CN114320638B

CN114320638B - Air-fuel ratio determining method, device, storage medium and equipment

Info

Publication number: CN114320638B
Application number: CN202111615995.9A
Authority: CN
Inventors: 陈鬃; 方芳
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-11-08
Anticipated expiration: 2041-12-27
Also published as: CN114320638A

Abstract

The application discloses air-fuel ratio confirms method, device, storage medium and equipment, and through the technical scheme that this application embodiment provided, confirm the air-fuel ratio through confirming required theoretical oxygen volume of burning target fuel and actual combustion volume, the determination of air-fuel ratio is more accurate and convenient, and follow-up calibration oxygen sensor characteristic line is also more convenient.

Description

Air-fuel ratio determining method, device, storage medium and equipment

Technical Field

The application belongs to the technical field of vehicle engineering, and particularly relates to an air-fuel ratio determining method, an air-fuel ratio determining device, a storage medium and air-fuel ratio determining equipment.

Background

The control parameters in the engine controller need to be repeatedly calibrated and optimized before the new vehicle type comes into the market, so that the requirements of environmental protection, oil consumption, reliability, durability, user experience and the like are met. Among them, the emission control of the engine is closed-loop adjustment based on a deviation between an actual air-fuel ratio and a target air-fuel ratio, and the closed-loop adjustment has an extremely significant influence on the emission control. The oxygen sensor senses different exhaust components to obtain corresponding pump current, and obtains the actual air-fuel ratio of a specific working condition according to the characteristic line of the oxygen sensor for closed-loop control, so that the emission is optimized. However, when the characteristic line of the oxygen sensor is calibrated, the accurate air-fuel ratio of the engine needs to be obtained, and the difficulty in obtaining the air-fuel ratio in the related technology is high.

Disclosure of Invention

The application discloses an air-fuel ratio determining method, device, storage medium and equipment, which are used for obtaining the air-fuel ratio of an engine based on the type of fuel used by a vehicle and exhaust gas generated during operation.

In one aspect, an embodiment of the present application provides an air-fuel ratio determination method, including:

acquiring the consumed fuel quantity and the concentration of generated exhaust gas when the vehicle runs under a target working condition;

acquiring the number of carbon atoms, hydrogen atoms and oxygen atoms in a chemical formula of target fuel oil, wherein the target fuel oil is fuel oil consumed when the vehicle runs;

determining the theoretical oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel and the fuel amount;

determining the actual oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and environmental parameters;

and determining the air-fuel ratio of the vehicle when the vehicle runs under the target working condition based on the actual oxygen amount and the theoretical oxygen amount.

In one possible embodiment, the determining the actual amount of oxygen consumed by the vehicle when operating under the target operating condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel, and the environmental parameter includes:

based on the environment parameters, acquiring an air physical coefficient and an air component coefficient, wherein the air physical coefficient is used for indicating the ratio of the quantity of the substances of specific humidity and oxygen in the environment, and the air component coefficient is used for representing the ratio of the quantity of the substances among nitrogen, oxygen and carbon dioxide in the environment;

and determining the actual oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the air physical coefficient, the air component coefficient, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the concentration of the exhaust gas.

In one possible embodiment, the determining the actual amount of oxygen consumed by the vehicle when operating under the target operating condition based on the air physical coefficient, the air composition coefficient, the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel, and the concentration of the exhaust gas includes:

under the condition that the difference value between the actual oxygen amount and the target oxygen amount determined in the last iteration process is larger than or equal to the difference threshold value, the following steps are executed:

acquiring a molar balance parameter based on the number of carbon atoms in the molecular formula of the target fuel oil, the air component coefficient, the concentration of the exhaust gas and the actual oxygen amount determined in the last iteration process;

determining a trim factor for carbon dioxide in the exhaust gas based on the concentration of carbon dioxide in the exhaust gas and the molar balance parameter;

determining a trim factor for carbon monoxide in the exhaust gas based on the concentration of carbon monoxide in the exhaust gas and the molar balance parameter;

determining a trim factor for hydrocarbons in the exhaust gas based on the concentration of hydrocarbons in the exhaust gas, the concentration of the target fuel in the exhaust gas, and the molar balance parameter;

determining a trim factor for the nitrogen oxides in the exhaust gas based on the concentration of the nitrogen oxides in the exhaust gas and the molar balance parameter;

determining a balancing coefficient of water in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel oil, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient, the balancing coefficient of the carbon dioxide, the balancing coefficient of the carbon monoxide and an equilibrium constant;

determining a balancing coefficient of hydrogen in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel oil, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient and the balancing coefficient of water;

determining a trim factor for oxygen in the exhaust gas based on the concentration of oxygen in the exhaust gas and the molar balance parameter;

determining a balancing coefficient of nitrogen in the exhaust gas based on the actual oxygen amount, the air composition coefficient and the balancing coefficient of the oxynitride determined in the last iteration process;

determining an actual amount of oxygen consumed by the vehicle when operating under the target operating condition based on the carbon dioxide trim factor, the carbon monoxide trim factor, the hydrocarbon trim factor, the nitrogen oxide trim factor, the water trim factor, the hydrogen trim factor, the oxygen trim factor, the nitrogen trim factor, the number of oxygen atoms in the chemical formula of the target fuel, the air physical factor, and the air composition factor.

In one possible embodiment, the determining the theoretical amount of oxygen consumed by the vehicle when operating under the target operating condition based on the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel and the fuel amount comprises:

determining the unit oxygen amount required for completely combusting the unit substance amount of the target fuel oil based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil;

and determining the theoretical oxygen consumption of the vehicle when the vehicle operates under the target working condition based on the unit oxygen amount and the fuel oil amount.

In one possible implementation, the determining an air-fuel ratio of the vehicle when operating under the target operating condition based on the actual oxygen amount and the theoretical oxygen amount comprises:

and determining the ratio of the actual oxygen amount to the theoretical oxygen amount as the air-fuel ratio of the vehicle when the vehicle runs under the target working condition.

In a possible implementation manner, the obtaining of the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel includes:

acquiring an oil product report of the target fuel oil;

and acquiring the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil from the oil product report.

