32 results about "Idle speed" patented technology

This application belongs to the field of aero-engine design and presents a design method for high-altitude starting fuel supply patterns based on the low-altitude starting fuel supply patterns. It involves first conducting high-altitude bench tests on the starter to obtain the power reduction characteristics of the starter at different altitudes. Then, based on the power balance equation, the acceleration time of the starter from rotor standstill to idle speed is determined. Finally, based on the acceleration time of the starter from rotor standstill to idle speed, the time allocation of the three starting stages of the starting process—starter engagement, starter disengagement, and engine starting—is performed to obtain the high-altitude starting fuel supply pattern. This method enables rapid and accurate design of the high-altitude fuel supply pattern, taking into account the engine's stability margin design in high-altitude areas, starter power characteristics, and the attenuation characteristics of starter power with increasing altitude, thus avoiding abnormal phenomena such as engine cold suspension and overheating. Furthermore, it can be based on ground starting data statistics, achieving better design compatibility and reducing debugging work.

This invention discloses a multi-objective optimization method for modifying the rear gear system of an engine using an attention-integrated mechanism, relating to the fields of engine NVH control and transmission system design technology. The method first constructs a multibody dynamics model of the engine's rear gear system, including idle speed, rated power point, and common operating speed conditions. The common operating speed conditions are selected as the global optimization benchmark, and a genetic algorithm is used to obtain the initial modification parameter combination. Then, an attention-integrated mechanism is introduced, dynamically and iteratively adjusting the weight coefficients of each operating condition based on the positive or negative state of the error improvement value, and performing a secondary verification of the initial modification parameters. If the weighted total improvement value after iteration is less than zero, negative screening is performed to eliminate the affected components. Finally, the optimization effect is verified by establishing a "dynamic force-vibration-noise" simulation chain. This invention effectively resolves the physical conflict between idling knocking and high-speed whistling by constructing a nonlinear decision model of "dynamic weight allocation + negative screening of operating conditions," achieving robust improvement in the NVH performance of the engine gear system across the entire operating range.

This invention relates to the field of accelerator technology for new energy vehicles, and discloses an idle speed anti-slip elastic positioning electronic accelerator pedal assembly, including a fixed base installed in the vehicle. An electronic control unit for intelligent control is disposed on the surface of the fixed base. A rotating shaft support is fixed to the surface of the fixed base, and a pedal arm is rotatably disposed on the surface of the rotating shaft support. A foot pedal surface is fixed to the surface of the pedal arm. In use, this invention employs a "lock-off when stationary, unlock-off when moving" control logic. Through active detection of the vehicle speed signal, the viscosity of the magnetorheological fluid increases when the vehicle speed is zero, applying locking damping to the pedal arm. This physically filters out minor interferences, avoiding unexpected starting problems when the vehicle is stationary, such as accidental touch by children, sensor signal jitter, or unintentional light touch by the driver. It can restrict the pedal arm at idle or stationary speeds, achieving the purpose of preventing idle speed slippage.

A vehicle control method and apparatus, relating to the field of electric vehicles, describes a method that, under engine idling speed, uses the speed signal collected by the generator resolver, combined with the engine ignition advance angle and the generator resolver angle, to determine the correspondence between the engine crankshaft angle and the generator resolver, generating a generator compensation torque phase waveform, and calculating the generator compensation torque based on the phase offset according to the delay calibration. Furthermore, with engine torque and generator speed fluctuations as the target, the generator compensation torque is adaptively optimized to obtain the final generator compensation torque. By applying the final compensation torque to the generator, the speed pulsation caused by the removal of the engine flywheel and torsional damper can be effectively reduced, thereby improving the overall vehicle NVH performance.

The present invention relates to an engine unit 21 and a saddle-ridden vehicle 1. The engine unit 21 comprises an engine 22, a motor 24, a first sensor 23, and a control portion 25. The motor 24 is connected to the engine 22. The motor 24 is configured to rotate the engine 22. The first sensor 23 detects a rotational speed G of the engine 22. The control portion 25 performs first assist control DA1 on the basis of the detection result of the first sensor 23. In the first assist control DA1, the control portion 25 causes the motor 24 to rotate the engine 22. When the rotational speed G is lower than a first threshold H1, the control portion 25 starts the first assist control DA1. The first threshold H1 is lower than an idle speed range J of the engine 22.

The invention relates to a method for operating an automatic transmission of a motor vehicle, in which the automatic transmission has at least one multi-plate shift element, wherein, when it is determined that a temperature (14) associated with the multi-plate shift element exceeds a first upper temperature threshold (T1), downshifts of the automatic transmission requested by means of the multi-plate shift element are prevented for a subsequent period of time and downshifts of the automatic transmission requested by means of the multi-plate shift element are carried out, and then, when it is determined that the temperature (14) associated with the multi-plate shift element exceeds a second upper temperature threshold (T2) higher than the first upper temperature threshold (T1), only such downshifts and downshifts of the automatic transmission to be carried out by means of the multi-plate shift element are executed.which are performed in a speed range close to idle speed, and all other downshifts and downshifts of the automatic transmission that are to be carried out by means of the multi-plate shift element are prevented.

The application discloses a kind of hybrid vehicle K0 clutch KP point oil pressure self-learning method, comprising: check the state of vehicle, determine whether vehicle satisfies KP point self-learning condition;Clutch is adjusted to be disconnected state;Maintain motor torque control, stabilize motor speed, keep engine speed idle speed;Constantly fill oil to clutch oil cavity;The speed difference of clutch both ends is monitored, and the average value of clutch oil pressure in the last five sampling periods is calculated as new KP point oil pressure value when the speed difference reaches critical value before this moment.The hybrid vehicle K0 clutch KP point oil pressure self-learning method provided by the application can adjust KP point oil pressure under vehicle stationary and motion conditions, increase self-learning frequency, thereby improve the accuracy of KP point.

The present application relates to a liquid cooling device for a saddle type vehicle, the power system of the vehicle is provided with the liquid cooling device in the width direction of the vehicle body; the liquid cooling device has a fan and a radiator, and a flow guide member arranged between the fan and the radiator; the fan has a plurality of blades, the fan is driven to rotate by the power system, and after the fan is driven to rotate, the inner peripheral track and the outer peripheral track are generated at the two ends of the blades; the radiator has at least a heat dissipation part, the heat dissipation part corresponds to the blades of the fan, the fan and the radiator of the liquid cooling device are arranged so that the rear end of the outer peripheral track of the blades of the fan in the longitudinal direction of the vehicle body is more offset to the rear than the rear end of the central part of the heat dissipation part of the radiator; the flow guide member has an air inlet and an air outlet, the air outlet is equivalent to or slightly smaller than the outer peripheral track of the blades, the flow guide member is arranged at the front side of the vehicle, and the flow guide member has a deflection part from the air inlet to the fan side; the cooling effect of the liquid cooling device of the vehicle at idle speed is improved, and the cooling effect of the vehicle during driving is improved.

This utility model discloses a quick-connect structure for an idle speed shut-off valve assembly, relating to the field of idle speed shut-off valve assemblies. The quick-connect structure includes a shut-off valve assembly and further includes: a mounting base disposed on the shut-off valve assembly; a snap-connect mechanism rotatably connected to the mounting base; the snap-connect mechanism includes a main shaft; a limit block fixedly connected to the main shaft; a snap-connect block fixedly connected to the top of the main shaft; a connecting shaft rotatably connected to the top of the main shaft; a central shaft rotatably connected to the connecting shaft; a snap-connect shaft rotatably connected to the central shaft; and a handle rotatably connected to the central shaft, with a locking hole on the handle. This utility model utilizes the mechanical cooperation between the snap-connect block and the slot, the limit block restricting excessive rotation of the main shaft, and the locking mechanism constraining the handle with a retaining ring. The multiple structures work together to effectively prevent displacement or detachment of the assembly due to vibration, ensuring stable operation of the idle speed shut-off valve assembly and improving equipment reliability.

A method for synchronizing an internal combustion engine in a hybrid vehicle with an electric motor is proposed, comprising the following steps: applying an initial rotational speed setpoint to the electric motor (typically 2500 rpm), then synchronizing the internal combustion engine using the rotational signals from the camshaft and crankshaft. In the event of a camshaft signal failure, an initial position assumption for the internal combustion engine is selected from several possibilities, and injection tests are performed by adjusting the rotational speed setpoints. Once the idle speed setpoint is reached, the rotational speed setpoint of the electric motor is reduced to a new value (typically 2000 rpm). If the assumption is validated, the speed setpoint process is stopped; otherwise, another assumption is tested until a validation is achieved.

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 application discloses a brake gear control method and device of a hydraulic transmission, and belongs to the technical field of hydraulic transmission. The hydraulic transmission comprises an input shaft, an output shaft, four planetary rows and a plurality of brakes. The control method comprises the following steps: in response to a brake gear instruction, the second brake and the third brake are controlled to be combined at the same time; under the brake gear, the sun gear, the planet carrier and the ring gear of the second planetary row and the third planetary row are locked, and then the sun gear, the planet carrier and the ring gear of the fourth planetary row are locked through mechanical connection, so as to lock the output shaft; at the same time, the sun gear, the planet carrier and the ring gear of the first planetary row are in a freely rotatable state, so as to allow the power from the input shaft to idle in the first planetary row. Through specific brake combination control, the application can rigidly lock the output shaft under the engine idle speed state, and fundamentally solves the safety hidden trouble and operation difficulty problem caused by the no-load gear phenomenon in the prior art.

