CN116816569A - Correction method for fuel injection quantity of fuel injector - Google Patents
Correction method for fuel injection quantity of fuel injector Download PDFInfo
- Publication number
- CN116816569A CN116816569A CN202310926593.3A CN202310926593A CN116816569A CN 116816569 A CN116816569 A CN 116816569A CN 202310926593 A CN202310926593 A CN 202310926593A CN 116816569 A CN116816569 A CN 116816569A
- Authority
- CN
- China
- Prior art keywords
- oil
- fuel
- injector
- injection quantity
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F02M65/001—Measuring fuel delivery of a fuel injector
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a correction method of oil injection quantity of an oil injector, which comprises the following steps: measuring the actual value of the oil injection quantity of the oil injector under the test energizing time and the test oil injection pressure by using an electronic service tool; the electronic service tool transmits the measured true value of the oil injection quantity of the oil injector to an electronic control module of the engine, and compares the true value with a reference value of the oil injection quantity of the oil injector stored in the electronic control module under the corresponding test energizing time and test oil injection pressure; if the measured actual value of the oil injection quantity of the oil injector is different from the stored reference value of the oil injection quantity of the oil injector, the electronic service tool sends an instruction for updating the oil quantity formula to the electronic control module; the electronic control module calculates an updated oil quantity formula according to the instruction, stores the updated oil quantity formula into the electronic control module, and drives the oil injector to spray oil according to the updated oil quantity formula. The invention can improve the oil injection precision of the oil injector, further reduce the failure rate of the oil injector and prolong the service life of the oil injector.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a correction method of oil injection quantity of an oil injector.
Background
The control strategy of the fuel injection quantity of the fuel injector used in the current diesel engine is generally open-loop control, the fuel injection quantity of the fuel injector is usually determined by fuel injection pressure and fuel injector power-on time, and the open-loop control means that the corresponding relation of the fuel injection quantity, the fuel injection pressure and the fuel injector power-on time is fixed. However, since the fuel injection characteristics of the fuel injector change with the accumulation of the energization time, there is a case where the accuracy of the fuel injection amount continues to deteriorate using the logic of open-loop control. In the prior art, when a vehicle fails in relation to the oil injection quantity precision of an oil injector, the oil injection quantity precision of the oil injector is usually tested at a service station, but the oil injection quantity precision is not corrected, namely, the deviation of the oil injector caused by abrasion or blockage in the use process cannot be corrected, so that the failure rate of the oil injector is increased. If the deviation of the fuel injection quantity precision of the fuel injector reaches a certain level, the fuel injector is determined to be replaced by the failed fuel injector, so that the service life of the fuel injector is shortened.
Disclosure of Invention
The invention aims to provide a correction method for the oil injection quantity of an oil injector aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: a correction method of the oil injection quantity of an oil injector comprises the following steps: measuring the true value of the oil injection quantity of the oil injector under the test energizing time and the test oil injection pressure by using an electronic service tool; the electronic service tool transmits the measured true value of the oil injection quantity of the oil injector to an electronic control module of an engine, and compares the true value with a reference value of the oil injection quantity of the oil injector stored in the electronic control module under the corresponding test energizing time and test oil injection pressure; if the measured true value of the fuel injection quantity of the fuel injector is different from the stored reference value of the fuel injection quantity of the fuel injector, the electronic service tool sends an instruction for updating a fuel quantity formula to the electronic control module; the electronic control module calculates an updated oil quantity formula according to the instruction and stores the updated oil quantity formula into the electronic control module, and the electronic control module drives the oil injector to spray oil according to the updated oil quantity formula.
In a specific embodiment, the updated oil quantity formula is:
Q′＝C 1 ′T+C 2 ′P+C 3 ′PT+C 4 ' formula (1)
Wherein T is the energizing time of the fuel injector; p is the oil injection pressure of the oil injector; q' is the updated fuel injection quantity of the fuel injector under the corresponding power-on time and the corresponding fuel injection pressure; c (C) 1 ′、C 2 ′、C 3 ' and C 4 ' is the corresponding updated oil mass coefficient.
In a specific embodiment, a plurality of detection points of the fuel injector are selected, and the updated fuel quantity formula is fitted according to the test power-on time, the test fuel injection pressure and the corresponding fuel injection quantity of the plurality of detection points.