In one possible embodiment, after determining the air-fuel ratio of the vehicle when operating under the target operating condition based on the actual oxygen amount and the theoretical oxygen amount, the method further comprises:

and calibrating the pump current of the oxygen sensor of the vehicle under the target working condition based on the air-fuel ratio of the vehicle when the vehicle runs under the target working condition.

In one possible embodiment, the exhaust gas includes at least one of hydrocarbon, carbon oxide, oxygen, nitrogen oxide, water, and the target fuel that is not completely combusted.

In one aspect, an embodiment of the present application provides an air-fuel ratio determination apparatus, including:

the concentration acquisition module is used for acquiring the consumed fuel quantity and the concentration of the generated exhaust gas when the vehicle runs under the target working condition;

the number acquisition module is used for acquiring the number of carbon atoms, hydrogen atoms and oxygen atoms in a chemical formula of target fuel oil, wherein the target fuel oil is fuel oil consumed when the vehicle runs;

the theoretical oxygen amount obtaining module is used for determining the theoretical oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the fuel oil amount;

the actual oxygen amount obtaining module is used for determining the actual oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the environmental parameters;

and the air-fuel ratio determining module is used for determining the air-fuel ratio of the vehicle when the vehicle runs under the target working condition based on the actual oxygen amount and the theoretical oxygen amount.

In a possible implementation, the actual oxygen amount obtaining module is configured to obtain an air physical coefficient and an air composition coefficient based on the environment parameter, the air physical coefficient is used for indicating a ratio of the amounts of the substances of the specific humidity and the oxygen in the environment, and the air composition coefficient is used for indicating a ratio of the amounts of the substances among the nitrogen, the oxygen and the carbon dioxide in the environment; and determining the actual oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the air physical coefficient, the air component coefficient, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the concentration of the exhaust gas.

In a possible embodiment, the actual oxygen amount obtaining module is configured to, in a case that a difference between the actual oxygen amount determined in the last iteration process and the target oxygen amount is greater than or equal to a difference threshold, perform the following steps:

determining a balancing coefficient of hydrocarbons in the exhaust gas based on the concentration of hydrocarbons in the exhaust gas, the concentration of the target fuel in the exhaust gas, and the molar balance parameter;

determining a trim factor for the nitrogen oxide in the exhaust gas based on the concentration of the nitrogen oxide in the exhaust gas and the molar balance parameter;

determining an actual amount of oxygen consumed by the vehicle when operating at the target operating condition based on the carbon dioxide trim factor, the carbon monoxide trim factor, the hydrocarbon trim factor, the nitrogen oxide trim factor, the water trim factor, the hydrogen trim factor, the oxygen trim factor, the nitrogen trim factor, the number of oxygen atoms in the chemical formula of the target fuel, the air physical factor, and the air composition factor.

In a possible embodiment, the theoretical oxygen amount obtaining module is configured to determine a unit oxygen amount required for complete combustion of a unit substance amount of the target fuel based on the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel; and determining the theoretical oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the unit oxygen amount and the fuel oil amount.

In one possible embodiment, the air-fuel ratio determining module is configured to determine a ratio of the actual oxygen amount and the theoretical oxygen amount as the air-fuel ratio of the vehicle operating under the target operating condition.

In a possible implementation manner, the number obtaining module is used for obtaining an oil product report of the target fuel oil; and acquiring the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil from the oil product report.

In a possible embodiment, the apparatus further comprises:

and the calibration module is used for calibrating the pump current of the oxygen sensor of the vehicle under the target working condition based on the air-fuel ratio of the vehicle under the target working condition.

In one aspect, an electronic device is provided, and the electronic device includes:

at least one processor and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the aforementioned air-fuel ratio determination method.

In one aspect, a non-transitory computer readable storage medium stores computer instructions for causing a computer to execute the aforementioned air-fuel ratio determination method.

In one aspect, the present application also provides a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when executed by a computer, cause the computer to execute the foregoing air-fuel ratio determination method.

Through the technical scheme that this application embodiment provided, confirm the air-fuel ratio through confirming the required theoretical oxygen volume of burning target fuel and actual combustion volume, the determination of air-fuel ratio is more accurate and convenient, and follow-up calibration oxygen sensor characteristic line is also more convenient.

Drawings

To more clearly explain the technical solutions of the present application and to facilitate a further understanding of the technical effects, technical features and objects of the present application, the present application will be described in detail with reference to the accompanying drawings, which form an essential part of the present specification, and which are used to explain the technical solutions of the present application together with the embodiments of the present application, but do not limit the present application.

FIG. 1 is a schematic diagram of an implementation environment provided by an embodiment of the present application;

FIG. 2 is a flow chart of a method for determining an air-fuel ratio according to an embodiment of the present disclosure;

FIG. 3 is a flow chart of a method for determining an air-fuel ratio according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an air-fuel ratio determining apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. The application is capable of other and different embodiments and its several details are capable of modifications and various changes in detail without departing from the spirit of the application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, a worker of ordinary skill in the art would recognize that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application in a schematic manner, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, the form, quantity and proportion of the components in actual implementation can be changed freely, and the layout of the components can be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

Fig. 1 is a schematic diagram of an implementation environment of an air-fuel ratio determining method provided in an embodiment of the present application, and referring to fig. 1, the implementation environment includes an in-vehicle terminal 110 and an electronic device 140.

The in-vehicle terminal 110 is connected to the electronic device 140 through a wireless network or a wired network.

The electronic device 140 is a calibration device used in a vehicle workshop, or in a remote calibration scenario, the electronic device 140 is an independent physical server, or a server cluster or distributed system formed by a plurality of physical servers, or a cloud server providing basic cloud computing services such as cloud service, a cloud database, cloud computing, a cloud function, cloud storage, network service, cloud communication, middleware service, domain name service, security service, a distribution network (CDN), and a big data and artificial intelligence platform.

Optionally, the vehicle-mounted terminal 110 generally refers to one of a plurality of electronic devices, and the embodiment of the application is only illustrated by the vehicle-mounted terminal 110.

Those skilled in the art will appreciate that the number of electronic devices described above may be greater or fewer. For example, the number of the electronic devices is only one, or the number of the electronic devices is tens or hundreds, or more, and in this case, other electronic devices are also included in the implementation environment. The number and the type of the electronic devices are not limited in the embodiments of the present application.

