103results about How to "Improve ride comfort" patented technology

The invention discloses a control device and method for starting of an AMT vehicle on a ramp, which comprises a signal collecting unit, an electronic control unit and an actuating mechanism. The electronic control unit comprises a signal receiving module, a signal analysis and judgment module and a control signal output module, and the actuating mechanism comprises a clutch motor and a throttle motor. The signal collecting unit at least comprises a brake sensor of first level and a brake sensor of second level, the signal analysis and judgment module determines the engaging extent of a clutch and the opening extent of an air control shutter according to the signals collected by the brake sensors of first and second level and received by the signal receiving module, and the control signal output module respectively controls the actions of the clutch motor and the throttle motor according to the engaging extent of the clutch and the opening extent of the air control shutter. The control method for starting of the AMT vehicle on the ramp provided by the invention enables the engaging extent of the clutch and the opening extent of the air control shutter not to be zero when a brake pedal is released, thereby overcoming the starting spark extinction and back sliding of the vehicle caused by factors like friction force, engine torque, etc. during staring of the vehicle on the ramp.

The invention discloses a system and method for controlling the interconnecting state of a transversely interconnected air suspension with the orientation to stability of vehicle body postures. All unsprung mass acceleration sensors transmit acceleration information to a signal pre-processing system, the output of the information pre-processing system is connected with input of an ECU 5, the output of a CAN bus communication system is connected with the input of the information pre-processing system and the input of the ECU 5, the interconnection state control algorithm is integrated in the ECU, the output of the ECU is connected with an interconnection state control driving module, the output of the interconnection state control driving module is connected with an interconnection solenoid valve through a control line, and the output of a steering wheel angle sensor is connected with the input of the ECU through a signal transmission line. The running smoothness of a vehicle on a poor road face is improved by reasonably controlling the interconnection state of the transversely interconnected air suspension, the control stability of the vehicle during high-speed steering is not influenced, and it is possible for the interconnected air suspension to be applied to a small-sized vehicle.

The invention discloses a device and a method for judging AMT vehicle clutch half joint. The device comprises a signal collecting unit and an electronic control unit, wherein the signal collecting unit comprises an engine speed sensor, a speed change gear shaft speed sensor and a clutch position sensor which are respectively connected with an electronic control unit. The control unit is used for collecting a clutch position signal sent by the clutch position sensor when the engine speed is less than a first preset value after an AMT vehicle enters P shift and the absolute value of the speed change gear shaft speed difference is less than a second preset value. The invention can improve the accuracy of collected clutch half joint, thereby improving the running smoothness of the vehicle, reducing clutch wear, prolonging clutch service life, ensuring steady running of the engine and reducing engine speed fluctuation.

The invention provides a dynamic coordination hybrid electric vehicle energy management method based on working condition classification, and the method comprises the steps: employing an improved PSOalgorithm to optimize a K-means clustering analysis algorithm K-means to carry out the division of driving working conditions, and carrying out the adjustment of the dynamic oil consumption of a hybrid electric vehicle for sudden change working conditions. In the aspect of driving condition division, optimizing a clustering center of a K-means algorithm by the improved PSO algorithm, and then performing the condition division according to extracted characteristic parameters of typical conditions; and when a sudden change working condition occurs, entering a throttle valve dynamic coordinationprogram to perform reasonable torque distribution. An intelligent algorithm and a PID control technology are fused to solve the problems of fuel consumption increase, poor riding comfort and the likecaused by improper torque distribution and sudden accelerator change during sudden acceleration or deceleration at present; the power flow between the engine and the motor is reasonably controlled inreal time, the fuel economy is improved, pollutant emission is reduced, and the riding comfort is improved while the dynamic property is guaranteed.

