CN114876690B - Fault detection device and fault detection method for oil sprayer - Google Patents
Fault detection device and fault detection method for oil sprayer Download PDFInfo
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- CN114876690B CN114876690B CN202210683842.6A CN202210683842A CN114876690B CN 114876690 B CN114876690 B CN 114876690B CN 202210683842 A CN202210683842 A CN 202210683842A CN 114876690 B CN114876690 B CN 114876690B
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- fuel injector
- oil
- oil pressure
- hydraulic pump
- tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
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- 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
Abstract
The invention belongs to the technical field of fault detection, and discloses a fault detection device and a fault detection method for an oil sprayer. The fault detection device of the fuel injector comprises a detection system and a controller, wherein the detection system comprises a hydraulic pump, a pressure accumulation box and a pressure sensor, the hydraulic pump is communicated with the pressure accumulation box, the pressure accumulation box is communicated with the fuel injector, and the pressure sensor is arranged in the pressure accumulation box and is used for monitoring the oil pressure of the pressure accumulation box; the controller is electrically connected with the pressure sensor and the oil sprayer, and the controller can control the oil sprayer to spray oil according to the electric signal of the pressure sensor. The fault detection device for the fuel injector is simple in structure, high in detection accuracy and convenient to operate.
Description
Technical Field
The invention relates to the technical field of fault detection, in particular to a fault detection device and a fault detection method for an oil sprayer.
Background
The high-pressure common rail technology has become an important development direction of an engine as a fuel injection technology with high efficiency, low power consumption and light emission. The electric control fuel injector is one of the most complex and important components in the high-pressure common rail fuel injection system, and the fuel in the high-pressure common rail pipe is injected into the combustion chamber at the optimal fuel injection timing, fuel injection quantity and fuel injection rate by controlling the switch of the electromagnetic valve according to the instruction of the controller. Once the oil injector fails, the safety and the reliability of the diesel engine are directly affected. The rapid and accurate fault diagnosis can improve the performance of the fuel injector, reduce the maintenance cost and has important engineering value.
In the prior art, whether the fuel injector breaks down or not is judged through the volume change of the fuel in the fuel tank before and after the fuel injection of the fuel injector of the engine system, but a detection device for specially detecting whether the fuel injector breaks down or not is not available in the prior art.
Disclosure of Invention
The invention aims to provide a fault detection device and a fault detection method for an oil sprayer, which are used for solving the problem that a detection device for specially detecting whether the oil sprayer is faulty or not is not available in the prior art.
To achieve the purpose, the invention adopts the following technical scheme:
an injector failure detection apparatus, comprising:
the detection system comprises a hydraulic pump, an accumulator tank and a pressure sensor, wherein the hydraulic pump is communicated with the accumulator tank, the accumulator tank is communicated with the fuel injector, and the pressure sensor is arranged in the accumulator tank and is used for monitoring the oil pressure of the accumulator tank;
the controller is electrically connected with the pressure sensor and the oil sprayer, and the controller can control the oil sprayer to spray oil according to the electric signal of the pressure sensor.
Preferably, the detection system further comprises a pressure relief valve, and the pressure relief valve is communicated with the pressure accumulation tank.
Preferably, the fault detection device of the fuel injector further comprises a fuel tank, the hydraulic pump is further communicated with the fuel tank, and the pressure relief valve is further communicated with the fuel tank.
Preferably, the hydraulic pump is an electric pump.
Preferably, the fault detection device of the fuel injector further comprises an alarm, and the alarm is electrically connected with the controller.
The fault detection method of the fuel injector is applied to the fault detection device of the fuel injector, and comprises the following steps:
measuring whether the resistance of the fuel injector is in a set resistance value range;
if the resistance of the oil sprayer is in the range of the set resistance value, controlling the hydraulic pump to pump oil to the pressure accumulation box;
judging whether the oil pressure value of the pressure accumulation box is larger than or equal to a set oil pressure value;
and if the oil pressure value of the pressure accumulation tank is larger than or equal to the set oil pressure value, controlling the hydraulic pump to stop pumping oil, and judging whether the oil injector fails according to the descending speed of the oil pressure of the pressure accumulation tank.
Preferably, if the resistance value of the fuel injector is not within the set resistance value range, the abnormal resistance of the fuel injector is indicated, and the fuel injector is failed.
Preferably, if the oil pressure value of the accumulator is smaller than the set oil pressure value, judging whether the duration of the pumping of the hydraulic pump is longer than or equal to the set duration;
and if the duration of the oil pumping of the hydraulic pump is longer than or equal to the set duration, indicating that the detection system is faulty.
