CN2871324Y - Electric braking anti-lock device of automobile - Google Patents
Electric braking anti-lock device of automobile Download PDFInfo
- Publication number
- CN2871324Y CN2871324Y CN 200620078525 CN200620078525U CN2871324Y CN 2871324 Y CN2871324 Y CN 2871324Y CN 200620078525 CN200620078525 CN 200620078525 CN 200620078525 U CN200620078525 U CN 200620078525U CN 2871324 Y CN2871324 Y CN 2871324Y
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- Prior art keywords
- air inlet
- valve
- wheel
- inlet valve
- comparator
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- Expired - Fee Related
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Abstract
The utility model provides an electronic vehicle braking anti-lock device, which comprises a wheel-speed sensor, a control unit and a modulator. A voltage signal produced by the deceleration sensor and the wheel-speed signal during vehicle braking are used as the original vehicle speed and input into a computer, which calculates ten times per second under a certain rule. Under the functions of the inertia deceleration meter, the output valve considered as the vehicle speed signal is used for calculating the longitudinal slip; then the vehicle speed signal and the wheel-speed signal are input into the comparing circuit, which outputs voltage for starting the modulator to modulate the pressure in the braking chamber and avoid the lock of the wheel. The utility model has the advantages of high accuracy of anti-lock, good performance and simple production compared with similar products.
Description
Technical field
The utility model relates to a kind of auto-safety mechanism, particularly relates to a kind of electronic type automotive anti-lock braking device.
Background technology
Automotive anti-lock braking is called for short antiblock device, and English is abbreviated as ABS, and up to now, the controller of one of several big parts in the ABS structure all estimates when calculating speed of a motor vehicle parameter, and there is very mistake in the slip rate that calculates with it.
The utility model content
The purpose of this utility model is to overcome the prior art deficiency, provides a kind of to speed of a motor vehicle design accuracy height, makes the better electronic type automotive anti-lock braking of braking effect device.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of electronic type automotive anti-lock braking device, comprise wheel speed sensors, controller and regulating control, wheel speed sensors comprises propons wheel speed sensors 8 and back axle wheel speed sensors 9, regulating control is preceding air inlet valve 6 and back air inlet valve 16 and front-seat air valve 7 and final vacuum valve 17, preceding air inlet valve 6 is connected on the brake piping of master brake cylinder 3 and preceding compressed air brake cylinder 4, back air inlet valve 16 is connected on the brake piping of master brake cylinder 3 and back compressed air brake cylinder 5, the centre of air inlet valve 6 and preceding compressed air brake cylinder 4 before front-seat air valve 7 is installed in, final vacuum valve 17 is installed in the centre of back air inlet valve 16 and back compressed air brake cylinder 5, described controller comprises that with 555 ICs be the shaping amplification circuit that core is formed, with the microcomputer is the computing system at center, in the bleeder circuit of inertia type deceleration/decel G and potential device W composition with comparator LM324 is the voltage comparator circuit at center, the wheel speed impulse singla is after the shaping amplification circuit shaping is amplified, the output of one road connects the input of microcomputer through A/D converter, another road output connects the in-phase input end of comparator LM324 through resistance R 1, another input end of microcomputer connects the deceleration/decel voltage signal through A/D converter, the output of microcomputer meets the potential device W1 of bleeder circuit through D/A converter, inertia deceleration/decel meter G connects potential device W sliding end, bleeder circuit output connects the inverting input of comparator LM324, air inlet valve 6 and back air inlet valve 16 before the mouth one tunnel of voltage comparator circuit connects, another road connects front-seat air valve 7 and final vacuum valve 17 through clock relay K2.
Described voltage comparator circuit comprises comparator LM324, and mouth 1 pin of comparator LM324 connects aerotron BG base stage through resistance R 2, aerotron BG collector connecting relay J and sustained diode 2.
The utility model compared with prior art has the following advantages: the utility model anti-lock precision height, performance are good, simpler than like product when making.
Description of drawings
Fig. 1 is the structural representation of the utility model electronic type abs controller.
Fig. 2 is the utility model electronic type ABS schematic layout pattern.
Fig. 3 is the brake wheel braking procedure figure of electronic type ABS control.