In a specific embodiment, the plurality of detection points include a first detection point and a second detection point, and multiple solutions of the oil mass formula of the oil injector are determined according to the test energizing time, the test oil injection pressure and the corresponding oil injection amount of the first detection point and the test energizing time, the test oil injection pressure and the corresponding oil injection amount of the second detection point of the oil injector:
q1=f (T1, P1) formula (2)
Q2=f (T2, P2) formula (3)
Wherein T1 is the test power-on time of the first measuring point; p1 is the test oil injection pressure of the first measuring point; q1 is the corresponding oil injection quantity of the first measuring point; t2 is the test power-on time of the second measuring point; p2 is the test oil injection pressure of the second measuring point; q2 is the corresponding oil injection quantity of the second measuring point.
In a specific embodiment, the multiple solutions of the fuel quantity formula of the fuel injector are fitted by a least square method to obtain the updated fuel quantity formula.
In a specific embodiment, the reference value of the fuel injection quantity of the fuel injector under the corresponding test energizing time and the test fuel injection pressure is obtained according to an initial fuel quantity formula of the fuel injection quantity of the fuel injector stored in the electronic control module.
In a specific embodiment, the initial oil quantity formula of the oil injection quantity of the oil injector stored in the electronic control module is as follows:
Q＝C 1 T+C 2 P+C 3 PT+C 4 formula (4)
Wherein T is the power-on time of the fuel injector; p is the oil injection pressure of the oil injector; q is the aboveInitial fuel injection quantity of the fuel injector under the corresponding energizing time and the fuel injection pressure; c (C) 1 、C 2 、C 3 C (C) 4 Is the corresponding initial oil mass coefficient.
In a specific embodiment, the electronic service tool includes: at least one processor; and a memory coupled to the processor; wherein the memory has stored thereon calculated program instructions executable by the processor, which instructions, when executed by the processor, cause the processor to perform a corresponding operation to measure a true value of the fuel injection quantity of the fuel injector.
Compared with the prior art, the invention has the beneficial effects that:
the correction method of the oil injection quantity of the oil injector can correct deviation of the oil injector caused by abrasion or blockage in the use process by utilizing the updated oil quantity formula, so that the oil injection precision of the oil injector can be improved, the function of closed-loop correction is achieved, the failure rate of the oil injector can be reduced, the service life of the oil injector is prolonged, and meanwhile, the dynamic property of an engine can be improved, and the economy is good.
Drawings
FIG. 1 is a flow chart of one embodiment of a method for correcting fuel injection quantity of a fuel injector according to the present invention;
FIG. 2 is a graph showing an updated fuel quantity formula and an initial fuel quantity formula for one embodiment of a method of correcting fuel injection quantity of a fuel injector according to the present invention.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
As shown in fig. 1, the method for correcting the fuel injection quantity of the fuel injector of the invention comprises the following steps:
(1) And measuring the actual value of the oil injection quantity of the oil injector under the test energizing time and the test oil injection pressure by using an electronic service tool. By way of example, the electronic service tool is used to detect the actual value of the fuel injection quantity of the fuel injector after the vehicle enters the station. The electronic service tool is utilized to detect the true value of the oil injection quantity of the oil injector in real time, and the electronic service tool is high in accuracy and good in reliability.
(2) The electronic service tool transmits the measured true value of the oil injection quantity of the oil injector to an electronic control module of the engine, and compares the true value with a reference value of the oil injection quantity of the oil injector stored in the electronic control module under the corresponding test energizing time and test oil injection pressure. The actual value of the oil injection quantity of the oil injector is compared with the corresponding reference value of the oil injection quantity of the oil injector, so that whether the actual value of the oil injection quantity of the oil injector deviates from the corresponding reference value of the oil injection quantity of the oil injector can be conveniently determined.
(3) If the measured actual value of the fuel injection quantity of the fuel injector is different from the stored reference value of the fuel injection quantity of the fuel injector, the electronic service tool sends an instruction for updating the fuel quantity formula to the electronic control module. The electronic service tool sends the instruction for updating the oil quantity formula to the electronic control module, so that the electronic control module can be conveniently controlled to update the oil quantity formula in real time.
(4) The electronic control module calculates an updated oil quantity formula according to the instruction, stores the updated oil quantity formula into the electronic control module, and drives the oil injector to spray oil according to the updated oil quantity formula. The electronic control module drives the oil injector to inject oil according to the updated oil quantity formula, so that the oil injection precision of the oil injector can be improved.
