115results about "Speed sensing governors" patented technology

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.

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.

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 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.

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.

The invention provides an engine control method, a vehicle control unit and a vehicle, and relates to the technical field of vehicle control. According to the method, an engine is not controlled under the conditions that a hand brake is pulled up and the opening degree of an accelerator is smaller than a first preset opening degree threshold value, and an accelerator pedal signal is responded through an ECU; the purposes of preventing the vehicle from suddenly moving due to mistakenly stepping on the accelerator during parking and avoiding accidents are achieved, meanwhile, when the hand brake is loosened and the brake opening degree is smaller than the preset brake opening degree threshold value, the engine is switched into the rotating speed control mode, the purposes of providing proper engine braking force and avoiding engine flameout are achieved when the vehicle is slightly braked, and the safety of the vehicle is improved. Therefore, the technical problem of engine flameout during starting of the AMT is solved, and the technical effects that vehicle jerking caused by engine flameout is avoided, and smoothness and comfort in the driving process are improved are achieved.

There is disclosed a fuel adjustment device, including an ECU (10) and a catalyst (53) downstream oxygen sensor (SE4); ECU (10) controlling a fuel injection device (61) that causes an engine (5) to work; the catalyst downstream oxygen sensor (SE4) being provided downstream of a three-way catalyst (53) in an exhaust system attached to engine (5) and detects an oxygen concentration of an exhaust gas; ECU (10) adjusting a fuel supply amount such that an engine rotation speed decreases when the engine rotation speed reaches a first rotation speed (rs1); the first rotation speed (ra1) being the rotation speed corresponding to overspeeding; when the engine rotation speed decreases and reaches a second rotation speed (rs2), an amount of fuel being supplied to engine (5) is changed back to a normal amount; thereafter, when the engine rotation speed is continuously maintained in a monitoring range, the fuel supply amount being adjusted based on a detection result of the catalyst downstream oxygen sensor (SE4); the monitoring range is a range that includes the second rotation speed (rs2) and is lower than the first rotation speed (rs1).

This application relates to a control device and method for discharging condensate. An embodiment of the condensate discharge control device includes a signal receiver configured to receive a power start-stop signal; a temperature receiver configured to receive outdoor air temperature information; and a controller configured to execute a condensate discharge mode that maintains the engine in an idling state for a preset power start-stop period in response to the signal receiver receiving the power start-stop signal and the outdoor air temperature information received from the temperature receiver being equal to or lower than a set temperature value.

To provide a power control unit 1 for a ship's propulsion system 100, comprising an internal combustion engine 4 and a shaft 2 having a shaft generator 5. [Solution] The power control unit 1 is configured to provide fuel commands to the internal combustion engine 4 based on the low-speed component of the shaft 2 speed error, i.e., the low-speed component of the deviation of the shaft speed from the speed setpoint. A generator power command is provided to the shaft generator 5 based on the high-speed component of the shaft 2 speed error and the state of the electrical grid of the electrical grid electrically connected to the shaft generator 5. An energy buffer 7 is used to store power from the shaft generator 5, release power to the shaft generator 5, and release power to the electrical grid 8. Thus, it becomes easier to achieve a more stable engine control system and avoid engine overload.

A material handling limitation device for a forklift including an engine and a material handling device is provided. The material handling limitation device includes a vehicle speed sensor configured to output a signal corresponding to a vehicle speed of the forklift, an accelerator sensor configured to output a signal corresponding to an operation amount of an accelerator pedal, and a controller configured to calculate the vehicle speed based on the signal from the vehicle speed sensor, execute a vehicle speed limiting process that limits the vehicle speed based on at least the vehicle speed, and execute, in a case where an anomaly related to the vehicle speed limiting process has occurred, a traveling process (S4) that controls a rotational speed of the engine based on the signal from the accelerator sensor and a material handling limitation process (S5) that limits operation of the material handling device.

[Object] It is to provide a control device of a vehicle capable of preventing an exhaust system component(s) for an engine from being overheated. [Solution] There is provided a vehicle with an engine and a control unit. The control unit is configured to execute an engine racing control of racing the engine, while an accelerator operation amount exceeds a threshold value TH1 with a non-travel range. The control unit is to terminate the engine racing control to thereby stop the engine, when the engine racing control is continued for an upper limit period of time TL.

The application discloses a rotating speed control module for an electronic speed regulator, which comprises a double-shaft potentiometer, a limiting component, a shaft coupling component, a manual speed-adjusting lever and a DC servo motor; the double-shaft potentiometer is a continuously adjustable resistor, which is used for controlling the running speed of the DC servo motor and changing the output resistance value of the double-shaft potentiometer according to the rotating direction of the DC servo motor; the output shaft of the double-shaft potentiometer is connected with the DC servo motor through the shaft coupling component, the limiting component is arranged on the output shaft of the double-shaft potentiometer and is used for limiting the rotating angle of the DC servo motor; and the manual speed-adjusting lever is installed on the shaft coupling component. The rotating speed of the engine can be manually adjusted, so that the engine can continue to operate stably and reliably in the case that the electric control potentiometer is damaged.

