CN113803180A - Method for detecting rail pressure build-up failure fault of engine - Google Patents
Method for detecting rail pressure build-up failure fault of engine Download PDFInfo
- Publication number
- CN113803180A CN113803180A CN202010541294.4A CN202010541294A CN113803180A CN 113803180 A CN113803180 A CN 113803180A CN 202010541294 A CN202010541294 A CN 202010541294A CN 113803180 A CN113803180 A CN 113803180A
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- Prior art keywords
- pcv valve
- pressure build
- judging
- rail pressure
- time
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Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009825 accumulation Methods 0.000 claims abstract description 8
- 238000013022 venting Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The invention discloses a method for detecting a rail pressure build-up failure fault of an engine, which comprises the following steps: s1: waiting for a pressure build-up process: timing the time of pressure accumulation; s2: judging the pressure accumulation time: judging whether the voltage build-up of the current engine is finished; s3: the PCV valve is gradually closed: gradually reducing the duty ratio of the PCV valve according to a certain rate, and forcibly closing the PCV valve; s4: judging the duty ratio of the PCV valve: determining whether the PCV valve duty cycle has decreased to a target value; s5: PCV valve opening exhaust function: at the moment, the oil mass unit keeps a certain driving duty ratio, oil is supplied by the maximum oil mass, and the PCV valve opens the exhaust function by continuously opening and closing. S6: and (3) judging the exhaust time: judging whether the exhaust time reaches a threshold value; s7: and (3) fault reporting: if the rail pressure build-up is not successfully assisted through the air exhaust function of the PCV valve within a certain time, the rail pressure build-up is considered to be failed, and the method improves the credibility of rail pressure build-up failure fault judgment.
Description
Technical Field
The invention belongs to the field of vehicle control, and particularly relates to a method for detecting a rail pressure build-up failure fault under coupling control of a flow unit and PCV.
Background
The engine is an indispensable power source in production and life, and in order to improve the performance of the engine and improve the problem of emission pollution, the high-pressure common rail electric control technology is widely applied. In the OBD fault diagnosis, it is important to perform a relevant diagnosis of the rail pressure.
In the prior art, a method for judging rail pressure build-up failure through the build-up time or the rail pressure value is available, but the method is too single and simple and cannot well ensure the credibility of the judgment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for detecting the rail pressure build-up failure fault of an engine.
The method and the device aim at the pressure build-up failure fault which may occur in the starting process of the engine, and detect the condition of the rail pressure build-up failure based on the flow unit and PCV coupling control.
The purpose of the invention can be realized by the following technical scheme:
a method for detecting a rail pressure build-up failure fault of an engine comprises the following steps:
s1: waiting for a pressure build-up process: timing the time of pressure accumulation;
s2: judging the pressure accumulation time: judging whether the voltage build-up of the current engine is finished, if so, carrying out the next step, and if not, returning to the previous step;
s3: the PCV valve is gradually closed: gradually reducing the duty ratio of the PCV valve according to a certain rate, and forcibly closing the PCV valve;
s4: judging the duty ratio of the PCV valve: judging whether the duty ratio of the PCV valve is reduced to a target value or not, if so, carrying out the next step, and if not, returning to the previous step;
s5: PCV valve opening exhaust function: at the moment, the oil mass unit keeps a certain driving duty ratio, oil is supplied by the maximum oil mass, and the PCV valve opens the exhaust function by continuously opening and closing.
S6: and (3) judging the exhaust time: judging whether the exhaust time reaches a threshold value, if so, carrying out the next step, and if not, returning to the previous step;
s7: and (3) fault reporting: if the rail pressure build-up is not successfully assisted by the venting function of the PCV valve within a certain time, the rail pressure build-up is deemed to have failed.
The invention has the beneficial effects that:
the method improves the credibility of rail pressure build-up failure fault judgment.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical scheme of the invention is further described by combining the attached drawings:
during the starting process of the engine, after a period of time, the PCV valve is gradually closed, then the exhaust function is started, and if the exhaust time exceeds a reasonable range and the pressure is not successfully built, the rail pressure building failure fault is considered to exist.
A method for detecting a rail pressure build-up failure fault of an engine comprises the following steps:
s1: waiting for a pressure build-up process: timing the time of pressure accumulation;
s2: judging the pressure accumulation time: judging whether the voltage build-up of the current engine is finished, if so, carrying out the next step, and if not, returning to the previous step;
s3: the PCV valve is gradually closed: gradually reducing the duty ratio of the PCV valve according to a certain rate, and forcibly closing the PCV valve;
s4: judging the duty ratio of the PCV valve: judging whether the duty ratio of the PCV valve is reduced to a target value or not, if so, carrying out the next step, and if not, returning to the previous step;
s5: PCV valve opening exhaust function: at the moment, the oil mass unit keeps a certain driving duty ratio, oil is supplied by the maximum oil mass, and the PCV valve opens the exhaust function by continuously opening and closing.
S6: and (3) judging the exhaust time: judging whether the exhaust time reaches a threshold value, if so, carrying out the next step, and if not, returning to the previous step;
s7: and (3) fault reporting: if the rail pressure build-up is not successfully assisted by the venting function of the PCV valve within a certain time, the rail pressure build-up is deemed to have failed.