The electronic service tool is used for measuring the actual value of the oil injection quantity of the oil injector in real time, sending an instruction for updating an oil quantity formula to the electronic control module according to the deviation between the actual value of the oil injection quantity of the oil injector and a reference value, and driving the oil injector to inject oil according to the updated oil quantity formula by the electronic control module, so that the deviation of the oil injector caused by abrasion or blockage in the use process can be corrected, the oil injection precision of the oil injector can be improved, the closed loop correction function is achieved, the failure rate of the oil injector can be reduced, the service life of the oil injector is prolonged, the power performance of an engine can be improved, and the economy is good. The correction method can solve the problem that the open-loop oil quantity control strategy cannot correct oil quantity deviation.
In a specific embodiment, the updated oil quantity formula is:
Q′＝C 1 ′T+C 2 ′P+C 3 ′PT+C 4 ' formula (1)
Wherein T is the energizing time of the fuel injector; p is the oil injection pressure of the oil injector; q' is the updated oil injection quantity of the oil injector under the corresponding power-on time and oil injection pressure; c1', C2', C3 'and C4' are corresponding updated oil mass coefficients, and the oil mass coefficients are determined according to the oil mass characteristics of the oil injector.
The updated oil quantity formula can accurately represent the relation between the updated oil quantity of the oil injector, the oil injection pressure of the oil injector and the energizing time of the oil injector, and the electronic control module drives the oil injector to perform oil injection according to the updated oil quantity formula, so that the oil injection precision of the oil injector can be improved. The updated fuel quantity formula curve of the fuel injection quantity of the fuel injector stored in the electronic control module is shown in fig. 2.
In a specific embodiment, a plurality of detection points of the fuel injector are selected, and an updated fuel quantity formula is fitted according to the test power-on time, the test fuel injection pressure and the corresponding fuel injection quantity of the plurality of detection points. The accuracy of the fitted updated oil quantity formula can be improved by selecting a plurality of detection points of the oil sprayer.
In a particular embodiment, the plurality of inspection points includes a first inspection point and a second inspection point. According to the test energizing time, the test oil injection pressure and the corresponding oil injection quantity of the first measuring point and the test energizing time, the test oil injection pressure and the corresponding oil injection quantity of the second measuring point of the oil injector, a plurality of solutions of the oil quantity formula of the oil injector are determined:
q1=f (T1, P1) formula (2)
Q2=f (T2, P2) formula (3)
Wherein T1 is the test power-on time of the first measuring point; p1 is the test oil injection pressure of the first measuring point; q1 is the corresponding oil injection quantity of the first measuring point; t2 is the test power-on time of the second measuring point; p2 is the test oil injection pressure of the second measuring point; q2 is the corresponding oil injection quantity of the second measuring point.
The two groups of solutions of the oil mass formula of the oil injector can be simply and efficiently determined by using the test energization time, the test oil injection pressure and the corresponding oil injection quantity of the first measuring point and the test energization time, the test oil injection pressure and the corresponding oil injection quantity of the second measuring point of the oil injector, and the accuracy is high and the reliability is good.
In a specific embodiment, multiple solutions of the fuel quantity formula of the fuel injector are fitted through a least square method to obtain an updated fuel quantity formula. The optimal linear equation can be obtained by utilizing a plurality of groups of solutions actually measured by the oil injector and fitting the solutions by a least square method, so that an updated oil quantity formula is obtained.
In a specific embodiment, the reference value of the fuel injection quantity of the fuel injector under the corresponding test energizing time and test fuel injection pressure is obtained according to an initial fuel quantity formula of the fuel injection quantity of the fuel injector stored in the electronic control module. The initial oil quantity formula of the oil injection quantity of the oil injector stored in the electronic control module in the open-loop oil quantity control strategy can be kept unchanged in the service life of the oil injector.
In a specific embodiment, the initial oil quantity formula of the oil injection quantity of the oil injector stored in the electronic control module is as follows:
Q＝C 1 T+C 2 P+C 3 PT+C 4 formula (4)
Wherein T is the energizing time of the fuel injector; p is the oil injection pressure of the oil injector; q is the initial oil injection quantity of the oil injector under the corresponding power-on time and oil injection pressure; c (C) 1 、C 2 、C 3 C (C) 4 The oil mass coefficient is determined according to the oil mass characteristic of the oil injector for the corresponding initial oil mass coefficient.
