CN105351755A - Natural gas leakage detecting method of automobile gas supply system - Google Patents
Natural gas leakage detecting method of automobile gas supply system Download PDFInfo
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- CN105351755A CN105351755A CN201510717079.4A CN201510717079A CN105351755A CN 105351755 A CN105351755 A CN 105351755A CN 201510717079 A CN201510717079 A CN 201510717079A CN 105351755 A CN105351755 A CN 105351755A
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Abstract
The invention discloses a natural gas leakage detecting method of an automobile gas supply system. The natural gas leakage detecting method comprises detection in a stopping state and detection in a running state. Firstly, in the stopping state, high-pressure and low-pressure leakage evaluation values are calculated through the pressure and temperature of a high-pressure pipeline, then high-pressure and low-pressure system leakage evaluation is carried out, then a result is displayed on a display screen for leakage alarming, and whether gas leakage happens or not is determined before a driver starts an automobile; and secondly, in the running process, whether natural gas in a gas cylinder and a gas pipe leaks or not is judged through a methane detection sensor, then a result is displayed on the display screen, and leakage alarming is carried out so that the driver can be reminded of doing gas leakage checking. According to the natural gas leakage detecting method, design is novel; efficient and accurate gas leakage detection is carried out on the automobile gas supply system in real time; leakage alarming precision is high; and the application range is wide.
Description
Technical field
The present invention relates to a kind of automobile air supply system natural gas leaking detecting method, belong to gas-fueled vehicles air supply system technical field.
Background technique
Along with " GB7258-2012 Motor Vehicle safe and technical specification " and " installation requirement of GB19239-2013 gas combustion automobile special purpose device " force the enforcement of standard, gas-fueled vehicles must carry out gas supply system Security detection, simultaneously when combustion gas occurs to leak, warn to driver and the member that rides with acoustooptic alarm form.Whether gas combustion automobile air supply system security relationship can be run by normal safe, so accurately, reliably air supply system safety detection is extremely urgent to gas burning system.
At present, existing automobile air supply system safety detecting method, is only limitted in vehicle traveling process the judgement whether combustion gas leaks.This kind of method has following defect:
1, judge the operating range of leakage only when driving, make the using scope of natural gas leaking Alarm Detector more single.
Whether cannot detect when 2, stopping and leak gas, when causing automobile starting, driver cannot obtain gas leakage warning, has potential safety hazard.
3, air supply system No leakage can not be detected completely, because some pipeline or joint are in air circulation preferably in environment, simultaneously because the density ratio air of rock gas is little, if a small amount of natural gas leaking in atmosphere, its concentration is extremely low, and methane transducer is difficult to detect accurately.
Summary of the invention
For above-mentioned deficiency of the prior art, the present invention aims to provide a kind of automobile air supply system natural gas leaking detecting method, and it is novel in design, carries out gas leakage efficiently and accurately in real time detect automobile air supply system, leakage alarm precision is high, applied range.
To achieve these goals, technological scheme of the present invention: a kind of automobile air supply system natural gas leaking detecting method, it detects under comprising vehicle stop state and detects under travelling state, its concrete detecting method following steps:
Under A, vehicle stop state:
A1, adopt respectively on automobile to be measured pressure transducer to gas cylinder be connected tracheae and carry out real-time pressure monitoring, ECU gathers this Monitoring Data and is passed to diagnostic module analysis, this diagnostic module compared with this Monitoring Data, and will tentatively judge that data are sent to Leak testtion module according to the threshold pressure differential prestored;
A2, described Leak testtion module, by tentatively judging that data carry out high-pressure system Leak testtion module and low service system Leak testtion module analysis, judge whether to there is high-pressure leakage or low-pressure leak;
Further, described A2 step comprises:
A2.1, tentatively judge that data comprise the air supply system data of historical failure data and Real-time Collection, if there is historical failure information untreated, faut detection is carried out in stopping, carrying out failture evacuation by user, if there is no historical failure information, perform A2.2;
A2.2, from the air supply system data of Real-time Collection, obtain storage pressure, temperature data, gas rail pressure, temperature data, judge flame-out front storage pressure threshold value, if higher than threshold value for carrying out the diagnosis of high-pressure system Leak testtion, reveal assessed value calculating by high pressure to carry out judging whether to be greater than predefined value, if be greater than predefined value, be judged as high-pressure system leakage failure, report to the police, if be not greater than predefined value to perform A2.3;
If A2.3 is not greater than predefined value carry out the diagnosis of low service system Leak testtion, reveal assessed value calculating by low pressure to carry out judging whether to be less than predefined value lower limit, if be less than predefined value lower limit, be judged as low service system leakage failure, if be not less than predefined value lower limit, judge whether to be greater than the predefined value upper limit, if be greater than predefined value lower limit to be less than predefined value, be judged as low service system leakage failure, pre-set the upper limit if be not more than, stop diagnosis fault-free.
Under B, travelling state:
B1, respectively employing sensor commute occur that methane concentration Real-Time Monitoring is carried out in leak position, and ECU gathers this Monitoring Data and inputs to diagnostic module analysis, and this diagnostic module compares according to the diagnostic threshold prestored and this Monitoring Data;
If B2 Monitoring Data is in this threshold pressure differential, processing result is converted to normal signal transmission on display screen by ECU, shows No leakage; If Monitoring Data is in outside this threshold pressure differential, ECU converts processing result to alarm signal and transfers on display screen, shows to exist to leak.
Further, in described B2 step, exist as shown and leak, ECU is reported to the police by alarm module; In described steps A 2, as there is high-pressure leakage or low-pressure leak, ECU is reported to the police by alarm module.
Further, described alarm module includes gas alarm lamp and buzzer, and before warning, ECU controls base driving chip to be carried out short, short circuit diagnosis to this gas alarm lamp, buzzer, and shown by display screen by diagnostic result.
Further, before steps A 1, step B1, ECU carries out confession electro-detection according to system voltage to each sensor, as detected normal then continuation steps A 1, step B1, as abnormal in monitored, and testing result is shown by display screen.
Beneficial effect of the present invention: novel in design, carry out gas leakage efficiently and accurately to automobile air supply system in real time to detect, to ensure the gas leakage monitoring whenever can carrying out efficiently and accurately, directly effectively judge whether automobile air supply system in running process or docking process exists gas leakage, leakage alarm precision is high, applied range.
Accompanying drawing explanation
Fig. 1 is that the systems axiol-ogy under vehicle stop state of the present invention leaks schematic diagram;
Fig. 2 is that the systems axiol-ogy under travelling state of the present invention leaks schematic diagram.
Embodiment
The present invention is further described below in conjunction with specific embodiment and accompanying drawing.
One automobile air supply system natural gas leaking detecting method as described in Fig. 1,2, it detects under comprising vehicle stop state and detects under travelling state, its concrete detecting method following steps:
Under A, vehicle stop state:
A1, adopt respectively on automobile to be measured pressure transducer to gas cylinder be connected tracheae and carry out real-time pressure monitoring, ECU gathers this Monitoring Data and is passed to diagnostic module analysis, this diagnostic module compared with this Monitoring Data, and will tentatively judge that data are sent to Leak testtion module according to the threshold pressure differential prestored;
A2, described Leak testtion module, by tentatively judging that data carry out high-pressure system Leak testtion module and low service system Leak testtion module analysis, judge whether to there is high-pressure leakage or low-pressure leak;
Under B, travelling state:
B1, respectively employing sensor commute occur that methane concentration Real-Time Monitoring is carried out in leak position, and ECU gathers this Monitoring Data and inputs to diagnostic module analysis, and this diagnostic module compares according to the diagnostic threshold prestored and this Monitoring Data;
If B2 Monitoring Data is in this threshold pressure differential, processing result is converted to normal signal transmission on display screen by ECU, shows No leakage; If Monitoring Data is in outside this threshold pressure differential, ECU converts processing result to alarm signal and transfers on display screen, shows to exist to leak.
This invention is novel in design, carry out gas leakage efficiently and accurately to automobile air supply system in real time to detect, to ensure the gas leakage monitoring whenever can carrying out efficiently and accurately, directly effectively judge whether automobile air supply system in running process or docking process exists gas leakage, leakage alarm precision is high, applied range.
A2 step includes:
A2.1, tentatively judge that data comprise the air supply system data of historical failure data and Real-time Collection, if there is historical failure information untreated, faut detection is carried out in stopping, carrying out failture evacuation by user, if there is no historical failure information, perform A2.2;
A2.2, from the air supply system data of Real-time Collection, obtain storage pressure, temperature data, gas rail pressure, temperature data, judge flame-out front storage pressure threshold value, if higher than threshold value for carrying out the diagnosis of high-pressure system Leak testtion, reveal assessed value calculating by high pressure to carry out judging whether to be greater than predefined value, if be greater than predefined value, be judged as high-pressure system leakage failure, report to the police, if be not greater than predefined value to perform A2.3;
If A2.3 is not greater than predefined value carry out the diagnosis of low service system Leak testtion, reveal assessed value calculating by low pressure to carry out judging whether to be less than predefined value lower limit, if be less than predefined value lower limit, be judged as low service system leakage failure, if be not less than predefined value lower limit, judge whether to be greater than the predefined value upper limit, if be greater than predefined value lower limit to be less than predefined value, be judged as low service system leakage failure, pre-set the upper limit if be not more than, stop diagnosis fault-free.
In A2 step, as there is high-pressure leakage or low-pressure leak, ECU is reported to the police by alarm module; In step B2, exist as shown and leak, ECU is reported to the police by alarm module.Alarm module includes gas alarm lamp and buzzer, and before warning, ECU controls base driving chip to be carried out short, short circuit diagnosis to this gas alarm lamp, buzzer, and shown by display screen by diagnostic result.
Finally, before steps A 1, step B1, ECU carries out confession electro-detection according to system voltage to each sensor, as detected normal then continuation steps A 1, step B1, as abnormal in monitored, and testing result is shown by display screen.
Above the technological scheme that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth the principle of the embodiment of the present invention and mode of execution, the explanation of above embodiment is only applicable to the principle helping to understand the embodiment of the present invention; Meanwhile, for one of ordinary skill in the art, according to the embodiment of the present invention, embodiment and application area all will change, and in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. an automobile air supply system natural gas leaking detecting method, is characterized in that, detects and detect under travelling state, its concrete detecting method following steps under comprising vehicle stop state:
Under A, vehicle stop state:
A1, adopt respectively on automobile to be measured pressure transducer to gas cylinder be connected tracheae and carry out real-time pressure monitoring, ECU gathers this Monitoring Data and is passed to diagnostic module analysis, this diagnostic module compared with this Monitoring Data, and will tentatively judge that data are sent to Leak testtion module according to the threshold pressure differential prestored;
A2, described Leak testtion module, by tentatively judging that data carry out high-pressure system Leak testtion module and low service system Leak testtion module analysis, judge whether to there is high-pressure leakage or low-pressure leak;
Under B, travelling state:
B1, respectively employing sensor commute occur that methane concentration Real-Time Monitoring is carried out in leak position, and ECU gathers this Monitoring Data and inputs to diagnostic module analysis, and this diagnostic module compares according to the diagnostic threshold prestored and this Monitoring Data;
If B2 Monitoring Data is in this threshold pressure differential, processing result is converted to normal signal transmission on display screen by ECU, shows No leakage; If Monitoring Data is in outside this threshold pressure differential, ECU converts processing result to alarm signal and transfers on display screen, shows to exist to leak.
2. a kind of automobile air supply system natural gas leaking detecting method according to claim 1, is characterized in that: described A2 step comprises:
A2.1, tentatively judge that data comprise the air supply system data of historical failure data and Real-time Collection, if there is historical failure information untreated, faut detection is carried out in stopping, carrying out failture evacuation by user, if there is no historical failure information, perform A2.2;
A2.2, from the air supply system data of Real-time Collection, obtain storage pressure, temperature data, gas rail pressure, temperature data, judge flame-out front storage pressure threshold value, if higher than threshold value for carrying out the diagnosis of high-pressure system Leak testtion, reveal assessed value calculating by high pressure to carry out judging whether to be greater than predefined value, if be greater than predefined value, be judged as high-pressure system leakage failure, report to the police, if be not greater than predefined value to perform A2.3;
If A2.3 is not greater than predefined value carry out the diagnosis of low service system Leak testtion, reveal assessed value calculating by low pressure to carry out judging whether to be less than predefined value lower limit, if be less than predefined value lower limit, be judged as low service system leakage failure, if be not less than predefined value lower limit, judge whether to be greater than the predefined value upper limit, if be greater than predefined value lower limit to be less than predefined value, be judged as low service system leakage failure, pre-set the upper limit if be not more than, stop diagnosis fault-free.
