46results about How to "Guaranteed drivability" patented technology

The invention discloses an electric vehicle energy recovery system and a control method thereof. On the basis of the pressure of a brake master cylinder of an electric vehicle, a maximal brake force Fm which is allowed to be applied to a current driving wheel is obtained by calculating according to a brake force distribution curve in an electric vehicle brake system design and a driving wheel locking curve when the electric vehicle travels on a road surface with an ideal synchronous surface adhesion coefficient; and the Fm is converted into a torque, namely a maximal motor brake torque which can be applied currently so that the overall vehicle energy of the electric vehicle can be recovered to the maximum. Simultaneously, the calculated brake torque is corrected according to the requirements on the drivability and the safety of a vehicle, so that brake energy can be recovered to the maximum on the premise of ensuring the drivability and the safety of the electric vehicle.

The invention provides a torque control method in the process of a driving torque of an electric automobile exceeding zero. The torque control method in the process of the driving torque of the electric automobile exceeding the zero comprises the steps of a process for obtaining a driver required torque after flatly sliding, a torque forward direction exceeding the zero working condition judge process, a torque negative direction exceeding the zero working condition judge process, a torque forward direction exceeding the zero control process and a torque negative direction exceeding the zero control process. According to the torque control method in the process of the driving torque of the electric automobile exceeding the zero, under the condition of larger gear meshing gaps being causedby various reasons, on the premise of no physical buffering device existing on a power transmission route, two requirements of weak meshing impact and fast torque response in the process of the torqueexceeding the zero can be well met, and the whole vehicle NVH quality and driving feeling are improved; and meanwhile, the torque control method in the process of the driving torque of the electric automobile exceeding the zero further relieves the requirement on the gear meshing gaps, is beneficial to reducing the gear machining cost, in summary, the torque control method in the process of the driving torque of the electric automobile exceeding the zero can improve the cost and quality competitiveness of the electric automobile, and the significance is very important.

The invention provides a hydrogen fuel-cell vehicle braking energy recovery system. The hydrogen fuel-cell vehicle braking energy recovery system comprises a vehicle control unit VCU, a motor controlunit MCU, a hydrogen fuel-cell sub system FCU, a battery management sub system BMS and a super-capacitor+bi-directional DC sub system SCMS; the VCU collects a motor rotation speed and speed reducer speed ratio information to obtain vehicle speed information, collects a throttle opening signal as an energy recovery triggering switch signal and collects an opening of a brake pedal as a judging basisof recovery power; and then, through the BMS, SOC and maximum rechargeable power of a power battery are obtained; through the SCMS, a capacitance, electric quantity and maximum rechargeable power ofa super-capacitor are obtained; and through the MCU, the motor rotation speed and a motor maximum feedback torque are obtained; and through an FCU, the working state of a fuel cell is obtained; and therefore, braking energy recovery is carried out.

The invention relates to a control method for gear preselection of a dual clutch transmission and a control method for the dual cultch transmission, in particular to a control method used for gear preselection performed on an unengaged shaft of the dual clutch transmission. The control method aims at guaranteeing economical and dynamic requirements of shift points and drivability and comfortableness of the whole vehicle. The control method mainly includes steps: judging a gear needing to be engaged on a target shaft according to the acceleration of the whole vehicle and a currently running gear; calculating the time T needed for reaching an actual shift point of a preselected gear; determining the time T1 needed for completing engagement of the preselected gear according to the rotating speed of the target shaft; determining the time T2 needed for a synchronizer to totally complete engagement of the preselected gear according to positions of the synchronizer; determining a safe time factor T3 according to T1; and adding T2 and T3, and if the sum is equal to T, ordering the synchronizer to start to execute engagement of the preselected gear.

The invention discloses a vehicle self-adaptive speed limiting control method. The method comprises the following steps: reading an actual driving torque, a vehicle speed signal and a slope signal ofthe whole vehicle; using a whole vehicle dynamic model for calculation according to the signals, and calculating a whole vehicle resistance curve of the vehicle, wherein the calculation formula of theresistance curve is F = mg * atan (slope) + mg * atan (slope) * u + 0.5 * Aircd * VehCrossArea * v2 + m * a; carrying out optimal selection through the maximum acceleration under the current vehicleand the preset acceleration with the optimal drivability, and calculating a target acceleration curve; reading a target speed limit value, and selecting a target acceleration at the current vehicle speed from the target acceleration curve calculated in the step according to the target speed limit value; comparing the target acceleration with the current actual acceleration, and calculating the target acceleration for control; the target control torque is reversely recommended through the target acceleration for control, and the actual output torque is limited, so the control target value is converted into the control quantity. When the limit vehicle speed is controlled, a driver can be simulated to predict the state of the whole vehicle in advance, and a good driving effect is achieved.

