CN108730044A - A kind of variable valve timing control method and device of engine - Google Patents
A kind of variable valve timing control method and device of engine Download PDFInfo
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- CN108730044A CN108730044A CN201710245095.7A CN201710245095A CN108730044A CN 108730044 A CN108730044 A CN 108730044A CN 201710245095 A CN201710245095 A CN 201710245095A CN 108730044 A CN108730044 A CN 108730044A
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- engine
- air valve
- valve angle
- angle
- variable valve
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
-
- 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
- F02D2200/023—Temperature of lubricating oil or working fluid
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- 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
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
-
- 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
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A kind of variable valve timing control method and device of engine, described method includes following steps：According to the pedal signal of automobile residing for engine, select to determine at least one variable valve timing arteries and veins spectrogram from preset multiple variable valve timing arteries and veins spectrograms；According to the water temperature of engine and the rotating speed and load of engine, is calculated using at least one variable valve timing arteries and veins spectrogram and obtain at least one first air valve angle；Environmental pressure residing for engine handles at least one first air valve angle, to obtain preferred air valve angle；The air valve angle of engine is adjusted according to preferred air valve angle.The technical solution provided through the invention enable engine air valve angle in height height above sea level section the best running position of Auto-matching, ensure that the automobile residing for engine can keep Best Economy when low altitude area is run and reach best dynamic property when high altitude localities is run.
Description
Technical field
The present invention relates to automotive engine control fields, more particularly to a kind of variable valve timing controlling party of engine
Method and device.
Background technology
In the differentiation and evolution of engine, and variable valve timing (Variable Valve Timing, referred to as
VVT) technology is increasingly becoming the standard configuration of Modern Engine.Existing variable valve timing technology is mainly according to the fortune of engine
Market condition so that the air capacity into engine reaches optimum level, to influence by adjusting unlatching/closing angle of valve
Gas flow optimized situation of the engine under different rotating speeds and admission pressure, to improve the efficiency of combustion of engine intermediate fuel oil.For
The engine of automobile, for miniaturization engine emerging at present, manufacturer generally all can be from best warp in design
The angle of Ji property is set out, the conscious manifold pressure for increasing engine when engine carries out valve timing so that hair
Motivation obtains preferable intake and exhaust amount with larger throttle opening, to reduce the pumping loss of engine, and improves vapour
The fuel economy of vehicle.
But if the engine of running car automobile at high altitude localities still adopts the manifold set when low altitude area operation
Pressure and air valve angle, then it is more and more thinner with the raising air of height above sea level, easily cause engine that can not obtain enough
Air, and then influence automobile power.This phenomenon reflects especially pronounced on the engine of miniaturization, can seriously affect automobile
Low-speed dynamic.
At this stage, in most cases, the engine of automobile mainly reduces pumping loss by increasing manifold pressure,
Reduce oil consumption.But such scheme may cause automobile that can not obtain enough power when driving in high altitude localities, to vapour
The normally travel of vehicle causes to seriously affect.
Invention content
Present invention solves the technical problem that being that engine possibly can not when running car is in high altitude localities for the prior art
The problem of enough power being provided for automobile.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of variable valve timing control method of engine,
Include the following steps：According to the pedal signal of automobile residing for the engine, from preset multiple variable valve timing arteries and veins spectrograms
Middle selection determines that at least one variable valve timing arteries and veins spectrogram, different variable valve timing arteries and veins spectrograms correspond to different operating modes,
The group of environmental pressure residing for water temperature, the pedal signal and the engine of the operating mode at least based on the engine
It closes and determines；According to the water temperature of the engine and the rotating speed and load of the engine, at least one variable gas is used
Door timing arteries and veins spectrogram, which calculates, obtains at least one first air valve angle, and the variable valve timing arteries and veins spectrogram is for indicating the hair
The correspondence of the rotating speed and load of motivation and the air valve angle of the engine；According to the environmental pressure residing for the engine
At least one first air valve angle is handled, to obtain preferred air valve angle；According to the preferred air valve angle tune
The air valve angle of the engine is saved, the air valve angle includes unlatching and/or the closing angle of the valve of the engine.
Optionally, according to the water temperature of the engine and the rotating speed and load of the engine, described at least one is used
A variable valve timing arteries and veins spectrogram, which calculates, obtains at least one first air valve angle, includes the following steps：According to the engine
Rotating speed and load, at least one variable valve timing arteries and veins spectrogram is searched respectively, to obtain at least one candidate valve angle
The quantity of degree, at least one candidate air valve angle is equal at least one quantity of variable valve timing arteries and veins spectrogram；
The weight of each candidate air valve angle in the multiple candidate air valve angle is determined according to the water temperature；According to the weight to identical
Multiple candidate air valve angles under environmental pressure carry out interpolation calculation respectively, to obtain the first valve angle under each environmental pressure
Degree.
Optionally, the weight of each candidate air valve angle in the multiple candidate air valve angle, packet are determined according to the water temperature
Include following steps：It is tabled look-up in preset water temperature factor graph according to the water temperature, in the multiple candidate air valve angle of determination
The weight of each candidate's air valve angle, the water temperature factor graph are used to indicate the correspondence of the water temperature and the weight.
Optionally, the environmental pressure residing for the engine at least one first air valve angle at
Reason, includes the following steps：The weight of each first air valve angle is determined according to the environmental pressure；
Interpolation calculation is carried out at least one first air valve angle according to the weight of each first air valve angle,
To obtain the preferred air valve angle.
Optionally, the weight that each first air valve angle is determined according to the environmental pressure, includes the following steps：According to institute
State environmental pressure selects the environmental stress factors figure to match as preferred ambient from preset multiple environmental stress factors figures
Press factors figure, the environmental stress factors figure are used to indicate the correspondence of the environmental pressure and the weight；According to institute
It states environmental pressure to table look-up in the preferred ambient press factors figure, with the weight of each first air valve angle of determination.
