CN107489552B - Oil injection control method, device and system and vehicle - Google Patents
Oil injection control method, device and system and vehicle Download PDFInfo
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- CN107489552B CN107489552B CN201611141719.2A CN201611141719A CN107489552B CN 107489552 B CN107489552 B CN 107489552B CN 201611141719 A CN201611141719 A CN 201611141719A CN 107489552 B CN107489552 B CN 107489552B
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- 238000002347 injection Methods 0.000 title claims abstract description 121
- 239000007924 injection Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000446 fuel Substances 0.000 claims abstract description 98
- 239000007789 gas Substances 0.000 claims abstract description 58
- 239000001301 oxygen Substances 0.000 claims abstract description 48
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 oxygen ions Chemical class 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1445—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being related to the exhaust flow
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- 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)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The disclosure relates to an oil injection control method, an oil injection control device, an oil injection control system and a vehicle. The control method comprises the following steps: acquiring the air intake flow and the engine speed of the engine; acquiring the exhaust flow of an engine; determining an intake air amount in a cylinder of the engine based on at least the intake air flow rate and the exhaust gas flow rate; acquiring detection data of an oxygen concentration sensor provided in an exhaust line of the engine; determining a target fuel injection quantity according to the air inflow, the detection data and the engine rotating speed; and controlling the oil injection nozzle to perform oil injection operation according to the target oil injection quantity. Therefore, the air inflow in the engine cylinder can be accurately known, so that the oil injection quantity of the engine can be accurately controlled, the control precision is improved, the exhaust temperature is reduced, and the exhaust emission is reduced.
Description
Technical Field
The disclosure relates to the field of oil injection control, in particular to an oil injection control method, device and system and a vehicle.
Background
In order to optimize the air intake of the gasoline engine, a continuous variable intake and exhaust valve timing (VTT) system is adopted, and different VTT control strategies are adopted under different engine operating conditions. For example, in a vehicle start, low speed, and large load operating condition region, in order to provide sufficient power, the valve opening angle is increased, the intake air flow rate and the exhaust gas flow rate are increased, and the in-cylinder temperature is reduced, thereby improving the power performance of the engine.
The existing gasoline engine fuel injection control method firstly detects the air input of the engine, determines the required fuel injection quantity according to the theoretical air-fuel ratio, and then carries out closed-loop correction control through an oxygen concentration sensor. After the vehicle is scavenged, a large amount of fresh air flows into the exhaust system, so that the detection accuracy of the intake air amount is lowered. Therefore, the control of the fuel injection quantity of the engine is inaccurate, the power for the operation of the engine is reduced, the fuel consumption is increased, and the problems of high exhaust temperature, over-limit exhaust emission and the like are easily caused.
Disclosure of Invention
The invention aims to provide an oil injection control method, an oil injection control device, an oil injection control system and a vehicle, aiming at the problem that in the prior art, the oil injection quantity cannot be accurately controlled due to inaccurate measurement of the actual air intake quantity in a cylinder.
In order to achieve the above object, the present disclosure provides an injection control method, including: acquiring the air intake flow and the engine speed of the engine; acquiring the exhaust flow of an engine; determining an intake air amount in a cylinder of the engine based on at least the intake air flow rate and the exhaust gas flow rate; acquiring detection data of an oxygen concentration sensor provided in an exhaust line of the engine; determining a target fuel injection quantity according to the air inflow, the detection data and the engine rotating speed; and controlling the oil injection nozzle to perform oil injection operation according to the target oil injection quantity.
Optionally, the obtaining an exhaust flow of the engine includes: the exhaust flow rate of the engine is acquired by an exhaust flowmeter provided between an exhaust port of the engine and the oxygen concentration sensor.
Optionally, the determining an intake air amount in a cylinder of the engine based on at least the intake air flow rate and the exhaust gas flow rate comprises: determining a flow rate of exhaust gas discharged from the engine based on the engine speed and vehicle displacement; and determining the air inflow in the engine cylinder according to the air inflow, the exhaust flow and the exhaust flow.
