CN108869077A - A kind of fuel injector flow accurately controls method - Google Patents
A kind of fuel injector flow accurately controls method Download PDFInfo
- Publication number
- CN108869077A CN108869077A CN201810548443.2A CN201810548443A CN108869077A CN 108869077 A CN108869077 A CN 108869077A CN 201810548443 A CN201810548443 A CN 201810548443A CN 108869077 A CN108869077 A CN 108869077A
- Authority
- CN
- China
- Prior art keywords
- fuel injector
- pressure
- cylinder
- spray characteristic
- difference before
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0614—Actual fuel mass or fuel injection amount
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a kind of fuel injector flows to accurately control method, on cylinder setting can real-time monitoring inner pressure of air cylinder cylinder pressure sensor, pressure difference before and after ECU receives the cylinder pressure value of cylinder pressure sensor transmitting and asks difference to obtain fuel injector with the rail pressure value in common rail pipe it forms new fuel injector spray characteristic using pressure difference before and after fuel injector as the pressure of spray characteristic input parameter.The present invention forms new fuel injector spray characteristic using pressure difference before and after fuel injector as the pressure of spray characteristic input parameter, more meet the actual condition of engine, the flow of fuel injector can dynamically be controlled, accuracy is more high, discharge is easier to control, it is higher to control precision, engine performance is effectively ensured.
Description
Technical field
The present invention relates to fuel injector flow control technology fields, more specifically, it relates to which a kind of fuel injector flow is accurate
Control method.
Background technique
The injection system of engine is as shown in Figure 1, ECU controls fuel metering valve 4 to control the rail pressure of common rail pipe 1, common rail
High pressure oil in pipe 1 is transported to fuel injector 3 by high-pressure oil pipe 2, and ECU control fuel injector 3 injects fuel into cylinder 7, rail pressure
5 real-time detection rail pressure of sensor simultaneously feeds back to ECU.
Currently, usually using the rail pressure on common rail pipe as fuel injector inlet pressure, fuel injector oil outlet on engine
Pressure (in-cylinder pressure of time for spraying) is defaulted as 0, the front and back pressure difference using the rail pressure on common rail pipe as fuel injector, what mainstream used
Spray characteristic is obtained based on rail pressure and power-up time of fuel sprayer, as shown in Fig. 2, X is rail pressure, Tp is power-up time, and Y is spray
Oily device flow.In actual use, single use rail pressure inputs parameter as pressure, can not accurately embody the practical work of fuel injector
Condition will lead to actual ejection amount inaccuracy, influence engine performance, from emission regulation for, actual fuel injection amount is inaccurate, by band
To discharge exceeded risk.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the prior art above-mentioned deficiency, provide it is a kind of can be according to actual condition
The fuel injector flow of the accurate the amount of injection for determining fuel injector accurately controls method.
The technical scheme is that such：A kind of fuel injector flow accurately controls method, and setting can be real on cylinder
When monitor inner pressure of air cylinder cylinder pressure sensor, ECU receive cylinder pressure sensor transmitting cylinder pressure value and by its in common rail pipe
Rail pressure value asks difference to obtain pressure difference before and after fuel injector, inputs parameter using pressure difference before and after fuel injector as the pressure of spray characteristic
Form new fuel injector spray characteristic.
As a further improvement, the cylinder pressure sensor is mounted on cylinder and is electrically connected with ECU.
Further, pressure difference=rail pressure value-cylinder pressure value before and after fuel injector.
Beneficial effect
Compared with prior art, the present invention have the advantage that for：Using pressure difference before and after fuel injector as spray characteristic
Pressure input parameter forms new fuel injector spray characteristic, more meets the actual condition of engine, can dynamically control fuel injector
Flow, accuracy is more high, and discharge is easier to control, control precision it is higher, engine performance is effectively ensured.
Detailed description of the invention
Fig. 1 is the schematic diagram of traditional technology injection system；
Fig. 2 is traditional skill spray characteristic figure；
Fig. 3 is the schematic diagram using injection system of the invention.
Wherein, 1- common rail pipe, 2- high-pressure oil pipe, 3- fuel injector, 4- fuel metering valve, 5- rail pressure sensor, 6- cylinder pressure pass
Sensor, 7- cylinder.
Specific embodiment
The present invention is described further for specific embodiment in reference to the accompanying drawing.
Refering to fig. 1-3, a kind of fuel injector flow accurately controls method, and setting can 7 internal pressure of real-time monitoring cylinder on cylinder 7
The cylinder pressure sensor 6 of power, ECU receive the cylinder pressure value that cylinder pressure sensor 6 transmits and it are asked poor with the rail pressure value in common rail pipe 1 and obtain
Pressure difference before and after to fuel injector, specifically, cylinder pressure value are the real-time pressure value in 3 oil spout front air cylinder 7 of fuel injector, and rail pressure value is spray
Real-time pressure value before oily 3 oil spout of device in common rail pipe 1 inputs ginseng using pressure difference before and after fuel injector as the pressure of spray characteristic
The fuel injector spray characteristic of number form Cheng Xin.