Preferably, the specific step of judging whether the fuel injector is faulty according to the rate of decrease of the oil pressure of the accumulator tank includes:
electrifying the oil injector, and controlling the oil injector to spray oil;
judging whether the descent speed is within a set descent speed range;
if the descending speed is within the set descending speed range, the fuel injector is normal;
and if the descending speed is not in the set descending speed range, indicating that the fuel injector is in fault.
Preferably, the detection system further includes a relief valve, and if the oil pressure value of the accumulator is greater than the set oil pressure value, the relief valve is operated until the oil pressure value in the accumulator is equal to the set oil pressure value.
The invention has the beneficial effects that:
the invention aims to provide a fault detection device and a fault detection method for an oil sprayer. The fault detection device for the oil injector comprises a detection system and a controller, when whether the oil injector is required to be detected to be faulty or not, the hydraulic pump is controlled to pump hydraulic oil into the pressure accumulation box until the oil pressure value of the oil in the pressure accumulation box is larger than or equal to a set oil pressure value, at the moment, the hydraulic pump is controlled to stop pumping the hydraulic oil, the oil injector is electrified, the controller controls the oil injector to inject oil, whether the falling speed of the oil pressure in the pressure accumulation box is within a set falling speed range after the oil injector begins to inject oil is detected, if the falling speed of the oil pressure in the pressure accumulation box is within the set falling speed range after the oil injector injects oil, the fault detection device for the oil injector is simple in structure, high in detection precision and convenient to operate.
Drawings
FIG. 1 is a schematic diagram of a fault detection device for an injector according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for fault detection of an injector according to an embodiment of the present invention.
In the figure:
100. an oil injector;
11. a hydraulic pump; 12. a pressure accumulation tank; 13. a pressure sensor; 14. a first pipeline; 15. a second pipeline; 16. and a pressure release valve.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The invention provides a fault detection device of an oil sprayer, wherein the fault detection device of the oil sprayer comprises a detection system and a controller, as shown in fig. 1, the detection system comprises a hydraulic pump 11, an accumulation tank 12 and a pressure sensor 13, the hydraulic pump 11 is communicated with the accumulation tank 12, the accumulation tank 12 is communicated with the oil sprayer 100, and the pressure sensor 13 is arranged on the accumulation tank 12 and is used for monitoring the oil pressure of the accumulation tank 12; the controller is electrically connected with the pressure sensor 13 and the fuel injector 100, and the controller can control the fuel injector 100 to spray fuel according to the electric signal of the pressure sensor 13. Specifically, the hydraulic pump 11 is communicated with the accumulator tank 12 through the first pipeline 14, the accumulator tank 12 and the fuel injector 100 are communicated through the second pipeline 15, when whether the fuel injector 100 is required to be detected to be failed, the hydraulic pump 11 is controlled to pump hydraulic oil into the accumulator tank 12 until the oil pressure value of the oil in the accumulator tank 12 is larger than or equal to a set oil pressure value, at the moment, the hydraulic pump 11 is controlled to stop pumping the hydraulic oil, the fuel injector 100 is electrified, the controller controls the fuel injector 100 to inject fuel, whether the falling speed of the oil pressure in the accumulator tank 12 is within a set falling speed range after the fuel injector 100 starts to inject fuel is detected, if the falling speed of the oil pressure in the accumulator tank 12 is within the set falling speed range after the fuel injector 100 injects fuel, the fuel injector fault detection device is simple in structure, high in detection accuracy and convenient to operate.
Wherein, as shown in fig. 1, the detection system further comprises a pressure relief valve 16, and the pressure relief valve 16 is communicated with the pressure accumulation tank 12. Specifically, the relief valve 16 communicates with the accumulator tank 12 through a third pipe. By providing the relief valve 16, when the oil pressure value of the oil in the accumulator tank 12 is greater than the set oil pressure value, the controller controls the relief valve 16 to operate until the oil pressure value in the accumulator tank 12 is equal to the set oil pressure value, thereby ensuring that the oil pressure value in the accumulator tank 12 is stabilized at the set oil pressure value, and improving the accuracy of detecting whether the oil injector 100 fails.
The fault detection device of the oil sprayer further comprises an oil tank, the hydraulic pump 11 is further communicated with the oil tank, and the pressure relief valve 16 is further communicated with the oil tank. It will be appreciated that the tank supplies pumped hydraulic oil to the hydraulic pump 11, and when the oil pressure value of the oil in the accumulator tank 12 is greater than the set oil pressure value, the hydraulic oil unloaded through the relief valve 16 flows back to the tank.
