CN108394268A - Function-based continuous exhaust valve control - Google Patents
Function-based continuous exhaust valve control Download PDFInfo
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- CN108394268A CN108394268A CN201810112057.9A CN201810112057A CN108394268A CN 108394268 A CN108394268 A CN 108394268A CN 201810112057 A CN201810112057 A CN 201810112057A CN 108394268 A CN108394268 A CN 108394268A
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- motor torque
- bleed valves
- variable bleed
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- 230000004044 response Effects 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims description 49
- 230000001133 acceleration Effects 0.000 claims description 11
- 230000000740 bleeding effect Effects 0.000 claims description 11
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- 230000006870 function Effects 0.000 description 46
- 238000000034 method Methods 0.000 description 13
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- 230000001965 increasing effect Effects 0.000 description 4
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- 238000012545 processing Methods 0.000 description 3
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- 230000015654 memory Effects 0.000 description 2
- 241001417516 Haemulidae Species 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/168—Silencing apparatus characterised by method of silencing by using movable parts for controlling or modifying silencing characteristics only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Exhaust Silencers (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
A system for controlling exhaust noise in a vehicle includes a variable exhaust valve for an exhaust system and an exhaust valve controller operatively connected to the variable exhaust valve. The exhaust valve controller is configured to retrieve two or more control conditions and determine an operational intent based on the two or more control conditions. The exhaust valve controller is configured to generate a control signal based on the operational intent and the two or more control conditions, and transmit the control signal to the variable exhaust valve. The control signal varies an exhaust valve position of the variable exhaust valve. The exhaust valve position is configured to produce an exhaust noise response associated with the operational intent.
Description
Technical field
This disclosure relates to which air bleeding valve controls, and relate more specifically to a kind of continuous exhaust pneumatic wallop valve control based on function.
Background technology
The engine that vehicle exhaust system can undergo peak loudness during such as certain events such as startup, acceleration and shift is made an uproar
Sound.In order to control exhaust noise, some exhaust systems include the one or more bifurcation air bleeding valves installed consistent with exhaust system.
There are two types of settings for bifurcation air bleeding valve tool：It opens and closes, exhaust gas flow (and reducing exhaust noise) can be limited or allows gas
By without limiting noise.When valve opens or closes, due to the discontinuity of valve position, noise level can change dramatically,
This is non-desired effect in some cases.In addition, sonic boom event is due to causing there are acoustic mode in exhaust system
The increased region of noise.These patterns are usually expressed as increasing and decreasing for noise level, because with the increasing of engine rpm
Add, accounts for leading noise rank and transmitted in these patterns.
Emission control is used to open or close state based on control input come control valve, which inputs in addition to it
Further include the shifting state and engine revolution per minute (rpm) of vehicle except its setting.Look-up table can be used in control system
The air bleeding valve that the various combinations matches of control input are opened or closed.It includes multiple valve settings to be by dual control system configuration
It is probably unpractical, because must take into consideration many factors to alleviate exhaust sonic boom.For example, the vehicle with ten shift transmissions
There can be 7 rpm ranges, and 13 shifting states are equivalent to each performance mode setting 91 values in total.In bifurcation valve system
In, controller is responded according to expected exhaust and is matched valve setting with governing factor using look-up table.In bifurcation valve system
The middle valve position partially opened that provides is to adapt to multiple governing factors (such as shifting state, engine RPM range, the pedal of vehicle
The performance mode of position and vehicle) it may need to calibrate the look-up table with thousands of variables.
Accordingly, it is desired to provide a kind of continuous exhaust pneumatic wallop valve control based on function, is come using the control parameter of limited quantity
The valve position of infinite variable is provided.User's optional mode adjust automatically valve position can be based on and be based on various control parameters by providing
The system that the selected configuration of auto-- tuning controller comes is also likely to be advantageous.It is also expected to a kind of continuous exhaust pneumatic wallop valve control is provided,
It adjusts air bleeding valve angle in real time using the multivariable Control function that can be positioned according to the control parameter detected by controller
Degree.
Invention content
In one exemplary embodiment, a kind of system for controlling the exhaust noise in vehicle includes being used for exhaust system
The Variable Bleed Valves of system and the exhaust valve controller for being operably coupled to Variable Bleed Valves.Exhaust valve controller is configured as examining
Two or more control conditions of rope, and be intended to determine to operate based on two or more control conditions.The system by with
It is set to and is intended to generate control signal with two or more control conditions based on operation.The controller be configured to by
Control signal transmission is to Variable Bleed Valves.Control the exhaust valve positions that signal changes Variable Bleed Valves.Exhaust valve positions are configured
To generate exhaust noise response associated with intention is operated.
