327 results about "Retarder" patented technology

The invention relates to a fault detection method and system suitable for a vehicle body provided with a retarder, and relates to the technical field of vehicle body fault detection. The method comprises the following steps: acquiring and detecting a vehicle body state signal of a vehicle body; vehicle body dynamic signals of a vehicle body are obtained and detected; and accessing a buffer and enabling the retarder to enter a test mode to test the function of the retarder. The fault detection system is composed of a controller, a speed signal detection unit, a signal amplifier and a power supply unit which are connected with one another to work cooperatively. According to the method, the effects of comprehensively detecting the fault of the vehicle body provided with the retarder, effectively positioning the fault position and evaluating the fault condition are achieved.

The invention discloses a heavy truck hydraulic retarder control method and system and a vehicle, and belongs to the technical field of retarder control. The method comprises the steps that the target braking torque value of a retarder is read; if the target braking torque value is larger than or equal to the maximum output torque value, the target braking torque value is set to be the maximum output torque value; if yes, the target braking torque value is dynamically compensated; calculating a target working pressure value of the retarder cavity; and the deviation between the target working pressure value of the retarder containing cavity and the current working pressure and the deviation between the proportional valve target and the actual current are calculated, calculation is conducted through a PID controller, and the output serves as the input of the retarder proportional valve so as to control the output torque of the retarder. According to the invention, the output torque delay can be reduced so as to improve the braking performance of the retarder, the braking precision and stability are relatively high, and relatively stable braking can be maintained under the conditions of different vehicle speeds and different oil temperatures.

The invention provides a hydraulic retarder system and method and a vehicle with the hydraulic retarder system. The hydrodynamic retarder system comprises a hydrodynamic retarder, a hydraulic control system and a control system, wherein the hydrodynamic retarder is provided with a retarder working cavity; a third oil inlet of the oil guide device is communicated with a second oil outlet of the retarder working cavity, and a third oil outlet of the oil guide device is communicated with a second oil inlet of the retarder working cavity; a fourth oil inlet of the heat energy conversion device is communicated with a fifth oil outlet of the oil liquid guide device, a fourth oil outlet of the heat energy conversion device is communicated with a fifth oil inlet of the oil liquid guide device, and the heat energy conversion device is electrically connected with external equipment. And the heat energy conversion device is used for converting heat energy generated by the hot oil into electric energy for external equipment to use. The energy utilization efficiency of the system is improved, remarkable economic and environmental benefits are brought, and the problem that in the prior art, the braking torque gear of the hydraulic retarder is difficult to meet the requirements under different working conditions is solved.

The invention relates to the field of vehicle control, in particular to a vehicle downhill constant-speed control method and system based on a hydraulic retarder and a storage medium. According to the ramp information and the state information of the vehicle, fitting wind resistance and road resistance coefficients of the vehicle based on a least square method; according to the wind resistance and road resistance coefficient and ramp information of the vehicle, first target brake pressure of a hydraulic retarder controller and second target brake pressure of a hydraulic retarder are calculated; calculating a proportional valve control input value, wherein the hydraulic retarder controls the vehicle speed based on the proportional valve control input value; the first target brake pressure and the second target brake pressure of the hydrodynamic retarder are calculated by fitting the wind resistance coefficient of the vehicle and the road resistance coefficient, the pressure of the working cavity is adjusted through the input value of the pressure closed-loop control proportional valve, and the precision and stability of vehicle downhill constant-speed control are remarkably improved; and it is ensured that the vehicle can still rapidly and stably maintain the target vehicle speed when the gradient changes, and the driving safety and comfort are greatly optimized.