3. a kind of automobile air supply system natural gas leaking detecting method according to claim 1, is characterized in that: in described B2 step, and exist as shown and leak, ECU is reported to the police by alarm module; In described steps A 2, as there is high-pressure leakage or low-pressure leak, ECU is reported to the police by alarm module.
4. a kind of automobile air supply system natural gas leaking detecting method according to claim 1, it is characterized in that: described alarm module includes gas alarm lamp and buzzer, before warning, ECU controls base driving chip to be carried out short, short circuit diagnosis to this gas alarm lamp, buzzer, and is shown by display screen by diagnostic result.
5. a kind of automobile air supply system natural gas leaking detecting method according to claim 1, it is characterized in that: before steps A 1, step B1, ECU carries out confession electro-detection according to system voltage to each sensor, as detected normal then continuation steps A 1, step B1, as abnormal in monitored, testing result is shown by display screen.
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| CN201510717079.4A CN105351755A (en) | 2015-10-30 | 2015-10-30 | Natural gas leakage detecting method of automobile gas supply system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888908A (en) * | 2016-04-08 | 2016-08-24 | 中国第汽车股份有限公司 | Natural gas engine gas track leakage detection method |
| CN106015935A (en) * | 2016-06-27 | 2016-10-12 | 宁波奉天海供氧净化成套设备有限公司 | Medical gas system used for operating room and maintaining method |
| CN112902026A (en) * | 2021-01-18 | 2021-06-04 | 南京信息工程大学 | Method for detecting natural gas leakage of natural gas automobile gas supply system |
| CN113090953A (en) * | 2019-12-23 | 2021-07-09 | 未势能源科技有限公司 | Method and device for detecting gas leakage in gas supply system, storage medium and vehicle |
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| CN2751291Y (en) * | 2004-11-15 | 2006-01-11 | 西安交通大学 | Natural gas vehicle leakage monitoring device |
| CN102518947A (en) * | 2011-12-06 | 2012-06-27 | 北京大方科技有限责任公司 | Real-time monitoring method for urban pipeline network leakage |
| CN104266804A (en) * | 2014-10-17 | 2015-01-07 | 中国汽车工程研究院股份有限公司 | Security detection system and method for gas supply system of dual-fuel automobile |
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2015
- 2015-10-30 CN CN201510717079.4A patent/CN105351755A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2751291Y (en) * | 2004-11-15 | 2006-01-11 | 西安交通大学 | Natural gas vehicle leakage monitoring device |
| CN102518947A (en) * | 2011-12-06 | 2012-06-27 | 北京大方科技有限责任公司 | Real-time monitoring method for urban pipeline network leakage |
| CN104266804A (en) * | 2014-10-17 | 2015-01-07 | 中国汽车工程研究院股份有限公司 | Security detection system and method for gas supply system of dual-fuel automobile |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888908A (en) * | 2016-04-08 | 2016-08-24 | 中国第汽车股份有限公司 | Natural gas engine gas track leakage detection method |
| CN106015935A (en) * | 2016-06-27 | 2016-10-12 | 宁波奉天海供氧净化成套设备有限公司 | Medical gas system used for operating room and maintaining method |
| CN106015935B (en) * | 2016-06-27 | 2019-01-08 | 宁波奉天海供氧净化成套设备有限公司 | A kind of medical oxygen supply system and maintaining method for operating room |
| CN113090953A (en) * | 2019-12-23 | 2021-07-09 | 未势能源科技有限公司 | Method and device for detecting gas leakage in gas supply system, storage medium and vehicle |
| CN112902026A (en) * | 2021-01-18 | 2021-06-04 | 南京信息工程大学 | Method for detecting natural gas leakage of natural gas automobile gas supply system |
| CN112902026B (en) * | 2021-01-18 | 2022-03-11 | 南京信息工程大学 | Method for detecting natural gas leakage of natural gas automobile gas supply system |
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