The invention provides an energy management method, system and equipment of a vehicle-mounted dual-source battery pack and a storage medium. The energy management method of the vehicle-mounted dual-source battery pack comprises the steps that one of a first battery pack body and a second battery pack body is selected according to battery states of the first battery pack body and the second batterypack body to electrify a motor controller, a motor is driven to rotate, and the battery states comprise a failure state and a high voltage feeding state, and whether the residual electric quantity exceeds the electric quantity of a preset electric quantity threshold value or not is further included. According to the energy management method, system and equipment of the vehicle-mounted dual-sourcebattery pack and the storage medium, the range application range of the dual-source battery pack can be expanded, and the conveniences of the dual-source battery pack are improved; and under the premise of ensuring the dynamic property, the economical efficiency and the driveability, the endurance mileage is improved, and the battery pack cost and the total vehicle cost are greatly reduced.

The invention relates to a vehicle with a function of changing the wheel track and chassis height. The vehicle with the function of changing the wheel track and chassis height comprises a vehicle chassis, wheels, a detection device, a control device and multiple execution units, wherein the detection device is used for detecting the pavement condition, the control device is used for receiving a detection signal of the detection device and judging the detection signal to output a corresponding instruction, the execution units are correspondingly connected between each wheel and the vehicle chassis and used for executing the instruction of the control device to adjust the vehicle chassis height and the wheel track in the direction of vehicle width through simultaneous actions, and the detection device comprises a road width detection unit and a roadblock detection unit. The vehicle chassis height and the vehicle wheel track are set to be adjustable, when the vehicle passes different pavements with different road conditions, the vehicle chassis height and the vehicle wheel track can be adjusted according to road condition information, so that the vehicle can pass through the narrow road surface and the road surface with obstacles smoothly, thereby ensuring the driveability of the vehicle.

The invention provides a method and a system for controlling a vehicle. The method comprises the following steps: monitoring a vehicle system; and when a vehicle system failure is monitored and the vehicle is needed to enter a limp state, making the vehicle enter the limp state through exhaust braking. The method and the system can make the vehicle enter the limp state through exhaust braking when detecting that the vehicle system failure can influence any one of the emission performance, the driving performance and the self safety of the vehicle system, and the driving safety of the vehicle. Compared with the prior art, the method and the system can make the vehicle enter the limp state in a more effective mode to further ensure the driving safety of the vehicle, the emission performance of the vehicle, the driving performance of the vehicle, and the self safety of the vehicle more effectively, and improve the usability of the vehicle simultaneously.

The invention relates to an intelligent evaluation system of a safe and civilized driving exam for motor vehicle drivers, and belongs to the mechanical field. The system comprises a vehicle driving simulator, the vehicle driving simulator comprises a vehicle seat which simulates that of a vehicle in real exam, a slot into which a dead bolt of a safety belt is inserted is arranged at one side of the vehicle seat, and the slot is internally provided with a sensor which is used to detect whether the safety belt is inserted. According to the system, the sensor detect whether the safety belts is inserted, and evaluation basis is provided for driving test.

The invention discloses a safe auto parts steering wheel, which comprises a heating block, a heat transfer strip, a wheel rim, an anti-skid cover, a bracket, an alarm, a horn button, a fingerprint anti-theft lock, a heart rate tester, a ventilation fan, a timer, a display screen and infrared rays A detection light, a heating block is arranged in the rim, and the heating block is connected with the heat transfer strip, and the heat transfer strip is arranged inside the rim, and a bracket is provided in the middle part of the rim, and a control switch is provided on the bracket, and a control switch is provided on the rim. There is a non-slip cover, horn buttons and fingerprint anti-theft locks on the bracket, a heart rate tester on the rim, an alarm on the bracket, a ventilation fan embedded in the bracket, a timer on the bracket, and a timer on the bracket. The display screen is provided with an infrared detection lamp on the support, and a mirror is attached on the support. The invention has various functions, avoids freezing of hands to affect driving, improves driving safety and driving comfort, avoids fatigue driving, ensures driving effect and safety, has simple structure, is convenient to use, and is beneficial to popularization.