The utility model discloses an integrated bidirectional hydraulic pump station for a car arrester in a tank, which comprises a valve block, a bidirectional hydraulic pump, a motor, an oil tank, a car arrester driving oil cylinder, overflow valves and one-way valves, a left oil way and a right oil way are arranged in the valve block, the left oil way is provided with a first overflow valve, a first one-way valve and a fifth one-way valve, and the fifth one-way valve is a hydraulic control one-way valve. A second overflow valve and a second one-way valve are installed on the right oil way, and the second one-way valve is a hydraulic control one-way valve and is controlled by the oil pressure of the left oil way; an oil port A1 of the two-way hydraulic pump is connected with a piston cavity oil port of the car arrester driving oil cylinder through a left oil way, and an oil port B1 of the two-way hydraulic pump is connected with a piston rod cavity oil port of the car arrester driving oil cylinder through a right oil way. The left oil way is connected with the oil tank through a fifth one-way valve, and the fifth one-way valve is used for releasing additional backpressure generated in a piston cavity in the process that the two-way hydraulic pump drives a piston rod of the car arrester driving oil cylinder to retract. According to the utility model, the power consumption is reduced, the energy is saved, and the reliability of the system is improved.

The invention belongs to the technical field of new energy automobile transmission gear shifting control, and discloses an AMT gear shifting control method in an electric truck combined braking constant-speed downhill process, which comprises the following steps: judging whether a vehicle enters a combined constant-speed control state or not, and if the vehicle enters the combined constant-speed control state, selecting an AMT gear shifting rule based on a preset AMT gear shifting rule; the AMT optimal gear is obtained according to the current vehicle speed and the required regenerative braking torque, the limitation that only the motor efficiency is considered in a traditional method is broken through, the transmission system and the battery charging and discharging efficiency are synchronously covered, meanwhile, a braking torque cooperative change mechanism is creatively adopted, and the optimal gear is obtained. In the gear shifting process, braking force distribution of the motor and the hydraulic retarder is coordinated according to the preset AMT gear shifting rule, vehicle speed fluctuation caused by power interruption is eliminated, the energy loss and speed control instability risks caused by frequent gear shifting are overcome, driving comfort is guaranteed through gear shifting hysteresis control and the minimum vehicle speed threshold value, and safe and energy-saving closed-loop control is formed.

The utility model provides a vehicle speed reducer and an automobile, the vehicle speed reducer comprises a speed reducer shell and a speed reducer body, one side of the speed reducer shell is sunken to form a labyrinth structure, the labyrinth structure is provided with an oil gas cavity, a ventilation channel and an overflow channel, and the ventilation channel and the overflow channel both communicate with the oil gas cavity; the vehicle speed reducer further comprises a labyrinth cover piece and a ventilation valve assembly, the labyrinth cover piece is arranged on the labyrinth structure in a covering mode, the labyrinth cover piece is provided with an air inlet channel, and the ventilation valve assembly is installed on the ventilation channel. A mixture of oil and gas in the speed reducer shell flows into the oil gas cavity through the gas inlet channel, the oil flows back into the containing cavity from the overflow channel, and the gas is discharged from the ventilation valve assembly. According to the vehicle speed reducer, the ventilation valve assembly and the labyrinth structure are integrated on the speed reducer shell, and the air tightness, the dustproof and waterproof performance and the compactness of the whole structure of the speed reducer are improved.

The invention belongs to the technical field of transmission cooling and lubricating, and relates to a transmission rear end forced lubricating and cooling system of a parallel hydrodynamic retarder and a transmission. Comprising a retarder support, a rear cover, an oil pump, a power takeoff side cover, a rear bearing cover, an oil pump diverter valve, a cooling lubricating oil way, an oil filtering plug screw and a net type oil filter. The oil pump diverter valve is used for being connected with an external heat exchanger, oil in an oil way is cooled, the temperature of lubricating oil is effectively reduced, and thermal safety of parts in the box body is guaranteed. Under the condition that other structures of the gearbox are not added, all-directional lubrication inside a rear-end transmission system is achieved, and the structural compactness and the space utilization rate are improved. Lubricating points of the lubricating system are comprehensively covered, oil duct connection of different shells is achieved through butt joint of the cross-joint-surface oil ducts, the lubricating system is compact in design, and the comprehensive performance, safety and reliability of a transmission system are improved in the aspects of heat dissipation, cooling, fatigue and efficiency of the system.

