CN104085390A - Automobile brake fluid deficiency alarm device and method thereof - Google Patents
Automobile brake fluid deficiency alarm device and method thereof Download PDFInfo
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- CN104085390A CN104085390A CN201310753783.6A CN201310753783A CN104085390A CN 104085390 A CN104085390 A CN 104085390A CN 201310753783 A CN201310753783 A CN 201310753783A CN 104085390 A CN104085390 A CN 104085390A
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Abstract
The invention discloses an automobile brake fluid deficiency alarm device and a method thereof. The automobile brake fluid deficiency alarm device comprises a main power supply, an ignition switch, a main relay, a brake fluid level sensor, an alarm indicator lamp, a voice alarm, a first relay, a temperature sensor, a second relay, a humidity sensor, a third relay, an ultrasonic level meter and a single chip microcomputer, wherein the ignition switch is connected with the main relay, the first relay, the second relay and the third relay respectively; the main relay is connected with the brake fluid level sensor; the first relay is connected with the temperature sensor; the second relay is connected with the humidity sensor; the third relay is connected with the ultrasonic level meter; the brake fluid level sensor, the temperature sensor, the humidity sensor and the ultrasonic level meter are all connected with the single chip microcomputer; the single chip microcomputer is connected with the alarm indicator lamp and the voice alarm. According to the automobile brake fluid deficiency alarm device and the method thereof, the brake fluid deficiency is comprehensively detected through different factors, and a driver is informed of taking corresponding measures according to different voice alerts, so that the brake fluid detection accuracy and the safety performance are improved.
Description
Technical field
The present invention relates to motor vehicle brake fluid correlative technology field, refer in particular to the not enough alarm device of a kind of motor vehicle brake fluid and method thereof.
Background technology
Braking liquid claims again brake solution, has three types.In the time choosing, will select failure-free producer, and rank is more high better.Its braking operation pressure is generally 2MPa, the high 4～5MPa that reaches.All liq has incompressible characteristic, in the container of sealing or be full of in the pipeline of liquid, and in the time that liquid is under pressure, just can be soon, equably the various piece of pressure conduction liquid.Hydraulic braking utilizes this principle to carry out work.Braking liquid is the liquid medium that transmits brake-pressure in hydraulic braking system for automobile, uses in the vehicle of employing hydraulic brake system.Braking liquid is that brake system is braked indispensable part, and among brake system, it is the medium transmitting as a power, because liquid is can not be compressed, so can directly be passed among wheel cylinder by braking liquid from the pressure of master cylinder output.Due to the degree of reliability of its good and bad direct relation brake, therefore braking liquid choose the life security concerning automobile friend, never can adopt a casual attitude.
Present most of chaufeurs all do not have to check before driving whether braking liquid meets the custom of safety value, and occurrence frequency can be higher for new hand; And travel the in the situation that of braking liquid deficiency, can there is braking failure and cause traffic accident.Vehicle is all equipped with braking liquid level sensor on master brake cylinder now, in the time that braking liquid is not enough, and switch connection, thus in instrument, show braking during standstill warning banner, in order to remind chaufeur.For the new hand of the bad chaufeur of driving habit and driving experience deficiency, all, less than the custom that checks that before driving whether braking liquid is not enough, therefore cannot play warning function.
Chinese patent Granted publication number: CN202485756U, October 10 2012 Granted publication day, the not enough warning of a kind of brake-fluid level is disclosed, it comprises contact point arm, coil, horn switch, storage battery, upper contact, base, lower contact and contact frame, described base is provided with contact frame and contact point arm, contact frame is provided with lower contact, contact point arm is provided with the upper contact corresponding with lower contact, on described contact point arm, be also provided with the coil being connected with storage battery with horn switch, reduce the working current by horn switch by this electric horn breaker point unit, reduce loudspeaker pitting of contact fault rate, extend the service life of loudspeaker.The weak point of this utility model is, this system only just judges that by detecting the liquid level situation of braking liquid whether braking liquid is not enough, do not consider that the braking liquid that other factors affect specifically detects, can not well react braking liquid particular case, make vehicle safety have certain hidden danger.