After the description of the implementation environment of the embodiment of the present application, an application scenario of the embodiment of the present application is described below.

The air-fuel ratio determining method provided by the embodiment of the application can be applied to the scene of calibrating the characteristic line of the vehicle oxygen sensor, wherein the calibration comprises the calibration when the vehicle leaves a factory and the calibration when the vehicle is maintained, and the method is not limited by the embodiment of the application. Of course, the air-fuel ratio determining method provided by the embodiment of the application can be applied to the scene of calibrating the characteristic curve of the vehicle oxygen sensor, and can also be applied to other scenes, such as the scene of vehicle detection, or other scenes needing to acquire the air-fuel ratio of the vehicle.

Under the scene of calibrating the characteristic line of the vehicle oxygen sensor, a worker can place the vehicle in a laboratory, place the vehicle in different working conditions through the vehicle-mounted terminal 110, where the working conditions refer to the engine speed and the engine load, and obtain information uploaded by the vehicle-mounted terminal 110 through the electronic device 140. The operator queries the formula of the target fuel used by the vehicle via the electronic device 140 and calculates the theoretical amount of oxygen required to completely combust the target fuel via the electronic device 140. The method comprises the steps that a worker controls a vehicle to run under a target working condition, exhaust gas of the vehicle under the target working condition is collected, components of the exhaust gas are analyzed through a gas analysis instrument, and the concentration of each component in the exhaust gas is obtained, wherein the concentration refers to the mole number. The electronics 140 determine the actual amount of oxygen consumed by the vehicle when operating at the target operating conditions based on the concentration of the various components in the exhaust gas, the current laboratory environmental parameters, and the number of carbon, hydrogen, and oxygen atoms in the target fuel chemical formula. The electronics 140 divides the theoretical oxygen amount by the actual oxygen amount to obtain the air-fuel ratio of the vehicle operating at the target operating condition. After obtaining the air-fuel ratio of the vehicle operating under the target operating condition, the operator can calibrate the characteristic line of the vehicle oxygen sensor through the electronic device 140. And when other working conditions need to be calibrated, repeating the steps.

After the implementation environment and the application scenario of the embodiment of the present application are introduced, an air-fuel ratio determining method provided by the embodiment of the present application is described below, with reference to fig. 2, taking an execution subject as an electronic device as an example, and the method includes:

201. the electronic device obtains the amount of fuel consumed and the concentration of exhaust gas produced when the vehicle is operating at the target operating condition.

The target working condition is the working condition selected by the operator, and the working condition refers to the engine speed and the engine load. The fuel quantity consumed when the vehicle runs under the target working condition is acquired by the vehicle-mounted terminal and then uploaded to the electronic equipment, or acquired among the electronic equipment, and the embodiment of the application does not limit the fuel quantity. The generated exhaust gas is collected by staff, and the electronic equipment analyzes the exhaust gas together through gas analysis to obtain the concentration of the exhaust gas.

202. The electronic equipment acquires the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel, wherein the target fuel is the fuel consumed by the vehicle during operation.

The target fuel is mixed fuel, and the chemical formula of the target fuel can be regarded as the average chemical formula of the fuel mixture.

203. And the electronic equipment determines the theoretical oxygen consumption amount of the vehicle when the vehicle runs under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel and the fuel amount.

The theoretical oxygen amount is the amount of oxygen consumed when the target fuel is completely combusted, and the oxygen amount can be derived from the chemical formula of the target fuel.

204. And the electronic equipment determines the actual oxygen consumption of the vehicle when the vehicle runs under the target working condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the environmental parameters.

The environmental parameter is also an environmental parameter of a laboratory. In some embodiments, the environmental parameter comprises specific humidity H _abs Ambient oxygen concentration [ O ] ₂ ] _amb Ambient nitrogen concentration [ N ₂ ] _amb Ambient carbon dioxide concentration [ CO ] ₂ ] _amb Equilibrium constant K and water concentration [ H ₂ O]Since the laboratory environment is considered to be a dry environment, and the water concentration [ H ] ₂ O]＝0。

205. The electronic device determines an air-fuel ratio of the vehicle when operating at the target operating condition based on the actual oxygen amount and the theoretical oxygen amount.

Wherein the air-fuel ratio reflects the combustion condition of the target fuel.

The above steps 201-205 are simple descriptions of the air-fuel ratio determining method provided in the embodiment of the present application, and the following describes the air-fuel ratio determining method provided in the embodiment of the present application in detail with reference to some examples, and with reference to fig. 3, the method includes:

301. the electronic device obtains the amount of fuel consumed and the concentration of exhaust gas produced when the vehicle is operating under the target operating condition.

The target working condition is the working condition selected by the operator, and the working condition refers to the engine speed and the engine load. The fuel quantity consumed when the vehicle runs under the target working condition is acquired by the vehicle-mounted terminal and then uploaded to the electronic equipment, or is directly acquired by the electronic equipment, and the embodiment of the application does not limit the fuel quantity. The generated exhaust gas is collected by staff, and the electronic equipment analyzes the exhaust gas together through gas analysis to obtain the concentration of the exhaust gas.

In some embodiments, the exhaust gas includes at least one of hydrocarbons, oxygen, nitrogen oxides, water, and the target fuel that is not completely combusted. Wherein the carbon oxide compound comprises carbon monoxide CO and carbon dioxide CO ₂ Oxynitride, denoted NO _x Comprising nitric oxide NO, nitrogen dioxide NO ₂ Dinitrogen tetroxide N ₂ O ₄ And the like.

In one possible embodiment, the vehicle is operated by the operator in the target operating condition through the vehicle-mounted terminal or the electronic device. The electronic equipment obtains the fuel quantity in a fuel tank of the vehicle at a first moment through a fuel measuring instrument on the vehicle, and obtains the current fuel quantity in the fuel tank of the vehicle when the vehicle runs to a second moment under the target working condition, wherein the difference value between the fuel quantity at the first moment and the fuel quantity at the second moment is the consumed fuel quantity when the vehicle runs under the target working condition. The time period between the first time and the second time is also the time period of the experiment, and the first time and the second time are set by the staff according to the actual situation, which is not limited in the embodiment of the present application. The staff collects the gas discharged when the vehicle runs under the target working condition through bench test or hub test on the vehicle. The electronic device obtains the concentration of the exhaust gas through the gas analyzer, that is, the electronic device obtains the concentration of the hydrocarbon, the oxygen, the oxynitride and the incompletely combusted target fuel oil in the exhaust gas through the gas analyzer, where the concentration refers to the number of moles or the amount of the substance. In some embodiments, the gas analysis instrument is a Horiba analyzer.