And through the coupling control of the flow unit and the PCV, judging whether the exhaust function of the PCV valve helps the rail pressure build-up success within the specified time, thereby judging the failure of the rail pressure build-up failure.
Finally, it should be noted that:
the method may be carried out and its application may be carried out by those skilled in the art with reference to the disclosure herein, and it is expressly intended that all such alternatives and modifications as would be apparent to those skilled in the art are deemed to be included within the invention. While the method and application of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the method and application of the invention as described herein may be made and equivalents employed without departing from the spirit and scope of the invention.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the true spirit and scope of the invention.
Claims (1)
1. A method for detecting a rail pressure build-up failure fault of an engine is characterized by comprising the following steps: the method comprises the following steps:
s1: waiting for a pressure build-up process: timing the time of pressure accumulation;
s2: judging the pressure accumulation time: judging whether the voltage build-up of the current engine is finished, if so, carrying out the next step, and if not, returning to the previous step;
s3: the PCV valve is gradually closed: gradually reducing the duty ratio of the PCV valve according to a certain rate, and forcibly closing the PCV valve;
s4: judging the duty ratio of the PCV valve: judging whether the duty ratio of the PCV valve is reduced to a target value or not, if so, carrying out the next step, and if not, returning to the previous step;
s5: PCV valve opening exhaust function: at the moment, the oil mass unit keeps a certain driving duty ratio, oil is supplied by the maximum oil mass, and the PCV valve opens the exhaust function by continuously opening and closing.
S6: and (3) judging the exhaust time: judging whether the exhaust time reaches a threshold value, if so, carrying out the next step, and if not, returning to the previous step;
s7: and (3) fault reporting: if the rail pressure build-up is not successfully assisted by the venting function of the PCV valve within a certain time, the rail pressure build-up is deemed to have failed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010541294.4A CN113803180B (en) | 2020-06-15 | 2020-06-15 | Method for detecting failure fault of rail pressure building of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010541294.4A CN113803180B (en) | 2020-06-15 | 2020-06-15 | Method for detecting failure fault of rail pressure building of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113803180A true CN113803180A (en) | 2021-12-17 |
| CN113803180B CN113803180B (en) | 2023-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010541294.4A Active CN113803180B (en) | 2020-06-15 | 2020-06-15 | Method for detecting failure fault of rail pressure building of engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN113803180B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1113601A (en) * | 1997-06-19 | 1999-01-19 | Toyota Motor Corp | Accumulator fuel injection device for internal combustion engine |
| JP2011169280A (en) * | 2010-02-19 | 2011-09-01 | Bosch Corp | Common-rail type fuel injection controller and pressure control valve driving control method in the same |
| CN103075286A (en) * | 2012-12-27 | 2013-05-01 | 潍柴动力股份有限公司 | Method and device for detecting fault of high-pressure oil pump incapable of establishing low rail pressure |
| CN103883409A (en) * | 2014-03-14 | 2014-06-25 | 潍柴动力股份有限公司 | Double-actuator switching control method and device |
| US20150153242A1 (en) * | 2013-10-29 | 2015-06-04 | Robert Bosch Gmbh | Method for monitoring a pressure sensor of a fuel injection system, especially of a motor vehicle |
| JP2015169135A (en) * | 2014-03-07 | 2015-09-28 | 株式会社デンソー | fuel property detecting device |
-
2020
- 2020-06-15 CN CN202010541294.4A patent/CN113803180B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1113601A (en) * | 1997-06-19 | 1999-01-19 | Toyota Motor Corp | Accumulator fuel injection device for internal combustion engine |
| JP2011169280A (en) * | 2010-02-19 | 2011-09-01 | Bosch Corp | Common-rail type fuel injection controller and pressure control valve driving control method in the same |
| CN103075286A (en) * | 2012-12-27 | 2013-05-01 | 潍柴动力股份有限公司 | Method and device for detecting fault of high-pressure oil pump incapable of establishing low rail pressure |
| US20150153242A1 (en) * | 2013-10-29 | 2015-06-04 | Robert Bosch Gmbh | Method for monitoring a pressure sensor of a fuel injection system, especially of a motor vehicle |
| JP2015169135A (en) * | 2014-03-07 | 2015-09-28 | 株式会社デンソー | fuel property detecting device |
| CN103883409A (en) * | 2014-03-14 | 2014-06-25 | 潍柴动力股份有限公司 | Double-actuator switching control method and device |
Non-Patent Citations (1)
| Title |
|---|
| 李长英;: "柴油机轨压无法建立的故障分析" * |
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| CN113803180B (en) | 2023-08-29 |
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Address after: 214000 2-1205, Tian'an smart city, No. 228, Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province Patentee after: Zhuopin Intelligent Technology Wuxi Co.,Ltd. Country or region after: China Address before: 214000 2-1205, Tian'an smart city, No. 228, Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province Patentee before: ZHUO PIN INTELLIGENT TECHNOLOGY WUXI CO.,LTD. Country or region before: China |
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