36 results about "Shift time" patented technology

Disclosed in the present invention are a gear shifting process control method and system for an electric drive transmission of engineering machinery. The method comprises: in response to having received a gear-shifting signal, acquiring a required gear, a current gear, an electric-motor output torque and a slope signal; on the basis of the electric-motor output torque and the slope signal, determining a gear-shifting load type, and on the basis of the required gear and the current gear, determining a gear-shifting requirement type; if the gear-shifting load type is light- and medium-load gear shifting and the gear-shifting requirement type is an upshift requirement, sending an instruction to execute light- and medium-load upshift control; and if the gear-shifting load type is the light- and medium-load gear shifting and the gear-shifting requirement type is a downshift requirement, sending an instruction to execute light- and medium-load downshift control. During light- and medium-load upshift control or light- and medium-load downshift control, rotation speeds on a pre-clutch side and a post-clutch side are rapidly synchronized, thereby reducing the sliding friction work of a clutch and shortening a gear-shifting time.

The present application belongs to the field of shift control, and specifically provides an AMT natural gas commercial vehicle shift torque control method, device, equipment and storage medium, the method comprising: calculating a predicted shift point and calculating a predicted shift time in real time according to the predicted shift point; adjusting the engine torque after reaching the predicted shift time; the predicted shift time is earlier than the actual shift time; after reaching the actual shift time, the target torque required by the current AMT is calculated, and the current engine torque is monitored at the same time; comparing the error between the target torque and the current engine torque, and adjusting the requested torque in real time by using a PID controller. After the torque reduction starts, the AMT target torque and the current natural gas engine torque during the shift process are compared in real time, the current natural gas engine requested torque is adjusted by PID control, the current natural gas engine torque and the AMT required target torque are changed synchronously, and the torque control hysteresis problem during the shift of the matched AMT natural gas commercial vehicle can be avoided.

The invention discloses a gear shifting detection method of a DCT transmission assembly, which is characterized in that cyclic gear shifting detection is performed on each gear of the DCT transmission assembly at a standard test starting point, and gear shifting parameters such as input rotating speed and gear shifting time are brought into detection, so that the detection of the DCT transmission assembly is more comprehensive, and the detection result is more reliable. A certain judgment logic is added in gear shifting detection, abnormal conditions occurring in the gear shifting detection process can be processed, detection of faults and gear shifting performance which does not reach the standard obviously can be ended in advance, detection resources can be saved, and detection efficiency can be improved; therefore, the problem that the offline detection reliability of a traditional DCT transmission assembly is poor can be effectively solved, the comprehensiveness of detection can be optimized, and the offline quality of the DCT transmission can be improved.

The application provides a gearbox gear control method and device based on dynamic programming. The method obtains front road data and real-time vehicle parameters, calculates torque and speed requirements of the gearbox output shaft, obtains target torque and speed, calculates shift cost at the shift time, including fuel consumption and impact cost, and optimizes the shift cost through a dynamic programming algorithm to determine the target shift path and gear timing data at multiple future times. According to the target shift path and the activation state of the gear selection mode, the recommended gear is determined, and the gearbox optimization shift strategy is controlled. The reasonable gear is planned in advance, the problem that the power loss is caused by the inability to plan in advance according to the road changes in the prior art, and the problems that the economy and shift impact of the vehicle are not considered, resulting in high energy consumption of the vehicle are solved.

The invention relates to a double-electric-drive-axle double-gearbox gear shifting method and system, and belongs to the field of double-electric-drive-axle control. The method comprises the following steps that during static gear shifting, according to a neutral gear returning instruction, a gearbox controller controls an auxiliary box of a corresponding gearbox to execute neutral gear returning operation, and a main box of the gearbox is kept at the current gear; and when the neutral gear is shifted to the starting gear, according to the starting gear shifting instruction, a gearbox controller controls an auxiliary box of a corresponding gearbox to execute starting gear shifting operation, and a main box of the gearbox is kept at the current gear. During operation, the auxiliary box of the corresponding gearbox executes the neutral gear returning operation, the main box keeps the current gear, then when the starting gear is shifted from the neutral gear, only the auxiliary box executes the starting gear shifting operation, half of the gear shifting time is saved, the gear shifting response speed is higher, and the driver feels better.