In another exemplary embodiment, it describes a kind of for controlling the computer-implemented of the exhaust noise in vehicle
Method.This method includes retrieving two or more control conditions via processor.This method further comprises via processing
Device determines that operation is intended to based on two or more control conditions, and is based on operation via processor and is intended to and two or more
Multiple control conditions generate control signal.This method includes being based on operation via processor to be intended to and two or more controls
Condition generates control signal.This method further comprises control signal transmission to Variable Bleed Valves, the control via processor
Signal processed changes the exhaust valve positions of Variable Bleed Valves.Exhaust valve positions are configured as generating exhaust associated with operation intention
Noise response.
Other than one or more features described herein, exhaust valve controller be configured to based on two or
More control conditions are intended to determine to operate.Operation is intended to associated with specific exhaust valve positions.Exhaust valve controller into
One step is configured as being intended to determine control signal based on sigmoid function and operation.
According to another embodiment, operation, which is intended that, to carry out user's selection by vehicle user.
According to yet another embodiment, operation be intended to include be configured for compared with high-decibel exhaust noise first mode and by with
Set the second mode for relatively low decibel exhaust noise.
According to another embodiment, control signal includes indicating that the dynamic rate of the predetermined variation rate of Variable Bleed Valves is set
It is fixed.Dynamic rate setting is intended to based on operation.
According to another embodiment, which is configured as according to continuous S-shaped function based on two or more controls
Condition is intended to determine to operate.
According to yet another embodiment, operation is intended that cruise, and the controller be configured as retrieving motor torque change rate,
Vehicle acceleration is retrieved, and Variable Bleed Valves are positioned based on motor torque change rate and vehicle acceleration.
In another embodiment, operation is intended that quasi-static, and the controller is configured as retrieval motor torque, inspection
Rope motor torque change rate, and Variable Bleed Valves are positioned to alleviate based on motor torque and motor torque change rate
Valve is shaken.
According to another embodiment, operation is intended that pedal and evens up, and the controller be configured as retrieval motor torque,
Motor torque change rate is retrieved, and Variable Bleed Valves are positioned based on motor torque and motor torque change rate, and
The position is configured as generating higher decibel exhaust noise.
In another embodiment, operation is intended to include starting type.It includes that keying starts and starts automatically to start type.
In response to vehicle launch, which is configured as positioning Variable Bleed Valves based on type is started.
In another embodiment, this method includes：It is determined based on two or more control conditions via processor
Operation is intended to, wherein operation intention is associated with specific exhaust valve positions；And it is based on sigmoid function and operation via processor
It is intended to generate control signal.
According to an exemplary embodiment, operation, which is intended that, to carry out user's selection by vehicle user.
In another exemplary embodiment, operation is intended to include the first mould being configured for compared with high-decibel exhaust noise
Formula and the second mode for being configured for relatively low decibel exhaust noise.
In another embodiment, this method includes by the way that control signal transmission to Variable Bleed Valves is transmitted the control
Signal and the exhaust valve positions for changing Variable Bleed Valves via the control signal.The control signal includes instruction Variable Bleed Valves
Predetermined variation rate dynamic rate setting.Dynamic rate setting is intended to based on operation.
In another embodiment, this method includes being based on two or more according to continuous S-shaped function via processor
Control condition carrys out evaluation operation intention.
In another embodiment, this method includes determining to operate via processor be intended that cruise, examine via processor
Rope motor torque change rate is retrieved vehicle acceleration via processor, and is changed based on motor torque via processor
Rate and vehicle acceleration position Variable Bleed Valves.
In yet another exemplary embodiment, this method further comprises being intended that via processor determination operation quasi-static
, via processor retrieval motor torque, via processor retrieve motor torque change rate, and be based on via processor
Motor torque and motor torque change rate are shaken to position Variable Bleed Valves with graduated release valve.
According to a further exemplary embodiment, which further comprises determining operation meaning via processor
Figure be pedal even up, via processor retrieval motor torque, via processor retrieve motor torque change rate, and via
Processor positions Variable Bleed Valves based on motor torque and motor torque change rate.The position is configured as generating higher
Decibel exhaust noise.
In another embodiment, this method includes positioning Variable Bleed Valves in vehicle launch via processor response.It is fixed
Position is based on the startup type started including initiation key and automatically.
From described in detail below, features described above and advantage and this hair of the optimal mode of the present invention obtained in conjunction with attached drawing
Bright other feature and advantage is easily apparent.