It should be noted that, in the above step 301, the electronic device is used to obtain the amount of fuel consumed and the concentration of the generated exhaust gas when the vehicle operates in the target operating condition as an example, in other possible embodiments, the electronic device can also obtain the amount of fuel consumed and the concentration of the generated exhaust gas when the vehicle operates in other operating conditions by the above method, which is not limited by the embodiment of the present application.

302. The electronic equipment acquires the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel, wherein the target fuel is the fuel consumed by the vehicle during operation.

In one possible embodiment, the electronics obtain a fuel report for the target fuel. And the electronic equipment acquires the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel from the oil product report.

In the above embodiment, the fuel level report of the target fuel is obtained by an electronic device. The electronic device obtains the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel from the fuel report by way of example, but in other possible implementations, a technician may calculate the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel according to the fuel report of the target fuel, and the example of the application is not limited thereto.

The oil product report is also called an oil product inspection report, and is obtained by analyzing components of the oil product when the oil product leaves a factory or after the oil product is received, and the properties, components and other parameters of the fuel oil are recorded in detail in the oil product report.

For example, the electronic device obtains an oil product report of the target fuel, identifies the oil product report, and converts the molar mass percentages of carbon, hydrogen, and oxygen in the fuel in the oil product report into a number ratio, where the number ratio is set as the number of carbon atoms, hydrogen atoms, and oxygen atoms. For example, the target fuel oil has a formula of C _x H _y O _z Wherein x =1, y =1.817, z =0.

In a possible implementation manner, the electronic device performs component analysis on the target fuel through a fuel component analysis instrument to obtain the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel.

303. And the electronic equipment determines the theoretical oxygen consumption amount of the vehicle when the vehicle runs under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel and the fuel amount.

The theoretical oxygen amount is the amount of oxygen consumed when the target fuel oil is completely combusted, and the oxygen amount can be derived from the chemical formula of the target fuel oil, wherein the oxygen amount is the amount of oxygen substances and is expressed in molar units.

In one possible embodiment, the electronic device determines the amount of unit oxygen required to completely combust a unit of substance based on the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel. And the electronic equipment determines the theoretical oxygen consumption of the vehicle when the vehicle operates under the target working condition based on the unit oxygen amount and the fuel oil amount.

For example, the electronic device constructs a chemical reaction equation when the target fuel is combusted based on the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel. And the electronic equipment performs balancing on the chemical reaction equation to obtain the unit oxygen amount required by the target fuel oil. And the electronic equipment determines the theoretical oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the unit oxygen amount and the fuel oil amount.

For example, taking 1 mole of target fuel as an example, the chemical reaction equation generated by burning the target fuel is as follows (1):

C _x H _y O _z +O ₂ →CO ₂ +H ₂ O(1)

the equation obtained after the above reaction is balanced for carbon C, hydrogen H and oxygen O is as follows (2):

from the above equation, the amount of oxygen species required for complete combustion of the target fuel equivalent is shown in the following equation (3):

n _stoich i.e., the amount of oxygen consumed when the target fuel is completely combusted.

Whereas actual air consists mainly of oxygen and nitrogen and contains approximately 1.8% argon, 0.035% CO ₂ . These inert gases do not participate in the combustion and react with the unreacted N ₂ Are mixed together. CO herein ₂ The content of (A) is extremely small, and the deviation of 0.2% caused by it is negligible. To obtain an equation that characterizes ideal dry gas and fuel combustion, the following equation (4) can be used to represent: (assuming a 20.95% concentration of oxygen in air):

304. and the electronic equipment determines the actual oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the environmental parameters.

The environmental parameter is also an environmental parameter of a laboratory. In some embodiments, the environmental parameter comprises specific humidity H _abs Ambient oxygen concentration [ O ] ₂ ] _amb Ambient nitrogen concentration [ N ₂ ] _amb Ambient carbon dioxide concentration [ CO ] ₂ ] _amb Equilibrium constant K and water concentration H ₂ O _cooler 。

In one possible implementation, the electronic device obtains, based on the environment parameter, an air physical coefficient indicating a ratio of the amounts of substances relative to humidity and oxygen in the environment and an air composition coefficient indicating a ratio of the amounts of substances between nitrogen, oxygen, and carbon dioxide in the environment. And the electronic equipment determines the actual oxygen consumption of the vehicle when the vehicle runs under the target working condition based on the air physical coefficient, the air component coefficient, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the concentration of the exhaust gas.

In order to more clearly explain the above embodiment, the above embodiment will be explained in two parts.

The first section, the electronic device, based on the environmental parameter, obtains an air physical coefficient indicating a ratio of the amounts of substances relative to humidity and oxygen in the environment, and an air composition coefficient indicating a ratio of the amounts of substances between nitrogen, oxygen, and carbon dioxide in the environment.

For example, the environmental parameter includes specific humidity H _abs Ambient oxygen concentration [ O ] ₂ ] _amb Ambient nitrogen concentration [ N ₂ ] _amb Ambient carbon dioxide concentration [ CO ] ₂ ] _amb Equilibrium constant K and water concentration [ H ₂ O]Since the laboratory environment is considered to be a dry environment, the water concentration [ H ] ₂ O]=0. The air composition factor comprises a first air composition factor and a second air composition factor, the first air composition factor is the ambient nitrogen concentration [ N ₂ ] _amb With ambient oxygen concentration [ O ₂ ] _amb Ratio of (A to (B)Value, second air composition coefficient, ambient carbon dioxide concentration [ CO ] ₂ ] _amb With ambient oxygen concentration [ O ₂ ] _amb The ratio of (a) to (b). The air physical coefficient is a first value and a specific humidity H _abs Multiplied by the ambient oxygen concentration [ O ] ₂ ] _amb Wherein the first value is 0.00160757.

