322results about "Speed sensing governors" patented technology

The invention provides an engine shutdown method, device and equipment and a storage medium, the engine rotating speed is controlled to reach the shutdown target rotating speed in a closed-loop mode based on an integrated starter generator ISG, the engine torque is adjusted to be the target torque, and the engine after torque unloading is obtained; calculating a feed-forward torque according to the target shutdown rotation speed and an expected change rate of the target shutdown rotation speed; and based on the feedforward torque, the rotating speed of the engine after torque unloading is reduced to zero from the shutdown target rotating speed. In the application, the torque of the engine is unloaded based on the ISG, and the rotating speed of the engine after the torque is unloaded is controlled to be reduced to zero according to the expected change rate of the rotating speed based on the feed-forward torque, so that the jittering of the engine in the shutdown process can be effectively relieved, and the driving experience feeling of a user is further improved.

An agricultural harvesting system includes a control system. The control system identifies a predictive value of a power characteristic based on a relationship between the power characteristic and a characteristic. The control system generates a control signal to control a controllable subsystem of a mobile hybrid agricultural harvesting machine based on the predictive value of the power characteristic.

A diesel engine control method and device combining feedback based on the LSTM algorithm and PID, which relates to the technical field of diesel engine speed control. The technical problem to be solved is "how to provide a diesel engine control method that can be applied to the initial state and has high accuracy". The method includes: collecting diesel engine parameters; inputting the diesel engine parameters into the LSTM network for iterative training until a predicted speed that meets the preset requirements is obtained; taking the difference between the predicted speed that meets the preset requirements and the actual speed at the previous moment and inputting it into the PID network to obtain the optimal speed. This method uses the LSTM algorithm for prediction in the feedback link and jointly obtains the optimal speed with the PID control algorithm to control the diesel engine, which can be applied to diesel engines in the initial state and has high control efficiency and accuracy.

A closed-loop control device, for closed-loop control of a power assembly including an internal combustion engine and a generator having an operative drive connection to the internal combustion engine, includes: the closed-loop control device which is configured for: detecting a generator power (PG) of the generator as a controlled variable; determining a control deviation (eP) as a difference between the generator power (PG) which is detected and a target generator power (Psoll); determining a target speed (nsoll) as a manipulated variable for controlling the internal combustion engine as a function of the control deviation (eP); using a control rule for determining the target speed (nsoll); and being operatively connected to an open-loop control device of the internal combustion engine in such a way that the target speed (nsoll) can be transmitted by the closed-loop control device to the open-loop control device.

A closed-loop control device, for closed-loop control of a power assembly including an internal combustion engine and a generator having an operative drive connection to the internal combustion engine, includes:the closed-loop control device which is configured, in a first functional state, for:detecting a generator frequency (fG) of the generator as a controlled variable;determining a control deviation (ef) as a difference between the generator frequency (fG) which is detected and a target generator frequency fsoll);determining a target speed (nsoll) as a manipulated variable for controlling the internal combustion engine as a function of the control deviation (ef);using a control rule for determining the target speed (nsoll); andbeing operatively connected to an open-loop control device of the internal combustion engine in such a way that the target speed (nsoll) can be transmitted by the closed-loop control device to an open-loop control device.

The engine device including a multi-fuel engine that is operated by burning a main fuel including a low GHG fuel, which emits less greenhouse gas than a petroleum-based fuel, and a hydrocarbon-based auxiliary fuel includes a main fuel injection unit of a fuel injection unit, which injects the main fuel by electric control, an auxiliary fuel injection unit of the fuel injection unit, which injects the auxiliary fuel by mechanical control, and a control device that electrically controls at least one of the injection volume, injection pressure, injection timing, and injection frequency of the main fuel by the main fuel injection unit. The control device controls the rotation speed of the multi-fuel engine at the time of idle operation.