This invention discloses an automatic label sorting device, including a frame with drive rollers movably connected to both ends. One end of the drive roller passes through the frame and is connected to the output end of a motor. A fixed roller is positioned above the drive roller, and symmetrically fitted pressure rollers are mounted on the fixed roller, with the bottom of the pressure rollers abutting against the top of the drive roller. A support plate is positioned at the front of the drive roller, and a second support plate and a movable roller are positioned at the rear of the drive roller. Both ends of the first support plate, the second support plate, and the movable roller are connected to the frame. A die-cutting machine is positioned at the front of the frame, and a conveying assembly and a waste recycling assembly are positioned at the rear of the frame. After the label rolls are die-cut by the die-cutting machine, they are pulled by the drive roller to the movable roller, separating the labels from the label roll waste. The labels are conveyed to the collection platform by the conveying assembly, and the label roll waste is rewound by the waste recycling assembly. This invention can automatically sort and collect labels and label roll waste. The labels move at an idle speed during the conveying process, thus eliminating the need for secondary sorting and collection, resulting in high efficiency.

The application provides a kind of air conditioning system idle speed pressure stable control method and system, belong to automobile air conditioning technical field, the method includes: with three section mode opens infinitely variable fan;Adjust the duty cycle of compressor until the duty cycle of compressor is 100%, complete air conditioning system idle speed pressure stable control.The three section mode is: pulse positioning-open loop drag-closed loop control.The mode of adjusting compressor is incremental, specific signal control is: field control receives control air conditioning opening signal, and is converted into pulse signal and is sent to compressor, after first time interval, field control sends incremental pulse signal to compressor again.The application considers whole vehicle thermal energy management system, through three section mode opens infinitely variable fan, adjusts the duty cycle of compressor, and front strategy, interval strategy and other methods, solves the problem that air conditioning system is frequently started and stopped at different ambient temperature, causes high vehicle energy consumption, poor cabin comfort.

The application discloses an engine, which comprises a cylinder head, an air intake mechanism and an idle speed mechanism, the air intake mechanism comprises a plurality of throttle valve assemblies, the idle speed mechanism comprises an air intake mounting base and a driving mechanism, the air intake mounting base is communicated with the throttle valve assemblies, and the driving mechanism is at least partially located in the air intake mounting base and connected with the air intake mounting base; the air intake mounting base is provided with an idle speed air distribution hole, the idle speed air distribution hole is communicated with the throttle valve assemblies, and the driving mechanism controls the air intake amount of the idle speed air distribution hole by controlling the size of the idle speed air distribution hole; the idle speed air distribution hole comprises a preparation interval and an effective interval, when the driving mechanism passes through the effective interval, the driving mechanism is in an effective stroke, when the driving mechanism passes through the preparation interval, the driving mechanism is in a preparation stroke, the sum of the effective stroke and the preparation stroke is a total stroke, and the ratio of the effective stroke to the total stroke is greater than or equal to 0.9 and less than or equal to 1. Through the above arrangement, the effective stroke of the driving mechanism is increased, and the sensitivity of the idle speed mechanism is improved.

This application provides an engine control method, electronic device, vehicle, and computer-readable storage medium. The engine control method includes: when the engine is idling, acquiring the engine speed to determine the engine's operating state. The operating state includes a normal state and an abnormal state. When the engine is in an abnormal state, first increasing the target idle speed to a gain target speed, and then decreasing the target idle speed to a loss target speed, wherein the target idle speed is used to control engine operation. This application can ensure stable vehicle operation, reduce the requirements for engine operating conditions and external environmental conditions, reduce the adjustment of actual parameters during vehicle operation, improve engine regulation efficiency, and enhance the user's driving experience.

This invention relates to a storage device for a precision PVC film embossing roller. The storage device is used to accommodate a precision PVC film embossing roller in a non-working state. The embossing roller includes a roller body and roller body shafts, wherein the roller body shafts are respectively disposed at both ends of the roller body, and the roller body shafts are provided with mounting grooves. The storage device includes an active part and a driven part. The roller body shafts at both ends of the embossing roller are respectively inserted into the active part and the driven part. The active part drives the embossing roller to rotate, so that the embossing roller can rotate along its own axis when it is not in working state. The active part drives the embossing roller to rotate, so that the embossing roller rotates at an idle speed.

This utility model relates to a high-sealing motorcycle throttle body, including a body, a throttle shaft inside the body, a main channel mounted on the surface of the body, a throttle plate mounted on the throttle shaft inside the main channel, a three-in-one sensor sleeved on one side of the throttle shaft, an idle speed sensor on the other side of the body, a first fixing surface on one side of the body near the three-in-one sensor, the three-in-one sensor including a first housing, a first sealing structure between the first housing and the first fixing surface, a second fixing surface on one side of the body near the idle speed sensor, the idle speed sensor including a second housing, a second sealing structure between the second housing and the second fixing surface, by setting the first and second fixing surfaces on the body, and using the first and second sealing structures between the housings of the three-in-one sensor and the idle speed sensor and these fixing surfaces respectively, the overall sealing performance of the system is effectively enhanced.

This application provides a method, apparatus, vehicle, and storage medium for controlling mode switching. The method, applied in the field of vehicle technology, includes: when the target operating mode of the vehicle is a target idle speed pure electric four-wheel drive mode and the actual operating mode is a target power split mode, controlling the vehicle to switch from the target power split mode to the target idle speed pure electric four-wheel drive mode; during the switching process, if it is determined that the actual gear position of the vehicle's shift synchronizer is neutral, monitoring whether the vehicle's target operating mode has changed to the target power split mode; if the target operating mode of the vehicle is detected to have changed to the target power split mode, interrupting the switching operation to the target idle speed pure electric four-wheel drive mode and controlling the vehicle to switch from the current state to the target power split mode. This method can shorten the mode switching time and improve the vehicle's power response.

The application belongs to the field of internal combustion engine and provides a single gas passage multi-injection hole type gas carburetor. The gas carburetor comprises a body and a throttle valve. The body forms a mixed gas passage for mixing air and gas. The mixed gas passage is provided with an air inlet and a mixed gas outlet at two ends along the axial direction of the mixed gas passage. The body is further provided with at least two gas injection holes on the side wall of the mixed gas passage, which are communicated with the mixed gas passage and used for supplying gas to the mixed gas passage. The gas injection holes are arranged along the axial direction of the mixed gas passage. The throttle valve is arranged in the mixed gas passage and cooperates with the side wall of the mixed gas passage to adjust the opening of the mixed gas passage. When the throttle valve is in an idle speed working condition or a closed state, at least one gas injection hole is located on the side of the throttle valve close to the mixed gas outlet, and at least one gas injection hole is located on the side of the throttle valve close to the air inlet.

The application discloses a torque-based steering control method and an industrial vehicle, and the method comprises the following steps: detecting whether a direction pull rod, an acceleration pedal or a brake pedal is triggered, if yes, setting a rotating speed of a hydraulic motor as a low idle speed of the hydraulic motor, and detecting whether a hydraulic operating rod is triggered, if not, acquiring a torque of the hydraulic motor; if the torque of the hydraulic motor is greater than or equal to a preset torque, setting the rotating speed of the hydraulic motor as a high idle speed of the hydraulic motor; the high idle speed of the hydraulic motor is equal to a sum of the low idle speed of the hydraulic motor and a preset increment rotating speed; the low idle speed of the hydraulic motor is equal to an idle speed set when the direction pull rod, the acceleration pedal or the brake pedal is triggered. The application utilizes torque feedback of the hydraulic motor to determine whether steering is performed, so as to improve the rotating speed of the hydraulic motor and achieve the purpose of steering assistance. Since a steering sensor does not need to be additionally arranged on a steering column or a rated rotating speed needs not to be set, the application has low cost, low energy consumption and does not affect micro-motion operation.

This invention relates to the field of power control and motor applications, and particularly to an integrated motor and integrated motor control method for a six-cylinder engine. The method includes: starting mode control, where the motor's q-axis current is controlled to output a positive electromagnetic torque, driving the engine crankshaft to idle speed; switching from starting to generator mode, where the motor's q-axis current is switched to switch from electric motor to generator when the engine speed reaches idle speed; and switching from generator to assist mode, where the motor outputs a positive assist torque under specific conditions to assist the engine in increasing speed. The invention also includes energy balance control and other steps. Furthermore, it relates to an integrated motor employing this control method. This application achieves the technical effects of switching between three motor modes (starting, generator, and assist), adjusting motor operation according to different operating conditions, optimizing system efficiency, and meeting the vehicle's electrical load and battery charging requirements.