The first air component number is marked as A, then

The second air component number is denoted as B, then

The physical coefficient of air is recorded as C, then

In some embodiments, specific humidity H _abs See the following equations (5) and (6):

the following analysis is carried out in combination with the actual situation of the target fuel when burning:

1. the target fuel is often combusted in the engine under oxygen-deficient conditions, when CO is present ₂ And H ₂ O will decompose to produce some CO and H ₂ ；

2. Not all of the target fuel oil is involved in combustion, and some of the target fuel oil not involved in combustion may exist in the exhaust gas in the form of hydrocarbons, and furthermore, when the mixture is in a lean state, excess oxygen may be generated in the exhaust gas;

3. a portion of the nitrogen from the ambient air will be generated at the high temperature and pressure of the combustion chamberReacting to form NO and NO ₂ . And NO will be available for its analyzer ₂ Converted to NO and the sample in the analyzer can therefore be considered NO.

4. CO present in the air ₂ There was a slight influence (around 0.2%) on the calculation results. Usually different people use O ₂ ，N ₂ And CO ₂ The ratio of (a) to (b) is also slightly different.

After combining the above analysis, the resulting combustion chemistry equation is given by the following formula (7):

C _x H _y O _z +n(O ₂ +A·N ₂ +B·CO ₂ +C·H _abs ·H ₂ O)→aCO ₂ +bCO+

cH ₂ +dH ₂ O+eO ₂ +fN ₂ +gNO _x +hC _x′ H _y′ O _z′ (7)

wherein, C _x′ H _y′ O _z′ Is the molecular formula of the target fuel oil which is not completely combusted in the exhaust gas and the molecular formula C of the target fuel oil _x H _y O _z The same is true.

In the second section below, the electronic device is dedicated to trim equation (7) above.

And a second part, determining the actual oxygen consumption of the vehicle when the vehicle runs under the target working condition by the electronic equipment based on the air physical coefficient, the air component coefficient, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the concentration of the exhaust gas.

In one possible implementation, the electronic device determining the actual oxygen amount includes a plurality of iterative processes, and in a case that a difference between the actual oxygen amount determined in the last iterative process and the target oxygen amount is greater than or equal to a difference threshold, the following steps are performed:

1. and the electronic equipment acquires the molar balance parameter based on the number of carbon atoms in the molecular formula of the target fuel oil, the air component coefficient, the concentration of the exhaust gas and the actual oxygen amount determined in the last iteration process.

For example, the electronic device obtains the molar balance parameter based on the following equation (8):

n _tot ＝(x+B*n)/(CO ₂ /100+CO/1000000+HC/1000000)*(1–H ₂ O _cooler )(8)

wherein n is _tot Is a molar balance parameter, x is the number of carbon atoms in the molecular formula of the target fuel oil, B is a second air component coefficient, n is the actual oxygen amount determined in the last iteration process, and CO ₂ For discharging CO in gas ₂ CO is the concentration of CO in the exhaust gas in ppm, HC is the concentration of HC in the exhaust gas in ppm, H ₂ O _cooler The water concentration in the air is 0 in the dry gas.

2. The electronic device determines a trim factor for carbon dioxide in the exhaust gas based on the concentration of carbon dioxide in the exhaust gas and the molar balance parameter.

For example, the electronic device obtains the balancing coefficient of carbon dioxide based on the following formula (9):

a＝CO ₂ /100*n _tot /(1–H ₂ O _cooler )(9)

wherein a is the balancing coefficient of carbon dioxide.

3. The electronic device determines a balancing coefficient of carbon monoxide in the exhaust gas based on the concentration of carbon monoxide in the exhaust gas and the molar balance parameter.

For example, the electronic device obtains the balancing coefficient of carbon monoxide based on the following formula (10):

b＝CO/1000000*n _tot /(1–H ₂ O _cooler )(10)

wherein b is the balancing coefficient of carbon monoxide.

4. The electronics determine a trim factor for hydrocarbons in the exhaust gas based on the concentration of hydrocarbons in the exhaust gas, the concentration of the target fuel in the exhaust gas, and the molar balance parameter.

For example, the electronic device obtains the balancing coefficient of the hydrocarbon based on the following formula (11):

h＝HC/1000000*n _tot /(1–H ₂ O _cooler )/x’(11)

where h is the hydrocarbon trim coefficient, and x' is the number of carbon atoms in the chemical formula of the target fuel in the exhaust gas, i.e., the concentration of unburned target fuel.

5. The electronic device determines a trim factor for the nitrogen oxide in the exhaust gas based on the concentration of the nitrogen oxide in the exhaust gas and the molar balance parameter.

For example, the electronic device obtains the trim coefficient of the oxynitride based on the following formula (12):

g＝NO _X /1000000*n _tot /(1–H ₂ O _cooler )(12)

wherein NO _X G is the trim factor of the nitrogen oxide, which is the concentration of nitrogen oxides in the exhaust gas.

6. The electronic device determines a balancing coefficient of water in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel, the balancing coefficient of the hydrocarbon, the actual amount of oxygen determined in the last iteration process, the air physical coefficient, the balancing coefficient of the carbon dioxide, the balancing coefficient of the carbon monoxide, and an equilibrium constant.

For example, the electronic apparatus obtains the balancing coefficient of water in the exhaust gas based on the following formula (13):

d＝(y–y’*h+2*n*C)/(2*(b/(a*K)+1))(13)

where y is the number of hydrogen atoms in the chemical formula of the target fuel, d is the trim coefficient for water in the exhaust gas, C is the physical coefficient for air, K is an equilibrium constant, typically 3.5, and y' is the number of hydrogen atoms in the chemical formula of the target fuel in the exhaust gas.

7. The electronic equipment determines the balancing coefficient of the hydrogen in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient and the balancing coefficient of the water.

For example, the electronic apparatus obtains the balancing coefficient of hydrogen in the exhaust gas based on the following formula (14):

c＝(y–y’*h)/2+n*C–d(14)

wherein c is the trim coefficient of hydrogen in the exhaust gas.

8. The electronic device determines a trim factor for oxygen in the exhaust gas based on the concentration of oxygen in the exhaust gas and the molar balance parameter.

For example, the electronic device obtains the balancing coefficient of oxygen in the exhaust gas based on the following formula (15):

e＝O ₂ /100*n _tot /(1–H ₂ O _cooler )(15)

wherein e is the balancing coefficient of oxygen in the exhaust gas.

