CN114876690A - Oil injector fault detection device and oil injector fault detection method - Google Patents
Oil injector fault detection device and oil injector fault detection method Download PDFInfo
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- CN114876690A CN114876690A CN202210683842.6A CN202210683842A CN114876690A CN 114876690 A CN114876690 A CN 114876690A CN 202210683842 A CN202210683842 A CN 202210683842A CN 114876690 A CN114876690 A CN 114876690A
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- oil
- injector
- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
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 oil sprayer fault detection device comprises a detection system and a controller, wherein the detection system comprises a hydraulic pump, a pressure storage box and a pressure sensor, the hydraulic pump is communicated with the pressure storage box, the pressure storage box is communicated with an oil sprayer, and the pressure sensor is arranged in the pressure storage box and used for monitoring the oil pressure of the pressure storage 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 oil sprayer fault detection device 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 the engine as a fuel injection technology with high efficiency, low power consumption and light emission. The electronic control fuel injector is one of the most complicated and important parts in a high-pressure common rail fuel injection system, and injects fuel in a high-pressure common rail pipe into a combustion chamber at the best fuel injection timing, fuel injection quantity and fuel injection rate by controlling the on-off of an electromagnetic valve according to the instruction of a controller. Once the oil injector breaks down, the safety and the reliability of the diesel engine are directly influenced. The quick and accurate fault diagnosis can improve the performance of the fuel injector and reduce the maintenance cost, and has important engineering value.
In the prior art, whether the fuel injector breaks down or not is judged according to the volume change of fuel in a fuel tank before and after the fuel injection of the fuel injector of an engine system, but a detection device for specially detecting whether the fuel injector breaks down or not is not provided 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, and aims to solve the problem that a detection device for specially detecting whether the oil sprayer is in fault does not exist in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fuel injector fault detection apparatus, comprising:
the detection system comprises a hydraulic pump, a pressure storage tank and a pressure sensor, the hydraulic pump is communicated with the pressure storage tank, the pressure storage tank is communicated with the oil injector, and the pressure sensor is arranged in the pressure storage tank and used for monitoring the oil pressure of the pressure storage tank;
and the controller is electrically connected with the pressure sensor and the oil injector, and can control the oil injector to inject 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 fuel injector fault detection device 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 fuel injector fault detection device further comprises an alarm, and the alarm is electrically connected with the controller.
A fault detection method of an oil injector is applied to the fault detection device of the oil injector, and comprises the following steps:
measuring whether the resistance of the oil injector is in a set resistance value range;
if the resistance of the oil sprayer is within 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 tank is larger than or equal to a set oil pressure value or not;
and if the oil pressure value of the pressure storage 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 reduction speed of the oil pressure of the pressure storage tank.
Preferably, if the resistance value of the injector is not within the set resistance value range, the resistance of the injector is abnormal, and the injector fails.
Preferably, if the oil pressure value of the pressure accumulation tank is smaller than the set oil pressure value, whether the duration of the hydraulic pump oil pumping is larger than or equal to a set duration is judged;
and if the duration of the oil pumping of the hydraulic pump is greater than or equal to the set duration, indicating that the detection system is in fault.
Preferably, the specific step of determining whether the injector is malfunctioning based on a rate of decrease in the oil pressure of the accumulator tank includes:
electrifying the oil sprayer and controlling the oil sprayer to spray oil;
judging whether the descending speed is within a set descending speed range or not;
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 that operates until the oil pressure value in the accumulator tank becomes equal to the set oil pressure value, if the oil pressure value of the accumulator tank is greater than 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 oil sprayer fault detection device comprises a detection system and a controller, when whether the oil sprayer is in fault needs to be detected, a hydraulic pump is controlled to pump hydraulic oil into a pressure accumulation box until the oil pressure value of oil in the pressure accumulation box is larger than or equal to a set oil pressure value, the hydraulic pump is controlled to stop pumping the hydraulic oil at the moment, the oil sprayer is electrified, the controller controls the oil sprayer to spray oil, whether the falling speed of the oil pressure in the pressure accumulation box after the oil sprayer starts to spray oil is within a set falling speed range is detected, if the falling speed of the oil pressure in the pressure accumulation box after the oil sprayer sprays oil is within the set falling speed range, the fact that the oil sprayer is not in fault is indicated, the oil sprayer fault detection device is simple in structure, high in detection precision and convenient to operate.