Summary of the invention
There is above-mentioned deficiency in order to overcome in prior art in the present invention, a kind of whether not enough alarm device of motor vehicle brake fluid and the method thereof of Shortcomings of comparatively complete detection braking liquid is provided.
To achieve these goals, the present invention is by the following technical solutions:
Motor vehicle brake fluid deficiency alarm device, comprise general supply, ignition lock, main relay, braking liquid level sensor, warning indicator lamp and phonetic alarm, described main relay comprises coil and switch, described general supply connects respectively ignition lock, the coil of main relay, braking liquid level sensor, warning indicator lamp and buzzer phone, described ignition lock connects the switch of main relay, the switch of described main relay connects braking liquid level sensor, described braking liquid level sensor connect respectively warning indicator lamp and and phonetic alarm, the built-in liquid level switch of described braking liquid level sensor, described liquid level switch is arranged on master brake cylinder.
The present invention is by detecting the braking liquid level condition in automobile braking master cylinder, open with closed by the liquid level switch in braking liquid level sensor, carry out the alarm of phonetic alarm and lighting and extinguishing of warning indicator lamp, when wherein braking liquid level sensor is not worked, braking liquid level sensor is in normal off state.In the time that ignition lock is closed, the switch closure of main relay, if braking liquid deficiency, cause the brake-fluid level in master brake cylinder to drop to lower than safety value, the liquid level switch of braking liquid level sensor is closed and is connected circuit, warning indicator lamp is lighted and phonetic alarm sends sound prompting chaufeur, carry out vision and warning acoustically by warning indicator lamp and two aspects of phonetic alarm, can play good warning function for the new hand of the bad chaufeur of driving habit and driving experience deficiency.
As preferably, also comprise the first relay, temperature sensor and micro controller system, described the first relay pack vinculum circle and switch, the coil of described the first relay connects general supply, described ignition lock, the switch of the first relay are connected successively with temperature sensor, described temperature sensor is all connected micro controller system with braking liquid level sensor, described micro controller system connect respectively warning indicator lamp and and phonetic alarm, described temperature sensor is arranged on master brake cylinder.Carry out by temperature sensor the impact that detected temperatures produces braking liquid, thereby avoid causing braking liquid to expand with heat and contract with cold because of the variation of ambient temperature, improve the accuracy that braking liquid level detects.
As preferably, also comprise the second relay and humidity sensor, described the second relay pack vinculum circle and switch, the coil of described the second relay connects general supply, described ignition lock, the switch of the second relay are connected successively with humidity sensor, described humidity sensor connects micro controller system, and described humidity sensor is arranged on master brake cylinder.Detect by humidity sensor the impact that in braking liquid, boiling point situation produces braking liquid, thereby avoid causing braking effect variation because of the variation of braking liquid boiling point, improve the accuracy that braking liquid level detects.
As preferably, also comprise the 3rd relay and ultrasonic liquid leveller, described the 3rd relay pack vinculum circle and switch, the coil of described the 3rd relay connects general supply, described ignition lock, the switch of the 3rd relay are connected successively with ultrasonic liquid leveller, described ultrasonic liquid leveller connects micro controller system, and described ultrasonic liquid leveller is arranged on master brake cylinder.Detect by ultrasonic liquid leveller the impact that the corrosion condition in master brake cylinder produces braking liquid, thereby avoid causing braking effect variation because of master brake cylinder internal corrosion situation, improve the accuracy that braking liquid level detects.
Based on the alarming method of the not enough alarm device of motor vehicle brake fluid, the different pieces of information of obtaining according to braking liquid level sensor, temperature sensor, humidity sensor and ultrasonic liquid leveller, wherein the liquid level switch in braking liquid level sensor in the time not working in normally open, after processing, micro controller system adopts different weight ratios, carry out alarm braking liquid deficiency, concrete operation step is as follows:
(1) closes ignition switch, make the switch of main relay, the first relay, the second relay and the 3rd relay all closed, the signal of braking liquid level sensor is accepted in micro controller system transmission instruction, judge the state of liquid level switch in braking liquid level sensor, if liquid level switch closure, enters into step (2); If liquid level switch is opened, enter into step (4);
(2) micro controller system is accepted braking liquid level sensor and the data-signal for detection of the corrosive ultrasonic liquid leveller of master brake cylinder, and do not accept the data-signal of temperature sensor and humidity sensor, wherein the data weighting of braking liquid level sensor is than being A, the data weighting of ultrasonic liquid leveller is than being B, and the summation of A and B is 1;
(3) micro controller system, according to the data-signal A of braking liquid level sensor and the data-signal B of ultrasonic liquid leveller that receive, is analyzed judgement, if B is more than or equal to A, warning indicator lamp is bright, and phonetic alarm carries out the alarm that master brake cylinder is corroded; If A is greater than B, warning indicator lamp is bright, and phonetic alarm carries out the alarm of brake-fluid level deficiency;
(4) micro controller system is accepted temperature sensor, humidity sensor and the data-signal for detection of the corrosive ultrasonic liquid leveller of master brake cylinder, and do not accept the data-signal of braking liquid level sensor, wherein the data weighting of temperature sensor is than being C, the data weighting of humidity sensor is than being D, the data weighting of ultrasonic liquid leveller is than being E, and the summation of C, D and E is 1;
(5) micro controller system is according to data-signal C, the data-signal D of humidity sensor and the data-signal E of ultrasonic liquid leveller of the temperature sensor receiving, analyze judgement, if the weight ratio maximum of C, warning indicator lamp is bright, and phonetic alarm carries out the alarm of master brake cylinder temperature conditions; If the weight ratio maximum of D, warning indicator lamp is bright, and phonetic alarm carries out the alarm of braking liquid boiling point situation; If the weight ratio maximum of E, warning indicator lamp is bright, and phonetic alarm carries out the alarm that master brake cylinder is corroded.
The corresponding alarming method of the present invention is the different weight ratios based on braking liquid level sensor, temperature sensor, humidity sensor and ultrasonic liquid leveller, judges the particular case of braking liquid.The data-signal wherein detecting taking braking liquid level sensor is as main, in the time that the liquid level switch of braking liquid level sensor is closed, braking liquid deficiency in master brake cylinder is described, need to change braking liquid, so do not need again the temperature in master brake cylinder and humidity data to be detected, only need to detect the corrosion condition in master brake cylinder by ultrasonic liquid leveller, mutually relatively come to determine by the data of braking liquid level sensor and the data of ultrasonic liquid leveller braking liquid deficiency specifically accounts for main cause by which factor, and remind the chaufeur potential safety hazard of taking measures in time to solve by phonetic alarm, in the time that the liquid level switch of braking liquid level sensor disconnects, need the concrete temperature that detects master brake cylinder inside brake liquid, the impact that humidity and corrosion condition cause braking liquid, temperature factor affects the liquid level situation of braking liquid by expanding with heat and contract with cold, humidity factor affects the boiling point situation of braking liquid by the moisture in braking liquid, ultrasonic liquid leveller affects the corrosion condition of braking liquid in master brake cylinder by the wall thickness situation that detects master brake cylinder, by the data processing of micro controller system, determine in three's factor, which factor accounts for main cause, and remind the chaufeur potential safety hazard of taking measures in time to solve by phonetic alarm, design can carry out comparatively whether Shortcomings of complete detection braking liquid by different factors like this, improve the accuracy that braking liquid detects, can make chaufeur take corresponding solution according to different voice alarm simultaneously, improve safety performance.
As preferably, in step (5), if when the specified minimum temperature that ambient temperature is worked lower than ultrasonic liquid leveller, now the data weighting of ultrasonic liquid leveller is 0 than E, warning indicator lamp is bright, and phonetic alarm carries out the alarm of braking liquid boiling point situation.In the time of specified minimum temperature that temperature is worked lower than ultrasonic liquid leveller, because the liquid level switch in braking liquid level sensor disconnects, illustrate that the liquid level of braking liquid is also within the scope of safety value, and according to the principle of expanding with heat and contract with cold, when liquid level one timing in master brake cylinder, in braking liquid, comprise the moisture of part, thereby reduced the boiling point of braking liquid, so phonetic alarm carries out the alarm of braking liquid boiling point situation, need to change braking liquid and improve safety performance.
As preferably, if when the specified highest temperature that ambient temperature is worked higher than ultrasonic liquid leveller, now the data weighting of ultrasonic liquid leveller is 0 than E, and warning indicator lamp is bright, and phonetic alarm carries out the alarm of brake-fluid level deficiency.In the time of specified highest temperature that temperature is worked higher than ultrasonic liquid leveller, because the liquid level switch in braking liquid level sensor disconnects, illustrate that the liquid level of braking liquid is also within the scope of safety value, and according to the principle of expanding with heat and contract with cold, when liquid level one timing in master brake cylinder, the existing partial loss of braking liquid, in the time that temperature declines, braking liquid will, lower than the safety value of liquid level, so phonetic alarm carries out the alarm of brake-fluid level deficiency, need to be changed braking liquid and improve safety performance.
The invention has the beneficial effects as follows: carry out comparatively whether Shortcomings of complete detection braking liquid by different factors, improve the accuracy that braking liquid detects, can make chaufeur take corresponding solution according to different voice alarm, improved safety performance simultaneously; Carry out vision and warning acoustically by warning indicator lamp and two aspects of phonetic alarm, can play good warning function for the new hand of the bad chaufeur of driving habit and driving experience deficiency.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present invention.
1. ignition lock, 2. main relay, 3. braking liquid level sensor, 4. the first relay, 5. temperature sensor, 6. the second relay, 7. humidity sensor, 8. the 3rd relay, 9. ultrasonic liquid leveller, 10. micro controller system, 11. warning indicator lamps, 12. phonetic alarms.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
In embodiment as described in Figure 1, motor vehicle brake fluid deficiency alarm device, comprises general supply, ignition lock 1, main relay 2, braking liquid level sensor 3, warning indicator lamp 11, phonetic alarm 12, the first relay 4, temperature sensor 5, the second relay 6, humidity sensor 7, the 3rd relay 8, ultrasonic liquid leveller 9 and micro controller system 10, main relay 2, the first relay 4, the second relay 6 and the 3rd relay 8 include coil and switch, and general supply connects respectively ignition lock 1, the coil of main relay 2, braking liquid level sensor 3, the coil of the first relay 4, temperature sensor 5, the coil of the second relay 6, humidity sensor 7, the coil of the 3rd relay 8, ultrasonic liquid leveller 9, warning indicator lamp 11 and buzzer phone, ignition lock 1 connects respectively the switch of main relay 2, the switch of the first relay 4, the switch of the switch of the second relay 6 and the 3rd relay 8, the switch of main relay 2 connects braking liquid level sensor 3, the switch of the first relay 4 connects temperature sensor 5, the switch of the second relay 6 connects humidity sensor 7, the switch of the 3rd relay 8 connects ultrasonic liquid leveller 9, braking liquid level sensor 3, temperature sensor 5, humidity sensor 7 and ultrasonic liquid leveller 9 are all connected the input end of micro controller system 10, the mouth of micro controller system 10 connect warning indicator lamp 11 and and phonetic alarm 12, the built-in liquid level switch of braking liquid level sensor 3, liquid level switch, temperature sensor 5, humidity sensor 7 and ultrasonic liquid leveller 9 are installed on master brake cylinder.
Based on the alarming method of the not enough alarm device of motor vehicle brake fluid, the different pieces of information of obtaining according to braking liquid level sensor 3, temperature sensor 5, humidity sensor 7 and ultrasonic liquid leveller 9, wherein the liquid level switch in braking liquid level sensor 3 in the time not working in normally open, after processing, micro controller system 10 adopts different weight ratios, carry out alarm braking liquid deficiency, concrete operation step is as follows:
(1) closes ignition switch 1, make the switch of main relay 2, the first relay 4, the second relay 6 and the 3rd relay 8 all closed, micro controller system 10 sends instruction accepts the signal of braking liquid level sensor 3, judge the state of liquid level switch in braking liquid level sensor 3, if liquid level switch closure, enters into step (2); If liquid level switch is opened, enter into step (4);
(2) micro controller system 10 is accepted braking liquid level sensor 3 and the data-signal for detection of the corrosive ultrasonic liquid leveller 9 of master brake cylinder, and do not accept the data-signal of temperature sensor 5 and humidity sensor 7, wherein the data weighting of braking liquid level sensor 3 is than being A, the data weighting of ultrasonic liquid leveller 9 is than being B, and the summation of A and B is 1;
(3) micro controller system 10 is according to the data-signal A of braking liquid level sensor 3 and the data-signal B of ultrasonic liquid leveller 9 that receive, analyze judgement, if B is more than or equal to A, warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm that master brake cylinder is corroded; If A is greater than B, warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm of brake-fluid level deficiency;
(4) micro controller system 10 is accepted temperature sensor 5, humidity sensor 7 and the data-signal for detection of the corrosive ultrasonic liquid leveller 9 of master brake cylinder, and do not accept the data-signal of braking liquid level sensor 3, wherein the data weighting of temperature sensor 5 is than being C, the data weighting of humidity sensor 7 is than being D, the data weighting of ultrasonic liquid leveller 9 is than being E, and the summation of C, D and E is 1;
(5) micro controller system 10 is according to data-signal C, the data-signal D of humidity sensor 7 and the data-signal E of ultrasonic liquid leveller 9 of the temperature sensor 5 receiving, analyze judgement, if the weight ratio maximum of C, warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm of master brake cylinder temperature conditions; If the weight ratio maximum of D, warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm of braking liquid boiling point situation; If the weight ratio maximum of E, warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm that master brake cylinder is corroded.
Wherein: in step (5), if when the specified minimum temperature that ambient temperature is worked lower than ultrasonic liquid leveller 9, now the data weighting of ultrasonic liquid leveller 9 is 0 than E, and warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm of braking liquid boiling point situation; If when the specified highest temperature that ambient temperature is worked higher than ultrasonic liquid leveller 9, now the data weighting of ultrasonic liquid leveller 9 is 0 than E, and warning indicator lamp 11 is bright, and phonetic alarm 12 carries out the alarm of brake-fluid level deficiency.
The present invention is the different weight ratios based on braking liquid level sensor 3, temperature sensor 5, humidity sensor 7 and ultrasonic liquid leveller 9, judges the particular case of braking liquid.Wherein taking the level switch signal in braking liquid level sensor 3 as main, in the time that the liquid level switch of braking liquid level sensor 3 is closed, braking liquid in master brake cylinder is lower than safety value, braking liquid deficiency in master brake cylinder is described, need to change braking liquid, so do not need again the temperature in master brake cylinder and humidity data to be detected, only need to detect the corrosion condition in master brake cylinder by ultrasonic liquid leveller 9, mutually relatively come to determine by the data of braking liquid level sensor 3 and the data of ultrasonic liquid leveller 9 braking liquid deficiency specifically accounts for main cause by which factor, when warning indicator lamp 11 is lighted, and remind the chaufeur potential safety hazard of taking measures in time to solve by phonetic alarm 12, in the time that the liquid level switch of braking liquid level sensor 3 disconnects, need the concrete temperature that detects master brake cylinder inside brake liquid, the impact that humidity and corrosion condition cause braking liquid, temperature factor affects the liquid level situation of braking liquid by expanding with heat and contract with cold, humidity factor affects the boiling point situation of braking liquid by the moisture in braking liquid, ultrasonic liquid leveller 9 affects the corrosion condition of braking liquid in master brake cylinder by the wall thickness situation that detects master brake cylinder, by the data processing of micro controller system 10, determine in three's factor, which factor accounts for main cause, and remind the chaufeur potential safety hazard of taking measures in time to solve by phonetic alarm 12.Design can carry out comparatively whether Shortcomings of complete detection braking liquid by different factors like this, improves the accuracy that braking liquid detects, and can make chaufeur take corresponding solution according to different voice alarm simultaneously, has improved safety performance; Carry out vision and warning acoustically by warning indicator lamp 11 and 12 two aspects of phonetic alarm, can play good warning function for the new hand of the bad chaufeur of driving habit and driving experience deficiency.
Claims (7)
1. the not enough alarm device of motor vehicle brake fluid, it is characterized in that, comprise general supply, ignition lock (1), main relay (2), braking liquid level sensor (3), warning indicator lamp (11) and phonetic alarm (12), described main relay (2) comprises coil and switch, described general supply connects respectively ignition lock (1), the coil of main relay (2), braking liquid level sensor (3), warning indicator lamp (11) and buzzer phone, described ignition lock (1) connects the switch of main relay (2), the switch of described main relay (2) connects braking liquid level sensor (3), described braking liquid level sensor (3) connect respectively warning indicator lamp (11) and and phonetic alarm (12), the built-in liquid level switch of described braking liquid level sensor (3), described liquid level switch is arranged on master brake cylinder.
2. the not enough alarm device of motor vehicle brake fluid according to claim 1, it is characterized in that, also comprise the first relay (4), temperature sensor (5) and micro controller system (10), described the first relay (4) comprises coil and switch, the coil of described the first relay (4) connects general supply, described ignition lock (1), the switch of the first relay (4) is connected successively with temperature sensor (5), described temperature sensor (5) is all connected micro controller system (10) with braking liquid level sensor (3), described micro controller system (10) connect respectively warning indicator lamp (11) and and phonetic alarm (12), described temperature sensor (5) is arranged on master brake cylinder.
3. the not enough alarm device of motor vehicle brake fluid according to claim 2 and method thereof, it is characterized in that, also comprise the second relay (6) and humidity sensor (7), described the second relay (6) comprises coil and switch, the coil of described the second relay (6) connects general supply, described ignition lock (1), the switch of the second relay (6) are connected successively with humidity sensor (7), described humidity sensor (7) connects micro controller system (10), and described humidity sensor (7) is arranged on master brake cylinder.
4. according to the not enough alarm device of the motor vehicle brake fluid described in claim 2 or 3 and method thereof, it is characterized in that, also comprise the 3rd relay (8) and ultrasonic liquid leveller (9), described the 3rd relay (8) comprises coil and switch, the coil of described the 3rd relay (8) connects general supply, described ignition lock (1), the switch of the 3rd relay (8) is connected successively with ultrasonic liquid leveller (9), described ultrasonic liquid leveller (9) connects micro controller system (10), described ultrasonic liquid leveller (9) is arranged on master brake cylinder.
5. the alarming method based on the not enough alarm device of motor vehicle brake fluid, it is characterized in that, the different pieces of information of obtaining according to braking liquid level sensor (3), temperature sensor (5), humidity sensor (7) and ultrasonic liquid leveller (9), wherein the liquid level switch in braking liquid level sensor (3) in the time not working in normally open, after processing, micro controller system (10) adopts different weight ratios, carry out alarm braking liquid deficiency, concrete operation step is as follows:
(1) closes ignition switch (1), make the switch of main relay (2), the first relay (4), the second relay (6) and the 3rd relay (8) all closed, the signal of braking liquid level sensor (3) is accepted in micro controller system (10) transmission instruction, judge the state of liquid level switch in braking liquid level sensor (3), if liquid level switch closure, enters into step (2); If liquid level switch is opened, enter into step (4);
(2) micro controller system (10) is accepted braking liquid level sensor (3) and the data-signal for detection of the corrosive ultrasonic liquid leveller of master brake cylinder (9), and do not accept the data-signal of temperature sensor (5) and humidity sensor (7), wherein the data weighting of braking liquid level sensor (3) is than being A, the data weighting of ultrasonic liquid leveller (9) is than being B, and the summation of A and B is 1;
(3) micro controller system (10) is according to the data-signal A of braking liquid level sensor (3) and the data-signal B of ultrasonic liquid leveller (9) that receive, analyze judgement, if B is more than or equal to A, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm that master brake cylinder is corroded; If A is greater than B, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm of brake-fluid level deficiency;
(4) micro controller system (10) is accepted temperature sensor (5), humidity sensor (7) and the data-signal for detection of the corrosive ultrasonic liquid leveller of master brake cylinder (9), and do not accept the data-signal of braking liquid level sensor (3), wherein the data weighting of temperature sensor (5) is than being C, the data weighting of humidity sensor (7) is than being D, the data weighting of ultrasonic liquid leveller (9) is than being E, and the summation of C, D and E is 1;
(5) micro controller system (10) is according to data-signal C, the data-signal D of humidity sensor (7) and the data-signal E of ultrasonic liquid leveller (9) of the temperature sensor (5) receiving, analyze judgement, if the weight ratio maximum of C, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm of master brake cylinder temperature conditions; If the weight ratio maximum of D, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm of braking liquid boiling point situation; If the weight ratio maximum of E, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm that master brake cylinder is corroded.
6. the alarming method based on the not enough alarm device of motor vehicle brake fluid according to claim 5, it is characterized in that, in step (5), if when the specified minimum temperature that ambient temperature is worked lower than ultrasonic liquid leveller (9), now the data weighting of ultrasonic liquid leveller (9) is 0 than E, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm of braking liquid boiling point situation.
7. the alarming method based on the not enough alarm device of motor vehicle brake fluid according to claim 5, it is characterized in that, in step (5), if when the specified highest temperature that ambient temperature is worked higher than ultrasonic liquid leveller (9), now the data weighting of ultrasonic liquid leveller (9) is 0 than E, warning indicator lamp (11) is bright, and phonetic alarm (12) carries out the alarm of brake-fluid level deficiency.
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| CN201310753783.6A CN104085390B (en) | 2013-12-31 | 2013-12-31 | Motor vehicle brake fluid deficiency warning devices and method thereof |
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| CN201310753783.6A CN104085390B (en) | 2013-12-31 | 2013-12-31 | Motor vehicle brake fluid deficiency warning devices and method thereof |
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| CN104085390A true CN104085390A (en) | 2014-10-08 |
| CN104085390B CN104085390B (en) | 2016-08-17 |
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| CN104260718A (en) * | 2014-10-11 | 2015-01-07 | 北京英创汇智科技有限公司 | Brake system for realizing self-protection function of electric vacuum pump and control method thereof |
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| CN106976451A (en) * | 2016-01-19 | 2017-07-25 | 上海汽车集团股份有限公司 | Vehicle dynamic stability control system and its control method |
| CN106976451B (en) * | 2016-01-19 | 2020-01-31 | 上海汽车集团股份有限公司 | Vehicle dynamic stability control system and control method thereof |
| CN107554505A (en) * | 2016-06-28 | 2018-01-09 | 罗伯特·博世有限公司 | The slow drop method and system in motor vehicle abrupt slope |
| CN106240555A (en) * | 2016-09-07 | 2016-12-21 | 北京新能源汽车股份有限公司 | Electric automobile and brake control method and system thereof |
| CN106240555B (en) * | 2016-09-07 | 2019-08-02 | 北京新能源汽车股份有限公司 | Electric automobile and brake control method and system thereof |
| CN111231926A (en) * | 2020-01-21 | 2020-06-05 | 山东华宇工学院 | Intelligent early warning system for automobile brake fluid |
| CN111231926B (en) * | 2020-01-21 | 2022-01-25 | 山东华宇工学院 | Intelligent early warning system for automobile brake fluid |
| WO2021208235A1 (en) * | 2020-04-16 | 2021-10-21 | 新石器慧通（北京）科技有限公司 | Unmanned means of transport, and safety checking method for brake system thereof |
| CN114132300A (en) * | 2021-12-31 | 2022-03-04 | 江苏林海动力机械集团有限公司 | Alarming system for insufficient brake fluid pressure of all-terrain vehicle |
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