82 results about "Stall (engine)" patented technology

The invention discloses a voiceprint monitoring method, system, medium and equipment for rotation stall of an aero-engine compressor, and the method comprises the steps: determining the layout of a microphone array through the model parameters of the compressor of the aero-engine, and carrying out the synchronous collection of sound pressure time domain signals of multiple channels of the compressor of the aero-engine through the microphone array; arranging the multi-channel sound pressure time-domain signals in sequence to construct a time-domain signal matrix; performing spectral analysis on the sound pressure time-domain signals by adopting a fast Fourier transform algorithm to obtain a spectrogram of the sound pressure time-domain signals of each channel, monitoring whether an abnormal single-tone frequency peak value lower than one time of rotation frequency appears in the spectrogram or not, obtaining an acoustic mode spectrogram of the abnormal single-tone frequency peak value by adopting a single-frequency acoustic mode decomposition method, and obtaining an acoustic mode spectrum of the abnormal single-tone frequency peak value; and whether the rotating stall characteristic of the gas compressor occurs in the acoustic mode spectrogram is monitored to judge whether the rotating stall characteristic of the gas compressor occurs or not.

The invention relates to the technical field of internal combustion engine exhaust devices, in particular to an internal combustion engine exhaust pipe which comprises an exhaust tail pipe, a sealing plate, a sliding block, a transmission assembly and a limiting assembly are arranged on the exhaust tail pipe, and when a vehicle runs normally, the limiting assembly keeps the sealing plate in the state that the axis of the sealing plate is perpendicular to the rotation axis of the exhaust tail pipe; therefore, the blocking area of the sealing plate to the gas in the linear tail pipe is ensured to be at the minimum value, and the exhaust effect of the exhaust pipe is ensured; when a vehicle enters a road surface with accumulated water higher than the lower dead center of the sliding block, the sliding block moves up and down according to the height of the accumulated water on the road surface, limitation of the limiting assembly on the sealing plate is relieved when the sliding block moves upwards, and meanwhile up-down movement of the sliding block is converted into horizontal rotation of the sealing plate through the transmission assembly. When the vehicle flames out and the accumulated water on the road surface is higher than the lowest point in the linear tail pipe, the sealing plate completely seals the interior of the linear tail pipe, and it is guaranteed that the accumulated water on the road surface cannot continue to move forwards after reaching the linear tail pipe when the vehicle flames out due to wading.

The invention aims at solving the technical problems that in the prior art, clutch position-torque matching precision is low, starting shaking, gear shifting pause and other smoothness problems are likely to be caused, and abnormal abrasion of a clutch and engine flameout are caused, and provides an AMT clutch semi-combination point dynamic learning method. Vehicle running parameters in the vehicle running process are collected in real time, and meanwhile an initial clutch position-torque curve is generated through fitting calculation; judging whether the vehicle operation parameters meet the enabling condition of dynamic learning of the half-joint point of the clutch or not; if the vehicle operation parameters do not meet the enabling condition, semi-joint point dynamic learning is not carried out; if the vehicle operation parameters meet the enabling conditions, semi-joint point dynamic learning is started; and in the semi-combination point dynamic learning process, calculating a semi-combination point value and updating the initial clutch position-torque curve in real time to realize dynamic learning of the clutch semi-combination point.

The application provides a hydraulic torque converter control method and device, and belongs to the field of automobile gearbox control. When current vehicle parameters meet preset conditions, especially when the current vehicle speed is within a preset vehicle speed range, the clutch in the hydraulic torque converter is controlled to switch to a sliding friction state, that is, a semi-linked state. In this state, the engine can stop fuel injection, and the engine can also be prevented from stalling due to low wheel speed dragging the engine or the engine losing connection with the wheels. In summary, the engine can continue to be fuel cut on the basis of avoiding engine stall, the fuel cut time is prolonged, and oil consumption is further reduced.

