阅读说明：本技术 一种充气量的控制方法及系统 (Method and system for controlling inflation quantity ) 是由 仇杰 薛小兵 虞金霞 殷俊 姚若禹 李继 徐佳 孙健 赵森 于 2019-09-25 设计创作，主要内容包括：本申请公开了一种充气量的控制方法及系统,充气量的控制方法在获取了机动车辆的测量充气参数后,在判定测量充气参数满足修正条件时,根据获取的混合气参数确定充气量修正因子,并利用该充气量修正因子修正测量充气参数,获得修正充气参数,以使机动车辆根据修正充气参数计算的充气量向发动机内的实际进气量靠近,实现了使修正充气参数更加贴近发动机的实际进气量的目的。避免了发动机根据与实际充气量有较大偏差的充气量计算得出的喷油量,与实际所需要的喷油量之间存在较大偏差,使得气缸内混合气出现过浓或过稀的情况,提升了机动车辆的运转平顺性。(After the measured inflation parameters of the motor vehicle are obtained, when the measured inflation parameters meet the correction conditions, the inflation quantity correction factor is determined according to the obtained mixed gas parameters, the measured inflation parameters are corrected by using the inflation quantity correction factor, and the corrected inflation parameters are obtained, so that the inflation quantity calculated by the motor vehicle according to the corrected inflation parameters is close to the actual air inflow in the engine, and the purpose that the corrected inflation parameters are closer to the actual air inflow of the engine is achieved. The fuel injection quantity calculated by the engine according to the air charge quantity with larger deviation from the actual air charge quantity is avoided, and the fuel injection quantity actually required has larger deviation, so that the condition that the mixed gas in the cylinder is too thick or too thin is caused, and the running smoothness of the motor vehicle is improved.)

1. A method of controlling an amount of inflation, applied to a motor vehicle, comprising:

obtaining measured inflation parameters for the motor vehicle;

acquiring parameters of a mixture in the motor vehicle engine;

judging whether the measured inflation parameters meet the correction conditions, if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to the step of obtaining the measured inflation parameters of the motor vehicle;

and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

2. The method of claim 1, wherein said obtaining measured inflation parameters of the motor vehicle comprises:

acquiring an air intake quantity change parameter measured by a hot film air flow measuring instrument of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

And acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle.

3. The method of claim 2, wherein the determining whether the measured inflation parameter satisfies a correction condition comprises:

determining that the measured charge correction parameter satisfies a correction condition when an intake air amount change parameter measured by a hot film air flow meter of the motor vehicle is greater than a first threshold, or when a throttle opening change rate of the motor vehicle is greater than a second threshold, or when an intake air amount change parameter measured by a pressure sensor of the motor vehicle is greater than a third threshold.

4. The method of claim 1, wherein said obtaining a mixture parameter within the motor vehicle engine comprises:

and acquiring a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, wherein the gas mixture parameter is the ratio of the fuel gas and the air in the cylinder.

5. The method of claim 4, wherein said determining an air charge correction factor based on said mixture parameter comprises:

judging whether the gas mixture parameter is larger than a first preset threshold value or not, and if so, enabling the air charge correction factor to be larger than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1.

6. An inflation control system for a motor vehicle, the inflation control system comprising:

a first parameter acquisition module for acquiring a measured inflation parameter of the motor vehicle;

a second parameter acquisition module for acquiring parameters of a mixture in the motor vehicle engine;

the activation condition judgment module is used for judging whether the measured inflation parameters meet the correction conditions, and if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to trigger the first parameter acquisition module;

and the inflation parameter correction module is used for correcting the measured inflation parameters according to the inflation quantity correction factor so as to obtain corrected inflation parameters.

7. The system of claim 6, wherein the first parameter acquisition module is specifically configured to acquire an intake air amount change parameter measured by a hot film air flow meter of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

And acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle.

8. The system of claim 7, wherein the activation condition determination module is specifically configured to determine that the measured charge correction parameter satisfies a correction condition when an intake air amount change parameter measured by a hot film air flow meter of the motor vehicle is greater than a first threshold, or when a throttle opening change rate of the motor vehicle is greater than a second threshold, or when an intake air amount change parameter measured by a pressure sensor of the motor vehicle is greater than a third threshold.

9. The system of claim 6, wherein the second parameter acquisition module is specifically configured to acquire a mixture parameter measured by a mixture sensor of the motor vehicle, the mixture parameter being a ratio of in-cylinder fuel gas to air.

10. The system of claim 9, wherein the activation condition determining module determines an air charge correction factor according to the air mixture parameter, specifically, determines whether the air mixture parameter is greater than a first preset threshold, and if so, makes the air charge correction factor greater than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1.

Technical Field

The application relates to the technical field of vehicle engineering, in particular to a method and a system for controlling inflation quantity.

Background

During the calibration of the engine of a motor vehicle, the charge (or intake air) is an important parameter that affects the fuel injection quantity of the engine. Under a dynamic condition (namely the stepping depth of an accelerator pedal is constantly changed), the pressure change in the air inlet pipe may have a large difference from the air charging quantity in the engine cylinder, so that the change of the air charging quantity measured in the air inlet system cannot truly reflect the change of the air charging quantity in the cylinder.

In addition, since the naturally aspirated engine injects fuel before the intake valve is opened to sufficiently atomize the fuel, the dead time (which is the time when the charge gas reaches the cylinder of the engine from the charge amount measurement position of the intake system) between the intake air amount used to calculate the fuel injection amount and the actual intake air amount at the time of closing the intake valve is objectively present, and the charge amount before the intake valve at the time of closing the intake valve cannot be truly reflected by the measured charge amount. Therefore, the larger deviation between the charging quantity used for calculating the fuel injection quantity and the actual charging quantity in the cylinder is possible, so that the fuel injection quantity calculated by the engine according to the charging quantity with the larger deviation from the actual charging quantity and the actually required fuel injection quantity have the larger deviation, the condition that the mixed gas in the cylinder is too rich or too lean is caused, and the adverse effect is further brought to the running smoothness of the motor vehicle.

Disclosure of Invention

In order to solve the technical problem, the application provides a method and a system for controlling the air inflation quantity, so as to realize the purpose of correcting the measured air inflation parameter to enable the measured air inflation parameter to be closer to the actual air inflow of an engine. The fuel injection quantity calculated by the engine according to the air charging quantity with larger deviation from the actual air charging quantity is prevented from having larger deviation from the actually required fuel injection quantity, so that the condition that the mixed gas in the cylinder is too thick or too thin is caused, and the running smoothness of the motor vehicle is improved.

In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:

a control method of an inflation amount, which is applied to a motor vehicle, comprises the following steps:

obtaining measured inflation parameters for the motor vehicle;

acquiring parameters of a mixture in the motor vehicle engine;

judging whether the measured inflation parameters meet the correction conditions, if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to the step of obtaining the measured inflation parameters of the motor vehicle;

and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

Optionally, the obtaining measured inflation parameters of the motor vehicle comprises:

acquiring an air intake quantity change parameter measured by a hot film air flow measuring instrument of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

And acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle.

Optionally, the determining whether the measured inflation parameter meets the correction condition includes:

determining that the measured charge correction parameter satisfies a correction condition when an intake air amount change parameter measured by a hot film air flow meter of the motor vehicle is greater than a first threshold, or when a throttle opening change rate of the motor vehicle is greater than a second threshold, or when an intake air amount change parameter measured by a pressure sensor of the motor vehicle is greater than a third threshold.

Optionally, the acquiring of the mixture parameter in the motor vehicle engine includes:

and acquiring a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, wherein the gas mixture parameter is the ratio of the fuel gas and the air in the cylinder.

Optionally, the determining an inflation quantity correction factor according to the mixture parameter includes:

judging whether the gas mixture parameter is larger than a first preset threshold value or not, and if so, enabling the air charge correction factor to be larger than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1.

An inflation control system for a motor vehicle, the inflation control system comprising:

a first parameter acquisition module for acquiring a measured inflation parameter of the motor vehicle;

a second parameter acquisition module for acquiring parameters of a mixture in the motor vehicle engine;

the activation condition judgment module is used for judging whether the measured inflation parameters meet the correction conditions, and if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to trigger the first parameter acquisition module;

and the inflation parameter correction module is used for correcting the measured inflation parameters according to the inflation quantity correction factor so as to obtain corrected inflation parameters.

Optionally, the first parameter obtaining module is specifically configured to obtain an intake air amount variation parameter measured by a hot film air flow meter of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

And acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle.

Optionally, the activation condition determining module is specifically configured to determine that the measured charge correction parameter satisfies the correction condition when the intake air amount change parameter measured by the hot film air flow meter of the motor vehicle is greater than a first threshold, or when the throttle opening change rate of the motor vehicle is greater than a second threshold, or when the intake air amount change parameter measured by the pressure sensor of the motor vehicle is greater than a third threshold.

Optionally, the second parameter obtaining module is specifically configured to obtain a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, where the gas mixture parameter is a ratio of fuel gas and air in a cylinder.

Optionally, the activation condition determining module determines an air charge correction factor according to the air mixture parameter, specifically, to determine whether the air mixture parameter is greater than a first preset threshold, and if so, makes the air charge correction factor greater than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1.

It can be seen from the foregoing technical solutions that the embodiments of the present application provide a method and a system for controlling an inflation amount, where after obtaining a measured inflation parameter of a motor vehicle, when it is determined that the measured inflation parameter satisfies a correction condition, it is considered that there may be a large deviation between the measured inflation parameter measured in an intake system of the motor vehicle and an actual intake air amount in an engine cylinder, at this time, an inflation amount correction factor is determined according to an obtained mixture parameter, and the measured inflation parameter is corrected by using the inflation amount correction factor, so as to obtain a corrected inflation parameter, so that an inflation amount calculated by the motor vehicle according to the corrected inflation parameter approaches to an actual intake air amount in the engine, thereby achieving a purpose that the corrected inflation parameter is closer to an actual intake air amount of the engine. The fuel injection quantity calculated by the engine according to the air charge quantity with larger deviation from the actual air charge quantity is avoided, and the fuel injection quantity actually required has larger deviation, so that the condition that the mixed gas in the cylinder is too thick or too thin is caused, and the running smoothness of the motor vehicle is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic flow chart diagram illustrating a method for controlling an amount of charge according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic flow chart illustrating a method for controlling an amount of charge according to another embodiment of the present application;

FIG. 3 is a schematic flow chart illustrating a method for controlling an amount of charge according to yet another embodiment of the present application;

FIG. 4 is a schematic flow chart illustrating a method for controlling an amount of inflation according to yet another embodiment of the present application;

FIG. 5 is a flow chart illustrating a method for controlling an amount of inflation as provided in an alternative embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a control method of the inflation amount, which is applied to a motor vehicle as shown in fig. 1, and the control method of the inflation amount comprises the following steps:

s101: obtaining measured inflation parameters for the motor vehicle;

s102: acquiring parameters of a mixture in the motor vehicle engine;

s103: judging whether the measured inflation parameters meet the correction conditions, if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to the step of obtaining the measured inflation parameters of the motor vehicle;

s104: and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

In this embodiment, after the measured inflation parameter of the motor vehicle is obtained, when it is determined that the measured inflation parameter meets the correction condition, that is, it is considered that there may be a large deviation between the measured inflation parameter measured in the intake system of the motor vehicle and the actual intake air amount in the engine cylinder, at this time, an inflation amount correction factor is determined according to the obtained mixture parameter, and the measured inflation parameter is corrected by using the inflation amount correction factor to obtain a corrected inflation parameter, so that the inflation amount calculated by the motor vehicle according to the corrected inflation parameter approaches the actual intake air amount in the engine, thereby achieving the purpose of making the corrected inflation parameter closer to the actual intake air amount of the engine. The fuel injection quantity calculated by the engine according to the air charge quantity with larger deviation from the actual air charge quantity is avoided, and the fuel injection quantity actually required has larger deviation, so that the condition that the mixed gas in the cylinder is too thick or too thin is caused, and the running smoothness of the motor vehicle is improved.

On the basis of the above embodiments, in an embodiment of the present application, as shown in fig. 2, the method for controlling the inflation amount includes:

s201: acquiring an air intake quantity change parameter measured by a hot film air flow measuring instrument of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

Acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle;

s202: acquiring parameters of a mixture in the motor vehicle engine;

s203: judging whether the measured inflation parameters meet the correction conditions, if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to the step of obtaining the measured inflation parameters of the motor vehicle;

s204: and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

In the embodiment, the type and the measuring mode of the measured inflation parameter are specified, and specifically, the measured inflation parameter may be an intake air amount change parameter measured by a hot film air flow measuring instrument, a throttle opening change rate of a motor vehicle, or an intake air amount change parameter measured by a pressure sensor of the motor vehicle.

Accordingly, referring to fig. 3, the method for controlling the amount of inflation includes:

s301: acquiring an air intake quantity change parameter measured by a hot film air flow measuring instrument of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

Acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle;

s302: acquiring parameters of a mixture in the motor vehicle engine;

s303: when the intake air amount change parameter measured by a hot film air flow measuring instrument of the motor vehicle is larger than a first threshold value, or when the throttle opening change rate of the motor vehicle is larger than a second threshold value, or when the intake air amount change parameter measured by a pressure sensor of the motor vehicle is larger than a third threshold value, the measured inflation correction parameter is judged to meet a correction condition, and then an inflation correction factor is determined according to the air mixture parameter; returning to the step of obtaining the measured inflation parameters of the motor vehicle when the measured inflation correction parameters do not satisfy the correction condition;

s304: and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

In the present embodiment, a specific method of determining whether or not the measured air parameter satisfies the correction condition when the measured inflation parameter is any one of an intake air amount change parameter measured by a hot film air flow meter, a throttle opening change rate of a motor vehicle, and an intake air amount change parameter measured by a pressure sensor of a motor vehicle is provided.

It should be noted that the first threshold and the third threshold are both determination thresholds of the intake air amount variation parameter, where the first threshold is used to determine whether the intake air amount measured by the hot film air flow meter satisfies the correction condition, and the third threshold is used to determine whether the intake air amount variation parameter measured by the pressure sensor satisfies the correction condition.

In another embodiment of the present application, as shown in fig. 4, based on the above-mentioned embodiment, the method for controlling the inflation amount includes:

s401: obtaining measured inflation parameters for the motor vehicle;

s402: acquiring a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, wherein the gas mixture parameter is the ratio of fuel gas and air in a cylinder;

s403: judging whether the measured inflation parameters meet the correction conditions, if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to the step of obtaining the measured inflation parameters of the motor vehicle;

s404: and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

In the present embodiment, a specific way of obtaining the air-fuel mixture parameter is provided, that is, the air-fuel mixture parameter in the cylinder can be measured by an air-fuel mixture sensor of the motor vehicle, and the air-fuel mixture parameter is a ratio of fuel gas and air in the cylinder. When the engine is a gasoline engine, the fuel gas is gasoline gas, and when the engine is a diesel engine, the fuel gas is diesel gas.

In another embodiment of the present application, as shown in fig. 5, based on the above embodiment, the method for controlling the inflation amount includes:

s501: obtaining measured inflation parameters for the motor vehicle;

s502: acquiring a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, wherein the gas mixture parameter is the ratio of fuel gas and air in a cylinder;

s503: when the measured inflation parameters meet the correction conditions, judging whether the gas mixture parameters are larger than a first preset threshold value, if so, enabling the inflation quantity correction factor to be larger than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1;

returning to the step of obtaining the measured inflation parameters of the motor vehicle when the measured inflation parameters do not meet the correction conditions;

s504: and correcting the measured inflation parameters according to the inflation quantity correction factor to obtain corrected inflation parameters.

In this embodiment, a specific method for determining the correction factor of the air charge amount according to the air charge amount parameter is defined, that is, when the air charge amount parameter is greater than a first preset threshold, it is considered that the air charge amount in an engine cylinder of the motor vehicle is too rich, so that the correction factor of the air charge amount is greater than 1, the product of the correction factor of the air charge amount and the measured air charge parameter is obtained as the corrected air charge parameter, and the value of the corrected air charge parameter is greater than the measured air charge parameter, so as to inform that the air charge amount currently used for calculating the fuel injection amount of the motor vehicle is too large, and the value of the air charge amount needs to be reduced, so that fuel injection of the engine is reduced.

When the gas mixture parameter is smaller than a second preset threshold value, the gas mixture in an engine cylinder of the motor vehicle is considered to be too lean, so that the air charge correction factor is smaller than 1, the product of the air charge correction factor and the measured air charge parameter is used for obtaining the corrected air charge parameter, and the value of the corrected air charge parameter is smaller than the measured air charge parameter, so that the motor vehicle is informed that the air charge for calculating the oil injection quantity is too small at present, and the value of the air charge needs to be increased, so that the engine is enabled to inject oil and the value of the gas mixture parameter is increased.

It should be noted that the first preset threshold and the second preset threshold may be equal or unequal.

When the first preset threshold and the second preset threshold are not equal, the inflation quantity correction factor may be made equal to 1 when the air-fuel mixture parameter is greater than the second preset threshold and smaller than the first preset threshold, that is, the measured inflation parameter is not corrected.

The following describes a control system of the inflation amount provided in the embodiments of the present application, and the control system of the inflation amount described below may be referred to in correspondence with the control method of the inflation amount described above.

The embodiment of the application provides a control system of inflation volume, is applied to motor vehicles, the control system of inflation volume includes:

a first parameter acquisition module for acquiring a measured inflation parameter of the motor vehicle;

a second parameter acquisition module for acquiring parameters of a mixture in the motor vehicle engine;

the activation condition judgment module is used for judging whether the measured inflation parameters meet the correction conditions, and if so, determining an inflation quantity correction factor according to the mixed gas parameters; if not, returning to trigger the first parameter acquisition module;

and the inflation parameter correction module is used for correcting the measured inflation parameters according to the inflation quantity correction factor so as to obtain corrected inflation parameters.

Optionally, the first parameter obtaining module is specifically configured to obtain an intake air amount variation parameter measured by a hot film air flow meter of the motor vehicle;

or

Acquiring a throttle opening change rate of the motor vehicle;

or

And acquiring an air intake quantity change parameter measured by a pressure sensor of the motor vehicle.

Optionally, the activation condition determining module is specifically configured to determine that the measured charge correction parameter satisfies the correction condition when the intake air amount change parameter measured by the hot film air flow meter of the motor vehicle is greater than a first threshold, or when the throttle opening change rate of the motor vehicle is greater than a second threshold, or when the intake air amount change parameter measured by the pressure sensor of the motor vehicle is greater than a third threshold.

Optionally, the second parameter obtaining module is specifically configured to obtain a gas mixture parameter measured by a gas mixture sensor of the motor vehicle, where the gas mixture parameter is a ratio of fuel gas and air in a cylinder.

Optionally, the activation condition determining module determines an air charge correction factor according to the air mixture parameter, specifically, to determine whether the air mixture parameter is greater than a first preset threshold, and if so, makes the air charge correction factor greater than 1;

if not, judging whether the gas mixture parameter is smaller than a second preset threshold value, and if so, enabling the air inflation correction factor to be smaller than 1.

In summary, the present application provides a method and a system for controlling an inflation amount, wherein after obtaining a measured inflation parameter of a motor vehicle, when determining that the measured inflation parameter satisfies a modification condition, the method for controlling an inflation amount considers that the measured inflation parameter in an intake system of the motor vehicle may have a large deviation from an actual intake air amount in an engine cylinder, and determines an inflation amount modification factor according to the obtained mixture parameter, and modifies the measured inflation parameter by using the inflation amount modification factor to obtain a modified inflation parameter, so that the inflation amount calculated by the motor vehicle according to the modified inflation parameter is close to the actual intake air amount in the engine, thereby achieving the purpose that the modified inflation parameter is closer to the actual intake air amount of the engine. The fuel injection quantity calculated by the engine according to the air charge quantity with larger deviation from the actual air charge quantity is avoided, and the fuel injection quantity actually required has larger deviation, so that the condition that the mixed gas in the cylinder is too thick or too thin is caused, and the running smoothness of the motor vehicle is improved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.