CN115092107B - Safety alarm device and method for vacuum power-assisted system of new energy commercial vehicle - Google Patents
Safety alarm device and method for vacuum power-assisted system of new energy commercial vehicle Download PDFInfo
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- CN115092107B CN115092107B CN202210529327.2A CN202210529327A CN115092107B CN 115092107 B CN115092107 B CN 115092107B CN 202210529327 A CN202210529327 A CN 202210529327A CN 115092107 B CN115092107 B CN 115092107B
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- vacuum
- vcu unit
- vcu
- vacuum degree
- threshold value
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 230000002159 abnormal effect Effects 0.000 claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- 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
Abstract
The invention discloses a safety alarm device and a method of a vacuum power-assisted system of a new energy commercial vehicle, wherein the safety alarm device is adopted, and the safety alarm method comprises the following steps: after the whole vehicle is electrified, firstly, judging whether the vacuum degree physical signal quantity of the vacuum tank acquired by the signal acquisition processing module reaches an air extraction threshold value or not through the VCU unit; if the physical signal quantity of the vacuum degree reaches the air extraction threshold value, the VCU unit instructs the vacuum pump to vacuumize the vacuum tank, and the timer starts t1 to count; the VCU unit continues to judge whether the vacuum degree physical signal quantity reaches a shutdown threshold value; if the shutdown threshold is reached, the VCU unit instructs the vacuum pump to stop pumping, and the timer starts t 2; and repeating the steps circularly. The safety alarm method is used for distinguishing whether the vacuum degree is caused by normal use or abnormal faults when the vacuum degree is low or not by introducing the vacuum degree signal, the brake pedal signal and the timer, and forecasting the risk in advance.
Description
Technical Field
The invention relates to the field of new energy automobile manufacturing, in particular to a safety alarm device and a method for a new energy commercial automobile vacuum power assisting system.
Background
The vacuum booster system belongs to an important component of a braking system, has important significance for driving safety, and is used for controlling the vacuum pump to pump air under the condition that the vacuum degree of the vacuum tank is lower than a certain fixed threshold value, so as to provide the vacuum degree, but the current vacuum alarm mainly alarms when the vacuum degree is lower, wherein the alarm condition comprises the condition that the air pressure is lower when the vacuum booster system is normally used and the air pressure is lower when the vacuum booster system fails, and the alarm method covers the real failure, so that risks cannot be identified in advance, and potential safety hazards are caused.
The current vacuum boosting alarm strategy is: when the vacuum degree of the vacuum tank is lower than a set air extraction threshold value, sending an alarm signal to the VCU, and controlling the vacuum pump to vacuumize the vacuum tank by the VCU (core electronic control unit); when the vacuum level of the vacuum tank is higher than the shutdown threshold, the sending of the alarm signal is stopped, and the VCU stops the vacuum pump again, as shown in FIG. 1.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a safety alarm device of a vacuum assistance system of a new energy commercial vehicle, which introduces a brake pedal signal and a timer and can assist the alarm of the vacuum assistance system to be more accurate.
The invention further aims to provide a safety alarm method of the vacuum power assisting system of the new energy commercial vehicle, which is used for distinguishing whether the vacuum degree is caused by normal use or abnormal faults when the vacuum degree is low or not by introducing a vacuum degree signal, a brake pedal signal and a timer.
In order to achieve the aim, the invention provides a safety alarm device of a new energy commercial vehicle vacuum power assisting system, which comprises a VCU unit, a vacuum tank, a vacuum pump and a brake pedal; the VCU unit comprises a signal acquisition processing module; the vacuum tank is in data connection with the VCU unit, and the VCU unit collects and processes vacuum degree signals of the vacuum tank through the signal acquisition and processing module; the vacuum pump is communicated with the vacuum tank and used for vacuumizing the vacuum tank, is also in data connection with the VCU unit and receives a starting or stopping instruction from the VCU unit; the brake pedal is in data connection with the VCU unit, and the VCU unit collects and processes pedal signals of the brake pedal through the signal collecting and processing module.
In a preferred embodiment, the VCU unit further includes a timer, where the timer is configured to determine whether the vacuum assist system is in an abnormal state with a timing duration of the signal acquisition and processing module acquiring and processing the signal.
In order to achieve the other purpose, the invention also provides a safety alarm method of the vacuum power assisting system of the new energy commercial vehicle, which adopts the safety alarm device, and the safety alarm method comprises the following steps: after the whole vehicle is electrified, firstly, judging whether the vacuum degree physical signal quantity of the vacuum tank acquired by the signal acquisition processing module reaches an air extraction threshold value or not through the VCU unit; if the physical signal quantity of the vacuum degree reaches the air extraction threshold value, the VCU unit instructs the vacuum pump to vacuumize the vacuum tank, and the timer starts t1 to count; the VCU unit continues to judge whether the vacuum degree physical signal quantity reaches a shutdown threshold value; if the shutdown threshold is reached, the VCU unit instructs the vacuum pump to stop pumping, and the timer starts t 2; and repeating the steps circularly.
In a preferred embodiment, if the vacuum level physical signal does not reach the shutdown threshold, the VCU unit continues to determine if the t1 timer exceeds the set time; if the t1 timing exceeds the set time, the VCU unit instructs the vacuum pump to stop pumping; the VCU unit continuously judges whether the vacuum degree physical signal quantity is in an alarm range; if the vacuum degree physical signal quantity is in the alarm range, the VCU unit considers that the vacuum power assisting system is abnormal and reports faults; if the vacuum degree physical signal quantity is not in the alarm range, the VCU unit returns to monitor and judges whether the vacuum degree physical signal quantity reaches the air extraction threshold value; and repeating the steps circularly.
In a preferred embodiment, if the t1 timer does not exceed the set time, the VCU unit instructs the vacuum pump to continue evacuating the vacuum tank.
In a preferred embodiment, if the physical signal quantity of the vacuum degree reaches the pumping threshold value and the time t2 exceeds the set time, the VCU unit considers that the vacuum booster system is abnormal and reports a fault, and simultaneously, instructs the vacuum pump to continue pumping the vacuum tank.
In a preferred embodiment, the determination of whether the bleed threshold is reached, whether the shutdown threshold is reached, and whether the alarm range is in the alarm range is performed on the premise that the signal acquisition processing module of the VCU unit does not receive pedal information for the brake pedal.
In a preferred embodiment, when the signal acquisition processing module of the VCU unit receives the pedal information of the brake pedal, the t1 timer and the t2 timer are set to zero.
Compared with the prior art, the safety alarm device and the method for the vacuum assistance system of the new energy commercial vehicle have the following beneficial effects: according to the scheme, on the basis of the safety alarm device of the vacuum assistance system in the prior art, the brake pedal and the timer are matched with the VCU unit, and the safety requirement of the vacuum assistance system is combined with the new energy commercial vehicle, and the timing result of the vacuum degree signal, the brake pedal signal and the timer is used for distinguishing whether the vacuum degree is caused by normal use or caused by abnormal faults when the vacuum degree is low, so that on one hand, the abnormal problem of the assistance system can be correctly identified, the driver is informed in advance, hidden risks are checked, and on the other hand, the practicability and economic benefits of the vacuum assistance system can be improved. The method has the advantages of simple implementation and better guarantee of the stability of the brake system.
Drawings
FIG. 1 is a schematic diagram of the architectural arrangement of a safety alarm device of a vacuum assist system according to an embodiment of the prior art;
FIG. 2 is a schematic diagram of the architectural arrangement of a safety alarm device of a vacuum assist system according to an embodiment of the invention;
fig. 3 is a flow chart of a safety warning method of a vacuum assist system according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 2, a safety alarm device of a vacuum booster system of a new energy commercial vehicle according to a preferred embodiment of the present invention mainly includes a VCU unit, a vacuum tank, a vacuum pump, a brake pedal, and the like. The VCU unit comprises a signal acquisition processing module and a timer. The vacuum tank is in data connection with the VCU unit, and the VCU unit collects and processes vacuum degree signals of the vacuum tank through the signal acquisition and processing module. The vacuum pump is communicated with the vacuum tank and is used for vacuumizing the vacuum tank, and the vacuum pump is also in data connection with the VCU unit and receives a starting or stopping instruction from the VCU unit. The brake pedal is in data connection with the VCU unit, and the VCU unit collects and processes pedal signals of the brake pedal through the signal collecting and processing module. The timer is used for judging whether the vacuum power-assisted system is in an abnormal state or not with the timing duration of the signal acquisition and processing module for acquiring and processing the signal.
As shown in fig. 3, a safety alarm method of a vacuum booster system of a new energy commercial vehicle according to a preferred embodiment of the present invention, which adopts the safety alarm device as described above, includes: after the whole vehicle is electrified, firstly, judging whether the vacuum degree physical signal quantity of the vacuum tank acquired by the signal acquisition processing module reaches an air extraction threshold value or not through the VCU unit; if the physical signal quantity of the vacuum degree reaches the air extraction threshold value, the VCU unit instructs the vacuum pump to vacuumize the vacuum tank, and the timer starts t1 to count; the VCU unit continues to judge whether the vacuum degree physical signal quantity reaches a shutdown threshold value; if the shutdown threshold is reached, the VCU unit instructs the vacuum pump to stop pumping, and the timer starts t 2; and repeating the steps circularly.
In some embodiments, if the vacuum level physical signal does not reach the shutdown threshold, the VCU unit continues to determine if the t1 timer exceeds the set time; if the t1 timing exceeds the set time, the VCU unit instructs the vacuum pump to stop pumping; the VCU unit continuously judges whether the vacuum degree physical signal quantity is in an alarm range; if the vacuum degree physical signal quantity is in the alarm range, the VCU unit considers that the vacuum power assisting system is abnormal and reports faults; if the vacuum degree physical signal quantity is not in the alarm range, the VCU unit returns to monitor and judges whether the vacuum degree physical signal quantity reaches the air extraction threshold value; and repeating the steps circularly.
In some embodiments, if the t1 timer does not exceed the set time, the VCU unit instructs the vacuum pump to continue to evacuate the vacuum tank.
In some embodiments, if the vacuum level physical signal reaches the pumping threshold, and the time t2 exceeds the set time, the VCU unit considers that the vacuum assist system is abnormal and reports a fault, and at the same time, the VCU unit instructs the vacuum pump to continue pumping the vacuum tank.
In some embodiments, the judging whether the air extraction threshold is reached, whether the air stop threshold is reached, and whether the air stop threshold is in the alarm range is performed on the premise that the signal acquisition processing module of the VCU unit does not receive the pedal information of the brake pedal.
In some embodiments, when the signal acquisition processing module of the VCU unit receives pedal information of the brake pedal, both the t1 timer and the t2 timer are set to zero.
In summary, the safety alarm device and the method of the vacuum assistance system of the new energy commercial vehicle have the following beneficial effects: according to the scheme, on the basis of the safety alarm device of the vacuum assistance system in the prior art, the brake pedal and the timer are matched with the VCU unit, and the safety requirement of the vacuum assistance system is combined with the new energy commercial vehicle, and the timing result of the vacuum degree signal, the brake pedal signal and the timer is used for distinguishing whether the vacuum degree is caused by normal use or caused by abnormal faults when the vacuum degree is low, so that on one hand, the abnormal problem of the assistance system can be correctly identified, the driver is informed in advance, hidden risks are checked, and on the other hand, the practicability and economic benefits of the vacuum assistance system can be improved. The method has the advantages of simple implementation and better guarantee of the stability of the brake system.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. The utility model provides a new forms of energy commercial car vacuum assist system's safety alarm method, its safety alarm device who uses new forms of energy commercial car vacuum assist system, its characterized in that, safety alarm device includes:
the VCU comprises a signal acquisition processing module;
the VCU unit is in data connection with the VCU unit, and the VCU unit collects and processes vacuum degree signals of the vacuum tank through the signal acquisition and processing module;
a vacuum pump in communication with the vacuum tank for evacuating the vacuum tank, the vacuum pump also being in data connection with the VCU unit and receiving a start-up or shut-down command from the VCU unit; and
a brake pedal which is in data connection with the VCU unit, wherein the VCU unit collects and processes pedal signals of the brake pedal through the signal collecting and processing module;
the VCU unit also comprises a timer, which is used for judging whether the vacuum power-assisted system is in an abnormal state or not with the timing duration of the signals acquired and processed by the signal acquisition and processing module;
the safety alarm method comprises the following steps:
after the whole vehicle is electrified, firstly judging whether the VCU unit reaches an air extraction threshold value according to the vacuum degree physical signal quantity of the vacuum tank acquired by the signal acquisition processing module;
if the vacuum degree physical signal quantity reaches the air extraction threshold value, the VCU unit instructs the vacuum pump to vacuumize the vacuum tank, and the timer starts t1 timing;
the VCU unit continuously judges whether the vacuum degree physical signal quantity reaches a shutdown threshold value; and
if the shutdown threshold is reached, the VCU unit instructs the vacuum pump to stop pumping, and the timer starts t 2;
repeating the steps circularly;
if the vacuum degree physical signal quantity does not reach the shutdown threshold value, the VCU unit continuously judges whether the t1 timing exceeds a set time;
if the t1 timing exceeds the set time, the VCU unit instructs the vacuum pump to stop pumping;
the VCU unit continuously judges whether the vacuum degree physical signal quantity is in an alarm range;
if the vacuum degree physical signal quantity is in the alarm range, the VCU unit considers that the vacuum power assisting system is abnormal and reports faults; and
if the vacuum degree physical signal quantity is not in the alarm range, the VCU unit returns to monitor and judges whether the vacuum degree physical signal quantity reaches an air extraction threshold value or not;
repeating the steps circularly;
wherein if the t1 timing does not exceed the set time, the VCU unit instructs the vacuum pump to continue to evacuate the vacuum tank;
if the vacuum degree physical signal quantity reaches the air extraction threshold value and the t2 timing exceeds the set time, the VCU unit considers that the vacuum power assisting system is abnormal and reports faults, and meanwhile, the VCU unit instructs the vacuum pump to continue vacuumizing the vacuum tank;
the method comprises the steps of judging whether an air extraction threshold value is reached, judging whether an air stopping threshold value is reached and judging whether the air extraction threshold value is in an alarm range is carried out on the premise that a signal acquisition processing module of the VCU unit does not receive pedal information of the brake pedal;
and when the signal acquisition processing module of the VCU unit receives pedal information of the brake pedal, the t1 timing and the t2 timing are set to zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529327.2A CN115092107B (en) | 2022-05-16 | 2022-05-16 | Safety alarm device and method for vacuum power-assisted system of new energy commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529327.2A CN115092107B (en) | 2022-05-16 | 2022-05-16 | Safety alarm device and method for vacuum power-assisted system of new energy commercial vehicle |
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| Publication Number | Publication Date |
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| CN115092107A CN115092107A (en) | 2022-09-23 |
| CN115092107B true CN115092107B (en) | 2023-11-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791980A (en) * | 2010-02-11 | 2010-08-04 | 中国汽车技术研究中心 | Electric vacuum servo device control strategy of electric car brake |
| CN110901622A (en) * | 2018-09-14 | 2020-03-24 | 海马新能源汽车有限公司 | Vacuum pump control method and device |
| CN111348022A (en) * | 2019-12-31 | 2020-06-30 | 昆山市兴利车辆科技配套有限公司 | Automobile vacuum boosting system and method thereof |
| WO2022048644A1 (en) * | 2020-09-03 | 2022-03-10 | 长城汽车股份有限公司 | Method and apparatus for determining vacuum degree threshold value, and medium, program and electronic device |
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2022
- 2022-05-16 CN CN202210529327.2A patent/CN115092107B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791980A (en) * | 2010-02-11 | 2010-08-04 | 中国汽车技术研究中心 | Electric vacuum servo device control strategy of electric car brake |
| CN110901622A (en) * | 2018-09-14 | 2020-03-24 | 海马新能源汽车有限公司 | Vacuum pump control method and device |
| CN111348022A (en) * | 2019-12-31 | 2020-06-30 | 昆山市兴利车辆科技配套有限公司 | Automobile vacuum boosting system and method thereof |
| WO2022048644A1 (en) * | 2020-09-03 | 2022-03-10 | 长城汽车股份有限公司 | Method and apparatus for determining vacuum degree threshold value, and medium, program and electronic device |
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| CN115092107A (en) | 2022-09-23 |
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