62 results about "Downshifting" patented technology

This invention provides a control method and apparatus for a dual-clutch transmission. During vehicle coasting, it detects in real-time whether there is a need for braking downshifting. If a braking downshifting need is detected, it determines whether the need is for multiple gear downshifts. If it is, it collects current operating condition information and, based on this information and the target gear, controls the torque of the target clutch in the dual-clutch transmission to maintain the target torque until the vehicle downshifts from the current gear to the target gear. If the need is for a single gear downshift, it uses a coasting-without-throttle downshifting method to downshift from the current gear to the target gear. Based on this invention, it not only solves the problems of jerking caused by untimely downshifting and frequent clutch interaction when braking hard during coasting, but also addresses the issue of weak throttle response after braking during coasting.

An automotive electronic longitudinal dynamics control system of a motor vehicle comprising a powertrain comprising a propulsor electronically controlled by an electronic engine control module and an automatic transmission electronically controlled by an electronic automatic transmission control module to transmit mechanical power generated by the propulsor to drive wheels of the motor vehicle and comprising an automatic gearbox having a plurality of gears with corresponding gear ratios. The electronic automatic transmission control module is designed to output data indicative of a currently engaged gear and a next engaged gear that will be engaged after the currently engaged gear. The electronic engine control module is designed to receive data indicative of an engine torque request and to responsively control the propulsor based on the received engine torque request to cause the propulsor to output an engine torque equal to the requested engine torque. The automotive electronic longitudinal dynamics control system is designed to:receive from the electronic automatic transmission control module data indicative of the currently engaged gear and the next engaged gear that will be engaged after the currently engaged gear;receive a reference longitudinal acceleration to be followed and a measured longitudinal acceleration;compute an engine torque request for the electronic engine control module based on a longitudinal acceleration error indicative of a deviation of the measured longitudinal acceleration from the reference longitudinal acceleration, on a control law and on the currently engaged gear and the next engaged gear.

The present invention proposes a shift strategy design method for a binary logic automatic transmission (BLT). This method is used to determine the target gear for the current shift of a BLT, thereby improving the shift performance of the automatic transmission and, in turn, the power and economy of vehicles equipped with BLTs. Specifically, the method comprises: first, collecting the input shaft speed and throttle opening of the automatic transmission; when the collected input shaft speed is greater than a set upshift threshold, an upshift condition is triggered; when the input shaft speed is less than a downshift threshold, a downshift condition is triggered; after the upshift condition is triggered, the maximum target gear for upshifting is first calculated, and then the gear with the least components switched during the shift is selected between the current gear and the maximum target gear for upshifting as the current target gear; after the downshift condition is triggered, a preset throttle opening-shift speed table is queried based on the current throttle opening to determine the shift speed, and sequential downshifting is performed when the input shaft speed is less than the shift speed.

The invention provides a control device suitable for a bicycle provided with a rest handle. The control device is suitable for being attached to a handle main body of a rest handle, and is provided with a mounting base which is constructed to be suitable for being mounted to a free end of the handle main body; the electric control component is arranged on the mounting base and comprises an upshift control part and a downshift control part; and the operation component is movably connected to the mounting base and comprises an upshift operation part correspondingly touching the upshift control part and a downshift operation part correspondingly touching the downshift control part. The operating component is pivotally connected to the mounting base around a set axis, and the upshift operating part and the downshift operating part are arranged on the upper side and the lower side of the set axis, so that one of the upshift operating part and the downshift operating part can be operated by a downward pressing action, and the other one can be operated by an upward shifting action. Efficient and accurate control over upshift and downshift operation can be achieved, and meanwhile the integration level and the ergonomic performance are improved.

The invention belongs to the technical field of traditional automobiles, and particularly relates to a clutch pre-separation method for power downshift of an automatic transmission of a vehicle, which comprises the following steps: S1, acquiring state data of the vehicle; s2, predicting whether power downshift occurs or not; if so, turning to S3; otherwise, returning to S1; s3, the clutch is controlled to execute torque reduction according to the preset torque slope, and clutch separation is conducted; a closed-loop control strategy is used in the clutch separation process, and the rotating speed difference between the engine and the input shaft is controlled to change towards the target rotating speed difference; s4, if a downshift instruction is received within a preset duration after the pre-division strategy is started to be executed, turning to S5; if not, turning to S6; and S5, the pre-division strategy is ended, the downshift control operation is executed, and after the downshift control operation is completed and the normal driving state is recovered, the step S1 is executed again. And S6, recombining the clutch, and returning to S1 after the normal driving state is recovered. According to the method, gear shifting smoothness and response speed can be improved, and meanwhile abrasion of mechanical parts is reduced.

