30 results about "Downhill running" patented technology

The invention relates to a whole railway traction locomotive tester, which belongs to the field of test and control on electric traction locomotive systems. The invention solves the traction and braking problems of the prior whole locomotive tester, and realistically simulates load characteristics in the process of the traction/braking of a locomotive. The tester consists of N sets of single-shaft assemblies, each set of single-shaft assembly comprises railway wheels, universal couplings, synchromesh transmissions, torque sensors and flywheels, wherein N is equal to 4, 6 or 8; and in each set of single-shaft assembly, compensated motors can be connected between the torque sensors and the flywheels. The tester can realistically simulate the load characteristics of a train and carry out a test on traction characteristics, braking characteristics and the like, the flywheels can store electric energy in the process of the traction characteristic test, and can feed the electric energy back to a railway network via a braking mechanism in the braking characteristic test, and thereby energy is efficiently utilized. The characteristics of the train, such as resistance in the process of uphill running, downhill running and stable running, can be simulated by controlling the compensated motors, so that a test result can be more real and reliable.

The invention discloses a fuel generator controller and a control method on the basis of an oil-electric hybrid electric vehicle. The controller comprises a microprocessor, an electric door lock state detector, an analog/digital (A/D) converter, a direct current voltage detector, a direct current detector, a temperature detector, a generator starting-stopping driver, an electronic switch module and a throttling actuator. The electric door lock state detector is connected with the microprocessor, the direct current voltage detector, the direct current detector and the temperature detector are connected with the microprocessor through the A/D converter, and the generator starting-stopping driver is connected with the microprocessor and the electronic switch module. The microprocessor controls starting, stopping and generated energy of a fuel generator according to stress optical coefficient (SOC) value of a storage battery pack and uphill and downhill running condition of the electric vehicle. The controller can control the fuel generator to charge the storage battery pack appropriately and accurately according to the SOC value of the storage battery pack, prevents the storage battery pack from being overcharged or overdischarged, and prolongs service life of the storage battery pack.

A method of controlling an automatic transmission of a motor vehicle that is situated in the force flow between a drive motor and an axle drive of a drive axle or a transfer box in which the current road inclination (α_FB) is determined. To improve the shifting behavior of the transmission, during a transition between driving on a downhill stretch (2) and on level ground (4), after driving on the downhill stretch (2) and/or after the transition to a thrust operation, a recognition function for determining a downhill run-out (3) is initiated and, when the downhill run-out (3) is recognized, a shift to a higher gear during a thrust operation, i.e., a thrust upshift, is carried out before driving onto level ground (4) and/or before the transition to the traction operation.

The invention mainly provides an intelligent tracking tow truck which can bear a certain weight. The tow truck mainly involves a tow truck combined type power management system based on single-chip microcomputer control and a tow truck short-distance wireless two-way navigation system based on single-chip microcomputer control. The intelligent tracking tow truck combined type power management system is powered on by a storage battery, and the storage battery is charged through a solar cell panel or city power. The intelligent tracking tow truck short-distance wireless two-way navigation system achieves man-truck positioning through a wireless induction system, an ultrasonic induction system determines the distance between a person and the truck, and the wireless induction system and the ultrasonic induction system cooperate to achieve synchronous running of the tow truck and a controller. An inclination angle detection system is used for monitoring the pavement conditions in the running process of the tow truck in real time and matched with a direct-current speed reducing motor driving system to achieve automatic acceleration during uphill running and automatic braking during downhill running. The intelligent tracking tow truck is powered on by a hybrid power source of solar energy and the city power, the wireless technology and the ultrasonic technology are used for achieving intelligent control of the tow truck, and the tow truck has the advantages of saving energy, being environmentally friendly, intelligent and the like and is an ideal tool for short-distance low weight carrying.

