44results about How to "Ensure braking stability" patented technology

Disclosed is a method for optimizing braking force distribution of an integrated braking system of a commercial vehicle according to working conditions. The method for optimizing braking force distribution of a front axle friction brake, a rear axle friction brake and an eddy current retarder is provided for the commercial vehicle equipped with an air pressure electric control braking system and the eddy current retarder, and the difference of the requirements of the emergency braking working condition, the long slope downhill braking working condition and other ordinary braking working conditions for the braking response speed, the braking distance, the brake temperature and the friction liner abrasion uniformity is taken into consideration, so that different control targets and different braking force distribution strategies are adopted according to different braking working conditions. The method has the advantages that the braking response speed of the braking system is increased, the temperature rise of the brakes under the downhill working condition is reduced, the service life of each friction liner is prolonged, accidents are avoided, the safety under various braking working conditions is improved, the service life of each friction brake and the service life of the eddy current retarder are prolonged, the maintenance frequency is reduced, and the economical performance is improved.

A method for determining an amount of regenerative braking includes: determining a possible amount of regenerative braking at a time of braking a vehicle; distributing a first amount of regenerative braking up to the possible amount of regenerative braking as the amount of regenerative braking; distributing a second amount of regenerative braking remaining from the possible amount of regenerative braking as an amount of hydraulic braking; and performing, first, regenerative braking by issuing a motor torque instruction according to the possible amount of regenerative braking and, second, friction braking using the amount of hydraulic braking.

The invention relates to a method for controlling braking force in a regenerative brake cooperation control system. The method 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 rearwheel 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.

The invention discloses a method for controlling an anti-lock system of a four-hub-motor drive electric car free of hydraulic braking, and relates to the field of automotive electronic control. In each control stage, braking force distribution of a front axle and a rear axle of a vehicle and reverse braking, regenerative braking, reverse-regenerative coordinating braking and forward driving of an in-wheel-motor are related. A logic threshold control method is adopted in ABS control, the slip rate (S) is compared with a set threshold value, the value and the direction of input voltage of the motor are controlled so that the forward driving, the reverse braking and the regenerative braking of the motor can be achieved, and accordingly wheel lock is prevented. The slip rate of a wheel is controlled near a theoretical value, the ground attachment coefficient is utilized to the maximum extent, and safe braking is achieved.

The invention relates to a suspension device for a large-gauge magnetic rail brake of a rail vehicle, which is installed between the magnetic rail brakes on both sides and the vehicle bogie. The suspension device includes a cylinder component, a connecting plate and a positioning component. The cylinder component is installed on each The front and rear ends of the upper surface of the side magnetic rail brake, the upper end of the cylinder is connected to the vehicle bogie, the cylinder consists of a cylinder body and an adapter assembly, the adapter assembly is installed at the upper and lower ends of the cylinder body, and the cylinder body is a single-acting spring cylinder. The transfer assembly is equipped with a matching structure of arc surface and curved surface; the connecting plate is installed horizontally between the magnetic track brakes arranged oppositely on both sides of the vehicle bogie, connecting the magnetic track brakes on both sides as a whole, and the upper and lower ends of the positioning composition are respectively connected with the connecting The plate is fixedly connected to the bottom surface of the vehicle bogie. It can ensure a large gap between the magnetic track brake and the track, and can quickly and reliably apply the magnetic track braking force to reduce the braking force loss rate.

The invention provides an electrical hydraulic brake mechanism. The electrical hydraulic brake mechanism comprises a piston rod, a fixed cover, a piston disc, a hydraulic pump, a centrifugal pump, a brake motor, a connecting shaft, an oil pressure tube head, a line bank, a fixed line bank, a limiting switch, a blocking base structure capable of ventilating, radiating, braking and buffering, a self-return type pressure relief pressure rod structure, a damping type fixed mounting frame structure and an intelligently-controlled dustproof operator structure. According to the electrical hydraulic brake mechanism provided by the invention, a ventilating fan, a braking blocking base, a jointing base, a heat-conduction blocking plate, a movable shaft and a buffer spring are arranged, so that braking and radiating are facilitated, and brake effect is guaranteed; the ventilating fan can radiate a brake assembly to be braked inside the braking blocking base; the heat-conduction blocking plate canperform radiating work; and through buffer action of the buffer spring, the heat-conduction blocking plate can movably operate inside the jointing base through the movable shaft, so that brake stability is guaranteed.

The invention discloses a new energy vehicle regenerative braking force distribution method and the new energy vehicle, and relates to the technical field of new energy vehicle braking. The method includes: determining the first braking strength limit according to the current braking capability of the motor, and determining the second braking strength limit according to the braking performance and braking stability; according to the braking strength and the first braking strength limit and the second The size relationship of the braking strength limit determines the regenerative braking force distribution strategy, and distributes the total braking force to the rear wheels as much as possible; divides the distributed total rear wheel braking force into the rear wheel friction braking force and the motor braking force. When the braking demand can be met, the total braking force of the rear wheel is distributed to the motor as much as possible, and when the motor cannot meet the braking demand, the frictional braking force of the rear wheel is used to compensate. Through this method, the total braking force can be distributed to the rear wheel braking force according to the maximum braking force that the motor can provide, so that the braking capacity of the motor can be fully utilized, and efficient braking energy recovery can be realized.

The invention discloses an electric-hydraulic composite braking system for an electric automobile and an optimization method of the electric-hydraulic composite braking system. The electric-hydraulic composite braking system for the electric automobile comprises a motor regeneration braking force module, a hydraulic braking force module and a composite braking force control module. The motor regeneration braking force module comprises two hub motors, a brake pedal position sensor, four wheel speed sensors, an automobile speed sensor, a super-capacitor, a two-quadrant DC-DC converter and a first ECU. The hydraulic braking force module comprises an oil pump motor, a hydraulic oil pump and a second ECU. In the traveling process of the automobile, through detection of the automobile speed and the wheel speed of automobile traveling and brake pedal position signals, the composite braking force control module controls the distribution ratio between the motor regeneration braking force module and the hydraulic braking force module. Meanwhile, through multi-objective optimization conducted on the electric-hydraulic composite braking system, the braking pedal feeling and motor recovered energy serve as objects, and under the ECE laws and regulations, the relatively high energy recovery rate and the proper brake pedal feeling are obtained.

The invention provides an energy-feedback active control type air braking system, relates to an air braking system of electric automobile energy feedback and belonging to the field of electric automobiles. The energy-feedback active control type air braking system comprises a high-air-pressure generation module, an active air pressure control module and an ABS (Anti-skid Brake System) module, wherein the high-air-pressure generation module is used for generating high-pressure air for the whole automobile under certain pressure; and the active air pressure control module comprises a pedal displacement sensor, a brake pedal, a brake valve, a brake controller, a front-axle double-control proportional relay valve and a rear-axle double-control proportional relay valve. The energy-feedback active control type air braking system is capable of realizing ideal distribution of a braking force and maximization of the rate of energy recovery. The energy-feedback active control type air braking system employs the double-control proportional relay valves to realize active real-time accurate distribution of the braking forces of a front axle and a rear axle, the braking motor of a driving shaft motor and the mechanical braking force; and simultaneously, the energy-feedback active control type air braking system is capable of guaranteeing braking security by starting the conventional braking manner when the electric control part of the double-control proportional relay valves becomes invalid. Furthermore, the energy-feedback active control type air braking system provided by the invention is applied to electric vehicles having the air braking system.

The invention discloses a dislocation balance structure of a tension wheel frame of a vacuum cleaner, which is installed at a coil reel, and comprises: a tension wheel frame bracket, which is rotatably connected to a rotating shaft of the coil coil, and a shaft body is arranged transversely on the tension wheel frame bracket , the two ends of which form the first connection part; the tensioner frame, which includes the first frame unit and the second frame unit arranged in a dislocation, and the two outer sides of the joint are provided with the second connection corresponding to the first connection part part, the tension wheel frame is connected to the tension wheel frame support through the first connection part and the second connection part, the free end of the first frame body unit is rotatably connected with the tension wheel, and the free end of the second frame body unit is used as the force application point . Compared with the prior art, the present invention does not need to guarantee the force application point at the center position of the tension wheel frame, but only needs to apply the force on the free end of the second frame unit, so it can effectively overcome the problems in the prior art. The phenomenon of tension wheel deviation caused by the deviation of the force point from the center.