Specifically, the hydraulic pump 11 is an electric pump. The working efficiency of the electric pump is high. As an alternative, the hydraulic pump 11 may also be a manual pump.
The fault detection device of the fuel injector further comprises an alarm, and the alarm is electrically connected with the controller. Specifically, when the detection system detects a failure of fuel injector 100, an alarm alerts to prompt a worker of the failure of fuel injector 100.
The invention also provides a fault detection method of the oil sprayer, which is applied to the fault detection device of the oil sprayer, and can rapidly, efficiently and accurately detect whether the oil sprayer 100 has faults.
As shown in fig. 2, the method for detecting the fault of the fuel injector specifically includes the following steps:
s100, measuring whether the resistance of the fuel injector 100 is in a set resistance value range.
If the resistance of the fuel injector 100 is within the set resistance value range, S200 is executed.
If the resistance of the fuel injector 100 is not within the set resistance value range, it indicates that the resistance of the fuel injector 100 is abnormal and the fuel injector 100 fails.
Specifically, whether the resistance value of the solenoid of fuel injector 100 is within the set resistance value range is detected by a multimeter. In this manner, it is preliminarily determined whether or not the fuel injector 100 is malfunctioning.
And S200, controlling the hydraulic pump 11 to pump oil to the pressure accumulation tank 12.
S300, judging whether the oil pressure value of the accumulator 12 is equal to or higher than a set oil pressure value.
If the hydraulic pressure value of the accumulator 12 is equal to or greater than the set hydraulic pressure value, S400 is executed.
If the hydraulic pressure value of the accumulator 12 is smaller than the set hydraulic pressure value, S500 is executed.
S400, the hydraulic pump 11 is controlled to stop pumping oil, and whether the oil injector 100 fails or not is judged according to the descending speed of the oil pressure of the pressure accumulation tank 12.
The specific steps for judging whether the fuel injector 100 is malfunctioning according to the rate of decrease of the oil pressure of the accumulator tank 12 are as follows:
and S410, electrifying the fuel injector 100, and controlling the fuel injector 100 to spray fuel.
S420, judging whether the descending speed is within the set descending speed range.
If the descent speed is within the set descent speed range, it indicates that the fuel injector 100 is normal.
If the descent speed is not within the set descent speed range, a failure of fuel injector 100 is indicated. At this time, the controller controls the alarm to alarm.
S500, judging whether the duration of the oil pumping of the hydraulic pump 11 is greater than or equal to the set duration.
If the duration of the pumping of the hydraulic pump 11 is longer than or equal to the set duration, a system fault is detected. It will be appreciated that if the duration of the pumping of the hydraulic pump 11 is greater than or equal to the set duration and the oil pressure value of the accumulator tank 12 is less than the set oil pressure value, this indicates that one or more of the accumulator tank 12, the first pipe 14 and the second pipe 15 is malfunctioning, and the detection system needs to be maintained.
Wherein, when the pressure sensor 13 detects that the oil pressure value of the accumulator 12 is greater than the set oil pressure value, in order to ensure that the oil pressure value in the accumulator 12 is stable at the set oil pressure value, the following steps are further included between the step S300 and the step S400:
the relief valve 16 operates until the oil pressure value in the accumulator tank 12 is equal to the set oil pressure value.
This arrangement ensures that whether the fuel injector 100 malfunctions or not is effectively detected by setting the descent speed range, and improves the detection accuracy of the fuel injector malfunction detection device.
Therefore, the fault detection method of the fuel injector is applied to the fault detection device of the fuel injector, and can rapidly, efficiently and accurately detect whether the fuel injector 100 has faults.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. A method for detecting a fault in an injector, the injector fault detecting device comprising:
the detection system comprises a hydraulic pump (11), an accumulator tank (12) and a pressure sensor (13), wherein the hydraulic pump (11) is communicated with the accumulator tank (12), the accumulator tank (12) is communicated with an oil sprayer (100), and the pressure sensor (13) is arranged in the accumulator tank (12) and is used for monitoring the oil pressure of the accumulator tank (12);
the controller is electrically connected with the pressure sensor (13) and the oil injector (100), and can control the oil injector (100) to inject oil according to the electric signal of the pressure sensor (13);
the fault detection method of the fuel injector comprises the following steps:
measuring whether the resistance of the fuel injector (100) is within a set resistance value range;
controlling the hydraulic pump (11) to pump oil to the accumulator tank (12) if the resistance of the fuel injector (100) is within a set resistance value range;
judging whether the oil pressure value of the pressure accumulation tank (12) is larger than or equal to a set oil pressure value;
and if the oil pressure value of the pressure accumulation tank (12) is larger than or equal to the set oil pressure value, controlling the hydraulic pump (11) to stop pumping oil, and judging whether the oil injector (100) fails according to the descending speed of the oil pressure of the pressure accumulation tank (12).
2. The fuel injector failure detection method according to claim 1, characterized in that the detection system further comprises a pressure relief valve (16), the pressure relief valve (16) being in communication with the accumulator tank (12).
3. The fuel injector failure detection method according to claim 2, characterized in that the fuel injector failure detection device further includes a fuel tank, the hydraulic pump (11) further communicates with the fuel tank, and the relief valve (16) further communicates with the fuel tank.
4. The fuel injector failure detection method according to claim 1, characterized in that the hydraulic pump (11) is an electric pump.
5. The fuel injector fault detection method of claim 1, wherein the fuel injector fault detection device further comprises an alarm, the alarm being electrically connected to the controller.
6. The fuel injector failure detection method according to claim 1, characterized in that if the resistance value of the fuel injector (100) is not within the set resistance value range, it indicates that the resistance of the fuel injector (100) is abnormal, and the fuel injector (100) fails.
7. The fuel injector failure detection method according to claim 1, characterized in that if the oil pressure value of the accumulator tank (12) is smaller than the set oil pressure value, it is judged whether or not the duration of pumping of the hydraulic pump (11) is equal to or longer than a set duration;
and if the duration of oil pumping of the hydraulic pump (11) is longer than or equal to the set duration, indicating that the detection system fails.
8. The fuel injector failure detection method according to claim 1, characterized in that the specific step of judging whether the fuel injector (100) fails or not in accordance with the rate of decrease of the oil pressure of the accumulator tank (12) includes:
energizing the fuel injector (100) and controlling the fuel injector (100) to inject fuel;
judging whether the descent speed is within a set descent speed range;
if the descent speed is within the set descent speed range, the fuel injector (100) is indicated to be normal;
if the descent speed is not within the set descent speed range, a fault of the fuel injector (100) is indicated.
9. The fuel injector failure detection method according to claim 1, characterized in that the detection system further includes a relief valve (16), and if the oil pressure value of the accumulator tank (12) is greater than the set oil pressure value, the relief valve (16) is operated until the oil pressure value in the accumulator tank (12) is equal to the set oil pressure value.
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| CN202210683842.6A CN114876690B (en) | 2022-06-16 | 2022-06-16 | Fault detection device and fault detection method for oil sprayer |
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| CN202210683842.6A CN114876690B (en) | 2022-06-16 | 2022-06-16 | Fault detection device and fault detection method for oil sprayer |
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| CN114876690B true CN114876690B (en) | 2023-06-23 |
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| CN101377163A (en) * | 2007-08-31 | 2009-03-04 | 株式会社电装 | Fuel injection device, fuel injection system, and method for determining malfunction of the same |
| CN102182603A (en) * | 2011-05-24 | 2011-09-14 | 浙江大学 | Fault diagnosis device and method for high-pressure common-rail fuel injection system |
| 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 |
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| CN110985258A (en) * | 2019-12-30 | 2020-04-10 | 潍柴动力股份有限公司 | High-pressure oil pump fault detection method and device |
| CN114151258A (en) * | 2021-12-08 | 2022-03-08 | 一汽解放汽车有限公司 | Oil injector oil return fault diagnosis method, fuel system and internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996311B (en) * | 2012-12-04 | 2014-09-24 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Method and system for diagnosing oil return failure of electronic control common rail oil sprayer |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377163A (en) * | 2007-08-31 | 2009-03-04 | 株式会社电装 | Fuel injection device, fuel injection system, and method for determining malfunction of the same |
| CN102182603A (en) * | 2011-05-24 | 2011-09-14 | 浙江大学 | Fault diagnosis device and method for high-pressure common-rail fuel injection system |
| CN103573517A (en) * | 2012-08-10 | 2014-02-12 | 北汽福田汽车股份有限公司 | Detector and detection method for common rail and oil sprayer of engine |
| 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 |
| CN110985258A (en) * | 2019-12-30 | 2020-04-10 | 潍柴动力股份有限公司 | High-pressure oil pump fault detection method and device |
| CN114151258A (en) * | 2021-12-08 | 2022-03-08 | 一汽解放汽车有限公司 | Oil injector oil return fault diagnosis method, fuel system and internal combustion engine |
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| CN114876690A (en) | 2022-08-09 |
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