The invention discloses a flywheel-motor magnetic coupling transmission hybrid power system. The system comprises a flywheel energy storage magnetic coupling transmission device, an electromagnetic clutch and a double-rotor motor; one end of an inner rotor shaft of the motor of the double-rotor motor is movably connected with the active part of the electromagnetic clutch through a bearing, and theother end of the inner rotor shaft of the motor is movably connected with a connecting body through a bearing; the permanent magnet inner rotor of the motor is connected with the inner rotor shaft ofthe motor; the motor stator is connected with the main box body; one end of the motor magnetic regulation outer rotor is movably connected with the motor main box body through a bearing, and the other end of the motor magnetic regulation outer rotor is fixedly connected with one end of the connecting body; the other end of the connecting body extends out of the cavity structure and is connected with an external load; a flywheel energy storage magnetic coupling transmission device, a magnetic coupling transmission mechanism and a double-rotor motor are cooperatively matched, so that normal uniform-speed running of an automobile, recovery of braking energy during braking and downhill running of the automobile and conversion of kinetic energy of a flywheel into kinetic energy during acceleration and uphill running of the automobile are achieved.

The invention discloses a roof step-adjustable air resistance retarder comprising a fixed support, at least one sub-retarder, a transmission mechanism, and a control system. The fixed support is mounted on a car roof. Each sub-retarder comprises a wind resisting blade, a locking mechanism and a rotating shaft, wherein the rotating shaft is rotatably supported on the fixed support, and the wind resisting blade is fixedly connected to the rotating shaft. The locking mechanism disposed between the rotating shafts and the fixed support is used for limiting rotation angles of the rotating shafts which rotate in relation to the fixed support. The transmission mechanism drives the rotating shafts to rotate. The control system controls the locking mechanism and the transmission mechanism to operate. The roof step-adjustable air resistance retarder has the advantages that windward area of a car can be adjusted, vehicular slow braking is achieved through air resistance, thermal load of a frictional brake during vehicle continuous braking and continuous downhill running can be distributed effectively, heat fading is prevented, vehicle driving safety is improved, and wear of the frictional brake is reduced.

A method of controlling an automatic transmission arranged in a vehicle between a drive motor and an axle drive of a drive axle or a transfer box such that the current road inclination is determined and, after driving onto a downhill stretch of road, to increase a braking action of the drive motor and/or a permanent brake, a shift to a lower gear is carried out and after a transition to a traction operation or after driving onto level ground, a shift to a higher gear is carried out. To improve transmission shifting behavior, when transitioning between a downhill stretch and level ground, it is provided that a function for detecting a downhill run-out is started and if a downhill run-out is detected, and a shift to a higher gear is carried out while still in a thrust operation before driving onto the level ground and/or before the transition to traction operation.

The invention relates to electronic control technologies for vehicles, in particular to a method and a device for improving the stability of vehicles when the vehicles run uphill and downhill. The method for improving the running stability of the vehicles in an embodiment of the invention includes steps of correcting apparent acceleration of the vehicles by the aid of kinetic parameters of the vehicles; determining whether the vehicles are in uphill running states and downhill running states or not according to corrected values of the apparent acceleration; improving the dynamic control intervention sensitivity of the vehicles if the vehicles are in the uphill running states or the downhill running states.

The invention discloses a method for determining the whole vehicle resistance of an off-road vehicle. The method comprises the steps that 1, the driving working condition of the off-road vehicle to beanalyzed is obtained; 2, effective resistance in rolling resistance, air resistance and slope resistance of the off-road vehicle to be analyzed is obtained based on the driving working condition; and3, the whole vehicle resistance under the driving working condition is determined according to the obtained effective resistance. According to the method, the resistance model of the whole vehicle under the conditions of a flat road and different slopes and the evaluation method are established, the resistance model of the whole vehicle can be accurately evaluated, and then the braking power requirement of the electric driving system of the vehicle under the maximum braking speed of a mine is evaluated according to the resistance of the whole vehicle under the downhill running working condition. The method can effectively solve the problem of inaccurate selection of the braking power of the electric driving system of the mining vehicle, so that the frequent use of mechanical braking of the whole vehicle can be avoided, and the burnout of the mechanical braking of the whole vehicle and even the safety risk of the whole vehicle are reduced.

The invention discloses a heavy-duty vehicle hybrid control system and control method. The heavy-duty vehicle hybrid control system comprises a wheel driving sub system, a hydraulic sub system and a pressure sub system. The heavy-duty vehicle hybrid control method comprises the steps of a parking brake energy recovery control mode, a vehicle downhill running process energy recovery control mode, avehicle downhill control strategy and a starting control mode. According to the heavy-duty vehicle hybrid control system and control method, brake energy can be mainly recovered by using characteristics of high power density and rapid response of the hydraulic sub system; by using characteristics of high energy density and slow dynamics of the pressure sub system, the vehicle downhill motion energy is mainly recovered, and compressed air generated by using the pressure sub system to recover the energy is used for being injected into an engine or used for auxiliary functions such as braking, and therefore, the fuel economy of the engine is enhanced, and vehicle energy waste is effectively avoided.

The invention discloses a driving system and method for a hybrid power four-wheel drive automobile. The system comprises a battery module, an engine module, a generator and a gearbox, wherein the engine module is connected with the gearbox through the generator; the gearbox drives front wheels of the automobile through a transmission shaft and a drive axle; the driving system for the hybrid power four-wheel drive automobile further comprises an electric motor and a differential; the battery module is electrically connected with the generator and the electric motor respectively; the electric motor is connected with the differential; and the differential drives rear wheels of the automobile. The system collects and converts power of the automobile during breaking and downhill running into electric energy for storage, and the stored electric energy enables the electric motor to work to drive the rear wheels when four-wheel drive is needed, so that energy is saved, and the economical efficiency of the whole automobile is improved. The driving system and method are applicable to the hybrid power four-wheel drive automobile.

The invention discloses a variator and an electric vehicle equipped with the variator. A housing (1) of the variator is provided with at least one brake caliper (2), and the brake caliper (2) brakes aplanetary gear carrier (9) directly or through a brake disc (5). The brake caliper (2) is controlled by a pedal or a handle through a brake cable or a hydraulic oil pipe, and when the electric vehicle needs to be braked in an auxiliary mode through motor power generation during downhill running, the brake caliper (2) is controlled by the pedal or the handle to brake the planetary gear carrier (9)so that the planetary gear carrier (9) cannot rotate, according to the characteristics of a planetary gear transmission, at the moment, an outer gear ring (8) transmits energy to a sun gear (6) through a planet gear (7), the sun gear (6) drives a motor rotor to rotate, and a motor is driven by a wheel hub to rotate at a high speed and generate power.

The invention discloses a hydraulic brake stator and a hydraulic brake. The hydraulic brake stator comprises a stator body and a plurality of stator blades arranged on the stator body, wherein an oilinlet hole and an oil drainage hole are formed in the stator; the oil inlet hole extends to the front surface of the stator from the back surface of the stator through the interiors of the stator blades; and the oil drainage hole is formed in the edge of the stator. The hydraulic brake stator and the hydraulic brake are capable of realizing rapid oil filling and oil drainage, high in braking response speed, and applicable to a high-speed vehicle; the brake is small, light in weight, and convenient to install; the brake is applicable to long-time continuous braking, and free from mechanical wear; the brake improves the safety of downhill running, and can realize a constant low speed during downhill; and the brake is low in noise, and high in continuous braking capacity.

The invention provides a downhill running control method and system for a train. The method comprises the following steps: designing a heavy-load train running control strategy and generating a target speed curve; when the train passes through a long and large downhill line, the abrasion of the train and the line is reduced, and the coupler is prevented from being snapped; when the target speed curve is tracked, the error between the actual tracking speed and the target speed is controlled within a reasonable range, and speed tracking control over the train is achieved. According to the method, firstly, the strictest target speed and position in front of train operation are determined by designing the description form of line data; secondly, according to the strictest target speed and position, the design of a long and large downhill reference speed curve is completed in combination with the line gradient, advanced speed reduction of a long and large downhill section train is achieved, and it is guaranteed that the ATO speed is within the safety range; and finally, according to the air charging time, the air discharging time and the downhill gradient value, the lower bound of the air braking applying and cancelling speed is adjusted, and the smoothness of air braking output is guaranteed.

The invention relates to a power take-off wheel. The power take-off wheel is characterized in that a wheel carrier comprises a hub (1), a group of power cylinders (1a) are uniformly distributed on the hub (1), one side of the hub (1) is connected with a rim (9), the other side of the hub (1) is connected with a rim cover plate (2), one side of the hub (1) is connected with a flange holder (3), two ends of the flange holder (3) are each provided with a flange plate (3a), the flange plate (3a) at one end of the flange holder (3) is connected with the hub (1), and the hub (1) is connected with a kinetic energy recovery device and a kinetic energy conversion output device. After the technical scheme is adopted, surplus kinetic energy generated during downhill running of an automobile is effectively utilized, so that the energy utilization ratio is improved, and meanwhile, abrasion of an automobile braking system is reduced.