68results about "Mechanical control" patented technology

The invention discloses a ship engine control system, and relates to the technical field of engine control. A ship engine control system comprises a data processing module, a data prediction module, a decision optimization module, a parameter generation module and a control execution module. According to the invention, a plurality of disturbance prediction parameters such as surge arrival time, environment temperature change, port congestion, pitching and rolling change trend, wave period and countercurrent intensity change trend are fused in the data prediction module, and a disturbance arrival time window and an intensity level are calculated, so that potential navigation disturbance is identified in advance; and a basis is provided for feed-forward adjustment of power distribution and combustion control, so that active intervention is realized before disturbance occurs.

The invention provides an excavator engine rotating speed optimizing method based on a particle swarm algorithm, an excavator rotating speed adjusting method, electronic equipment and a storage medium, and belongs to the technical field of engine control. According to the scheme, the method comprises the steps that operation parameter sets of an excavator in different working stages in the excavation circulation process are obtained; according to the operation parameter set of each working stage, initial three-dimensional particles corresponding to the working stage are set, and initialization processing of a particle swarm algorithm is carried out; an evaluation function is constructed according to the fuel consumption rate of the engine, the anti-load capacity of the whole vehicle, the volumetric efficiency of the two hydraulic pumps and the constant flow proportion of the two hydraulic pumps, and an initial global optimal solution of each working stage is obtained through calculation; and performing iterative optimization of an initial global optimal solution on each working stage based on a particle swarm algorithm. According to the excavator engine rotating speed optimization method based on the particle swarm optimization, the rotating speed displacement point with the best economical efficiency can be optimized.

The invention relates to the field of automobile driving, and provides an engine control method and system and electronic equipment. The method comprises the following steps of S1, detecting whether a vehicle is in a reverse towing working condition or not; s2, if the vehicle is in the reverse towing working condition, operation information of a current engine is obtained; the operation information at least comprises an engine fuel oil way state, a gearbox gear shifting state and an engine braking state; s3, based on the engine operation information, whether the vehicle meets a first preset condition or not is judged; and S4, if the vehicle meets the first preset condition, an economic reverse towing control strategy is triggered so as to control the vehicle to run in an economic reverse towing mode. Compared with the prior art, the negative torque of the engine can be effectively reduced under the reverse towing working condition, and the coasting distance of the vehicle is increased.

The invention discloses an equipment rotating speed control method and system based on load calculation, and relates to the technical field of combustion engine control, and the method comprises the steps: connecting a load monitoring platform to obtain a load amount, and calculating a load rotating speed demand; the method comprises the following steps: analyzing a single-cylinder methanol engine rotating speed relation network, establishing a network diagram structure, training an adaptive search space based on the structure, extracting relation parameters, and constructing an optimization space; adjusting and calculating according to the load rotating speed demand and the actual rotating speed to obtain an adjusted rotating speed difference; the current control parameters are obtained through the control unit, the control parameters and the adjustment rotating speed difference are used as constraints, fuel consumption and rotating speed stability are optimized, and an optimal control strategy is obtained. The technical problems that in the prior art, a traditional single-cylinder methanol engine is insufficient in rotating speed control precision, large in rotating speed fluctuation and high in fuel consumption are solved, and the technical effects that the rotating speed control precision and stability are improved and the fuel consumption is reduced through self-adaptive control optimization are achieved.

The invention relates to the technical field of generators, in particular to a small generator set control system and method. The small generator set control system comprises a control module, a power piece and a generator. The control module is electrically connected with the power part, the generator and the output end of the generator, and the control module can receive an external control signal; the power piece is connected with the generator, the output end of the generator can supply power to the load, the functions of overload protection, automatic idling, working frequency switching, power generation switch control and the like can be achieved only through one control module without a circuit breaker, the integration degree is high, and stability is good.

The embodiment of the invention discloses a vehicle control method and device, and the method comprises the steps: determining that a vehicle needs to enter a torque limiting mode when the actual input torque and the limit input torque of a differential mechanism of the vehicle meet a first condition; the maximum output torque of the engine is calculated according to the limit input torque, the inertia torque of the engine, torque increase of a hydraulic torque converter, torque loss of an oil pump and torque conversion parameters between a differential mechanism and a transmission, the input end of the hydraulic torque converter is connected with the output end of the engine, and the output end of the transmission is connected with the input end of the differential mechanism; the input end of the transmission is connected with the output end of the hydraulic torque converter, the input end of the oil pump is connected with the input end of the hydraulic torque converter, and the engine controller can limit the torque of an engine according to the maximum output torque by sending a torque limiting request including the maximum output torque to the engine controller. Therefore, the output torque of the engine is accurately controlled, and the differential is protected.

A fuel-air mixture of a fuel gas and air is combusted in a combustion chamber in a gas mode of a marine dual fuel engine (1). When power of the engine (1) is increased, power is calculated by a control unit (22) from data on a rotational speed and a torque measured by a rotational speed sensor (20) and a torque sensor (21) of a crankshaft (2). Advance of an opening / closing timing of an intake valve (8) is set from a first map (24) and a second map (25) on the basis of the data on the rotational speed and the power. A second electric signal of the opening / closing timing is converted into a pressure by an electropneumatic converter (27) and adjusts a movement amount of a rod using an actuator (28). A variable intake valve timing mechanism (30) is operated on the basis of the movement amount of the rod to adjust the opening / closing timing of the intake valve (8) by advancing the opening / closing timing of the intake valve (8), and control of lowering a compression ratio of a fuel-air mixture is performed. A power-up speed can be increased while preventing knocking by setting advance amount of the opening / closing timing of the intake valve (8) using the first map and the second map in which the advance amount is previously determined.

The present disclosure provides a method and system for operating an engine. The system and method for operating an engine including a compression ratio connecting rod for adjusting the engine's compression ratio are described. The system and method provide different ways to diagnose the presence or absence of engine misfire in response to engine operating regions that may be more or less susceptible to torsional engine crankshaft vibration. In one example, engine misfire may be determined in response to a force applied to the engine's compression ratio changing connecting rod.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine and compensating the injection amount of the gas fuel according to the cylinder body temperature signal of the engine. The temperature sensor is used for monitoring the temperature of the cylinder body of the engine in real time, the injection amount of the gas fuel is compensated according to the temperature of the cylinder body of the engine, and the combustion condition in the engine heating process of the engine is stabilized.

A piston for an internal combustion engine operable on a gaseous fuel is provided. The piston has a piston top end comprising a piston bowl for receiving at least one gaseous fuel jet from a fuel injector of the ICE, said piston bowl having a bottom section and a circumferential side section extending in an axial direction between the bottom section and a piston top end surface, wherein said bottom section comprises a protrusion segment configured to guide said at least one gaseous fuel jet. The protrusion segment further extends between spaced apart regions of the circumferential side section.

The invention relates to a control method and device for restraining engine rotating speed fluctuation, electronic equipment and a vehicle. The control method comprises the steps that the ignition moment and the output request torque of an engine are obtained; based on the output request torque, acquiring an output compensation torque of the generator by using a first association relationship; and based on the output compensation torque, the generator is controlled to compensate the reverse torque output by the generator from the ignition moment. The ignition moment and the output request torque of the engine are directly obtained through the generator, the output compensation torque of the generator is obtained according to the output request torque, and the generator can compensate the reverse torque to be output by the generator through the output request torque from the ignition moment of the engine; therefore, the generator does not need to output the reverse torque to the engine after multiple times of information transmission after the engine generates the rotation speed fluctuation, and the problem of delay in rotation speed fluctuation suppression control is solved.

The present disclosure relates to an internal combustion engine (ICE) system (10) comprising: an internal combustion engine (20); a turbocharger arrangement (26), the turbocharger arrangement (26) having a turbine (27) arranged in an exhaust gas conduit (24), the exhaust gas conduit extending between the internal combustion engine (20) and the turbine (27), and further a compressor (28) disposed in an inlet manifold (23), the inlet manifold extending between the compressor and the internal combustion engine, the compressor being configured to be connected to the turbine via a shaft (29); a controllable backpressure valve (25) being located in the exhaust gas conduit, the controllable backpressure valve being configured to control the pressure within the exhaust gas conduit; a pressure sensor (30, 32) disposed in the exhaust gas conduit, and further in-between the controllable backpressure valve and the turbine, the pressure sensor being configured to measure an exhaust gas pressure downstream the controllable backpressure valve; a speed sensor (35) configured to measure a compressor speed; and a control system (90) for determining an operational status of the pressure sensor.

A work vehicle engine control system operable in an enhanced engine protection (EP) mode and associated methods and program products, including a memory storing a first default power curve having a first curve shape as presented on a power / speed graph, the power / speed graph plotting power output and engine speed along a vertical axis and a horizontal axis, respectively. A controller architecture is connected to the memory and operable in the enhanced EP mode, wherein the controller architecture: (i) generates a first dynamically adjusted power curve by repeatedly fitting the first curve shape below a moving EP upper limit as presented on the power / speed graph; (ii) determines a power output target (PO ) corresponding to a current speed of the work vehicle engine using the first dynamically adjusted power curve; and (iii) determines a power output target (PO ) corresponding to a current speed of the work vehicle engine. TAR ); and (iii) according to the power output target (PO TAR ) Dispatching vehicle engine power output.

The present invention addresses the problem of starting an intermittent stop as soon as possible within a range in which emission deterioration can be suppressed. An electronic control unit for controlling an engine in which an exhaust purification catalyst is provided in an exhaust passage is configured so as to: determine whether or not the amount of a control substance in exhaust discharged to outside air is large during a catalyst warm-up period until warm-up of the exhaust purification catalyst is completed; when it is determined that the engine is not in a state in which the amount of the control material is large, intermittent stop of the engine is permitted earlier than when it is determined that the engine is in a state in which the amount of the control material is large.

Methods for a turbocharged engine, comprising: Adjusting a pressure surge line of a compressor map during vehicle operation as a function of vehicle speed.

The present subject matter relates to a method and control device for reducing unburned hydrocarbon and particulate emissions of an internal combustion engine, especially at cold engine conditions. The problem to be solved is to provide an automatic generation of injection profiles taking into account the requirements of different combustion modes at different operating points of the internal combustion engine. The automatic generation of an injection profile is accomplished by controlling fuel injection with an injection profile including a plurality of fuel injections, the profile being generated by setting an injection signal to a positive value at predetermined times in an injection cycle when a calculated spray penetration length is less than or equal to a spray penetration length threshold, and resetting the injection signal to zero at predetermined times in an injection cycle when a calculated spray penetration length exceeds a spray penetration length threshold, until a fuel quantity calculated based on a previously generated fuel injection profile exceeds a predetermined fuel quantity.

The present application discloses a method, device, electronic equipment and engineering machinery for dynamic power matching. The method comprises: obtaining the target speed and actual speed of the engine, and determining the target acceleration of the engine according to the speed regulation characteristic curve, and determining the actual acceleration of the engine according to the actual speed. Furthermore, the speed closed-loop output value is determined according to the target speed and the actual speed, and the acceleration closed-loop output value is determined according to the actual acceleration and the target acceleration, so as to control the required flow of the pump according to the speed closed-loop output value and the acceleration closed-loop output value. The present application can improve the efficiency of matching the power of the engine and the pump of the engineering machinery under dynamic load, and reduce abnormal phenomena such as speed drop and flameout caused by engine response lag.

According to the range extender shutdown control method, device and equipment provided by the embodiment of the invention, the actual position of the vehicle engine piston is obtained in real time in response to the starting and shutdown process of the vehicle range extender, and the stroke of the engine piston and the preset shutdown position corresponding to the current stroke are determined; and determining a first control parameter based on the actual position of the engine piston and the preset stop position, and controlling the engine piston to stop at the preset stop position based on a proportional-integral (PI) control algorithm and the first control parameter. Each stroke is provided with the corresponding preset stop position, the engine piston can be controlled to accurately rotate to the preset stop position to stop based on the proportional-integral control algorithm, vibration and noise generated when the range extender is started next time can be effectively weakened, and the driving experience of a user is improved.

This control device for controlling a high-pressure fuel pump (103) is provided with: a plunger operation determination unit (801); a fuel-pressure rising evaluation unit (802); a closing valve determination unit (803); and an ejection amount control unit (804) that controls a current application start timing for a solenoid (205) on the basis of a fuel pressure measured by the fuel-pressure sensor (401) and a target fuel pressure to control an ejection amount of fuel. The ejection amount control unit (804) determines a control gain of the current application start timing on the basis of a determination result of the closing valve determination unit (803).

The invention discloses an engine control method, a controller, a vehicle, a medium and a product, the working state of an engine of target equipment is controlled according to the allowable charging power of a battery of the target equipment and / or the recovery power of a driving motor of the target equipment, so that the engine operates at a stable rotating speed, and the working efficiency of the engine is improved. Jitter and pause of the target equipment can be reduced, the use experience of the target equipment is improved, and the safety is improved.

To satisfy both a request for ensuring worker's safety at the engine start and a worker's request for promptly starting a work, on the premise of a working machine including an engine RPM suppression mode. A working machine (1) has a centrifugal clutch (6). The engine RPM suppression mode is executed at the start of an internal combustion engine (2). With the RPM suppression mode, the RPM of the internal combustion engine (2) is controlled not to exceed a clutch-in RPM. The working machine (1) has a mode cancelling means (S5) canceling the engine RPM suppression mode when a predetermined mode cancelation condition for cancelling the engine RPM suppression mode is satisfied, and a cancellation condition changing means (S2) changing the mode cancelation condition depending on a change in an engine operational state and / or an environment.

The invention provides an engine torque control method and device, a vehicle, electronic equipment and a storage medium. The method comprises the steps that the rotating speed and torque of an engine when roars exist in a running vehicle are obtained; determining the speed regulation range of the rotating speed of the engine; adjusting the torque of the engine within the speed regulation range to obtain a target torque of the engine when no roar exists in the vehicle; and controlling the torque of the engine to run according to the target torque. In the embodiment of the invention, the speed regulation range of the rotating speed of the engine is determined based on the rotating speed of the engine when roars exist in the vehicle, and the torque of the engine in the speed regulation range is regulated until no roars exist in the vehicle, namely, the resonant frequency of the vehicle body is avoided by regulating the rotating speed of the engine; the problem of roar in the vehicle is solved, and the comfort level of the whole vehicle is improved.

The present application discloses an engine control method, a controller, a vehicle, a medium and a product. By controlling the operating state of the engine of a target device according to the allowed charging power of the battery of the target device and / or the recovery power of the drive motor of the target device, the engine is operated at a stable speed, which can reduce the jitter and stall of the target device, improve the user experience of the target device and enhance the safety.

The invention relates to the technical field of automobile driving, and discloses a vehicle engine control method and device, a vehicle and a storage medium. The method comprises the steps that a frequency response interval is obtained, and the frequency response interval is obtained by conducting a frequency response test on a vehicle steering wheel in advance; calculating to obtain a resonance rotating speed interval corresponding to the frequency response interval; and in the vehicle running process, the rotating speed corresponding to the second order of the engine is controlled to avoid the resonance rotating speed interval. Therefore, by calculating the resonance rotating speed interval of the steering wheel and the engine, the rotating speed corresponding to the second order of the engine is controlled to avoid the resonance rotating speed interval, so that the resonance problem between the steering wheel and the engine is solved, and the resonance of the steering wheel is avoided.

Procedure, comprehensive: Mechanically varying the compression ratio of an engine by means of a variable compression ratio mechanism; and In response to the deteriorating mechanism, limiting the engine load.

The invention provides a diesel generating set and a control method thereof, a rated rotating speed correction unit determines a target rated rotating speed according to a load change estimated value and a standard rated rotating speed when a liability of the diesel generating set changes, and transmits the target rated rotating speed to a central control unit; the rotating speed sensor monitors the rotating speed of a flywheel in the diesel generating set and transmits the rotating speed of the flywheel to the central control unit; and the central control unit outputs corresponding excitation current to the oil injection control unit according to the target rated rotating speed and the flywheel rotating speed. The target rated rotating speed is adjusted in advance on the basis of the load change estimated value, and the rotating speed set change condition is ahead of the change of the actual load, so that the transient process of suddenly loading / unloading the load of the generator set can be matched when the rotating speed of the diesel engine is actually increased / reduced, and the advanced rotating speed control of suddenly loading / unloading the load of the generator set is realized; and the transient frequency adjustment rate and the stable time index of the generator set are improved.

To provide a variable compression ratio (VCR) engine with more continuous performance and with less need for maintenance than in the prior art.SOLUTION: The invention relates to a variable compression ratio (VCR) engine and a method for driving the variable compression ratio (VCR) engine. The variable compression ratio (VCR) engine 1 comprises at least one cylinder 2 with a piston 3 movably arranged therein and adapted to perform a predefined piston stroke, and a setting unit 4 for setting a preset compression ratio by setting a preset clearance position 11. The VCR engine 1 further comprises a control unit 5 for setting at least one temporal clearance 15 position different from the preset clearance position 11 and for inducing at least one piston movement with the temporal clearance position 15.SELECTED DRAWING: Figure 1

The invention discloses a free piston type internal combustion power generation system motion control method and device based on a track, equipment and a medium, and relates to the field of free piston type internal combustion power generation systems.The method comprises the steps that the operation state of a free piston type internal combustion power generation system is determined according to operation parameters of the free piston type internal combustion power generation system; determining reference trajectories of the free piston type internal combustion power generation system in different operation states; a double-loop motion control structure is adopted to track the reference track, and a reference voltage vector is determined; and the reference voltage vector is modulated into a duty ratio signal through a space vector pulse width modulation algorithm, and the free piston type internal combustion power generation system is controlled to move. According to the invention, the track of the piston can be controlled, and the stability of the FPLG system is improved.

The present disclosure relates to an internal combustion engine (ICE) system comprising: an internal combustion engine; a turbocharger arrangement, the turbocharger arrangement having a turbine arranged in an exhaust gas conduit, the exhaust gas conduit extending between the internal combustion engine and the turbine, and further a compressor disposed in an inlet manifold, the inlet manifold extending between the compressor and the internal combustion engine; a controllable backpressure valve being located in the exhaust gas conduit, the controllable backpressure valve being configured to control the pressure within the exhaust gas conduit; a pressure sensor disposed in the exhaust gas conduit, and further in-between the controllable backpressure valve and the turbine, the pressure sensor being configured to measure an exhaust gas pressure downstream the controllable backpressure valve; a speed sensor configured to measure a compressor speed; and a control system for determining an operational status of the pressure sensor.