Optionally, the determining an intake air amount in the engine cylinder based on the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate includes:
M＝Min-Mex+Mf
wherein M represents the intake air amount; minIndicating the intake air flow rate; mexRepresenting the exhaust flow rate; mfRepresenting the exhaust gas flow.
Optionally, the determining a target fuel injection quantity according to the intake air quantity, the detection data and the engine speed includes: determining a basic fuel injection quantity of the engine according to the air intake quantity and the engine speed; and correcting the basic fuel injection quantity according to the detection data to obtain the target fuel injection quantity.
The present disclosure also provides an oil injection control device, the device including: the first acquisition module is used for acquiring the air intake flow and the engine rotating speed of the engine; the second acquisition module is used for acquiring the exhaust flow of the engine; a first determination module for determining an intake air amount in an engine cylinder based on at least the intake air flow rate and the exhaust gas flow rate; a third acquisition module configured to acquire detection data of an oxygen concentration sensor provided in an exhaust line of the engine; the second determination module is used for determining a target fuel injection quantity according to the air inflow, the detection data and the engine rotating speed; and the control module is used for controlling the oil injection nozzle to execute oil injection operation according to the target oil injection quantity.
Optionally, the second obtaining module is configured to obtain an exhaust gas flow rate of the engine through an exhaust gas flowmeter disposed between an exhaust port of the engine and the oxygen concentration sensor.
Optionally, the first determining module includes: a first determination submodule for determining a flow rate of exhaust gas discharged from the engine based on the engine speed and a vehicle displacement; a second determination submodule configured to determine an intake air amount in the engine cylinder based on the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate.
Optionally, the second determination submodule is configured to determine an intake air amount in the engine cylinder from the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate by the following equation:
M＝Min-Mex+Mf
wherein M represents the intake air amount; minIndicating the intake air flow rate; mexRepresenting the exhaust flow rate; mfRepresenting the exhaust gas flow.
Optionally, the second determining module includes: the basic fuel injection quantity determining submodule is used for determining the basic fuel injection quantity of the engine according to the air intake quantity and the engine rotating speed; and the target fuel injection quantity determining submodule is used for correcting the basic fuel injection quantity according to the detection data so as to obtain the target fuel injection quantity.
The present disclosure also provides an oil injection control system, which includes: the intake flowmeter is connected with the first acquisition module and used for detecting the intake air flow of the engine; the oxygen concentration sensor is arranged in an exhaust pipeline of the engine, is connected with the third acquisition module and is used for detecting oxygen concentration data in exhaust gas; the exhaust flowmeter is arranged between an exhaust port of the engine and the oxygen concentration sensor, one end of the exhaust flowmeter is connected with the oxygen concentration sensor, and the other end of the exhaust flowmeter is connected with the second acquisition module and used for detecting the exhaust flow of the engine; the fuel injection control device provided by the disclosure.
The present disclosure also provides a vehicle including the fuel injection control system provided by the present disclosure.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the air inflow in an engine cylinder can be determined by acquiring the air intake flow and the exhaust flow of the engine, then the target fuel injection quantity is determined by combining the detection data of the oxygen concentration sensor and the engine rotating speed, and the fuel injection operation of the fuel injection nozzle is controlled according to the target fuel injection quantity. Through the technical scheme, the air input in the engine cylinder can be accurately known, so that the oil injection quantity of the engine is accurately controlled, the control precision is improved, the exhaust temperature is reduced, and the exhaust emission is reduced.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method of fuel injection control according to an exemplary embodiment.
Fig. 2 is a block diagram of an injection control device according to an exemplary embodiment.
FIG. 3 is a schematic diagram illustrating an injection control system according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a flow chart illustrating a method of fuel injection control according to an exemplary embodiment. As shown in fig. 1, the method may include:
in step 101, an intake air flow rate and an engine speed of an engine are acquired.
In step 102, an exhaust flow rate of the engine is obtained.
In the present disclosure, an intake air flow meter may be provided at an intake port of an intake pipe of the engine for detecting an intake air flow rate of the engine. The engine speed may be detected by an engine speed sensor. An oxygen concentration sensor may be provided in an exhaust line of the engine for detecting the oxygen content in the exhaust gas. In addition, an exhaust gas flow meter may be provided between an exhaust port of an exhaust pipe of the engine and the oxygen concentration sensor for detecting an exhaust gas flow rate of the engine.