9. The electronic device determines a trim factor for nitrogen in the exhaust gas based on the actual amount of oxygen, the air composition factor, and the trim factor for the oxynitride determined by the last iteration.

For example, the electronic apparatus obtains the trim coefficient of nitrogen in the exhaust gas based on the following formula (16):

f＝n*A–g/2(16)

wherein f is the trim coefficient of nitrogen in the exhaust gas.

10. The electronic device determines the actual amount of oxygen consumed by the vehicle when the vehicle operates under the target working condition based on the carbon dioxide balancing coefficient, the carbon monoxide balancing coefficient, the hydrocarbon balancing coefficient, the oxynitride balancing coefficient, the water balancing coefficient, the hydrogen balancing coefficient, the oxygen balancing coefficient, the nitrogen balancing coefficient, the number of oxygen atoms in the chemical formula of the target fuel, the air physical coefficient and the air composition coefficient.

For example, the electronic device obtains the actual amount of oxygen consumed by the vehicle operating in the target operating condition based on the following equation (17):

n＝(2*a+b+d+2*e+g+z’*h-z)/(2+C+2*B)(17)

and n is the actual oxygen amount consumed by the vehicle when the vehicle operates under the target working condition.

The principle of the steps 1 to 10 is as follows:

A. to determine n, a series of unknown quantities of a substance can be obtained by a balancing equation, totaling 5 equations: of which 4 are the atomic equilibrium (C, H, O, N) equation and 1 total molar equilibrium equation.

Carbon balance equation:

x+n·B＝a+b+x′·h；

hydrogen equilibrium equation:

2·n·C·H _abs +y＝2·c+2·d+y′·h；

an oxygen balance method:

z+2n+2n·B+n·C·H _abs ＝2a+b+d+2e+g+z′·h；

nitrogen balance equation:

2·n·A＝2f+g；

total molar balance (dry environment):

n _tot ＝a+b+c+e+f+g+h；

B. HC, CO can be measured using a gas analyzer ₂ ，O ₂ And NO _x The concentration of (3) herein refers to a ratio of moles. Because the emissions were measured in a dry environment in the analyzer, the sample was also considered dry and moisture free. The concentration can be calculated by mole expressed as the following equation (

Is the moles of water remaining after the gas passes through the cooler and X may represent any measured species).

The water vapor concentration at the cooler temperature is known as follows using the ideal gas equation of state:

with CO ₂ For example, the following steps are carried out:

obtained by transforming the above formula

The [ HC ] concentration measured by the analyzer, i.e. the concentration of hydrocarbons in the reactants, is known from the infrared spectrometer FID technique, and therefore its composition is calculated as follows:

this formula can be converted into

h＝[HC]·(n _tot +d)/x′；

Since the above carbon balance equation (3) only contains known parameters and measured CO ₂ The number of moles calculated for the concentrations of CO and HC, and finally n can be calculated _tot ：

There are four unknown variables n, c, d, and f and four equations left. N can be calculated relatively easily by the oxygen balance equation:

to calculate the air-fuel ratios lambda and n, an expression for the number of moles d of water is calculated.

C. When the rich mixed gas is combusted in a cylinder, CO in the mixed gas can be caused by high temperature and high pressure ₂ And H ₂ O is decomposed to generate H ₂ And CO. The water/gas reaction is described below by the chemical equation. These substances reach an equilibrium, which can be described by the equilibrium coefficient K.

CO ₂ +H ₂ →CO+H ₂ O；

The value of K depends on the combustion temperature, which usually corresponds to a value of 3.5 for gasoline engines.

The number of moles of hydrogen, c, can then be calculated by the hydrogen equilibrium equation:

an expression for the number of moles of water can be derived from the above two equations:

the nitrogen balance method can be used for obtaining:

D. in summary, it can be seen that the calculation of n and d in the above equation is cyclic, so that a fixed iterative formula can be programmed and processed by a computer, and the actual air-fuel ratio can be easily calculated according to the emissions. It only needs to assume an initial n to calculate d, then obtain a new n, and repeat the loop until the new n is smaller than n _ old, and the calculation is finished. The logic is as follows:

(1) assume that the initial values of n and d are both 1.0;

(2) according to HC, CO and CO ₂ Is calculated by formula 8, n is calculated _tot 。

(3) Calculating a water trim coefficient d of water by equation 13;

(4) calculating n by the total nitrogen balance equation 17;

(5) this n is compared with the previous n and if the difference is small, the next step is performed. Otherwise, returning to calculate n again from the second step _tot The loop calculation is started.

305. The electronic device determines an air-fuel ratio of the vehicle when operating at the target operating condition based on the actual oxygen amount and the theoretical oxygen amount.

In one possible embodiment, the electronic device determines the ratio of the actual oxygen amount and the theoretical oxygen amount as the air-fuel ratio of the vehicle operating under the target operating condition.

For example, the electronic device obtains the air-fuel ratio of the vehicle operating under the target operating condition by the following formula (18):

Lambda＝n/nO ₂ (18)

wherein Lambda is the air-fuel ratio, nO ₂ To this theoretical oxygen amount, nO ₂ ＝x+y/4-z/2。

The

above steps

304 and 304 are represented in code form as follows:

H ₂ O _cooler ＝0

x＝1

y＝1.817

z＝0

x’＝1

y’＝1.817

z’＝0

H _abs ＝4.85

O _{2_amb} ＝0.2099

N _{2_amb} ＝0.7901

CO _{2_amb} ＝0

GMWair＝28.97

inputting actual discharge below # level

CO ₂ Units of = # is%

CO = # unit ppm

HC = # unit ppm

NO _x Unit of = # ppm

O ₂ Units of = # The

A＝N _{2_amb} /O _{2_amb}

B＝CO _{2_amb} /O _{2_amb}

C＝0.00160757*H _abs /O _{2_amb}

n＝1

n_old＝0

d＝1

Count＝0

While n–n_old>0.000001:

n_old＝n

n _tot ＝(x+B*n)/(CO ₂ /100+CO/1000000+HC/1000000)*(1–H ₂ O _cooler )

a＝CO ₂ /100*n _tot /(1–H ₂ O _cooler )

b＝CO/1000000*n _tot /(1–H ₂ O _cooler )

h＝HC/1000000*n _tot /(1–H ₂ O _cooler )/x’

g＝NO _X /1000000*n _tot /(1–H ₂ O _cooler )

c＝(y–y’*h)/2+n*C–d

e＝O ₂ /100*n _tot /(1–H ₂ O _cooler )

d＝(y–y’*h+2*n*C)/(2*(b/(a*K)+1))

f＝n*A–g/2

n＝(2*a+b+d+2*e+g+z’*h-z)/(2+C+2*B)

nO ₂ ＝x+y/4–z/2

Lambda＝n/nO ₂

Print(Lambda)。

306. The electronic device calibrates a pump current of an oxygen sensor of the vehicle under the target operating condition based on an air-fuel ratio of the vehicle when operating under the target operating condition.