The utility model discloses a fixed four-linkage electric speed reduction elevator which comprises a motor, the output end of the motor is provided with a hole-shaft double-input lead screw speed reduction elevator, the two output ends of the hole-shaft double-input lead screw speed reduction elevator are respectively provided with a double-shaft input lead screw speed reduction elevator, and the two output ends of the hole-shaft double-input lead screw speed reduction elevator are respectively provided with a double-shaft input lead screw speed reduction elevator. The output end of one double-shaft input lead screw speed reduction elevator is provided with the other double-shaft input lead screw speed reduction elevator. According to the fixed type four-linkage electric speed reduction elevator, a middle reverser of a traditional four-linkage elevator is combined with a speed reduction elevator part, so that the middle reverser is omitted, and the reversing function is achieved through the process that the double-input worm is connected with the first arc bevel gear and the second arc bevel gear; by means of the speed reduction transmission characteristic of the worm gear and the worm, more speed reduction ratios can be obtained, the speed reduction ratio of the speed reduction elevator can be selected according to using requirements, and larger platform bearing force and various lifting speeds are achieved.

The invention discloses a combined braking method for a vehicle EBS system and a hydraulic retarder, which ensures that a brake shoe is not overheated due to long-time high-strength braking, and the braking stability is improved. The controller uses different degrees of cooperative braking according to the current working condition, the retarder plays an important role in the whole braking, the load of the friction braking system is greatly reduced, and therefore the stability of the braking system is improved. Braking operation is simple, and the driving intensity of a driver is relieved. Only a brake pedal is used for braking operation, additional operation is not needed, a handle is not needed, and manual braking system switching is not needed. The braking intention completely depends on the opening degree and the treading speed of the brake pedal treaded by the driver, and the driving habit is better met.

The control system comprises a control unit, an oil tank, an oil pump, a heat exchanger, a two-position three-way slide valve, a two-position three-way proportional pressure control slide valve, a switch electromagnetic valve, a proportional electromagnetic valve, a proportional valve and an air source, the air source is respectively connected with the switch electromagnetic valve and the proportional electromagnetic valve, an air outlet of the switch electromagnetic valve is respectively connected with the two-position three-way slide valve and the two-position three-way proportional pressure control slide valve, and an air outlet of the proportional electromagnetic valve is connected with the proportional valve. During working, under the control of the two-position three-way slide valve and the two-position three-way proportional pressure control slide valve, engine oil can quickly enter the brake cavity to quickly generate brake torque, and the proportional electromagnetic valve can control the opening degree of the proportional valve to adjust the flow of the brake engine oil in the brake cavity so as to adjust the brake force. Therefore, the speed changing box has the advantages that the effect taking time of the brake oil cavity is prolonged, engine oil emulsification is prevented, the liquid filling rate is accurately controlled, oil pumping and oil leakage of the speed changing box are prevented, and air loss is reduced.

The utility model discloses a reaction kettle material adding and quantitative feeding device which comprises a reaction kettle main body and a feeding pipe installed on the top of the reaction kettle main body, a feeding bin is arranged on the top of the reaction kettle main body, a circular groove is formed in the feeding bin, a retarding motor is fixedly installed on the right side of the feeding bin, and the retarding motor is fixedly installed on the right side of the circular groove. An output shaft of the retarding motor penetrates through and extends into the circular groove, a rotating shaft is fixedly connected to the output shaft of the retarding motor, and the other end of the rotating shaft penetrates through and extends out of the feeding bin. According to the utility model, the slow-speed motor and the partition plate are matched to realize slow and equal-quantity conveying of materials and ensure that the feeding is accurate and controllable, and meanwhile, the single-time feeding quantity can be flexibly changed by adjusting the position of the movable seat, so that different process requirements are met; and through rotary sliding sealing treatment of a limiting plate and a circular groove and tight attachment of a through groove and a partition plate, it is guaranteed that no leakage exists in the conveying process, attached materials are convenient to clean through the left-right moving design of a movable base, and the equipment maintenance efficiency is improved.

The utility model relates to the technical field of vehicles, and particularly discloses a separation structure of a hydraulic retarder, the hydraulic retarder and a vehicle, a center shaft is provided with a matching groove, the extension direction of the matching groove is parallel to the axial direction of the center shaft, and a rotor assembly is provided with a matching block. The matching block is attached to the groove wall of the matching groove and can slide along the groove wall of the matching groove, and when the center shaft drives the rotor assembly to rotate, the groove wall of the matching groove pushes the matching block to slide in the direction close to the stator assembly. And the matching groove and the matching block are arranged, the extending direction of the matching groove is parallel to the axial direction of the center shaft, the structure is simpler, the requirements for machining equipment and personnel skills are low, and the machining cost is reduced.

The energy-saving speed reducer device comprises a speed reducer, a heat dissipation set is arranged on one side of the speed reducer, a pressure pump is arranged on the upper portion of one side of the heat dissipation set, the input end of the pressure pump is connected with the heat dissipation set, and the output end of the pressure pump is connected with an oil inlet of the speed reducer through a connecting pipe. An oil outlet in one side of the speed reducer is connected with the radiating group through an oil discharge pipe; according to the speed reducer, through arrangement of the pressure pump, lubricating oil in the speed reducer shell can be pumped out for cooling, so that the lubricating quality is improved, through arrangement of the heat dissipation set, the lubricating oil can be cooled, the service life of gears in the speed reducer is prolonged, and the energy loss is reduced; the outer side heat dissipation set can be fixed to the speed reducer and can be adjusted according to the size of the speed reducer, the height of the installation set can be adjusted through the arrangement of the adjusting set, and therefore the heat dissipation device is suitable for speed reducers of different sizes.

The present invention provides a hydraulic retarder fault judgment method, device and vehicle, belonging to the technical field of hydraulic retarders, the method comprising: when the hydraulic retarder stops working, judging whether the engine speed is less than the preset engine speed; when the engine speed is less than the preset engine speed, judging whether the difference between the hydraulic retarder oil temperature and the engine water temperature is greater than a first temperature difference value, and if so, determining that the hydraulic retarder has an exhaust fault; when the engine speed is greater than or equal to the preset engine speed, judging whether the difference between the hydraulic retarder oil temperature and the engine water temperature is greater than a second temperature difference value, and if so, determining that the hydraulic retarder has an exhaust fault; the first temperature difference value is greater than the second temperature difference value. The present invention can judge whether the hydraulic retarder has an exhaust fault by judging the difference between the hydraulic retarder oil temperature and the engine water temperature, thereby improving the safety of the hydraulic retarder.

The application discloses a kind of air path structure and method for inhibiting pump gas loss of hydraulic retarder, belong to vehicle hydraulic auxiliary braking technical field;Air path structure includes air compressor and several air inlet jet devices;Several installation holes and several blades are processed on the fixed wheel of hydraulic retarder;Several blades are evenly distributed on the inner circumferential surface of fixed wheel along the circumference of fixed wheel;Several installation holes are evenly distributed between every two adjacent blades, one end of installation hole is connected with air path structure, and the other end is communicated with the working cavity of hydraulic retarder;Through hole is processed on each air inlet jet device;One end of all air inlet jet devices is merged into a pipeline, and is connected to the air outlet of air compressor by a gas pipe;The other end of each air inlet jet device is respectively and one-to-one installed in the installation hole of fixed wheel.The application injects high-speed air inlet jet into the inside of the working cavity of hydraulic retarder by air inlet jet device, reduces the flow speed of circulating air flow, to inhibit pump gas loss.