The present disclosure relates to a fixed displacement pump hydraulic system for a crane, a control method thereof, and a crane. The fixed displacement pump hydraulic system includes a first fixed displacement pump, a second fixed displacement pump, and an engine for driving the first and second fixed displacement pumps. The first fixed displacement pump provides pressurized oil to a working mechanism via a first hydraulic oil circuit, and the second fixed displacement pump provides pressurized oil to a working mechanism via a second hydraulic oil circuit. The fixed displacement pump hydraulic system also includes a control device configured to: when the crane is operating in a rated load idle state and the engine speed is less than the idle speed, unload the pressure in the first hydraulic oil circuit to shut off the first fixed displacement pump; and when the engine speed is equal to or greater than the idle speed, gradually increase the pressure in the first hydraulic oil circuit until the first fixed displacement pump reaches normal operation. By unloading the pressure in the first hydraulic oil circuit, the pressure in the hydraulic system can be reduced, thereby reducing the required engine output torque and preventing engine stall.

The invention discloses a fluid injection system and method for mitigating turbine engine rotational stall. A stall mitigation system (11) for a gas turbine engine (12) includes a turbine exhaust section (24) downstream of an expansion turbine (22). The turbine exhaust section (24) includes an inner wall (86) and an opposing outer wall (88) disposed radially along an exhaust flow path (84). The system (11) also includes a fluid injection system (38) configured to inject a fluid (73) into a chamber (89) located between the inner wall (86) and the outer wall (88) via a plurality of inner ports (54, 134) disposed in the inner wall (86) and / or a plurality of ports (146) disposed in struts (90, 92) extending from the inner wall (86) to the outer wall (88). The plurality of inner ports (54, 134) and the plurality of ports (146) are disposed downstream of a last stage blade (91) of the expansion turbine (22).

Provided in the present application are a vehicle control method, a vehicle control apparatus and a vehicle. The vehicle control method is applied to a vehicle control unit, and comprises: acquiring an electric motor torque request and an engine torque request in a target vehicle, and a filtered electric motor torque request and a filtered engine torque request; obtaining upper and lower limits of an electric motor torque and upper and lower limits of an engine torque on the basis of the electric motor torque request and the engine torque request; if the filtered electric motor torque request is located outside the upper and lower limits of the electric motor torque, controlling the electric motor torque to be reset to zero; and if the filtered engine torque request is located outside the upper and lower limits of the engine torque, controlling the engine torque to be reset to zero. The vehicle control method can reduce the occurrence probability of a vehicle stall.

The application discloses a control method of a vehicle emergency braking working condition, computer equipment and a vehicle, and relates to the technical field of engine control, wherein the control method comprises the following steps: determining that the vehicle enters the emergency braking working condition, increasing a preset idle speed of the engine to a first speed threshold, activating idle closed-loop control based on the current speed of the engine and the first speed threshold, obtaining an idle fire path torque under the emergency braking working condition based on the idle closed-loop control, and controlling the engine to output the idle fire path torque. The application can identify the emergency braking working condition of the vehicle, increase the preset idle speed of the engine to the first speed threshold, reduce the phenomenon that the load drag torque is large and the engine output torque is insufficient to meet the stable operation of the idle speed under the emergency braking working condition, reduce the probability of engine stall, and improve the user experience.

The present invention relates to a control device for an electric vehicle. The control device for an electric vehicle can simulate engine stall and suppress situations that may cause adverse conditions by simulating engine stall. The control device includes a virtual engine rotational speed calculation unit that calculates a virtual engine rotational speed based on the amount of operation of an accelerator operating unit and a clutch operating unit. When the virtual engine rotational speed calculated by the virtual engine rotational speed calculation unit is less than a predetermined predetermined rotational speed, an engine stall control is executed to stop a rotating motor to simulate engine stall. When the engine stall control is executed, a holding assist control is executed in which a braking device applies a braking torque to the wheels (step S2).

