CN109838323A - Valve control method, valve control device and vehicle - Google Patents
Valve control method, valve control device and vehicle Download PDFInfo
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- CN109838323A CN109838323A CN201711227591.6A CN201711227591A CN109838323A CN 109838323 A CN109838323 A CN 109838323A CN 201711227591 A CN201711227591 A CN 201711227591A CN 109838323 A CN109838323 A CN 109838323A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
This disclosure relates to a kind of valve control method, valve control device and vehicle.Using the valve control method, comprehensively consider the current water temperature of the engine of vehicle, the current running state of the current oil temperature of engine and vehicle, it is higher than critical water temperature in the engine current water temperature for meeting vehicle, the current oil temperature of engine is higher than critical oil temperature, and the current state of vehicle be preset state when, just control D-EGR valve opening, in other words, when the current state of vehicle and engine is suitble to using D-EGR technology, just open D-EGR valve, therefore, it can accurately it is determined whether to enable D-EGR valves with more reasonable, and then D-EGR valve is opened under suitable conditions, it avoids and opens D-EGR valve under the conditions of unsuitable and influence caused by performance and service life to engine and vehicle.
Description
Technical field
This disclosure relates to technical field of vehicle, and in particular, to a kind of valve control method, valve control device and vehicle
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Background technique
The sustainable development of national economy needs good environment, and mentions with the development of science and technology with human living standard
Height generates many toxic, harmful emissions so that the increase of car ownership, people are more and more frequent to the use of automobile,
Cause environmental pollution more serious, meanwhile, it will also result in energy crisis.Therefore, country's discharge and oil consumption standard requirements are further
Reduce vehicle exhaust discharge quantity.
In order to reduce vehicle exhaust discharge quantity, EGR (Exhaust Gas Recirculation；Exhaust gas recirculatioon) technology
It comes into being, which is that a part (mainly nitrogen oxides) that gas is discharged is isolated and led after combustion by internal combustion engine
Enter the technology that air inlet side makes it burn once again, therefore, the nitrogen oxides in discharge gas can be reduced using EGR technology, in turn
Reduce vehicle exhaust discharge quantity.
Summary of the invention
Purpose of this disclosure is to provide a kind of valve control method, valve control device and vehicles, to be more accurately controlled
D-EGR valve opening.
To achieve the goals above, embodiment of the present disclosure first aspect provides a kind of valve control method, comprising:
Obtain engine current water temperature, the current oil temperature of engine of the vehicle and the working as the vehicle of vehicle
Preceding state；
Whether the engine current water temperature of detection vehicle is higher than critical water temperature, and the current machine of the engine for detecting the vehicle
Whether oil temperature is higher than critical oil temperature；
It is higher than the critical water temperature, and the current machine oil of engine of the vehicle in the engine current water temperature of the vehicle
In the case that temperature is higher than the critical oil temperature, and the current state of the vehicle is preset state, control dedicated useless
Gas recycles D-EGR valve opening.
Optionally, the method also includes:
According to the current environmental temperature of the vehicle, preset critical water temperature curve is inquired, with the determination critical water temperature,
Wherein, the critical water temperature curve is used to indicate starting for the suitable unlatching D-EGR valve corresponding to varying environment temperature
Machine water temperature；
According to the current environmental temperature of the vehicle, preset critical oil temperature curve is inquired, it is described critical with determination
Oil temperature, wherein the critical oil temperature curve is used to indicate the suitable unlatching D- corresponding to varying environment temperature
The engine motor oil temperature of EGR valve.
Optionally, the method also includes:
According to the change rate of the engine throttle pedal of the vehicle, the current state of the vehicle, the vehicle are determined
Current state be anxious accelerations, emergency braking, deceleration and class any one of at the uniform velocity, wherein the preset state is including subtracting
Speed or class are at the uniform velocity.
Optionally, dedicated exhaust gas recycling D-EGR valve opening is controlled, comprising:
Determine valve regulated speed corresponding with the current state of the vehicle；
The D-EGR valve is opened according to identified valve regulated speed.
Optionally, dedicated exhaust gas recycling D-EGR valve opening is controlled, comprising:
Determine valve regulated speed corresponding with the current state of the vehicle；
According to the current environmental temperature of the vehicle and the engine current water temperature, it is bent to inquire preset water temperature amendment
Line, to determine current water temperature modifying factor, wherein the water temperature fair curve show environment temperature and engine water temperature with
Mapping relations between water temperature modifying factor；
According to the current environmental temperature of the vehicle and the current oil temperature of the engine, preset oil temperature is inquired
Fair curve, with the current oil temperature modifying factor of determination, wherein the oil temperature fair curve show environment temperature with
And the mapping relations between engine motor oil temperature and oil temperature modifying factor；
According to the current water temperature modifying factor and the current oil temperature modifying factor, to identified valve tune
Section speed is modified；
The D-EGR valve is opened according to revised valve regulated speed.