Drawings
FIG. 1 is a schematic diagram of a fuel injector fault detection arrangement provided in accordance with an exemplary embodiment of the present invention;
FIG. 2 is a flow chart of a method of fuel injector fault detection provided by an embodiment of the present invention.
In the figure:
100. an oil injector;
11. a hydraulic pump; 12. a pressure storage tank; 13. a pressure sensor; 14. a first pipeline; 15. a second pipeline; 16. and (4) releasing the valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides a fuel injector fault detection device, which comprises a detection system and a controller, wherein as shown in fig. 1, the detection system comprises a hydraulic pump 11, a pressure accumulation box 12 and a pressure sensor 13, the hydraulic pump 11 is communicated with the pressure accumulation box 12, the pressure accumulation box 12 is communicated with a fuel injector 100, and the pressure sensor 13 is arranged in the pressure accumulation box 12 and used for monitoring the oil pressure of the pressure accumulation box 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 inject fuel according to the electric signal of the pressure sensor 13. Specifically, the hydraulic pump 11 is communicated with the pressure accumulation tank 12 through a first pipeline 14, the pressure accumulation tank 12 is communicated with the oil injector 100 through a second pipeline 15, when whether the oil injector 100 fails or not needs to be detected, the hydraulic pump 11 is controlled to pump hydraulic oil into the pressure accumulation tank 12 until the oil pressure value of the oil in the pressure accumulation tank 12 is larger than or equal to a set oil pressure value, the hydraulic pump 11 is controlled to stop pumping the hydraulic oil at the moment, electricity is supplied to the oil injector 100, the oil injector 100 is controlled by a controller to inject oil, whether the falling speed of the oil pressure in the pressure accumulation tank 12 after the oil injector 100 starts oil injection is in a set falling speed range or not is detected, if the falling speed of the oil pressure in the pressure accumulation tank 12 after the oil injector 100 injects oil is in the set falling speed range, the oil injector 100 does not fail, and the oil injector failure detection device is simple in structure, high in detection accuracy and convenient to operate.
As shown in fig. 1, the detection system further includes a pressure relief valve 16, and the pressure relief valve 16 is communicated with the accumulator tank 12. Specifically, the relief valve 16 communicates with the accumulator tank 12 through a third line. By providing the relief valve 16, when the oil pressure value of the oil in the pressure storage 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 pressure storage tank 12 is equal to the set oil pressure value, thereby ensuring that the oil pressure value in the pressure storage tank 12 is stabilized at the set oil pressure value, and improving the accuracy of detecting whether the fuel injector 100 fails.
The oil injector fault detection device 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 is understood that the oil tank supplies the hydraulic pump 11 with the pumped hydraulic oil, 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 discharged through the relief valve 16 is returned to the oil 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 fuel injector fault detection device 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 alert the operator of the failure of fuel injector 100.
The invention also provides a fault detection method of the oil sprayer, which is applied to the oil sprayer fault detection device and can quickly, efficiently and accurately detect whether the oil sprayer 100 has a fault or not.
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 injector 100 is within the set resistance value range, S200 is executed.
If the resistance of injector 100 is not within the set resistance value range, the resistance of injector 100 is abnormal, and injector 100 fails.
Specifically, it is detected by the multimeter whether the resistance value of the electromagnetic coil of injector 100 is within a set resistance value range. Thus, it is preliminarily judged whether or not the fuel injector 100 is malfunctioning.
S200, controlling the hydraulic pump 11 to pump oil to the pressure accumulation tank 12.
S300, whether the hydraulic value of the accumulator tank 12 is larger than or equal to the set hydraulic value is judged.
If the hydraulic pressure value of the accumulator tank 12 is equal to or greater than the set hydraulic pressure value, S400 is executed.
If the hydraulic pressure value of the accumulator tank 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 or not the injector 100 is malfunctioning is determined based on the rate of decrease in the oil pressure in the accumulator tank 12.
The specific steps of determining whether the injector 100 is malfunctioning according to the drop rate 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 inject fuel.
S420, judging whether the descending speed is within the set descending speed range.
If the lowering speed is within the set lowering speed range, it indicates that injector 100 is normal.
If the lowering speed is not within the set lowering speed range, a failure of injector 100 is indicated. At the moment, the controller controls the alarm to alarm.
S500, judging whether the oil pumping duration of the hydraulic pump 11 is greater than or equal to the set duration.
If the duration of the oil pumping of the hydraulic pump 11 is greater than or equal to the set duration, the system fault is detected. It is understood that if the duration of the oil pumping of the hydraulic pump 11 is equal to or greater than the set duration and the oil pressure value of the accumulator tank 12 is less than the set oil pressure value, it 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 repaired.
When the pressure sensor 13 detects that the oil pressure value of the accumulator tank 12 is greater than the set oil pressure value, in order to ensure that the oil pressure value in the accumulator tank 12 is stabilized at the set oil pressure value, the method further includes the following steps between step S300 and step S400:
the relief valve 16 operates until the oil pressure value in the accumulator tank 12 becomes equal to the set oil pressure value.
By the arrangement, whether the fuel injector 100 breaks down or not is effectively detected by setting the descending speed range, and the detection accuracy of the fuel injector fault detection device is improved.
Therefore, the injector fault detection method is applied to the injector fault detection device, and can be used for rapidly, efficiently and accurately detecting whether the injector 100 has a fault or not.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fuel injector failure detection apparatus, comprising:
the detection system comprises a hydraulic pump (11), a pressure accumulation box (12) and a pressure sensor (13), wherein the hydraulic pump (11) is communicated with the pressure accumulation box (12), the pressure accumulation box (12) is communicated with a fuel injector (100), and the pressure sensor (13) is arranged on the pressure accumulation box (12) and is used for monitoring the oil pressure of the pressure accumulation box (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 inject fuel according to an electric signal of the pressure sensor (13).
2. The injector malfunction detection apparatus according to claim 1, characterized in that the detection system further includes a pressure relief valve (16), the pressure relief valve (16) communicating with the pressure storage tank (12).
3. The injector failure detection apparatus according to claim 2, characterized by further comprising a tank, the hydraulic pump (11) being further communicated with the tank, and the relief valve (16) being further communicated with the tank.
4. The fuel injector failure detection apparatus according to claim 1, characterized in that the hydraulic pump (11) is an electric pump.
5. The fuel injector fault detection device of claim 1, further comprising an alarm electrically connected to the controller.
6. An injector failure detection method applied to the injector failure detection apparatus according to any one of claims 1 to 5, characterized by comprising:
measuring whether the resistance of the fuel injector (100) is within a set resistance value range;
if the resistance of the fuel injector (100) is within a set resistance value range, controlling the hydraulic pump (11) to pump oil to the pressure storage tank (12);
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 storage 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) has a fault according to the descending speed of the oil pressure of the pressure storage tank (12).
7. The injector malfunction detection method according to claim 6, characterized in that if the resistance value of the injector (100) is not within the set resistance value range, it indicates that the resistance of the injector (100) is abnormal, and the injector (100) malfunctions.
8. The injector malfunction detection method according to claim 6, characterized in that, if the oil pressure value of the accumulator tank (12) is less than the set oil pressure value, it is determined whether a duration for which the hydraulic pump (11) pumps oil is equal to or greater than a set duration;
and if the duration of the oil pumping of the hydraulic pump (11) is greater than or equal to the set duration, indicating that the detection system is in fault.
9. The injector malfunction detection method according to claim 6, characterized in that the concrete step of judging whether the injector (100) malfunctions or not based on the speed of decrease in the oil pressure of the accumulator tank (12) includes:
electrifying the oil injector (100) and controlling the oil injector (100) to inject oil;
judging whether the descending speed is within a set descending speed range or not;
if the descending speed is within the set descending speed range, the fuel injector (100) is normal;
if the descending speed is not within the set descending speed range, the fault of the fuel injector (100) is indicated.
10. The injector malfunction detection method according to claim 6, 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) operates until the oil pressure value in the accumulator tank (12) is equal to the set oil pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN114876690A true CN114876690A (en) | 2022-08-09 |
| CN114876690B CN114876690B (en) | 2023-06-23 |
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Citations (7)
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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 |
| CN102996311A (en) * | 2012-12-04 | 2013-03-27 | 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 |
| 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 |
| 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 |
| 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 |
-
2022
- 2022-06-16 CN CN202210683842.6A patent/CN114876690B/en active Active
Patent Citations (7)
| 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 |
| CN102996311A (en) * | 2012-12-04 | 2013-03-27 | 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 |
| 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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| CN114876690B (en) | 2023-06-23 |
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