A dynamic protection control method, control system and lifting equipment for a lifting device. The control method includes: during driving braking, a braking acceleration acquisition system collects the vehicle braking acceleration generated by an electronic braking system to ensure that, within the allowable braking distance, the vehicle braking acceleration is less than the tipping acceleration, thereby dynamically limiting the maximum driving speed at which the equipment is allowed to operate. When the speed exceeds the maximum allowable operating speed, operations such as engine deceleration and gearbox downshifting are performed, and at the same time, the electronic braking force is restricted by an actuator to ensure smooth deceleration braking of the equipment. The steering acceleration acquisition and control system, a steering acceleration sensor collects the steering acceleration in real time and calculates the allowable steering speed of the steering wheel, so as to achieve the consistency between the steering speed of the steering axle and the driving speed. The present invention can achieve the purpose of intelligent dynamic anti-tipping of the crane and has a good protection effect on both people and objects.

A vehicle includes a powertrain with a prime mover, a transmission with a number of gears, and foundation brakes. The speed of the vehicle along a downhill route segment is automatically controlled toward a target speed by prioritizing the use of engine braking power and gear downshifting in the transmission over application of the vehicle's foundation brakes.

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 invention relates to the technical field of intelligent vehicle control, in particular to a steering wheel heating method and device, a vehicle and a storage medium. The method comprises the steps that heating of a steering wheel is started based on a starting instruction, and heating output is conducted on the steering wheel based on an initial heating gear; and in the heating process, the first actual temperature of the steering wheel is obtained, the first actual temperature is compared with a first target closing temperature threshold value corresponding to the initial heating gear, and if the first actual temperature is larger than the first target closing temperature threshold value, the initial heating gear is adjusted based on a preset downshift strategy, and / or the initial heating gear is adjusted based on the preset downshift strategy. And stopping heating the steering wheel. Therefore, the problems of low adjustability, low intelligent degree, high cost and the like of a steering wheel heating strategy in the related technology are solved, the self-adaptive downshift strategy based on the temperature rise time is introduced, intelligent control over heating of the steering wheel is achieved under the condition that hardware does not need to be changed, and the heating efficiency of the steering wheel is improved. The comfort level of a user is improved, and the energy utilization efficiency is remarkably improved.

The utility model relates to the field of automobile structure design, and discloses a wheel package integrated type footrest structure which comprises a wheel package, a footrest portion is formed on the wheel package, the distance between the footrest portion and a clutch pedal is smaller than or equal to 130 mm, the footrest portion is a plane, and the included angle between the plane where the footrest portion is located and the horizontal plane is 45-65 degrees. By forming the footrest part on the wheel bag, compared with an independently-arranged footrest pedal, the situation that the footrest pedal is mistakenly regarded as a clutch pedal to cause mistaken treading and delay of processing time in an emergency can be avoided, for example, when the vehicle needs to cross a steep slope, the speed of the vehicle needs to be guaranteed firstly to enable the vehicle to have certain inertia, and when the inertia is finished, the footrest pedal is mistakenly regarded as the clutch pedal to cause mistaken treading and delay of processing time can be avoided. Emergency gear shifting is needed, the torque of wheels is increased through downshifting, the working state of an automobile is switched, the phenomenon that the automobile slides is avoided, and meanwhile the situation that four pedals or three pedals occur in an automobile cab due to the fact that an independent rest pedal is additionally modified, so that a person unfamiliar with the automobile operates by mistake, and safety accidents are caused is avoided.

An in-vehicle control device is configured to be installed in a vehicle including an engine, a transmission configured to change speed of motive power of the engine and perform output to a drive shaft connected to a drive wheel, an electric motor configured to input and output motive power to and from the drive shaft, a power storage device configured to input and output electric power to and from the electric motor, and a steering device. The in-vehicle control device includes a processor, and the processor is configured to, at a time of driving force increase request when a driving force increase request is made to bring the vehicle into a predetermined target state during the automated driving control, give priority to driving force increase from the electric motor without downshifting the transmission, over driving force increase that involves downshifting the transmission.