The invention provides a speed reducer, a vehicle and a quality detection method. The speed reducer comprises a speed reducer shell, and a containing cavity is formed in the speed reducer shell; the gear shaft is located in the containing cavity, bearing assemblies are arranged at the two ends of the gear shaft, the gear shaft is connected with the speed reducer shell through the bearing assemblies, the bearing assemblies and the gear shaft are arranged in an interference fit mode, and first mounting grooves are formed in the end faces of the bearing assemblies; and the elastic assembly is located in the first mounting groove, part of the elastic assembly protrudes out of the first mounting groove, and the elastic assembly makes contact with the speed reducer shell. The problems that in the prior art, a bearing outer ring creeps along with operation of a speed reducer, and abrasion is generated are solved.

The invention provides a hydraulic retarder control system, a vehicle and a hydraulic retarder control method.The hydraulic retarder control system relates to the technical field of automobile braking systems.The hydraulic retarder control system comprises an oil tank, an oil pump assembly and an oil pump assembly, an oil outlet of the oil pump assembly selectively communicates with an oil inlet of the gearbox through a gearbox adjusting valve; an oil outlet of the oil pump assembly selectively communicates with an oil inlet of the retarder through a first switch valve, and a first oil outlet of the retarder communicates with the oil tank; an oil outlet of the oil pump assembly selectively communicates with an oil inlet of the radiator through a second switch valve, and a second oil outlet of the retarder communicates with an oil inlet of the radiator; an oil outlet of the radiator selectively communicates with one of an oil inlet of the gearbox and an oil inlet of the retarder through the radiator adjusting valve. The problem that in the prior art, the performance of a hydraulic control system of a hydraulic retarder cannot meet the requirement is solved.

The present invention discloses a planetary gear type magnetorheological fluid medium retarder. Permanent magnets are inlaid on the end face of the housing. Due to the magnetic field, the shear stress and viscosity of the magnetorheological fluid in the gap between the rotor and the housing increase, resulting in an increase in damping and thus sealing, reducing leakage to a very small level. At the same time, the magnetorheological fluid also has a lubricating effect, which not only increases the pressure in the working chamber but also extends the service life. At the same time, a porous plate damping structure is adopted at the output port to control the damping at the output port and regulate and control the pressure in the working chamber. Finally, according to the vehicle speed signal, the retardation signal, and the wheel speed, the damping at the output port, the opening degree of the high and low pressure chamber channels, and the damping control are controlled, and the pressure in the working chamber is collected in real time to form a retarder torque closed-loop control, which can achieve a control frequency of 500 Hz to realize high-precision anti-lock performance.

The invention discloses a vehicle braking control method and device, a power domain controller and a vehicle, and relates to the field of vehicle control. The method comprises the steps that whether the execution condition of a downhill constant speed function is met or not is judged; if the execution condition is met, total braking force needed by the vehicle is determined; determining an electric braking force which can be provided by the vehicle at the current vehicle speed; controlling an electric brake to brake so as to provide electric braking force; and controlling the hydraulic retarder to brake so as to compensate the difference value between the total braking force and the electric braking force. The defect that the braking force of the electric brake is insufficient is made up through compensation of the hydraulic retarder besides the braking dominated by the electric brake. The braking force is distributed, so that the vehicle can run downhill at a heavy load according to a set vehicle speed, the economical efficiency of the whole vehicle is guaranteed, electricity feedback is utilized to the maximum extent, and the safety of the vehicle is also guaranteed.