The specific embodiment
As depicted in figs. 1 and 2, the utility model comprises wheel speed sensors, controller and regulating control, wheel speed sensors comprises propons wheel speed sensors 8 and back axle wheel speed sensors 9, regulating control is preceding air inlet valve 6 and back air inlet valve 16 and front-seat air valve 7 and final vacuum valve 17, preceding air inlet valve 6 is connected on the brake piping of master brake cylinder 3 and preceding compressed air brake cylinder 4, back air inlet valve 16 is connected on the brake piping of master brake cylinder 3 and back compressed air brake cylinder 5, the centre of air inlet valve 6 and preceding compressed air brake cylinder 4 before front-seat air valve 7 is installed in, final vacuum valve 17 is installed in the centre of back air inlet valve 16 and back compressed air brake cylinder 5, master brake cylinder 3 is connected with air receiver 1 and air compressor 2 by the source of the gas passage, air-pressure gauge 10 is installed on the air receiver 1, described controller comprises that with 555 ICs be the shaping amplification circuit that core is formed, with the microcomputer is the computing system at center, in the bleeder circuit of inertia type deceleration/decel G and potential device W composition with comparator LM324 is the voltage comparator circuit at center, the wheel speed impulse singla is after the shaping amplification circuit shaping is amplified, the output of one road connects the input of microcomputer through A/D converter, another road output connects the in-phase input end of comparator LM324 through resistance R 1, another input end of microcomputer connects the deceleration/decel voltage signal through A/D converter, the output of microcomputer meets the potential device W1 of bleeder circuit through D/A converter, inertia deceleration/decel meter G connects potential device W sliding end, bleeder circuit output connects the inverting input of comparator LM324, air inlet valve 6 and back air inlet valve 16 before the mouth one tunnel of voltage comparator circuit connects, another road connects front-seat air valve 7 and final vacuum valve 17 through clock relay K2.Propons wheel speed sensors 8 and back axle wheel speed sensors 9 are induction: symbol V
Wheel, it produces the inductive impulse signal in running car; The deceleration/decel sensor: symbol is g, produces the deceleration/decel voltage signal in the process that automobile is braked, and maxim is 10.7 meter per seconds
2The time digital signal be 10.7V, maxim is 0 meter per second
2The time digital signal be 0V, be 10.7 by digital signal maxim behind the A/D converter, minimum value is 0.
As shown in Figure 1, described controller is partly formed by four altogether:
(1) be the impulse singla shaping amplification circuit that core is formed with 555 ICs, its function is the inductive impulse signal shaping that wheel speed sensors produces to be amplified become voltage signal, in the utility model, with the speed of a motor vehicle is the voltage signal that 160 kilometers/hour inductive impulse signals become 16V, is the voltage signal that 8 kilometers/hour inductive impulse signal becomes 0.8V with the speed of a motor vehicle.By behind the A/D converter being that the voltage signal of 16V converts 44.444 digital signal to, be that the voltage signal of 0.8V converts 2.222 digital signal to minimum value with maxim.1 pin ground connection of 555 ICs, its 2 pin connecting resistance R5, R7, capacitor C 1, resistance R 4 is connected with capacitor C 1, diode D1 and stabilivolt DW are attempted by between resistance R 4 and the capacitor C 1,3 pin of 555 ICs meet potential device W2, and capacitor C 4 connects potential device W2 sliding end, and its 5 pin connects capacitor C 2,6,7 pin connecting resistance R6 and capacitor C 3,4,8 pin power connection V
D
(2) with the microcomputer be the computing system at center, its function is under the effect of deceleration/decel g, along with the continuity of time, with V
WheelBecome V
CarCalculating, in Motor Vehicle Braking Procedure, when chaufeur is stepped on brake pedal, the disappearance brake pedal free stroke this in a flash, brake pedal free stroke K switch 1 closure, V
WheelImpulse singla amplifies the back output voltage signal by 555 shapings, O point in Fig. 1 is divided into two-way, it is leaded up to A/D converter and converts the input end of input microcomputer after the digital signal to, another road connects in-phase input end 3 pin of comparator LM324 through resistance R 1, at this moment the voltage signal that produces of deceleration/decel sensor connects the input end of microcomputer after the A/D converter conversion at one time, when microcomputer is received V
WheelBehind two signals of g, begin to carry out the computing of per second 50 times, each shared time is 0.02 second.Because deceleration/decel g * time t=speed, 0.02g subtracted the speed of a motor vehicle down when deceleration/decel was for g when last at 0.02 second so, owing to this instantaneous V
WheelEquate with the speed of a motor vehicle, so just at this moment V
WheelAs the original instant speed of a motor vehicle of this glancing impact, symbol is V
Car, V just
Car=V
Wheel, because at this moment automobile does not produce deceleration/decel, slip rate is 0, so V
CarThe difference of-0.02g is made as C1, draws equation V
Car-0.02g=C1, the implication of this equation is that automobile is V at the original initial velocity of glancing impact
Car, deceleration/decel be g at 0.02 second the automobile speed when last, this is the computing first that microcomputer is done.Then microcomputer is made two-way with operation result C1 branch, one the tunnel goes mouth that C1 is carried out D/A converts voltage signal 2 pin end of oppisite phase to comparator LM324 after potential device W1 dividing potential drop to, the relevant register of microcomputer " is returned " on another road again, as the input value of computing next time, the pattern of each computing is not always the case.Be that computing formula is as follows:
Work as C
X+1Value be equal to or less than at 2.222 o'clock as the last output valve of microcomputer computing, it no longer becomes microcomputer and carries out C
X+2The input value of inferior computing, microcomputer quits work.
