriately suppressed by controlling the advance angle limit of the ignition timing. [Solution] The noise suppression advance ignition limit value calculation unit 101 includes a map search unit 102, an advance ignition limit value selection unit 103, a change rate limit unit 104, a change rate limit determination unit 105, and a dummy value output unit 106. When the region determination unit 107 determines that the operating point is within the noise region, it outputs the noise suppression advance ignition limit value OPDADV via the select-low unit 110. The final ignition timing is limited to the retarded side of the MBT point by this advance ignition limit value. The map search unit 102 includes an advance ignition limit value map for each engine state label ETDST corresponding to the compression ratio. When the compression ratio is high, the ignition timing is limited to the retarded side even more.

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 provides a multi-pulse space trigger adjustable discharge method and device, and the method comprises the steps: a control module transmits a trigger signal to an ith discharge ignition module at an ignition time point of an ith exciter according to an ignition time sequence mode; and when the ith discharge ignition module receives the trigger signal, a rising edge pulse discharge signal is sent to the ith exciter, so that the ith exciter carries out ignition operation. By adjusting the ignition time sequence mode, the ignition time sequence of the multiple exciters can be flexibly controlled, different combustion chamber structures and working condition requirements are met, and the ignition efficiency is improved. Different distribution of the exciters in the space and combined use of multiple ignition modes can be overlapped to generate different ignition effects, the ignition reliability of the combustion chamber is further improved, and it is ensured that the engine can be successfully ignited under various complex conditions.

1. The name of this design product: motorcycle ignition timing assembly. 2. Application of this design product: used for motorcycle parts. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

To provide a control device that can execute backlash-reduction control at an appropriate timing.SOLUTION: A control device, which is mounted on a vehicle that is provided with a gear mechanism that transmits each power of an internal combustion engine and an electric motor to driving wheels, comprises: a determining part that determines success or failure of a stable state of operation of the internal combustion engine that is started, on the basis of rotation speed, an ignition time and an air-intake quantity of the internal combustion engine; and a control part that when the determining part determines that the stable state is established, starts backlash-reduction control of the gear mechanism using output torque of the electric motor.SELECTED DRAWING: Figure 2

An engine having a throttle valve, a filter for collecting an exhaust particulate matter from the engine, and a control device are provided, and the control device includes an acquisition unit for acquiring a temperature of the engine, a regeneration control unit for increasing an opening degree of the throttle valve as the temperature increases, and executing a regeneration control of the filter by a fuel cut. A vehicle comprising: a retard amount control unit that increases a retard amount of an ignition timing at a time of returning from the fuel cut as the temperature increases.

A control device for an internal combustion engine capable of performing ignition retardation control in which an ignition timing for igniting an air-fuel mixture in a combustion chamber is retarded from a normal operation. The device includes: an individual cylinder torque calculation unit that obtains a variation amount of combustion torque of each cylinder; an injection amount correction unit that corrects a fuel injection amount for each cylinder so as to reduce the variation amount of combustion torque of each cylinder obtained by the individual cylinder torque calculation unit; and a misfire determination unit that determines a misfire of a predetermined cylinder based on a combustion torque of the predetermined cylinder among the cylinders. When the combustion torque of any one of the cylinders is equal to or less than a predetermined torque, the injection amount correction unit does not correct the fuel injection amount for each cylinder.

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.

This invention discloses a low-emission combustion system and method for an ammonia engine with active control of dual reactive activity, comprising: an ammonia fuel engine and an electronic control unit. A jet ignition device and a liquid ammonia injector are disposed on the cylinder head of the ammonia fuel engine. The jet ignition device provides a jet ignition source to the main combustion chamber, and the liquid ammonia injector injects liquid ammonia fuel into the main combustion chamber. The electronic control unit is connected to the liquid ammonia injector, an air injector, a fuel injector, and a spark plug in the pre-combustion chamber, and is used to adjust the injection timing, number of injections, and injection quantity of the liquid ammonia injector based on at least one parameter among engine speed, load, cylinder pressure, intake state, and combustion phase, while simultaneously adjusting the air injection quantity, hydrogen injection quantity, and pre-combustion chamber ignition timing. The system actively controls the reactive activity within the combustion chamber through multiple injections of liquid ammonia, and simultaneously, through a control strategy, actively controls the combustion rate over a wide range.

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.

Methods for controlling the power of an engine, comprising: a) Detecting a first signal representing an ion current from an ion sensor that detects a combustion process in a cylinder of the engine; b) Calculating a knock score based on the first signal; c) Determining an operating state of the engine during the combustion process, preferably on the basis of a sensor detecting the operating state and / or a map describing the operating state, preferably on the basis of an engine map including an engine speed and an engine load during the combustion process; d) Determining an expected knocking intensity, which describes an acceptable intensity of a knocking process during the combustion process; e) Selecting one or more multipliers based on the operating state, where a multiplier is preferably at least one of: a. calculated from data provided by the sensor detecting the operating state, preferably the ion sensor and / or a fuel quality sensor and / or a temperature sensor and / or a contamination sensor, and b. selected from a table encompassing the characteristic map, preferably an engine characteristic map, preferably a characteristic map of speed and load; f) Calculate: a. a knock assist value based on the knock index and one or more multipliers, wherein preferably the knock index is multiplied by at least one of the multipliers, and / or b. a knock intensity aid value based on the expected knock intensity and one or more multipliers, wherein preferably at least one expected knock intensity is divided by at least one of the multipliers; g) Repeating steps a) to f) for at least two combustion processes, preferably at least 4 combustion processes, preferably at least 10 combustion processes, preferably at least 50 combustion processes; h) Comparing: a. the calculated tapping aid value with the expected tapping intensity, and / or b. the knock score with the knock intensity aid value, to determine a deviation, where the comparison includes comparing an average value of the knock index and / or the knock assist value and / or the knock intensity assist value over the repeated combustion cycles; and i) Generating an instruction to correct the operation of the engine, preferably to adjust ignition timing and / or fuel injection when the deviation exceeds a threshold indicating that a correction is required.

To appropriately burn an air-fuel mixture.SOLUTION: A control system S includes: a sensor 4 that is provided in an engine 2 using an air-fuel mixture of natural gas obtained through vaporization of liquefied natural gas containing methane and intake air, and detects a feature amount indicating a combustion state in a combustion chamber of the engine 2 at predetermined intervals; an acquisition section 721 that acquires the feature amount detected by the sensor 4 and a phase in a combustion cycle of the engine 2 corresponding to the feature amount while associating them with each other; a specification section 722 that specifies a maximum phase corresponding to a maximum value of an increase rate of the feature amount on the basis of the plurality of feature amounts detected in one combustion cycle and a phase associated with each of the feature amounts; and an ignition control section 723 that changes ignition timing to the air-fuel mixture so that the maximum phase falls within a predetermined range when the maximum phase is outside the predetermined range set as timing of causing the combustion in the combustion chamber.SELECTED DRAWING: Figure 1

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.

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.