In step 103, the amount of intake air in the engine cylinder is determined based on the flow rate of intake air and the flow rate of exhaust gas.
In the present disclosure, the exhaust gas emitted from the engine may include carbon monoxide (CO), Hydrocarbons (HC), nitrogen oxides (NOx), and the like. The exhaust gases from the engine may also include fresh air, which when scavenged may flow in large quantities into the exhaust system. Thus, the exhaust flow rate may include an exhaust flow rate and a fresh air flow rate.
In one embodiment, the amount of intake air in an engine cylinder may be determined in the following manner. The step 103 may include:
first, the flow rate of exhaust gas discharged from the engine is determined based on the engine speed and the vehicle displacement.
For example, the engine-out exhaust gas flow may be determined by the following equation (1):
wherein M isfRepresents the exhaust gas flow rate; v represents the vehicle displacement; n represents the engine speed; at represents the time of two injections of the engineAnd (4) spacing.
Next, the amount of intake air in the engine cylinder is determined from the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate.
For example, the amount of intake air in an engine cylinder may be determined by the following equation (2):
M＝Min-Mex+Mf(2)
wherein M represents the intake air amount; minIndicating the intake air flow rate; mexRepresenting the exhaust flow rate; mfRepresenting the exhaust gas flow.
In step 104, detection data of an oxygen concentration sensor provided in an exhaust line of the engine is acquired.
In step 105, a target fuel injection amount is determined based on the intake air amount, the detection data, and the engine speed.
In the present disclosure, in order to reduce exhaust pollution, a three-way catalytic converter may be provided on the engine. Since the ability of the three-way catalyst to purify carbon monoxide (CO), Hydrocarbons (HC), and nitrogen oxides (NOx) is rapidly reduced when the air-fuel ratio of the mixture gas in the engine cylinder deviates from the stoichiometric air-fuel ratio, an oxygen concentration sensor may be installed in the exhaust line of the engine. The detection data of the oxygen concentration sensor may include the content of oxygen in the exhaust gas, which is characterized as a voltage signal, and the oxygen concentration sensor outputs a high voltage signal to the control unit ECU when the actual air-fuel ratio is less than the theoretical air-fuel ratio, that is, the engine is running with a richer air-fuel mixture; the oxygen concentration sensor outputs a low voltage signal to the control unit ECU when the actual air-fuel ratio is larger than the stoichiometric air-fuel ratio, i.e., when the engine is operating with a leaner mixture.
After the detection data of the oxygen concentration sensor is obtained, the target fuel injection quantity can be determined by combining the air inflow and the engine rotating speed.
In one embodiment, the target fuel injection amount may be determined in the following manner. The step 105 may include:
first, a basic fuel injection amount of the engine is determined based on an intake air amount and an engine speed.
In the present disclosure, the basic fuel injection amount may be determined according to the intake air amount and the engine speed during engine operation.
For example, the basic fuel injection amount of the engine may be determined by the following equation (3):
wherein M isjRepresenting the basic fuel injection quantity, and M representing the air intake quantity; n represents the engine speed; and c represents a proportionality constant which is the reciprocal of the stoichiometric air-fuel ratio.
Next, the basic fuel injection amount is corrected based on the detected data to obtain a target fuel injection amount.
In the present disclosure, the oxygen concentration sensor may be used for closed loop corrective control of the base injection quantity. After the oxygen concentration sensor sends the voltage signal to the control unit ECU, the ECU controls the increase and decrease of the oil injection quantity of the oil injection nozzle, so that the air-fuel ratio of the mixed gas is controlled to be close to a theoretical value, the conversion efficiency of pollutants such as Hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOx) in the exhaust gas can be improved, and the pollutants discharged can be converted and purified to the maximum extent.
In one embodiment, during closed loop correction control, when the actual air-fuel ratio is smaller than the theoretical air-fuel ratio, oxygen is lack in exhaust gas, oxygen ions in a zirconium tube of an oxygen concentration sensor move fast and generate a high voltage signal of about 0.8-1V, the oxygen concentration sensor outputs the high voltage signal to a control unit ECU, and the ECU controls an oil nozzle to reduce basic oil injection quantity; when the actual air-fuel ratio is larger than the theoretical air-fuel ratio, certain oxygen molecules exist in the waste gas, so that the moving capacity of oxygen ions in the zirconium pipe is weakened, the oxygen concentration sensor only generates a low-voltage signal of about 0.1V, the oxygen concentration sensor outputs the low-voltage signal to the control unit ECU, and at the moment, the ECU controls the oil nozzle to increase the basic oil injection quantity.
And correcting the basic fuel injection quantity according to the detection data to obtain the target fuel injection quantity.
For example, the target fuel injection amount may be obtained by the following formula (4):
Mp＝Mj×k+h (4)
wherein M ispRepresenting the target fuel injection quantity; mjRepresents the basic fuel injection amount, h represents a voltage correction amount generated from the detection data of the oxygen concentration sensor; k represents a correction coefficient that can be determined from operating parameters such as intake air temperature, ambient temperature, engine coolant temperature, barometric pressure, altitude, and idle conditions, acceleration conditions, and full load conditions.
In step 106, the fuel injection nozzle is controlled to perform the fuel injection operation according to the target fuel injection amount.
In the disclosure, during engine operation, if the mixture is rich and the actual air-fuel ratio is less than the theoretical air-fuel ratio, the ECU controls the oil nozzle to reduce the oil injection quantity to gradually thin the mixture and increase the actual air-fuel ratio by outputting a high voltage signal from the oxygen concentration sensor; when the actual air-fuel ratio is increased to exceed the theoretical air-fuel ratio, the output voltage of the oxygen concentration sensor is rapidly reduced, namely, a low-voltage signal is output to the ECU, the ECU controls the oil nozzle to increase the oil injection quantity, the mixed gas is gradually enriched until the actual air-fuel ratio is enriched to be lower than the theoretical air-fuel ratio, the output voltage of the oxygen concentration sensor is rapidly increased again, the control unit ECU controls the oil injection quantity to be reduced again, and the closed correction control is circularly performed in such a way. Thus, when the fuel injection nozzle injects fuel at the target fuel injection amount, the process returns to step 101.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the air inflow in an engine cylinder can be determined by acquiring the air intake flow and the exhaust flow of the engine, then the target fuel injection quantity is determined by combining the detection data of the oxygen concentration sensor and the engine rotating speed, and the fuel injection operation of the fuel injection nozzle is controlled according to the target fuel injection quantity. Through the technical scheme, the air input in the engine cylinder can be accurately known, so that the oil injection quantity of the engine is accurately controlled, the control precision is improved, the exhaust temperature is reduced, and the exhaust emission is reduced.
Fig. 2 is a block diagram of an injection control device according to an exemplary embodiment. As shown in fig. 2, the apparatus includes: a first obtaining module 201, configured to obtain an intake air flow rate and an engine speed of an engine; a second obtaining module 202 for obtaining an exhaust flow of the engine; the first determination module 203 is used for determining the air intake amount in the engine cylinder according to the intake air flow acquired by the first acquisition module 201 and the exhaust gas flow acquired by the second acquisition module 202; a third acquisition module 204 configured to acquire detection data of an oxygen concentration sensor provided in an exhaust line of the engine; the second determining module 205 is configured to determine a target fuel injection amount according to the intake air amount obtained by the first determining module 203, the detection data obtained by the third obtaining module 204, and the engine speed obtained by the first obtaining module 201; and a control module 206 for controlling the fuel injector to perform the fuel injection operation based on the target fuel injection amount determined by the second determination module 205.
Optionally, the second obtaining module 202 is configured to obtain an exhaust flow rate of the engine through an exhaust flowmeter disposed between an exhaust port of the engine and the oxygen concentration sensor.
Optionally, the first determining module 203 includes: a first determination submodule for determining a flow rate of exhaust gas discharged from the engine based on the engine speed and a vehicle displacement; a second determination submodule configured to determine an intake air amount in the engine cylinder based on the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate.