The invention discloses an engine operation control method, device and system and a storage medium, and relates to the technical field of engines, the method comprises the steps that gear shifting control parameters sent by a transmission control unit are received, target parameters are obtained, and the target parameters comprise the final target rotating speed; the gear shifting control parameters comprise the real-time rotating speed of an engine; according to the gear shifting control parameters and the target parameters, whether a gear shifting synchronization stage of the current vehicle is started or not is judged; and if the gear shifting synchronization stage is started, the current target rotating speed of the engine is dynamically adjusted according to the gear shifting control parameters till the real-time rotating speed of the engine reaches the final target rotating speed. By dynamically adjusting the target rotating speed of the engine, adjustment of the rotating speed of the engine in the gear shifting process is optimized, smoothness of the vehicle in the gear shifting process is ensured, and impact and vibration in the gear shifting process are reduced.

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 discloses an automobile engine multi-mode electronic control system and a control method thereof, and particularly relates to the technical field of automobile engine multi-mode electronic control, the system comprises a sensor module, a mode switching module, an execution control module and a diagnosis module, the sensor module collects parameters such as rotating speed and air inlet pressure in real time; the mode switching module judges four working conditions of idling, cruising, accelerating and pressurizing based on threshold logic; the execution control module calls strategies such as PID (Proportion Integration Differentiation) control and EGR (Exhaust Gas Recirculation) rate calculation aiming at different modes to realize accurate adjustment of parameters such as throttle opening and boost pressure; the diagnosis module monitors faults of the sensor and the actuator in real time through voltage out-of-limit detection, position deviation comparison and temperature correlation analysis.

The present disclosure relates to an air intake module (100) which includes a first sensor (10) for continuously monitoring air temperature and pressure at the intake manifold and generating a first sensed signal. The module comprises a float chamber (22) supplying fuel to a housing (12), which includes a first channel (13) with an air inlet (14) and an outlet (15) delivering an air-fuel mixture to the engine. A second channel (105) and a third channel (107) within the housing facilitate air passage. A throttle slide (51), positioned within the first channel, regulates airflow. A second sensor (108) detects the throttle slide (51) position and generates a second sensed signal. A control unit (134) processes sensed signals and generates an actuating signal. An IACV (146) with a plunger (111) adjusts airflow between the second channel and the third channel in response to the actuating signal, enabling air bypass during idle or low-load conditions.

The present invention provides a control system for a power generation system, comprising a generator coupled to a turbine via a shaft. The control system includes a memory storing instructions. The control system also includes a processor coupled to the memory and configured to execute the instructions. When the instructions are executed, the processor receives a direct current (DC) bus voltage from an automatic voltage regulator (AVR), wherein the AVR is configured to control the voltage characteristics of the generator and determine the speed of the generator based on the DC bus voltage.

Techniques are disclosed herein that provide for controlling torque in a vehicle. In some embodiments, desired torque values are generated and are compared to an amount of torque currently being generated by an engine. If a different amount of torque is desired, an engine speed target is altered in a linear fashion, and then converted back to a torque request to be provided to an engine ECU for implementation. Techniques disclosed herein may cause changes in torque demand to be limited in such a way to cause predictable and smooth changes in engine speed, even when engine speed and torque do not have a linear relationship to each other.

A control device (125) for controlling an engine (102) of a vehicle (103) is disclosed together with a control system (101) comprising a control device (125), a vehicle (103), and a method (200, 500). The control device (125) comprises a control unit configured to cause the power generation of the engine (102) to shut down during movement of the vehicle (103) depending on at least one criterion being met, and to cause the power generation of the engine (102) to restart depending on at least one input signal indicating a need to restart the engine (102) to provide a required power output.The control unit is also configured to receive a target motor speed value that depends on a current drive shaft speed, and causes the motor (102) to maintain a speed not exceeding the target motor speed, which depends on the target motor speed value, for a period after receiving the at least one input signal and until a further signal is received indicating that the motor (102) has been reconnected to a drive shaft (104). The control unit is arranged to allow the motor speed to exceed the target motor speed after receiving the further signal.

An agricultural system includes a control system. The control system obtains an input value of a characteristic corresponding to a geographic location. The control system further obtains a predictive power model, the predictive power model modeling a relationship between values of the characteristic and values of a power characteristic and configured to receive the input value of the characteristic corresponding to the geographic location and output an output value of the power characteristic corresponding to the geographic location. The control system generates a control signal to control a controllable subsystem of a mobile agricultural machine based on the output value of the power characteristic.

To provide a vehicle control device that can prevent engine exhaust system components from overheating. [Solution] The vehicle includes an engine and a control unit that performs engine revving control, which revs the engine when the accelerator pedal input exceeds a threshold TH1 in a non-driving range. When the time during which the engine revving control has been performed reaches an upper limit time TL, the control unit terminates the engine revving control and stops the engine.

The invention provides an engine rotating speed calculation method, and belongs to the technical field of power control, and the method comprises the steps: collecting and coding the edges of a crankshaft and a camshaft at an eTPU end; fault diagnosis logic is introduced into each acquisition edge of a crankshaft and a camshaft, and acquisition results are divided into four conditions for encoding; crankshaft and camshaft tooth cycle data are collected at the eTPU end and transmitted to the main processor end. Four different rotating speed values are calculated according to the collected periodic data; calibration parameters are introduced, engine control software can flexibly select a rotating speed value calculation source by calibrating the parameters, and different rotating speed values are selected under different working conditions. Accuracy and stability of rotating speed calculation can be improved, and then working efficiency of an engine is improved. Theoretical analysis and experiments show that the rotating speed stability can be effectively improved by using the method, and the engine can still run stably under the condition that the single crankshaft / camshaft is lost suddenly.

A vehicle (1) includes: a driving source (10); a rotation sensor (261) that detects a rotational speed of the driving source; control circuitry (30); and an actuator (40) that operates the driving source. When the rotational speed of the driving source has exceeded a preset upper threshold, the control circuitry executes suppression control that suppressed an output power of the driving source in comparison with before the rotational speed of the driving source exceeds the upper threshold. In the suppression control, the control circuitry gives to the actuator a command that makes the output power of the driving source suppressed in comparison with before the suppression control is executed, in accordance with an excess degree set in relation to an excess time period that is a time period in which the rotational speed of the driving source has exceeded the upper threshold.

A vehicle includes: a driving source; a rotation sensor that detects a rotational speed of the driving source; control circuitry; and an actuator that operates the driving source. When the rotational speed of the driving source has exceeded a preset upper threshold, the control circuitry executes suppression control that suppressed an output power of the driving source in comparison with before the rotational speed of the driving source exceeds the upper threshold. In the suppression control, the control circuitry gives to the actuator a command that makes the output power of the driving source suppressed in comparison with before the suppression control is executed, in accordance with an excess degree set in relation to an excess time period that is a time period in which the rotational speed of the driving source has exceeded the upper threshold.

The invention provides a hydrostatic driving method and device for a snow pressing vehicle and a hydraulic system, and relates to the technical field of snow pressing vehicles. The method comprises the steps that the actual rotating speed of an engine is detected and compared with a preset optimal rotating speed range, and a rotating speed deviation signal is generated; based on the rotating speed deviation signal, the displacement adjusting amount of a variable pump and the displacement adjusting amount of a variable motor are calculated through an incremental PID control algorithm; dynamically adjusting the displacement of a variable pump and a variable motor according to the displacement adjusting quantity so as to realize stable control on the rotating speed of the engine; wherein when the load is increased, the variable displacement motor is adjusted to increase the displacement, and if the displacement of the motor reaches the maximum, the variable displacement pump is adjusted to reduce the displacement; when the load is reduced, the variable displacement pump is adjusted to increase the displacement, and if the pump displacement reaches the maximum, the variable displacement motor is adjusted to reduce the displacement. According to the method, the pump and the motor are cooperatively controlled through the incremental PID, the rotating speed of the engine is stabilized, efficient operation of the engine is maintained, and therefore the power utilization rate and the fuel economy are improved.

The invention discloses a soot particle modification method based on in-cylinder combustion regulation of an automobile engine, belongs to the technical field of combustion control of internal combustion engines, and solves the technical problem that the adsorption capacity of soot particles is relatively weak. The method comprises the steps that fossil fuel, oxygen-containing fuel and other fuels with different properties are adopted for engine design of the engine fuel; and then effective control over the combustion process and the combustion path of the engine is achieved by adjusting control parameters such as the air inlet parameter, the oil injection strategy, the operation working condition, the EGR rate and the equivalence ratio of the engine. And finally carrying out carbonaceous test and evaluation on the collected soot particles. The average particle size of the modified soot particles is reduced by 6.3%, the graphitization degree is reduced, and the specific surface area is increased by 39.1%; the pore size distribution range is 2-140nm and belongs to mesopores and macropores, and the total pore volume is increased by 3.5%. This allows the soot particles to have higher oxidation activity and adsorption properties.

A rotary oil electric hybrid engine, which is an engine with a completely new structure. Taking the example that the inner rotor is connected to the power output shaft, regarding the structural features, the outer rotor cylinder and the inner rotor axis form an annular chamber. The outer rotor blades and the inner rotor blades divide the annular chamber into a combustion chamber and a buffer chamber. The outer rotor and the inner rotor rotate in the same direction within the range of the change angle difference within the circumferential angle. Regarding the operating characteristics, when starting cold, the gas in the combustion chamber is exhausted. The numerical control motor is interlocked with the bumps of the limit ring, meshes the inner rotor and the outer rotor, rotates them at the same speed, and reaches a high rotational speed. During the intake stroke, the numerical control motor decelerates to drive the outer rotor to decelerate. Inertia increases the angle difference between the inner rotor and the outer rotor to realize the intake stroke. The numerical control motor accelerates to catch up and reduces the angle difference between the inner rotor and the outer rotor to realize the compression stroke. The total mass of the numerical control motor, the inertial flywheel and the outer rotor is much larger than the mass of the inner rotor, providing a reaction force rotating in the same direction during the expansion work stroke. The numerical control motor accelerates to catch up and reduces the angle difference between the inner rotor and the outer rotor to complete the exhaust stroke and enter the cycle.

The invention provides an engine control strategy parameter optimization method which comprises the following steps: establishing a fuel consumption calculation model of an engine according to an obtained engine fuel consumption rate MAP; according to the engine fuel consumption rate output by the fuel consumption calculation model, the fuel consumption of the engine is determined; continuously iterating the control strategy parameters by utilizing a multi-island genetic algorithm and combining the constraint range of the control strategy parameters until the fuel consumption of the engine is the lowest, and obtaining optimized control strategy parameters; the control strategy parameter is used for representing the engine working rotating speed based on the multi-point switching control strategy in the tandem type hybrid power system. The control strategy parameters can be accurately and efficiently optimized, the real vehicle test cost is avoided, and the development process is accelerated.

A driveline includes an engine system including an engine, the engine having an output shaft. The driveline further includes a gearbox having a gearbox input connected with the output shaft of the engine and a gearbox output, and an equipment including a load, the load having a load input connected with the 5 gearbox output. The driveline further includes a controller in communication with the engine system, gearbox and equipment. The controller is configured to adjust one or more operating conditions of one or more of the engine system, gearbox, and equipment to satisfy one or more control objectives.

The invention provides a fan control method, device, equipment and product and a vehicle, and relates to the technical field of vehicles. After the vehicle enters an off-road working condition, the change rate of the fan rotating speed, the actual rotating speed of an engine and the actual rotating speed of the fan are monitored; determining a target PID correction coefficient based on the actual rotating speed of the engine, the actual rotating speed of the fan and the target rotating speed of the fan determined based on the thermal management requirement of the vehicle, adjusting the change rate of the rotating speed of the fan based on the target PID correction coefficient, and when it is monitored that the change rate of the rotating speed of the fan is larger than a preset change rate of the rotating speed of the fan after adjustment. The actual rotation speed of the engine is controlled to be reduced, control over the rotation speed change rate of the fan is achieved, failure conditions such as fan breakage caused by sudden rotation speed change are avoided, in addition, the rotation speed change rate of the fan is controlled through PID adjustment, and power loss or mechanical loss caused by direct change of the actual rotation speed of the engine can be avoided.

Method for operating a drive unit for a motor vehicle, wherein the drive unit has a drive unit and, when the drive unit is started, the actual speed of the drive unit is first set to an overshoot speed and subsequently to an idle speed of the drive unit, characterized in that the starting process includes towing the drive unit to a minimum speed, from which the drive unit automatically increases its actual speed up to the overshoot speed, wherein the overshoot speed and the idle speed are set to different values ​​in different operating modes of the drive unit.wherein the overshoot speed in a first of the operating modes is set to a first overshoot speed and in a second of the operating modes to a second overshoot speed different from the first overshoot speed, and wherein the idle speed in the first operating mode is set to a first idle speed and in the second operating mode to a second idle speed different from the first idle speed, wherein the second overshoot speed is chosen to be greater than the first overshoot speed by an overshoot speed difference and the second idle speed is chosen to be greater than the first idle speed by an idle speed difference, wherein the overshoot speed difference corresponds to the idle speed difference with a tolerance of at most 50%.

The application relates to the technical field of ship power control, and discloses a ship power system energy efficiency optimization control system based on multi-sensor fusion, which comprises the following modules: a multi-source data acquisition module, which is used for synchronously collecting hull, shafting and air path parameters; a kinematics mapping calculation module, which is used for calculating a propeller transient immersion index; a phase extraction and mode determination module, which is used for extracting a wave phase and an amplitude output mode signal; a fuel mechanical dynamics feedforward module, which is used for generating an oil injection instruction according to the amplitude and the immersion index derivative; an air thermodynamics cooperative control module, which is used for controlling a valve and starting a scavenging blower according to a phase angle; and a long-term energy efficiency optimization module, which is used for finely adjusting a main rotating speed setting value according to an energy efficiency cost function gradient. The technical scheme of extracting the transient immersion index and the fluctuation amplitude to dynamically adjust the rotating speed control dead zone and superimpose a negative fuel feedforward instruction is adopted, so that the technical effects of suppressing abnormal fluctuation of the main engine rotating speed under high sea conditions and reducing unnecessary fuel consumption are achieved.

This invention relates to the field of diesel engines, providing a diesel engine cold start control method, system, and electronic equipment. The method includes: obtaining the diesel engine speed at the Nth injection time most recent; calculating the engine speed increase rate based on the obtained N engine speeds; determining whether the engine speed increase rate meets a first preset condition; and if the first preset condition is met, stopping fuel supply to at least one cylinder in the diesel engine. This addresses the problem that during a cold start, the diesel engine speed increases too quickly, and the speed increase rate is mismatched with the engine's warm-up rate, which may affect the stable operation of the diesel engine, leading to drastic speed fluctuations and frequent misfires. The solution of this application calculates the engine speed increase rate based on the collected engine speeds, and stops fuel supply to the cylinders if the speed increase rate meets the set conditions. This makes the engine speed increase more stable, reducing drastic speed fluctuations and misfires.

The invention discloses a mechanical diesel engine rotating speed control method and system.The method is executed by a whole machine controller and comprises the steps that the real-time rotating speed of a mechanical diesel engine and a monitoring signal used for judging the whole machine load state are obtained; judging whether the whole machine is in a no-load state based on the monitoring signal; when the whole machine is in the no-load state, the difference value between the real-time rotating speed and the current gear target rotating speed is calculated; judging whether the calculated difference value exceeds a preset difference value threshold value or not; if yes, calculating a voltage correction amount according to the difference value and a pre-stored calibration mapping relation between the rotating speed and the voltage; and adjusting the control voltage output to the accelerator motor based on the voltage correction so as to adjust the rotating speed of the mechanical diesel engine. Real-time feedback and closed-loop adjustment are carried out on the rotating speed of the mechanical diesel engine in the no-load state, rotating speed reduction is effectively restrained, synchronous updating of all-gear calibration parameters is achieved through single-gear correction, and the rotating speed control precision and the system calibration efficiency are remarkably improved.

Method comprising: automatically reducing a speed of an engine from a first speed value to a second speed value in response to both the first speed value being at or above a first speed threshold and a rate of change of (i) engine power and / or (ii) engine speed being substantially zero for a certain period of time.

Provided is a work machine capable of achieving significant increases and decreases in engine rotational speed and easy fine adjustment thereof. The work machine includes: a power device that drives rotation; a work device that operates using the power device as a power source; and an instruction device that instructs an increase and a decrease in rotational speed of the power device. The instruction device includes a first instruction device and a second instruction device. A minimum change unit of the rotational speed of the power device that can be instructed by the first instruction device is different from a minimum change unit of the rotational speed of the power device that can be instructed by the second instruction device.