For example, selecting target conditions such as 1500r/min,45% load, adjusting target air-fuel ratio from 0.7, 0.75, 0.8, 0.85, 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 0.995, 0.998, 1.0, 1.002, 1.005, 1.01, 1.02, 1.03, 1.04, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, etc., each stable for 1 minute, and waiting for CO to be stable ₂ 、CO、HC、NO _x 、O ₂ After the stabilization, the pump current at that time, the individual gaseous emissions, and the air-fuel ratio of the matched oxygen sensor and the system oxygen sensor are recorded. And filling the reciprocal of the air-fuel ratio into the value of the characteristic line of the oxygen sensor corresponding to the pump current according to the air-fuel ratio calculated by the program under the working condition.

The air/fuel ratio calculated as described above is designated as LAMB, and UEGO _ rLamS1B1, the actual air/fuel ratio measured by the system oxygen sensor, actually operated at the vehicle hub and recorded, is shown in table 1 below:

TABLE 1

It can be seen that the LAMB calculated using gaseous emissions and the above logic is closer to the target air-fuel ratio than the matching oxygen sensor ES630_ LA1_ Lambda. And (3) taking the air-fuel ratio LAMB calculated logically as a standard, and adjusting the corresponding pump current in the characteristic line of the oxygen sensor through the reciprocal of the LAMB to obtain the optimized pump current of the oxygen sensor.

According to the technical scheme provided by the embodiment of the application, the air-fuel ratio is determined by determining the theoretical oxygen amount and the actual combustion amount required by burning the target fuel, the determination of the air-fuel ratio is more accurate and convenient, and the subsequent calibration of the characteristic line of the oxygen sensor is more convenient; the efficiency is improved by 50% by combining with automatic calibration, and the labor consumption is saved by 70%.

Corresponding to the above method embodiment, referring to fig. 4, the present embodiment also provides an air-fuel ratio determining apparatus 400, including: a concentration acquisition module 401, a number acquisition module 402, a theoretical oxygen amount acquisition module 403, an actual oxygen amount acquisition module 404, and an air-fuel ratio determination module 405.

The concentration obtaining module 401 is used for obtaining the consumed fuel amount and the concentration of the generated exhaust gas when the vehicle runs under the target working condition.

The number obtaining module 402 is configured to obtain the numbers of carbon atoms, hydrogen atoms, and oxygen atoms in a chemical formula of a target fuel, where the target fuel is a fuel consumed by the vehicle during operation.

And a theoretical oxygen amount obtaining module 403, configured to determine, based on the numbers of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel oil and the fuel oil amount, a theoretical oxygen amount consumed when the vehicle operates under the target working condition.

And an actual oxygen amount obtaining module 404, configured to determine an actual oxygen amount consumed by the vehicle when the vehicle operates under the target operating condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel, and the environmental parameter.

An air-fuel ratio determination module 405 to determine an air-fuel ratio of the vehicle operating at the target operating condition based on the actual oxygen amount and the theoretical oxygen amount.

In a possible implementation, the actual oxygen amount obtaining module 404 is configured to obtain an air physical coefficient and an air composition coefficient based on the environment parameter, the air physical coefficient is used to indicate a ratio of the amounts of the substances of the specific humidity and the oxygen in the environment, and the air composition coefficient is used to indicate a ratio of the amounts of the substances of the nitrogen, the oxygen and the carbon dioxide in the environment. And determining the actual oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the air physical coefficient, the air component coefficient, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the concentration of the exhaust gas.

In a possible implementation manner, the actual oxygen amount obtaining module 404 is configured to, in a case that a difference between the actual oxygen amount determined in the last iteration process and the target oxygen amount is greater than or equal to a difference threshold, perform the following steps:

and acquiring a molar balance parameter based on the number of carbon atoms in the molecular formula of the target fuel oil, the air component coefficient, the concentration of the exhaust gas and the actual oxygen amount determined in the last iteration process.

Determining a trim factor for carbon dioxide in the exhaust gas based on the concentration of carbon dioxide in the exhaust gas and the molar balance parameter.

Determining a trim factor for carbon monoxide in the exhaust gas based on the concentration of carbon monoxide in the exhaust gas and the molar balance parameter.

Determining a trim factor for hydrocarbons in the exhaust gas based on the concentration of hydrocarbons in the exhaust gas, the concentration of the target fuel in the exhaust gas, and the molar balance parameter.

Determining a trim factor for the nitrogen oxide in the exhaust gas based on the concentration of the nitrogen oxide in the exhaust gas and the molar balance parameter.

And determining the balancing coefficient of the water in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient, the balancing coefficient of the carbon dioxide, the balancing coefficient of the carbon monoxide and an equilibrium constant.

And determining the balancing coefficient of the hydrogen in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient and the balancing coefficient of the water.

Determining a trim factor for oxygen in the exhaust gas based on the concentration of oxygen in the exhaust gas and the molar balance parameter.

And determining the balancing coefficient of the nitrogen in the exhaust gas based on the actual oxygen amount determined in the last iteration process, the air composition coefficient and the balancing coefficient of the oxynitride.

And determining the actual oxygen consumption amount of the vehicle when the vehicle operates under the target working condition based on the carbon dioxide balancing coefficient, the carbon monoxide balancing coefficient, the hydrocarbon balancing coefficient, the nitrogen oxide balancing coefficient, the water balancing coefficient, the hydrogen balancing coefficient, the oxygen balancing coefficient, the nitrogen balancing coefficient, the number of oxygen atoms in the chemical formula of the target fuel, the air physical coefficient and the air component coefficient.

In a possible embodiment, the theoretical oxygen amount obtaining module 403 is configured to determine the unit oxygen amount required for completely combusting the unit substance amount of the target fuel based on the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel. And determining the theoretical oxygen consumption of the vehicle when the vehicle operates under the target working condition based on the unit oxygen amount and the fuel oil amount.

In one possible embodiment, the air-fuel ratio determining module 405 is configured to determine the ratio of the actual oxygen amount and the theoretical oxygen amount as the air-fuel ratio of the vehicle operating under the target operating condition.

In one possible implementation, the number obtaining module 402 is configured to obtain an oil report of the target fuel. And acquiring the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel from the oil product report.

In one possible embodiment, the apparatus further comprises:

In one possible embodiment, the exhaust gas includes at least one of hydrocarbons, oxygen, nitrogen oxides, water, and the target fuel that is not completely combusted.

Referring to fig. 5, an embodiment of the present application further provides an electronic device 500, where the electronic device includes:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of determining air/fuel ratio in the method embodiments described above.

Embodiments of the present application also provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the air-fuel ratio determination method in the foregoing method embodiments.

The present embodiments also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the air-fuel ratio determination method in the aforementioned method embodiments.

Referring now to FIG. 5, shown is a schematic diagram of an electronic device 500 suitable for use in implementing embodiments of the present application. The electronic device 500 in the embodiment of the present application may include, but is not limited to, mobile electronic devices such as a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), and the like, and stationary electronic devices such as a digital TV, a desktop computer, and the like. The electronic device 500 shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.

As shown in fig. 5, electronic device 500 may include a processing means (e.g., central processing unit, graphics processor, etc.) 501 that may perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM) 502 or a program loaded from a storage means 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the electronic apparatus 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.

Generally, the following devices may be connected to the I/O interface 505: input devices 506 including, for example, a touch screen, touch pad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 507 including, for example, a Liquid Crystal Display (LCD), speakers, vibrators, and the like; storage devices 508 including, for example, magnetic tape, hard disk, etc.; and a communication device 509. The communication means 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. While the figures illustrate an electronic device 500 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided.

In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means 509, or installed from the storage means 508, or installed from the ROM 502. The computer program performs the above-described functions defined in the methods of the embodiments of the present application when executed by the processing device 501.

It should be noted that the computer readable medium of the present disclosure may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.

The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.

The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: acquiring at least two internet protocol addresses; sending a node evaluation request comprising the at least two internet protocol addresses to node evaluation equipment, wherein the node evaluation equipment selects the internet protocol addresses from the at least two internet protocol addresses and returns the internet protocol addresses; receiving an internet protocol address returned by the node evaluation equipment; wherein the obtained internet protocol address indicates an edge node in the content distribution network.

Alternatively, the computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: receiving a node evaluation request comprising at least two internet protocol addresses; selecting an internet protocol address from the at least two internet protocol addresses; returning the selected internet protocol address; wherein the received internet protocol address indicates an edge node in the content distribution network.

Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, and conventional procedural programming languages, such as the-C "programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units described in the embodiments of the present application may be implemented by software or hardware. Where the name of a unit does not in some cases constitute a limitation of the unit itself, the first retrieving unit may also be described as-a unit for retrieving at least two internet protocol addresses ", for example.

Claims

1. An air-fuel ratio determination method characterized by comprising:

acquiring the consumed fuel quantity and the generated concentration of exhaust gas when the vehicle runs under a target working condition;

determining the theoretical oxygen amount consumed by the vehicle when the vehicle runs under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel and the fuel amount;

determining the actual oxygen amount consumed by the vehicle when the vehicle operates under the target working condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the environmental parameters;

2. The air-fuel ratio determination method according to claim 1, wherein the determining an actual amount of oxygen consumed by the vehicle while operating in the target operating condition based on the concentration of the exhaust gas, the number of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel, and an environmental parameter comprises:

3. The air-fuel ratio determination method according to claim 2, wherein the determining the actual amount of oxygen consumed by the vehicle while operating under the target operating condition, based on the air physical coefficient, the air composition coefficient, the number of carbon atoms, hydrogen atoms, oxygen atoms in the chemical formula of the target fuel, and the concentration of the exhaust gas, comprises:

determining a balancing coefficient of hydrogen in the exhaust gas based on the number of hydrogen atoms in the chemical formula of the target fuel, the balancing coefficient of the hydrocarbon, the actual oxygen amount determined in the last iteration process, the air physical coefficient and the balancing coefficient of water;

4. The air-fuel ratio determination method according to claim 1, wherein the determining a theoretical amount of oxygen consumed by the vehicle when operating under the target operating condition based on the number of carbon atoms, hydrogen atoms, oxygen atoms in the chemical formula of the target fuel and the amount of fuel comprises:

determining the unit oxygen amount required by the target fuel oil based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil;

5. The air-fuel ratio determination method according to claim 1, wherein the obtaining of the numbers of carbon atoms, hydrogen atoms, and oxygen atoms in the chemical formula of the target fuel includes:

acquiring an oil product report of the target fuel oil;

6. The method of determining an air-fuel ratio of claim 1, wherein after determining the air-fuel ratio of the vehicle operating at the target operating condition based on the actual oxygen amount and the theoretical oxygen amount, the method further comprises:

7. The air-fuel ratio determination method according to any one of claims 1 to 6, characterized in that the exhaust gas includes at least one of hydrocarbons, oxygen, nitrogen oxides, water, and the target fuel that is not completely combusted.

8. An air-fuel ratio determination device comprising:

the theoretical oxygen quantity acquisition module is used for determining the theoretical oxygen quantity consumed by the vehicle when the vehicle runs under the target working condition based on the number of carbon atoms, hydrogen atoms and oxygen atoms in the chemical formula of the target fuel oil and the fuel oil quantity;

and the air-fuel ratio determining module is used for determining the ratio of the actual oxygen amount to the theoretical oxygen amount as the air-fuel ratio of the vehicle when the vehicle runs under the target working condition.

9. An electronic device, characterized in that the electronic device comprises:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the air-fuel ratio determination method of any of the preceding claims 1-7.

10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the air-fuel ratio determination method of any one of the preceding claims 1-7.