The initial oil quantity formula can represent the relation between the initial oil quantity of the oil injector, the oil injection pressure of the oil injector and the power-on time of the oil injector, and the initial oil quantity formula is unchanged in the service life of the oil injector. The initial fuel quantity formula curve of the fuel injection quantity of the fuel injector stored in the electronic control module is shown in fig. 2.
In a specific embodiment, the electronic service tool comprises: at least one processor; and a memory coupled to the processor; wherein the memory has stored thereon calculated program instructions executable by the processor, which instructions, when executed by the processor, cause the processor to perform a corresponding operation to measure a true value of the fuel injection quantity of the fuel injector.
When the oil sprayer is used, the electronic service tool is utilized to measure the actual value of the oil spraying quantity of the oil sprayer in real time, and a command for updating the oil quantity formula is sent to the electronic control module according to the deviation between the actual value of the oil spraying quantity of the oil sprayer and the reference value, the electronic control module drives the oil sprayer to spray oil according to the updated oil quantity formula, so that the deviation of the oil sprayer caused by abrasion or blockage in the use process can be corrected, the oil spraying precision of the oil sprayer can be improved, the function of closed loop correction is achieved, the failure rate of the oil sprayer can be reduced, the service life of the oil sprayer is prolonged, the power performance of an engine can be improved, and the economy is good.
The scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the invention. It is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The method for correcting the fuel injection quantity of the fuel injector is characterized by comprising the following steps of:
measuring the actual value of the oil injection quantity of the oil injector under the test energizing time and the test oil injection pressure by using an electronic service tool;
the electronic service tool transmits the measured true value of the oil injection quantity of the oil injector to an electronic control module of an engine, and compares the true value with a reference value of the oil injection quantity of the oil injector stored in the electronic control module under the corresponding test energizing time and test oil injection pressure;
if the measured true value of the fuel injection quantity of the fuel injector is different from the stored reference value of the fuel injection quantity of the fuel injector, the electronic service tool sends an instruction for updating a fuel quantity formula to the electronic control module;
the electronic control module calculates an updated oil quantity formula according to the instruction and stores the updated oil quantity formula into the electronic control module, and the electronic control module drives the oil injector to spray oil according to the updated oil quantity formula.
2. The method for correcting the fuel injection quantity of a fuel injector according to claim 1, wherein the updated fuel quantity formula is:
wherein T is the energizing time of the fuel injector; p is the oil injection pressure of the oil injector; q' is the updated fuel injection quantity of the fuel injector under the corresponding power-on time and the corresponding fuel injection pressure; c (C) 1 ′、C 2 ′、C 3 ' and C 4 ' is the corresponding updated oil mass coefficient.
3. The method for correcting the fuel injection quantity of the fuel injector according to claim 1 or 2, characterized in that a plurality of detection points of the fuel injector are selected, and the updated fuel quantity formula is fitted according to the test energizing time, the test fuel injection pressure and the corresponding fuel injection quantity of the plurality of detection points.
4. The method for correcting the fuel injection quantity of a fuel injector according to claim 3, wherein the plurality of detection points comprise a first detection point and a second detection point, and a plurality of solutions of the fuel quantity formula of the fuel injector are determined according to the test energizing time, the test fuel injection pressure and the corresponding fuel injection quantity of the first detection point and the test energizing time, the test fuel injection pressure and the corresponding fuel injection quantity of the second detection point of the fuel injector:
q1=f (T1, P1) formula (2)
Q2=f (T2, P2) formula (3)
Wherein T1 is the test power-on time of the first measuring point; p1 is the test oil injection pressure of the first measuring point; q1 is the corresponding oil injection quantity of the first measuring point; t2 is the test power-on time of the second measuring point; p2 is the test oil injection pressure of the second measuring point; q2 is the corresponding oil injection quantity of the second measuring point.
5. The method for correcting the fuel injection quantity of a fuel injector according to claim 4, wherein the plurality of solutions of the fuel quantity formula of the fuel injector are fitted by a least square method to obtain the updated fuel quantity formula.
6. The method for correcting the fuel injection quantity of a fuel injector according to claim 1, wherein the reference value of the fuel injection quantity of the fuel injector at the corresponding test energizing time and the test fuel injection pressure is obtained according to an initial fuel quantity formula of the fuel injection quantity of the fuel injector stored in the electronic control module.