A method for synchronizing time between a central server and an automated vehicle (AV) includes exchanging a sequence of time synchronization (TS) messages and generating a set of time offsets between a pair of TS messages among the sequence of TS messages. The method further includes changing a system time of the AV using a time drift estimate defined by a set of time weighting models that are a function of at least one of a plurality of time inputs or the set of shift time offset values, and controlling the AV using the system time and one or more shift instructions providing travel commands from the central server.

A method for torque control of an internal combustion engine of a vehicle according to a transmission hydraulic pressure, comprising: providing an internal combustion engine torque converter connected to the internal combustion engine and an automatic transmission of the vehicle, the internal combustion engine torque converter being configured to distribute the torque of the internal combustion engine to the wheels of the vehicle; confirming (S10), by an internal combustion engine torque control device (10), whether a turbine speed differential satisfies an internal combustion engine torque control entry condition during the shifting of the automatic transmission; calculating (S20), by the internal combustion engine torque control device (10), a required turbine torque to prevent a shift shock using at least one of a turbine angular acceleration, a driving resistance torque, or a clutch magnet torque; performing (S30),by the internal combustion engine torque control device (10), using a turbine torque factor learning, as a stored value of the turbine torque factor learning, a result obtained by applying an accelerator pedal value and / or an internal combustion engine torque and / or a transmission fluid temperature at the beginning of the actual shifting operation, to an entry condition of the turbine torque factor learning under the condition that no breakaway occurs during the shifting operation, applying an average turbine acceleration or an average internal combustion engine torque reference reduction to a condition to prevent the turbine torque factor learning, and generating and storing the result of the turbine torque factor learning according to the shift time that started at the actual shift start point, convert (S40), by the internal combustion engine torque control device (10),of the stored value of the turbine torque factor learning into an internal combustion engine torque control value by the required turbine torque, and applying, by the internal combustion engine torque control device (10), the internal combustion engine torque control value to the output of the internal combustion engine.

The present invention relates to an integrated multi-speed electric drive axle assembly, comprising a reducer assembly, a motor assembly, and an electronic control unit; the reducer assembly is connected to the motor assembly, and the motor assembly is controlled by the electronic control unit; the present invention implements a motor-controlled worm gear mechanism through sequential shifting to achieve simultaneous operation of the main / auxiliary speed change mechanisms, effectively reducing the shifting stroke and shifting time, thereby effectively increasing the shifting time interval and significantly improving the shifting efficiency.

The present invention provides a distributed electric truck torque distribution method, which belongs to the field of new energy commercial vehicle control technology. Specifically, it includes: judging based on the current vehicle speed, accelerator pedal opening and its change rate, if the vehicle speed is less than a threshold value or the accelerator pedal opening and its change rate is greater than a threshold value, adopting a dynamic torque distribution control method to adjust the output torque of the middle shaft and the rear shaft; conversely, adopting an economic torque distribution control method to adjust the output torque of the middle shaft and the rear shaft. Finally, it is judged whether the motor speed of the rear axle integrated shift electric drive bridge is within the set shift point speed range. If the motor speed is not within the set shift point speed range, the original torque distribution control method is maintained. If the motor speed is within the set shift point speed range, the shift torque distribution control method is adopted to ensure that when the motor speed of the integrated shift electric drive bridge reaches the shift speed point, the rear axle output torque is zero or the middle shaft output torque reaches the maximum, thereby shortening the shift time and achieving a shift process without power interruption.

The invention relates to a method for calculating a shift time for a gear change in a transmission or a switchable e-axle of a vehicle, wherein a compensation factor for shifts without interruption of traction is calculated, which reduces the predicted shift time for shifts without interruption of traction so that it represents an equivalent to a shift time of a shift with interruption of traction, wherein a virtual shift time for shifts without interruption of traction is calculated, wherein the calculated shift time is compared with shift times of shifts with interruption of traction and is used for gear selection.

The application relates to a multi-working-mode parallel hybrid power system, wherein a second clutch device (13) is arranged in the motor variable speed module, a third clutch device (14) is arranged between the output end of the engine variable speed module and the output end of the motor input gear pair, and the switching of the second clutch device (13) and the third clutch device (14) can realize the switching of different working modes of the hybrid power system; the motor and the engine can be independently shifted, and power transmission is continuously uninterrupted during the shifting process; the pure electric driving capacity is improved, and the starting torque is increased; the engine and the motor are independently driven in the engine and motor independent driving modes, the driving efficiency is higher under high-speed working conditions; power complementation is realized during the shifting process of the motor and the engine, the shifting time requirement is low, and the shifting reliability is high.

The present invention discloses a shift control method and system for an automatic transmission of an automobile. The method comprises: obtaining driving information, wherein the driving data includes driving comfort data, actual driving data, and driver habit information; determining the driver's state based on the driving comfort data; determining whether the shift time needs to be corrected based on the actual driving data, and correcting the target shift time in combination with the driver's state. The present invention corrects the shift time size under consideration of the accelerator pedal opening and its rate of change by integrating operating condition and driver state information, the distance to the preceding vehicle, and the driver's driving state, so as to provide differentiated automatic transmission shift quality, meet the intelligent and variable driver shifting habits, promptly remind the driver and be perceived, and reduce the driver's driving safety risks caused by driving fatigue. The method is low-cost, has strong versatility and portability, and can achieve accurate correction effects through reasonable and simplified judgments.

Method for switching control of a hybrid vehicle, comprising: (a) detecting an internal combustion engine torque; (b) determining a drive torque of an engine clutch based on the engine torque; (c) comparing the determined drive torque and a predetermined permissible transmission torque of the internal combustion engine clutch; and (d) increasing an instantaneous shift time of the engine clutch by a predetermined value when the determined drive torque is greater than the allowable transmission torque, and using the increased shift time.

The invention discloses a planet row structure gearbox gear shifting control method and system and a vehicle, and relates to the technical field of gearbox control, the method is applied to a planet row mechanical automatic gearbox without a synchronizer, and the method comprises the steps that gear and rotating speed information is obtained; calculating an initial target motor rotating speed corresponding to the target gear based on the planet row transmission relation; the initial target rotating speed is corrected according to the rotating speed change relation after gear shifting, upper correction is carried out during gear shifting, and lower correction is carried out during gear shifting; and the motor is controlled to adjust the speed according to the corrected rotating speed, and gear advancing is executed when the real-time rotating speed difference of related parts in the planet row falls into a preset gear advancing synchronization threshold value interval. The system comprises corresponding function modules. For a multi-axle drive vehicle, compensation is also performed based on other axle power disturbances. According to the invention, gear pushing and gear hitting during gear shifting can be effectively avoided, the gear shifting time is shortened, and the gear shifting smoothness and reliability are improved.

A work vehicle has two transaxles carried by a chassis each having wheel end units rotatable to drive ground-engaging members about wheel axes and having electric machines powering transmission configured to effect multiple gear ratios. The electric transaxles are operationally mechanically uncoupled. One or more sensors detect speed, heading, and loading characteristics of the work vehicle. A controller, having memory and processing architecture, is configured to process control to: receive from the one or more sensors input of the speed, heading, and loading characteristics of the work vehicle. The controller determines a shift pair sequence for shifting the first transmission and the second transmission based on the received input of the speed, heading, and loading characteristics of the work vehicle. The shift pair sequence defines a shift time (tS1) for shifting the first transmission and a shift time (tS2) for shifting the second transmission in which the shift time tS1 is the same or different than the shift time tS2. The controller generates a first shift command to shift the first transmission at the shift time tS1 while the second electric transaxle drives the work vehicle and generate a second shift command to shift the second transmission at the shift time tS2 while the first electric transaxle drives the work vehicle.