The invention discloses a gear adjusting method and device of an electric vehicle, electronic equipment and a storage medium, and relates to the technical field of electric vehicle detection. The gear adjusting method of the electric vehicle comprises the steps that based on the accelerator opening degree of the electric vehicle, the tire rolling radius of the electric vehicle, the actual vehicle speed of the electric vehicle in the running process and the speed ratio of a gearbox of the electric vehicle under the virtual gearbox gears, the virtual rotating speed of the electric vehicle under the virtual gearbox gears is determined; on the basis of the accelerator opening degree, the virtual rotating speeds and the fuel vehicle torque fluctuation function relation, the reference torque under the virtual gearbox gears is determined; and determining a target virtual rotating speed and a target torque corresponding to the target virtual rotating speed based on a gear lifting request of the electric vehicle and the reference torque under each virtual gearbox gear. According to the method and the device, the switching perception of upshift and downshift of the fuel vehicle under different gears can be simulated through step control on the target torque, so that the user experience is improved.

To provide a hybrid vehicle control device capable of achieving both improved acceleration feeling and reduced vibration.SOLUTION: When a control device of a hybrid vehicle in which an engine and a motor are connected to an input side of an automatic transmission causes the motor to assist in rotation synchronization in downshifting of the automatic transmission in response to a driver's acceleration demand, the control device calculates a release change rate of a clutch mechanism included in the automatic transmission and time required to achieve a reduction to torque capacity in an inertia phase. Then, the control device limits an increase rate so that assist torque can be changed to an upper limit within the time.SELECTED DRAWING: Figure 2

The present application relates to the technical field of vehicles, and specifically discloses a shift method and device for protecting vanadium-based SCR, a vehicle and a storage medium, wherein the shift method for protecting vanadium-based SCR, after determining that a temperature protection condition judgment enabling condition is met, obtains an actual temperature upstream of the SCR, a target temperature of an SCR temperature control model, a change rate of the target temperature, and road condition information in a set region in front of the vehicle; then, whether the temperature protection condition is met is evaluated based on the actual temperature upstream of the SCR, the target temperature, the change rate of the target temperature and the road condition information, and when the temperature protection condition is met, the gear of the vehicle is downshifted, and the SCR temperature is increased through downshifting, thereby preventing the leakage of vanadium-containing compounds. When judging whether the temperature protection condition is met, the shift method for protecting vanadium-based SCR simultaneously refers to the actual temperature upstream of the SCR, the target temperature and the change rate of the target temperature, can objectively reflect the current state of the SCR, and ensures the accuracy of the control result.

The present disclosure relates to a vehicle control method, device, equipment and medium, and relates to the technical field of vehicles, and includes: in the process of downshifting of a vehicle, when a target gear of the vehicle is the second forward gear or a current gear is the second forward gear, detecting whether a preset output shaft speed switching condition is met; when it is detected that the output shaft speed switching condition is met, calculating a first output shaft speed based on a vehicle speed by an anti-lock braking system or a vehicle body electronic stability system of the vehicle; when the first output shaft speed meets a preset downshifting condition, controlling the vehicle to switch to a target gear or a preset gear; wherein the gear number of the preset gear is less than the gear number of the current gear. By using the above technical solution, the technical problem that the output shaft speed abnormally fluctuates due to hardware reasons when the vehicle is stationary, so that the downshifting point cannot meet the downshifting requirement and downshifting processing cannot be performed is solved, and downshifting is forcibly performed under the condition that the current vehicle downshifting condition is met.

A method for controlling an automatic transmission of a vehicle. The method includes operating the transmission in an automatic mode whereby gear shifting of the transmission is performed automatically based on a speed of the vehicle; receiving a shifting request from a user-operated gear shifter to either: (i) upshift the transmission from a current gear to a higher gear; or (ii) downshift the transmission from the current gear to a lower gear. In response to the shifting request, the method continues with operating the transmission in a semi-automatic mode whereby gear shifting is based on user-generated shifting requests; performing the upshift or the downshift according to the shifting request; monitoring a speed of an engine of the vehicle; and in response to the speed being at a lower speed limit or an upper speed limit, returning operation of the transmission to the automatic mode.

The invention relates to a method for controlling a road vehicle (1) having a servo-assisted gearbox (7) during a deceleration phase, the control method comprising the following steps when the servo-assisted gearbox (7) is in an automatic operating mode: assuming that the depression of a brake pedal (23) remains constant, calculating a release time interval required for the road vehicle (1) to reach a release speed for eventually releasing a clutch (16) of the servo-assisted gearbox (7); calculating the number of downshifts that can be performed within the release time interval based on the time required to perform the downshift; planning a downshift to be performed from the current gear engaged in the servo-assisted gearbox (7) to the release gear through which the clutch (16) of the servo-assisted gearbox (7) is eventually released, so that no more than the number of downshifts that can be performed within the release time interval is performed; and performing the planned downshift.

