359 results about "Retarder" patented technology

A privacy display comprises a spatial light modulator and a passive retarder arranged between first and second polarisers arranged in series with the spatial light modulator. On-axis light from the spatial light modulator is directed without loss, and off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field of view. Off-axis visibility of the display in an automotive vehicle can be reduced.

The multiple axle driving system for mixed power automobile with fuel oil and electric energy as power source includes at least one mechanical driving axle assembly, at least one electric driving axle assembly, one power source assembly, one general controller, one monitoring and communication network system, and one engine and one multifunctional double-rotor motor to drive different axles separately. The double-rotor motor consists of one outer rotor and one inner rotor, the outer rotor is connected to the hub in one side through the reducing mechanism and the versatile transmission mechanism, and the inner rotor is connected to the hub in the other side through the reducing mechanism and the versatile transmission mechanism. The multiple axle driving system integrates the technology and functions of complete mixed power, multiple axle driving, etc. and makes the automobile possess the advantages of easy realization, low cost, raised running smoothness and stability, etc.

A controller for the master brake of car and the decelerator including electric eddy one and engine exhaust one is composed of microcomputer, the driver unit for the electric eddy decelerator, the driver for the electromagnetic valve of engine exhaust decelerator, power switching module, feedback detecting circuit, and sound-light alarm circuit. Its control method is also disclosed.

The invention discloses a passenger car driving data recording device and a method for accident analysis by using the device. 13 types of sensors and switches such as a steering wheel rotary angle sensor, a retarder gear switch and an XYZ three-axis acceleration sensor are installed at the passenger car; exact time when an accident occurs is recorded by using a real-time clock, and various data collected is stored by a Flash memory. Simultaneously, the device carries out data transmission and communication by various interfaces including CAN bus, and an iButton interface is used for identifying the identity of a driver; the whole device finishes signal acquisition, processing and storage by an ECU processor and a peripheral modulate circuit. Matched software can completely show the operation actions of the driver and the working conditions of the passenger car in the driving process so as to carry out accident analysis for the passenger car having accidents and restore actual conditions in the process of accident, thereby providing original reference data as efficient auxiliary decision support of claim settlement for accident recording and discrimination, doubtful points analysis of accident and responsible party confirmation of accident.

A hydrodynamic retarder (1) comprises a working chamber (6), which is formed by a primary blade wheel (4) and a secondary blade wheel (5). Between the blade wheels, a circulating flow of a working medium develops during braking of the retarder. To this end, at least one valve device (12, 13) for controlling the inflowing and / or outflowing volumetric flow rate of the working medium is provided. A temperature sensor (25) is disposed on the side of the at least one valve device that faces the working chamber (6).

The invention discloses a long-downgrade self-adaptive retarder for a passenger vehicle and a control device and method thereof. The method comprises the steps that 1, current driving road informationof the passenger vehicle is detected; 2, a downgrade gradient, and a self-vehicle gear and a current vehicle speed of the passenger vehicle are detected, and the safe and stable speed and the safetyspeed of each level of the passenger vehicle under the current gear are obtained; 3, a corresponding braking mode is determined, and the retarder is controlled to automatically turned on and a corresponding retarder gear is selected; 4, after the retarder is turned on, a retarder excitation current is adjusted to realize accurate braking torque compensation of the retarder; and 5, the vehicle speed of the passenger vehicle is continuously detected in the braking process, and if the vehicle speed is less than or equal to the safe and stable speed of the passenger vehicle at the current gear andthe gradient, the retarder is turned off. The long-downgrade self-adaptive retarder for the passenger vehicle and the control device and method thereof realize the accurate braking torque compensation of the retarder, complete the deceleration process with higher braking efficiency, and ensure that the passenger vehicle can safely and effectively complete the braking and deceleration downgrade.