The invention belongs to the field of mechanical engineering, particularly relates to an intelligent speed regulation control system of a diesel engine, and aims to solve the problems of rotating speed response lag, low control precision and high energy consumption of an existing system under a dynamic load. The system comprises a real-time state sensing module, a composite error generation module, a multi-mode control decision module, an execution driving module and a self-learning optimization module. Smooth switching is realized based on mode arbitration by constructing a three-dimensional composite error feature matrix and fusing three strategies of feed-forward compensation, adaptive fuzzy sliding mode control and online reinforcement learning; and high-precision oil injection execution and offline knowledge extraction are combined, so that the dynamic response, the steady-state precision and the energy efficiency performance are improved.

A power control unit (1) for a propulsion system (100) of a marine vessel comprising an internal combustion engine (4) and a shaft (2) with a shaft generator (5) is configured to provide a fuel command to the internal combustion engine (4) based on a slow component of a speed error of the shaft (2), i.e. the slow component of a deviation of the shaft speed from a speed setpoint. A generator power command is provided to the shaft generator (5) based on a fast component of the speed error of the shaft (2) as well as on an electrical grid state of an electrical grid that is electrically connected to the shaft generator (5). An energy buffer (7) is used for storing and releasing electrical power from and to the shaft generator (5) and to the electrical grid (8). Thus, a more stable engine control regime and the avoidance of an engine overload is easier to achieve.

A method for controlling air and fuel supply to an engine of a machine includes: detecting, by a processing circuit, a change in a loading condition on the engine of the machine based on use of an implement system of the machine; and providing, by the processing circuit, a command to (i) a fueling system of the machine to increase an amount of fuel provided to the engine by the fueling system and (ii) an air handling system of the machine to increase at least one of (a) an amount of air or (b) a boost pressure of the air provided to the engine by the air handling system in response to an increase in the loading condition.

To provide an electric transportation vehicle that can surely determine a starting impossible state caused by contacting of the vehicle with a vehicle stop when the vehicle starts.SOLUTION: An electric transportation vehicle 1 runs by driving force of an electric motor 11 that is driven by electric power supply from an electric power generator 13 that is driven by an engine 12. A controller 30 that controls the electric motor has: an engine rotation speed determining part 42 that determines whether an engine rotation speed Ne that is a detected value by a rotation speed sensor 23 is equal to a rotation speed threshold Nth or higher when an instruction for making the vehicle start; an elapsed-time determining part 43 that determines whether a first elapsed time Ta measured after a time at which the detected value Ne is determined to be the rotation speed threshold or higher is equal to a time threshold Tth; and a start determining part 44 that determines whether a vehicle speed Vs that is a detected value by a speed sensor 24 is equal to the speed threshold Vth or higher after the first elapsed time is determined to be equal to the time threshold. The electric transportation vehicle stops the electric motor when the detected value by the speed sensor is determined to be less than the speed threshold.SELECTED DRAWING: Figure 3

An electronic throttle control method by which an electronic control unit (ECU) controls opening and closing of a throttle while providing a control signal on a basis of an input data signal may include calculating, via the ECU, i) an engine revolution speed deviation from a difference between an engine revolution speed and an engine revolution speed command, ii) an engine revolution acceleration on a basis of the engine revolution speed, iii) a proportional torque from a product of the engine revolution speed deviation and a proportional torque coefficient, and iv) an integral torque by multiplying an integral of a product of the engine revolution speed deviation and an integral torque coefficient by a forgetting coefficient. The method may further include providing, via the ECU, the control signal for the throttle using a sum of the proportional torque and the integral torque as a torque command value.

The present application relates to a kind of control method, device, vehicle and storage medium, wherein, control method includes: obtaining engine speed, engine actual load and the engine target load corresponding to set type;According to engine speed, engine actual load and engine target load, the target angle corresponding to the set type of variable valve timing mechanism is determined;According to target angle, the angle corresponding to the set type of variable valve timing mechanism is controlled.According to the above technical means, when engine target load is rapidly reduced and engine actual load is larger, the target angle corresponding to the set type of variable valve timing mechanism can be limited, so that the target angle corresponding to the set type is set to the angle that does not produce over-blast, thereby reducing the probability of over-blast occurrence, to protect engine, and better driving performance can be obtained.

The invention relates to a target rotating speed control method based on a tire size self-learning model, and the method comprises the following steps: S1, carrying out the actual tire perimeter learning, and obtaining a tire perimeter learning value; s2, calculating the rotating speed of the virtual input shaft according to whether the rotating speed of the virtual input shaft meets conditions or not and the tire perimeter learning value; and S3, calculating a target rotating speed and a final target idle speed according to the rotating speed of the virtual input shaft. Compared with the prior art, the method has the advantages that the problems that the actual rotating speed falls into a pit and fluctuates all the time are solved.

To actualize a quick increase in the revolution of a stratified scavenging engine.SOLUTION: A governor device for adjusting the revolution of the stratified scavenging engine including a pilot air passage where pilot air is distributed for scavenging combustion gas from a combustion chamber and an air-fuel mixture passage where air-fuel mixture with fuel mixed is distributed, includes a fly weight connected to a crank shaft of the stratified scavenging engine for generating governor force according to the revolution of the stratified scavenging engine, a pilot air valve capable of adjusting the opening of the pilot air passage according to the governor force generated by the fly weight, and a throttle valve capable of adjusting the opening of the air-fuel mixture passage and the opening of the pilot air passage at the same time. The fly weight does not transmit the governor force to the throttle valve.SELECTED DRAWING: Figure 3