The invention discloses a new energy automobile sliding control system based on intelligent network connection information, which automatically outputs driver pedal loosening prompt information according to front deceleration scene information through the assistance of an intelligent network connection function, notifies a driver in advance that a pedal can be loosened at proper time for sliding, and after the driver loosens the pedal and enters sliding, an optimal economical vehicle speed curve following the sliding working condition is automatically planned, so that the vehicle travels to a deceleration area in a most energy-saving sliding mode, energy consumption conversion loss caused by the fact that a driver steps on an accelerator in the front section to drive a brake in the rear section is avoided, kinetic energy is recycled as much as possible while the sliding distance is met and drivability is guaranteed, and the endurance mileage of the whole vehicle is increased. On the premise of ensuring drivability and safety, the energy-saving potential of a sliding deceleration scene is embodied to the maximum extent, the energy-saving and emission-reducing effects of the vehicle are effectively improved, and the driver is liberated from paying attention to anxiety during deceleration. The invention further discloses a new energy automobile sliding control method based on the intelligent network connection information and a new energy automobile.

The invention discloses a clutch control method and system of a wet-type dual-clutch transmission under an idling working condition. The clutch control method is executed by a gearbox controller and comprises the steps that under the condition that a clutch is located at a semi-joint point, if a clutch complete separation condition is met, the clutch is controlled to be completely separated, and if the clutch complete separation condition is not met, maintaining the clutch in a semi-joint state is carried out; and under the condition that the clutch is completely separated, if the clutch complete separation quitting condition is met, the clutch is controlled to be at the semi-joint point, and if the clutch complete separation quitting condition is not met, the clutch is kept in a completeseparation state. By adopting the clutch control method and system of the wet-type dual-clutch transmission under the idling working condition, the starting and climbing response can be ensured, and meanwhile, the fuel consumption increased due to the dragging load of the clutch during idling can be reduced.

The invention provides a clutch control method in the vehicle braking and parking processes. The clutch control method comprises the steps that monitoring information is monitored in real time and comprises a gear state, a braking signal, the maximum clutch pressure in the preset time before the monitoring time, the clutch rotating speed, the engine rotating speed and the engine target idling speed; if the monitoring information monitored at the current monitoring time meets all pressure dynamic compensation determination conditions, command pressure of a clutch meeting the compensation determination conditions is compensated; and when the monitoring information monitored at the current monitoring time meets any pressure dynamic compensation exiting determination condition, the command pressure of the compensated clutch stops being compensated. Through real-time compensation of the command pressure of the current clutch, torque transmission of the current working clutch is controlled precisely, and thus a vehicle has good driving performance.

The invention relates to a carburetor for an outboard motor equipped with a rapid acceleration and thickening device, which comprises a carburetor body in which a mixing chamber and a float chamber are arranged. The carburetor body is provided with a rapid acceleration and thickening device. The rapid acceleration and enrichment device includes a pressure-taking pipe communicated with the mixing chamber, and an acceleration pump cover cavity communicated with the pressure-taking pipe. A diaphragm and a diaphragm return spring are arranged in the cavity of the accelerator pump cover. One end of the diaphragm return spring is pushed against the inner wall of the negative pressure chamber, and the other end of the diaphragm return spring is pushed against the diaphragm. There is an oil inlet hole in the middle of the partition between the diaphragm chamber and the float chamber. Equipped with a one-way valve. The lower part of the diaphragm cavity is provided with an oil outlet, and the oil outlet is connected with an oil outlet pipeline, and the oil outlet pipeline communicates with the throat of the carburetor body. In the design of the carburetor of the present invention, a rapid acceleration thickening device is added to force a certain amount of fuel to be sprayed into the mixing chamber during rapid acceleration, thereby ensuring the normal drivability of the outboard motor with a rapid fuel throttle.

