CN210363759U - Emergency braking energy recovery device based on gas type energy accumulator - Google Patents
Emergency braking energy recovery device based on gas type energy accumulator Download PDFInfo
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- CN210363759U CN210363759U CN201921311594.2U CN201921311594U CN210363759U CN 210363759 U CN210363759 U CN 210363759U CN 201921311594 U CN201921311594 U CN 201921311594U CN 210363759 U CN210363759 U CN 210363759U
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Abstract
An emergency braking energy recovery device based on a gas type energy accumulator belongs to the technical field of vehicle energy conservation, and comprises a drive axle, a wheel angular acceleration sensor, a central processing unit, a generator, a mechanical transmission device, a super capacitor C, a variable pump/motor M2 and the gas type energy accumulator, wherein the drive axle is respectively connected with the mechanical transmission device and the wheel angular acceleration sensor; the output shaft of the mechanical transmission device is connected with the input shaft of the generator; the super capacitor C is connected with a magnetic induction circuit in the generator through a circuit; the electric machine of the variable pump/motor M2 is arranged in a magnetic induction loop of the generator; the wheel angular acceleration sensor is connected with the signal input end of the central processing unit, and the signal output end of the central processing unit is connected with the generator. The utility model discloses can retrieve the energy that produces in the emergency braking short time rapidly, the good reliability, reaction rate is fast, can react the emergency braking of vehicle fast, has avoided the energy waste that the recovery unit reaction untimely caused.
Description
Technical Field
The utility model belongs to the technical field of the vehicle is energy-conserving, especially involve a device and control method that can retrieve the energy that consumes in the emergency braking process.
Background
With the development of economy, the world is faced with the problems of too fast energy consumption and increasingly severe environment, wherein the energy consumption for automobile driving is larger and the proportion is continuously improved. According to the department of energy, new vehicles will consume more than 70% of the annual new oil production each year.
The current new technology in the automobile field, namely an automatic emergency braking system, is used for avoiding an emergency collision accident, and is an emerging technology with high prospect. The automatic emergency braking system refers to that a vehicle normally runs under the condition of non-adaptive cruising, for example, when the vehicle meets an emergency dangerous condition or the distance between a front vehicle and a pedestrian is less than a safe distance, the vehicle actively brakes (but the vehicle with the function cannot completely brake the vehicle), so that collision accidents such as rear-end collision and the like are avoided or reduced. At present, the automatic emergency brake is already applied to some automobiles, such as Honda, Mazda and the like, and has great practical value. However, the emergency braking requires very high energy to maintain the high pressure of the brake fluid, and a large amount of braking energy is consumed during the braking process, thereby causing a great waste of energy.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the emergency braking energy recovery device based on the gas type energy accumulator can rapidly recover energy generated in the short time of emergency braking, is high in reliability and fast in reaction speed, can rapidly react to the emergency braking of a vehicle, and avoids energy waste caused by the fact that the recovery device does not react timely.
Emergency braking energy recovery unit based on gaseous formula energy storage ware, characterized by: the system comprises a drive axle, a wheel angular acceleration sensor, a central processing unit, a generator, a mechanical transmission device, a super capacitor C, a variable pump/motor M2 and a gas accumulator, wherein the drive axle is respectively connected with the mechanical transmission device and the wheel angular acceleration sensor; an output shaft of the mechanical transmission device is connected with an input shaft of the generator; the super capacitor C is connected with a magnetic induction circuit in the generator through a circuit; the electric machine of the variable pump/motor M2 is arranged in a magnetic induction loop of the generator; the gas accumulator is connected with a variable pump/motor M2; the wheel angular acceleration sensor is connected with a signal input end of the central processing unit, and a signal output end of the central processing unit controls the magnetic induction circuit switch K.
The gas type energy accumulator is an air bag type energy accumulator.
The CPU is a four-core 64-bit CPU of high-pass CellON 820A.
Through the above design scheme, the utility model discloses following beneficial effect can be brought: the emergency braking energy recovery device based on the gas type energy accumulator can rapidly recover energy generated in the short time of emergency braking, has strong reliability and high reaction speed, can rapidly react the emergency braking of a vehicle, and avoids energy waste caused by untimely reaction of the recovery device.
Further, the utility model discloses the device design does not rely on accurate mathematical formula, compares with the electricity energy storage, and its stored energy is big, compares with flywheel and hydraulic pressure energy storage, and the electric energy that produces when can retrieving emergency braking fast, simple structure, convenient installation are on various cars, and the suitability is strong.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is a schematic block diagram of the structure of the emergency braking energy recovery device based on the gas type energy accumulator.