Embodiment of the present disclosure second aspect provides a kind of valve control device, comprising:
Module is obtained, is configured as obtaining the current machine oil temperature of engine of the engine current water temperature of vehicle, the vehicle
The current state of degree and the vehicle；
Whether detection module, the engine current water temperature for being configured as detection vehicle are higher than critical water temperature, and described in detection
Whether the current oil temperature of the engine of vehicle is higher than critical oil temperature；
Control module is configured as being higher than the critical water temperature, and the vehicle in the engine current water temperature of the vehicle
The current oil temperature of engine be higher than the critical oil temperature, and the current state of the vehicle is preset state
In the case of, control dedicated exhaust gas recycling D-EGR valve opening.
Optionally, the valve control device further include:
First determining module is configured as the current environmental temperature according to the vehicle, and it is bent to inquire preset critical water temperature
Line, with the determination critical water temperature, wherein the critical water temperature curve is used to indicate suitable corresponding to varying environment temperature open
Open the engine water temperature of the D-EGR valve；
Second determining module is configured as the current environmental temperature according to the vehicle, inquires preset critical machine oil temperature
It writes music line, with the determination critical oil temperature, wherein the critical oil temperature curve is used to indicate varying environment temperature institute
The corresponding suitable engine motor oil temperature for opening the D-EGR valve.
Optionally, the valve control device further include:
Third determining module is configured as the change rate of the engine throttle pedal according to the vehicle, determines the vehicle
Current state, the current state of the vehicle be anxious acceleration, emergency braking, deceleration and class any one of at the uniform velocity,
In, the preset state include slow down or class at the uniform velocity.
Optionally, the control module includes:
First determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
First control submodule is configured as opening the D-EGR valve according to identified valve regulated speed.
Optionally, the control module includes:
Second determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
Third determines submodule, is configured as current environmental temperature and the current water of the engine according to the vehicle
Temperature inquires preset water temperature fair curve, to determine current water temperature modifying factor, wherein the water temperature fair curve is shown
Mapping relations between environment temperature and engine water temperature and water temperature modifying factor；
4th determines submodule, is configured as the current environmental temperature and the current machine oil of the engine according to the vehicle
Temperature inquires preset oil temperature fair curve, with the current oil temperature modifying factor of determination, wherein the oil temperature
Fair curve shows the mapping relations between environment temperature and engine motor oil temperature and oil temperature modifying factor；
Submodule is corrected, is configured as according to the current water temperature modifying factor and the current oil temperature modifying factor
Son is modified identified valve regulated speed；
Second control submodule is configured as opening the D-EGR valve according to revised valve regulated speed.
The embodiment of the present disclosure third aspect provides a kind of vehicle, comprising: dedicated exhaust gas recycling D-EGR valve and this public affairs
The valve control device of embodiment second aspect offer is provided.
By adopting the above technical scheme, comprehensively consider the current oil temperature of the current water temperature of the engine of vehicle, engine
And the current running state of vehicle, it is higher than critical water temperature, the current machine oil of engine in the engine current water temperature for meeting vehicle
Temperature be higher than critical oil temperature, and the current state of vehicle be preset state when, just control D-EGR valve opening, that is to say
It says, when the current state of vehicle and engine is suitble to using D-EGR technology, just opening D-EGR valve therefore can be more
Rationally accurately it is determined whether to enable D-EGR valves, and then open D-EGR valve under suitable conditions, avoid in discomfort
Open D-EGR valve under conditions of conjunction and influence caused by performance and service life to engine and vehicle.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is a kind of flow chart for valve control method that the embodiment of the present disclosure provides.
Fig. 2 is a kind of another flow chart for valve control method that the embodiment of the present disclosure provides.
Fig. 3 is that dedicated exhaust gas recycling is controlled during a kind of valve control method that the embodiment of the present disclosure provides includes the steps that
The flow chart of D-EGR valve opening.
Fig. 4 is that dedicated exhaust gas recycling is controlled during a kind of valve control method that the embodiment of the present disclosure provides includes the steps that
Another flow chart of D-EGR valve opening.