The invention discloses a full-dimensional intelligent electro-hydraulic power regulation and control system, which relates to the technical field of electro-hydraulic power regulation and control, and comprises a high-torque motor module, a lightweight speed change module, an integrated control module, an electro-hydraulic braking module, a dynamic load adaptation module, an energy recovery optimization module and an ADAS extension module, the high-torque motor module is used for outputting 1150Nm torque by adopting skewed slot winding design, and is matched with a full-skewed-tooth gearbox to reduce tooth surface contact stress; the light-weight speed change module is used for achieving noise reduction through an aluminum alloy shell and a helical tooth structure, recognizing the direction through a current type rotating speed sensor, and compressing the gear shifting time to be within 0.6 s. The integrated control module is used for integrating main motor driving, DC / DC conversion, air pump control and PDU functions and is compatible with range extending and fast charging topology through modular design; the electro-hydraulic brake module is used for decoupling a brake pedal and wheel end oil pressure, and cooperative regulation and control of energy recovery torque and hydraulic torque are achieved through high-pressure response.

The application discloses a self-learning method and device, equipment and a storage medium, and is used for improving the efficiency of vehicle connection self-learning. The application monitors a vehicle, obtains parameter information corresponding to a shift operation if it is determined that the shift operation is triggered, determines a shift speed difference corresponding to the shift operation based on the parameter information, determines whether self-learning of a target working condition corresponding to the shift operation converges according to the shift speed difference, determines a target fuel injection pressure value corresponding to the vehicle based on the shift speed difference if the self-learning does not converge, and updates a current fuel injection pressure of the vehicle according to the target fuel injection pressure value. In the embodiment of the application, whether the self-learning of the target working condition converges is determined according to the shift speed difference, the current fuel injection pressure of the vehicle is updated in the case where it is determined that the self-learning of the target working condition does not converge, and then the shift time can be reduced and the shift process can be optimized.

The electric vehicle (10) of the present disclosure is configured to use an electric motor (2) as a power unit for traveling. The electric vehicle (10) includes an accelerator pedal (22), a sequential shifter (26), and a controller (50). The controller (50) is configured to change a motor torque output by the electric motor (2) in response to operation of the accelerator pedal (22) and operation of the sequential shifter (26). The controller (50) is configured to change a change rate of the motor torque at least twice during a preset shift time in response to the operation of the sequential shifter (26).

The invention belongs to the technical field of transmission devices, and particularly relates to a vehicle driving motor two-gear AMT device and a gear shifting control method thereof.The device comprises a driving motor, a wet friction plate clutch, a one-way overrunning clutch, a synchronizer, a two-gear gear train mechanism and a differential mechanism; the motor control unit MCU, the whole vehicle control unit VCU and the automatic gearbox control unit TCU are integrated on one control chip, gear shifting communication delay is shortened, gear shifting time is shortened, gear shifting of a first gear is achieved through joint action of the synchronizer and the one-way overrunning clutch, it is guaranteed that the gear shifting time is short, meanwhile, gear shifting impact and pause are effectively restrained, and gear shifting efficiency is improved. The friction force of the friction plate and the braking force of the driving motor are controlled to jointly reduce the speed, the target rotating speed is reached at the fastest speed, the problems that a traditional two-gear box is long in downshift time and large in gear shifting pause feeling are solved, and during downshift, the gear shifting time is shortened through the one-way overrunning clutch, and the problems that the traditional two-gear box is long in downshift time and large in gear shifting pause feeling are solved.