Fig. 2 is a circuit diagram of the magnetic induction loop of the generator of the emergency braking energy recovery device based on the gas type energy accumulator.
Fig. 3 is a schematic structural view of the gas accumulator of the emergency braking energy recovery device based on the gas accumulator of the present invention.
Fig. 4 is the structure schematic diagram of the compressed gas accumulator of the emergency braking energy recovery device based on the gas accumulator of the present invention.
Fig. 5 is an energy conversion circuit diagram of the braking process of the gas accumulator of the emergency braking energy recovery device based on the gas accumulator of the present invention.
In the figure, 1-a drive axle, 2-a wheel angular acceleration sensor, 3-a central processing unit, 4-a generator, 5-a mechanical transmission device, 6-a super capacitor C, 7-a variable pump/motor M2, 8-a gas accumulator, 9-a flexible rubber air bag, 10-a valve, 11-gas, 12-oil and 13-fluid ports.
Detailed Description
An emergency braking energy recovery device based on a gas type energy accumulator is shown in fig. 1 and 5, and comprises a drive axle 1, a wheel angular acceleration sensor 2, a central processing unit 3, a generator 4, a mechanical transmission device 5, a super capacitor C6, a variable pump/motor M27 and a gas type energy accumulator 8, wherein the drive axle 1 has the kinetic energy of wheels, is connected with the wheel angular acceleration sensor 2 and the mechanical transmission device 5, and converts the kinetic energy of an automobile during braking into mechanical energy; an output shaft of the mechanical transmission device 5 is connected with an input shaft of the generator 4 to convert mechanical energy into electric energy; the super capacitor C6 is connected with a magnetic induction circuit in the generator 4 through a circuit to realize electric energy storage; the variable pump/motor M27 is used for realizing the interconversion between mechanical energy and internal energy, the motor of the variable pump/motor M27 is arranged in a magnetic induction loop of the generator 4, and magnetic induction electromotive force generated during emergency braking drives the pump to rotate so as to realize the rotation of the pump; the gas type energy accumulator 8 is connected with a variable pump/motor M27 to realize rapid energy accumulation; the wheel angular acceleration sensor 2 is connected with a signal input end of the central processing unit 3, and a signal output end of the central processing unit 3 controls the magnetic induction circuit switch K.
The central processing unit 3 adopts a four-core 64-bit central processing unit with a high-pass cellcell 820A, the architecture, the dominant frequency and the 64-bit digit of the processor are superior to those of other vehicle central processing units, and the performance is better.
The magnetic induction circuit of the generator is shown in fig. 2, in the figure, M1 is a motor, E represents induced electromotive force, I is induced current, R1 is an equivalent resistor of a current feedback circuit, R2 is a braking current-limiting resistor, R3 is an internal resistance of a motor armature, and D is a diode. The rightmost circuit sends out a magnetic field to the motor, when the automobile normally runs, a switch K in the figure 2 is closed, and the conducting circuit is a closed loop circuit on the left side at the moment; when the automobile is emergently braked, the wheel angular velocity sensor sends a signal to the central processing unit 3, the central processing unit 3 controls the switch K again to disconnect the K, and the conducting circuit is the whole large closed-loop circuit at the moment. Because the motor is a magnetic induction element, there is the magnetic induction formula:
where L is the inductance of the motor armature.
When switch K is closed, when the vehicle is not braked promptly, the magnetic induction current is:
when the switch K is turned off, i.e. when the vehicle starts to brake suddenly,
rapidly increases the induced electromotive force, when E>And U, starting to charge the system.
The gas accumulator 8 is a gas cell accumulator, which operates according to the boire gas law, as shown in fig. 3 and 4. Consists of an inert gas part in the capsule and a fluid part outside the capsule, and the middle parts of the inert gas part and the fluid part are separated by a flexible rubber air bag 9. The flexible rubber bladder 9 acts as an air barrier and is capable of changing shape and size. The liquid around the air bag hydraulic oil is connected with an external hydraulic circuit. The accumulator is charged with nitrogen through a top valve 10. When the pump is started, the accumulator will be pre-charged to the nominal pressure. The poppet valve is normally held open by spring pressure, preventing the bladder from being expelled from the fluid port 13. When the hydraulic pressure of the accumulator is higher than the pressure inside the accumulator, the gas 11 will compress, storing energy in the compressed gas 11 and a reserve amount of oil 12 around the gas bag (the structure of the gas bag accumulator and the process of compressing the gas is shown in fig. 3). The compressed gas forces oil out of the accumulator when the hydraulic pressure outside the accumulator is lower than the pressure inside the accumulator and consumes gas as the oil 12 flows out until the pressure inside the accumulator and the pressure outside the accumulator are equal, thereby releasing energy. Because the gas volume changes very fast under the pressure effect of high pressure hydraulic oil, can realize the energy storage fast. When the vehicle needs energy, the energy accumulator releases the energy, drives the motor to work, and converts the energy into needed components.