Fig. 5 is a kind of block diagram for valve control device that the embodiment of the present disclosure provides.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
D-EGR(Dedicated-Exhaust Gas Recirculation；The recycling of dedicated exhaust gas) technology is EGR skill
The upgrading of art.In D-EGR technology, by controlling the opening and closing of D-EGR valve, to control nitrogen oxides in discharge gas
Whether need to be again introduced into combustion chamber and burn, wherein D-EGR valve is arranged in engine based on D-EGR technology
Valve.However, opening D-EGR valve under the conditions of inappropriate if D-EGR technology improper use, will cause engine
Interior carbon distribution, the coking in air inlet side, combustion chamber have suction-operated to in-engine gasoline, seriously affect engine and vehicle
Performance and service life.
In order to ensure D-EGR technology use to engine and vehicle bring beneficial effect, exclude negative effect, this public affairs
It opens embodiment and a kind of valve control method is provided, opened under suitable conditions to control D-EGR valve.
D-EGR valve is located between the exhaust system and gas handling system of engine interior, the opening and closing of D-EGR valve
The exhaust gas that can be distributed in exhaust gas cylinder flows into the ratio of exhaust system and gas handling system, to meet the needs of vehicle.Illustratively, when
When opening heating in vehicle, D-EGR valve can control to close, prevent exhaust gas recirculation into gas handling system, makes useless in exhaust gas cylinder
Gas fully flows into exhaust system, provides heat for vehicle；When according to vehicle demand, from the external practical sky for flowing into gas handling system
When tolerance is not able to satisfy engine demand air capacity, it can control D-EGR valve opening, flow into a part of exhaust gas in exhaust gas cylinder
Into gas handling system, and the amount of actual air for combustion of inflow gas handling system meets engine demand air capacity together.
Referring to FIG. 1, Fig. 1 is a kind of flow chart for valve control method that the embodiment of the present disclosure provides.As shown in Figure 1,
Method includes the following steps:
Step S11: the engine current water temperature of vehicle, the current oil temperature of engine of the vehicle and described are obtained
The current state of vehicle；
Step S12: whether the engine current water temperature for detecting vehicle is higher than critical water temperature, and detects starting for the vehicle
Whether the current oil temperature of machine is higher than critical oil temperature；
Step S13: it is higher than the critical water temperature, and the engine of the vehicle in the engine current water temperature of the vehicle
In the case that current oil temperature is higher than the critical oil temperature, and the current state of the vehicle is preset state, control
Make dedicated exhaust gas recycling D-EGR valve opening.
It will affect the performance and service life of engine and vehicle due to opening D-EGR valve under the conditions of inappropriate,
Therefore, before opening D-EGR valve, need to detect the current state of vehicle if appropriate for unlatching D-EGR valve.Firstly, control
The temperature sensor detection engine current water temperature and the current oil temperature of engine of device control installation processed in the car, and
Obtain engine current water temperature and the current oil temperature of engine detected by temperature sensor.Meanwhile according to it is current when
The state that driver operates pedal of vehicles is carved, the current state of the vehicle is obtained.Wherein, engine current water temperature refers to real-time survey
The temperature of cooling water, the current oil temperature of engine refer to the temperature of the engine inner engine oil measured in real time in the engine obtained,
The current state of vehicle is the real-time driving status of vehicle.
Under normal conditions, when engine current water temperature, the current oil temperature of engine are lower, engine ignition fuel compared with
For difficulty, engine power is caused to decline, at this point, being flowed into a part of exhaust gas in exhaust gas cylinder if opening D-EGR valve
In gas handling system, the influence caused by engine and vehicle performance in engine of more carbon accumulation will cause, therefore, at this
In open embodiment, it is thus necessary to determine that critical water temperature, critical oil temperature, the critical water temperature to characterize only in engine it is current
Water temperature is possible to open D-EGR valve when being greater than the critical water temperature, and the critical oil temperature is to characterize only in engine
Current oil temperature is possible to open D-EGR valve when being greater than the critical oil temperature.
Optionally, referring to FIG. 2, Fig. 2 is a kind of another flow chart for valve control method that the embodiment of the present disclosure provides.
As shown in Fig. 2, this method is further comprising the steps of:
Step S14: according to the current environmental temperature of the vehicle, preset critical water temperature curve is inquired, described in determination
Critical water temperature, wherein the critical water temperature curve is used to indicate the suitable unlatching D-EGR valve corresponding to varying environment temperature
The engine water temperature of door；
Step S15: according to the current environmental temperature of the vehicle, preset critical oil temperature curve is inquired, with determination
The critical oil temperature, wherein the critical oil temperature curve is used to indicate suitable corresponding to varying environment temperature open
Open the engine motor oil temperature of the D-EGR valve.