7. The method for correcting fuel injection quantity of fuel injector according to claim 6, wherein the initial fuel quantity formula of fuel injection quantity of fuel injector stored in the electronic control module is:
Q＝C 1 T+C 2 P+C 3 PT+C 4 formula (4)
Wherein T is the power-on time of the fuel injector; p is the oil injection pressure of the oil injector; q is the initial oil injection quantity of the oil injector under the corresponding energizing time and oil injection pressure; c (C) 1 、C 2 、C 3 C (C) 4 Is the corresponding initial oil mass coefficient.
8. The method for correcting the fuel injection amount of a fuel injector according to claim 1, wherein the electronic service tool includes: at least one processor; and a memory coupled to the processor; wherein the memory has stored thereon calculated program instructions executable by the processor, which instructions, when executed by the processor, cause the processor to perform a corresponding operation to measure a true value of the fuel injection quantity of the fuel injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310926593.3A CN116816569A (en) | 2023-07-25 | 2023-07-25 | Correction method for fuel injection quantity of fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310926593.3A CN116816569A (en) | 2023-07-25 | 2023-07-25 | Correction method for fuel injection quantity of fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116816569A true CN116816569A (en) | 2023-09-29 |
Family
ID=88142969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310926593.3A Pending CN116816569A (en) | 2023-07-25 | 2023-07-25 | Correction method for fuel injection quantity of fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116816569A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101625A (en) * | 2007-11-22 | 2008-05-01 | Denso Corp | Injection quantity control device for internal combustion engine |
| CN110159444A (en) * | 2019-06-03 | 2019-08-23 | 广西玉柴机器股份有限公司 | Fuel injector distributive value closed loop control method |
| CN112879192A (en) * | 2021-01-22 | 2021-06-01 | 中国船舶重工集团公司第七一一研究所 | Online observation method and device for fuel injection quantity of electric control fuel injector |
-
2023
- 2023-07-25 CN CN202310926593.3A patent/CN116816569A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101625A (en) * | 2007-11-22 | 2008-05-01 | Denso Corp | Injection quantity control device for internal combustion engine |
| CN110159444A (en) * | 2019-06-03 | 2019-08-23 | 广西玉柴机器股份有限公司 | Fuel injector distributive value closed loop control method |
| CN112879192A (en) * | 2021-01-22 | 2021-06-01 | 中国船舶重工集团公司第七一一研究所 | Online observation method and device for fuel injection quantity of electric control fuel injector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10378474B2 (en) | Method and device for ascertaining a correction value for a fuel injection quantity | |
| JP4844651B2 (en) | Data storage | |
| US20110137541A1 (en) | Method for real-time, self-learning identification of fuel injectors during engine operation | |
| US10598116B2 (en) | Method for ascertaining a correction value for fuel metering of a fuel injector | |
| US20110106409A1 (en) | Method and device for the pressure wave compensation during consecutive injections in an injection system of an internal combustion engine | |
| CN108361139A (en) | The small fuel-flow control method of fuel injector | |
| US20090299606A1 (en) | Method and system for controlling a high pressure pump, particularly for a diesel engine fuel injection system | |
| CN101929400B (en) | Learning device | |
| JP2013113135A (en) | Pump control device | |
| US20230017849A1 (en) | System and method for determining and adjusting fuel injection control parameters | |
| JP5293765B2 (en) | Fuel injection state estimation device | |
| JP5218536B2 (en) | Control device | |
| CN103635678B (en) | Method for driving an internal combustion engine and internal combustion engine | |
| CN106704011B (en) | A method for optimizing rail pressure control in rail pressure sensor failure mode | |
| US9334823B2 (en) | Controller for an injection system | |
| CN106593668B (en) | Rail pressure control method under rail pressure sensor fault mode | |
| CN104204484B (en) | Fuel injection control device and fuel injection control method for internal combustion engine | |
| CN116816569A (en) | Correction method for fuel injection quantity of fuel injector | |
| JP2013015076A (en) | Pilot injection amount correction method and common rail type fuel injection control device | |
| JP2008297935A (en) | Fuel injection quantity control method for internal combustion engine | |
| CN113494403B (en) | Method for correcting output value of flow control model of oil rail high-pressure pump | |
| US9267459B2 (en) | Fuel-injector-replacement determining device | |
| JP5360092B2 (en) | Fuel injection control device | |
| JP2011169332A (en) | Data storage device | |
| US20120022767A1 (en) | Error detector for injection characteristic data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |