170 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

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.

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

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.

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.

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.

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.

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.

The present invention provides control to switch between fuel mixing and non-fuel mixing during engine operation, while continuing a stable engine operation. This control device is an engine control device and comprises: a means for determining whether or not to perform co-combustion control using a mixed fuel, which is obtained by mixing a plurality of fuels, when the engine is in operation; a means for controlling ignition timing of the engine; and a means for performing air-fuel ratio control in a combustion chamber of the engine. When the determination means determines to perform the co-combustion control, the means for controlling ignition timing starts retard control of the ignition timing before supply of the mixed fuel is started, and completes the retard control before the supply of the mixed fuel is started. When the supply of the mixed fuel is started, the means for performing the air-fuel ratio control performs the air-fuel ratio control with a target air-fuel ratio corresponding to a mixing ratio indicating the ratio of each of the plurality of fuels in the mixed fuel.

The present invention provides a vehicle control device that can suppress vibrations of the vehicle body when the internal combustion engine restarts, even if a restart request occurs before the engine speed of the internal combustion engine reaches "0". [Solution] The control device is applied to a vehicle that transmits torque output from an internal combustion engine to the drive wheels. The control device includes a processing circuit that controls the internal combustion engine. The processing circuit performs ignition timing control, automatic stop control, and automatic start control. Ignition timing control is a control that starts from the initial ignition timing when the engine starts and repeatedly adjusts the ignition timing according to the knock detection result. The processing circuit terminates the ignition timing control (step S13) when the engine rotational speed NE becomes less than or equal to a first rotational speed NE1 which is greater than "0" (step S12: YES).

To enable application of an ignition timing retard of the longest possible amount of time within a range in which thermal deterioration of exhaust purification catalyst can be avoided in response to a torque down requirement from an automatic transmission side.SOLUTION: In an up-shift change of a stepwise automatic transmission, an AT controller outputs a torque down requirement to an engine controller. The engine controller is equipped with a map that allocates torque down continuation-possible times TD with a load on an internal combustion engine and a revolution speed thereof as parameters, and determines a torque down continuation-possible time TD on the basis of the load and revolution speed at the time of input of the torque down requirement. If the torque down continuation-possible time TD elapses before a torque down requirement signal is turned Off, ignition timing retard ends.SELECTED DRAWING: Figure 3

The present application relates to a kind of low-orbit giant constellation networking orbit control strategy methods, comprising the following steps: S1: according to last group of orbit control ignition timing, GNSS telemetry and ground measured orbit data, constellation key parameter calibration and forecast are carried out;S2: according to the calibration result calculated in step S1 and nominal constellation configuration parameter, constellation networking stage is independently judged, and orbit control strategy is generated;S3: according to the control strategy generated in step S2, the constellation configuration evolution of a period of time in the future is calculated, and the control strategy is verified.The advantage is that it is suitable for the low-orbit giant constellation networking task configured with electric propulsion, and meets the existing giant constellation orbit control task demand.

Method for controlling an internal combustion engine, comprising the following steps: - Supplying fuel to a combustion chamber of the internal combustion engine; - Ignition of the fuel in the combustion chamber; and - Detect that the internal combustion engine should deliver a higher actual power output (14; 24); - Shifting the ignition timing to a later time (34) compared to the ignition timing (32, 36) at a static power demand (12, 16) when it is detected that the internal combustion engine is to deliver a higher actual power; characterized in that the step of shifting the ignition timing to a later time (34) compared to the ignition timing at a static power demand (32, 36) is only carried out at a predetermined speed.

To prevent a drop in rotation speed of an internal combustion engine or a shock from occurring when torque reserve control is executed in the state where an exhaust gas recirculation system is in operation.SOLUTION: A vehicle control device (100) executes a torque reserve control including retarding the ignition timing of an internal combustion engine (1). The vehicle control device comprises: required torque acquisition means (101, 111) for acquiring required torque; determination means (103, 114) for determining whether or not reserve torque corresponding to the required torque can be secured in the state that an exhaust gas recirculation system that returns exhaust gas from an exhaust path to an intake path of the internal combustion engine (1) is operated; and limiting means (104, 115) for limiting the operation of the exhaust gas recirculation system when the determination means (103, 114) determines that the reserve torque corresponding to the required torque cannot be secured.SELECTED DRAWING: Figure 2

To improve shaft output (improve thermal efficiency) by simple control while sufficiently reducing energy supply related to reforming of ammonia when ammonia and hydrogen obtained by reforming a part of the ammonia are used as fuel gas.SOLUTION: An engine system includes: a control device R for controlling an operation; a reformer RF for reforming a part of ammonia N to generate a reformed gas K containing a combustion-accelerating gas having a high combustion rate; and a temperature adjustment unit L4b for combusting the ammonia N and the reformed gas K generated by the reformer RF together with a combustion air A2 in a combustion chamber, and adjusting a temperature of the reformer RF using an exhaust gas E from the combustion chamber. The control device R performs ignition timing control for retarding an ignition timing when performing output increase control for increasing shaft output, and advancing the ignition timing when performing output reduction control for reducing shaft output.SELECTED DRAWING: Figure 1

The present application relates to the technical field of internal combustion engine, and the present disclosure provides a kind of combustion system, including body;Piston, installation is in body;Cylinder cover, installation is in the opening position of body, cylinder cover, body and piston define first combustion chamber;First combustion part, is set in the middle position of cylinder cover to be used to inject fuel into first combustion chamber;Second combustion part, is set in the position of cylinder cover and is located in the side of first combustion part and is communicated with first combustion chamber, second combustion part includes: second combustion chamber, is formed in cylinder cover, the fuel of second combustion chamber is combusted prior to the fuel of first combustion chamber;Jet hole, is formed in the surface of cylinder cover opposite to piston, to form jet flame and ignite the fuel beam formed by the fuel in first combustion chamber.The present disclosure also provides an engine including combustion system, monitoring unit and control unit.And a kind of combustion control method of engine, including according to the position of the piston of engine, control the ignition timing of spark plug and the timing of injection to form coordination.

The invention discloses a road van plateau whole vehicle transient calibration development method which comprises the following steps: S101, detecting the altitude in real time, and triggering a plateau mode; s102, an accelerator signal is input into an acceleration manager after being subjected to Kalman filtering; s103, generating a target torque in combination with the intention of the driver and the vehicle dynamics constraint; s104, the anti-shake module performs moving average filtering on the torque instruction; and S105, the MPC controller dynamically adjusts the fuel injection pulse width and the ignition timing, and smooth torque output is achieved. Steering wheel turning angle data are introduced into an accelerator filtering decision for the first time, and mistaken acceleration under the steering working condition is avoided; the balance performance and efficiency are calibrated through high load and low load, the high load preferentially keeps power, and the low load preferentially saves oil.