Microcomputer is by the computing of per second 50 times, and deceleration/decel g begins to rise by 0, and the adhesion value during according to braking force between tire and the road different are carried out different increases, and As time goes on, vehicle deceleration reaches maximum back and just no longer increases.Again As time goes on, after vehicle produces deceleration/decel, the original instant vehicle velocity V of automobile
CarAfter the microcomputer computing, become C successively
1, C
2, C
3C
x, and one of a ratio is little, that is to say that 50 instant speed of a motor vehicle of automobile appear in per second, and its descending variation is exactly the variation of automobile speed.Generally speaking, the computation process of microcomputer be the original instantaneous velocity of automobile under the effect of deceleration/decel g, with 50 computings of per second, become the process that the speed of a motor vehicle in the braking procedure descends, high-precision like this computing is given and is calculated the ABS slip rate requisite data are provided.
(3) bleeder circuit of forming in inertia type deceleration/decel G and potential device W.Different according to the height of adhesion value between tire and road at glancing impact, the force of inertia that inertia type deceleration/decel meter G produces varies in size, and the distance that moves forward varies, and it is big to move forward distance when adhesion value is high, and it drives potential device W
1, with the voltage signal V through the D/A conversion of microcomputer output
CarDividing potential drop is 0.85V
Car, when adhesion value is low, move forward apart from little, with V
CarDividing potential drop is 0.75V
Car
(4) with comparator LM324 be the voltage comparator circuit at center, the input of the 2 pin end of oppisite phase of comparator LM324 be microcomputer output convert voltage signal to through D/A converter, drive potential device W through inertia deceleration/decel meter G again
1(0.75～0.85) V after the dividing potential drop
Car, (0.75～0.85) V
CarBe the numerical value when automobile brake.Here mandatory declaration, why the input voltage of the 2 pin end of oppisite phase of voltage comparator LM324 needs (0.75～0.85) V
CarReason, according to formula slip rate S=(V
Car-V
Wheel)/V
CarOptimal slip rate when the peak adhesion coefficient appears in face is 15%～25%, optimal slip rate ratio because of high adhesion value road surface glancing impact is low at the optimal slip rate of low adhesion value road surface glancing impact again, so the optimal slip rate at high adhesion value road surface glancing impact is 15%, be 25% at the optimal slip rate that hangs down adhesion value road surface glancing impact.According to (V
Car-V
Wheel)/V
Car=15%～25%, can draw V
Wheel=(0.75～0.85) V
Car, in other words, the V of peak adhesion coefficient appears at high adhesion value road surface glancing impact
Wheel=0.85V
Car, hanging down the V that the peak adhesion coefficient appears in adhesion value road surface glancing impact
Wheel=0.75V
CarThe character of comparator LM324 is: when 3 pin in-phase end voltages are higher than the voltage of 2 pin backward ends, comparator LM324 does not work, but when in a single day backward end voltage be higher than in-phase end voltage, comparator LM324 overturns at once, at 1 pin output supply voltage, base stage through resistance R 2 to aerotron BG2, the power line voltage loop of turn-on relay J, changeover contact, the normally closed contact of relay J disconnects, and signal lamp LED extinguishes, another closing of contact, make the regulating control among Fig. 2 obtain power line voltage, regulating control work, sustained diode 2 is in parallel with relay J.
Regulating control is a two-position two-way solenoid valve, and air inlet valve is open in usual, and blow off valve is a normally closed.Preceding air inlet valve 6 is connected on the brake piping of master brake cylinder 3 and preceding compressed air brake cylinder 4, back air inlet valve 16 is connected on the brake piping of master brake cylinder 3 and back compressed air brake cylinder 5, the centre of air inlet valve 6 and preceding compressed air brake cylinder 4 before front-seat air valve 7 is installed in, final vacuum valve 17 is installed in the centre of back air inlet valve 16 and back compressed air brake cylinder 5, when the voltage comparator LM324 in the controller overturns, relay J is started working, normally closed contact disconnects, signal lamp LED extinguishes, another closing of contact makes the air inlet valve of same vehicle bridge and blow off valve obtain power line voltage, often drives air valve into and becomes and close, normally closed exhaust valve opening, compressed air brake cylinder pressure carries out the adjusting of pressure decay.When pressure dropped to a certain degree, the timer K that is in series with blow off valve started working, and timing one arrives, and blow off valve interrupts closing because of voltage source, and at this moment air inlet valve is still being closed, and compressed air brake cylinder pressure enters pressure maintenance phase.The length of timing should be 30～40ms when blow off valve deflation hole aperture is enough big, the hydraulic braking required time is about 20ms, and timing is adjustable, is as the criterion so that stopping distance is the shortest.
As shown in Figure 3, the level and smooth electric wire V in top among the figure
Car(voltage of output during microcomputer work) is glancing impact speed of a motor vehicle drop-down curve; Among the figure at V
CarBelow with V
CarThe heavy line that parallels is (0.75～0.85) V
CarDividing potential drop obtains curve, this curve inertia type decelerometer G drive potential device W1 in Fig. 1 produces deceleration/decel in braking procedure after; Among the figure with (0.75～0.85) V
CarThe very big curve of fluctuation up and down of curve intersection fork is V
WheelThe change of voltage curve, the each point on this curve can show the wheel slip at each instantaneous time of glancing impact; Among the figure the below be brake repair room pressure history: t
1Time is that braking initial stage ABS does not work, wheel slip (was V before not reaching optimum
WheelThe A point was in the past on the curve) compressed air brake cylinder pressure build up time; t
2Time is that wheel slip has reached optimum, and controller makes air inlet valve cut out the two folded compressed air brake cylinder pressure pressure hold time of short duration of opening of exhaust valve opening; (be V
WheelOn the curve between A and the B); t
3Be that controller makes air inlet valve continuation energising cut out fully, blow off valve continues the energising complete opening, and the compressed air brake cylinder pressure decay time, it (is V that the time of exhaust valve opening aligns with adjustable clock relay K2
WheelBetween curve B, the G); t
4Time is that air inlet valve continuation energising is closed, and blow off valve cuts off the power supply under the effect of clock relay K2 and closes compressed air brake cylinder pressure maintenance phase (V
WheelOn the curve between G, the C); t
5Time is after pressure maintenance phase finishes, the air inlet valve outage begins to open but also in the crack or half-open stage, because the pressure of compressed air brake cylinder at this moment is very low, it is crack to add upper inlet valve, compressed air brake cylinder pressure rises very not obvious, near the pressure hold mode (V of short time
WheelOn the curve between C, the D); t
6Time is complete opening after the air inlet valve outage, and brake chamber pressure is build up time (V again
WheelOn the curve between D, the E); t
7, t
8, t
9Repeat last pump circulation again.All being in (0.75～0.85) V
CarV above the curve
WheelEach point on the curve is the stable region of brake wheel state of kinematic motion; Following V
WheelEach point on the curve is the non-voltage stabilizing district of brake wheel state of kinematic motion.
The working process of the utility model ABS, with the compressed air brake is example: after chaufeur need be braked push down on the pedal, in brake pedal free stroke, brake pedal free stroke switch 1 closure among Fig. 1, the shaping amplification circuit, microcomputer, LM342 comparator, aerotron BG and the deceleration/decel sensor that with IC555 are the center obtain power line voltage respectively, and IC555 obtains V
WheelThe inductive impulse signal is divided into two-way at the O point after shaping is amplified, it is leaded up to A/D converter and converts the input end of input microcomputer after the digital signal to, another road connects in-phase input end 3 pin of comparator LM324 through resistance R 1, at this moment the voltage signal that produces of deceleration/decel sensor connects the input end of microcomputer after the A/D converter conversion at one time, when microcomputer obtains V simultaneously
WheelBehind two signals of g, use V
WheelAs the original instant speed of a motor vehicle of this this braking, carry out computing with the speed of per second 50 times.Even last microcomputer per second has been exported 50 automobile speed of a motor vehicle, this signal converts the 2 pin end of oppisite phase that voltage signal enters comparator LM324 to by D/A, and through potential device W1, along with the passing of braking time, the microcomputer output valve reduces gradually.Adhesion value during along with automobile brake between tire and the road different make inertia type deceleration/decel meter G drive potential device W1, to the V of microcomputer output
CarCarry out dividing potential drop.When deceleration/decel g was little, inertia type deceleration/decel meter G displacement forward was little, and after the potential device W1 dividing potential drop that it drove, the voltage that makes the acquisition of LM324 end of oppisite phase is well below in-phase end, and comparator LM324 does not work.Growth along with braking force, what inertia type deceleration/decel meter G moved forward increases gradually apart from height, after increasing to a certain degree, no longer increase, comparator LM324 end of oppisite phase voltage is increased to a certain degree gradually no longer increases, comparator LM324 end of oppisite phase voltage this moment (so that braking is an example on the highest adhesion value road surface) maxim is 085V
Car, simultaneously because the growth of braking force makes V
WheelDescend rapidly.See Fig. 3 again, because 0.85V
CarIt is slow to descend, V
WheelDescend rapidly, make greater than 0.85V
CarV
WheelRapidly to 0.85V
CarClose, at this moment ABS is operated in the T1 time, works as 0.85V
CarCurve and V
WheelIntersect at the A point, just 0.85V
Car=V
Wheel, 0.85V after short moment
CarLess than V
WheelThe brake wheel state of kinematic motion enters unstable region by the stable region, just the 3 pin in-phase end voltages of comparator LM324 are lower than 2 pin end of oppisite phase voltages in Fig. 1, at this moment comparator LM324 overturns at once, at its 1 pin output supply voltage, through the base stage turn-on relay J of resistance R 2 to aerotron BG, its normally closed contact is separated, signal lamp LED extinguishes, another closing of contact, after the air inlet valve of same vehicle bridge and blow off valve obtained power line voltage, the moment of, blow off valve little pass crack at air inlet valve, ABS was operated in the t among Fig. 3
2Time-inlet valve hole and air release valve hole are folded expected time of arrival and departure (between A, B).Obtain the moment of power line voltage when blow off valve, begin with the adjustable timing of its series connected adjustable clock relay K2, air inlet valve is closed fully, the blow off valve complete opening, the compressed air brake cylinder pressure decay is in Fig. 1 under the effect of clock relay K2, when timing one arrives, exhaust valve closure, the compressed air brake cylinder pressure decay finishes, and ABS is operated in t
3Time (between the B among Fig. 3, the G).Because the inlet and outlet valve is all cutting out, compressed air brake cylinder pressure enters pressure maintenance phase, and ABS is operated in the t among Fig. 3
4Time (between G, the C), because compressed air brake cylinder pressure is very low, make V in this stage
WheelBecome ascendant trend by original downswing, because 0.85V
CarStill descend V gently
WheelFast rise after to a certain degree, occurs 0.85V again
Car=V
Wheel, i.e. 0.85V
CarWith V
WheelIntersect at the C point, at this moment certain acceleration has appearred in brake wheel, and the brake wheel state of kinematic motion finishes (between G, the C), V at unstable region
WheelC point back V continues to rise
WheelGreater than 0.85V
CarAt this moment the voltage comparator LM324 among Fig. 1 stops upset, the base signal of aerotron BG interrupts, the relay J contact returns to normal again, the normally closed contact closure, signal lamp LED ignites, and the inlet and outlet valve has interrupted power line voltage simultaneously, the timing circuit zero clearing of clock relay K2, from the beginning timing next time calculates.Air inlet valve among Fig. 2 begins to open, to V
WheelRun to the D point among Fig. 3, because air inlet valve by crack change standard-sized sheet, adds that compressed air brake cylinder pressure was very low originally, so the rising of compressed air brake cylinder pressure is very little between C, D, so also should think pressure hold time during this period of time, promptly ABS is operated in t
5Time (between C, the D), so far, the compressed air brake cylinder pressure maintenance phase finishes.And be the t that brake chamber pressure rises
6Time.T afterwards
7, t
8, t
9Time repeat previous circulation again.Along with making the digital signal of microcomputer output, the continuity of pump circulation one by one reduces again and again, when microcomputer output digital signal less than 2.222 the time, by the voltage signal after the D/A conversion during less than 0.8V, microcomputer stops computing, ABS quits work, at this moment the speed of a motor vehicle is per hour 8 kilometers, and locking phenomenon appears in wheel.
The above is a highest adhesion value road surface glancing impact, 15% the slip rate that ABS carries out.If at minimum adhesion value road surface glancing impact, the potential device W1 among inertia type deceleration/decel meter G drive Fig. 1 is V
CarDividing potential drop is 0.75V
Car, ABS carries out is 25% slip rate.The all processes of the brake wheel work of the utility model electronic type ABS control that Here it is.
The hydraulic braking automobile can use this pattern fully.
Claims (2)
1, a kind of electronic type automotive anti-lock braking device, comprise wheel speed sensors, controller and regulating control, wheel speed sensors comprises propons wheel speed sensors (8) and back axle wheel speed sensors (9), regulating control is preceding air inlet valve (6) and back air inlet valve (16) and front-seat air valve (7) and final vacuum valve (17), preceding air inlet valve (6) is connected on the brake piping of master brake cylinder (3) and preceding compressed air brake cylinder (4), back air inlet valve (16) is connected on the brake piping of master brake cylinder (3) and back compressed air brake cylinder (5), front-seat air valve (7) is installed in the centre of preceding air inlet valve (6) and preceding compressed air brake cylinder (4), final vacuum valve (17) is installed in the centre of back air inlet valve (16) and back compressed air brake cylinder (5), it is characterized in that: described controller comprises that with 555 ICs be the shaping amplification circuit that core is formed, with the microcomputer is the computing system at center, in the bleeder circuit of inertia type deceleration/decel G and potential device W composition with comparator LM324 is the voltage comparator circuit at center, the wheel speed impulse singla is after the shaping amplification circuit shaping is amplified, the output of one road connects the input of microcomputer through A/D converter, another road output connects the in-phase input end of comparator LM324 through resistance R 1, another input end of microcomputer connects the deceleration/decel voltage signal through A/D converter, the output of microcomputer meets the potential device W1 of bleeder circuit through D/A converter, inertia deceleration/decel meter G connects potential device W sliding end, bleeder circuit output connects the inverting input of comparator LM324, the mouth one tunnel of voltage comparator circuit connects preceding air inlet valve (6) and back air inlet valve (16), and another road connects front-seat air valve (7) and final vacuum valve (17) through clock relay K2.
2, electronic type automotive anti-lock braking device according to claim 1, it is characterized in that: described voltage comparator circuit comprises comparator LM324, mouth 1 pin of comparator LM324 connects aerotron BG base stage through resistance R 2, aerotron BG collector connecting relay J and sustained diode 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620078525 CN2871324Y (en) | 2006-03-06 | 2006-03-06 | Electric braking anti-lock device of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620078525 CN2871324Y (en) | 2006-03-06 | 2006-03-06 | Electric braking anti-lock device of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2871324Y true CN2871324Y (en) | 2007-02-21 |
Family
ID=37739671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620078525 Expired - Fee Related CN2871324Y (en) | 2006-03-06 | 2006-03-06 | Electric braking anti-lock device of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2871324Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774366A (en) * | 2012-07-23 | 2012-11-14 | 广州市科密汽车制动技术开发有限公司 | Integrated ABS (anti-lock brake system) vehicle brake energy recovery system and method |
-
2006
- 2006-03-06 CN CN 200620078525 patent/CN2871324Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774366A (en) * | 2012-07-23 | 2012-11-14 | 广州市科密汽车制动技术开发有限公司 | Integrated ABS (anti-lock brake system) vehicle brake energy recovery system and method |
| CN102774366B (en) * | 2012-07-23 | 2014-12-24 | 广州科密汽车电子控制技术股份有限公司 | Integrated ABS (anti-lock brake system) vehicle brake energy recovery system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070221 Termination date: 20100306 |