The invention discloses the joint controller and the control method of an eddy current retarder and a automotive friction brake. The invention causes various switching signals, automotive traffic speed pulse signals and automotive braking pedal positions are inputted circuits and are connected with a micro-computer, which has a plurality of input / output ports; the central processing unit (CPU) receives the digital signals transmitted by the input / output ports, the counting results of counters and digital results of analog-digital converters (ADC) through internal bus, and transfers control signals out after logical judgment and numerical computing; when drivers do not put through joint control switches and do not receive the switch signals of joint controlling, the joint controller takes the automotive speed and acceleration as input parameters to adjust the output moment of the eddy current retarder, and the automotive speed can be maintained stability, so that the aims dual-mode brake and improving safety of vehicle traffic can be attained.

This invention relates to a turbo buffer drive controller and its control method, which comprises one turbo buffer and one connected drive controller and the auto power system. The DSP processor stored procedure executes the following steps: starting to setting quota to testing speed to staring speed lamp to testing the block overflow to controlling the short to open to testing the abnormal current to testing input of ABS to testing constant control to testing the braking input signal to opening relative block and to displaying the output status.

The invention relates to the field of engineering machinery, and discloses a vehicle cooling system, a control device and a control method of the vehicle cooling system, and engineering machinery. The vehicle cooling system comprises a heat radiator, a first fan, a second fan, an engine cooling pipeline and a hydrodynamic retarder cooling pipeline, wherein the first fan is arranged in a first cooling area of the heat radiator; the second fan is arranged in a second cooling area of the heat radiator; the engine cooling pipeline is connected with the hydrodynamic retarder cooling pipe to form a cooling loop; and the cooling loop is provided with a cooling liquid outlet and a cooling liquid inlet which are respectively communicated with the outlet end and the inlet end of the heat radiator. Compared with the prior art, the cooling effect of the vehicle cooling system can meet cooling requirements under different situations, so that the cooling ability of the system can be guaranteed, the cooling efficiency of the system is improved, and unnecessary energy waste is avoided; in addition, the vehicle cooling system is low in cost and occupies a small space.

A switchable privacy display for an automotive vehicle comprises a spatial light modulator, a first switchable liquid crystal retarder and first passive retarder arranged between a first pair of polarisers and a second switchable liquid crystal retarder and second passive retarder arranged between a second pair of polarisers. A first switchable liquid crystal retarder comprises a two homeotropic alignment layers and a second switchable liquid crystal retarder comprises two homogeneous alignment layers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss to the passenger, whereas off-axis light has reduced luminance to reduce the visibility of the display to off-axis driver leaning towards the display. In a shared mode of operation, the liquid crystal layers are controlled so that off-axis luminance and reflectivity are unmodified.

The invention relates to a coolant circuit of a motor vehicle, comprising: a coolant, especially water or a water mixture; a coolant pump having a coolant outlet; a retarder provided with a central ring, the working medium thereof being the coolant; a reversing valve in the flow direction upstream of the retarder, and a bypass section for bypassing the retarder, such that the retarder can be connected to and disconnected from the coolant circuit. According to the invention, the coolant pump is arranged in the flow direction, upstream of the retarder, in such a way that it pumps coolant into the retarder when the retarder is connected, and pumps coolant past the retarder via the bypass section when the retarder is disconnected. The inventive motor vehicle coolant circuit is characterised in that, when the retarder is connected, the total flow resistance from the outlet of the coolant pump to the central ring of the retarder is lower than the total flow resistance of the coolant circuit to be overcome by the coolant pump in the non-braking mode.

A method of operating a retarder control system for a drivetrain retarder such as an engine compression brake of a heavy-duty truck vehicle is disclosed. The method of operation includes three novel subsets each of which controls the operational state and the resistance level at which the drivetrain retarder is operated dependent at least partially upon one or more factors including speeds of one or more drivetrain components, vehicle speed, rotational speed of one or more undriven wheels, position of a brake control member, elapsed time of activation of a brake control member and / or elapsed time from a change in a selected resistance level at which the retarder control system is commanded to effect operation of the drivetrain retarder.

