The energy-storage method of braking a vehicle

 

(57) Abstract:

The invention relates to a controlled brake systems of vehicles to electric traction. To the motor and actuating mechanism of the vehicle is attached to the flywheel by means of the differential gear. The braking process is carried out in two stages. At the first stage rastormazivate the flywheel and give him some of the kinetic energy of the vehicle, the other part of energy Recuperat in the network, which transfer the electric motor in the generator mode. In the second stage, after stopping the motor it reversiruyut, reporting speed in the direction of rotation of the flywheel, and transferring energy from the motor vehicle to the flywheel to a complete stop the vehicle. This method is characterized by a maximum use of the kinetic energy of the vehicle in a controlled braking. 4 Il.

The invention relates to energy-storage technology and is designed for controlled brake systems of vehicles to electric traction.

There is a method of energy-storage of braking applied by the regenerative brake Weights the second planetary gearbox, connected to the small sun wheel with the engine, a planet carrier with the propeller shaft, and a large sun wheel and flywheel; is that when braking transmit the kinetic energy of the vehicle and the energy of the engine to the flywheel, which reduce the fuel supply to the engine, creating on its shaft braking torque, and the change gear ratio of the gearbox for matching the velocities of the elements of the differential mechanism; when overclocking, increase fuel supply, the change gear ratio of the gearbox for matching the velocities of the elements of the differential mechanism and transmit the energy from the flywheel and the engine on acceleration of the vehicle.

The disadvantage of this method is a step change gear ratio, which cause dynamic loads, and operation of the engine is in transient mode.

There is a method of energy-storage deceleration of the vehicle, taken as a prototype [application of Germany OS 3031232, 1982, MKI F 16 H 33/00], is that transferable or accumulate rotational energy is supplied through the shaft to the gear wheel of the differential gear, while the other gear wheel is connected via a second shaft with a rotating mass is RME oil pressure or extracts from the hydraulic accumulator of energy consumption, moreover, the electrical and hydraulic control determines how much energy the rotation is transmitted, stored or given.

The disadvantages of this method are: relatively low efficiency and the ability to apply only to machines equipped with hydraulic drive.

The invention is aimed at maximum utilization of the kinetic energy of the vehicle in a controlled braking, which is achieved due to the fact that when braking the vehicle accelerates the flywheel attached to the motor and actuating mechanism of the vehicle through a differential gear, adjust the torque generated by the motor; characterized in that the braking process of the vehicle is carried out in two stages: the first stage rastormazivate the flywheel and give him some of the kinetic energy of the vehicle, the other part of energy Recuperat in the network, which transfer the electric motor in the generator mode; in the second stage, after stopping the motor it reversiruyut, reporting speed in the direction of rotation of the flywheel, and transferring energy from the motor vehicle to the flywheel to a complete stop A Electromechanical transmission at the first stage of braking, in Fig.2 - speeds of the elements of the differential mechanism of the Electromechanical transmission at the second stage of braking.

The proposed method is energy-storage braking may be performed using the device shown in Fig.3.

The device consists of a system of controlled Electromechanical actuator, which consists of: four-quadrant control system 6 connected to the network; an electric motor 5; a differential gear 4 with the carrier 2, the small sun wheel 1, the large sun wheel 3; flywheel 7; reverser 8; wheels 9; brake elements 10, 11; tachogenerators 12, 13, 14.

To carry out the proposed energy-storage method of braking an electric motor 5 connected to the planet carrier 2 of the differential gear 4, the flywheel 7 with a large sun wheel 3, and a small sun wheel 1 with the leading wheels 9 of the vehicle.

Before beginning the first stage of braking, the electric motor 5 operates in motor mode (line 1-2 of Fig.4) and transmits torque through the differential gear 4, the reverse gear 8 to the drive wheels 9 of the vehicle. The shaft 15 of the flywheel 7 is braked by the brake 10 and the flywheel 7 does not rotate VM=0. The control system shall ulozhenie 2 in the engine and from position 2 to position 3 in generator mode (Fig.4). Thus, the first stage of the braking control system 6 after receiving a command for braking removes power from the motor 5 (point 2 in Fig.4), and then puts it in the generator mode, creating on its shaft braking torque MT(point 3 in Fig. 4). Simultaneously, the control system 6 sends a signal to the braking element 10, which restorative shaft 15 of the flywheel 7.

At the initial braking (Fig.1) the angular velocity of the electric motor corresponds to the linear speed of the carrier of Vd; the angular velocity of the flywheel corresponds to the linear velocity of the large sun wheel Vmthat in this initial moment is equal to zero; the angular velocity of the wheels of the vehicle corresponds to the initial linear velocity of the small sun wheel Vabout.

The energy of the TC comes with wheels 9 via the reverse gear 8 on the flywheel 7 by a large sun wheel 3 and is accumulated there, and with the help of led 2 is transmitted to the motor shaft 5, which converts it into electric and management system 6 transmits to the network. At the first stage of braking, the speed of the motor 5 is reduced to zero.

The first stage of braking continues until a complete stop velocity Vmp(Fig.1), and the speed of the small sun wheel 1 is reduced to Vop.

The second phase of the braking starts automatically when the control system 6 is supplied from the tachometer 12 is a signal to stop the engined= 0. At this point, the control system switches the electric motor 5 in the motor mode and changes the direction of its rotation to the opposite. The kinetic energy EaboutVehicle and motor Edtransmitted to the flywheel so that Em= Eabout+Fd. Thus, in the second stage of braking, the electric motor 5 operates in the area between the dots 4-5 in Fig.4 in the motor mode. The second phase of the braking continues until the complete stop of the vehicle Vo=0 (Fig 2). Thus, the flywheel 7 is accelerated to a velocity Vmtoand the motor 5 to the velocity Vd(point 5 in Fig.4). When the control system 6 receives from the Tacho-generator 14 a signal to stop CUo= 0, it sends a signal to the braking element 11, which slows the shaft 16 of the small sun wheel 1. The control system 6 removes power from the motor 5, and he during the whole period of Parking works in run-on mode (point 6 in Fig.4) together with the flywheel 7.

Atletica on a similar scheme in reverse order.

The way energy-storage deceleration of the vehicle, namely, that when braking the vehicle accelerates the flywheel attached to the motor and actuating mechanism of the vehicle through a differential gear, adjust the torque generated by the electric motor, characterized in that the braking process of the vehicle is carried out in two stages: the first stage rastormazivate the flywheel and give him some of the kinetic energy of the vehicle, the other part of energy Recuperat in the network, which transfer the electric motor in the generator mode; in the second stage, after stopping the motor it reversiruyut, reporting speed in the direction of rotation of the flywheel, and transferring energy from the motor vehicle to the flywheel to a complete stop the vehicle.

 

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