290results about "Regenerative braking" patented technology

The embodiment of the invention provides a rail train brake control system and relates to the field of rail transit. The rail train brake control system comprising a single brake control unit, a wholetrain brake control unit, a traction control unit and a communication control unit is characterized in that the single brake control unit is arranged in each carriage of a rail train; the whole trainbrake unit and the communication control unit are arranged in the carriages located on both ends of the rail train; the traction control unit is arranged in power cars of multiple carriages; the single brake control unit, the whole train brake control unit, the traction control unit and the communication control unit realize communication through gateway. Further provided is a train comprising the above-mentioned system. The rail train brake control system has the advantage of realizing flexible grouping of the train with each carriage provided with the single brake control unit to apply airbraking force, each power car provided with the traction control unit to apply electric braking force, and the whole train brake control unit adopted to conduct centralized control.

The invention discloses a control method for a hydraulic dual motor-driven electronic hydraulic braking system based on torque control. The control method comprises the following steps: judging whether the braking system is in failure, determining the adjustment torque T2 of a second motor in a second electronic control straight line motion module if the braking system is not in failure so as to match the second motor with the force of treading a brake pedal by a driver and regenerative brake force to generate a braking torque, and obtaining target braking force; meanwhile determining the adjustment torque T1 of a first motor in a first electronic control straight line motion module so as to provide the brake pedal feeling of the driver by the first motor; if the braking system is in failure, controlling electromagnetic valves through a switch to realize the switching of system braking modes under different failure conditions. The control method disclosed by the invention is accurate in control and high in response speed, and has good robustness; under the precondition of realizing the braking intention of the driver, a good braking feeling is provided for the driver, and hydraulic force is actively controlled, so that maximum recycling for braking energy is realized, and the braking requirement of automatic driving vehicles is met.

The invention discloses a regenerative braking system based on ESC hardware. The system comprises a brake pedal unit, a vacuum booster unit, a brake master cylinder unit, a hydraulic execution unit, four wheel cylinders, four wheel speed sensors, an ESC control unit, a vehicle control unit, a motor control unit and a battery control unit. The brake pedal feeling the same as that of a traditional hydraulic braking system can be guaranteed, no brake pedal travel simulator needs to be additionally mounted, when the ESC hardware fails, backup braking the same as that of the traditional hydraulic braking system can be provided, and the braking safety is guaranteed. Regenerative braking is finished through a drive motor, the hydraulic execution unit is used for finishing hydraulic braking, and a braking scheme which is low in cost and easy to implement and integrates regenerative braking and ESC is provided.

The invention relates to the field of vehicle engineering and discloses an electric power-assisted braking system with composite functions. The electric power-assisted braking system comprises a brake pedal displacement sensor, a brake pedal, a pedal travel simulator, an electric power-assisted assembly, a main cylinder, a wheel cylinder, a hydraulic control unit, a liquid storage tank, a motor, a deceleration and torque increment mechanism, an electronic control unit, a normally open electromagnetic valve, a normally closed electromagnetic valve and a vehicle-mounted other sensor. By designing the pedal travel simulator, decoupling of friction braking force and regenerated braking force can be achieved, and continuous variable crural feeling is provided; a motor assisting device, a brake anti-lock system and the hydraulic control unit can be integrated, and an active braking function is achieved; and no interference exits between motor input and driver input, active braking can be achieved through the motor, and the electric power-assisted braking system can serve as a brake actuating mechanism of intelligent automobiles and unmanned automobiles.

A braking control system and a method for an eco-friendly vehicle are provided to resolve discrepancy in braking force occurring during switching between hydraulic braking and regenerative braking. The system includes a deceleration determiner that determines target and actual decelerations of the vehicle based on collected information when braking and a torque calculator that calculates target and actual deceleration torques from the determined target and actual decelerations of the vehicle using vehicle equivalent inertia information. An error calculator calculates a torque error and a torque corrector corrects a pre-correction target regenerative braking torque by the calculated torque error and calculates a post-correction target regenerative braking torque. A motor controller adjusts a regenerative braking torque of a motor according to the calculated post-correction target regenerative braking torque.

The invention provides a braking system for a high-speed railway train set. The braking system comprises a braking controller, a composite electric braking control executing device and an air brakingcontrol executing device. A braking controller receives a braking-level instruction, weather information, train load information and train speed information which are sent out by a driver, and brakingforce calculation and distribution are conducted; and the composite electric braking control executing device selects and controls the braking modes including regenerative braking and energy consumption braking, and electric braking force is generated through an inversion device with the braking function and a motor. According to the braking system for the high-speed railway train set, braking control of the high-speed railway train set is optimized, the positive effects in multiple aspects that electric energy is recycled, comfort during train braking is improved, the braking time and the braking distance are reduced to the largest extent so as to facilitate maintenance of a foundation braking device are achieved, and the potential application and popularization value is achieved.

The invention discloses a novel full decoupling electronic hydraulic power-assisted brake system, comprising a main power source, a pedal feeling simulation mechanism, and a failure backup operating mechanism which acts on a main cylinder. A motor of the main power source slows down through a worm and a wormwheel, and rotation motion of the motor is converted to translation of a rack through a gear and the rack. Through a first section spring A, a first section spring B, and a second section spring of the pedal feeling simulation mechanism, pedal driving feeling is simulated. A failure protective jacket, a busing, and a locking sleeve of the failure backup operating mechanism control movement of a piston in the main cylinder, so as to act on a wheel brake through a vehicle body stability control system/anti-lock braking system, so as to generate corresponding braking force. The system has pedal simulation modular design, providing convenience for realizing adjustable pedal feeling, and providing convenience for system actual vehicle arrangement and maintenance. Combined with conventional ABS/ESC, active brake, and recovery of brake energy and failure protection are realized. The system is suitable to be used for blade electric vehicles and hybrid vehicles.

According to some embodiments, an electronic drive circuit is disclosed. The electronic drive circuit includes an energy storage device and a first bridge circuit coupled to the energy storage device. The first bridge circuit includes at least one leg having two switches. The electronic drive circuit also includes a transformer. The transformer includes a first winding coupled to the first bridge circuit and a second winding coupled to the energy storage device through a center tap. The electronic drive circuit further includes a second bridge circuit coupled to the second winding of the transformer. The second bridge circuit includes a pair of switches operable to conduct in both directions and block voltage in both directions. The electronic drive circuit additionally includes a DC bus coupled to the second bridge circuit and a controller, which is configured to buck or boost a DC voltage from the energy storage device to supply to the DC bus as well as buck or boost a DC voltage from the DC bus to supply to the energy storage device.

A system and method of controlling regenerative braking of an eco-friendly vehicle are provided. The system eliminates a motor over-temperature state during regenerative braking, effectively prevents a chattering phenomenon in which regenerative braking torque is repeatedly increased and reduced after the motor over-temperature state, and consequently, improves the braking safety and operability of the vehicle. A torque output rate for motor regenerative braking torque limitation is determined from a current motor load and motor temperature using setting information when a motor over-temperature state is detected. Then, a final regenerative braking torque is determined by multiplying a motor regenerative braking torque, calculated from information including battery chargeable power and a driver braking operation value, by the determined torque output rate. Thereafter, regenerative braking of a motor is adjusted based on the determined final regenerative braking torque.

The invention discloses a hydraulic auxiliary driving system with energy recovery and speed slowing functions. The hydraulic auxiliary driving system comprises a controller, an engine, a power takeoff, a hydraulic pump/motor, a hydraulic control valve bank, an energy accumulator, a pressure indicator, a hydraulic oil tank and the like, wherein the hydraulic pump/motor is connected to a PTO port of the engine by a rotating shaft through a flange; the hydraulic pump/motor, the hydraulic control valve bank, the energy accumulator and the oil tank form a hydraulic loop; and the hydraulic pump/motor is connected to the hydraulic oil tank by the hydraulic control valve bank and the energy accumulator. According to the system, the driving force of the whole vehicle on an upward slope is improved, and power is supplied during vehicle starting; energy recovery is realized during vehicle braking; an effect of a retarder is achieved; and the running economical efficiency of the whole vehicle can be favorably improved by a proper control strategy.

A brake system for a vehicle having a master brake cylinder, which provides a pressure signal, having a brake-medium reservoir connected to the master brake cylinder, and a first brake circuit, which is coupled by a first input to the master brake cylinder and by a second input to the brake-medium reservoir, and having at least one first wheel brake cylinder, which is mounted at a first wheel, in order to exert a force corresponding to the pressure signal onto the first wheel, and having a separator valve, which is configured between the first input and the first wheel-brake cylinder, to prevent further transmission of the pressure signal upon receipt of a supplied closing signal; and having a control valve, which is configured between the first input and the first wheel-brake cylinder; in order to control an inflow of a brake medium from brake-medium reservoir to the first wheel-brake cylinder. In addition, a method for controlling a corresponding brake system is also described.

A regenerative braking control method of a hybrid vehicle may include determining whether to perform regenerative braking in a regenerative braking determining step, determining whether to stop an engine in an engine stopping determining step, and performing shifting to a lowest gear stage driven by a motor in a preceding shifting step if it is determined in the engine stopping determining step that the engine stops.

Systems and methods are disclosed for adaptive regeneration systems for electric vehicles. In one embodiment, an example method may include determining, by an adaptive regeneration system, that an electric vehicle is decelerating, determining an output voltage of a power source at the electric vehicle, determining that a voltage potential of a battery system at the electric vehicle is greater than the output voltage, and causing the voltage potential of the battery system to be modified to a value equal to or less than the output voltage.

The invention discloses a brake pedal stroke calculation device and a brake pedal stroke calculation method. The brake pedal stroke calculation device comprises a brake pedal, a brake master cylinder, a brake signal switch, a pressure sensor and a pedal stroke analogue controller. The brake signal switch is used for detecting whether the brake pedal is stepped on or not and transmitting brake switch signals to the pedal stroke analogue controller, and the pressure sensor transmits acquired master cylinder pressure signals to the pedal stroke analogue controller. According to the brake switch signals and the master cylinder pressure signals, a pedal opening degree is calculated on the basis of a relational expression preset in the pedal stroke analogue controller. By the brake pedal stroke calculation device and the brake pedal stroke calculation method, adoption of pedal stroke sensors is avoided, and accordingly vehicle cost is effectively reduced.

An electric brake system includes a reservoir, a master cylinder including first and second hydraulic ports, a simulation device providing reaction force in response to foot force applied to a brake pedal, a hydraulic-pressure supply device, a hydraulic-pressure control unit, and an electronic control unit (ECU). The hydraulic-pressure supply device converts rotational force of a motor into rectilinear motion upon receiving an electric signal from the pedal displacement sensor, and moves a double-acting piston designed to perform reciprocating motion within a hydraulic cylinder. The double-acting piston moves in both directions to generate hydraulic pressure by pressing a first hydraulic chamber provided in one end thereof, and moves in another direction to generate hydraulic pressure by pressing a second hydraulic chamber provided in the other end thereof.

The invention discloses an electro-hydraulic servo brake system with multi-working modes. The electro-hydraulic servo brake system comprises a brake pedal, a manpower cylinder, an electro-hydraulic servo cylinder, a brake master cylinder, a liquid storage pot, a master cylinder pressure sensor, a hydraulic pressure control unit, a wheel cylinder, a motor, an electronic control unit and a brake pedal stroke sensor. The piston of the brake master cylinder is acted on through independence or overlaying of the electro-hydraulic servo cylinder and the manpower cylinder, and all or part of vehicle wheels are applied with brake. The electro-hydraulic servo brake system with the multi-working modes can work in an active brake mode, a line control mode and an assisted brake mode according to different brake requirements and has a backup manual braking function upon failure. The electro-hydraulic servo brake system has the advantages of the multi-working modes, the most suitable brake mode can be selected according to brake requirements in practical application, and high reliability and high failure protection capability are achieved.

A control device is provided for an electric vehicle that generates a braking force corresponding to an opening degree of an accelerator pedal to decelerate the electric vehicle. The control device for the electric vehicle includes a motor configured to generate a driving force or a regenerative braking force of the electric vehicle, a friction braking unit configured to generate a friction braking force, and a controller configured to control at least one of the motor and the friction braking unit corresponding to the opening degree of the accelerator pedal. The controller determines whether all of regenerative electric power generated by the motor is consumed in the electric vehicle when the motor is caused to perform a regenerative braking. The controller causes the motor to perform the regenerative braking when the regenerative electric power is determined to be consumed in the electric vehicle.

The invention discloses a mechanical-hydraulic compound energy recycling system based on a flywheel and an energy accumulator. The mechanical-hydraulic compound energy recycling system is composed of a transmission device and an energy storage device, and the energy storage device is connected to the transmission device; the flywheel is separated from the energy accumulator through a gear box, and when a vehicle brakes or slows down, a part of braking energy can be stored in the flywheel directly to serve as kinetic energy of the flywheel; compared with an existing compound energy storage system, energy transformation between mechanical energy, hydraulic energy and mechanical energy is omitted, and the use ratio of energy is improved undoubtedly; and when a large amount of energy needs to be stored, the flywheel has an advantage over the energy accumulator, the flywheel and the energy accumulator also can make contact with each other, and the energy accumulator can store energy for a long time. According to the mechanical-hydraulic compound energy recycling system, the flywheel can drive a hydraulic pump/motor to rotate through mechanical power transmissions such as bevel gears and clutches, the hydraulic pump/motor work as a hydraulic pump, then the kinetic energy of the flywheel is transformed to hydraulic energy to be stored in the energy accumulator, and therefore waste of energy is avoided.

The invention discloses an integrated uncoupling type electric power-assisted braking system applicable to regenerative braking, which aims at overcoming the problem of complex pedal uncoupling when in pedal feeling simulation and regenerative braking. The integrated uncoupling type electric power-assisted braking system comprises a braking pedal, an integrated electric power-assisted mechanism, a braking main cylinder, a liquid storage cylinder, a hydraulic system, four wheel cylinders and a liquid storage tank, wherein the integrated electric power-assisted mechanism comprises a braking pedal push rod and a braking push rod; a liquid-storage piston rod of the liquid storage cylinder is connected with a liquid-storage ball screw; the liquid storage cylinder is connected with a port A of a reversing valve of the hydraulic system; the braking pedal push rod is connected with the braking pedal; the braking push rod is connected with the braking main cylinder which is connected with the liquid storage tank; an oil port of a second chamber of the braking main cylinder is connected with a port P of a front-shaft isolating valve in the hydraulic system; an oil port of a first chamber of the braking main cylinder is connected with a port P of a rear-shaft isolating valve of the hydraulic system; a left-front-wheel pressure reducing valve and a right-front-wheel pressure reducing valve of the hydraulic system are connected with the wheel cylinders of two front wheels; and a right-rear-wheel pressure reducing valve and a left-rear-wheel pressure reducing valve of the hydraulic system are connected with the wheel cylinders of two rear wheels.

The invention provides a braking energy recycling method used for a light electric vehicle. The braking energy recycling method comprises the steps that the driving state parameters of the light electric vehicle are detected; and when the light electric vehicle is braked, different energy recycling strategies are executed according to the driving states of the light electric vehicle. The invention also discloses an energy recycling system (200). The energy recycling system (200) comprises an anti-lock controller (212) and an electronic control device (101') of a driving system. The anti-lock controller (212) sends the vehicle driving state parameters to the electronic control device (101'), and the electronic control device (101') controls the energy recycling system (200) to conduct braking energy recycling. The invention further discloses an electronic control device body (101). According to the braking energy recycling method, the energy recycling system (200) and the electronic control device body (101), the different energy recycling strategies can be set under the different driving states in the braking process of the light electric vehicle especially after an anti-lock system intervenes the control, so that most effective braking energy recycling is achieved in the braking process of the light electric vehicle, and meanwhile, the braking performance of the light electric vehicle is combined.

The present invention relates to a controller (27) for a braking system for a vehicle (10). The braking system has an independent generator (20, 22) on respective front and rear axles (16, 18). The controller (27) comprises an input (44) arranged to monitor a vehicle condition and an operating condition of the generators (20, 22). The controller (27) also comprises a processing means (46) arranged to determine a brake force distribution range between the front and rear axles (16, 18) based on the vehicle condition, and in response to a braking demand and the operating condition of the generators (20, 22), calculate a brake force distribution within the brake force distribution range. In addition, the controller (27) comprises an output (50) arranged to control the generators in accordance with the calculated brake force distribution.

A method for controlling braking force in a regenerative brake cooperation control system can maximally use regenerative braking force of a rear wheel simultaneously while improving vehicular braking stability by preventing the rear wheel from being locked earlier than a front wheel. The method includes controlling braking forces of the front wheel and the rear wheel by considering a distribution of total vehicular braking force including a coasting regenerative braking force in the regenerative brake cooperation control system in an eco-friendly vehicle which can perform regenerative braking in the rear wheel or both the front wheel and the rear wheel.

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The invention provides a brake system. The project of the system is to improve the practicability of the brake system comprising a regenerative brake device. The brake system is constructed as: a braking force generated by a hydraulic brake device is given to one of front wheel (10R) and rear wheel (10R), a braking force generated by an electric brake device is given to another one, a braking force generated by the regenerative brake device is given to any one of the wheels, and a braking force obtained by excluding the braking force generated by the hydraulic brake device from a required overall braking force required for the vehicle as a whole is controlled through controlling the electric brake device and the regenerative brake device, wherein the brake system is configured such that the hydraulic brake device gives the braking force when the required overall braking force exceeds a threshold. The brake system has good responsiveness, and the vehicle having the brake system has good energy efficiency.

A regenerative brake control device for an electric-powered vehicle includes a first regenerative braking force setting unit that is operated by a predetermined number of times so as to change a setting of the regenerative brake control device from a normal regeneration level to a predetermined regeneration level, and a second regenerative braking force setting unit that is operated by a number of times that is greater than the predetermined number of times so as to change the setting of the regenerative brake control device from the normal regeneration level to the predetermined regeneration level.

Systems and methods for a braking a vehicle. In one example, the braking system includes a friction braking system, a regenerative braking system, and an electronic processor. The electronic processor is communicatively coupled to the friction braking system and the regenerative braking system. The electronic processor is configured to receive a driver brake request and determine a brake failure state. The brake failure state indicates a brake failure. In response to determining the brake failure state, the electronic processor applies a braking force based on the driver brake request. The braking force includes a frictional braking force generated by the friction braking system and a regenerative braking force generated by the regenerative braking system.