The invention discloses a torque increasing control method for power downshift of an automatic transmission, and belongs to the technical field of automatic transmissions. The method comprises the following steps: triggering torque increasing control: judging whether entering conditions are met or not according to an accelerator and torque; executing torque increasing control: on the basis of the current actual torque, increasing to a torque increasing target peak value at a first calibration slope; the torque increasing target peak value is kept until the rotating speed synchronization process of gear shifting starts; reducing the torque rise target peak value to 0 at a second calibration slope; and outputting the sum of the torque increasing absolute value and the target torque value to an execution module as a torque increasing request value. And compensating a torque increasing value. And the torque rise control is quitted. The rotating speed of the output shaft is stable in the gear shifting process, the vehicle speed is basically unchanged, impact is reduced, and driving smoothness is improved; power requirements are accurately matched, smooth power connection before and after gear shifting is guaranteed, and smoothness and power performance are both considered; and the torque increasing absolute value can be corrected in real time, torque waste is avoided, and the balance between the power performance and the fuel economy is assisted.

The application provides a vehicle brake energy recovery control method, device and vehicle. When the vehicle is in a brake energy recovery state, the method responds to a received gear reduction request of a transmission, and then controls a power system to perform brake energy recovery according to a brake energy recovery request value sent by a chassis system. Further, current gear information of the transmission in the gear reduction process is obtained, wheel end torque is determined based on the current gear information and a current input shaft torque, and then a brake energy recovery execution value is determined according to the wheel end torque, which is sent to the chassis system to make the chassis system feedback an execution result. The execution value is determined based on actual gear shifting process information of the transmission, the accuracy of the execution value fed back to the chassis system is ensured, the problem that the brake energy recovery function is reported as an error and disabled in the prior art is solved, and normal operation of the function is ensured.

When the shift position of the automatic transmission is the forward traveling position, it is determined that the sport traveling is being performed, and when it is determined that the permission condition is satisfied, the automatic transmission is downshifted. Thus, the downshift is performed during the execution of the sport running, and the driving torque is easily secured. Further, since the present disclosure is limited to the case where the permission condition is satisfied, for example, the downshift is not executed in a state in which the sideslip suppression control is activated. Therefore, it is possible to easily secure the driving torque while suppressing an unnecessary downshift when the sport travel is executed. It is easy to control the vehicle attitude during the execution of the sport running. In addition, the acceleration performance of the rising edge after the turning is improved.

A method comprising: Controlling torque generation by an internal combustion engine of a vehicle so that a first torque is generated in an n-th gear before a downshift, which is determined according to a gearshift pattern of the vehicle, wherein the first torque is 100% of the torque available to the engine at a given accelerator pedal position and a given engine speed (rpm) (S415); Calculating a second torque that causes a predefined increase in engine power output based on a first engine power output that occurs when the engine produces the first torque at the given accelerator pedal position and the given speed (rpm) (S420); and Controlling the torque generation by the engine so that the second torque is generated in an (n-1)th gear after the downshift.

The invention relates to the technical field of new energy vehicle control, and particularly discloses a novel gear locking control method for an automatic transmission new energy vehicle, which comprises the following steps of: establishing a gear locking identification and execution system which comprises a transmission control unit (TCU), an electronic gear shifter, a vehicle control unit (VCU) and a motor control unit (MCU); an automatic gear lever climbing function key of the electronic gear shifter is redefined as a gear locking key; when the vehicle is in the D-gear driving state and the gear locking key is triggered, a gear locking instruction is sent to a vehicle control unit VCU; the VCU is set to respond to the gear locking instruction, stop the automatic gear shifting logic and lock the current gear of the gearbox; the existing hardware state of the vehicle is utilized, the gear locking function can be achieved by updating the VCU program, and the implementation cost is low; and a safety protection mechanism (forced upshift and forced downshift) is arranged, so that the safety is high, the operation is convenient, and the operability is high.

A driving support ECU for executing constant speed control for controlling a vehicle speed so as to become a set vehicle speed, when the vehicle speed exceeds the set vehicle speed, calculates a target deceleration force for setting the vehicle speed, and controls a deceleration force so that a sum of a power train deceleration force and a service brake deceleration force becomes a target deceleration force. The vehicle driving support device is configured to control a deceleration force so as to be a target deceleration force. The driving support ECU determines an allowance degree of a driver with respect to an increase in an engine rotational speed due to a downshift when a vehicle travels downhill, and controls a ratio according to an allowance degree so that a ratio of a power train deceleration force to a target deceleration force becomes higher as an allowance degree is higher.