The embodiment of the present invention also provides a kind of variable valve timing control apparatus of engine, including：Selecting module is used for
According to the pedal signal of automobile residing for the engine, select to determine at least from preset multiple variable valve timing arteries and veins spectrograms
One variable valve timing arteries and veins spectrogram, different variable valve timing arteries and veins spectrograms correspond to different operating modes, the operating mode at least base
The combination of environmental pressure residing for the water temperature of the engine, the pedal signal and the engine determines；Calculate mould
Block, for according to the water temperature of the engine and the rotating speed and load of the engine, using at least one variable gas
Door timing arteries and veins spectrogram, which calculates, obtains at least one first air valve angle, and the variable valve timing arteries and veins spectrogram is for indicating the hair
The correspondence of the rotating speed and load of motivation and the air valve angle of the engine；Processing module, for according to the engine
Residing environmental pressure handles at least one first air valve angle, to obtain preferred air valve angle；Adjustment module,
Air valve angle for adjusting the engine according to the preferred air valve angle, the air valve angle include the engine
The unlatching of valve and/or closing angle.
Optionally, the computing module includes：Submodule is searched, for the rotating speed and load according to the engine, is divided
At least one variable valve timing arteries and veins spectrogram is not searched, it is described at least one to obtain at least one candidate air valve angle
The quantity of candidate air valve angle is equal at least one quantity of variable valve timing arteries and veins spectrogram；First determination sub-module,
Weight for determining each candidate air valve angle in the multiple candidate air valve angle according to the water temperature；First calculates submodule
Block, for carrying out interpolation calculation respectively to multiple candidate air valve angles under identical environmental pressure according to the weight, to obtain
The first air valve angle under each environmental pressure.
Optionally, first determination sub-module includes：First lookup unit is used for according to the water temperature in preset water
It tables look-up in warm factor graph, with the weight of each candidate air valve angle in the multiple candidate air valve angle of determination, the water temperature factor
Correspondence of the figure for indicating the water temperature and the weight.
Optionally, the processing module includes：Second determination sub-module, for determining each according to the environmental pressure
The weight of one air valve angle；Second computational submodule, for according to the weight of each first air valve angle to it is described at least
One the first air valve angle carries out interpolation calculation, to obtain the preferred air valve angle.
Optionally, second determination sub-module includes：Selecting unit, for according to the environmental pressure from preset more
Select the environmental stress factors figure to match as preferred ambient press factors figure, the environment pressure in a environmental stress factors figure
Power factor graph is used to indicate the correspondence of the environmental pressure and the weight；Second lookup unit, for according to the ring
Border pressure is tabled look-up in the preferred ambient press factors figure, with the weight of each first air valve angle of determination.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
According to the water temperature of the engine and the rotating speed and load of the engine, just using at least one changeable air valve
When arteries and veins spectrogram calculate and obtain at least one first air valve angle, wherein at least one variable valve timing arteries and veins spectrogram is root
Determining according to the pedal signal selection of automobile residing for the engine；Then the environmental pressure residing for the engine is to institute
It states at least one first air valve angle to be handled, to obtain preferred air valve angle, and be adjusted according to the preferred air valve angle
Save the air valve angle of the engine.Compared with the existing technology for not considering engine local environment pressure and determining air valve angle
Scheme, the embodiment of the present invention can better assure that the dynamic property demand of automobile when driving in high altitude localities so that the hair
Motivation can be with the best air valve angle of Auto-matching in height height above sea level section, it is ensured that the automobile residing for engine can be in low sea
Area of rising sheer from level ground reaches Best Economy, and is able to maintain that the traveling demand of best power performance in high altitude localities.
Further, it is tabled look-up according to preset water temperature factor graph and determines each candidate air valve angle in multiple candidate air valve angles
Weight, and then interpolation calculation is carried out according to the weight respectively to multiple candidate air valve angles under identical environmental pressure, to obtain
Obtain the first air valve angle under each environmental pressure.Further, it is tabled look-up according to preset environmental stress factors figure and determines each the
The weight of one air valve angle, and then according to the weight of each first air valve angle at least one first air valve angle
Interpolation calculation is carried out, to obtain the preferred air valve angle.So that first air valve angle finally obtained and preferred gas
The amplitude of variation of door angle can when engine run gentle transition, avoid because switch it is too violent due to cause dynamical problem,
Optimize the driving comfort sexual experience of user.
Description of the drawings
Fig. 1 is a kind of flow chart of the variable valve timing control method of engine of the first embodiment of the present invention；
Fig. 2 is a kind of flow chart of the variable valve timing control method of engine of the second embodiment of the present invention；
Fig. 3 is a kind of flow chart of the variable valve timing control method of engine of the third embodiment of the present invention；
Fig. 4 is a kind of structural representation of the variable valve timing control apparatus of engine of the fourth embodiment of the present invention
Figure；And
Fig. 5 is the principle logic chart using the variable valve timing control method of the embodiment of the present invention.
Specific implementation mode
It will be appreciated by those skilled in the art that existing automobile engine is to reduce pumping loss, while reducing oil consumption, generally
Fuel economy is improved by the way of increasing manifold pressure so that engine needs big throttle opening more to obtain
Air enter engine.But when running car is to high altitude localities, if still using acquiescence air valve angle be likely to by
Cause to cannot be introduced into enough air in engine in the reduction of environmental pressure, to influence automobile power.
In order to solve the above-mentioned technical problem, water temperature and the hair of the technical solution of the present invention according to the engine
The rotating speed and load of motivation are calculated using at least one variable valve timing arteries and veins spectrogram and obtain at least one first air valve angle,
Wherein, at least one variable valve timing arteries and veins spectrogram is to select to determine according to the pedal signal of automobile residing for the engine
's；Then the environmental pressure residing for the engine handles at least one first air valve angle, to obtain
It is preferred that air valve angle, and the air valve angle of the engine is adjusted according to the preferred air valve angle.It can better assure that
Dynamic property demand of the automobile in high altitude localities when driving so that the engine can be with Auto-matching in height height above sea level section
Best air valve angle, it is ensured that the automobile residing for engine can reach Best Economy in low altitude area, and in High aititude
Area is able to maintain that the traveling demand of best power performance again.
In a preferred embodiment of the invention, according to the pedal signal of automobile residing for the engine from preset more
It selects to determine at least one variable valve timing arteries and veins spectrogram in a variable valve timing arteries and veins spectrogram, according to the rotating speed of the engine
At least one variable valve timing arteries and veins spectrogram is searched respectively with load, to obtain at least one candidate air valve angle；According to
Water temperature is tabled look-up in preset water temperature factor graph determines the weight of each candidate air valve angle in multiple candidate air valve angles, Jin Ergen
Interpolation calculation is carried out respectively to multiple candidate air valve angles under identical environmental pressure according to the weight, to obtain each environment pressure
The first air valve angle under power；It tables look-up in preset environmental stress factors figure determination further according to the environmental pressure residing for engine
The weight of each first air valve angle, and then according to the weight of each first air valve angle at least one first gas
Door angle carries out interpolation calculation, and to obtain preferred air valve angle, described start finally is adjusted according to the preferred air valve angle
The air valve angle of machine.Enable the engine air valve angle in height height above sea level section the best running position of Auto-matching
It sets, meets different demands of running car when Different Altitude Regions.
It is understandable to enable above-mentioned purpose, feature and the advantageous effect of the present invention to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
Fig. 1 is a kind of flow chart of the variable valve timing control method of engine of the first embodiment of the present invention.Its
In, variable valve timing (Variable Valve Timing, the abbreviation VVT) control of engine is appreciated that as according to hair
The operating condition of motivation adjusts the amount of air inlet/exhaust and the folding time of air valve angle and valve so that enters described
The air capacity of engine reaches optimum state, to improve the efficiency of combustion of fuel oil in engine, increases engine power.
Specifically, in the present embodiment, step S101 is first carried out, is believed according to the pedal of automobile residing for the engine
Number, it selects to determine at least one variable valve timing arteries and veins spectrogram from preset multiple variable valve timing arteries and veins spectrograms, it is different
Variable valve timing arteries and veins spectrogram corresponds to different operating modes, water temperature of the operating mode at least based on the engine, pedal letter
Number and the engine residing for environmental pressure combination determine.It further, can be with according to the water temperature of the engine
The operating mode of the engine is divided into warming-up operating mode or heat engine operating mode；It can be by the engine according to the pedal signal
Operating mode divide into sub-load or idling operation；The operating mode of the engine can be divided into according to the environmental pressure
Low altitude area, intermediate altitude or High aititude.Preferably, according to the water temperature of the engine, the pedal signal and the environment
The combination of pressure, which can determine, obtains 12 kinds of different operating modes, for example, warming-up operating mode, sub-load, low altitude area can be combined into
A kind of operating mode；Heat engine operating mode, idling operation, intermediate altitude can be combined into another operating mode again.Preferably, described 12 kinds it is different
Operating mode corresponds to a variable valve timing arteries and veins spectrogram respectively.In a preference, the pedal signal is driven for distinguishing
Whether the person of sailing steps on the gas, and can consider that the pedal signal is sub-load when driver steps on the gas；Otherwise it is considered that institute
It is idling operation to state pedal signal, this step judges that it is negative that the engine is currently in part by receiving the pedal signal
Lotus or idling operation, if the engine is currently in idling operation, the changeable air valve under described 12 kinds different operating modes
Selection includes 6 kinds of variable valve timing arteries and veins spectrograms of idling operation in timing arteries and veins spectrogram, is used convenient for subsequent step.
It is executed subsequently into step S102, according to the water temperature of the engine and the rotating speed and load of the engine,
It is calculated using at least one variable valve timing arteries and veins spectrogram and obtains at least one first air valve angle, the changeable air valve is just
When arteries and veins spectrogram be used to indicate the correspondence of the rotating speed of the engine and the air valve angle of load and the engine.Specifically
Ground, the load can be used for characterizing the load that the engine is carried, and the numerical value of the load is bigger to be illustrated to need
The torque of engine output is bigger, otherwise smaller.More specifically, the air valve angle include exhaust valve closing angle and/
Or the opening angle of inlet valve.In a preference, calibration has different hairs in advance in the variable valve timing arteries and veins spectrogram
Air valve angle under the rotating speed and load of motivation needed for engine, if the water temperature of the engine shows to be currently at warming-up work
Condition then determines that 3 variable valve timing arteries and veins spectrograms can be used for calculating obtaining at least one first air valve angle at this time.For example,
The corresponding operating mode of 3 variable valve timing arteries and veins spectrograms is warming-up operating mode, idle machine operating mode, low altitude area；It is warming-up operating mode, idle
Machine operating mode, intermediate altitude；And warming-up operating mode, idle machine operating mode, High aititude, then existed respectively according to the rotating speed of the engine and load
The corresponding air valve angle of acquisition of tabling look-up in 3 variable valve timing arteries and veins spectrograms can not only be used for first air valve angle.
Next step S103 is executed, the environmental pressure residing for the engine is at least one first valve
Angle is handled, to obtain preferred air valve angle.For example, can be to obtained in the example of the step S102 described 3
First air valve angle is averaged, using this average value as the preferred air valve angle.
Step S104 is finally executed, the air valve angle of the engine, the gas are adjusted according to the preferred air valve angle
Door angle includes unlatching and/or the closing angle of the valve of the engine.Specifically, the opening angle of the valve of the engine
Degree can be understood as the opening angle of the inlet valve of the engine；The closing angle of the valve of the engine can be understood as
The closing angle of the exhaust valve of the engine.In a preference, if step S103 processing acquisitions is described preferred
Air valve angle is opening angle, then the opening angle for the inlet valve for adjusting the engine according to the preferred air valve angle is big
It is small；If the preferred air valve angle that the step S103 processing obtains is closing angle, according to the preferred air valve angle
Adjust the closing angle size of the exhaust valve of the engine.
Further, the operating mode is used to describe the operating status of the engine.Further, the engine
The combination of rotating speed and load can be used for indicating the operating mode.
Further, the variable valve timing arteries and veins spectrogram can be demarcated previously according to experimental result and be obtained, and be deposited in advance
Be stored in automobile residing for the engine engine management system (Engine Management System, abbreviation EMS) or
In electronic control unit (Electronic Control Unit, abbreviation ECU), technical side described in the embodiment of the present invention is being executed
It is directly invoked when case.Those skilled in the art can change depositing for the variable valve timing arteries and veins spectrogram according to actual needs
Storage space is set.It preferably, can also be by way of locally refreshing or remote reflash to being preset at the engine management system
In the variable valve timing arteries and veins spectrogram be updated so that the data in the variable valve timing arteries and veins spectrogram can be more
It is suitable for the current operating conditions of the automobile.
Further, rotating speed and load and the hair of the variable valve timing arteries and veins spectrogram for indicating the engine
The correspondence of the air valve angle of motivation.It will be appreciated by those skilled in the art that the variable valve timing arteries and veins spectrogram can be three-dimensional
Image, for example, the variable valve timing arteries and veins spectrogram is indicated based on three-dimensional cartesian coordinate system (being denoted as x-axis, y-axis and z-axis),
In, the x-axis of the variable valve timing arteries and veins spectrogram is used to indicate the rotating speed of the engine, the variable valve timing arteries and veins spectrogram
Y-axis be used to indicate that the load of the engine, the z-axis of the variable valve timing arteries and veins spectrogram to be then used to indicate the engine
Air valve angle (wherein, inlet valve is opening angle, and exhaust valve is closing angle).
In a change case of the present embodiment, the implementation sequence of the step S101 and step S102 can be mutual
It changes, for example, first according to the water temperature of the engine and the rotating speed and load of the engine, uses 12 kinds of changeable air valves
Timing arteries and veins spectrogram calculates at least one first air valve angle of acquisition and weeds out portion if the pedal signal corresponds to idling operation
Divide corresponding one or more first air valve angles of load；If the pedal signal corresponding part load, weeds out idling work
Corresponding one or more first air valve angles of condition.It will be appreciated by those skilled in the art that technical solution described in this change case equally may be used
To obtain at least one first air valve angle, art technology according to the water temperature of the pedal signal and the engine
Personnel can convert in practical application according to actual needs, this has no effect on the technology contents of the present invention.
By upper, the technical solution of first embodiment introduce environmental pressure as the determination air valve angle measurement factor it
One, it can better assure that the dynamic property demand of automobile when driving in high altitude localities.This is the unexistent technology of the prior art
Scheme so that the engine can be with the best air valve angle of Auto-matching in height height above sea level section, it is ensured that residing for engine
Automobile can reach Best Economy in low altitude area, and be able to maintain that the traveling of best power performance in high altitude localities
Demand.
Fig. 2 is a kind of flow chart of the variable valve timing control method of engine of the second embodiment of the present invention.Tool
Body, in the present embodiment, is first carried out step S201, according to the pedal signal of automobile residing for the engine, from preset
It selects to determine at least one variable valve timing arteries and veins spectrogram, different variable valve timing in multiple variable valve timing arteries and veins spectrograms
Arteries and veins spectrogram corresponds to different operating modes, water temperature, the pedal signal and the hair of the operating mode at least based on the engine
The combination of environmental pressure residing for motivation determines.More specifically, those skilled in the art can refer to shown in above-mentioned Fig. 1 and implement
Step S101 described in example, it will not be described here.
It executes subsequently into step S202, according to the rotating speed and load of the engine, searches respectively described at least one
Variable valve timing arteries and veins spectrogram, to obtain at least one candidate air valve angle, the quantity of at least one candidate air valve angle
It is equal at least one quantity of variable valve timing arteries and veins spectrogram.In a preference, pass through the step S101's
6 variable valve timing arteries and veins spectrograms are determined in selection, then this step is tabled look-up in 6 variable valve timing arteries and veins spectrograms respectively
Air valve angle corresponding with the rotating speed of the engine and load is obtained as the candidate air valve angle, 6 changeable air valves
Timing arteries and veins spectrogram total can obtain 6 candidate air valve angles.
Next step S203 is executed, each candidate valve angle in the multiple candidate air valve angle is determined according to the water temperature
The weight of degree.Specifically, it is tabled look-up in preset water temperature factor graph according to the water temperature, with the multiple candidate valve angle of determination
The weight of each candidate's air valve angle in degree, wherein the water temperature factor graph is for indicating that the water temperature is corresponding with the weight
Relationship corresponds to warming-up operating mode in operating mode and heat engine operating mode respectively shared ratio to describe the current water temperature of the engine.
More specifically, the water temperature factor graph is a percentage curve, and abscissa represents water temperature, and ordinate represents warming-up operating mode
With the weight coefficient of heat engine operating mode, warming-up operating mode in current working is represented when the weight coefficient is zero and accounts for 100% and heat engine
Operating mode accounts for 0%；Represent that warming-up operating mode accounts for 0% in current working when the weight coefficient is 1 and heat engine operating mode accounts for 100%.?
In one preference, the described 6 candidate air valve angles obtained in the step S202 can be respectively according to water temperature in the water
Corresponding weight is found in warm factor graph.For example, the current corresponding weight coefficient of water temperature of acquisition of tabling look-up is 0.7, then represent
Warming-up operating mode accounts for 30%, heat engine operating mode and accounts for 70% in current working, includes warm in corresponding described 6 candidate air valve angles
It is 0.7 that the weight of the candidate air valve angle of machine operating mode, which is 0.3, includes the weight of candidate air valve angle of heat engine operating mode.
It is executed subsequently into step S204, according to the weight to multiple candidate air valve angles point under identical environmental pressure
Interpolation calculation is not carried out, to obtain the first air valve angle under each environmental pressure.If for example, tabling look-up in the step S202 really
In fixed 6 candidate air valve angles, operating mode be warming-up operating mode, sub-load, intermediate altitude candidate air valve angle be that (CA is 21CA
Crank angle), operating mode be heat engine operating mode, sub-load, intermediate altitude candidate air valve angle be 11CA, and according to the step
S203 determine current working in include warming-up operating mode candidate air valve angle weight be 0.3, include heat engine operating mode
The weight of candidate air valve angle is 0.7, then first air valve angle can be based on formula (21-11) × 0.7+11 or be based on
Formula 21- (21-11) × 0.3, which is calculated, to be obtained, and the identical result of calculation of two kinds of formulas is 18CA, this is the under intermediate altitude
One air valve angle；The first air valve angle obtained under low altitude area and High aititude can also similarly be calculated.
Next step S205 is executed, the environmental pressure residing for the engine is at least one first valve
Angle is handled, to obtain preferred air valve angle.Specifically, those skilled in the art can refer to shown in above-mentioned Fig. 1 and implement
Step S103 described in example, it will not be described here.
Step S206 is finally executed, the air valve angle of the engine, the gas are adjusted according to the preferred air valve angle
Door angle includes unlatching and/or the closing angle of the valve of the engine.Specifically, those skilled in the art can refer to upper
Step S104 described in embodiment illustrated in fig. 1 is stated, it will not be described here.
Further, the water temperature factor graph can be stored in the preset variable valve timing arteries and veins spectrogram it is identical or
In different device, those skilled in the art can become according to actual needs dissolves more embodiments, and it will not be described here.
By upper, using the scheme of second embodiment, the step S202, the step S203 and the step S204 can
To be interpreted as a specific implementation mode of step S102 described in above-mentioned embodiment illustrated in fig. 1, pass through the preset water temperature factor
Figure determines in the corresponding operating mode of the current water temperature of engine warming-up operating mode and heat engine operating mode respectively proportion so that the gas
Door angle adjustment amplitude can between the warming-up operating mode and heat engine operating mode gentle transition, avoid because switch too acutely due to make
At dynamical problem, optimize user driving and by bus experience.
Fig. 3 is a kind of flow chart of the variable valve timing control method of engine of the third embodiment of the present invention.Tool
Body, in the present embodiment, is first carried out step S301, according to the pedal signal of automobile residing for the engine, from preset
It selects to determine at least one variable valve timing arteries and veins spectrogram, different variable valve timing in multiple variable valve timing arteries and veins spectrograms
Arteries and veins spectrogram corresponds to different operating modes, water temperature, the pedal signal and the hair of the operating mode at least based on the engine
The combination of environmental pressure residing for motivation determines.More specifically, those skilled in the art can refer to shown in above-mentioned Fig. 1 and implement
Step S101 described in example, it will not be described here.
It executes subsequently into step S302, according to the rotating speed and load of the engine, searches respectively described at least one
Variable valve timing arteries and veins spectrogram, to obtain at least one candidate air valve angle, the quantity of at least one candidate air valve angle
It is equal at least one quantity of variable valve timing arteries and veins spectrogram.Specifically, those skilled in the art can refer to above-mentioned
Step S202 described in embodiment illustrated in fig. 2, it will not be described here.
Next step S303 is executed, each candidate valve angle in the multiple candidate air valve angle is determined according to the water temperature
The weight of degree.Specifically, specifically, those skilled in the art can refer to step S203 described in above-mentioned embodiment illustrated in fig. 2,
It will not be described here.
It is executed subsequently into step S304, according to the weight to multiple candidate air valve angles point under identical environmental pressure
Interpolation calculation is not carried out, to obtain the first air valve angle under each environmental pressure.Specifically, those skilled in the art can join
It is admitted to and states step S204 described in embodiment illustrated in fig. 2, it will not be described here.
Next step S305 is executed, the weight of each first air valve angle is determined according to the environmental pressure.Specifically,
Select the environmental stress factors figure to match as excellent from preset multiple environmental stress factors figures according to the environmental pressure
Environmental stress factors figure, the environmental stress factors figure is selected to be used to indicate the correspondence of the environmental pressure and the weight.
Preferably, the environmental stress factors figure is similar with the water temperature factor graph, is similarly a percentage curve, abscissa generation
Table environmental pressure, ordinate represent the weight coefficient of Different Altitude.Preferably, the environmental stress factors figure according to height above sea level not
It is same to be preset as multiple environmental stress factors figures.For example, the weight coefficient of low altitude area in current working and intermediate altitude is arranged
For first environment press factors figure, low altitude area in current working is represented when the weight coefficient is zero and accounts for 100% and intermediate altitude
Account for 0%；Represent that low altitude area accounts for 0% in current working when the weight coefficient is 1 and intermediate altitude accounts for 100%.；By current working
It is set as second environment press factors figure for the weight coefficient of intermediate altitude and High aititude, represents and works as when the weight coefficient is zero
Intermediate altitude accounts for 100% in preceding operating mode and High aititude accounts for 0%；Intermediate altitude in current working is represented when the weight coefficient is 1 to account for
0% and High aititude accounts for 100%.
In a preference, the environmental pressure that is presently according to the engine is from the first environment press factors
It selects to determine the preferred ambient press factors figure in figure and the second environment press factors figure, then according to the environment
Pressure is tabled look-up in the preferred ambient press factors figure, with the weight of each first air valve angle of determination.Preferably, generally may be used
Using by 2500 meters of regions below of height above sea level as low altitude area region, can be using the region of 4000 meters of height above sea level or more as Diagnostic predictor
Domain, those skilled in the art can also adjust the critical height above sea level of the low altitude area and High aititude according to actual needs, this is not
Influence the technology contents of the present invention.
It is executed subsequently into step S306, according to the weight of each first air valve angle to described at least one first
Air valve angle carries out interpolation calculation, to obtain the preferred air valve angle.Specifically, method this field skill of the interpolation calculation
Art personnel can refer to step S204 described in above-mentioned embodiment illustrated in fig. 2, and it will not be described here.
Step S307 is finally executed, the air valve angle of the engine, the gas are adjusted according to the preferred air valve angle
Door angle includes unlatching and/or the closing angle of the valve of the engine.Specifically, those skilled in the art can refer to upper
Step S104 described in embodiment illustrated in fig. 1 is stated, it will not be described here.
By upper, using the scheme of 3rd embodiment, the step S305 and the step S306 can be understood as above-mentioned
A specific implementation of step S205 described in step S103 described in embodiment illustrated in fig. 1 or above-mentioned embodiment illustrated in fig. 2
Mode determines that engine is presently on the basis of preset water temperature factor graph by preset environmental stress factors figure
The corresponding operating mode of environmental pressure in the respective proportion of low altitude area and intermediate altitude or intermediate altitude and High aititude so that it is described
The adjustment amplitude of air valve angle can between low altitude area and High aititude gentle transition, avoid directly being switched to high sea from low altitude area
When pulling out switching too acutely and caused by dynamical problem, optimize user driving and by bus experience.
Fig. 4 is a kind of structural representation of the variable valve timing control apparatus of engine of the fourth embodiment of the present invention
Figure.It will be appreciated by those skilled in the art that the variable valve timing control apparatus 4 of engine described in the present embodiment is for implementing above-mentioned figure
1 to the method and technology scheme described in embodiment illustrated in fig. 3.Specifically, in the present embodiment, the changeable air valve of the engine
Arrangement for controlling timing 4 includes selecting module 41, for according to the pedal signal of automobile residing for the engine, from preset multiple
It selects to determine at least one variable valve timing arteries and veins spectrogram, different variable valve timing arteries and veins spectrum in variable valve timing arteries and veins spectrogram
The corresponding different operating mode of figure, water temperature, the pedal signal and the engine of the operating mode at least based on the engine
The combination of residing environmental pressure determines；Computing module 42, for according to the water temperature of the engine and the engine
Rotating speed and load are calculated using at least one variable valve timing arteries and veins spectrogram and obtain at least one first air valve angle, institute
State pair of rotating speed and load and the air valve angle of the engine of the variable valve timing arteries and veins spectrogram for indicating the engine
It should be related to；Processing module 43, for the environmental pressure residing for the engine at least one first air valve angle
It is handled, to obtain preferred air valve angle；And adjustment module 44, for adjusting the hair according to the preferred air valve angle
The air valve angle of motivation, the air valve angle include unlatching and/or the closing angle of the valve of the engine.
Further, the computing module 42 includes searching submodule 421, is used for the rotating speed according to the engine and bears
Lotus searches at least one variable valve timing arteries and veins spectrogram respectively, to obtain at least one candidate air valve angle, it is described at least
The quantity of one candidate air valve angle is equal at least one quantity of variable valve timing arteries and veins spectrogram；First determines submodule
Block 422, the weight for determining each candidate air valve angle in the multiple candidate air valve angle according to the water temperature；And first
Computational submodule 423 is used for according to the weight to multiple candidate air valve angles under identical environmental pressure respectively into row interpolation
It calculates, to obtain the first air valve angle under each environmental pressure.
Preferably, first determination sub-module 422 includes the first lookup unit 4221, is used for according to the water temperature pre-
If water temperature factor graph in table look-up, with the weight of each candidate air valve angle in the multiple candidate air valve angle of determination, the water
Warm factor graph is used to indicate the correspondence of the water temperature and the weight.
Further, the processing module 43 includes the second determination sub-module 431, for being determined according to the environmental pressure
The weight of each first air valve angle；And second computational submodule 432, for the power according to each first air valve angle
Interpolation calculation is carried out at least one first air valve angle again, to obtain the preferred air valve angle.
Preferably, second determination sub-module 431 includes selecting unit 4311, for according to the environmental pressure from pre-
If multiple environmental stress factors figures in select the environmental stress factors figure to match as preferred ambient press factors figure, it is described
Environmental stress factors figure is used to indicate the correspondence of the environmental pressure and the weight；And second lookup unit 4312,
For being tabled look-up in the preferred ambient press factors figure according to the environmental pressure, with the power of each first air valve angle of determination
Weight.
The operation principle of variable valve timing control apparatus 4 about the engine, more contents of working method, can
With the associated description referring to figs. 1 to Fig. 3, which is not described herein again.
The variable valve timing control apparatus 4 of the engine can be integrated in the automobile, for example, being integrated in described
In the electronic control unit or engine management system of automobile.The variable valve timing control apparatus 4 can be based on user
Local operation carry out data update, can also the mode based on remote reflash carry out data update, it is described to ensure to be stored in
The data in the variable valve timing arteries and veins spectrogram in variable valve timing control apparatus 4 can be more suitable for the automobile
Current operating conditions.
Fig. 5 be using the embodiment of the present invention variable valve timing control method principle logic chart, be used for by
The variable valve timing control apparatus 4 of engine shown in Fig. 4 is stated to execute the method and technology scheme described in above-mentioned Fig. 1 to Fig. 3.
Specifically, in the present embodiment, the engine can be with according to the various combination of the water temperature, pedal signal and environmental pressure
12 kinds of different operating modes are obtained, 12 kinds of operating modes correspond to 12 variable valve timing arteries and veins spectrograms respectively.12 kinds of operating modes row
It lifts as follows：Warming-up operating mode, sub-load, High aititude；Warming-up operating mode, sub-load, intermediate altitude；It is warming-up operating mode, sub-load, low
Height above sea level；Warming-up operating mode, idling operation, High aititude；Warming-up operating mode, idling operation, intermediate altitude；Warming-up operating mode, idling operation, low sea
It pulls out；Heat engine operating mode, sub-load, High aititude；Heat engine operating mode, sub-load, intermediate altitude；Heat engine operating mode, sub-load, low sea
It pulls out；Heat engine operating mode, idling operation, High aititude；Heat engine operating mode, idling operation, intermediate altitude；Heat engine operating mode, idling operation, low sea
It pulls out.
In a typical application scenarios, first according to acquisition obtain the engine residing for automobile pedal signal from
It selects to determine the 6 variable valve timing arteries and veins spectrum being consistent with current pedal signal in 12 variable valve timing arteries and veins spectrograms
Figure tables look-up in 6 variable valve timing arteries and veins spectrograms according to the rotating speed of the engine and load and obtains 6 candidate valves
Angle is (for example, following 6 kinds of operating modes corresponding air valve angle in respective variable valve timing arteries and veins spectrogram：Warming-up operating mode, part are negative
Lotus, High aititude；Warming-up operating mode, sub-load, intermediate altitude；Warming-up operating mode, sub-load, low altitude area；Heat engine operating mode, part are negative
Lotus, High aititude；Heat engine operating mode, sub-load, intermediate altitude；Heat engine operating mode, sub-load, low altitude area), according to the water temperature in institute
It states the weight coefficient determined in water temperature factor graph and interpolation calculation is carried out to 2 candidate air valve angles under identical environmental pressure, obtain
Obtain 3 the first air valve angles (low altitude area, intermediate altitude and each one of High aititude).
Then according to the environmental pressure from preset first environment press factors figure (represent environmental pressure low altitude area with
Weight in intermediate altitude) or second environment press factors figure (representing weight of the environmental pressure in intermediate altitude and High aititude)
It is middle to select suitable environmental stress factors figure as preferred ambient press factors figure, if for example, the environmental pressure is in high sea
In the height above sea level interval range pulled out, then the High aititude and the intermediate altitude are determined according to the second environment press factors figure
Respective weight, it is corresponding in conjunction with corresponding first air valve angle of intermediate altitude in 3 first air valve angles and High aititude
First air valve angle carries out interpolation calculation, you can obtains the preferred air valve angle, is based ultimately upon the preferred air valve angle
Adjust unlatching/closing angle of the valve of the engine.
In another typical application scenarios, according to the rotating speed of the water temperature and the engine and it can also bear
Lotus first tables look-up and obtains the corresponding candidate air valve angle of 12 variable valve timing arteries and veins spectrograms, then again to identical ring
Multiple candidate air valve angles under border pressure and pedal signal carry out interpolation calculation, obtain 6 the first air valve angles, then basis
The current pedal signal of automobile described in the engine is screened from 6 first air valve angles, with acquisition and automobile
3 the first air valve angles that current pedal signal is consistent.
It will be appreciated by those skilled in the art that the combined result of the operating mode cited by the present embodiment does not represent the engine
All operating mode types, those skilled in the art can become according to actual needs dissolves more embodiments, and it will not be described here.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in computer readable storage medium, to store
Medium may include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of variable valve timing control method of engine, which is characterized in that include the following steps：
According to the pedal signal of automobile residing for the engine, select to determine from preset multiple variable valve timing arteries and veins spectrograms
At least one variable valve timing arteries and veins spectrogram, different variable valve timing arteries and veins spectrograms correspond to different operating modes, and the operating mode is extremely
Few combination based on the environmental pressure residing for the water temperature of the engine, the pedal signal and the engine determines；
According to the water temperature of the engine and the rotating speed and load of the engine, just using at least one changeable air valve
When arteries and veins spectrogram calculate and obtain at least one first air valve angle, the variable valve timing arteries and veins spectrogram is for indicating the engine
Rotating speed and load and the engine air valve angle correspondence；
Environmental pressure residing for the engine handles at least one first air valve angle, preferred to obtain
Air valve angle；
The air valve angle of the engine is adjusted according to the preferred air valve angle, the air valve angle includes the engine
The unlatching of valve and/or closing angle.
2. the variable valve timing control method of engine according to claim 1, which is characterized in that started according to described
The rotating speed and load of the water temperature of machine and the engine are calculated using at least one variable valve timing arteries and veins spectrogram and are obtained
At least one first air valve angle, includes the following steps：
According to the rotating speed and load of the engine, at least one variable valve timing arteries and veins spectrogram is searched respectively, to obtain
At least one candidate's air valve angle, the quantity and at least one variable valve timing of at least one candidate air valve angle
The quantity of arteries and veins spectrogram is equal；
The weight of each candidate air valve angle in the multiple candidate air valve angle is determined according to the water temperature；
Interpolation calculation is carried out respectively to multiple candidate air valve angles under identical environmental pressure according to the weight, to obtain each
The first air valve angle under environmental pressure.
3. the variable valve timing control method of engine according to claim 2, which is characterized in that according to the water temperature
The weight for determining each candidate air valve angle in the multiple candidate air valve angle, includes the following steps：
It is tabled look-up in preset water temperature factor graph according to the water temperature, with each candidate gas in the multiple candidate air valve angle of determination
The weight of door angle, the water temperature factor graph are used to indicate the correspondence of the water temperature and the weight.
4. the variable valve timing control method of engine according to claim 1, which is characterized in that started according to described
Environmental pressure residing for machine handles at least one first air valve angle, includes the following steps：
The weight of each first air valve angle is determined according to the environmental pressure；
Interpolation calculation is carried out at least one first air valve angle according to the weight of each first air valve angle, to obtain
Obtain the preferred air valve angle.
5. the variable valve timing control method of engine according to claim 4, which is characterized in that according to the environment
Pressure determines the weight of each first air valve angle, includes the following steps：
The environmental stress factors figure to match is selected to make from preset multiple environmental stress factors figures according to the environmental pressure
For preferred ambient press factors figure, the environmental stress factors figure is closed for indicating that the environmental pressure is corresponding with the weight
System；
It is tabled look-up in the preferred ambient press factors figure according to the environmental pressure, with the power of each first air valve angle of determination
Weight.
6. a kind of variable valve timing control apparatus of engine, which is characterized in that including：
Selecting module, for the pedal signal according to automobile residing for the engine, from preset multiple variable valve timing arteries and veins
It selects to determine that at least one variable valve timing arteries and veins spectrogram, different variable valve timing arteries and veins spectrograms correspond to different works in spectrogram
Condition, the environmental pressure residing for water temperature, the pedal signal and the engine of the operating mode at least based on the engine
Combination determine；
Computing module, for according to the water temperature of the engine and the rotating speed and load of the engine, using it is described at least
One variable valve timing arteries and veins spectrogram, which calculates, obtains at least one first air valve angle, and the variable valve timing arteries and veins spectrogram is used for
Indicate the correspondence of the rotating speed and load and the air valve angle of the engine of the engine；
Processing module, for the environmental pressure residing for the engine at least one first air valve angle at
Reason, to obtain preferred air valve angle；
Adjustment module, the air valve angle for adjusting the engine according to the preferred air valve angle, the air valve angle packet
Include unlatching and/or the closing angle of the valve of the engine.
7. the variable valve timing control apparatus of engine according to claim 6, which is characterized in that the computing module
Including：
Submodule is searched, for the rotating speed and load according to the engine, is searching at least one changeable air valve respectively just
When arteries and veins spectrogram, to obtain at least one candidate air valve angle, the quantity of at least one candidate air valve angle with it is described at least
The quantity of one variable valve timing arteries and veins spectrogram is equal；
First determination sub-module, for determining each candidate air valve angle in the multiple candidate air valve angle according to the water temperature
Weight；
First computational submodule, for being carried out respectively to multiple candidate air valve angles under identical environmental pressure according to the weight
Interpolation calculation, to obtain the first air valve angle under each environmental pressure.
8. the variable valve timing control apparatus of engine according to claim 7, which is characterized in that described first determines
Submodule includes：
First lookup unit, for being tabled look-up in preset water temperature factor graph according to the water temperature, with the multiple candidate of determination
The weight of each candidate's air valve angle in air valve angle, the water temperature factor graph is for indicating that the water temperature is corresponding with the weight
Relationship.
9. the variable valve timing control apparatus of engine according to claim 6, which is characterized in that the processing module
Including：
Second determination sub-module, the weight for determining each first air valve angle according to the environmental pressure；
Second computational submodule is used for the weight according to each first air valve angle at least one first valve angle
Degree carries out interpolation calculation, to obtain the preferred air valve angle.
10. the variable valve timing control apparatus of engine according to claim 9, which is characterized in that described second really
Stator modules include：
Selecting unit, for selecting the environment to match from preset multiple environmental stress factors figures according to the environmental pressure
Press factors figure as preferred ambient press factors figure, the environmental stress factors figure for indicate the environmental pressure with it is described
The correspondence of weight；
Second lookup unit, it is each to determine for being tabled look-up in the preferred ambient press factors figure according to the environmental pressure
The weight of a first air valve angle.
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| CN201710245095.7A CN108730044B (en) | 2017-04-14 | 2017-04-14 | Variable valve timing control method and device of engine |
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| CN201710245095.7A CN108730044B (en) | 2017-04-14 | 2017-04-14 | Variable valve timing control method and device of engine |
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| CN112324578A (en) * | 2020-11-17 | 2021-02-05 | 浙江吉利控股集团有限公司 | Control method and control system for variable valve timing system of vehicle |
| CN112855356A (en) * | 2021-01-15 | 2021-05-28 | 浙江吉利控股集团有限公司 | Control method and control system for idling state of vehicle and vehicle |
| CN113357024A (en) * | 2021-06-29 | 2021-09-07 | 重庆长安汽车股份有限公司 | Control method and device for variable valve timing of engine and automobile |
| CN115199416A (en) * | 2022-07-21 | 2022-10-18 | 无锡威孚高科技集团股份有限公司 | Variable valve timing control method and control system for engine |
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| CN112324578A (en) * | 2020-11-17 | 2021-02-05 | 浙江吉利控股集团有限公司 | Control method and control system for variable valve timing system of vehicle |
| CN112855356A (en) * | 2021-01-15 | 2021-05-28 | 浙江吉利控股集团有限公司 | Control method and control system for idling state of vehicle and vehicle |
| CN113357024A (en) * | 2021-06-29 | 2021-09-07 | 重庆长安汽车股份有限公司 | Control method and device for variable valve timing of engine and automobile |
| CN113357024B (en) * | 2021-06-29 | 2022-09-06 | 重庆长安汽车股份有限公司 | Control method and device for variable valve timing of engine and automobile |
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| CN115199416B (en) * | 2022-07-21 | 2023-07-18 | 无锡威孚高科技集团股份有限公司 | Engine variable valve timing control method and control system |
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|---|---|
| CN108730044B (en) | 2020-09-29 |
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