A downshift control method, apparatus, and device, and a storage medium, relating to the technical field of automobiles. The method comprises: step S10, upon detecting that a vehicle is in a direct drive mode and emergency braking is being performed, acquiring a current driving gear of the vehicle; step S20, upon detecting that the driving gear is a high-speed gear, acquiring a current real-time vehicle speed and real-time acceleration of the vehicle; step S30, when the real-time vehicle speed is greater than a preset speed threshold and the real-time acceleration is less than a preset acceleration threshold, predicting a target driving gear required by the vehicle; and step S40, on the basis of the target driving gear, controlling the vehicle to downshift in advance. The present method allows the direct coupling between the engine and the wheel ends to be disengaged in advance, so that the engine rotational speed does not drop excessively while following the wheel-end rotational speed corresponding to the real-time vehicle speed, thereby avoiding engine stall.

The present disclosure provides "Methods and systems for detecting engine stall". Systems and methods for operating a hybrid powertrain are described, the hybrid powertrain including an engine and a motor / generator. The systems and methods provide a way to determine whether the engine has stalled when the vehicle can be propelled via the motor / generator. In one example, an engine stall can be indicated in response to a first estimated engine torque and a second estimated engine torque.

To provide a work vehicle whose air conditioner can be driven by power from a gasoline engine, which is configured to suppress an engine stall even under a situation where loads on the engine increase.SOLUTION: A work vehicle is equipped with: a gasoline engine E; an operation cabin covering a boarding space; an air conditioner which has a compressor 63 that is driven by the gasoline engine E and an air-conditioning unit that generates air flow for air-conditioning that is supplied to the loading space; and an air-conditioner control unit 51 that controls the air conditioner. A compressor driving command for driving the compressor 63 at the time of starting the air conditioner is issued in accordance with engine state information showing a state of the gasoline engine E.SELECTED DRAWING: Figure 4

The utility model provides an electro-hydraulic control main clutch mechanism and a harvester, and belongs to the technical field of main clutch electro-hydraulic control of harvesters. The oil tank is connected with the two-position two-way valve through a multi-way valve oil return rubber pipe and a tripping oil return rubber pipe which are connected in sequence; wherein a multi-way valve is further arranged between the multi-way valve oil return rubber pipe and the tripping oil return rubber pipe; the multi-way valve is connected with a rodless cavity of the main clutch oil cylinder through a first pipeline. The multi-way valve is connected with a rod cavity of the main clutch oil cylinder through a second pipeline; the two-position two-way valve is also communicated with the first pipeline; and when the two-position two-way valve is electrified, the oil tank is communicated with the rodless cavity. When the automobile is shut down and flameout occurs, under the condition that the automobile is not started, a rod cavity and a rodless cavity of the oil cylinder are communicated with an oil tank at the same time through a two-position two-way valve, and a piston rod of the main clutch oil cylinder is in a free state, so that a clutch bypasses a dead point by using external force so as to be reset, and the piston rod is retracted; the problem that the main clutch is difficult to reset after the harvester shuts down and flames out is solved.

The present application provides a kind of control device of vehicle, it can improve the acceleration response after temporarily deceleration travel.In the period of vehicle deceleration, engine stall needs to be avoided (in step S2 "Yes"), in the case of the response of needing to reaccelerate (in step S3 "Yes"), engagement mechanism is set to release state (step S4), in the period of vehicle deceleration, engine stall needs to be avoided (in step S2 "Yes"), in the case of the response of not needing to reaccelerate (in step S3 "No"), release lock-up clutch (step S5).

This invention relates to the field of aerodynamic design technology for multi-stage axial compressors, and discloses a design method and system for passive stability enhancement of a multi-stage axial compressor through self-circulation. By calculating the aerodynamic performance of the multi-stage axial compressor and evaluating engine stability, the method identifies operating conditions where the multi-stage axial compressor has insufficient stability margin. Unsteady flow field simulations are then conducted under these conditions to determine the first stage stall. For the first stage rotor tip stall, a self-circulating casing is used for passive stability enhancement of the multi-stage compressor. The self-circulating casing structure is derived from sensitivity analysis of its design parameters, selecting the optimal design parameters to ensure an increase in the stability margin of the multi-stage axial compressor across the entire speed range. This satisfies the stability margin requirements of multi-stage axial compressors and avoids the problem of insufficient stability margin in high-load multi-stage axial compressors across the entire operating speed range.

The invention relates to the technical field of lithium battery recovery processing, and discloses efficient lithium battery recovery processing equipment and method.The efficient lithium battery recovery processing equipment comprises a receiving box and a sealing plate, the interior of the top end of the receiving box and the periphery of the sealing plate are fixedly installed, and a reciprocating limiting material pressing mechanism is arranged on the upper surface of the sealing plate. According to the efficient recycling treatment equipment and method for the lithium batteries, through the use of a first driving motor, a first transmission rod, a first belt wheel, a first transmission belt, a second belt wheel, a connecting shaft, a cam, a pressing block and other structures, continuous rotary driving can be converted into periodic downward pressure, and the batteries in the feeding hopper are forcibly compacted and pushed; an arch bridge structure formed by materials is effectively destroyed, and unstable feeding is converted into uniform and controllable intermittent feeding, so that the torque of the main shaft is prevented from being increased, the possibility of stuffy shutdown caused by overload is reduced, the production continuity is guaranteed, and impact abrasion to the crushing plate, the main shaft and a transmission system is also reduced.

The invention relates to the field of vehicle control methods, in particular to a torque control-based one-key rotating speed increasing and idle speed control method, which comprises the following steps of: judging whether a vehicle meets a PTO (Power Take Off) starting control condition or not; performing PTO target rotating speed control of the engine according to whether the PTO is started or not; pTO rotating speed closed-loop control is carried out, and after the PTO is started, the maximum value of the PTO target rotating speed and the idling target rotating speed serves as the target idling speed of the engine for control; pTO torque control is carried out, a static torque value and a dynamic torque value are obtained, and when the request signal is started, the torque of the refrigeration compressor is the combined action of the static torque and the dynamic torque and is kept according to the keeping time; and the PTO starts idling torque control, in the PTO activation state, the idling torque is kept near 0, the idling torque learning value is kept within + / -2%, and meanwhile coordinated control is conducted in cooperation with the ignition angle and the fuel injection quantity. Stable operation of the engine can be maintained, oil consumption is reduced, driving safety risks caused by flameout of the vehicle are prevented, and more comfortable driving experience is achieved.

The application discloses a connecting pipe, an engine system and a vehicle, comprising a pipe body for medium flow, wherein the medium comprises liquid and gas, and a homogenizing structure arranged in the pipe body and used for dispersing the liquid to make the liquid and the gas fully mixed. The technical problem that condensed water accumulated in a middle cooler in the prior art may flow into a combustion chamber of an engine with gas and cause a flooded engine stall is solved.

The application discloses a vehicle climbing control method, system, double-clutch transmission and vehicle thereof, and comprises the following steps: determining whether the vehicle is in an uphill mode when starting on a slope; in the uphill mode, sending a request instruction for increasing an idle speed to an engine controller according to the size of a slope, an engine intake temperature and a gear position of the vehicle; when the engine speed is in an engine stall risk speed zone, activating a torque limiting function of a clutch; when the engine leaves the engine stall risk speed zone, releasing the torque limitation of the clutch. The application provides a vehicle climbing control method, system, double-clutch transmission and vehicle thereof, and the double clutch is used for climbing control of a small-torque engine or an engine with insufficient idle speed, so that the reasonable calculation of clutch required torque is ensured, the reasonable torque transmission of the clutch is ensured, and the problem of engine speed dragging or even engine stall is avoided.

The embodiment of the invention provides a delay assistance control method matched with a recirculating ball steering gear vehicle and related equipment, and belongs to the technical field of vehicle control. The method comprises the following steps: acquiring an IGN ignition signal, an engine signal, a vehicle speed signal and a historical assistance state of a previous period; determining a first input state according to the IGN ignition signal, determining a second input state according to the engine signal, and determining a third input state according to the vehicle speed signal; determining the power assisting state of the current period according to the first input state, the second input state, the third input state and the historical power assisting state, wherein the power assisting state comprises closing and activating; and in response to the fact that the power assisting state is activated, power assisting torque is determined according to the vehicle speed signal, and the power assisting torque is applied through a power assisting motor of a recirculating ball steering gear of the vehicle. The embodiment of the invention aims to improve the driving safety of the recirculating ball steering gear vehicle during accidental flameout.

The present invention provides a pumping control method, device, system and pumping vehicle. The method includes: obtaining the actual engine speed of the pumping vehicle at the current moment; if the actual engine speed meets a preset adjustment condition, determining the set engine speed of the pumping vehicle at the next moment based on the set engine speed at the current moment and the engine speed limit range of the pumping vehicle; controlling the pumping vehicle based on the set engine speed of the pumping vehicle at the next moment; the preset adjustment condition includes a first preset adjustment condition; the first preset adjustment condition is that the difference between the actual engine speed and the set engine speed is greater than a first speed difference. The method, device and system provided by the present invention effectively avoid the situation that the engine of the pumping vehicle drops in speed or even stalls, and improve the stability of the output of the pumping vehicle.

The invention relates to the field of ore scraper conveyors, in particular to a scraper conveyor transmission device with a motor torque monitoring function. The device comprises a speed reducer, a large coupler, a torque sensor, a small coupler, a connecting cover, a cable, a motor, an electric cabinet and a centralized control center. The running state of the motor can be more directly judged through the output torque of the motor, in the design of an ultra-long working face scraper conveyor and an ultra-heavy scraper conveyor at present, enough power margin is achieved through many times of theoretical calculation, but the phenomena of incapability of pulling and stalling occur in actual use, and the shutdown phenomenon is caused. The torque sensor is installed to directly judge the output torque of the motor under the condition that the motor cannot be pulled, and the torque is compared with the theoretical maximum output torque, so that the difference between the theory and the reality can be better known, and the reason for solving the problem of pulling failure is solved.

The utility model discloses an energy accumulator automatic pressure relief system and an engineering vehicle. The energy accumulator automatic pressure relief system comprises a gear handle position sensor, an engine rotating speed sensor, a vehicle speed sensor, a controller, an unloading electromagnetic valve and an energy accumulator. When the controller judges that input signals of the gear handle position sensor, the engine rotating speed sensor and the vehicle speed sensor meet the parking condition, the controller controls the unloading electromagnetic valve to act, the energy accumulator is made to communicate with the oil tank, and the automatic pressure relief function is completed. Through detection of different sensors, whether the vehicle meets normal flameout conditions or not can be judged more comprehensively, accidental flameout in the vehicle running process is avoided, the automatic pressure relief function of the energy accumulator 4 is triggered, emergency steering cannot be completed, and serious consequences are avoided.

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.

A powertrain that generates and transfers drive torque to a driveline of a hybrid electric vehicle is provided. The powertrain includes an internal combustion engine (ICE), at least one electric motor and a controller. The powertrain is configured to selectively deliver drive torque from at least one of the ICE and the at least one electric motor to drive wheels, the powertrain having a clutch that selectively disengages the ICE from a remainder of the powertrain. The controller is configured to determine a stall condition of the ICE; command the clutch to disengage the ICE based on a determination of the stall condition; command the ICE to restart; determine whether the ICE has restarted; and operate the powertrain in a hybrid mode based on confirmation that the ICE has restarted.

The invention relates to the technical field of engine control methods, in particular to a garden machine galloping flameout protection method and system, an intelligent terminal and a storage medium, and the method comprises the steps that the current rotating speed of an engine is monitored in real time; the current rotating speed is compared with a preset flameout protection threshold value, and the flameout protection threshold value is set to be higher than the highest set working rotating speed which can be maintained by the engine electronic speed regulating system in the normal working state; when the current rotating speed exceeds the flameout protection threshold value, it is judged that the engine enters a rotating speed out-of-control state, and an emergency protection instruction is generated immediately; and executing the emergency protection instruction, controlling the engine to execute flameout operation, and triggering an instrument to output overspeed alarm information. The overspeed protection method has the effect of improving the problems that an existing overspeed protection method is delayed in response and weak in rotating speed relevance.

The application relates to a vehicle oil circuit detection method and system, equipment, medium and product. The detection method comprises the following steps: acquiring the impurity content in the oil tank of a vehicle, determining the ratio of the impurity content to the volume of the oil tank as a first ratio; determining the expected flow of the vehicle; the expected flow indicates the amount of oil flowing through the oil circuit of the vehicle within a preset time period under the condition that the oil circuit of the vehicle is not blocked; determining the actual flow and the ratio of the actual flow to the expected flow as a second ratio; the actual flow indicates the amount of oil flowing through the oil circuit within a preset time period, and the actual flow is obtained by measurement; determining the blockage coefficient of the oil circuit based on the first ratio and the second ratio and the respective preset weight coefficients; and determining whether the oil circuit is blocked based on the blockage coefficient. By using the method, whether the oil circuit is blocked can be determined through the impurity content in the oil tank and the actual flow, the risk of poor oil circuit is reduced, and the problems of vehicle acceleration weakness and difficult starting after engine stall caused by poor oil circuit are avoided.

The embodiment of the application discloses a water pump stall discrimination method, which comprises the following steps: after receiving a water pump fault signal sent by a water pump after the water pump stalls, reading a cylinder head outlet water temperature of an engine acted on by the water pump and a cylinder body outlet water temperature of the engine; and determining whether mechanical jamming occurs to the water pump based on the cylinder head outlet water temperature and the cylinder body outlet water temperature. The embodiment of the application also discloses a water pump stall discrimination device, equipment and a computer readable storage medium.

The invention belongs to the technical field of protector circuits, and particularly relates to an engine protector circuit which comprises a power supply control unit, a delay control unit, a protection detection unit, an execution unit and an anti-false-triggering unit, and all the units cooperate to achieve protective flameout under the abnormal working condition of an engine. The power supply control unit comprises an ACC + 12V input end, an anti-reverse-connection diode D1, a P-channel MOS tube Q1, series resistors R1 and R2, an ECU control end, a three-end voltage stabilizer and a filter capacitor C1. The ACC + 12V input end is connected to the source electrode of the P-channel MOS tube Q1 through the anti-reverse-connection diode D1, the resistors R1 and R2 are connected between the grid electrode and the source electrode of the Q1 in series, the series connection node is connected to the ECU control end, the drain electrode of the Q1 is connected to the input end of the three-terminal voltage stabilizer, and the filter capacitor C1 is connected between the output end of the three-terminal voltage stabilizer and the ground in parallel to provide stable + 5V working voltage for the whole circuit.

A system includes a turbine exhaust section downstream of a turbine. The turbine exhaust section includes an exhaust flow path. The turbine exhaust section also includes an inner wall radially disposed along the exhaust flow path. The turbine exhaust section also includes an outer wall disposed radially outward of the inner wall and along the exhaust flow path. The system also includes a fluid injection system configured to inject a fluid into a chamber radially disposed between the inner wall and the outer wall via a plurality of inner ports disposed in the inner wall. The plurality of inner ports is disposed downstream of a downstream edge of a last stage blade of the turbine.