In the embodiments of the present disclosure, the current environmental temperature of vehicle refers to the vehicle measured using environment temperature sensor
Environment nowadays temperature, it is generally the case that the ambient temperature of vehicle is different, is suitble to the water temperature of engine behavior
Not identical, in turn, it is also not identical that control D-EGR valve is possible to the critical water temperature opened.Therefore, critical water temperature is not one
Fixed numerical value, changes with the variation of the current environmental temperature of vehicle, and the current environmental temperature of vehicle is lower, corresponding
It is suitble to the critical water temperature for opening D-EGR valve higher.
In order to guarantee in the critical water temperature that current time determines, with the current environmental temperature of vehicle and in this prior ring
D-EGR valve opening and the situation of closing match at a temperature of border, need to preset a critical water temperature curve, the critical water temperature curve
It is used to indicate the engine water temperature of suitable unlatching D-EGR valve corresponding to varying environment temperature, in the critical water temperature curve
In reference axis, abscissa represents the current environmental temperature of vehicle, and ordinate represents water temperature.Wherein, the preset critical water temperature is bent
Line is to be obtained before using the engine by many experiments measurement.In addition, different types of engine, even if vehicle
Current environmental temperature it is identical, critical water temperature is also different.Therefore, different types of engine is required to before the use
The critical water temperature curve for corresponding to the engine is obtained by experiment, it, can be according to the current of vehicle in order in use
Environment temperature inquires the critical water temperature curve, and then determines suitable unlatching corresponding to the current environmental temperature with the vehicle
The critical water temperature of D-EGR valve.
Likewise, needing to obtain one to engine progress many experiments measurement to preset before using the engine
Critical oil temperature curve, wherein the critical oil temperature curve is used to indicate suitable corresponding to varying environment temperature open
The engine motor oil temperature for opening D-EGR valve, in the reference axis of the critical oil temperature curve, abscissa represents working as vehicle
Preceding environment temperature, ordinate represent oil temperature.Similarly, the current environmental temperature of vehicle is lower, corresponding suitable unlatching D-
The critical oil temperature of EGR valve is also higher.
After the critical water temperature and critical oil temperature for determining the engine corresponding to the vehicle, then, step is executed
Rapid S12 compares the engine current water temperature obtained in step S11 with critical water temperature, and whether detection engine current water temperature
It compares higher than critical water temperature, and by the current oil temperature of engine with critical oil temperature, detects the current machine oil temperature of engine
Whether degree is higher than critical oil temperature.
Optionally, as shown in Fig. 2, this method is further comprising the steps of:
Step S16 determines the current state of the vehicle according to the change rate of the engine throttle pedal of the vehicle,
The current state of the vehicle be anxious acceleration, emergency braking, deceleration and class any one of at the uniform velocity, wherein the default shape
State include slow down or class at the uniform velocity.
In the embodiments of the present disclosure, the real-time driving status of vehicle can be even for anxious acceleration, emergency braking, deceleration and class
Any one of speed, this four kinds of states are mutually exclusive in synchronization.When vehicle is in different conditions, the power size that needs
Difference, and then the air capacity of demand is also different in engine aspirating system, specifically, the state suddenly accelerated is in vehicle
In, the air capacity of demand rapidly increases in engine aspirating system, at this point, if opening D-EGR valve can make in exhaust gas cylinder
Exhaust gas flows into gas handling system, causes gas flow rising in gas handling system to slow down, the speed of vehicle cannot be made rapidly to increase, shadow
The performance accelerated is rung, therefore, is not suitable for opening D-EGR valve in this state；When vehicle is in the state of emergency braking, hair
The air capacity of demand is rapidly reduced in motivation gas handling system, at this point, if the gas in gas handling system can be made by opening D-EGR valve
Amount is reduced relatively slow, causes the decline of braking efficiency, is also not suitable for opening D-EGR valve；Vehicle be in moderating process with
And class at the uniform velocity during, D-EGR valve can be opened, for reducing engine consumption.When vehicle is in deceleration regime, start
Machine torque is gradually reduced, rather than suddenly stop oil spout and caused by engine towing astern state；Class at the uniform velocity shape is in vehicle
When state, refer to that low speed fluctuates in a certain range for engine speed and torque, vehicle drives at a constant speed substantially.
Therefore, the preset state of a vehicle is set in the embodiments of the present disclosure, which can open for characterizing
The driving status of the vehicle of D-EGR valve is opened, including is slowed down with class at the uniform velocity.
Finally, executing step S13, it is higher than critical water temperature in the engine current water temperature of vehicle, and the engine of vehicle is worked as
When preceding oil temperature is higher than critical oil temperature, according to the state of pedal, whether the current state for detecting vehicle is preset state,
When in the case where the current state of vehicle being preset state, controller controls dedicated exhaust gas and recycles D-EGR valve opening.
In the valve control method that the embodiment of the present disclosure provides, before controlling D-EGR valve opening, judge current
The state of engine and vehicle is if appropriate for unlatching D-EGR valve, the unlatching when the state of engine and vehicle is suitable for
Otherwise D-EGR valve is not turned on D-EGR valve.Specifically, firstly, obtaining vehicle using the temperature sensor being installed on vehicle
Engine current water temperature, vehicle the current oil temperature of engine, and according to the state of pedal obtain vehicle it is current
Whether state, then, detection engine current water temperature are higher than critical water temperature, and whether the current oil temperature of the engine of vehicle is higher than
Critical oil temperature, finally, the engine current water temperature in vehicle is higher than the critical water temperature, and the current machine of engine of vehicle
In the case that oil temperature is higher than critical oil temperature, and the current state of vehicle is preset state, controls dedicated exhaust gas and follow again
Ring D-EGR valve opening.
Therefore, by adopting the above technical scheme, comprehensively consider the current machine oil of the current water temperature of the engine of vehicle, engine
It is current to be higher than critical water temperature, engine in the engine current water temperature for meeting vehicle for the current running state of temperature and vehicle
Oil temperature be higher than critical oil temperature, and the current state of vehicle be preset state when, just control D-EGR valve opening,
I other words when the current state of vehicle and engine is suitble to using D-EGR technology, D-EGR valve is just opened, it therefore, can be with
More reasonable accurately it is determined whether to enable D-EGR valves, and then open D-EGR valve under suitable conditions, avoid
Open D-EGR valve under the conditions of unsuitable and influence caused by performance and service life to engine and vehicle.
Optionally, referring to FIG. 3, Fig. 3 is during a kind of valve control method that the embodiment of the present disclosure provides includes the steps that
Control the flow chart of dedicated exhaust gas recycling D-EGR valve opening.As shown in figure 3, step S13 specifically includes the following steps:
Step S131: valve regulated speed corresponding with the current state of the vehicle is determined；
Step S132: the D-EGR valve is opened according to identified valve regulated speed.
When the driving status difference of vehicle, the required air capacity of engine is also different, the speed that control valve is opened
It is not identical, illustratively, when vehicle is in class and drives at a constant speed state, since engine speed and torque are low in a certain range
Speed fluctuation, at this point, the air capacity of engine demand also fluctuates in a certain range accordingly, if engine speed and torque
Fluctuation range it is smaller, then the fluctuation range of the air capacity of demand is also smaller, therefore, when opening the valve, the adjusting of valve speed
It spends also smaller；When vehicle is in deceleration regime, engine torque is gradually reduced, and the air capacity of demand is also gradually reduced, if
Detect that driver is slowed down comparatively fast, then the adjustment speed of valve is larger, slower, the adjustment speed of valve if driver is slowed down
It is smaller.
Under normal conditions, if the speed of valve opening and the current state of vehicle mismatch, by being flowed into exhaust gas cylinder
The exhausted air quantity of gas handling system is unsatisfactory for the demand air capacity of engine, will affect the ride comfort of engine operation, driver is in vehicle
It inside may feel that shake, influence the driving experience of driver.
Therefore, in the embodiments of the present disclosure, when determination can open D-EGR valve, the current shape according to vehicle is needed
State determines corresponding valve regulated speed, then, according to the unlatching of the valve regulated speed control D-EGR valve, adopts
With above-mentioned technical proposal, the speed of D-EGR valve opening can be determined, and according to the adjustment speed according to the current state of vehicle
D-EGR valve is opened, keeps the exhaust gas flowed into gas handling system consistent with the air capacity of engine demand, ensure that hair
The ride comfort of motivation.
Optionally, as shown in figure 4, Fig. 4 is during a kind of valve control method that the embodiment of the present disclosure provides includes the steps that
Control another flow chart of dedicated exhaust gas recycling D-EGR valve opening.As shown in figure 4, controlling dedicated exhaust gas recycling D-EGR
Valve opening, comprising the following steps:
Step S133: valve regulated speed corresponding with the current state of the vehicle is determined；
Step S134: according to the current environmental temperature of the vehicle and the engine current water temperature, preset water is inquired
Warm fair curve, to determine current water temperature modifying factor, wherein the water temperature fair curve shows environment temperature and starts
Mapping relations between machine water temperature and water temperature modifying factor；
Step S135: according to the current environmental temperature of the vehicle and the current oil temperature of the engine, inquiry is default
Oil temperature fair curve, with the current oil temperature modifying factor of determination, wherein the oil temperature fair curve is shown
Mapping relations between environment temperature and engine motor oil temperature and oil temperature modifying factor；
Step S136: according to the current water temperature modifying factor and the current oil temperature modifying factor, to really
Fixed valve regulated speed is modified；
Step S137: the D-EGR valve is opened according to revised valve regulated speed.
In the embodiments of the present disclosure, water temperature fair curve includes a plurality of curve, is before using engine, by multiple
Experiment measurement obtains, where reference axis in, abscissa is engine water temperature, and ordinate is water temperature modifying factor, different
Curve indicate different environment temperatures, thus, water temperature fair curve shows environment temperature and engine water temperature and water temperature
Mapping relations between modifying factor.Firstly, according to the current environmental temperature of vehicle, a plurality of song that includes from water temperature fair curve
Curve corresponding with current environmental temperature is inquired in line, then, further according to engine current water temperature, inquiry and current environment temperature
Corresponding curve is spent, can determine current water temperature modifying factor, current water temperature modifying factor is to indicate in current environmental temperature
Under, influence size of the present engine water temperature to valve regulated speed.
Likewise, oil temperature fair curve includes a plurality of curve, and before using engine, pass through many experiments
Measurement obtains, where reference axis in, abscissa is engine motor oil temperature, and ordinate is oil temperature modifying factor,
Different curves indicates different environment temperatures, thus, oil temperature fair curve shows environment temperature and engine machine
Mapping relations between oil temperature and oil temperature modifying factor.Firstly, according to the current environmental temperature of vehicle, from oil temperature
Curve corresponding with current environmental temperature is inquired in a plurality of curve that fair curve includes, it is then, current further according to engine
Oil temperature inquires curve corresponding with current environmental temperature, can determine current oil temperature modifying factor, current machine oil temperature
Modifying factor is spent to indicate under current environmental temperature, and influence of the present engine oil temperature to valve regulated speed is big
It is small.
After the corresponding valve regulated speed of current state for determining vehicle, according to the current environmental temperature of vehicle, hair
Motivation current water temperature and water temperature fair curve, determine engine current water temperature modifying factor, work as front ring further according to vehicle
The current oil temperature of border temperature, engine and oil temperature fair curve are determined current oil temperature modifying factor, are connect
, according to current water temperature modifying factor and current oil temperature modifying factor, identified valve regulated speed is repaired
Just, specifically, by valve regulated speed corresponding to the current state of determining vehicle and the current water temperature modifying factor, current
Oil temperature modifying factor does product, obtains revised valve regulated speed, finally, according to the revised valve regulated speed
Degree opens D-EGR valve.
In the embodiments of the present disclosure, it is contemplated that the current environmental temperature and engine current water temperature of vehicle are to valve regulated speed
The influence of degree, default water temperature fair curve inquire the curve according to the current environmental temperature of vehicle and engine current water temperature,
Determine current water temperature modifying factor, simultaneously, it is also considered that vehicle the current oil temperature of current environmental temperature and engine to valve
The influence of door adjustment speed, presets oil temperature fair curve, according to the current environmental temperature of vehicle and the current machine oil of engine
Temperature inquires the curve, determines current oil temperature modifying factor, and current water temperature modifying factor, current oil temperature are repaired
Positive divisor is multiplied with valve regulated speed, obtains revised valve regulated speed, and then according to the revised valve regulated
Speed opens D-EGR valve, therefore, by adopting the above technical scheme, while guaranteeing reasonably Open valve, according to engine
And the state of vehicle, determine more accurate valve regulated speed, the unlatching of better control valve.
Based on the same inventive concept, the embodiment of the present disclosure additionally provides a kind of valve control device.As shown in figure 5, Fig. 5 is
A kind of block diagram for valve control device that the embodiment of the present disclosure provides.Valve control device 500 includes:
Module 501 is obtained, is configured as obtaining the current machine oil of engine of the engine current water temperature of vehicle, the vehicle
The current state of temperature and the vehicle；
Detection module 502, whether the engine current water temperature for being configured as detection vehicle is higher than critical water temperature, and detects institute
Whether the current oil temperature of engine for stating vehicle is higher than critical oil temperature；
Control module 503 is configured as being higher than the critical water temperature in the engine current water temperature of the vehicle, and described
The current oil temperature of the engine of vehicle is higher than the critical oil temperature, and the current state of the vehicle is preset state
In the case where, control dedicated exhaust gas recycling D-EGR valve opening.