Cylinder pressure sensor 6 is mounted on cylinder 7 and is electrically connected with ECU, pressure difference=rail pressure value-cylinder pressure before and after fuel injector
Value.
The beneficial effects of the invention are as follows：It is formed using pressure difference before and after fuel injector as the pressure of spray characteristic input parameter
New fuel injector spray characteristic can embody the true spray characteristic of fuel injector, realize that the response accuracy of distributive value improves, more meet
The actual condition of engine can dynamically control the flow of fuel injector, and accuracy is more high, and discharge is easier to control, control essence
Engine performance is effectively ensured in Du Genggao.
What has been described above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art,
Without departing from the structure of the invention, several modifications and improvements can also be made, these all will not influence implementation of the present invention
Effect and patent practicability.
Claims (3)
1. a kind of fuel injector flow accurately controls method, it is characterised in that：Setting can real-time monitoring cylinder (7) on cylinder (7)
The cylinder pressure sensor (6) of interior pressure, ECU receive the cylinder pressure value of cylinder pressure sensor (6) transmitting and by itself and the rail in common rail pipe (1)
Pressure value asks difference to obtain pressure difference before and after fuel injector, inputs parameter shape using pressure difference before and after fuel injector as the pressure of spray characteristic
The fuel injector spray characteristic of Cheng Xin.
2. a kind of fuel injector flow according to claim 1 accurately controls method, it is characterised in that：The cylinder presses sensing
Device (6) is mounted on cylinder (7) and is electrically connected with ECU.
3. a kind of fuel injector flow according to claim 1 accurately controls method, it is characterised in that：Pressure difference before and after fuel injector
Value=rail pressure value-cylinder pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810548443.2A CN108869077A (en) | 2018-05-31 | 2018-05-31 | A kind of fuel injector flow accurately controls method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810548443.2A CN108869077A (en) | 2018-05-31 | 2018-05-31 | A kind of fuel injector flow accurately controls method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108869077A true CN108869077A (en) | 2018-11-23 |
Family
ID=64336124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810548443.2A Pending CN108869077A (en) | 2018-05-31 | 2018-05-31 | A kind of fuel injector flow accurately controls method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108869077A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110083997A (en) * | 2019-06-03 | 2019-08-02 | 广西玉柴机器股份有限公司 | The accurate calculation method of fuel injector actual fuel injection amount |
| CN114562377A (en) * | 2020-11-27 | 2022-05-31 | 长城汽车股份有限公司 | Method and device for controlling fuel injection quantity of vehicle engine, electronic equipment, storage medium and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1735746A (en) * | 2003-09-30 | 2006-02-15 | 丰田自动车株式会社 | The fuel injection control system of internal-combustion engine |
| CN101400887A (en) * | 2006-03-10 | 2009-04-01 | 西港能源有限公司 | Method of accurately metering a gaseous fuel that is injected directly into a combustion chamber of an internal combustion engine |
| US8095294B1 (en) * | 2010-08-19 | 2012-01-10 | Westport Power Inc. | Method for determining fuel injection on-time in a gaseous-fuelled internal combustion engine |
| CN103216350A (en) * | 2012-01-19 | 2013-07-24 | 福特环球技术公司 | Methods and systems for controlling fuel injection |
| CN105264206A (en) * | 2013-06-05 | 2016-01-20 | 丰田自动车株式会社 | Control device for internal combustion engine |
| US20180112622A1 (en) * | 2016-10-25 | 2018-04-26 | Caterpillar Inc. | System and method for analyzing fuel for fleet calibration |
-
2018
- 2018-05-31 CN CN201810548443.2A patent/CN108869077A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1735746A (en) * | 2003-09-30 | 2006-02-15 | 丰田自动车株式会社 | The fuel injection control system of internal-combustion engine |
| CN101400887A (en) * | 2006-03-10 | 2009-04-01 | 西港能源有限公司 | Method of accurately metering a gaseous fuel that is injected directly into a combustion chamber of an internal combustion engine |
| US8095294B1 (en) * | 2010-08-19 | 2012-01-10 | Westport Power Inc. | Method for determining fuel injection on-time in a gaseous-fuelled internal combustion engine |
| CN103216350A (en) * | 2012-01-19 | 2013-07-24 | 福特环球技术公司 | Methods and systems for controlling fuel injection |
| CN105264206A (en) * | 2013-06-05 | 2016-01-20 | 丰田自动车株式会社 | Control device for internal combustion engine |
| US20180112622A1 (en) * | 2016-10-25 | 2018-04-26 | Caterpillar Inc. | System and method for analyzing fuel for fleet calibration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110083997A (en) * | 2019-06-03 | 2019-08-02 | 广西玉柴机器股份有限公司 | The accurate calculation method of fuel injector actual fuel injection amount |
| CN114562377A (en) * | 2020-11-27 | 2022-05-31 | 长城汽车股份有限公司 | Method and device for controlling fuel injection quantity of vehicle engine, electronic equipment, storage medium and vehicle |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |