CN117345445A - Control method and device of automobile engine management system and electronic equipment - Google Patents

Control method and device of automobile engine management system and electronic equipment Download PDF

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Publication number
CN117345445A
CN117345445A CN202311473444.2A CN202311473444A CN117345445A CN 117345445 A CN117345445 A CN 117345445A CN 202311473444 A CN202311473444 A CN 202311473444A CN 117345445 A CN117345445 A CN 117345445A
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CN
China
Prior art keywords
cylinder
control unit
difference
main control
gasoline vapor
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Pending
Application number
CN202311473444.2A
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Chinese (zh)
Inventor
陈昊
高天宇
孙鹏远
张慧峰
曾玲鑫
陈伟轩
王奎霖
刘沛霖
王廷伟
苗志慧
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FAW Group Corp
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FAW Group Corp
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Priority to CN202311473444.2A priority Critical patent/CN117345445A/en
Publication of CN117345445A publication Critical patent/CN117345445A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
    • F02D41/004—Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position
    • 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
    • F02D41/0002—Controlling intake air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The invention discloses a control method and device of an automobile engine management system and electronic equipment. The automobile engine management system comprises a main control unit, an auxiliary control unit, a carbon tank electromagnetic valve, a first cylinder and a second cylinder, and the control method comprises the following steps: the main control unit determines an absolute value of a difference between an air-fuel ratio of the first cylinder and a desired air-fuel ratio as a first difference; the main control unit determines an absolute value of a difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio as a second difference; the main control unit controls the duty ratio of the electromagnetic valve of the carbon tank according to the magnitude relation between the first difference value and the second difference value, so that the demand of the cylinder corresponding to the difference value with large value for fresh air containing gasoline vapor is preferentially met. The technology provided by the embodiment of the invention solves the problem that the duty ratio of the electromagnetic valve of the carbon tank controlled by one control unit cannot meet the requirement of two cylinders on fresh air containing gasoline steam.

Description

Control method and device of automobile engine management system and electronic equipment
Technical Field
The present invention relates to the field of automotive technologies, and in particular, to a control method and apparatus for an automotive engine management system, and an electronic device.
Background
In order to prevent gasoline in an oil tank from volatilizing into the atmosphere and meet the requirement of regulation on emission of evaporant, an evaporant emission control system is designed in an engine management system, fuel vapor volatilized from the oil tank is adsorbed in an activated carbon tank, when an engine runs, fresh air passes through the carbon tank by utilizing the negative pressure state of an air inlet system, the adsorbed fuel vapor in the activated carbon is desorbed out by the carbon tank and re-enters the engine for combustion, and the aim of reducing the emission of evaporant is achieved, and fig. 1 is a schematic structural diagram of a single cylinder and the carbon tank of a traditional engine system in the prior art. The conventional engine system in the prior art comprises an oil tank 01, a carbon tank 02, a carbon tank electromagnetic valve 03 and a cylinder 04.
In order to improve the combustion efficiency of fuel vapor volatilized from an oil tank, the prior art provides a carbon tank, a carbon tank electromagnetic valve, a main control unit, an auxiliary control unit, a first cylinder and a second cylinder, wherein the main control unit controls the first cylinder, the auxiliary control unit controls the second cylinder, and fresh air containing gasoline vapor from the carbon tank respectively enters an air inlet manifold of the first cylinder and an air inlet manifold of the second cylinder through two pipelines after passing through the carbon tank electromagnetic valve. The duty ratio of the canister solenoid valve can only be controlled by one control unit, but the difference of air intake, fuel injection, combustion and the like of two cylinders of the engine makes the fresh air amount containing gasoline vapor required by each cylinder different, and the required amount needs to be satisfied by controlling the duty ratio of the canister solenoid valve, which makes it difficult to control the duty ratio of the canister solenoid valve by one control unit, because it is almost impossible to simultaneously satisfy the fresh air amount containing gasoline vapor required by two cylinders with the same duty ratio value of the canister solenoid valve.
The existing method is to determine that the air quantity of the fresh air containing the gasoline vapor entering the two cylinders after passing through the electromagnetic valve is the same, and meanwhile, the air quantity required by the first cylinder controlled by the main control unit is mainly used, the air quantity required is transmitted to the auxiliary control unit by using the private CAN, and the oil content in the fresh air containing the gasoline vapor entering the cylinder controlled by the auxiliary control unit is calculated and fed back to the air-fuel ratio closed-loop control of the auxiliary control unit.
The problem with this approach is that ignoring the difference in demand for both cylinders may cause errors to accumulate, while disregarding the condition of the second cylinder controlled by the secondary control unit may affect the combustion of the second cylinder, presenting greater challenges for air-fuel ratio closed loop and canister control closed loop.
Disclosure of Invention
The invention provides a control method, a control device and electronic equipment of an automobile engine management system, which are used for solving the problem that the duty ratio of a carbon tank electromagnetic valve controlled by one control unit cannot meet the requirement of two cylinders on fresh air containing gasoline vapor.
According to an aspect of the present invention, there is provided a control method of an automobile engine management system including a main control unit, a sub-control unit, a canister solenoid valve, a first cylinder, and a second cylinder, including:
The main control unit determines an absolute value of a difference between an air-fuel ratio of the first cylinder and a desired air-fuel ratio as a first difference;
the main control unit determines an absolute value of a difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio as a second difference;
the main control unit controls the duty ratio of the electromagnetic valve of the carbon tank according to the magnitude relation between the first difference value and the second difference value, so that the demand of the cylinder corresponding to the difference value with large value for fresh air containing gasoline vapor is preferentially met.
Optionally, the main control unit preferably satisfies the demand of the cylinder corresponding to the difference with a large value for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank according to the magnitude relation between the first difference and the second difference, and the method comprises the following steps:
the first difference value is larger than the second difference value, and the main control unit preferentially meets the requirement of the first air cylinder on fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank;
the first difference value is smaller than the second difference value, and the main control unit preferentially meets the demand of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
Optionally, the first difference is greater than the second difference, and the main control unit preferably satisfies the requirement of the first cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the solenoid valve of the carbon tank, including:
The first difference value is larger than the second difference value, the main control unit preferably meets the demand of the first cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and can also determine the demand of the second cylinder for the fresh air containing the gasoline vapor according to the demand of the first cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
wherein the demand of the second cylinder for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesS＝(1/K)*FlowPurgDesM
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, the first difference is smaller than the second difference, the main control unit preferably satisfies the requirement of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, and the method includes:
the first difference value is smaller than the second difference value, the main control unit preferably meets the demand of the second cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and the demand of the first cylinder for the fresh air containing the gasoline vapor can be determined according to the demand of the second cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
Wherein the first cylinder demand for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesM＝K*FlowPurgDesS；
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, the first difference is greater than the second difference, and before the main control unit preferably satisfies the requirement of the first cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, the main control unit further includes:
the main control unit determines the amount of fresh air containing gasoline vapor required by the first cylinder based on the air-fuel ratio of the first cylinder.
Optionally, the first difference is smaller than the second difference, and before the main control unit controls the duty ratio of the electromagnetic valve of the carbon tank to preferentially meet the requirement of the second cylinder for the fresh air containing gasoline vapor, the main control unit further includes:
the main control unit determines the amount of fresh air containing gasoline vapor required by the second cylinder based on the air-fuel ratio of the second cylinder.
Optionally, according to the magnitude relation between the first difference and the second difference, the main control unit preferably satisfies the requirement of the cylinder corresponding to the difference with a large value for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and before that, the main control unit further comprises:
Determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the second cylinder is zero, wherein the air inflow of the first cylinder;
determining that the electromagnetic valve of the carbon tank is fully opened, and determining that the air inflow of the first cylinder is zero and the air inflow of the second cylinder;
determining the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder when the carbon tank electromagnetic valve is opened;
when the carbon tank electromagnetic valve is opened, the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder meets the following relationship:
K＝FlowOpenM/FlowOpenS；
the air inflow of the second cylinder is zero, the air inflow of the first cylinder is fully opened, and the air inflow of the first cylinder is zero.
According to another aspect of the present invention, there is provided a control device of an automobile engine management system including a main control unit, a sub-control unit, a canister solenoid valve, a first cylinder, and a second cylinder, the main control unit including: the device comprises a first difference value determining module, a second difference value determining module and a carbon tank electromagnetic valve control module;
the first difference value determining module of the main control unit is used for determining the absolute value of the difference value between the air-fuel ratio of the first cylinder and the expected air-fuel ratio as a first difference value;
The second difference determining module of the main control unit is used for determining the absolute value of the difference value between the air-fuel ratio of the second cylinder and the expected air-fuel ratio as a second difference value;
the carbon tank electromagnetic valve control module of the main control unit is used for preferentially meeting the demand of the cylinder corresponding to the difference with large value for fresh air containing gasoline steam by controlling the duty ratio of the carbon tank electromagnetic valve according to the magnitude relation of the first difference and the second difference.
According to still another aspect of the present invention, there is provided an electronic apparatus of an automobile engine management system, the electronic apparatus of the automobile engine management system including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the control method of the automotive engine management system according to any one of the embodiments of the present invention.
According to still another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to execute a control method of an automotive engine management system according to any one of the embodiments of the present invention.
According to the technical scheme provided by the embodiment of the invention, the air-fuel ratio is used as a reference quantity, the main control unit controls the duty ratio of the carbon tank electromagnetic valve, but the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder are considered at the same time, namely, the combustion states of the two cylinders are considered at the same time, the difference value between the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder and the expected air-fuel ratio is calculated respectively, and the absolute values of the two difference values are compared, so that the air demand of the cylinder controlled by the control unit with the large absolute value of the difference value is preferentially met, the combustion condition of the first cylinder and the second cylinder can be considered at the same time, the duty ratio of the carbon tank electromagnetic valve is timely controlled, and the excessive combustion impact and even shaking of the second cylinder controlled by the auxiliary control unit is avoided, so that the duty ratio of the carbon tank electromagnetic valve controlled by one control unit cannot meet the demand of the fresh air containing gasoline vapor by the two cylinders.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional engine system of the prior art;
fig. 2 is a flowchart of a control method of an automobile engine management system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the functional principle of a carbon canister provided in accordance with a first embodiment of the present invention;
fig. 4 is a flowchart of a control method of an automobile engine management system according to a second embodiment of the present invention;
fig. 5 is a flowchart of a control method of an automobile engine management system according to a third embodiment of the present invention;
FIG. 6 is a schematic diagram of calculation of the air volume of an air cylinder according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of a control strategy for a dual control unit canister according to a third embodiment of the invention;
fig. 8 is a flowchart of a control method of an automobile engine management system according to a fourth embodiment of the present invention;
fig. 9 is a schematic structural diagram of a control device of an engine management system of an automobile according to a fifth embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electronic device according to a control method of an engine management system of an automobile according to a sixth embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 2 is a flowchart of a control method of an automobile engine management system according to a first embodiment of the present invention, where the automobile engine management system includes a main control unit, a secondary control unit, a carbon tank electromagnetic valve, a first cylinder and a second cylinder, where the main control unit controls operation of the first cylinder, the secondary control unit controls operation of the second cylinder, the method may be executed by a control device of the automobile engine management system, the control device of the automobile engine management system may be implemented in a form of hardware and/or software, and the control device of the automobile engine management system may be configured in an automobile. As shown in fig. 2, the method includes:
S110, the main control unit determines an absolute value of a difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio as a first difference.
In an embodiment of the present invention, the main control unit may be an Electronic Control Unit (ECU), and the sub-control unit may be an Electronic Control Unit (ECU).
The main control unit is used for controlling the first cylinder, the auxiliary control unit is used for controlling the second cylinder, and the main control unit is in communication connection with the auxiliary control unit.
S120, the main control unit determines that the absolute value of the difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio is the second difference.
The main control unit is in communication connection with the auxiliary control unit, and the auxiliary control unit is used for controlling the second cylinder, and the main control unit obtains the air-fuel ratio of the second cylinder through the auxiliary control unit and determines the absolute value of the difference value between the air-fuel ratio of the second cylinder and the expected air-fuel ratio.
S130, the main control unit controls the duty ratio of the electromagnetic valve of the carbon tank according to the magnitude relation between the first difference value and the second difference value, so that the demand of the cylinder corresponding to the difference value with large value for fresh air containing gasoline vapor is preferentially met.
As shown in fig. 3, fig. 3 is a schematic diagram of a carbon tank function principle provided in the first embodiment of the present invention, the control of the carbon tank is mainly completed through the air-fuel ratio of the engine, when the carbon tank is opened, the oil content in the fresh air containing gasoline vapor entering the engine will affect the engine combustion, and cause the air-fuel ratio change, at this time, the air-fuel ratio closed loop will be adjusted and output a control value, the carbon tank control strategy calculates the load of the carbon tank (how much of the oil content in the carbon tank) through the air-fuel ratio closed loop control output value, then calculates the expected flushing rate by the carbon tank load and the air-fuel ratio closed loop control output value and combines the previous flushing rate feedback value, and finally calculates the duty ratio of the carbon tank electromagnetic valve to control the carbon tank electromagnetic valve.
According to the technical scheme provided by the embodiment of the invention, the air-fuel ratio is used as a reference quantity, the main control unit controls the duty ratio of the carbon tank electromagnetic valve, but the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder are considered at the same time, namely, the combustion states of the two cylinders are considered at the same time, the difference value between the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder and the expected air-fuel ratio is calculated respectively, and the absolute values of the two difference values are compared, so that the air demand of the cylinder controlled by the control unit with the large absolute value of the difference value is preferentially met, the combustion condition of the first cylinder and the second cylinder can be considered at the same time, the duty ratio of the carbon tank electromagnetic valve is timely controlled, and the excessive combustion impact and even shaking of the second cylinder controlled by the auxiliary control unit is avoided, so that the duty ratio of the carbon tank electromagnetic valve controlled by one control unit cannot meet the demand of the fresh air containing gasoline vapor by the two cylinders.
Example two
Fig. 4 is a flowchart of a control method of an automobile engine management system according to a second embodiment of the present invention. The difference between this embodiment and the above embodiment is that S130 in the above embodiment is thinned. As shown in fig. 4, the method includes:
S210, the main control unit determines an absolute value of a difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio as a first difference.
The steps and advantages of the execution of S210 can be seen in S110, and are not described herein.
S220, the main control unit determines that the absolute value of the difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio is the second difference.
The steps and advantages of the execution of S220 can be seen in S120, and are not described herein.
S230, the first difference value is larger than the second difference value, and the main control unit preferably meets the requirement of the first air cylinder on fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
According to the technical scheme provided by the embodiment of the invention, the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder are considered, the difference value between the air-fuel ratio of the first cylinder and the expected air-fuel ratio of the second cylinder is calculated respectively, the absolute value of the two difference values is compared, the first difference value is larger than the second difference value, and the main control unit preferentially meets the requirement of the first cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, so that the combustion condition of the second cylinder can be considered at the same time, the duty ratio of the carbon tank electromagnetic valve is controlled in time, the second cylinder controlled by the auxiliary control unit is prevented from generating excessive combustion impact and even shaking, and the problem that the requirement of the two cylinders for fresh air containing gasoline vapor cannot be met by controlling the duty ratio of the carbon tank electromagnetic valve by one control unit is solved.
Optionally, the first difference is greater than the second difference, and before the main control unit preferably satisfies the requirement of the first cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, the main control unit further includes:
the main control unit determines the amount of fresh air containing gasoline vapor required by the first cylinder based on the air-fuel ratio of the first cylinder.
S240, the first difference value is smaller than the second difference value, and the main control unit preferentially meets the requirement of the second air cylinder on fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
Optionally, the first difference is smaller than the second difference, and before the main control unit controls the duty ratio of the electromagnetic valve of the carbon tank to preferentially meet the requirement of the second cylinder for the fresh air containing gasoline vapor, the main control unit further includes:
the main control unit determines the amount of fresh air containing gasoline vapor required by the second cylinder based on the air-fuel ratio of the second cylinder.
Specifically, the main control unit obtains the air-fuel ratio of the second cylinder through the auxiliary control unit, and further determines the demand of the second cylinder for fresh air containing gasoline vapor.
According to the technical scheme provided by the embodiment of the invention, the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder are considered, the difference value between the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder and the expected air-fuel ratio is calculated respectively, the absolute value of the two difference values is compared, the first difference value is larger than the second difference value, and the main control unit preferentially meets the requirement of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, so that the combustion condition of the first cylinder can be considered at the same time, the duty ratio of the carbon tank electromagnetic valve is controlled in time, the second cylinder controlled by the auxiliary control unit is prevented from generating excessive combustion impact and even shaking, and the problem that the requirement of the two cylinders for fresh air containing gasoline vapor cannot be met by controlling the duty ratio of the carbon tank electromagnetic valve by one control unit is solved.
Example III
Fig. 5 is a flowchart of a control method of an automobile engine management system according to a third embodiment of the present invention. The difference between this embodiment and the above embodiment is that S230 in the above embodiment is thinned. As shown in fig. 5, the method includes:
s310, the main control unit determines that the absolute value of the difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio is the first difference.
The steps and advantages of the execution of S310 can be seen in S210, and are not described herein.
S320, the main control unit determines the absolute value of the difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio as the second difference.
The steps and advantages of S320 can be seen in S220, and are not described herein.
S330, the first difference value is larger than the second difference value, the main control unit preferably meets the requirement of the first cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and the requirement of the second cylinder for the fresh air containing the gasoline vapor can be determined according to the requirement of the first cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
wherein the demand of the second cylinder for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesS＝(1/K)*FlowPurgDesM
Wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, S330 further includes:
and determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the second cylinder is zero, wherein the air inflow of the first cylinder is equal to the air inflow of the second cylinder.
And determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the first cylinder is zero, and the air inflow of the second cylinder.
When the canister solenoid valve is opened, the ratio of the intake air amount of the first cylinder to the intake air amount of the second cylinder is determined.
When the carbon tank electromagnetic valve is opened, the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder meets the following relationship:
K＝FlowOpenM/FlowOpenS；
the air inflow of the second cylinder is zero, the air inflow of the first cylinder is fully opened, and the air inflow of the first cylinder is zero.
As shown in fig. 6, fig. 6 is a schematic diagram of calculation of the air volume of a cylinder according to the third embodiment of the present invention, where the air volume of fresh air containing gasoline vapor entering the first cylinder and the second cylinder after passing through the canister solenoid valve can be calculated by taking the air volume value (obtained by a calculation formula) entering a single cylinder when the canister solenoid valve is fully opened as a proportion, and simulating the air volume value when the canister solenoid valve is fully opened with only one cylinder, where the air volume is only related to the working state of the cylinder itself, including manifold pressure, boost pressure, intake air amount, ambient temperature, and other factors. This amount is named FlowOpen, which indicates the ability of each cylinder to introduce fresh air containing gasoline vapor, the canister solenoid valve is fully open, the intake air amount of the second cylinder is zero, the intake air amount of the first cylinder is named FlowOpenM, the canister solenoid valve is fully open, the intake air amount of the first cylinder is zero, and the intake air amount of the second cylinder is named FlowOpenS. The amount of fresh air containing gasoline vapor required for each cylinder is designated FlowPurgDes, the amount of fresh air containing gasoline vapor required for the first cylinder is designated FlowPurgDesM, and the amount of fresh air containing gasoline vapor required for the second cylinder is designated FlowPurgDesS.
S340, the first difference value is smaller than the second difference value, and the main control unit preferentially meets the requirement of the second air cylinder on fresh air containing gasoline steam by controlling the duty ratio of the electromagnetic valve of the carbon tank.
The steps and advantages of S340 are shown in S240, and will not be described herein.
As shown in fig. 7, fig. 7 is a schematic diagram of a control strategy of a carbon tank with a dual control unit according to the third embodiment of the present invention, and the technical scheme provided by the third embodiment of the present invention considers the air-fuel ratios of the first cylinder and the second cylinder, calculates the difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio of the second cylinder, and compares the absolute values of the two differences, where the first difference is greater than the second difference, and the main control unit controls the duty ratio of the solenoid valve of the carbon tank to preferentially satisfy the demand of the first cylinder for fresh air containing gasoline vapor, and determines the demand of the second cylinder for fresh air containing gasoline vapor according to the demand of the first cylinder for fresh air containing gasoline vapor and the ratio of the intake air of the first cylinder to the intake air of the second cylinder, so as to simultaneously consider the combustion condition of the second cylinder, and timely control the duty ratio of the solenoid valve of the carbon tank, thereby avoiding excessive combustion impact and even shaking caused by the second cylinder controlled by the auxiliary control unit, and solving the problem that the duty ratio of the solenoid valve of the carbon tank cannot satisfy the demand of fresh air containing gasoline vapor for the first cylinder.
Example IV
Fig. 8 is a flowchart of a control method of an automobile engine management system according to a fourth embodiment of the present invention. The difference between this embodiment and the above embodiment is that S240 in the above embodiment is thinned. As shown in fig. 8, the method includes:
s410, the main control unit determines that the absolute value of the difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio is the first difference.
S420, the main control unit determines that the absolute value of the difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio is the second difference.
S430, the first difference value is larger than the second difference value, and the main control unit preferably meets the requirement of the first air cylinder on fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
S440, the first difference value is smaller than the second difference value, the main control unit preferably meets the requirement of the second cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and the requirement of the first cylinder for the fresh air containing the gasoline vapor can be determined according to the requirement of the second cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
wherein the first cylinder demand for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesM＝K*FlowPurgDesS；
Wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, S440 further includes:
and determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the second cylinder is zero, wherein the air inflow of the first cylinder is equal to the air inflow of the second cylinder.
And determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the first cylinder is zero, and the air inflow of the second cylinder.
When the canister solenoid valve is opened, the ratio of the intake air amount of the first cylinder to the intake air amount of the second cylinder is determined.
When the carbon tank electromagnetic valve is opened, the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder meets the following relationship:
K＝FlowOpenM/FlowOpenS；
the air inflow of the second cylinder is zero, the air inflow of the first cylinder is fully opened, and the air inflow of the first cylinder is zero.
As shown in fig. 6, the air flow rate of the fresh air containing gasoline vapor entering the first cylinder and the second cylinder after passing through the canister solenoid valve can be calculated by taking the air flow rate value (obtained by a calculation formula) entering the single cylinder when the canister solenoid valve is fully opened as a proportion, and the air flow rate value when the canister solenoid valve is fully opened under the condition of only one cylinder is simulated, wherein the air flow rate is only related to the working state of the cylinder, including factors such as manifold pressure, boost pressure, air inflow, ambient temperature and the like. This amount is named FlowOpen, which indicates the ability of each cylinder to introduce fresh air containing gasoline vapor, the canister solenoid valve is fully open, the intake air amount of the second cylinder is zero, the intake air amount of the first cylinder is named FlowOpenM, the canister solenoid valve is fully open, the intake air amount of the first cylinder is zero, and the intake air amount of the second cylinder is named FlowOpenS. The amount of fresh air containing gasoline vapor required for each cylinder is designated FlowPurgDes, the amount of fresh air containing gasoline vapor required for the first cylinder is designated FlowPurgDesM, and the amount of fresh air containing gasoline vapor required for the second cylinder is designated FlowPurgDesS.
As shown in fig. 7, in the technical solution provided in the embodiment of the present invention, the air-fuel ratio of the first cylinder and the second cylinder is considered, the difference between the air-fuel ratio of the first cylinder and the desired air-fuel ratio of the second cylinder is calculated, and the absolute values of the two differences are compared, where the first difference is smaller than the second difference, and the main control unit preferably satisfies the requirement of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, and may determine the requirement of the first cylinder for fresh air containing gasoline vapor according to the requirement of the second cylinder for fresh air containing gasoline vapor and the ratio of the intake air of the first cylinder to the intake air of the second cylinder, so as to simultaneously consider the combustion situation of the second cylinder, timely control the duty ratio of the carbon tank electromagnetic valve, and avoid the second cylinder controlled by the auxiliary control unit from generating excessive combustion impact or even shaking, so as to solve the problem that the requirement of the two cylinders for fresh air containing gasoline vapor cannot be satisfied by controlling the duty ratio of the carbon tank electromagnetic valve by one control unit.
In this embodiment, the activation and end conditions of the carbon canister control functions in the main control unit and the auxiliary control unit are guaranteed to be the same, and some control conditions (such as diagnosis of the carbon canister electromagnetic valve) judged by the main control unit are transmitted to the auxiliary control unit through private CAN communication, so that the functions of the main control unit and the auxiliary control unit operate simultaneously. The state quantity (such as air-fuel ratio value, fresh air demand containing gasoline vapor and the like) of the second cylinder controlled by the auxiliary control unit, which is required to be acquired by the main control unit, is also transmitted to the main control unit through private CAN communication, so that the main control unit CAN acquire the state information of the second cylinder controlled by the auxiliary control unit at any time, and when the second cylinder controlled by the auxiliary control unit needs fresh air containing gasoline vapor (through air-fuel ratio judgment), the auxiliary control unit CAN also control the duty ratio value of the carbon tank electromagnetic valve through the main control unit to meet the requirement of the auxiliary control unit.
The air quantity of the fresh air containing the gasoline vapor entering the two cylinders after passing through the electromagnetic valve can be calculated by taking the air quantity value (obtained by a calculation formula) entering the single cylinder when the electromagnetic valve of the carbon tank is fully opened as a proportion, and the air quantity requirements of the two cylinders can be respectively met by different duty ratio values of the electromagnetic valve after knowing the proportion of the fresh air containing the gasoline vapor entering the two cylinders. The invention ensures that the control of the carbon tank is more accurate and stable, and is beneficial to the combustion and operation of the engine.
The control method provided by the embodiment of the invention can enable the control of the carbon tank to be more accurate and stable, and is beneficial to the combustion and operation of the engine. The method comprises the following steps: in the first aspect, the calculation of the required air amount for actually controlling the canister solenoid valve is performed by taking the air flow value (obtained by a calculation formula) into a single cylinder when the canister solenoid valve is fully opened as a ratio. In the second aspect, the activation and end conditions of the carbon canister control functions in the main control unit and the auxiliary control unit are guaranteed to be the same, so that the carbon canister control functions of the main control unit and the auxiliary control unit operate simultaneously, the judgment is carried out through the absolute value of the difference value between the air-fuel ratio closed-loop control output value and the expected air-fuel ratio in the main control unit and the auxiliary control unit, and the air demand of the main control unit or the auxiliary control unit is selected to control the carbon canister electromagnetic valve.
Example five
Fig. 9 is a schematic structural diagram of a control device of an engine management system of an automobile according to a fifth embodiment of the present invention. As shown in fig. 9, the apparatus includes:
the automobile engine management system includes main control unit, auxiliary control unit, carbon tank solenoid valve, first cylinder and second cylinder, its characterized in that, main control unit includes: the device comprises a first difference value determining module, a second difference value determining module and a carbon tank electromagnetic valve control module;
the first difference determination module 100 of the main control unit is configured to determine an absolute value of a difference between an air-fuel ratio of the first cylinder and a desired air-fuel ratio as a first difference;
the second difference determination module 200 of the main control unit is configured to determine an absolute value of a difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio as a second difference;
the carbon tank electromagnetic valve control module 300 of the main control unit is configured to control the duty ratio of the carbon tank electromagnetic valve according to the magnitude relation between the first difference value and the second difference value, so as to preferentially satisfy the demand of the cylinder corresponding to the difference value with a large value for fresh air containing gasoline vapor.
Optionally, the canister solenoid valve control module 300 includes: a first unit and a second unit;
the first difference value is larger than the second difference value, and the first unit is used for preferentially meeting the demand of the first cylinder on the fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank;
The first difference is smaller than the second difference, and the second unit is used for preferentially meeting the demand of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
Optionally, the first difference is greater than the second difference, and the first unit is configured to preferentially satisfy the amount of the first cylinder required for the fresh air containing the gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, and may determine the amount of the second cylinder required for the fresh air containing the gasoline vapor according to the amount of the first cylinder required for the fresh air containing the gasoline vapor and the ratio of the intake air amount of the first cylinder to the intake air amount of the second cylinder;
wherein the demand of the second cylinder for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesS＝(1/K)*FlowPurgDesM
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, the first difference is smaller than the second difference, and the second unit is configured to preferentially satisfy the demand of the second cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the carbon tank electromagnetic valve, and may determine the demand of the first cylinder for the fresh air containing the gasoline vapor according to the demand of the second cylinder for the fresh air containing the gasoline vapor and the ratio of the intake air amount of the first cylinder to the intake air amount of the second cylinder;
Wherein the first cylinder demand for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesM＝K*FlowPurgDesS；
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
Optionally, the first difference determining module 100 is further configured to determine a demand of the first cylinder for fresh air containing gasoline vapor according to an air-fuel ratio of the first cylinder.
Optionally, the first difference determining module 200 is further configured to determine a demand of the second cylinder for fresh air containing gasoline vapor according to an air-fuel ratio of the second cylinder.
Optionally, the canister solenoid valve control module 300 further includes a third unit, a fourth unit, and a fifth unit; the third unit is used for determining that the electromagnetic valve of the carbon tank is fully opened, the air inflow of the second cylinder is zero, and the air inflow of the first cylinder;
the fourth unit is used for determining that the electromagnetic valve of the carbon tank is fully opened, the air inflow of the first cylinder is zero, and the air inflow of the second cylinder is zero;
the fifth unit is used for determining the proportion of the air inflow of the first cylinder and the air inflow of the second cylinder when the carbon tank electromagnetic valve is opened;
When the carbon tank electromagnetic valve is opened, the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder meets the following relationship:
K＝FlowOpenM/FlowOpenS；
the air inflow of the second cylinder is zero, the air inflow of the first cylinder is fully opened, and the air inflow of the first cylinder is zero.
According to the technical scheme provided by the embodiment of the invention, the air-fuel ratio is used as a reference quantity, the main control unit controls the duty ratio of the carbon tank electromagnetic valve, but the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder are considered at the same time, namely, the combustion states of the two cylinders are considered at the same time, the difference value between the air-fuel ratio of the first cylinder and the air-fuel ratio of the second cylinder and the expected air-fuel ratio is calculated respectively, and the absolute values of the two difference values are compared, so that the air demand of the cylinder controlled by the control unit with the large absolute value of the difference value is preferentially met, the combustion condition of the first cylinder and the second cylinder can be considered at the same time, the duty ratio of the carbon tank electromagnetic valve is timely controlled, and the excessive combustion impact and even shaking of the second cylinder controlled by the auxiliary control unit is avoided, so that the duty ratio of the carbon tank electromagnetic valve controlled by one control unit cannot meet the demand of the fresh air containing gasoline vapor by the two cylinders.
Example six
Fig. 10 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 10, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the control method of the automobile engine management system.
In some embodiments, the control method of the automobile engine management system may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the control method of the automobile engine management system described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the control method of the automotive engine management system in any other suitable way (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on 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.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein. The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A control method of an automobile engine management system, the automobile engine management system including a main control unit, an auxiliary control unit, a carbon tank electromagnetic valve, a first cylinder and a second cylinder, characterized by comprising:
the main control unit determines an absolute value of a difference between an air-fuel ratio of the first cylinder and a desired air-fuel ratio as a first difference;
the main control unit determines an absolute value of a difference between the air-fuel ratio of the second cylinder and the desired air-fuel ratio as a second difference;
The main control unit controls the duty ratio of the electromagnetic valve of the carbon tank according to the magnitude relation between the first difference value and the second difference value, so that the demand of the cylinder corresponding to the difference value with large value for fresh air containing gasoline vapor is preferentially met.
2. The control method of an automobile engine management system according to claim 1, wherein the main control unit, by controlling the duty ratio of the canister solenoid valve according to the magnitude relation of the first difference and the second difference, preferentially satisfies the demand of the cylinder corresponding to the difference having the large value for fresh air containing gasoline vapor, comprises:
the first difference value is larger than the second difference value, and the main control unit preferentially meets the requirement of the first air cylinder on fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank;
the first difference value is smaller than the second difference value, and the main control unit preferentially meets the demand of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank.