The invention relates to control methods for dual clutch transmissions, particularly to a control method for gear pre-selection for an uncombined shaft of a dual clutch transmission and aims at providing the method capable of guaranteeing economy and dynamic property requirements of shift points as well as whole drivability and comfort of a whole vehicle. The control method mainly comprises the steps of judging gears to be combined on a target shaft according to the whole acceleration and the current operating gear; calculating time T required for arriving at actual shaft points of pre-selected gears; determining time T1 required for completing combination of the pre-selected gears according to the rotating speed of the target shaft; determining time T2 required for completely finishing the combination of the pre-selected gears by a synchronizer according to the position of the synchronizer; determining a safety time factor T3 according to the T1, adding the T2 and the T3 together, and if the sum is equal to the T, commanding the synchronizer to begin to execute combination of the pre-selected gears.

The invention discloses a multi-propeller flying car. The multi-propeller flying car comprises a car body, a power device, a foldable wing, a retractable propeller, an empennage and direction-changeable air jetting devices. The car body is of a streamlined design. The power device is internally arranged in the front portion of the car body. The foldable wing is fixed to the middle portion of the car body, and a foldable propeller is mounted at the top end of the foldable wing. The retractable propeller is mounted at the top of the car body. The retractable propeller is provided with a telescopic device, and a foldable propeller is mounted at the top end of the telescopic device. The empennage is mounted on the tail portion of the car body. The direction-changeable air jetting devices are mounted on a chassis of the car body. The power device provides power for the multi-propeller flying car. The multi-propeller flying car ensures the flexibility and driving performance of the car on the land, and can take off vertically.

The invention discloses a rear mud guard used for a motorcycle. The rear mud guard comprises a mud guard body which is arranged on the rear portion of the motorcycle and located above a rear wheel of the motorcycle in a covering mode, the mud guard body is of a curved-plate structure with the curvature radius larger than the outer circle of the rear wheel of the motorcycle, the outer surface of the mud guard body is a smooth curved surface, mounting support lugs used for being connected with a motorcycle body are fixed to the upper portion of the mud guard body, overturned edges are arranged at the edges of the two sides of the inner wall of the mud guard body, and a helical diversion trench is formed in the inner wall of the mud guard body in the longitudinal direction. By means of the rear mud guard, muddy water adhering to the rear wheel of the motorcycle can be prevented from being splashed to the bottom of a saddle support when a person rides the motorcycle in a rainy day, flowing everywhere and dripping, cleanliness of the motorcycle body and driving performance are guaranteed, and the rear mud guard is simple in structure, convenient to machine and manufacture and low in cost.

The invention discloses a vehicle as well as an axle thereof and a differential mechanism. The differential mechanism comprises a driven disc, two semi-shaft connectors and two groups of connection devices, wherein the inner circumferential surface of the driven disc is a first contact surface; the outer peripheral surfaces of the semi-shaft connectors are second contact surfaces; one second contact surface is a ring surface, and the other second contact surface is a polygonal surface; each group of the connection devices comprises a rolling part, a rolling retainer, a switching driving part, a switching driven part and a first elastic resetting mechanism; the rolling part and the ring surface have a separation position and a connection position; the switching driving part selectively drives the switching driven part to move; the first elastic resetting mechanism moves from the separation position to the connection position and is used for enabling the rolling part to return to the separation position from the connection position. Therefore, the differential mechanism can control the switching from a two-drive mode to a four-drive mode and control the switching from the four-drive mode to the two-drive mode; the connection devices can be switched flexibly; and the switching stability is good.

The invention provides a torque control method for a Miller cycle engine. The method comprises the following steps that: an oil consumption emission Gaussian model is established; Miller cycle enginetorques, throttle opening degrees, air incoming VVT angles, ignition angles, corresponding instantaneous oil consumption and instantaneous pollutant emissions under different loads and rotating speedsare collected with a set engine working condition point sampling frequency, so that a Gaussian model of relationships among the Miller cycle engine torques, the throttle opening degrees, the air incoming VVT angles, the ignition angles, the instantaneous oil consumption and the instantaneous pollutant emissions is established; an optimization rule of torque control is established, specifically, an optimization rule of the target torque control of the Miller cycle engine is determined; and global optimization of a torque control strategy is performed, specifically, the target torque and parameter control target of the engine are determined according to the total required torque of the engine, the Gaussian model and the optimization rule. The invention further provides a torque control device for a Miller cycle engine. The oil consumption and pollutant emissions of the hybrid power Miller cycle engine are optimized through a Gaussian model prediction method.

The invention provides a computing method for the heat management available power, a heat management controller and a heat management system. The heat management system comprises the heat management controller, the heat management controller uses the computing method to compute the heat management available power under the limiting working condition, computing of the drive available power is comprehensively considered while the heat management available power is computed through the computing method, and the heat management available power adopts a first-order low-pass filtering algorithm, and the size of the filtering parameters depends on that of the drive demanded power variation rate; and the drive available power limit coefficient adopts a PI algorithm, and the parameter P and the parameter I vary from the difference value of the drive available power and the actual drive power. By adoption of the computing method provided by the invention, under the limiting working condition, on the basis of the condition that the vehicle security requirement is met, driveability can be ensured to a largest extent, and power battery over discharge is avoided.

The invention provides an active suspension control system and method, and relates to the technical field of automobiles. The active suspension control method comprises an information acquisition vehicle, a current driving vehicle and a cloud platform; the information acquisition vehicle is used for acquiring first road surface smoothness information, and sending the first road surface smoothness information to the cloud platform; the cloud platform is used for receiving the first road surface smoothness information sent by the information acquisition vehicle and sending the first road surface smoothness information to the current driving vehicle; and after the current driving vehicle receives the first road surface smoothness information sent by the cloud platform, target damping force used for controlling an active suspension system is determined according to the first road surface smoothness information. According to the embodiment of the invention, the active suspension system is controlled through the road surface smoothness information obtained from the cloud platform, so that the problem of control hysteresis is effectively solved, and the drivability and comfort of the vehicle are ensured.

The invention relates to the technical field of electric automobiles, in particular to an inverter output control method and device of an electric automobile and the electric automobile. The method comprises the steps that whether a vehicle-mounted charger of the electric automobile is connected with an inverter gun or not is detected; when the inverter gun connection signal is detected, the electric vehicle is controlled to exit the driving mode, and an electronic parking braking system of the electric vehicle is pulled up; and a vehicle-mounted battery of the electric vehicle is controlled to supply power to the external equipment at the target output voltage, and power supply is stopped when the actual electric quantity of the vehicle-mounted battery reaches the inversion discharge cut-off electric quantity. Therefore, the problems that in the prior art, the electric automobile cannot supply power to external equipment, and the power utilization convenience is poor are solved.

The present invention provides an energy management method, system, device and storage medium for a vehicle-mounted dual-source battery pack, wherein the energy management method for a vehicle-mounted dual-source battery pack includes: selecting one of the battery packs according to the battery status of the first battery pack and the second battery pack Once the motor controller is powered on to drive the motor to rotate, the battery status includes fault status, high voltage status and whether the remaining power exceeds the preset power threshold. The invention can expand the scope of application of the dual-source battery pack, improve the convenience of the dual-source battery pack, and improve the cruising range under the premise of ensuring power, economy, and driving performance, and greatly reduce the cost of the battery pack and the cost of the entire vehicle. the cost of.

The invention provides a novel four-drive hybrid power system and further provides a novel four-drive hybrid power driving method. The novel four-drive hybrid power system comprises an engine, an automatic transmission, a first motor, a battery, a first power battery, a second power battery, a second motor and a reducer. The engine is connected with a front driving shaft of a vehicle through the automatic transmission to drive front wheels of the vehicle; the engine is connected with the first motor; the first motor is connected with the first power battery; the first power battery is connected with the second power battery; the second power battery is connected with the second motor; the battery is connected with the first power battery and used for meeting the requirements of electric appliances for a voltage platform of the vehicle; and the second motor is connected with a rear driving shaft of the vehicle through the reducer to drive rear wheels of the vehicle. The four-drive function can be achieved, and front and rear power assemblies can output torque as required, so that the vehicle obtains the optimal power combination, the dynamic property of the vehicle is remarkably improved, meanwhile, the economical efficiency is excellent, and energy saving and environmental protection are achieved.

The invention provides a pure electric vehicle torque cross-zero torque control method, which includes obtaining the smoothed driver demand torque process, the torque positive cross-zero working condition judgment process, the torque negative cross-zero working condition judgment process, and the torque positive cross-zero working condition judgment process. The control process of crossing zero and the negative torque crossing control process; this method can solve the problem of torque very well under the premise that there is no physical buffer device on the power transmission path when the gear meshing gap is slightly large due to various reasons. The two requirements of weak meshing impact and fast torque response in the process of crossing 0 can improve the NVH quality and driving experience of the vehicle; at the same time, this method also reduces the requirements for the gear meshing clearance, which is also beneficial to reduce the cost of gear processing. , this method is of great significance for improving the cost and quality competitiveness of electric vehicles.

The invention discloses a grouping pushing-sliding control system and method for intelligent hydraulic supports. The grouping pushing-sliding control system and method are suitable for pushing-sliding of the hydraulic supports of a fully-mechanized coal mining face under a coal mine. The system comprises distributed hydraulic support controllers and a hydraulic support remote monitoring system. Distributed hydraulic support controllers in the mining face are connected through a CAN bus and a TCP Ethernet, and connected with the hydraulic support remote monitoring system. Depending on a hydraulic support pushing-sliding curve stored in the system, the hydraulic supports can be divided into sections, parallel grouping control is performed inside each section, the number of grouped supports is set automatically depending on the driving pressure limit of a hydraulic pump, on the premise of guaranteeing drivability, the operation processes of grouping pushing-sliding control are simplified, the pushing-sliding efficiency is improved to the maximum degree, and the amount of repetition labor is reduced for an operator.

The invention provides a speed planning method and system for a hybrid vehicle. According to the method and system, a deceleration area in real time is detected in a driving process, and the distance S between the hybrid vehicle and the deceleration area is obtained; a sliding distance S0 is calculated according to the current speed of the hybrid vehicle and the predicted speed of the deceleration area, and when S0 is larger than or equal to S, a driver is reminded to control the hybrid vehicle to slide; after the hybrid vehicle starts to slide, since the hybrid vehicle cannot reach the deceleration area through pure sliding at the moment, energy recovery needs to be carried out to increase deceleration. According to the method and system, an evaluation function is formulated according to an energy recovery maximization principle to calculate an optimal recovery starting moment and an optimal motor torque sequence; the motor torque of the hybrid vehicle is controlled according to the optimal motor torque sequence, and energy recovery is started at the optimal recovery starting moment, so that the drivability and the safety are ensured, energy conversion loss is reduced, and energy conservation and emission reduction effects are improved.

The invention discloses a powertrain control method for reducing torsional vibration of a drive train, belonging to the technical field of passenger car automatic transmission control technology or clutch control technology. Torsional amplitude value of each accelerator opening; Step 2: Determine the gear, rotational speed, and throttle opening range where the torsional amplitude value exceeds the standard according to the test results of Step 1; Step 3: Determine the torsional amplitude of the drive train after adding slip-friction compensation of different clutches value up to the standard; Step 4: Determine the maximum transmission torque under this slip and friction difference according to the slip and friction difference determined in Step 3 and the heating characteristics of the clutch; Step 5: Determine the corresponding accelerator according to the maximum transmission torque in Step 4 Adjust the clutch slip control and transmission shift control according to the opening range and speed range; Step 6: According to the maximum transmission torque in Step 4, determine the corresponding throttle opening range and speed range, and adjust the torque output characteristics of the engine.

A vehicle adaptive speed limit control method, comprising the steps of: reading the actual driving torque, vehicle speed signal and slope signal of the vehicle, and using the vehicle dynamic model to calculate according to the signal, calculating the vehicle resistance curve of the vehicle, The calculation formula of resistance curve is F=mg*tan(slope)+mg*tan(slope)*u+0.5*AirCd*VehCrossArea*ρv 2 +m*a; Optimally select the maximum acceleration under the current vehicle and the acceleration of the preset best drivability, and calculate the target acceleration curve; read the target speed limit value, and calculate it in the step according to the target speed limit value Select the target acceleration at the current vehicle speed from the target acceleration curve; then compare the target acceleration with the current actual acceleration to calculate the target acceleration for control; use the target acceleration for control to recommend the target control torque to limit the actual output torque. Convert the control target value into the control quantity. When the limit speed is controlled, it can simulate the driver to predict the state of the vehicle in advance to achieve a good driving effect.