The application provides a shift assisting control method of a hybrid vehicle and the hybrid vehicle, and solves the technical problems of energy waste caused by long shift time of the hybrid vehicle in the prior art and shift failure caused by motor failure. The application provides a shift assisting control method of a hybrid vehicle and the hybrid vehicle, the speed of the power input shaft of the gearbox is regulated by regulating the opening of the exhaust throttle valve and / or the valve closing rate, so that the speed of the power input shaft of the gearbox is consistent with the speed of the power output shaft of the gearbox, thereby assisting the shift of the hybrid assembly to realize quick shift, reducing the shift time during the shift, effectively reducing the energy waste caused by long shift time of the hybrid gearbox, and when the motor is used as the drive, even if the motor fails, the shift can still be completed.

A computer system comprising processing circuitry configured to: receive, from an autonomous drive control system, an acceleration request encoding a desired acceleration of an autonomous vehicle having a propulsion source arrangement configured to drive at least one wheel of the autonomous vehicle via a transmission including a plurality of gear-stages; and control the propulsion source arrangement in such a way that the autonomous vehicle accelerates with a greater acceleration than the desired acceleration during at least one acceleration loss compensation time period being separate from at least one gear-shift time period of at least one gear-shift required to fulfill the acceleration request.

An apparatus for diagnosing an automatic transmission for detecting an abnormality during travel of a vehicle, the apparatus including a G sensor configured to measure a vibration signal including a longitudinal vibration signal, a state detection unit configured to obtain the vibration signal of the G sensor and state data of a transmission sensor and an engine sensor of the vehicle, and a controller configured to check an operating element for each shift operation by using a current gear, a target gear, and a shift time detected as the state data, measure the longitudinal vibration signal of the G sensor to calculate a fluctuation level of the longitudinal vibration signal for each operating element, and determine a shift shock event when a longitudinal vibration signal value exceeds a reference value after adjustment based on a travel acceleration of the vehicle.

The invention relates to acceleration control of an autonomous vehicle having a transmission comprising a plurality of gear stages, and specifically, a computer system (13) includes processing circuitry (21) configured to receive an acceleration request (25) from an autonomous driving control system (15), the acceleration request encoding a desired acceleration (ad) of the autonomous vehicle (1), the invention relates to an autonomous vehicle (1) having propulsion source means (17) configured to drive at least one wheel (9) of the autonomous vehicle (1) by means of a transmission (7) comprising a plurality of gear stages; and controlling the propulsion source means (17) such that the autonomous vehicle (1) accelerates at an acceleration greater than the desired acceleration (ad) during at least one acceleration loss compensation period (31a-d) separate from at least one shift period (29a-b) of at least one shift required to fulfill the acceleration request.

The application discloses an electro-hydraulic control system of an automatic gear shifting gearbox and agricultural machinery. The electro-hydraulic control system controls the working state of a hydraulic control valve group through a controller to drive a multi-point positioning gear shifting hydraulic cylinder to move and position between at least five points, thereby driving a gear shifting gear box to cyclically shift at least three gears. The application shortens the gear shifting time, reduces the gear shifting operation difficulty, and realizes the cyclic shifting of three gears or more through a double-rod hydraulic cylinder, which meets the multi-gear shifting function requirement, does not increase the space volume of the gearbox and the gear shifting failure rate, is beneficial to the miniaturization design of the automatic gear shifting gearbox, and improves the working reliability of the automatic gear shifting gearbox.

The embodiment of the application provides an AMT auxiliary shaft brake control system, method and device, to solve the technical problem that the opening time of the electromagnetic valve is difficult to accurately calculate when the existing AMT auxiliary shaft brake, which can easily cause the auxiliary shaft brake to be insufficient or too much, directly leading to the shift time being too long or the shift impact. The system comprises a gearbox oil temperature sensor, a gearbox controller, a PWM intake electromagnetic valve, an exhaust electromagnetic valve, an auxiliary shaft brake pad, an auxiliary shaft and an auxiliary shaft sensor; wherein the auxiliary shaft brake pad is connected to the PWM intake electromagnetic valve and the exhaust electromagnetic valve respectively, the opening degree of the PWM intake electromagnetic valve can be adjusted to change the intake amount and provide different brake forces, and the exhaust electromagnetic valve is used for exhaust pressure relief and brake release. The auxiliary shaft brake can be accurately controlled to avoid insufficient or excessive braking and improve the shift performance.