Optionally, the valve control device further include:
First determining module is configured as the current environmental temperature according to the vehicle, and it is bent to inquire preset critical water temperature
Line, with the determination critical water temperature, wherein the critical water temperature curve is used to indicate suitable corresponding to varying environment temperature open
Open the engine water temperature of the D-EGR valve；
Second determining module is configured as the current environmental temperature according to the vehicle, inquires preset critical machine oil temperature
It writes music line, with the determination critical oil temperature, wherein the critical oil temperature curve is used to indicate varying environment temperature institute
The corresponding suitable engine motor oil temperature for opening the D-EGR valve.
Optionally, the valve control device further include:
Third determining module is configured as the change rate of the engine throttle pedal according to the vehicle, determines the vehicle
Current state, the current state of the vehicle be anxious acceleration, emergency braking, deceleration and class any one of at the uniform velocity,
In, the preset state include slow down or class at the uniform velocity.
Optionally, the control module includes:
First determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
First control submodule is configured as opening the D-EGR valve according to identified valve regulated speed.
Optionally, the control module includes:
Second determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
Third determines submodule, is configured as current environmental temperature and the current water of the engine according to the vehicle
Temperature inquires preset water temperature fair curve, to determine current water temperature modifying factor, wherein the water temperature fair curve is shown
Mapping relations between environment temperature and engine water temperature and water temperature modifying factor；
4th determines submodule, is configured as the current environmental temperature and the current machine oil of the engine according to the vehicle
Temperature inquires preset oil temperature fair curve, with the current oil temperature modifying factor of determination, wherein the oil temperature
Fair curve shows the mapping relations between environment temperature and engine motor oil temperature and oil temperature modifying factor；
Submodule is corrected, is configured as according to the current water temperature modifying factor and the current oil temperature modifying factor
Son is modified identified valve regulated speed；
Second control submodule is configured as opening the D-EGR valve according to revised valve regulated speed.
Based on the same inventive concept, the embodiment of the present disclosure additionally provides a kind of vehicle, comprising: dedicated exhaust gas recycles D-
The valve control device that EGR valve and the embodiment of the present disclosure provide.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of valve control method characterized by comprising
Obtain engine current water temperature, the current oil temperature of engine of the vehicle and the current shape of the vehicle of vehicle
State；
Whether the engine current water temperature of detection vehicle is higher than critical water temperature, and the current machine oil temperature of the engine for detecting the vehicle
Whether degree is higher than critical oil temperature；
It is higher than the critical water temperature, and the current oil temperature of engine of the vehicle in the engine current water temperature of the vehicle
Higher than the critical oil temperature, and in the case that the current state of the vehicle is preset state, dedicated exhaust gas is controlled again
Recycle D-EGR valve opening.
2. valve control method according to claim 1, which is characterized in that the method also includes:
According to the current environmental temperature of the vehicle, preset critical water temperature curve is inquired, with the determination critical water temperature,
In, the critical water temperature curve is used to indicate the engine of the suitable unlatching D-EGR valve corresponding to varying environment temperature
Water temperature；
According to the current environmental temperature of the vehicle, preset critical oil temperature curve is inquired, with the determination critical machine oil
Temperature, wherein the critical oil temperature curve is used to indicate the suitable unlatching D-EGR valve corresponding to varying environment temperature
The engine motor oil temperature of door.
3. valve control method according to claim 1, which is characterized in that the method also includes:
According to the change rate of the engine throttle pedal of the vehicle, the current state of the vehicle is determined, the vehicle is worked as
Preceding state be anxious accelerations, emergency braking, deceleration and class any one of at the uniform velocity, wherein the preset state include deceleration or
Class is at the uniform velocity.
4. valve control method according to claim 1, which is characterized in that control dedicated exhaust gas recycling D-EGR valve
It opens, comprising:
Determine valve regulated speed corresponding with the current state of the vehicle；
The D-EGR valve is opened according to identified valve regulated speed.
5. valve control method according to claim 1, which is characterized in that control dedicated exhaust gas recycling D-EGR valve
It opens, comprising:
Determine valve regulated speed corresponding with the current state of the vehicle；
According to the current environmental temperature of the vehicle and the engine current water temperature, preset water temperature fair curve is inquired, with
Determine current water temperature modifying factor, wherein the water temperature fair curve shows environment temperature and engine water temperature and water temperature
Mapping relations between modifying factor；
According to the current environmental temperature of the vehicle and the current oil temperature of the engine, preset oil temperature amendment is inquired
Curve, with the current oil temperature modifying factor of determination, wherein the oil temperature fair curve shows environment temperature and hair
Mapping relations between motivation oil temperature and oil temperature modifying factor；
According to the current water temperature modifying factor and the current oil temperature modifying factor, to identified valve regulated speed
Degree is modified；
The D-EGR valve is opened according to revised valve regulated speed.
6. a kind of valve control device characterized by comprising
Obtain module, be configured as obtaining the engine current water temperature of vehicle, the vehicle the current oil temperature of engine with
And the current state of the vehicle；
Detection module, whether the engine current water temperature for being configured as detection vehicle is higher than critical water temperature, and detects the vehicle
The current oil temperature of engine whether be higher than critical oil temperature；
Control module is configured as being higher than the critical water temperature, and the vehicle in the engine current water temperature of the vehicle
The case where current oil temperature of engine is higher than the critical oil temperature, and the current state of the vehicle is preset state
Under, control dedicated exhaust gas recycling D-EGR valve opening.
7. valve control device according to claim 6, which is characterized in that the valve control device further include:
First determining module is configured as the current environmental temperature according to the vehicle, inquires preset critical water temperature curve, with
Determine the critical water temperature, wherein the critical water temperature curve is used to indicate suitable unlatching institute corresponding to varying environment temperature
State the engine water temperature of D-EGR valve；
Second determining module is configured as the current environmental temperature according to the vehicle, and it is bent to inquire preset critical oil temperature
Line, with the determination critical oil temperature, wherein the critical oil temperature curve is used to indicate corresponding to varying environment temperature
The suitable unlatching D-EGR valve engine motor oil temperature；
Third determining module is configured as the change rate of the engine throttle pedal according to the vehicle, determines the vehicle
Current state, the current state of the vehicle be anxious acceleration, emergency braking, deceleration and class any one of at the uniform velocity, wherein institute
State preset state include slow down or class at the uniform velocity.
8. valve control device according to claim 6, which is characterized in that the control module includes:
First determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
First control submodule is configured as opening the D-EGR valve according to identified valve regulated speed.
9. valve control device according to claim 6, which is characterized in that the control module includes:
Second determines submodule, is configured to determine that valve regulated speed corresponding with the current state of the vehicle；
Third determines submodule, is configured as current environmental temperature and the engine current water temperature according to the vehicle, looks into
Preset water temperature fair curve is ask, to determine current water temperature modifying factor, wherein the water temperature fair curve shows environment temperature
Degree and the mapping relations between engine water temperature and water temperature modifying factor；
4th determines submodule, is configured as according to the current environmental temperature of the vehicle and the current machine oil temperature of the engine
Degree, inquires preset oil temperature fair curve, with the current oil temperature modifying factor of determination, wherein the oil temperature is repaired
Positive curve shows the mapping relations between environment temperature and engine motor oil temperature and oil temperature modifying factor；
Submodule is corrected, is configured as according to the current water temperature modifying factor and the current oil temperature modifying factor,
Identified valve regulated speed is modified；
Second control submodule is configured as opening the D-EGR valve according to revised valve regulated speed.
10. a kind of vehicle characterized by comprising
Dedicated exhaust gas recycling D-EGR valve and valve control device as claim in any one of claims 6-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711227591.6A CN109838323B (en) | 2017-11-29 | 2017-11-29 | Valve control method, valve control device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711227591.6A CN109838323B (en) | 2017-11-29 | 2017-11-29 | Valve control method, valve control device and vehicle |
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| CN109838323B CN109838323B (en) | 2020-12-25 |
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| CN111577488A (en) * | 2020-04-17 | 2020-08-25 | 东风商用车有限公司 | Multi-mode EGR control strategy |
| CN111734520A (en) * | 2020-06-24 | 2020-10-02 | 中国第一汽车股份有限公司 | Piston cooling nozzle control method and system after engine shutdown and vehicle |
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| CN111577488B (en) * | 2020-04-17 | 2022-03-18 | 东风商用车有限公司 | Multi-mode EGR control strategy |
| CN111734520A (en) * | 2020-06-24 | 2020-10-02 | 中国第一汽车股份有限公司 | Piston cooling nozzle control method and system after engine shutdown and vehicle |
| CN111734520B (en) * | 2020-06-24 | 2021-07-20 | 中国第一汽车股份有限公司 | Piston cooling nozzle control method and system after engine shutdown and vehicle |
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| Publication number | Publication date |
|---|---|
| CN109838323B (en) | 2020-12-25 |
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