3. The control method of an automobile engine management system according to claim 2, wherein the first difference is larger than the second difference, the main control unit preferentially satisfying the demand of the first cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the canister solenoid valve includes:
The first difference value is larger than the second difference value, the main control unit preferably meets the demand of the first cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and can also determine the demand of the second cylinder for the fresh air containing the gasoline vapor according to the demand of the first cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
wherein the demand of the second cylinder for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesS＝(1/K)*FlowPurgDesM
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
4. The control method of an automobile engine management system according to claim 2, wherein the first difference is smaller than the second difference, the main control unit preferentially satisfying the demand of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the canister solenoid valve includes:
the first difference value is smaller than the second difference value, the main control unit preferably meets the demand of the second cylinder for the fresh air containing the gasoline vapor by controlling the duty ratio of the electromagnetic valve of the carbon tank, and the demand of the first cylinder for the fresh air containing the gasoline vapor can be determined according to the demand of the second cylinder for the fresh air containing the gasoline vapor and the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder;
Wherein the first cylinder demand for fresh air containing gasoline vapor satisfies the following relationship:
FlowPurgDesM＝K*FlowPurgDesS；
wherein, flowPurgDesM is the demand of the first cylinder for the fresh air containing the gasoline vapor, flowPurgDesS is the demand of the second cylinder for the fresh air containing the gasoline vapor, and K is the ratio of the intake air quantity of the first cylinder to the intake air quantity of the second cylinder.
5. A control method of an automotive engine management system according to claim 2 or 3, wherein the main control unit, by controlling the duty ratio of the canister solenoid valve, preferentially satisfies the demand of the first cylinder for fresh air containing gasoline vapor further comprises, before:
the main control unit determines the amount of fresh air containing gasoline vapor required by the first cylinder based on the air-fuel ratio of the first cylinder.
6. The control method of an automobile engine management system according to claim 2 or 4, wherein the first difference is smaller than the second difference, and the main control unit preferably satisfies the demand of the second cylinder for fresh air containing gasoline vapor by controlling the duty ratio of the canister solenoid valve, before further comprising:
the main control unit determines the amount of fresh air containing gasoline vapor required by the second cylinder based on the air-fuel ratio of the second cylinder.
7. The control method of an automobile engine management system according to claim 3 or 4, wherein the main control unit, by controlling the duty ratio of the canister solenoid valve, preferentially satisfies the demand of the cylinders corresponding to the large difference for fresh air containing gasoline vapor by controlling the duty ratio of the canister solenoid valve according to the magnitude relation between the first difference and the second difference, further comprises:
determining that the electromagnetic valve of the carbon tank is fully opened, and the air inflow of the second cylinder is zero, wherein the air inflow of the first cylinder;
determining that the electromagnetic valve of the carbon tank is fully opened, and determining that the air inflow of the first cylinder is zero and the air inflow of the second cylinder;
determining the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder when the carbon tank electromagnetic valve is opened;
when the carbon tank electromagnetic valve is opened, the ratio of the air inflow of the first cylinder to the air inflow of the second cylinder meets the following relationship:
K＝FlowOpenM/FlowOpenS；
the air inflow of the second cylinder is zero, the air inflow of the first cylinder is fully opened, and the air inflow of the first cylinder is zero.
8. The utility model provides a controlling means of automobile engine management system, automobile engine management system includes main control unit, vice control unit, carbon tank solenoid valve, first cylinder and second cylinder, its characterized in that, main control unit includes: the device comprises a first difference value determining module, a second difference value determining module and a carbon tank electromagnetic valve control module;
The first difference value determining module of the main control unit is used for determining the absolute value of the difference value between the air-fuel ratio of the first cylinder and the expected air-fuel ratio as a first difference value;
the second difference determining module of the main control unit is used for determining the absolute value of the difference value between the air-fuel ratio of the second cylinder and the expected air-fuel ratio as a second difference value;
the carbon tank electromagnetic valve control module of the main control unit is used for preferentially meeting the demand of the cylinder corresponding to the difference with large value for fresh air containing gasoline steam by controlling the duty ratio of the carbon tank electromagnetic valve according to the magnitude relation of the first difference and the second difference.
9. An electronic device of an automotive engine management system, characterized in that the electronic device of the automotive engine management system comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the control method of the automobile engine management system of any one of claims 1 to 7.
10. A computer-readable storage medium storing computer instructions for causing a processor to execute a control method of the automobile engine management system according to any one of claims 1 to 7.
CN202311473444.2A 2023-11-07 2023-11-07 Control method and device of automobile engine management system and electronic equipment Pending CN117345445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311473444.2A CN117345445A (en) 2023-11-07 2023-11-07 Control method and device of automobile engine management system and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311473444.2A CN117345445A (en) 2023-11-07 2023-11-07 Control method and device of automobile engine management system and electronic equipment

Publications (1)

Publication Number Publication Date
CN117345445A true CN117345445A (en) 2024-01-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN117345445A (en)

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