The control method of the emergency braking energy recovery device based on the gas accumulator comprises the following steps which are sequentially carried out,
step one, emergency braking of the automobile is carried out, the angular acceleration of wheels is reduced, and angular acceleration information is recorded by a wheel angular acceleration sensor 2 and is transmitted to a central processing unit 3;
step two, the central processing unit 3 judges the emergency braking state according to the preset angular acceleration threshold value, the actual angular acceleration exceeds the threshold value, the central processing unit 3 sends an emergency braking instruction, a switch K in a magnetic induction circuit of the generator 4 is disconnected, the whole passage is closed, the current of a loop is changed, and the variable pump/motor M27 rotates in an accelerating way to drive the gas type energy accumulator 8 to store energy;
when the actual angular acceleration is lower than the threshold value, the central processing unit 3 does not send out an emergency braking instruction, the switch K in the magnetic induction circuit of the generator 4 is kept closed, and the gas type energy accumulator 8 does not store energy.
Wherein in the second step, the angular acceleration threshold can be selected from an automobile with the outer diameter of 70cm, and the angular acceleration of the wheel is less than or equal to-20 rad/s2The automobile is considered to be braked emergently.
The utility model discloses an advantage of gasbag formula energy storage ware lies in, and the reaction is sensitive, can retrieve the huge energy of emergency braking transmission in the twinkling of an eye fast, and the biggest volume of gasbag is great, can hold more gas to save more internal energy.
The combination of the generator 4 and the supercapacitor C6 has the advantage of being responsive and of being able to recover quickly part of the energy generated by emergency braking.
When the automobile needs to be powered, the super capacitor C6 discharges electric energy to realize power supply.
The above-mentioned embodiment is only the technical scheme and thinking of the utility model, its aim at make the professional can understand fast the utility model discloses a content and according to in order to implement, nevertheless can not restrict with this the utility model discloses a protection scope. Rather, equivalent variations and modifications made according to the spirit of the present invention are intended to be covered by the scope of the present invention.
Claims (3)
1. Emergency braking energy recovery unit based on gaseous formula energy storage ware, characterized by: the device comprises a drive axle (1), a wheel angular acceleration sensor (2), a central processing unit (3), a generator (4), a mechanical transmission device (5), a super capacitor C (6), a variable pump/motor M2(7) and a gas type energy accumulator (8), wherein the drive axle (1) is respectively connected with the mechanical transmission device (5) and the wheel angular acceleration sensor (2); the output shaft of the mechanical transmission device (5) is connected with the input shaft of the generator (4); the super capacitor C (6) is connected with a magnetic induction circuit in the generator (4) through a circuit; the electric machine of the variable pump/motor M2(7) is arranged in a magnetic induction loop of the generator (4); the gas accumulator (8) is connected with a variable pump/motor M2 (7); the wheel angular acceleration sensor (2) is connected with a signal input end of the central processing unit (3), and a signal output end of the central processing unit (3) controls the magnetic induction circuit switch K.
2. The emergency braking energy recovery device based on a gas accumulator of claim 1, wherein: the gas type energy accumulator (8) is an air bag type energy accumulator.
3. The emergency braking energy recovery device based on a gas accumulator of claim 1, wherein: the central processing unit (3) is a four-core 64-bit central processing unit with a high-pass cellcell 820A.
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| CN201921311594.2U CN210363759U (en) | 2019-08-14 | 2019-08-14 | Emergency braking energy recovery device based on gas type energy accumulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110329224A (en) * | 2019-08-14 | 2019-10-15 | 吉林大学 | Emergency braking energy recycle device and control method based on gas type accumulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110329224A (en) * | 2019-08-14 | 2019-10-15 | 吉林大学 | Emergency braking energy recycle device and control method based on gas type accumulator |
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