101 results about "Ignition timing" patented technology

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 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.

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.

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 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).

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.

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.

In the present invention, a series hybrid vehicle includes: a power-generating motor generator (1) driven by an internal combustion engine (2); a drive motor generator (4); and a battery (5). The internal combustion engine (2) is provided with a turbocharger (11). When power generation by the internal combustion engine (2) is started due to a request to accelerate the vehicle, the ignition timing is retarded relatively further to the retarded side than a reference ignition timing in order to increase exhaust energy while the output of the battery (5) is used to perform accelerated driving for a length of time (t1 to t2) after the internal combustion engine (2) is started up. Boosting the rotational speed of the turbocharger (11) increases the output of the internal combustion engine (2) after the time (t2), yielding better acceleration performance.

To provide a control device of an internal combustion engine capable of restraining a variation in combustion pressure between cylinders.SOLUTION: A control device for a multi-cylinder engine capable of individually controlling an ignition timing and a fuel injection amount, the control device comprising: a generator configured to generate a reaction torque corresponding to a torque transmitted from the engine; and a resolver configured to detect a rotation angle of the generator, A combustion pressure of each of the cylinders is estimated according to a change in a rotation angle of the power generator detected by a resolver (step S3), a combustion pressure difference between the estimated combustion pressure and an ideal combustion pressure is calculated for each of the cylinders (step S4), and when all the combustion pressure differences are not within a predetermined range, ignition timings or fuel injection amounts of all the cylinders are uniformly corrected, and when any one of the combustion pressure differences is not within the predetermined range, ignition timings or fuel injection amounts of the cylinders having the combustion pressure difference that is not within the predetermined range are individually corrected (steps S8 and S10).SELECTED DRAWING: Figure 2

The control device is applied to a vehicle that transmits torque output from an internal combustion engine to drive wheels. The control device includes a processing circuit for controlling the internal combustion engine. The processing circuit executes ignition timing control, automatic stop control, and automatic start control. The ignition timing control is a control for repeating the adjustment of the ignition timing in accordance with the detection result of the knocking starting from the initial ignition timing at the engine start. The processing circuit terminates the ignition timing control when the engine rotational speed becomes equal to or lower than the first rotational speed greater than “0”.

1. Name of the designed product: LED ignition timing gun. 2. Use of the designed product: for checking and setting the ignition timing of automobile, agricultural and marine engines. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view 1.

To improve estimation accuracy of engine torque.SOLUTION: This engine torque estimating device 10 is provided with a CPU11 and a second memory 13. The second memory 13 stores mapping data DM that defines a mapping learned by machine learning. The mapping outputs an output variable corresponding to the engine torque when an input variable is input. The input variables include the engine speed NE, the intake air amount GA, the fuel flow rate FFR, and the ignition timing AIG. The CPU11 acquires an input variable and derives an engine torque estimated value TQ based on an output variable output from a mapping by inputting the acquired input variable to the mapping.SELECTED DRAWING: Figure 1

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 air inlet system of the engine comprises a throttle valve and an idle speed control valve, the idle speed control valve is provided with an air inlet and a plurality of air outlets, two air inlet pipes are communicated with the throttle valve, and the two air inlet pipes are communicated with air inlet channels of two air cylinders in a one-to-one correspondence mode. The plurality of air outlets are communicated with different positions of the air inlet pipe of the air cylinder with the short ignition time sequence; according to the air inlet system of the engine and the engine, the idle speed control valve is provided with the air outlets, the air outlets are all communicated with the air inlet pipe of the air cylinder with the short ignition time sequence, the air inlet amount can be distributed, and the probability that the cylinder body of the engine with the short ignition time sequence is on fire during idle speed is reduced.

The invention discloses a single-nozzle combustion stability evaluation method and a test system, and relates to the technical field of engines, and the method comprises the steps: determining the working time t1 of the single ignition operation of a single-nozzle combustion stability test device according to the moment when the combustion of an engine is unstable; determining a single ignition time sequence according to the working time t1; a plurality of groups of mixing percentages with different percentage values are set, a plurality of groups of working condition percentages with different percentage values are set, the group number of the mixing percentages and the group number of the working condition percentages are the same, and under the condition that one group is selected from the plurality of groups of mixing percentages and the plurality of groups of working condition percentages, a combustion stability test is carried out according to a single ignition time sequence. And testing the combustion stability until each group of the mixing percentage and the working condition percentage is subjected to the combustion stability test, and recording the percentage of the number of times of generating the excitation combustion instability in the number of times of all the combustion stability tests. And transversely comparing the stability of different nozzles by taking the percentage of the combustion instability problem in the test matrix as a quantitative index.

The invention relates to a method for operating a charging system for an internal combustion engine by means of a boost pressure control system during a shifting operation of a transmission operatively connected to the internal combustion engine, wherein the charging system comprises a charging stage with a compressor and a drive. A target operating condition, in particular a torque to be generated by the internal combustion engine, is detected. A target boost pressure is derived from the target operating condition. The charging system is adjusted to achieve the target boost pressure by means of the boost pressure control system, wherein the boost pressure control system includes a feedforward control that takes into account ignition timing adjustment and / or cylinder deactivation to achieve the target operating condition.Furthermore, a control system for a charging system for an internal combustion engine, an internal combustion engine with a charging system, and a motor vehicle with an internal combustion engine are described.

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.

This internal combustion engine (1) has a GPF (4), and regenerates the GPF (4) by removing captured exhaust microparticles by combustion. The GPF (4) is regenerated in a temperature-increasing mode for increasing the temperature of the GPF (4), and in a motoring mode for motoring the internal combustion engine (1) and supplying air to the GPF (4). The temperature-increasing mode includes a first temperature-increasing mode for increasing the temperature of the GPF (4) by retarding the ignition timing of the internal combustion engine (1), a second temperature-increasing mode for increasing the temperature of the GPF (4) by increasing the engine speed of the internal combustion engine (1), and a third temperature-increasing mode for increasing the temperature of the GPF (4) by increasing the torque of the internal combustion engine (1). If implementation of the temperature-increasing mode is confirmed and implementation of the motoring mode is confirmed, regeneration of the GPF (4) is determined to be feasible.

Device comprising: a filter circuit (144) configured to filter vibration data within a predetermined combustion period of the machine, wherein the vibration data represent a vibration of an internal combustion engine (110), the vibration data comprising voltage signals; a PCP determination circuit (146) which is functionally and communicatively connected to the filter circuit (144) and is configured to determine a cylinder peak pressure (PCP) of a combustion cycle of the internal combustion engine (110) on the basis of the filtered vibration data, wherein the PCP corresponds to a maximum of absolute values ​​of the voltage signals or a difference between the maximum and a minimum of the absolute values ​​of the voltage signals; an LPP determination circuit (148) which is functionally and communicatively connected to the filter circuit (144) and configured to determine a location of the cylinder peak pressure (LPP) of the combustion cycle of the internal combustion engine (110) based on the filtered vibration data, wherein the PCP and the LPP represent a functional property of the combustion cycle; and an ignition timing circuit which is functionally and communicatively connected to the PCP determination circuit and the LPP determination circuit, wherein the ignition timing circuit is configured to modify an ignition timing of the internal combustion engine on the basis of the determined PCP and the determined LPP.