CN109057981B - Control method and device for engine with double independent air intake systems - Google Patents
Control method and device for engine with double independent air intake systems Download PDFInfo
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- CN109057981B CN109057981B CN201811130264.3A CN201811130264A CN109057981B CN 109057981 B CN109057981 B CN 109057981B CN 201811130264 A CN201811130264 A CN 201811130264A CN 109057981 B CN109057981 B CN 109057981B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
- F02D41/144—Sensor in intake manifold
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The application discloses control method and device of engine with double independent air inlet systems, wherein in the running state of the engine, whether the deviation value of the air inlet pressure of two sides of the engine is not smaller than a preset value is detected, if yes, whether the air inlet pressure value of one side with small air inlet pressure is smaller than the theoretical minimum air inlet pressure value of the current oil injection quantity of the side is judged, if yes, the theoretical oil injection quantity is further determined according to the air inlet pressure value of one side with small air inlet pressure, and the oil injection quantity of one side with large air inlet pressure is controlled to be the theoretical oil injection quantity. The method and the device limit the maximum fuel injection quantity of the side with larger power of the engine in real time by detecting the air inlet pressure deviation of the two sides of the engine, ensure that the power sent out by the two sides of the engine is basically consistent, further ensure the minimum torsional vibration of the crankshaft of the engine, reduce the fault of the crankshaft and prolong the mechanical life of the engine.
Description
Technical Field
The invention relates to an engine control technology, in particular to a control method and a control device for an engine with double independent air intake systems.
Background
The engine with the large cylinder diameter and the double independent air intake systems adopts a double ECU (Electronic Control Unit) controller, and cylinders on two sides of the engine are respectively an A side and a B side. Fig. 1 is a structural layout diagram of a large-bore double-independent air intake system engine, as shown in fig. 1, independent air intake systems are arranged on two sides of A, B, wherein the air intake system on each side comprises an air filter (air filter for short), a turbocharger (supercharger for short) and a intercooler, an ECU1 controls oil injection of an engine a side cylinder, and an ECU2 controls oil injection of an engine B side cylinder.
The engine with the large cylinder diameter and the double independent air inlet systems can have various failure conditions such as air filter blockage, air leakage of an air inlet pipe, abrasion, aging, failure and the like of a supercharger in the long-time use process. This can result in different intake pressures on both sides of the engine when the engine is operating at such conditions for long periods of time at full load. The mechanical service life of the engine is damaged due to different thermal loads on two sides, different abrasion, different torsional vibration applied to a crankshaft and the like.
At present, a common method for solving the above problems is to determine the intake pressure deviation values of the two sides of the intake system according to the engine ECU, report a fault when the intake pressure deviation of the two sides is too large, and then perform fault degradation to limit the maximum power of the engine. The fault degradation refers to a treatment method for limiting the fuel injection quantity, the torque or the rotating speed in order to protect the engine when the engine reports a fault. However, the method does not effectively solve the problems of different work done on two sides of the engine and high torsional vibration of the crankshaft.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling an engine with dual independent intake systems, so as to overcome the problem that the prior art cannot effectively solve the problems of different work done on two sides of the engine and high torsional vibration of a crankshaft due to fault degradation.
In order to achieve the purpose, the invention provides the following technical scheme:
a control method for a dual independent intake system engine, comprising:
detecting whether the deviation value of the air inlet pressure at two sides of the engine exceeds a preset value or not in the running state of the engine;
if so, judging whether the intake pressure value of the side with small intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side;
if so, determining the theoretical oil injection quantity according to the intake pressure value at the side with small intake pressure;
and controlling the fuel injection quantity on the side with large intake pressure as the theoretical fuel injection quantity.
Optionally, the method further includes:
and presetting a corresponding relation between the fuel injection quantity and the intake pressure value range.
Optionally, the determining whether the intake pressure value of the side with the small intake pressure is smaller than the theoretical minimum intake pressure value of the current fuel injection quantity of the side includes:
determining an intake pressure value range corresponding to the fuel injection quantity on the side with small intake pressure according to a preset corresponding relation between the fuel injection quantity and the intake pressure value range;
and judging whether the intake pressure value of the side with the small intake pressure is smaller than the minimum intake pressure value in the determined intake pressure range.
Optionally, determining a theoretical oil injection quantity according to the intake pressure value on the side where the intake pressure is small includes:
determining one or more intake pressure value ranges in which the intake pressure values on the side with low intake pressure are located according to a preset corresponding relation between the fuel injection quantity and the intake pressure value ranges;
when the intake pressure value is in a plurality of intake pressure value ranges, determining an intake pressure range with a mean value closest to the intake pressure value from the plurality of intake pressure value ranges as a target intake pressure range;
and determining the theoretical oil injection quantity corresponding to the target intake pressure range according to the corresponding relation between the pre-configured oil injection quantity and the intake pressure value range.
Optionally, before detecting whether the deviation value of the intake pressure of the two sides of the engine exceeds a preset value, the method further includes:
and determining that the signals of the intake pressure at two sides of the engine are not fault.
A control apparatus of a dual independent intake system engine, comprising:
the air inlet detection module is used for detecting whether the deviation value of the air inlet pressure on the two sides of the engine exceeds a preset value or not in the running state of the engine;
the judgment module is used for judging whether the intake pressure value of the side with the lower intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side when the intake detection module detects that the intake pressure deviation value of the two sides of the engine is not smaller than the preset value;
the oil injection quantity determining module is used for determining the theoretical oil injection quantity according to the intake pressure value on the side with small intake pressure when the judgment result of the judging module is yes;
and the oil injection quantity control module is used for controlling the oil injection quantity on the side with large air inlet pressure to be the theoretical oil injection quantity.
Optionally, the method further includes:
and the configuration module is used for configuring the corresponding relation between the fuel injection quantity and the intake pressure value range in advance.
Optionally, the determining module includes:
the range determining module is used for determining an intake pressure value range corresponding to the fuel injection quantity at the side with small intake pressure according to the corresponding relation between the fuel injection quantity and the intake pressure value range configured in advance;
and the judgment submodule is used for judging whether the intake pressure value of the side with the small intake pressure is smaller than the minimum intake pressure value in the determined intake pressure range.
Optionally, the fuel injection amount determining module includes:
the pressure range determining module is used for determining one or more intake pressure value ranges in which the intake pressure values on the side with low intake pressure are located according to the corresponding relation between the pre-configured fuel injection quantity and the intake pressure value ranges;
the target range determining module is used for determining an intake pressure range with the mean value closest to the intake pressure value from a plurality of intake pressure value ranges as a target intake pressure range when the intake pressure value is in the plurality of intake pressure value ranges;
and the fuel injection quantity determining submodule is used for determining the theoretical fuel injection quantity corresponding to the target intake pressure range according to the corresponding relation between the pre-configured fuel injection quantity and the intake pressure value range.
Optionally, the method further includes:
and the signal determining module is used for determining that the air inlet pressure signals on the two sides of the engine have no fault before the air inlet detecting module detects whether the air inlet pressure deviation value on the two sides of the engine is not less than a preset value.
According to the technical scheme, compared with the prior art, the embodiment of the invention discloses a control method and a control device for a dual-independent air intake system engine. The method and the device limit the maximum fuel injection quantity of the side with larger power of the engine in real time by detecting the air inlet pressure deviation of the two sides of the engine, ensure that the power sent out by the two sides of the engine is basically consistent, further ensure the minimum torsional vibration of the crankshaft of the engine, reduce the fault of the crankshaft and prolong the mechanical life of the engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for controlling an engine with dual independent intake systems according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a method for controlling an engine with dual independent air induction systems according to an embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating a method for determining a theoretical fuel injection quantity according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a control device of a dual independent intake system engine according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a control device of another dual independent air intake system engine disclosed in the embodiment of the invention;
FIG. 6 is a schematic structural diagram of a determining module according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an oil injection amount determining module disclosed in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Fig. 1 is a flowchart illustrating a method for controlling a dual independent intake system engine according to an embodiment of the present invention, and referring to fig. 1, the method for controlling the dual independent intake system engine may include:
step 101: in the running state of the engine, whether the deviation value of the intake pressure of the two sides of the engine exceeds a preset value is detected, and if so, the operation goes to step 102.
And in the running state of the engine, the ECU on the two sides of the engine can be used for respectively detecting the air inlet pressure of the independent air inlet systems on the two sides of the engine in real time. When various conditions such as air filter blockage, air leakage of an air inlet pipe, abrasion, aging and failure of a supercharger occur, the air inlet pressure deviation of the two sides of the engine is overlarge.
In this embodiment, a preset value may be preset, and during the operation of the engine, it is detected in real time whether the intake pressure deviation value on both sides of the engine exceeds the preset value, where the exceeding of the preset value includes a case that the deviation is greater than the preset value, or is greater than or equal to the preset value.
If the judgment result in the step 101 is negative, no processing is performed, normal operation is continued, and the step 101 is repeated.
Step 102: and (4) judging whether the intake pressure value of the side with the small intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side, and if so, entering the step 103.
The corresponding relation between the fuel injection quantity and the range of the air inlet pressure value can be stored in the system in advance, so that whether the air inlet pressure value of the side with small air inlet pressure is smaller than the theoretical minimum air inlet pressure value of the current fuel injection quantity of the side or not can be judged conveniently.
And judging whether the intake pressure value of the side with the small intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side. Actually, whether the condition that the combustion is insufficient exists in the air inflow corresponding to the current fuel injection quantity on the side with small air inlet pressure is judged, if the air inlet pressure is too low, the air inflow is too small, the combustion is insufficient, the power is reduced, and the power output on the two sides of the engine is inconsistent.
If the judgment result is negative, the step 101 can be returned to detect whether the deviation value of the intake pressure on the two sides of the engine exceeds the preset value again.
Step 103: and determining the theoretical oil injection quantity according to the intake pressure value of the side with small intake pressure.
Under normal conditions, the oil injection quantity and the air inlet pressure value have a certain corresponding relation, and the theoretical oil injection quantity corresponding to the air inlet pressure value can be determined according to the corresponding relation.
Step 104: and controlling the fuel injection quantity on the side with large intake pressure as the theoretical fuel injection quantity.
Because the current engine has small air inlet pressure at one side and large air inlet pressure at one side, the power sent by the two sides is different, the crankshaft is further greatly distorted, and in order to reduce the power and the distortion difference at the two sides of the engine, the oil injection quantity at the side with large air inlet pressure is controlled to be the same as the theoretical oil injection quantity corresponding to the air inlet pressure value at the side with small air inlet pressure, so that the power at the two sides of the engine is basically kept consistent, and the crankshaft distortion is reduced.
In the embodiment, the control method of the engine with the double independent air intake systems limits the maximum fuel injection quantity of the side with larger power of the engine in real time by detecting the air intake pressure deviation of the two sides of the engine, so that the power generated by the two sides of the engine is basically consistent, the crankshaft torsional vibration of the engine is further ensured to be minimum, the crankshaft faults are reduced, and the mechanical life of the engine is prolonged.
Fig. 2 is a flowchart illustrating another method for controlling a dual independent intake system engine according to an embodiment of the present invention, and as shown in fig. 2, the method for controlling the dual independent intake system engine may include:
step 201: and presetting a corresponding relation between the fuel injection quantity and the intake pressure value range.
And determining the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value according to the corresponding relation between the fuel injection quantity and the air inlet pressure value under the normal condition. The corresponding relation is configured in advance, and the subsequent use can be conveniently and directly called and consulted.
Step 202: and under the running state of the engine, detecting whether the deviation value of the intake pressure of the two sides of the engine exceeds a preset value, and if so, entering step 203.
Step 203: and determining the range of the intake pressure value corresponding to the fuel injection quantity on the side with small intake pressure according to the preset corresponding relation between the fuel injection quantity and the range of the intake pressure value.
Step 204: and judging whether the intake pressure value on the side with the small intake pressure is smaller than the minimum intake pressure value in the determined intake pressure range, if so, entering step 205.
In the process of the embodiment of the present invention, it may be determined whether the intake pressure value at the side where the intake pressure is small is smaller than the minimum intake pressure value in the determined intake pressure range, that is, the minimum value in the determined intake pressure value range.
Step 205: and determining the theoretical oil injection quantity according to the intake pressure value of the side with small intake pressure.
Step 206: and controlling the fuel injection quantity on the side with large intake pressure as the theoretical fuel injection quantity.
In one specific implementation, the preset corresponding relationship between the fuel injection amount and the intake pressure value range may be a fuel amount limit setting table. For example, the air inlet pressure of the side A of the engine is 1.8bar, the air inlet pressure of the side B of the engine is 2.5bar, the air inlet quantity of 1.8bar is calculated according to the air inlet pressure value, so that the current oil quantity can not be completely combusted, the oil quantity limit percentage is finally obtained by checking a preset oil quantity limit setting table, the oil injection quantity of the side B of the engine is finally controlled to be only 85%, and the power emitted by the side A and the power emitted by the side B of the engine are basically consistent.
In the embodiment, the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value is configured in advance, so that when the air inlet pressure deviation at the two sides of the engine meets the preset condition, the maximum fuel injection quantity at the side with larger engine power is determined and limited conveniently according to the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value, the power sent out by the two sides of the engine is basically consistent, the minimum torsional vibration of the crankshaft of the engine is further ensured, the faults of the crankshaft are reduced, and the mechanical life of the engine is prolonged.
Fig. 3 is a flowchart of determining a theoretical oil injection amount disclosed in an embodiment of the present invention, and with reference to fig. 3, in the above embodiment, determining the theoretical oil injection amount according to the intake pressure value on the side where the intake pressure is small may include:
step 301: and determining one or more intake pressure value ranges in which the intake pressure values on the side with small intake pressure are located according to the preset corresponding relation between the fuel injection quantity and the intake pressure value ranges.
Different fuel injection quantities correspond to different intake pressure value ranges, however, the different intake pressure value ranges may overlap, for example, 100% of fuel injection quantity corresponds to an intake pressure value range of (2.3-2.7) bar, 90% of fuel injection quantity corresponds to an intake pressure value range of (2.0-2.5) bar, and the overlapping portion of the two intake pressure value ranges is (2.3-2.5) bar.
Step 302: when the intake pressure value is in a plurality of intake pressure value ranges, determining an intake pressure range with a mean value closest to the intake pressure value from the plurality of intake pressure value ranges as a target intake pressure range.
In order to ensure the accuracy of regulation, an intake pressure range with the average value closest to the intake pressure value is determined as a target intake pressure range from the plurality of intake pressure value ranges. Wherein the intake pressure value is the intake pressure value of the side with small intake pressure.
Step 303: and determining the theoretical oil injection quantity corresponding to the target intake pressure range according to the corresponding relation between the pre-configured oil injection quantity and the intake pressure value range.
After the range of the air inlet pressure value is determined, the corresponding theoretical oil injection quantity can be directly determined according to the corresponding relation between the pre-configured oil injection quantity and the range of the air inlet pressure value.
In other embodiments, the method for controlling the engine with the dual independent intake systems may further include, before the detecting whether the deviation value of the intake pressure between the two sides of the engine exceeds the preset value: and determining that the signals of the intake pressure on the two sides of the engine are fault-free. Only under the condition that the air inlet pressure signals on the two sides of the engine have no fault, the oil injection quantity determined and controlled according to the air inlet pressure values on the two sides can be ensured to be correct subsequently, and the purposes of reducing the power difference value on the two sides of the engine and reducing the torsional vibration of crankshafts on the two sides of the engine are achieved.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The method is described in detail in the embodiments disclosed above, and the method of the present invention can be implemented by various types of apparatuses, so that the present invention also discloses an apparatus, and the following detailed description will be given of specific embodiments.
Fig. 4 is a schematic structural diagram of a control device of a dual independent intake system engine according to an embodiment of the present invention, and referring to fig. 4, the control device 40 of the dual independent intake system engine may include:
and the air inlet detection module 401 is used for detecting whether the deviation value of the air inlet pressure of the two sides of the engine exceeds a preset value or not in the running state of the engine.
And in the running state of the engine, the ECU on the two sides of the engine can be used for respectively detecting the air inlet pressure of the independent air inlet systems on the two sides of the engine in real time. When various conditions such as air filter blockage, air leakage of an air inlet pipe, abrasion, aging and failure of a supercharger occur, the air inlet pressure deviation of the two sides of the engine is overlarge.
In this embodiment, a preset value may be preset, and during the operation of the engine, it is detected in real time whether the intake pressure deviation value on both sides of the engine exceeds the preset value, where the exceeding of the preset value includes a case that the deviation is greater than the preset value, or is greater than or equal to the preset value.
If the judgment result of the recent detection module 401 is negative, no processing is performed, normal operation is continued, and whether the intake pressure deviation value on the two sides of the engine exceeds the preset value is repeatedly detected.
And a judging module 402, configured to judge whether an intake pressure value at a side where the intake pressure is small is smaller than a theoretical minimum intake pressure value of a current oil injection amount at the side when the intake detecting module 401 detects that the intake pressure deviation value at two sides of the engine is not smaller than a preset value.
The corresponding relation between the fuel injection quantity and the range of the air inlet pressure value can be stored in the system in advance, so that whether the air inlet pressure value of the side with small air inlet pressure is smaller than the theoretical minimum air inlet pressure value of the current fuel injection quantity of the side or not can be judged conveniently.
And judging whether the intake pressure value of the side with the small intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side. Actually, whether the condition that the combustion is insufficient exists in the air inflow corresponding to the current fuel injection quantity on the side with small air inlet pressure is judged, if the air inlet pressure is too low, the air inflow is too small, the combustion is insufficient, the power is reduced, and the power output on the two sides of the engine is inconsistent.
If the judgment result is negative, the air inlet detection module 401 detects whether the deviation value of the air inlet pressure of the two sides of the engine exceeds the preset value again.
And an oil injection amount determining module 403, configured to determine a theoretical oil injection amount according to the intake pressure value on the side where the intake pressure is small when the determination result of the determining module 402 is yes.
Under normal conditions, the oil injection quantity and the air inlet pressure value have a certain corresponding relation, and the theoretical oil injection quantity corresponding to the air inlet pressure value can be determined according to the corresponding relation.
And the fuel injection amount control module 404 is configured to control the fuel injection amount on the side where the intake pressure is large to be the theoretical fuel injection amount.
Because the current engine has small air inlet pressure at one side and large air inlet pressure at one side, the power sent by the two sides is different, the crankshaft is further greatly distorted, and in order to reduce the power and the distortion difference at the two sides of the engine, the oil injection quantity at the side with large air inlet pressure is controlled to be the same as the theoretical oil injection quantity corresponding to the air inlet pressure value at the side with small air inlet pressure, so that the power at the two sides of the engine is basically kept consistent, and the crankshaft distortion is reduced.
In the embodiment, the control device of the engine with the double independent air inlet systems limits the maximum fuel injection quantity of the side with larger power of the engine in real time by detecting the air inlet pressure deviation of the two sides of the engine, so that the power emitted by the two sides of the engine is basically consistent, the crankshaft torsional vibration of the engine is further ensured to be minimum, the crankshaft faults are reduced, and the mechanical life of the engine is prolonged.
Fig. 5 is a schematic structural diagram of another control device for a dual independent intake system engine according to an embodiment of the present invention, and as shown in fig. 5, the control device 50 for the dual independent intake system engine may include:
the configuration module 501 is configured to pre-configure a corresponding relationship between an oil injection amount and an intake pressure value range.
And determining the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value according to the corresponding relation between the fuel injection quantity and the air inlet pressure value under the normal condition. The corresponding relation is configured in advance, and the subsequent use can be conveniently and directly called and consulted.
And the air inlet detection module 401 is used for detecting whether the deviation value of the air inlet pressure of the two sides of the engine exceeds a preset value or not in the running state of the engine.
And a judging module 402, configured to judge whether an intake pressure value at a side where the intake pressure is small is smaller than a theoretical minimum intake pressure value of a current oil injection amount at the side when the intake detecting module 401 detects that the intake pressure deviation value at two sides of the engine is not smaller than a preset value.
And an oil injection amount determining module 403, configured to determine a theoretical oil injection amount according to the intake pressure value on the side where the intake pressure is small when the determination result of the determining module 402 is yes.
And the fuel injection amount control module 404 is configured to control the fuel injection amount on the side where the intake pressure is large to be the theoretical fuel injection amount.
In one specific implementation, the preset corresponding relationship between the fuel injection amount and the intake pressure value range may be a fuel amount limit setting table. For example, the air inlet pressure of the side A of the engine is 1.8bar, the air inlet pressure of the side B of the engine is 2.5bar, the air inlet quantity of 1.8bar is calculated according to the air inlet pressure value, so that the current oil quantity can not be completely combusted, the oil quantity limit percentage is finally obtained by checking a preset oil quantity limit setting table, the oil injection quantity of the side B of the engine is finally controlled to be only 85%, and the power emitted by the side A and the power emitted by the side B of the engine are basically consistent.
In the embodiment, the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value is configured in advance, so that when the air inlet pressure deviation at the two sides of the engine meets the preset condition, the maximum fuel injection quantity at the side with larger engine power is determined and limited conveniently according to the corresponding relation between the fuel injection quantity and the range of the air inlet pressure value, the power sent out by the two sides of the engine is basically consistent, the minimum torsional vibration of the crankshaft of the engine is further ensured, the faults of the crankshaft are reduced, and the mechanical life of the engine is prolonged.
In the above embodiment, the determining module 402 may specifically refer to fig. 6, and as shown in fig. 6, the determining module 402 may include: a range determination module 601 and a decision sub-module 602.
The range determining module 601 is configured to determine, according to a preset correspondence between an oil injection amount and an intake pressure value range, an intake pressure value range corresponding to the oil injection amount on the side with a small intake pressure.
The determining submodule 602 is configured to determine whether an intake pressure value of a side where the intake pressure is small is smaller than a minimum intake pressure value in the determined intake pressure range.
In the process of the embodiment of the present invention, it may be determined whether the intake pressure value at the side where the intake pressure is small is smaller than the minimum intake pressure value in the determined intake pressure range, that is, the minimum value in the determined intake pressure value range.
Fig. 7 is a schematic structural diagram of an oil injection amount determining module disclosed in an embodiment of the present invention, and as shown in fig. 7, the oil injection amount determining module 403 may include:
the pressure range determining module 701 is configured to determine one or more intake pressure value ranges where the intake pressure values on the side where the intake pressure is small are located according to a preset corresponding relationship between the fuel injection amount and the intake pressure value ranges.
Different fuel injection quantities correspond to different intake pressure value ranges, however, the different intake pressure value ranges may overlap, for example, 100% of fuel injection quantity corresponds to an intake pressure value range of (2.3-2.7) bar, 90% of fuel injection quantity corresponds to an intake pressure value range of (2.0-2.5) bar, and the overlapping portion of the two intake pressure value ranges is (2.3-2.5) bar.
A target range determination module 702, configured to determine, when the intake pressure value is in a plurality of intake pressure value ranges, an intake pressure range with a mean value closest to the intake pressure value from the plurality of intake pressure value ranges as a target intake pressure range.
In order to ensure the accuracy of regulation, an intake pressure range with the average value closest to the intake pressure value is determined as a target intake pressure range from the plurality of intake pressure value ranges. Wherein the intake pressure value is the intake pressure value of the side with small intake pressure.
The fuel injection amount determining submodule 703 is configured to determine a theoretical fuel injection amount corresponding to the target intake pressure range according to a preset correspondence between the fuel injection amount and the intake pressure value range.
After the range of the air inlet pressure value is determined, the corresponding theoretical oil injection quantity can be directly determined according to the corresponding relation between the pre-configured oil injection quantity and the range of the air inlet pressure value.
In other embodiments, the control device of the engine with the dual independent air intake systems may further include a signal determination module, configured to determine that the air intake pressure signals on both sides of the engine are not faulty before the air intake detection module detects whether the deviation value of the air intake pressure on both sides of the engine is not less than a preset value. Only under the condition that the air inlet pressure signals on the two sides of the engine have no fault, the oil injection quantity determined and controlled according to the air inlet pressure values on the two sides can be ensured to be correct subsequently, and the purposes of reducing the power difference value on the two sides of the engine and reducing the torsional vibration of crankshafts on the two sides of the engine are achieved.
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 device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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.
Claims (10)
1. A control method for a dual independent intake system engine, comprising:
detecting whether the deviation value of the air inlet pressure at two sides of the engine exceeds a preset value or not in the running state of the engine;
if so, judging whether the intake pressure value of the side with small intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side;
if so, determining the theoretical oil injection quantity according to the intake pressure value at the side with small intake pressure;
and controlling the fuel injection quantity on the side with large intake pressure as the theoretical fuel injection quantity.
2. The control method of a dual independent intake system engine according to claim 1, further comprising:
and presetting a corresponding relation between the fuel injection quantity and the intake pressure value range.
3. The control method of the engine with the double independent intake systems according to claim 2, wherein the determining whether the intake pressure value on the side where the intake pressure is small is smaller than the theoretical minimum intake pressure value of the current fuel injection amount on the side includes:
determining an intake pressure value range corresponding to the fuel injection quantity on the side with small intake pressure according to a preset corresponding relation between the fuel injection quantity and the intake pressure value range;
and judging whether the intake pressure value of the side with the small intake pressure is smaller than the minimum intake pressure value in the determined intake pressure range.
4. The control method of the engine with the double independent air intake systems according to claim 2, wherein the determining of the theoretical oil injection amount according to the intake pressure value on the side where the intake pressure is small comprises:
determining one or more intake pressure value ranges in which the intake pressure values on the side with low intake pressure are located according to a preset corresponding relation between the fuel injection quantity and the intake pressure value ranges;
when the intake pressure value is in a plurality of intake pressure value ranges, determining an intake pressure range with a mean value closest to the intake pressure value from the plurality of intake pressure value ranges as a target intake pressure range;
and determining the theoretical oil injection quantity corresponding to the target intake pressure range according to the corresponding relation between the pre-configured oil injection quantity and the intake pressure value range.
5. The control method of the engine with the double independent air intake systems according to claim 1, characterized by further comprising, before the detecting whether the deviation value of the intake pressure on the two sides of the engine exceeds a preset value:
and determining that the signals of the intake pressure at two sides of the engine are not fault.
6. A control device for a dual independent intake system engine, comprising:
the air inlet detection module is used for detecting whether the deviation value of the air inlet pressure on the two sides of the engine exceeds a preset value or not in the running state of the engine;
the judgment module is used for judging whether the intake pressure value of the side with the lower intake pressure is smaller than the theoretical minimum intake pressure value of the current oil injection quantity of the side when the intake detection module detects that the intake pressure deviation value of the two sides of the engine is not smaller than the preset value;
the oil injection quantity determining module is used for determining the theoretical oil injection quantity according to the intake pressure value on the side with small intake pressure when the judgment result of the judging module is yes;
and the oil injection quantity control module is used for controlling the oil injection quantity on the side with large air inlet pressure to be the theoretical oil injection quantity.
7. The control device of the dual independent intake system engine according to claim 6, characterized by further comprising:
and the configuration module is used for configuring the corresponding relation between the fuel injection quantity and the intake pressure value range in advance.
8. The control device of the engine with the dual independent intake systems according to claim 7, wherein the determination module includes:
the range determining module is used for determining an intake pressure value range corresponding to the fuel injection quantity at the side with small intake pressure according to the corresponding relation between the fuel injection quantity and the intake pressure value range configured in advance;
and the judgment submodule is used for judging whether the intake pressure value of the side with the small intake pressure is smaller than the minimum intake pressure value in the determined intake pressure range.
9. The control device of the dual independent intake system engine according to claim 7, wherein the fuel injection amount determination module includes:
the pressure range determining module is used for determining one or more intake pressure value ranges in which the intake pressure values on the side with low intake pressure are located according to the corresponding relation between the pre-configured fuel injection quantity and the intake pressure value ranges;
the target range determining module is used for determining an intake pressure range with the mean value closest to the intake pressure value from a plurality of intake pressure value ranges as a target intake pressure range when the intake pressure value is in the plurality of intake pressure value ranges;
and the fuel injection quantity determining submodule is used for determining the theoretical fuel injection quantity corresponding to the target intake pressure range according to the corresponding relation between the pre-configured fuel injection quantity and the intake pressure value range.
10. The control device of the dual independent intake system engine according to claim 6, characterized by further comprising:
and the signal determining module is used for determining that the air inlet pressure signals on the two sides of the engine have no fault before the air inlet detecting module detects whether the air inlet pressure deviation value on the two sides of the engine is not less than a preset value.
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| CN201811130264.3A CN109057981B (en) | 2018-09-27 | 2018-09-27 | Control method and device for engine with double independent air intake systems |
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| CN201811130264.3A CN109057981B (en) | 2018-09-27 | 2018-09-27 | Control method and device for engine with double independent air intake systems |
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| CN102322375A (en) * | 2011-08-23 | 2012-01-18 | 北京理工大学 | Left-right air inlet header pipe communicating device for V-shaped multi-cylinder engine |
| JP6007504B2 (en) * | 2012-02-13 | 2016-10-12 | いすゞ自動車株式会社 | diesel engine |
| CN103527357A (en) * | 2013-10-18 | 2014-01-22 | 无锡动力工程股份有限公司 | Air intake pipeline structure for double-line engine |
| CN103670837B (en) * | 2013-12-29 | 2015-10-28 | 长城汽车股份有限公司 | A kind of twin turbocharged engine air inlet pipeline |
| CN104863763A (en) * | 2015-05-27 | 2015-08-26 | 无锡开普动力有限公司 | Supercharging and inter-cooling structure of engine |
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