The invention provides a controller and control method of an eddy-current retarder of a combined braking system, relating to automobile eddy-current retarders. The controller comprises a minicomputer, a high-power transistor driving circuit, a braking pedal positioning sensor, a current feedback circuit and an eddy-current retarder combined switch. After a braking pedal is pedaled down, the controller switches off a gear grading control, calculates the size of an automobile real-time braking force and then calculates the gradient of the automobile according to a PWM (Pulse Width Modulation) control signal of the eddy-current retarder, the input of the braking pedal position sensor and the variation of the speed pulse of the automobile, then inquires a proportion of the automobile downslope braking force shared by the eddy-current retarder, which corresponds to the gradient and is prestored in an internal memory, applies a PWM control signal with corresponding duty ratio to an electromagnetic coil of the eddy-current retarder, outputs a certain braking torque, ensures that the eddy-current fully exerts the auxiliary braking effect on different slopes while satisfying normal operation conditions and simultaneously lightens the operation intensity of a driver.

The invention discloses a hydrodynamic retarder. The hydrodynamic retarder comprises a case (1) and a transmission main shaft (2), a front rotating impeller (3) and a rear rotating impeller (4) are arranged on the transmission main shaft (2), a braking pressure regulating switch, a gear pump and a water pump are arranged on the case (1), the gear pump is connected with the transmission main shaft, the water pump is connected with the gear pump, the front rotating impeller (3) is connected with the transmission main shaft (2) through a driving wheel flange (5), the rear rotating impeller (4) is connected with the transmission main shaft (2) through a planetary gear set, and oil inlet holes (6) and oil outlet holes (7) are uniformly arranged on the front rotating impeller (3). The hydrodynamic retarder has the advantages that the structural design is reasonable, the braking efficiency is high, the reliability is high, simultaneously the manufacturing is simple, the manufacturing cost is low, and the service life is long.

The invention relates to the technical field of a high-speed railway roadbed maintenance material, in particular to a special slurry pressing material for high-speed railway roadbed rush repair reinforcement and a grouting method thereof. The special slurry pressing material is prepared from the following raw materials in percentage in mass: 40 to 90 percent of high early strength sulphoaluminate cement, 1 to 5 percent of silica micro powder, 3 to 7 percent of anhydrite, 0.01 to 0.1 percent of plastic expansion agents, 0 to 55 percent of sand, 0.2 to 0.35 percent of water reducing agents, 0.01 to 0.1 percent of hardening accelerators, 0.1 to 0.3 percent of retarders, 0.01 to 0.1 percent of stabilizing agents, 0.02 to 0.1 percent of antifoaming agents and 0.1 to 1 percent of emulsion powder. The slurry pressing material has the technical characteristics that the filling performance is good (a pipe is not plugged); the hour intensity is high; the fast construction requirements are met; the bonding with the base surface is firm; the volume stability and durability are high, and the like. The requirements of repeated impact on the roadbed during the train operation without damage can be met; the whole construction method is simple; the speed is high. By using the method, the reinforcement treatment on the existing railway roadbed can be completed in the limited time at the night skylight point of the high-speed railway operation period; the normal driving safety in a next day is not influenced; the requirement of the high-speed railway repair on the time can be met.

The invention relates to a vehicle thermal management method and a vehicle thermal management system. In the method, an operator selects one cooling mode from an economical cooling mode and a reinforced cooling manner, a thermostat starting temperature corresponding to the selected cooling mode, a thermostat fully-starting temperature corresponding to the selected cooling mode and multiple first set gear shifting temperatures corresponding to the selected cooling mode serve as a first set temperature, a second set temperature and multiple first calibration temperature values. When the water outlet temperature of an engine is increased to the first set temperature, part of the thermostat is started; when the water outlet temperature of the engine is larger than the first set temperature and is increased, the opening degree of the thermostat is increased; when the water outlet temperature of the engine is increased to the second set temperature, the thermostat is fully started; and every time the water outlet temperature of the engine is increased or reduced to one first calibration temperature value, gear shifting is conducted on a fan. The system comprises a selector, a sensor, the fan and the thermostat. By means of the vehicle thermal management method and the vehicle thermal management system, the vehicle cooling purpose can be achieved when a retarder is started on the premise that the cost is increased as less as possible.

The invention discloses a hydrodynamic retarder with a front stator. The retarder comprises a retarder shaft, a front bearing, a stator, a rotor, a stator end cover, a body, a separation spring, an annular piston, a meshing gear, a locking sliding framework, a return spring, a synchronous locking ring, a needle roller bearing, an outer oil seal and the like, wherein a high-pressure oil outlet cavity B is closed by the stator and the stator end cover, a low-pressure oil inlet cavity A is formed by closing the retarder shaft; the stator is arranged in front of the rotor, the rotor is arranged behind the stator, and the stator and the rotor are arranged in a closed cavity in the body; a sealing ring is arranged between the rotor and the stator and is used for isolating a working cavity C fromthe oil inlet cavity A; when no load exists, a meshing gear is pushed by a separation spring to move rightwards to a right positioning dead point, the meshing gear is separated from the rotor, the rotor does not rotate with the shaft any more, and thereby no-load loss can be caused even though a small amount of media exist in the working cavity C; an oil duct is arranged in front of the stator, the radial size is reduced, and interference with a transmission shaft is avoided. The retarder is advantaged in that the weight is reduced to the maximum extent, noise is reduced, strength and reliability are improved, and no-load loss is reduced.

The invention relates to a self-excitation retarding device and a control method thereof. The self-excitation retarding device comprises a stator assembly, a rotor assembly and a control assembly, the rotor assembly comprises an eddy current brake rotor and a power generator rotor, the stator assembly comprises a stator support, an eddy current brake stator iron core, a coil winding assembly and a power generator stator iron core, and the control assembly comprises a first solid state relay, a rectifier, a second solid state relay and a third solid state relay. The stators of a retarding and braking portion and a power generating portion are integrated highly, so that the self-excitation retarding device is compact in structure, and both size and mass are reduced to some extent; a power generator stranded wire and an eddy current brake stranded wire are directly connected, so that alternating current output by the power generator stranded wire can be directly fed into the eddy current brake stranded wire, and the self-excitation retarding device can output large braking moment when an automobile travels at a low speed.

The invention relates to the technical field of engineering vehicle, particularly to a vehicle power take-off system and method. The vehicle power take-off system aims at achieving a power take-off function on the basis of only equipping a retarder without a power take-off. The vehicle power take-off system comprises a power device, a clutch, a mechanical automatic gearbox, a transfer case, a power take-off clutch, a power take-off switch, a vehicle control unit and an anti-lock system, wherein the mechanical automatic gearbox comprises a mechanical gearbox body and a gearbox control unit; thetransfer case comprises a front axle output shaft and a power take-off output shaft and controls to transmit disconnecting signals or connecting signals of the front axle output shaft; the power take-off clutch transmits disconnecting signals and connecting signals of the power take-off output shaft; the power take-off switch transmits power take-off signals or power take-off stopping signals tothe vehicle control unit; the vehicle control unit receives the disconnecting signals or the connecting signals of the power take-off output shaft, the disconnecting signals or the connecting signalsof the front axle output shaft, and the power take-off signals or the power take-off stopping signals, and transmits the power take-off signals or the power take-off stopping signals to the gearbox control unit.

The invention relates to a method for controlling the power transmission of a hydrodynamic retarder, comprising a circulating rotor having vanes and a stator having vanes or a counter-rotating rotor having vanes circulating in the opposite rotational direction to the rotor, which together form a working chamber that can be filled with operating medium by means of an inlet and that can be emptied by means of an outlet, wherein the working chamber is filled in a brake operation with operating medium and a brake torque is generated with the hydrodynamic retarder and, in a non-braking operation, the working chamber is emptied to a specific residual amount of operating medium and substantially no brake torque is generated with the hydrodynamic retarder.; The invention is characterised by the following step: In the non-braking operation, by means of an idling pump, operating medium is conveyed from an operating medium reserve, which is provided outside the working chamber in an operating medium reserve tank, into the working chamber of the hydrodynamic retarder for the adjustment of the residual amount.

The invention discloses a pump type magnetorheological fluid retarder. The retarder is characterized in that a retarder shaft is in anti-torque driving connection with a pump, a steel plate is installed in the retarder body and divides the retarder body into a left high-low pressure area channel and a right working cavity, a magnetizable material silicon steel plate and a working magnetic coil aremounted on the side of the working cavity, the pump is arranged in the right working cavity separated by the retarder body and the steel plate, the working cavity and the high-low pressure area channel are filled with working medium magnetorheological fluid, and a magnetorheological fluid valve is arranged in a left channel of a steel plate hole of the steel plate high-pressure area. In the working temperature range, viscosity of the magnetorheological fluid is slightly influenced by the temperature under the action of a magnetic field, the viscosity is proportional to the magnetic field intensity, controllability is excellent, the maximum braking force controllable, the maximum braking force can be far greater than that of a common hydraulic retarder, the retarder is stable in braking force, can generate the same braking force at a low rotating speed, can generate the required retarding braking force at any vehicle speed, is not only used for long slopes under mountain roads, but further can be widely used for meeting the requirement of frequent speed reduction of urban vehicles, main braking can be replaced to implement braking, and the use frequency of a main brake can be greatly reduced.

The invention belongs to the technical field of combined braking control technologies for explosion-proof vehicles in coal mines, and particularly relates to a control system for hydraulic-mechanicalcombined braking of an explosion-proof vehicle in a coal mine. The control system comprises a mechanical braking control system and a hydraulic braking control system. The mechanical braking control system comprises a series double-loop braking valve, an energy accumulator I, an energy accumulator II, a prefill valve, a hydraulic pump, a one-way valve I, a parking braking valve, a manual pump anda safety valve. The hydraulic braking system comprises a gas storage tank, a safety valve, a knob switch valve, a gear control valve, a liquid-air proportional pressure reducing valve, a one-way valveII, a one-way valve III, a pressure regulating valve I, a pressure regulating valve II, a shuttle valve I, a shuttle valve II, a control valve, an oil-gas separating device, an exhaust pipe, an exhaust valve, a retarder and an oil pool. According to the control system, hydraulic braking and mechanical-hydraulic combined braking control can be switched, the reliability of vehicle braking and vehicle operation safety are improved, and safety accidents of the vehicle are effectively reduced.

The invention relates to a hybrid electric vehicle based on a hydraulic retarder and a control method thereof. A driving system comprises a driving motor, a power battery, an engine, the hydraulic retarder, a clutch, a power coupling, a transmission, a vehicle axle and the like, wherein an output shaft of the engine is connected with a movable wheel input shaft of the hydraulic retarder, and a movable wheel output shaft of the hydraulic retarder is connected with a first input shaft of the power coupling through the clutch. A corresponding heat management system consists of a heat radiator, a cooling fan, a main path water pump, a second switch valve, a first switch valve, a bypass water pump, a cooling pipeline, and a hydraulic retarder control valve, wherein the driving motor, the power battery, a cooling water jacket of the engine and a working cavity of the hydraulic retarder are respectively connected with a heat radiator in parallel.

The cover is designed basically by dividing the fabric to pleats, with 15 cm width parallel to the vehicle width, the pleats are arranged in continuous pairs over each other inside U-shaped bag stored inside luggage compartment. The bag has in its lower side a built-in spring retarder roller, used to pull back the fabric pleats using a net of guide cords distributed throughout the pleats. After the bag is pulled out from the trunk and is fixed around the rear bumper, the accordion fabric is pulled using a pulling stick tell covering the whole vehicle, then it's secured under the front bumper and around the vehicle's bottom side. When the fabric is released, the retarder roller pulls the hinged pleats back, through cords, tell it is gathered inside the bag, which will be returned to trunk.

The invention discloses a cooling system matched with a hydrodynamic retarder. The cooling system comprises an expansion water tank, a radiator, a coolant pipeline penetrating through an engine, and the retarder. An outlet of the expansion water tank communicates with the coolant pipeline. An outlet of the radiator pumps a coolant into the coolant pipeline of the engine through a water pump. Through an auxiliary box radiator, the coolant enters the retarder after flowing out of the engine. An outlet of the retarder communicates with the water pump of the main radiator through an electronic thermostat. Under combined control of the auxiliary radiator of the cooling system, an electric fan of the auxiliary radiator and the retarder, the problem that when the wax type thermostat is not opened in time, the non-cooling coolant of the small cycle part participates in the heat exchange cycle of the retarder is solved effectively, the cooling system is designed in a water inlet pipeline of the retarder, the effect that the auxiliary radiator always conducts heat dissipation when the retarder works can be ensured, and through the control over the electric fan of the auxiliary radiator by the retarder, the effect that the auxiliary radiator is always in the best heat dissipation state when the retarder works.

The invention discloses an intelligent control system and method of a hydraulic retarder. The system comprises a hydraulic retarder driving wheel speed sensor,and the speed sensor is connected to a fuzzy PID controller of the hydraulic retarder and used for detecting the speed of a hydraulic retarder drive wheel and transmitting a detected speed signal of the hydraulic retarder drive wheel to the fuzzy PID controller of the hydraulic retarder; the fuzzy PID controller of hydraulic retarder is used for receiving the speed signal transmitted by the hydraulic retarder driving wheel speed sensor, conducting on-line self-tuning on the speed signal and then sending out a control command signal obtained after online self-turning. The slow-down effect of the system is continuous, and the driving safety is improved. Practice proves that the hydraulic retarder has a satisfying braking assisting effect, and becomes the first choice of high-grade and large-tonnage commercial vehicles.

The invention provides a radiating system of a vehicle matching hydraulic retarder, which comprises an engine and a cooling loop system connected with an engine cooling channel; a hydraulic retarder is arranged on the cooling loop system; a water outlet pipe of the hydraulic retarder is linked with an assistant cooling pipeline in parallel, and a control module for controlling its conduction is arranged on the assistant cooling pipeline when the water effluent temperature of the hydraulic retarder exceeds a preset value. The assistant cooling pipeline is linked to the water outlet pipe of thehydraulic retarder in parallel, and water temperature is monitored by the control module; when the monitored effluent temperature exceeds the preset value, the assistant cooling pipeline is conducted,thus the assistant cooling pipeline is connected to the cooling loop system to cool together, the cooling ability of the vehicle radiating system is improved, and the cooling requirement of the vehicle cooling system is satisfied. The invention further provides a vehicle.

The invention relates to the technical field of retarder control, and discloses an intelligent controller of a hydrodynamic retarder, which comprises a vehicle speed signal, a power supply system, a whole vehicle CAN signal and an engine exhaust brake, and is characterized in that the vehicle speed signal is connected with the intelligent controller of the hydrodynamic retarder; the power supply system is electrically connected with an intelligent controller of the hydrodynamic retarder, and the engine exhaust brake is connected with the intelligent controller of the hydrodynamic retarder; theinvention further discloses a control method of the intelligent controller of the hydrodynamic retarder. The invention aims to enable a user to operate easily, control the hydrodynamic retarder to work stably, better, safely and reliably, increase a CAN bus communication interface, realize communication information interaction with other equipment of a vehicle, reduce control lines and improve the reliability.

The invention discloses a braking and retarding integration supporting bridge for a trailer. The braking and retarding integration supporting bridge for the trailer comprises a supporting bridge part,a hydrodynamic retarder part, an accelerating mechanism part, a heat dissipation circulating system and a control module. The supporting bridge part comprises supporting bridge housings, hubs and endcovers, the hydrodynamic retarder part comprises left stator impellers, right stator impellers and rotor impellers, and the accelerating mechanism part comprises sun wheels, planet wheels and gear rings. The hydrodynamic retarder is designed at the position of an original braking mechanism, the rotor impellers of retarders and the sun wheels of accelerating mechanisms, the right stator impellersand the gear rings and the hubs and planet carriers are integrally designed, and power is provided for the retarders. A friction braking mechanism and a braking drum are removed from the whole bridge,the weight of the whole bridge is greatly reduced and overally, two modes of braking and retarding of the retarders are controlled by air pressure, adjustment and classification of the moment of force are realized, and the sensitivity of vehicle operation and the driving safety are enhanced.