The invention discloses a buffer block structure for a vibration reducer assembly. The buffer block structure comprises a top, a base, and a negative poisson ratio component arranged between the top and the base, wherein the negative poisson ratio component comprises multiple layers of negative poisson ratio modules; the negative poisson ratio modules comprise support layers and connecting layers connected with the support layers; the support layers and the connecting layers of the adjacent negative poisson ratio modules are connected; the negative poisson ratio modules comprise multiple negative poisson ratio units; and the negative poisson ratio units are hollow structures formed by the connecting layers enclosing the support layers. The invention further discloses a vibration reducer assembly. The vibration reducer assembly and the buffer block structure thereof are reasonable in structural design, can obtain anticipated nonlinear rigidity values, improve the vehicle driving smoothness, and further improve the capacity of the buffer block resisting the impact load.

The invention discloses a parallel hybrid power aircraft dynamic coupling system and a driving control method thereof. The system comprises a power source and a dynamic coupling system; the power source comprises an internal combustion engine, a motor and an energy storage device; the power coupling system is a parallel hybrid power coupling device formed by combining and connecting a planetary gear row, a brake and a clutch; the clutch is arranged between a sun gear and a planetary frame, the brake is arranged between the planetary frame and a power system shell, the internal combustion engine is connected with the sun gear, and the motor is connected with a gear ring and a system output shaft. By means of the system, various working modes that the motor starts the internal combustion engine, the motor or the internal combustion engine independently outputs power, the motor and the internal combustion engine output power at the same time, the internal combustion engine outputs power,the motor generates electricity, the internal combustion engine is turned off and the motor generates electricity can be achieved. The system is simpler in structure, has multiple working modes and can lower the power grade and working noise of the arranged internal combustion engine and reduce fuel consumption.

The invention discloses an automobile seat. The automobile seat comprises a furling drum for accommodating a cover film, a hanging structure and a tensioning mechanism, wherein the furling drum is arranged at the front end of a seat frame; the hanging structure is arranged on the top of a back frame; the tensioning mechanism is symmetrically arranged on two sides of the seat frame; a hook for hanging is arranged at the head end of the cover frame; the tensioning mechanism comprises a sliding chute formed on the two sides of the seat frame, a first support rod of which one end is slidingly connected in the sliding chute, a second support rod of which one end is pivoted on the two sides of the seat frame and a tensioning rod which is pivoted on the other end of the second support rod and extends into the cover film; the other end of the first support rod is hinged at the middle section of the second support rod, and a positioning slot is formed in the middle section of the sliding chute. When the cover film is required to be changed, the cover film is pulled out of the furling drum and is hung on the hanging structure of a back, and the cover film between the seat and the back is tensioned and compressed through the tensioning structure, so that a ventilation and vibration reduction space is formed between the seat and the back and problems of disassembly and assembly and exchange in the prior art are solved.

The invention discloses a combined type suspension system for a tracked vehicle. The vehicle comprises a vehicle body, twelve loading wheels and twelve balance elbows, wherein one end of each balance elbow is hinged with the vehicle body, and the other ends of the balance elbows are hinged with the loading wheels; structures on two sides of the vehicle body are symmetrical, and a first single-chamber hydro-pneumatic spring, a first double-chamber hydro-pneumatic spring, a second single-chamber hydro-pneumatic spring, a second double-chamber hydro-pneumatic spring, a third double-chamber hydro-pneumatic spring and a third single-chamber hydro-pneumatic spring are mounted between the balance elbows on two sides and the vehicle body from front to back sequentially. Compared with a single-type hydro-pneumatic suspension system, the combined type suspension system can improve the riding comfort of a tank on the off-road pavement by 30% or above on the premise of the vehicle speed of 20 m/s.

The invention discloses a vehicle speed guiding method, a server and a readable storage medium. The method comprises the steps: obtaining driving information of a controlled vehicle, and obtaining information of a road segment where the controlled vehicle is located and phase information of a signal lamp corresponding to the information of the road segment according to the driving information; judging whether a controlled vehicle enters a guide area or not according to the driving information, the road section information and the phase information; if the controlled vehicle enters the guidingarea, judging whether the passing state of the controlled vehicle is passing or not according to the phase information and the driving information; if the passing state is passing, obtaining an optimal target vehicle speed according to the driving information and the phase information; and sending the optimal target vehicle speed to the controlled vehicle, so that the controlled vehicle drives according to the optimal target vehicle speed. According to the vehicle speed guiding method provided by the invention, the passing rate of the vehicle at the traffic intersection is improved, and the occurrence rate of traffic violation and traffic accidents is reduced.

The invention relates to the technical field of automobile suspensions, in particular to a two-stage shock absorption automobile suspension structure. The two-stage shock absorption automobile suspension structure comprises a shock absorption body and a locking control mechanism. The shock absorption body is composed of a first-stage shock absorption structure and a second-stage shock absorption structure which are connected in series. The first-stage shock absorption structure comprises a first-stage damper, a first-stage inerter and a first-stage spring. The first-stage damper is connected with the first-stage inerter in series. The first-stage damper and the first-stage inerter which are connected in series are connected with the first-stage spring in parallel. The second-stage shock absorption structure comprises a second-stage damper, a second-stage inerter and a second-stage spring. The second-stage damper, the second-stage inerter and the second-stage spring are connected in parallel to form a second-stage spring, damper and inerter parallel connection integrated device. The locking control mechanism comprises an inerter braking locking piece which can be driven to lock thefirst-stage inerter, the rigidity of a suspension system is increased, and traveling safety and control stability are improved.

The invention discloses a collaborative control method of an electric vehicle chassis system and relates to the field of vehicle control. The collaborative control method is characterized in that a brake trigger signal, a wheel speed signal, a vehicle body vertical acceleration signal, a longitudinal acceleration signal, a lateral acceleration signal, a pitching angle signal, a heeling angle signal, a heading angle speed signal, a steering shaft input torque signal and a vehicle speed signal which are measured by sensors are transmitted to a collaborative controller, the collaborative controller monitors the running state of a vehicle and gives out control commands to an electro-hydraulic combined brake upper controller and an EPS (electric power steering)+ASS (active suspension system) centralized controller, the electro-hydraulic combined brake upper controller and the EPS+ASS centralized controller operate according to respective received sensor signals and collaborative controller commands, the electro-hydraulic combined brake upper controller controls in-wheel motors and hydraulic brake units by coordinating a motor controller and an ABS (anti-lock braking system) controller, and the EPS+ASS centralized controller directly controls power-assisting motors and actuators. The collaborative control method of the electric vehicle chassis system has the advantages that the conflict under a subsystem coupling condition is reduced and the overall performance of the electric vehicle chassis system is improved.

The invention relates to vehicle suspensions, in particular to an energy storage suspension. A left suspension and a right suspension of the energy storage suspension are connected through a cross bar, and an inerter is used in the energy storage suspension. According to the energy storage suspension with the left suspension and the right suspension being communicated, the upper end of a left wheel vibration isolator and the lower end of a left vehicle body vibration isolator are coaxially hinged to the left end of the cross bar, the upper end of the right wheel vibration isolator and the lower end of the right vehicle body vibration isolator are coaxially hinged to the right end of the cross bar, and the cross bar is hinged to the middle portion of a suspension beam and is capable of rotating around a middle hinge shaft. By means of the beam which is connected with the left suspension and the right suspension, all the static loads of the vehicle body act on the left wheel vibration isolator and the right wheel vibration isolator, and thus the technical defect that the inerter is easy to puncture under the action of the vehicle body loads is overcome. By means of the vehicle body vibration isolators, the lower frequency peak of the vehicle body vertical acceleration is restrained. By means of the wheel vibration isolators, the high frequency peak of tyre dynamic loads is restrained. By means of the cross bar which are connected with the left suspension and the right suspension, the stress interaction of the left suspension and the right suspension is reduced, lateral incline of the vehicle body is reduced, therefore, the steering stability ofe the vehicle is improved, and the purposes that people sit in the vehicle comfortably and a driver drives safely are achieved.

The invention provides a valve control type semi-active oscillating damper. The valve control type semi-active oscillating damper comprises an oil cylinder component and an extra-cylinder component which is positioned on the outer side of the oil cylinder component, wherein the oil cylinder component comprises a guide bearing, an oil cylinder and a bottom valve seat which are fixedly connected with one another in turn; an oil storage tank is arranged outside the oil cylinder, and a piston and a piston rod are arranged in the oil cylinder; the extra-cylinder component comprises a first switching valve, a second switching valve, a two-position three-way valve, a proportional overflow valve, a throttling valve, a throttling overflow valve, a body acceleration sensor and a controller; the body acceleration sensor is used for detecting the acceleration of a body, outputting a signal and transmitting the signal to the controller; and the controller is used for controlling the energization and de-energization states of the first switching valve, the second switching valve and the two-position three-way valve, and controlling the current intensity of the proportional overflow valve at the same time. The valve control type semi-active oscillating damper is simple in structure, can make real-time responses and provide a continuously adjustable damping force according to the state of a train during operation, and can be simply and reliably controlled.

The invention relates to a self-adapting car seat. The self-adapting car seat is characterized in that airbags are arranged below skins of a seat cushion, a backrest and a side wing; airbag outer pressure sensors are located between the airbags and the surface skins of the seat; airbag inner pressure sensors are mounted inside the airbags; and each airbag is provided with two electromagnetic valves, wherein one of the electromagnetic valves communicates with atmosphere and serves as an air outlet valve of the airbag and the air pressure in the airbag is reduced when the electromagnetic valve is opened, the other electromagnetic valve is connected with an air cylinder and services as an air inlet valve of the airbag and the air pressure in the airbag is increased when the other electromagnetic valve is opened. According to the self-adapting car seat, the pressure states of various positions such as the seat cushion, the backrest and the side wing of the seat can be detected in real time, and complete fit of the seat and a human body is guaranteed by adjusting the pressure values of the airbags on the seat, so that the pressure of the human body to the seat is distributed uniformly.

The invention discloses a honeycomb-distribution-type intelligent safety wheel with adjustable rigidity damping. The wheel is mainly composed of a honeycomb-type mesh-shaped inner tire, an outer tirewith a wire, magnetorheological fluid, a hub, a self-adaption controller and a monitoring unit. The honeycomb-type mesh-shaped inner tire is adopted for replacing an inner inflation tire of a traditional wheel and filled with the magnetorheological fluid, the outer wire wraps the hub, the power-on wire is embedded in the outer tire of the wheel, and the self-adaption controller senses the externalenvironment and the vehicle body state in real time through the monitoring unit and controls the current magnitude for generating magnetic fields different in intensity; under interference of the external magnetic field, the physical characteristics of the magnetorheological fluid filling the inner tire are changed, so that the rigidity damping of the whole wheel is changed, the rigidity dampingof the wheel is automatically adjusted under different driving working conditions, the smoothness of vehicle driving is improved, through the honeycomb-type mesh-shaped inner tire structure, the driving safety is effectively considered, and the danger of the flat tire accident is reduced.

An automobile seat comprises a first seat and two second seats which are independently arranged on the two sides of the first seat. Each second seat comprises a seat skeleton, a back skeleton, folders, a lateral sliding mechanism and a turnover articulated mechanism, wherein the folders are connected between the seat skeletons and the back skeletons, and the back skeletons can be folded forwards relative to the seat skeletons through the folders in a turnover mode. Each lateral sliding mechanism comprises a first sliding part and a second sliding part which can slide toward the outer side of the first seat relative to the first sliding part. The second seats can slide relative to the first seats through the lateral sliding mechanisms. Each turnover articulated mechanism comprises a first articulated arm and a second articulated arm, wherein the first articulated arm is fixedly connected with one second sliding part, the second articulated arm is fixedly connected with one seat skeleton, and the first articulated arm and the second articulated arm are hinged. The second seats can be folded to be in a vertical state relative to the first seat through the turnover articulated mechanisms in a turnover mode. The automobile seat can achieve the effect that one seat can meet personalization requirements of different crowds.

The invention discloses a novel passive suspension comprising an inertial container. The novel passive suspension is characterized by comprising a supporting spring (1), an auxiliary damper (2), the inertial container (3), a main damper (4) and an auxiliary spring (5); the auxiliary damper (2) and the inertial container (3) are connected in series to form a low-frequency vibration filtering device; the auxiliary spring (5) and the main damper (4) are connected in parallel to form a high-frequency vibration filtering device; the low-frequency vibration filtering device and the high-frequency vibration filtering device are connected in series to form a full-frequency vibration filtering device; the full-frequency vibration filtering device is connected with the supporting spring (1) in parallel; the upper end of the parallel structure is hinged to a vehicle body, and the lower end of the parallel structure is hinged to wheels. The novel passive suspension can buffer and attenuate impact of a concave-convex road surface at a high-frequency band and a low-frequency band so that a vehicle can adapt to the road surface with full-frequency vibration, the riding comfort of the vehicle can be effectively improved, and the influence of unevenness of the road surface on the vehicle body can be reduced.

The invention relates to a method, device and equipment for vehicle shifting. According to the method for vehicle shifting, when a shifting request is received, a rotating speed difference value of agearbox output shaft and a rotating speed change rate of the gearbox output shaft are acquired; estimated time is determined according to the rotating speed difference value and the rotating speed change rate; whether the estimated time is greater than preset lag time is judged; if the estimated time is not greater than the lag time, gear shifting is carried out according to the gear shifting request; if the estimated time is greater than the lag time, a current vehicle speed is acquired; whether the current vehicle speed is smaller than a preset vehicle speed of a gear shifting point is judged; if the current vehicle speed is smaller than the vehicle speed of the gear shifting point, a current gear is maintained; if the vehicle speed is not less than the vehicle speed of the gear shiftingpoint, a vehicle wheel end torque is acquired; and whether to perform gear shifting according to the gear shifting request is judged based on the wheel end torque. According to the method, device andequipment, the lag time is taken as a judgment condition and the wheel end torque is taken as an upshift limit requirement, so that the gear shifting process is completed in advance, and the gear shifting smoothness is improved.

The invention relates to a power-failure-free AMT electric driving structure. The power-failure-free AMT electric driving structure comprises a driving motor (1), a mechanical automatic transmission (2) and a power motor (3). The driving motor (1) is connected with the input end of the mechanical automatic transmission (2), the power motor (3) is connected with the output end of the mechanical automatic transmission (2), and the driving motor (1), the mechanical automatic transmission (2) and the power motor (3) are coaxially arranged in a series-connection mode and form a double-motor coaxial coupling structure. Compared with the prior art, the power-failure-free AMT electric driving structure has the advantages that power failure of an AMT in the gear shifting process can be well eliminated, the driving smoothness and the taking comfort of a vehicle are improved accordingly, torsional vibration damage caused when the torque on a transmission shaft returns to zero and is reloaded is further eliminated, and the service life of an AMT system is greatly prolonged.

The invention relates to the technical field of vehicle suspensions, and discloses an active suspension control method. In the running process of the vehicle, a front road is observed to obtain an unevenness curve of the road, and the posture of the vehicle which needs to be kept is estimated when the vehicle runs to the road surface and has smoothness, so as to obtain an expected value of the posture of the vehicle body; the active suspension controller calculates compensation information according to the road surface unevenness curved surface and obtains a suspension attitude instruction through calculation in combination with the current vehicle attitude state; when the vehicle runs to the uneven road surface, the active suspension controller sends a suspension attitude instruction to the chassis controller; the chassis controller controls the actuating mechanisms of the suspensions to independently adjust the corresponding suspensions, so that the vehicle can adapt to the fluctuation change of the road surface, the good smoothness of the whole vehicle is kept, and the riding comfort of the vehicle is improved. Meanwhile, the invention further discloses an active suspension control system.

The invention relates to the technical field of vehicle seats, and discloses a bus seat with a buffering function. The bus seat comprises a mounting shell of which the upper end is provided with an opening; two sliding rods are fixedly connected to the inner walls of the left and right opposite sides of the mounting shell in a front-back symmetry mode. Two sliding sleeves sleeve the rod walls of the two sliding rods in a sliding manner; the upper ends of the four sliding sleeves are fixedly connected with the same supporting plate; connecting blocks are fixedly connected to the four corners ofthe upper end of the supporting plate through damping mechanisms, a seat body is fixedly connected to the upper ends of the connecting blocks, a sponge cushion is fixedly connected to the upper sideof the seat body, and a waist support and a neck support are installed on the backrest portion of the seat body. The bus seat with the buffering function has the advantages that the seat body has excellent buffering performance, the seat body can be more suitable for emergency braking and other conditions of the bus, the riding comfort of people is higher, and the safety is better.

The invention discloses a hydraulic automatic gearbox gear-shifting control method and system. The method includes the steps of detecting a gear-shifting signal of an automatic gearbox; when the gear-shifting signal is detected, comparing a current gear-shifting working condition with different preset gear-shifting working conditions to obtain the certain preset gear-shifting working condition matched with the current gear-shifting working condition; executing a clutch control mode corresponding to the certain preset gear-shifting working condition. By means of the hydraulic automatic gearbox gear-shifting control method and system, the clutch control mode can be adjusted in time to adapt to the current gear-shifting working condition, so that gear-shifting impact can be reduced, and the gear-shifting smoothness can be improved.

The invention discloses a method for adjusting an automobile seat headrest with a protection function. The method comprises the following steps: firstly, a control module electrically connected with a cylinder is directly communicated with an automobile active safety system; when a distance of a vehicle behind to the present automobile is within a dangerous value range, the control module directly transmits a command to the cylinder so that an adjusting rod drives a head plate to move forwards, leading to that a supporting portion of the headrest gets close to the head of a passenger; in the movement process of the head plate, a fixed block is mounted on the adjusting rod and a connecting rod A, a connecting rod B and a connecting rod C are arranged on the fixed block, a bottom surface of the head plate and an inner sidewall of the frame, whereby the movement of the head plate is supported by the inner walls of the two sides of the frame and the fixed block simultaneously; when a distance of the vehicle behind to the present automobile is within a safe value range, the control module directly controls the cylinder to retract and the head plate directly falls into a rectangular groove so that the head of the passenger and the supporting portion of the head rest return, and therefore, synchronization of headrest protection and the automobile safety system is realized.

The invention discloses a novel artificial intelligence air suspension and belongs to the field of automobile air suspensions. The novel artificial intelligence air suspension comprises air shock absorbers, a stabilizer bar, an ECU carrying an artificial intelligence chip, a control circuit, inflation pipes, air storage tanks and a driving environment sensing unit. The driving environment sensingunit comprises part of or all components of a speed sensor, an acceleration sensor, a height sensor, a pressure sensor, a vehicle-mounted camera, a laser radar sensor, an ultrasonic sensor, an infrared sensor and an angle sensor. The air shock absorbers are connected with the air storage tanks through the inflation pipes; the two ends of the stabilizer bar are connected with the transversely-arranged air shock absorbers; and the driving environment sensing unit is connected with the ECU carrying the artificial intelligence chip through the control circuit and controls the air shock absorbers,and artificial intelligence of the automobile air suspension is achieved.

The invention provides a method for adjusting the height of a vehicle body through a height sensor. The method comprises the steps of measuring vehicle body height signals of a vehicle in real time through the height sensor arranged on the vehicle, collecting two paths of rear axle height sensor signals, judging whether a vehicle door is opened according to the rear axle height sensor signals, analyzing the rear axle height sensor signals to obtain the current height value of the vehicle body and judging whether the current height value of the vehicle body is higher than first preset value if the vehicle door is not opened, judging whether the current height value of the vehicle body is higher than second preset value if the current height value of the vehicle body is not higher than the first preset value, and turning off a solenoid valve to complete vehicle body height adjustment if the height value of the current vehicle body is not lower than the second preset value. The method for adjusting the height of the vehicle body through the height sensor can ensure that the vehicle body height is located in a best position and improve the smoothness of the vehicle.

The invention discloses a control method, device and system for a rail vehicle air conditioning system, wherein the control method for the rail vehicle air conditioning system comprises the following steps of obtaining PMV parameters of a rail vehicle in different PMV index areas and establishing a PMV evaluation formula; obtaining a temperature control curve by fitting according to the PMV evaluation formula; and controlling the air conditioning system to adjust the temperature according to the temperature control curve. According to the control method, device and system for the rail vehicle air conditioning system, the influences of the PMV parameters on body comfort levels of passengers in the process of controlling the rail vehicle air conditioning system are considered in a comprehensive manner so that the taking comfort levels of the passengers during taking the rail vehicle are improved.

The invention discloses an oil-pneumatic suspension system capable of realizing quasi-zero stiffness at an equilibrium position. The suspension system consists of three oil cylinders, an accumulator and three solenoid valves. One end of the three oil cylinders is hinged with the axle, the other end is hinged with the vehicle frame, and the two horizontal oil cylinders are symmetrically arranged relative to the vertical oil cylinders. The accumulator is respectively connected with the large chambers of the three oil cylinders through electromagnetic valves and pipelines, and the small chambers of the three oil cylinders can communicate with the atmosphere or directly communicate with the large chambers. The suspension system realizes oil filling, oil draining, and rigidity-elasticity conversion functions through three solenoid valves, and combines the installation position of the oil cylinder to achieve quasi-zero stiffness characteristics near the equilibrium position by reasonably matching the size parameters of the large and small chambers of the vertical oil cylinder . This system is a passive oil-air suspension system with low cost and high safety factor.

The invention discloses an oil pressure braking system for a rail transit vehicle. The system includes an axle, a gear box and a hydraulic pump; the axle penetrates through the gear box to serve as power input of the gear box; an output shaft of the gear box is connected with a main shaft of the hydraulic pump through a clutch device, an input oil pipe of the hydraulic pump is connected with an oil storage box, an output oil pipe of the hydraulic pump is connected with the input end of a high-pressure oil tank, the output end of the high-pressure oil tank is connected with the oil storage boxthrough a pressure relief oil pipe, and an electric control switch is connected to the pressure relief oil pipe in series. High-speed braking is achieved through oil pressure braking, real-time monitoring and adjusting can be conducted, it is guaranteed that a vehicle conducts braking according to the needed braking deceleration, braking force and braking deceleration are stable and reliable, riding comfort is high, and the system can adapt to both high-speed braking and low-speed braking.

The invention aims to provide a hybrid power vehicle driving system capable of realizing single-motor two-gear driving. The hybrid power vehicle driving system comprises an engine, a planetary gear mechanism, a synchronizer and a first motor; the planetary gear mechanism comprises a sun wheel fixedly connected with a transmission shaft of the engine, an outer gear ring connected with a brake, a planet carrier connected with the outer gear ring through a clutch and a planetary gear; the synchronizer is fixedly connected onto an intermediate shaft; the two sides of the synchronizer are meshed with a first gear and a second gear separately; the first gear and the second gear are sleeved on the intermediate shaft in a separated manner; the outer gear ring and the planet carrier are coaxially and fixedly connected with a third gear and a fourth gear separately; the third gear and the fourth gear are meshed with the second gear and the first gear separately; a fifth gear and a sixth gear arefixedly connected with the intermediate shaft and the transmission shaft of the first motor separately and are meshed with a differential mechanism gear and the first gear fixedly connected onto a differential mechanism. Under the pure electric drive mode, the hybrid power vehicle driving system can form two speed ratios, more structures are not needed, and the hybrid power vehicle driving systemhas the ECVT function.

The invention provides a vehicle following distance control method and device. By using a tracking coordinate system established based on a variable structure sliding mode control theory, a target area where the relative speed value and the relative distance value between a front vehicle and a current vehicle are located can be determined, then the optimal acceleration value is obtained by processing and calculating the acceleration value of the current vehicle according to the type of the target area, and thus a lower-layer controller controls a power system and/or a braking system to complete torque output according to the optimal acceleration value. By designing a system constant-speed area and a system buffer area, the problem that the braking deceleration is not smooth and continuousenough when a front vehicle is cut in and cut out at a short distance is solved, and the riding comfort is improved.