To improve operability of a shift lever, while preventing the lever from being erroneously operated in shift down.SOLUTION: A shift control device comprises an operating part that receives shift operation, a base on which the operation part is provided, and an operation restricting part that restricts shift operation. Shift transmission stages include a first shift transmission stage, a second shift transmission stage and a third shift transmission stage. The base is provided with a first region, a second region and a third region set corresponding to the first shift transmission stage, the second shift transmission stage and the third shift transmission stage respectively. The shift transmission stages are switched depending on which of the regions in which the operation part is operated. The operation restricting part does not restrict the operation part from operating in the second region and the third region when the operating part is in the first region, does not restrict the operating part from operating in the first region and the third region when the operating part is in the second region, and does not restrict the operating part from operating in the second region but restricts the operating part from operating in the first region, when the operating part is in the third region.SELECTED DRAWING: Figure 4

A method for operating the drivetrain of a motor vehicle, wherein the drivetrain comprises an internal combustion engine (1), an electric machine (4), and a range gearbox (2) with a main gearbox (9) and a range group (11), wherein the internal combustion engine (1) is coupled to an input shaft (6) of the range gearbox (2) via a switchable disconnect clutch (5), and wherein the electric machine (4) is also coupled to the input shaft (6). When the motor vehicle is in motion with the disconnect clutch (5) engaged, and a downshift is to be performed, at least involving the range group (1) and the main gearbox (9), and the electric machine (4) cannot be used for shift element synchronization, the following is carried out: The motor vehicle is decelerated such that the speed of the internal combustion engine (1) is reduced to a target speed.Subsequently, a load reduction is performed on a shift element of the main transmission (9) designed to execute the downshift, and the shift element is engaged. Following this, the input shaft (6) is synchronized to a first target speed, and the shift element of the main transmission (9) to execute the downshift is engaged. Simultaneously or subsequently, the range group (11) is shifted into neutral, the input shaft (6) is synchronized to a second target speed, and a shift element of the range group (11) to execute the downshift is engaged.

An automatic transmission (12 fig. 2) of a vehicle (1), comprising: operating 910 in a second mode, wherein the automatic transmission is controlled according to a second shift map (500, 700 figs. 7,

A method of controlling a hybrid vehicle (10, 126) having an internal combustion engine (14) configured to automatically stop in response to an internal combustion engine stop request and to automatically start in response to an internal combustion engine start request, the method comprising: Inhibiting an engine stop request based on the expected duration of an expected driver-commanded reduced power condition to reduce the occurrence of consecutive automatic stops and automatic starts; and Delaying a downshift or upshift of a vehicle transmission (16) in response to the expected duration of the expected driver-commanded reduced power condition.

A control device for a hybrid vehicle, the hybrid vehicle (10; 210) comprising an engine (12) with a supercharger (SC) serving as a travel drive power source, a rotary machine (MG2; MG) serving as another travel drive power source, an energy storage device (54) configured to transmit and receive electric power to and from the rotary machine (MG2; MG), and a transmission (60; 262) provided in a power transmission path between the engine (12) and drive wheels (16) and between the rotary machine (MG2; MG) and the drive wheels (16), the control device (100; 200) comprising: a prediction unit (104) configured to predict whether a necessary discharge power (Wnd) from the energy storage device (54) required to perform a downshift in the transmission (60; 262) exceeds an upper limit of the discharge power (Wout) of the energy storage device (54) when the downshift in the transmission (60; 262) is performed in a hybrid vehicle driving mode; and a control unit (106) configured to control a compressor speed (Ncmp) such that an increase rate (ΔNcmp) of the compressor speed (Ncmp) of the supercharger (SC) at the time of downshifting in the transmission (60; 262) increases as the upper limit of the discharge power (Wout) decreases when the necessary discharge power (Wnd) is predicted to exceed the upper limit of the electrical discharge power (Wout).

The present application provides a method and device for controlling acceleration by pressing the accelerator during a vehicle downshift. During the accelerator acceleration process during the downshift, the offgoing clutch is controlled to increase from a first initial torque to a first target torque, and the torque of the oncoming clutch is controlled to decrease from a second initial torque to a second target torque. When it is detected that the current torque of the offgoing clutch is the first target torque, a parabolic torque command is sent to the offgoing clutch so that the offgoing clutch controls its own torque to increase in the form of a parabola to the torque indicated by the parabolic command based on the parabolic torque command. When it is detected that the current torque of the offgoing clutch is the torque indicated by the parabolic command, the torque of the offgoing clutch is controlled to increase linearly to a third target torque. The present application can ensure power response and avoid jerking and noise during the accelerator acceleration process during vehicle downshift.