Optionally, the second determination submodule is configured to determine an intake air amount in the engine cylinder from the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate by the following equation:
M＝Min-Mex+Mf
wherein M represents the intake air amount; minIndicating the intake air flow rate; mexRepresenting the exhaust flow rate; mfRepresenting the exhaust gas flow.
Optionally, the second determining module 205 includes: the basic fuel injection quantity determining submodule is used for determining the basic fuel injection quantity of the engine according to the air intake quantity and the engine rotating speed; and the target fuel injection quantity determining submodule is used for correcting the basic fuel injection quantity according to the detection data so as to obtain the target fuel injection quantity.
FIG. 3 is a schematic diagram illustrating an injection control system according to an exemplary embodiment. As shown in fig. 3, the system includes: an intake air flow meter 210 for detecting an intake air flow rate of the engine; an oxygen concentration sensor 230 provided in an exhaust line of the engine for detecting oxygen concentration data in exhaust gas; an exhaust gas flow meter 220 provided between an exhaust port of the engine and the oxygen concentration sensor 230, for detecting an exhaust gas flow rate of the engine; the fuel injection control device 200 described above.
The present disclosure also provides a vehicle including the above-mentioned fuel injection control system that the present disclosure provided.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (8)
1. A method of fuel injection control, the method comprising:
acquiring the air intake flow and the engine speed of the engine;
acquiring the exhaust flow of an engine;
determining an intake air amount in a cylinder of the engine based on at least the intake air flow rate and the exhaust gas flow rate;
acquiring detection data of an oxygen concentration sensor provided in an exhaust line of the engine;
determining a target fuel injection quantity according to the air inflow, the detection data and the engine rotating speed;
controlling an oil injection nozzle to perform oil injection operation according to the target oil injection quantity;
wherein, according to the air input, the detection data and the engine speed, determining a target fuel injection quantity comprises:
determining a basic fuel injection quantity of the engine according to the air intake quantity and the engine speed;
and correcting the basic fuel injection quantity according to the detection data by the following formula to obtain the target fuel injection quantity:
Mp＝Mj×k+h
wherein M ispRepresenting the target fuel injection quantity; mjRepresents the basic fuel injection amount, h represents a voltage correction amount generated from the detection data of the oxygen concentration sensor; k represents a correction coefficient.
2. The method of claim 1, wherein said obtaining an exhaust flow of an engine comprises:
the exhaust flow rate of the engine is acquired by an exhaust flowmeter provided between an exhaust port of the engine and the oxygen concentration sensor.
3. The method of claim 1, wherein determining an amount of intake air in an engine cylinder based on at least the intake air flow rate and the exhaust gas flow rate comprises:
determining a flow rate of exhaust gas discharged from the engine based on the engine speed and vehicle displacement;
and determining the air inflow in the engine cylinder according to the air inflow, the exhaust flow and the exhaust flow.
4. The method of claim 3, wherein said determining an intake air amount in the engine cylinder based on the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate comprises:
M＝Min-Mex+Mf
wherein M represents the intake air amount; minIndicating the intake air flow rate; mexRepresenting the exhaust flow rate; mfRepresenting the exhaust gas flow.
5. An injection control apparatus, characterized in that the apparatus comprises:
the first acquisition module is used for acquiring the air intake flow and the engine rotating speed of the engine;
the second acquisition module is used for acquiring the exhaust flow of the engine;
a first determination module for determining an intake air amount in an engine cylinder based on at least the intake air flow rate and the exhaust gas flow rate;
a third acquisition module configured to acquire detection data of an oxygen concentration sensor provided in an exhaust line of the engine;
the second determination module is used for determining a target fuel injection quantity according to the air inflow, the detection data and the engine rotating speed;
the control module is used for controlling the oil injection nozzle to execute oil injection operation according to the target oil injection quantity;
wherein the second determining module comprises:
the basic fuel injection quantity determining submodule is used for determining the basic fuel injection quantity of the engine according to the air intake quantity and the engine rotating speed;
and the target fuel injection quantity determining submodule is used for correcting the basic fuel injection quantity according to the detection data through the following formula so as to obtain the target fuel injection quantity:
Mp＝Mj×k+h
wherein M ispRepresenting the target fuel injection quantity; mjRepresents the basic fuel injection amount, h represents a voltage correction amount generated from the detection data of the oxygen concentration sensor; k represents a correction coefficient.
6. The apparatus of claim 5, wherein the first determining module comprises:
a first determination submodule for determining a flow rate of exhaust gas discharged from the engine based on the engine speed and a vehicle displacement;
a second determination submodule configured to determine an intake air amount in the engine cylinder based on the intake air flow rate, the exhaust gas flow rate, and the exhaust gas flow rate.
7. A fuel injection control system, comprising:
an intake flow meter for detecting an intake flow rate of the engine;
an oxygen concentration sensor provided in an exhaust line of an engine;
an exhaust gas flow meter provided between an exhaust port of the engine and the oxygen concentration sensor, for detecting an exhaust gas flow rate of the engine;
an oil injection control apparatus according to claim 5 or 6.
8. A vehicle comprising the fuel injection control system of claim 7.
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| CN201611141719.2A CN107489552B (en) | 2016-12-12 | 2016-12-12 | Oil injection control method, device and system and vehicle |
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| CN108331672B (en) * | 2018-01-31 | 2021-02-09 | 安徽江淮汽车集团股份有限公司 | Engine part test equipment |
| CN110469416A (en) * | 2019-09-29 | 2019-11-19 | 潍柴动力股份有限公司 | A kind of engine control, control device and engine |
| CN113978209A (en) * | 2021-10-27 | 2022-01-28 | 合肥正浩机械科技有限公司 | Oxygen generation and supply system for high-altitude fuel-powered automobile |
| CN114607515B (en) * | 2022-03-17 | 2023-01-06 | 潍柴动力股份有限公司 | Engine fuel injection control method, device, equipment and storage medium |
| CN116677521B (en) * | 2023-05-25 | 2025-09-19 | 潍柴动力股份有限公司 | EGR flow calculation method and device and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312742A (en) * | 2010-07-05 | 2012-01-11 | 本田技研工业株式会社 | Vehicle is with the fuel injection system of internal-combustion engine |
| CN104704219A (en) * | 2012-06-07 | 2015-06-10 | 标致·雪铁龙汽车公司 | Device for limiting oxygen content in exhaust gases of motor vehicle combustion engine |
| CN104895686A (en) * | 2015-05-07 | 2015-09-09 | 潍柴动力股份有限公司 | Method and system for determining oxygen concentration of exhaust gas of engine |
| EP2921680A1 (en) * | 2014-02-25 | 2015-09-23 | Mitsubishi Jidosha Kogyo K.K. | Apparatus for controlling in-cylinder fuel injection and port fuel injection amounts of an internal combustion engine |
| CN105736206A (en) * | 2016-03-29 | 2016-07-06 | 湖南大学 | Online detection method and device for cyclic fuel injection quantity of engine under variable working conditions |
-
2016
- 2016-12-12 CN CN201611141719.2A patent/CN107489552B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312742A (en) * | 2010-07-05 | 2012-01-11 | 本田技研工业株式会社 | Vehicle is with the fuel injection system of internal-combustion engine |
| CN104704219A (en) * | 2012-06-07 | 2015-06-10 | 标致·雪铁龙汽车公司 | Device for limiting oxygen content in exhaust gases of motor vehicle combustion engine |
| EP2921680A1 (en) * | 2014-02-25 | 2015-09-23 | Mitsubishi Jidosha Kogyo K.K. | Apparatus for controlling in-cylinder fuel injection and port fuel injection amounts of an internal combustion engine |
| CN104895686A (en) * | 2015-05-07 | 2015-09-09 | 潍柴动力股份有限公司 | Method and system for determining oxygen concentration of exhaust gas of engine |
| CN105736206A (en) * | 2016-03-29 | 2016-07-06 | 湖南大学 | Online detection method and device for cyclic fuel injection quantity of engine under variable working conditions |
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| CN107489552A (en) | 2017-12-19 |
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Denomination of invention: Fuel injection control method, device, system and vehicle Effective date of registration: 20211213 Granted publication date: 20200918 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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Date of cancellation: 20231201 Granted publication date: 20200918 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd.|Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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