CN111252059A - Service brake air pressure monitoring fault alarm system and alarm method for pure electric bus - Google Patents
Service brake air pressure monitoring fault alarm system and alarm method for pure electric bus Download PDFInfo
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- CN111252059A CN111252059A CN202010203907.3A CN202010203907A CN111252059A CN 111252059 A CN111252059 A CN 111252059A CN 202010203907 A CN202010203907 A CN 202010203907A CN 111252059 A CN111252059 A CN 111252059A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a service brake air pressure monitoring fault alarm system and an alarm method of a pure electric bus, which comprises a whole vehicle VCU, an instrument panel and a brake master cylinder which are connected with the whole vehicle VCU, a whole vehicle air pressure sensor and an instrument chamber pressure monitoring sensor group which are connected with the instrument panel, wherein the instrument panel is provided with an instrument CPU, an instrument display screen and an instrument buzzer, the instrument chamber pressure monitoring sensor group comprises a left front brake chamber pressure sensor, a right front brake chamber pressure sensor, a left rear brake chamber pressure sensor and a right rear brake chamber pressure sensor, and the left front brake chamber pressure sensor, the right front brake chamber pressure sensor, the left rear brake chamber pressure sensor, the right rear brake chamber pressure sensor, the whole vehicle air pressure sensor and the whole vehicle VCU are all connected to the instrument CPU. The invention adds the service brake chamber pressure sensor on the basis of the whole vehicle air pressure sensor, effectively monitors the pressure of the brake chamber, avoids the potential safety hazard caused by abnormal service brake operation, and effectively reduces traffic accidents.
Description
The technical field is as follows:
the invention relates to a service brake air pressure monitoring fault alarm system and method for a pure electric bus, and belongs to the technical field of automobile parts.
Background art:
the normal service braking function of the passenger car is a necessary condition for the vehicle to run, the service braking force depends on the pressure of the air chamber, and the maintenance of the pressure of the air chamber in a normal value range is important. When the vehicle works normally, because the working environment is complex, the brake pipeline can be damaged due to various reasons, or the brake valve body is in mechanical failure, so that the brake system works abnormally or fails completely. If the driver can not know the service brake fault in time and gets out of the vehicle, the potential safety hazard is very high.
In view of the above, it is desirable to develop a service brake air pressure monitoring fault alarm system and an alarm method for a pure electric passenger vehicle.
The invention content is as follows:
the invention provides a pure electric bus service brake air pressure monitoring fault alarm system and an alarm method for solving the problems in the prior art, which are used for judging whether the pressure values of front and rear wheel brake air chambers of a whole vehicle are normal or not based on the air pressure value of the whole vehicle and pedal opening degree signals during service brake, timely giving a fault alarm to a driver if the pressure values of the left and right wheel air chambers differ by more than an allowable value or the pressure values of the front and rear axle brake air chambers are lower than a normal value, and simultaneously giving an alarm prompt for simultaneously carrying out instrument display and sound prompt to prompt the driver that the service brake of the vehicle is abnormal and timely carrying out safety check to eliminate safety risks.
The invention adopts the following technical scheme: the utility model provides a pure [ electric ] motor coach service brake air pressure monitoring fault alarm system, includes whole car VCU, the panel board and the brake master cylinder that link to each other with whole car VCU, the whole car baroceptor and the room pressure monitoring sensor group that links to each other with the panel board, be equipped with instrument CPU, instrument display screen and instrument buzzer on the panel board, room pressure monitoring sensor group is including left front brake chamber pressure sensor, right front brake chamber pressure sensor, left back brake chamber pressure sensor and right back brake chamber pressure sensor, left front brake chamber pressure sensor, right back brake chamber pressure sensor, whole car baroceptor and whole car VCU all are connected to on the instrument CPU.
The invention also adopts the following technical scheme: a method for monitoring and alarming faults of service brake air pressure of a pure electric bus comprises the following steps:
the method comprises the following steps: the pressure sensor of the left front brake air chamber and the pressure sensor of the right front brake air chamber respectively monitor the pressure of the left brake air chamber and the right brake air chamber of the front axle during service braking, data are transmitted to the CPU of the instrument, the CPU of the instrument analyzes and judges, if the pressure difference value of the left brake air chamber of the front axle and the right brake air chamber of the front axle is more than 25 percent, the brake fault is judged, and the CPU of the instrument sends an instruction to the display screen of the instrument and the buzzer of the instrument to carry out fault alarm;
step two: the pressure sensors of the left rear brake air chamber and the right rear brake air chamber respectively monitor the pressure of the left brake air chamber and the right brake air chamber of the rear axle during service braking, data are transmitted to the CPU of the instrument, the CPU of the instrument analyzes and judges, if the pressure difference value of the left brake air chamber of the rear axle and the right brake air chamber of the rear axle is more than 25 percent, the brake fault is judged, and the CPU of the instrument sends an instruction to the display screen of the instrument and the buzzer of the instrument to give a fault alarm;
step three: service braking, when the pressure difference value of the left brake air chamber and the right brake air chamber is 25%, the VCU of the whole vehicle collects the opening information of a brake master cylinder, the opening information is transmitted to the instrument CPU after conversion, the instrument CPU collects signals of a pressure sensor of the whole vehicle at the same time, analysis is carried out by combining the pressure values of the front brake air chamber and the rear brake air chamber, if the pressure values of the front brake air chamber and the rear brake air chamber are lower than the air pressure corresponding to the opening of the brake pedal at the moment, and the ratio of the pressure difference value to the output air pressure of the brake pedal exceeds 30%, the service braking fault is judged, and the.
The invention has the following beneficial effects: the invention adds the service brake chamber pressure sensor on the basis of the whole vehicle pressure sensor, can effectively monitor the pressure of the brake chamber, avoids the potential safety hazard caused by abnormal service brake operation, and can effectively reduce traffic accidents. And only need increase 4 baroceptors, change the instrument CPU control logic just can realize, the design concept is simple, ingenious, effective, is fit for generally promoting.
Description of the drawings:
FIG. 1 is a schematic diagram of a service brake air pressure monitoring fault alarm system of a pure electric bus.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
The invention relates to a service brake air pressure monitoring fault alarm system of a pure electric passenger car, which comprises a whole car VCU1, an instrument panel 2 and a brake master cylinder 5 which are connected with the whole car VCU1, a whole car air pressure sensor 4 and a whole car pressure monitoring sensor group 3 which are connected with the instrument panel 2, wherein an instrument CPU21, an instrument display screen 22 and an instrument buzzer 23 are arranged on the instrument panel 2, the air chamber pressure monitoring sensor group 3 comprises a left front brake air chamber pressure sensor 31, a right front brake air chamber pressure sensor 32, a left rear brake air chamber pressure sensor 33 and a right rear brake air chamber pressure sensor 34, and the left front brake air chamber pressure sensor 31, the right front brake air chamber pressure sensor 32, the left rear brake air chamber pressure sensor 33, the right rear brake air chamber pressure sensor 34, the whole car air pressure sensor 4 and the whole car VCU1 are all connected to the instrument.
The invention discloses a method for monitoring service brake air pressure and alarming faults of a pure electric bus, which comprises the following steps:
the method comprises the following steps: the left front brake air chamber pressure sensor 31 and the right front brake air chamber pressure sensor 32 respectively monitor the pressure of a front axle left brake air chamber and a front axle right brake air chamber during service braking, data are transmitted to an instrument CPU21, the instrument CPU21 carries out analysis and judgment, if the pressure difference value of the front axle left brake air chamber and the front axle right brake air chamber is more than 25%, a brake fault is judged, and the instrument CPU21 sends an instruction to an instrument display screen 22 and an instrument buzzer 23 to carry out fault alarm;
step two: the left rear brake air chamber pressure sensor 33 and the right rear brake air chamber pressure sensor 34 respectively monitor the pressure of the left brake air chamber and the right brake air chamber of the rear axle during service braking, data are transmitted to the instrument CPU21, the instrument CPU21 carries out analysis and judgment, if the pressure difference value of the left brake air chamber of the rear axle and the right brake air chamber of the rear axle is more than 25 percent, the brake fault is judged, and the instrument CPU21 sends an instruction to the instrument display screen 22 and the instrument buzzer 23 to carry out fault alarm;
step three: during service braking, when the pressure difference value of the left brake air chamber and the right brake air chamber is 25%, the whole vehicle VCU1 collects the opening information of a brake master pump 5, the opening information is converted and sent to an instrument CPU21, the instrument CPU21 simultaneously collects signals of a whole vehicle air pressure sensor 4, analysis is carried out by combining the pressure values of front and rear brake air chambers, if the pressure values of the front and rear brake air chambers (the left front brake air chamber pressure sensor 31, the right front brake air chamber pressure sensor 32, the left rear brake air chamber pressure sensor 33 and the right rear brake air chamber pressure sensor 34) are lower than the air pressure corresponding to the opening of a brake pedal at the moment and the ratio of the difference value to the output air pressure of the brake pedal exceeds 30%, the service braking fault is judged, the instrument CPU21 sends an instruction to an instrument display screen 22 and an instrument buzzer 23 to carry out fault alarm, and at the moment (the signal values of the left front brake air chamber pressure, the signal values of the left rear brake chamber pressure sensor 33 and the right rear brake chamber pressure sensor 34 abnormally indicate "insufficient rear axle braking force").
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (2)
1. The utility model provides a pure [ electric ] motor coach service brake air pressure monitoring fault alarm system which characterized in that: comprises a whole VCU (1), an instrument panel (2) and a brake master cylinder (5) which are connected with the whole VCU (1), a whole air pressure sensor (4) and an air chamber pressure monitoring sensor group (3) which are connected with the instrument panel (2), the instrument panel (2) is provided with an instrument CPU (21), an instrument display screen (22) and an instrument buzzer (23), the air chamber pressure monitoring sensor group (3) comprises a left front brake air chamber pressure sensor (31), a right front brake air chamber pressure sensor (32), a left rear brake air chamber pressure sensor (33) and a right rear brake air chamber pressure sensor (34), the left front brake chamber pressure sensor (31), the right front brake chamber pressure sensor (32), the left rear brake chamber pressure sensor (33), the right rear brake chamber pressure sensor (34), the whole vehicle air pressure sensor (4) and the whole vehicle VCU (1) are connected to the instrument CPU (21).
2. A pure [ electric ] motor coach service brake air pressure monitoring malfunction alerting method which characterized in that: the method comprises the following steps:
the method comprises the following steps: the left front brake air chamber pressure sensor (31) and the right front brake air chamber pressure sensor (32) respectively monitor the pressure of a front axle left brake air chamber and a front axle right brake air chamber during service braking, data are transmitted to the instrument CPU (21), the instrument CPU (21) analyzes and judges, if the pressure difference value of the front axle left brake air chamber and the front axle right brake air chamber is more than 25%, a brake fault is judged, and the instrument CPU (21) sends an instruction to the instrument display screen (22) and the instrument buzzer (23) to alarm the fault;
step two: the left rear brake air chamber pressure sensor (33) and the right rear brake air chamber pressure sensor (34) respectively monitor the pressure of a rear axle left brake air chamber and a rear axle right brake air chamber during service braking, data are transmitted to the instrument CPU (21), the instrument CPU (21) analyzes and judges, if the pressure difference value of the rear axle left brake air chamber and the rear axle right brake air chamber is more than 25%, a brake fault is judged, and the instrument CPU (21) sends an instruction to the instrument display screen (22) and the instrument buzzer (23) to alarm the fault;
step three: service braking, when the pressure difference value of the left and right brake air chambers is 25%, the VCU (1) of the whole vehicle collects the opening information of a brake master cylinder (5), the opening information is transmitted to an instrument CPU (21) after conversion, the instrument CPU (21) collects signals of a pressure sensor (4) of the whole vehicle at the same time, analysis is carried out by combining the pressure values of the front brake air chamber and the rear brake air chamber, if the pressure values of the front brake air chamber and the rear brake air chamber are lower than the air pressure corresponding to the opening of a brake pedal at the moment, and the ratio of the pressure difference value to the output air pressure of the brake pedal exceeds 30%, the service braking fault is judged, and the instrument CPU (21) transmits an instruction to an instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010203907.3A CN111252059A (en) | 2020-03-21 | 2020-03-21 | Service brake air pressure monitoring fault alarm system and alarm method for pure electric bus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010203907.3A CN111252059A (en) | 2020-03-21 | 2020-03-21 | Service brake air pressure monitoring fault alarm system and alarm method for pure electric bus |
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| CN111252059A true CN111252059A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010203907.3A Pending CN111252059A (en) | 2020-03-21 | 2020-03-21 | Service brake air pressure monitoring fault alarm system and alarm method for pure electric bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734974A (en) * | 2022-04-26 | 2022-07-12 | 三一电动车科技有限公司 | Vehicle brake system fault diagnosis method, device and system and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0477519A1 (en) * | 1990-09-26 | 1992-04-01 | Robert Bosch Gmbh | Electro-pneumatic brake system |
| KR19980018015U (en) * | 1996-09-25 | 1998-07-06 | 양재신 | Pressure check alarm due to brake break of vehicle |
| KR19980050727U (en) * | 1996-12-30 | 1998-10-07 | 박병재 | Differential pressure warning device for preventing braking of vehicle brake system |
| CN101332813A (en) * | 2008-08-06 | 2008-12-31 | 清华大学 | Vehicle brake efficacy monitoring and alarm system |
| CN102343904A (en) * | 2010-08-02 | 2012-02-08 | 北汽福田汽车股份有限公司 | Alarm device of hydraulic brake system and alarm method |
| CN212289806U (en) * | 2020-03-21 | 2021-01-05 | 南京金龙客车制造有限公司 | Service brake air pressure monitoring fault alarm system for pure electric bus |
-
2020
- 2020-03-21 CN CN202010203907.3A patent/CN111252059A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0477519A1 (en) * | 1990-09-26 | 1992-04-01 | Robert Bosch Gmbh | Electro-pneumatic brake system |
| KR19980018015U (en) * | 1996-09-25 | 1998-07-06 | 양재신 | Pressure check alarm due to brake break of vehicle |
| KR19980050727U (en) * | 1996-12-30 | 1998-10-07 | 박병재 | Differential pressure warning device for preventing braking of vehicle brake system |
| CN101332813A (en) * | 2008-08-06 | 2008-12-31 | 清华大学 | Vehicle brake efficacy monitoring and alarm system |
| CN102343904A (en) * | 2010-08-02 | 2012-02-08 | 北汽福田汽车股份有限公司 | Alarm device of hydraulic brake system and alarm method |
| CN212289806U (en) * | 2020-03-21 | 2021-01-05 | 南京金龙客车制造有限公司 | Service brake air pressure monitoring fault alarm system for pure electric bus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734974A (en) * | 2022-04-26 | 2022-07-12 | 三一电动车科技有限公司 | Vehicle brake system fault diagnosis method, device and system and vehicle |
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