A 16+16 high-power full-power shift transmission, which consists of a main transmission device and a sub-transmission device. The main transmission device and the sub-transmission device control the engagement and separation of the wet clutch through an electro-hydraulic control shift cylinder, and then through several pairs of gears to achieve the switching of forward gears or reverse gears, and can form a total of 32 gears including 16 forward gears and 16 reverse gears. The power input shaft of the transmission is connected to the output shaft of the main clutch, and the power output end of the transmission is connected to the input shaft of the central drive of the rear axle to transmit the power to the rear axle. All gears of the present invention are power shifts, that is, power interruption-free shifting can be achieved for all gears; the switching of the driving direction of the tractor with a full-power shift transmission can also be power interruption-free, that is, power reversal. The present invention has a compact structure, saves costs, has a short shift time, and greatly improves the operation efficiency.

An apparatus for supporting off-road driving includes a controller configured to receive off-road driving data of a vehicle and control a shift timing of the vehicle according to shift timing control data by applying the off-road driving data to a shift timing control logic, wherein the shift timing control logic may be configured to vary the shift timing according to a possibility of the vehicle stuck in off-road terrain based on the off-road driving data.

The application provides a gear shifting control method, device, equipment and storage medium. The current driving mode and the current gear of a target vehicle are obtained; the current up-down gear working condition of the target vehicle is determined; in the up-down gear working condition, the target gear shifting type coefficient of the target vehicle is determined according to the current driving mode and the current gear; the target gear shifting type coefficient is sent to an automatic gearbox control module, the target gear shifting type coefficient is used to instruct the automatic gearbox control module to determine a gear shifting time according to the target gear shifting type coefficient, and the gear of the target vehicle is controlled according to the gear shifting time. The gear shifting type coefficient is calibrated by the target vehicle controller according to different driving modes and different working conditions, and different gear shifting type coefficients are corresponded to gear times, so that different gear shifting times can be corresponded to different target gear shifting type coefficients, the target vehicle can flexibly select the configured gear shifting style within a certain range, and the individualized setting of gear shifting is realized.

To provide a technology capable of reducing a shift time when accelerator-on operation is performed during a downshift in an accelerator-off state.SOLUTION: An ECU 100 of a vehicle 1 controls a driving state of an engine 10 and a shift stage of an automatic transmission 30. The ECU 100 controls: a determination step of determining whether a downshift occurs in an accelerator-on state during execution of a downshift associated with an accelerator-off state; and a torque-up step of increasing torque on the basis of operation of an electronic control throttle of the engine when the downshift occurs in the accelerator-on state. In the torque-up step, a first throttle torque request amount in a first period up to a start of an inertia phase is made smaller than a second throttle torque request amount in a second period after the start of the inertia phase.SELECTED DRAWING: Figure 2

The invention provides a gear shifting control method and device, a vehicle and a storage medium, the method is applied to the field of vehicles, and the method comprises the steps that in the gear engaging process, if it is detected that a gear shifting motor is in a locked-rotor state, a driving motor is controlled according to a set jitter torque, and according to a set jitter duty ratio, the driving motor is controlled according to the set jitter torque; the gear shifting motor is controlled to conduct position propelling so that the gear shifting motor can drive a gear shifting point to move at the gear shifting ending position; in the process that the driving motor works according to the set shaking torque and the gear shifting motor works according to the set shaking duty ratio, whether the preset condition of continuing gear engaging is met or not within the first preset duration is judged; if the preset condition is met, whether a gear shifting finger reaches the gear shifting ending position or not is judged; and if the gear shifting finger reaches the gear shifting ending position, it is determined that gear engaging is ended. According to the method, after the stalling of the gear shifting motor is detected, the gear shifting duration is shortened, and the gear shifting success rate is increased.