The invention relates to a hydraulic retarder connected to the front end of a gearbox in parallel and a torque control method thereof.The hydraulic retarder comprises a retarder shell, a retarder front cover and a retarder rear cover, the retarder front cover and the retarder rear cover are installed on the two sides of the retarder shell, and a working cavity and a gear train transmission mechanism are installed in the retarder shell; the gear train transmission mechanism comprises a driving wheel connected with the working cavity, a driving wheel in constant meshing connection with the driving wheel, a first retarder shaft and a second retarder shaft, the first retarder shaft and the second retarder shaft are coaxially installed with the driving wheel, the first retarder shaft penetrates through the front retarder cover and then is connected with the engine, and the second retarder shaft penetrates through the rear retarder cover and then is connected with the gearbox. The hydrodynamic retarder is connected to the input end of the gearbox in parallel, the speed ratio of different gears of the gearbox and the speed ratio of the retarder are utilized, the speed increasing and torque increasing adjusting range of the hydrodynamic retarder is enlarged, the hydrodynamic retarder can play a role in braking when a vehicle goes down a slope at a low speed, and the speed increasing and torque increasing effects of the vehicle are improved. And the optimal braking effect of the hydraulic retarder is achieved by adjusting the gear of the gearbox.

According to the multi-medium circulating system based on the hydraulic retarder, a large circulating oil way, a small circulating oil way and an exhaust passage are highly integrated on a retarder shell and a heat exchanger bottom plate, and the large circulating oil way and the small circulating oil way share a large circulating oil outlet channel, a small circulating oil outlet channel and a heat exchanger; an oil outlet exhaust passage, a large-small circulation oil outlet passage and a heat exchanger bottom plate covered channel form an independent exhaust passage, so that gas and oil media achieve efficient cooperation in large-small circulation and exhaust circulation, and meanwhile all-working-condition performance optimization of high torque precision and high continuous braking capacity under the braking working condition and low air loss and low temperature under the idling working condition is achieved. Meanwhile, the oil way is integrally formed on the inner side of the retarder shell, so that the sealing reliability and the structural strength of the system are remarkably improved; the oil leakage and oil pumping faults of the oil duct are completely eradicated from the source, the idling loss and the working temperature are remarkably reduced, the torque control precision is improved, the system integration degree and the operation reliability are improved, and cost reduction and efficiency improvement are achieved.

The invention provides a disconnected hydrodynamic retarder control system and method and a vehicle with the disconnected hydrodynamic retarder control system. The disconnected type hydrodynamic retarder control system comprises a hydrodynamic retarder and a control system, wherein the hydrodynamic retarder is provided with a rotor; the first end of the gear shifting part is movably connected with the rotor, and the second end of the gear shifting part is connected with an output shaft of the transmission; and the adjusting part is connected with the hydraulic retarder, the execution end of the adjusting part is connected with the gear shifting part, and the adjusting part is used for adjusting the rotating speed difference between the output shaft and the rotor. By introducing the gear shifting part and combining intelligent control of the controller, the hydraulic retarder can be adjusted to a proper gear according to different working conditions of a vehicle, flexible adjustment of the braking torque is achieved, mild braking force can be provided in the urban congestion environment, and the braking torque can be adjusted to the proper gear according to the different working conditions of the vehicle. And a stronger braking effect can be provided under the high-speed driving conditions such as long downhill, and the problem that the braking torque gear of the hydraulic retarder in the prior art is difficult to adapt to the requirements under different working conditions is solved.

The utility model relates to a railway retarder puller, including two connecting frames, the outside of connecting frame is all equal interval and is opened with adjusting hole, the inside of adjusting hole is all and is connected with the pivot of sliding, and the pivot is rotatably connected with two connecting rods between corresponding two, and the recess of two connecting frames is close to and is equipped with the first handle, and the top of first handle is rotatably connected with the first connecting rod. The utility model has the advantages that the cooperation and design of adjusting hole, pivot and connecting rod make the puller can adapt to different specifications of retarder, enhance the versatility of the device, the lever linkage structure that connecting rod, first handle and second handle form effectively reduces the force required for puller operation, improves the operation efficiency, and the cooperation mode of multi-component hinging guarantees the stability of clamping and puller process, prolongs the service life of the device.

The present invention relates to the field of mechanical transmission technology, and particularly relates to a multi-stage retardation device. The multi-stage retardation device includes: a sealing assembly, a stator, a rotor assembly, and a medium adjustment assembly; there is liquid in the sealing assembly, the stator and the rotor assembly are combined into a positive displacement pump, a throttle orifice is provided at the liquid outlet of the positive displacement pump, and the medium adjustment assembly changes the throttling damping effect of the throttle orifice by adjusting the viscosity of the medium. The rotor assembly is connected to an external component to be retarded, and the external component to be retarded drives the rotor assembly to rotate, generating high pressure at the liquid outlet, and generating resistance under the throttling effect of the throttle orifice. The mechanical energy of the rotor assembly is converted into the pressure potential energy of the liquid and then into heat energy to generate braking force. The multi-stage retardation assembly provided by the present invention uses the mechanical energy of the component to be retarded itself for energy conversion to achieve retardation braking, and has remarkable energy-saving effects.

The invention provides a lubricating structure of a retarder, which enhances the lubricating effect on a side oil seal of the retarder, reduces the ablation condition of the oil seal and prolongs the service life of the retarder. The retarder comprises: a retarder housing; the outer end of the transmission shaft is sleeved with a first bearing, and the inner end, corresponding to the position of the gearbox, of the transmission shaft is sleeved with a gear and a second bearing; a gearbox side oil seal; a retarder side oil seal; an oil seal seat; the pump comprises a pump shaft and a vane pump wheel; a partition sleeve; and a pump chamber mounting assembly.

The invention provides an underground trackless transport vehicle with an electromagnetic retarding system, and belongs to the technical field of mining transport vehicles. According to the underground trackless transport vehicle, vehicle operation parameters are collected in real time to establish a dynamic state matrix, speed and acceleration change characteristics are extracted by using a sliding time window method, risk working condition points are identified and are subjected to space-time alignment with a roadway position, and the risk working condition points are determined; a dominant working condition and a disturbance working condition are separated through singular value decomposition, a Pareto optimization model is adopted to solve a braking torque reference value, then a Stackelberg game model is utilized to carry out two-layer hierarchical collaborative optimization on an electromagnetic retarding device and a hydraulic braking system, and control parameters are corrected in real time through a dynamic compensation mechanism. The technical problem that an underground trackless transport vehicle is difficult to realize collaborative optimization control of an electromagnetic retarding device and a hydraulic braking system in a complex and changeable roadway slope environment is solved.

The embodiment of the present invention discloses a method, device, equipment and medium for determining the filling rate state of a hydraulic retarder. The method comprises: when it is detected that the hydraulic retarder of a target vehicle is in a working state, determining the current vehicle information of the target vehicle; determining the target braking torque of the hydraulic retarder according to the current vehicle information, the target braking torque including the current braking torque and the rated braking torque; determining the braking torque deviation rate of the hydraulic retarder according to the target braking torque; and determining the current filling rate state of the hydraulic retarder according to the braking torque deviation rate. This technical solution can accurately identify the filling rate of the hydraulic retarder during the actual driving process of the vehicle, has strong practicality, and can better meet the actual vehicle detection needs.

1. The name of the design product: hoisting tool (automatic transmission retarder). 2. The use of the design product: hoisting for retarder assembly, housing and main shaft. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a fault detection method and system for a hydraulic retarder in a vehicle and the vehicle. The vehicle comprises the hydraulic retarder and the transmission, and the hydraulic retarder and the transmission are used for providing braking force for the vehicle. The method comprises the steps that current liquid filling information and first rotating speed information of the hydraulic retarder are obtained; based on the current liquid filling information and the first rotating speed information, the current braking torque of the hydraulic retarder is determined; in response to the situation that the current braking torque is smaller than the braking torque threshold value, the hydraulic retarder is detected based on the current liquid filling information, and a first fault detection result is obtained; and in response to the first fault detection result that the hydraulic retarder is not in the internal fault state, the hydraulic retarder is detected based on the first rotating speed information and second rotating speed information of the transmission, and a second fault detection result is obtained. The technical problem that the fault determination accuracy of the hydraulic retarder in the vehicle is low is solved.