Method for operating a motor vehicle with a drive unit (1), a transmission (2) having several switching elements (9, 10, 11, 12, 13) and an output (14), wherein the transmission (2) is designed as an automatic or automated transmission and is connected between the drive unit (1) and the output (14), wherein in each engaged, friction-fit gear of the transmission (2) a first number of the switching elements (9, 10, 11, 12, 13) of the transmission (2) are closed or engaged and a second number of the switching elements (9, 10, 11, 12, 13) of the transmission (2) are opened or disengaged, wherein, depending on at least one operating condition of the motor vehicle, a coasting mode is entered, and subsequently, depending on at least one operating condition of the motor vehicle, the coasting mode is exited.wherein, to enter the sailing mode of the motor vehicle, starting from a friction-engaged gear, a switching element of the transmission (2) is actuated to open, such that in a non-friction-engaged sailing gear one less switching element is closed and thus one more switching element is open than in a friction-engaged gear, wherein in the sailing mode of the motor vehicle the respective closed and open switching elements of the transmission (2) are changed depending on at least one operating condition of the motor vehicle to maintain the sailing gear, characterized in that, when sailing with the drive unit (1) stationary, it is checked whether a synchronous speed of the friction-engaged gear that is engaged starting from the current actual sailing gear when exiting the sailing mode is above or below a limit value dependent on the fictitious idle speed of the drive unit (1), wherein depending on this,whether the synchronous speed is above or below the limit value dependent on the fictitious idle speed of the drive unit (1), a power transmission type adapted for exiting the sailing mode is selected when engaging the respective power-locking gear.

The application provides a control unit for starting an internal combustion engine of a range-extended electric vehicle, the range-extended electric vehicle comprising an electric motor, a power battery, an internal combustion engine and a generator, wherein the control unit comprises: a receiving module configured to receive a request for starting the internal combustion engine; a judging module configured to judge whether the state of charge of the power battery is greater than or equal to a predetermined threshold; a power control module configured to control the generator to rotate by using the power of the power battery to drive the internal combustion engine to operate when the state of charge is equal to or greater than the predetermined threshold; and a fuel control module configured to control the fuel injection device of the internal combustion engine to not inject fuel into the combustion chamber of the internal combustion engine in a time period when the rotating speed of the internal combustion engine is less than the idle speed of the internal combustion engine. The application also provides a method for starting an internal combustion engine of a range-extended electric vehicle and a computer readable storage medium. The technical scheme of the application can save fuel, reduce cost and reduce emissions.

A method for operating a drive unit for a motor vehicle. The drive unit has at least one internal combustion engine, an electric machine which is or may be drivingly coupled to the internal combustion engine, and a start-up clutch, via which the internal combustion engine and the electric machine are drivingly connected to an output shaft of the drive unit. In a start-up operation mode of the drive unit, the internal combustion engine is operated without ignition when the start-up clutch is open, and is cranked by the electric machine to a start-up speed, which is greater than an idle speed of the internal combustion engine. The internal combustion engine is ignition-operated and the start-up clutch is closed upon reaching the start-up speed. The invention further relates to a drive unit for a motor vehicle.

The motorcycle-type vehicle has a control mechanism for automatically stopping and restarting the engine after automatic stop. When the manual transmission is engaged, the control mechanism restarts the engine based on at least the detection of a throttle opening operation and a clutch disengagement operation. Furthermore, for a predetermined period from the start of restart, if a throttle closing operation is detected, the control mechanism drives the engine at idle speed; otherwise, it drives the engine at a speed corresponding to the operation amount.

Controlling a turbomachine including: the detection of a speed of a drive shaft of the turbomachine below an idle speed; the detection of a saturation of the fuel setpoint; the selection of a combined torque and fuel regulation loop from among at least one single-variable engine regulation loop and, the determination, in a combined manner, of a value representative of a fuel setpoint and of a value representative of a torque setpoint such that the torque setpoint compensates for the saturation of the fuel setpoint to allow the maintenance of a steady-state speed of the turbomachine.

The application provides an idle speed determination method and device, electronic equipment and readable storage medium. The method comprises the following steps: determining an initial idle speed when the APA control is in an activated state, wherein the initial idle speed is greater than a warm-up idle speed of a vehicle; and correcting the initial idle speed based on an influencing factor to obtain a target idle speed, wherein the influencing factor comprises at least one of a slope value, an ambient temperature value and an atmospheric pressure value, the slope value is used to represent a slope value of a road currently traveled by the vehicle, the ambient temperature value is used to represent a temperature value of an environment currently traveled by the vehicle, and the atmospheric pressure value is used to represent an atmospheric pressure value of an altitude currently traveled by the vehicle. The application solves the problems that the oil pressure working interval of the brake system is small and the linearity of the brake system when performing brake pressure control is poor.