CN111636972A - Method and apparatus for reducing wear of engine valve guide - Google Patents
Method and apparatus for reducing wear of engine valve guide Download PDFInfo
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- CN111636972A CN111636972A CN202010470823.6A CN202010470823A CN111636972A CN 111636972 A CN111636972 A CN 111636972A CN 202010470823 A CN202010470823 A CN 202010470823A CN 111636972 A CN111636972 A CN 111636972A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
- F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The disclosure provides a method and a device for reducing abrasion of an engine valve guide pipe, and belongs to the field of engine control. The method comprises the following steps: acquiring the rotating speed, the load and the optimal exhaust temperature of a valve guide pipe of the engine under various working conditions; measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition; according to the actual rotating speed and the actual load of the engine, the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe are referred to, and the optimal exhaust temperature corresponding to the actual working conditions is determined; and correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition. The method can fundamentally improve the problem of valve guide abrasion.
Description
Technical Field
The disclosure belongs to the field of engine control, and particularly relates to a method and a device for reducing abrasion of an engine valve guide pipe.
Background
The valve guide pipe of the engine can ensure that the valve does reciprocating linear motion and can also transfer the heat of the valve rod to the cylinder cover.
The exhaust flow in the valve guide pipe can cause the exhaust temperature in the valve guide pipe to rise, so that the valve guide pipe is abraded, the valve is not closed tightly, and the performance is lowered. In the related art, in order to avoid wear of the valve guide, it is necessary to periodically replace the valve guide, thereby ensuring its performance.
However, the above method solves the problem of wear of the valve guide by replacing the valve guide, and cannot fundamentally improve the problem of wear of the valve guide.
Disclosure of Invention
The embodiment of the disclosure provides a method and a device for reducing abrasion of an engine valve guide pipe, which can fundamentally improve the problem of abrasion of the valve guide pipe. The technical scheme is as follows:
in a first aspect, embodiments of the present disclosure provide a method for reducing wear of an engine valve guide, the method comprising:
acquiring the rotating speed, the load and the optimal exhaust temperature of a valve guide pipe of the engine under various working conditions;
measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition;
according to the actual rotating speed and the actual load of the engine, the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe are referred to, and the optimal exhaust temperature corresponding to the actual working conditions is determined;
and correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
Optionally, the obtaining of the optimal exhaust temperature of the valve guide and the rotation speed and the load of the engine under various working conditions comprises:
establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate;
substituting the rotating speed and the load of the engine under each working condition into the rectangular coordinate system so as to obtain a plurality of working condition coordinate points;
and establishing a relation table, wherein the relation table is used for representing the optimal exhaust temperature corresponding to each working condition coordinate point.
Optionally, the determining the optimal exhaust temperature corresponding to the actual operating condition includes:
substituting the actual rotating speed and the actual load of the engine into the rectangular coordinate system to obtain the working condition coordinate point corresponding to the actual working condition;
and obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
Optionally, the correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition includes:
drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
determining an ignition angle correction coefficient of the engine according to the difference value between the ignition angle corresponding to the actual exhaust temperature and the ignition angle corresponding to the optimal exhaust temperature on the basis of the ignition angle efficiency curve;
and correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
Optionally, the correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual operating condition further includes:
drawing an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
determining an air-fuel ratio correction coefficient of the engine according to the air-fuel ratio corresponding to the actual exhaust temperature based on the air-fuel ratio efficiency curve;
and correcting the air-fuel ratio of the engine according to the air-fuel ratio correction coefficient of the engine.
In a second aspect, embodiments of the present disclosure provide an apparatus for reducing wear of an engine valve guide, the apparatus comprising:
the reference module is used for acquiring the rotating speed and the load of the engine under different working conditions and the optimal exhaust temperature of the valve guide pipe;
the measuring module is used for measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition;
the optimal exhaust temperature determining module is used for determining the optimal exhaust temperature corresponding to the actual working condition by referring to the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe according to the actual rotating speed and the actual load of the engine;
and the correction module is used for correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature of the valve guide pipe and the actual exhaust temperature of the valve guide pipe.
Optionally, the reference module comprises:
the rectangular coordinate system module is used for establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate;
the working condition coordinate point module is used for substituting the rotating speed and the load of the engine under each working condition into the rectangular coordinate system so as to obtain a plurality of working condition coordinate points;
and the relation table module is used for establishing a relation table, and the relation table is used for representing the optimal exhaust temperature corresponding to each working condition coordinate point.
Optionally, the optimum exhaust temperature determination module comprises:
the actual working condition coordinate point determining module is used for substituting the actual rotating speed and the actual load of the engine into the rectangular coordinate system to obtain the working condition coordinate point corresponding to the actual working condition;
and the actual working condition optimal exhaust temperature determining module is used for obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
Optionally, the correction module includes:
the ignition angle efficiency curve module is used for drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
the ignition angle correction coefficient module is used for determining an ignition angle correction coefficient of the engine according to a difference value between an ignition angle corresponding to the actual exhaust temperature and an ignition angle corresponding to the optimal exhaust temperature based on the ignition angle efficiency curve;
and the ignition angle correction module is used for correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
Optionally, the correction module includes:
the air-fuel ratio efficiency curve module is used for drawing an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
the air-fuel ratio correction coefficient module is used for determining an air-fuel ratio correction coefficient of the engine according to the air-fuel ratio corresponding to the actual exhaust temperature based on the air-fuel ratio efficiency curve;
and the air-fuel ratio correction module is used for correcting the air-fuel ratio of the engine according to the air-fuel ratio correction coefficient of the engine.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
according to the method for reducing the abrasion of the valve guide of the engine, firstly, the rotating speed, the load and the optimal exhaust temperature of the valve guide of the engine under various working conditions are obtained, so that the optimal exhaust temperature of the valve guide at the moment is determined through the rotating speed and the load of the engine under the actual working conditions. And then, measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition, so that the optimal exhaust temperature of the valve guide pipe at the moment can be determined conveniently through the rotating speed and the load of the engine under the actual working condition. And then, according to the actual rotating speed and the actual load of the engine, referring to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, determining the optimal exhaust temperature corresponding to the actual working conditions, and according to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, rapidly determining the optimal exhaust temperature of the valve guide pipe. And finally, correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition, and correcting the ignition angle and the air-fuel ratio after comparison to reduce the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide pipe can be reduced, and the abrasion of the valve guide pipe is avoided.
That is to say, the method for reducing the abrasion of the valve guide of the engine provided by the disclosure can correct the ignition angle and the air-fuel ratio of the engine, and can adjust the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide can be reduced, and the problem of the abrasion of the valve guide can be fundamentally solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a method for reducing wear of an engine valve guide provided by an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for reducing wear of an engine valve guide provided by an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an apparatus for reducing wear of an engine valve guide provided by an embodiment of the present disclosure.
The symbols in the drawings represent the following meanings:
1. a reference module; 11. a rectangular coordinate system module; 12. a working condition coordinate point module; 13. a relational table module; 2. a measurement module; 3. an optimal exhaust temperature determination module; 31. an actual working condition coordinate point determining module; 32. the module is used for determining the optimal exhaust temperature under the actual working condition; 4. a correction module; 411. an ignition angle efficiency curve module; 412. an ignition angle correction coefficient module; 413. an ignition angle correction module; 421. an air-fuel ratio efficiency curve module; 422. an air-fuel ratio correction coefficient module; 423. and an air-fuel ratio correction module.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for reducing wear of an engine valve guide, as shown in FIG. 1, according to an embodiment of the present disclosure, the method comprising:
and S101, acquiring the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions.
And S102, measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition.
S103, according to the actual rotating speed and the actual load of the engine, the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions are referred, and the optimal exhaust temperature corresponding to the actual working conditions is determined.
And S104, correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
According to the method for reducing the abrasion of the valve guide of the engine, firstly, the rotating speed, the load and the optimal exhaust temperature of the valve guide of the engine under various working conditions are obtained, so that the optimal exhaust temperature of the valve guide at the moment is determined through the rotating speed and the load of the engine under the actual working conditions. And then, measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition, so that the optimal exhaust temperature of the valve guide pipe at the moment can be determined conveniently through the rotating speed and the load of the engine under the actual working condition. And then, according to the actual rotating speed and the actual load of the engine, referring to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, determining the optimal exhaust temperature corresponding to the actual working conditions, and according to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, rapidly determining the optimal exhaust temperature of the valve guide pipe. And finally, correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition, and correcting the ignition angle and the air-fuel ratio after comparison to reduce the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide pipe can be reduced, and the abrasion of the valve guide pipe is avoided.
That is to say, the method for reducing the abrasion of the valve guide of the engine provided by the disclosure can correct the ignition angle and the air-fuel ratio of the engine, and can adjust the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide can be reduced, and the problem of the abrasion of the valve guide can be fundamentally solved.
In addition, the method can effectively reduce the exhaust temperature, so that the temperature of the valve guide pipe can be stabilized at a certain value. The actual exhaust temperature of the valve guide pipe is calibrated based on the temperature sensor, the actual exhaust temperature is about 30 degrees higher than the optimal exhaust temperature, and the air-fuel ratio and the ignition angle efficiency can be adjusted more quickly under the dynamic working condition to obtain the final target exhaust temperature value. After the method is used, the exhaust temperature can be effectively controlled near high rotating speed and large load. When the dynamic working conditions are changed alternately, the temperature of the valve guide pipe can be indirectly ensured not to exceed the tolerance temperature.
It should be noted that the method provided by the present disclosure is applicable to the fuel-cut-off condition. Under fuel cut conditions, the engine is not operating, at which time the ignition angle and air-fuel ratio of the engine cannot be corrected.
FIG. 2 is a flow chart of another method for reducing wear of an engine valve guide provided by an embodiment of the present disclosure, as shown in FIG. 2, the method comprising:
s201, obtaining the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions.
Therefore, the optimal exhaust temperature of the valve guide pipe at the moment is determined conveniently through the rotating speed and the load of the engine under the actual working condition.
Step S201 includes:
a. and establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate.
b. And substituting the rotating speed and the load of the engine under each working condition into a rectangular coordinate system so as to obtain a plurality of working condition coordinate points.
c. And establishing a relation table, wherein the relation table is used for expressing the optimal exhaust temperature corresponding to each working condition coordinate point.
In this way, the optimal exhaust temperature of the valve guide pipe can be determined directly by looking up the relation table.
The rotation speed is the rotation speed of a crankshaft flywheel of the engine, and the load is the intake air amount of the intake manifold. The multiple working conditions are the corresponding optimal exhaust temperature of the valve guide pipe under different rotating speeds and different loads of the engine. In addition, the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions can be obtained through test tests, and the interference of external factors can be effectively avoided, so that the exhaust temperature of the valve can be regarded as the optimal exhaust temperature.
S202, measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition.
In the present embodiment, the rotation speed of the crankshaft flywheel of the engine is obtained by the rotation speed sensor, the load of the intake manifold is obtained by the position sensor, and the optimal exhaust temperature of the valve guide is measured by the thermocouple.
S203, according to the actual rotating speed and the actual load of the engine, referring to the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe, and determining the optimal exhaust temperature corresponding to the actual working conditions.
Step S203 includes:
a. and substituting the actual rotating speed and the actual load of the engine into the rectangular coordinate system to obtain a working condition coordinate point corresponding to the actual working condition.
b. And obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
In the above embodiment, the optimal exhaust temperature under the actual condition can be quickly determined through the relation table.
If the actual speed and the actual load of the engine fall between the two nearest operating condition coordinates, linear interpolation is performed to obtain the optimal exhaust temperature.
And S204, correcting the ignition angle of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
Step S204 includes:
a. and drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
b. And determining an ignition angle correction coefficient of the engine according to the difference value of the ignition angle corresponding to the actual exhaust temperature and the ignition angle corresponding to the optimal exhaust temperature based on the ignition angle efficiency curve.
c. And correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
In the above embodiment, the ignition angle correction coefficient of the engine can be determined from the ignition angle efficiency curve, and the ignition angle correction coefficient is applied.
It should be noted that the difference between the ignition angle corresponding to the actual exhaust temperature and the ignition angle corresponding to the optimal exhaust temperature is an absolute value, and the difference is substituted into the abscissa of the ignition angle efficiency curve according to the ignition angle efficiency curve, so that the correction coefficient of the corresponding ignition angle can be determined.
And S205, correcting the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
Step S205 includes:
a. and drawing an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
b. An air-fuel ratio correction coefficient of the engine is determined based on an air-fuel ratio efficiency curve according to an air-fuel ratio corresponding to an actual exhaust temperature.
c. And correcting the air-fuel ratio of the engine according to the air-fuel ratio correction coefficient of the engine.
In the above embodiment, the air-fuel ratio correction coefficient of the engine can be determined from the air-fuel ratio efficiency curve, and the air-fuel ratio can be corrected.
It should be noted that, according to the air-fuel ratio efficiency curve, the actual air-fuel ratio of the engine is substituted into the abscissa of the air-fuel ratio efficiency curve, so that the correction coefficient of the corresponding air-fuel ratio can be determined.
In the present embodiment, the ignition angle correction is a product of the ignition angle corresponding to the actual exhaust temperature of the valve guide and the ignition angle correction coefficient. The air-fuel ratio correction is a product of an air-fuel ratio corresponding to an actual exhaust temperature of the valve guide and an air-fuel ratio correction coefficient. And the ignition angle correction coefficient and the air-fuel ratio correction coefficient are not more than 1, so that the ignition angle and the air-fuel ratio can be reduced through correction, the exhaust temperature of the valve guide pipe can be reduced, and the abrasion of the valve guide pipe is avoided.
Optionally, the method further comprises:
and integrating the actual exhaust temperature of the valve guide in unit time period to obtain the exhaust temperature of the valve guide.
In the above embodiment, the actual exhaust temperature of the valve guide per unit time period is integrated to obtain the exhaust temperature of the valve guide. Therefore, the exhaust temperature of the valve guide pipe can be calculated, and then the actual exhaust temperature of the valve guide pipe can be compared with the actual exhaust temperature of the valve guide pipe, so that a basis is provided for correction. In addition, the actual exhaust temperature of the valve guide pipe can be calculated through integration without measurement by a sensor, and the efficiency of determining the actual exhaust temperature of the valve guide pipe is greatly improved.
Illustratively, an integrator is used to integrate the actual exhaust temperature of the valve guide per unit time period.
In the above embodiment, the integrator can perform integration quickly to determine the exhaust temperature of the corrected valve guide.
Illustratively, in the present embodiment, the integrator is a K integrator, and the larger the proportionality coefficient of the K integrator, the faster the integration.
According to the method for reducing the abrasion of the valve guide of the engine, firstly, the rotating speed, the load and the optimal exhaust temperature of the valve guide of the engine under various working conditions are obtained, so that the optimal exhaust temperature of the valve guide at the moment is determined through the rotating speed and the load of the engine under the actual working conditions. And then, measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition, so that the optimal exhaust temperature of the valve guide pipe at the moment can be determined conveniently through the rotating speed and the load of the engine under the actual working condition. And then, according to the actual rotating speed and the actual load of the engine, referring to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, determining the optimal exhaust temperature corresponding to the actual working conditions, and according to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions, rapidly determining the optimal exhaust temperature of the valve guide pipe. And finally, correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition, and correcting the ignition angle and the air-fuel ratio after comparison to reduce the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide pipe can be reduced, and the abrasion of the valve guide pipe is avoided.
That is to say, the method for reducing the abrasion of the valve guide of the engine provided by the disclosure can correct the ignition angle and the air-fuel ratio of the engine, and can adjust the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide can be reduced, and the problem of the abrasion of the valve guide can be fundamentally solved.
Fig. 3 is a schematic structural diagram of an apparatus for reducing wear of an engine valve guide according to an embodiment of the present disclosure, as shown in fig. 3, the apparatus includes:
and the reference module 1 is used for acquiring the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under different working conditions.
Optionally, the reference module 1 comprises:
and the rectangular coordinate system module 11 is used for establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate.
And the working condition coordinate point module 12 is used for substituting the rotating speed and the load of the engine under each working condition into the rectangular coordinate system so as to obtain a plurality of working condition coordinate points.
And the relation table module 13 is used for establishing a relation table, and the relation table is used for indicating the optimal exhaust temperature corresponding to each working condition coordinate point.
And the measuring module 2 is used for measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition.
The optimal exhaust temperature determining module 3 is used for determining the optimal exhaust temperature corresponding to the actual working condition by referring to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions according to the actual rotating speed and the actual load of the engine;
alternatively, the optimum exhaust temperature determination module 3 includes:
and the actual working condition coordinate point determining module 31 is configured to substitute the actual rotation speed and the actual load of the engine into the rectangular coordinate system to obtain a working condition coordinate point corresponding to the actual working condition.
And the actual working condition optimal exhaust temperature determining module 32 is used for obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
And the correction module 4 is used for correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature of the valve guide pipe and the actual exhaust temperature of the valve guide pipe.
Optionally, the modification module 4 includes:
and the ignition angle efficiency curve module 411 is used for drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
And the ignition angle correction coefficient module 412 is configured to determine an ignition angle correction coefficient of the engine according to a difference between an ignition angle corresponding to the actual exhaust temperature and an ignition angle corresponding to the optimal exhaust temperature based on the ignition angle efficiency curve.
And the ignition angle correction module 413 is used for correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
Optionally, the modification module 4 further includes:
and an air-fuel ratio efficiency curve module 421, configured to draw an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual operating condition.
An air-fuel ratio correction coefficient module 422 is configured to determine an air-fuel ratio correction coefficient of the engine based on the air-fuel ratio efficiency curve according to an air-fuel ratio corresponding to the actual exhaust temperature.
The air-fuel ratio correction module 423 corrects the air-fuel ratio of the engine based on the air-fuel ratio correction coefficient of the engine.
For the device for reducing the abrasion of the valve guide of the engine provided by the embodiment of the disclosure, the rotating speed, the load and the optimal exhaust temperature of the valve guide of the engine under various working conditions can be obtained through the reference module, so that the optimal exhaust temperature of the valve guide at the moment can be determined through the rotating speed and the load of the engine under the actual working conditions. Then, the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe under the actual working condition can be measured through the measuring module, so that the optimal exhaust temperature of the valve guide pipe at the moment can be determined through the rotating speed and the load of the engine under the actual working condition. Then, the optimal exhaust temperature determining module can determine the optimal exhaust temperature corresponding to the actual working condition by referring to the rotating speed, the load and the optimal exhaust temperature of the valve guide pipe of the engine under various working conditions according to the actual rotating speed and the actual load of the engine, and the optimal exhaust temperature of the valve guide pipe can be rapidly determined according to the rotating speed, the load and the optimal exhaust temperature of the engine under various working conditions. Finally, the ignition angle and the air-fuel ratio of the engine can be corrected through the correction module according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition, the ignition angle and the air-fuel ratio can be reduced through correcting the ignition angle and the air-fuel ratio after comparison, the exhaust temperature of the valve guide pipe can also be reduced, and therefore abrasion of the valve guide pipe is avoided.
That is to say, the device for reducing the abrasion of the valve guide of the engine provided by the disclosure can correct the ignition angle and the air-fuel ratio of the engine, and can adjust the ignition angle and the air-fuel ratio, so that the exhaust temperature of the valve guide can be reduced, and the abrasion problem of the valve guide can be fundamentally improved.
The above method and apparatus are described below with reference to specific embodiments:
when the rotation speed is 5500rpm and the load is full throttle, the uncorrected front ignition angle is 12.75 degrees, the air-fuel ratio is 0.75, and the exhaust temperature of a valve guide pipe is 820 degrees.
The ignition angle after correction by the above method was reduced to 10.75 degrees, the air-fuel ratio was 0.748, and the exhaust gas temperature of the valve guide was reduced to around 780 degrees. Thus, the ignition angle is reduced, the difference is increased, and the coefficient corresponding to the ignition angle is reduced. The air-fuel ratio decreases and the coefficient corresponding to the air-fuel ratio decreases, thereby lowering the valve guide exhaust gas temperature.
In addition, the part with abnormal wear color of the un-optimized front valve guide pipe has no yellowing trace after high-temperature yellowing trace and optimized and corrected, and the exhaust temperature of the valve guide pipe of the engine is reduced after correction.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A method for reducing wear of an engine valve guide, the method comprising:
acquiring the rotating speed, the load and the optimal exhaust temperature of a valve guide pipe of the engine under various working conditions;
measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition;
according to the actual rotating speed and the actual load of the engine, the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe are referred to, and the optimal exhaust temperature corresponding to the actual working conditions is determined;
and correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition.
2. The method of claim 1, wherein the obtaining optimal exhaust temperatures for engine speed, load, and valve timing under a plurality of operating conditions comprises:
establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate;
substituting the rotating speed and the load of the engine under each working condition into the rectangular coordinate system so as to obtain a plurality of working condition coordinate points;
and establishing a relation table, wherein the relation table is used for representing the optimal exhaust temperature corresponding to each working condition coordinate point.
3. The method of claim 2, wherein the determining the optimal exhaust temperature for the operating condition comprises:
substituting the actual rotating speed and the actual load of the engine into the rectangular coordinate system to obtain the working condition coordinate point corresponding to the actual working condition;
and obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
4. The method of claim 1, wherein the correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition comprises:
drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
determining an ignition angle correction coefficient of the engine according to the difference value between the ignition angle corresponding to the actual exhaust temperature and the ignition angle corresponding to the optimal exhaust temperature on the basis of the ignition angle efficiency curve;
and correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
5. The method of claim 4, wherein the correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual operating condition further comprises:
drawing an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
determining an air-fuel ratio correction coefficient of the engine according to the air-fuel ratio corresponding to the actual exhaust temperature based on the air-fuel ratio efficiency curve;
and correcting the air-fuel ratio of the engine according to the air-fuel ratio correction coefficient of the engine.
6. An apparatus for reducing wear of an engine valve guide, the apparatus comprising:
the reference module is used for acquiring the rotating speed and the load of the engine under different working conditions and the optimal exhaust temperature of the valve guide pipe;
the measuring module is used for measuring the actual rotating speed, the actual load and the actual exhaust temperature of the valve guide pipe of the engine under the actual working condition;
the optimal exhaust temperature determining module is used for determining the optimal exhaust temperature corresponding to the actual working condition by referring to the rotating speed and the load of the engine under various working conditions and the optimal exhaust temperature of the valve guide pipe according to the actual rotating speed and the actual load of the engine;
and the correction module is used for correcting the ignition angle and the air-fuel ratio of the engine according to the optimal exhaust temperature of the valve guide pipe and the actual exhaust temperature of the valve guide pipe.
7. The apparatus of claim 6, wherein the reference module comprises:
the rectangular coordinate system module is used for establishing a rectangular coordinate system by taking the rotating speed of the engine as a horizontal coordinate and the load of the engine as a vertical coordinate;
the working condition coordinate point module is used for substituting the rotating speed and the load of the engine under each working condition into the rectangular coordinate system so as to obtain a plurality of working condition coordinate points;
and the relation table module is used for establishing a relation table, and the relation table is used for representing the optimal exhaust temperature corresponding to each working condition coordinate point.
8. The apparatus of claim 7, wherein the optimal exhaust temperature determination module comprises:
the actual working condition coordinate point determining module is used for substituting the actual rotating speed and the actual load of the engine into the rectangular coordinate system to obtain the working condition coordinate point corresponding to the actual working condition;
and the actual working condition optimal exhaust temperature determining module is used for obtaining the optimal exhaust temperature corresponding to the working condition coordinate point based on the relation table.
9. The apparatus of claim 6, wherein the modification module comprises:
the ignition angle efficiency curve module is used for drawing an ignition angle efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
the ignition angle correction coefficient module is used for determining an ignition angle correction coefficient of the engine according to a difference value between an ignition angle corresponding to the actual exhaust temperature and an ignition angle corresponding to the optimal exhaust temperature based on the ignition angle efficiency curve;
and the ignition angle correction module is used for correcting the ignition angle of the engine according to the ignition angle correction coefficient of the engine.
10. The apparatus of claim 6, wherein the modification module comprises:
the air-fuel ratio efficiency curve module is used for drawing an air-fuel ratio efficiency curve of the engine based on the optimal exhaust temperature and the actual exhaust temperature corresponding to the actual working condition;
the air-fuel ratio correction coefficient module is used for determining an air-fuel ratio correction coefficient of the engine according to the air-fuel ratio corresponding to the actual exhaust temperature based on the air-fuel ratio efficiency curve;
and the air-fuel ratio correction module is used for correcting the air-fuel ratio of the engine according to the air-fuel ratio correction coefficient of the engine.
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| CN202010470823.6A CN111636972A (en) | 2020-05-28 | 2020-05-28 | Method and apparatus for reducing wear of engine valve guide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022083715A1 (en) * | 2020-10-22 | 2022-04-28 | 中国第一汽车股份有限公司 | Ignition angle correction method and apparatus, and device and storage medium |
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