Description of the drawings
Other feature, advantage and details occur in the following detailed description only by means of example, and the detailed description is with reference to attached
Figure, wherein：
Fig. 1 depicts example vehicle accoding to exemplary embodiment；
Fig. 2 is the figure of the system of the exhaust noise in the vehicle for control figure 1 accoding to exemplary embodiment；
Fig. 3 is that the vertical view of the Variable Bleed Valves cylinder for using in the system of figure 2 accoding to exemplary embodiment is shown
It is intended to；
Fig. 4 is the flow chart that the method for exhaust noise is controlled using the system of Fig. 2 accoding to exemplary embodiment；And
Fig. 5 is the multi-variable function for controlling exhaust noise using the system of Fig. 2 accoding to exemplary embodiment
Curve graph.
Specific implementation mode
Being described below only has exemplary nature and is not intended to be limited to the disclosure, its application or purposes.It should be understood that
, throughout the drawings, corresponding drawing reference numeral indicates identical or corresponding part and feature.As used herein, term
Module refers to processing circuit, may include application-specific integrated circuit (ASIC), electronic circuit, processor (shared, special or in groups)
And execute the memories of one or more softwares or firmware program, combinational logic circuit and/or provide it is described it is functional its
Its suitable components.
Accoding to exemplary embodiment, Fig. 1 depicts the vehicle 100 with the system 102 for controlling exhaust noise.One
In a little aspects, exhaust noise can be generated by the exhaust system 108 of vehicle 100.System 102 includes Variable Bleed Valves 104 and exhaust
Valve control 106.Though it is shown that performance vehicle, it should be appreciated that, vehicle 100 can be with the row for internal combustion engine
Any vehicle of gas system, all such as (e.g.) automobiles, truck, multi-purpose vehicle etc..
Fig. 2 depicts the system 102 for controlling the exhaust noise in vehicle 100 accoding to exemplary embodiment.Now
With reference to figure 2, system 102 includes the Variable Bleed Valves 104 unanimously installed with exhaust system 108.Variable Bleed Valves 104 include connection
To the valve actuator 206 of Variable Bleed Valves cylinder 204.Valve actuator 206 is configured as by making valve system surround perpendicular to logical
The axis for crossing the airflow direction of exhaust system 108 rotates to change the position of valve system 202.Variable Bleed Valves 104 can be via control
Bus 208 processed is operably coupled to exhaust valve controller 106.Although Variable Bleed Valves 104 are by making valve system 202 around vertical
Directly rotated in the axis of airflow direction to change the position of valve system, it should be appreciated that, valve system 202 can be with other sides
Formula opens and closes.In certain aspects, Variable Bleed Valves cylinder 204 can take other shapes with adapt to for opening and closing
The various mechanisms of valve.For example, exhaust system 108 may include rectangular or rectangle exhaust pipe, and Variable Bleed Valves cylinder 204 can be class
Like shape.Variable Bleed Valves 104 can be configured as configuring with other multivariables and open and close.
Exhaust valve controller 106 is control module, may include the calculating for being operably coupled to exhaust valve controller 106
The one or more processors 110 of machine memory (not shown).Processor 110 is configured as being handled in real time from one or more
The input of engine sensor (not shown) or vehicle computer (not shown).Exhaust valve controller 106 may include hardware and soft
Both parts (firmware, computer program, calibration data etc.).Exhaust valve controller 106 is operably coupled to one or more
Vehicle computer (such as vehicle electric control module (ECM) (not shown)) and/or it is configured as retrieval vehicle control condition
One or more sensors (not shown), and be in communication with.
Exhaust valve controller 106 is operably coupled to user interface 210.User interface 210 can be hard control (for example,
Knob, button, optional switch etc.), or can be soft control (for example, user-selectable options, touch screen etc. in digital interface)).
User interface 210 can be configured as receiving one or more users input of the desired exhaust sound characteristics of instruction vehicle 100.Sound
Sound characteristic may be based on the at user option of the operation intention of vehicle 100.For example, user interface 210 may include instruction operation
One or more settings of intention, highway, cruise, contest, performance etc..Each corresponding operation be intended to include and its
Associated predetermined sound distribution.For example, if operation is intended that " performance ", sound distribution associated with performance may include
Mellow and full, high-decibel exhaust sound allows the complete characteristic of engine to be reverberated in whole gas extraction system.On the other hand
In, operation is intended to be " cruise ", can be associated with low decibel exhaust sound.
According to some embodiments, exhaust valve controller 106 can receive user's input from user interface 210, and based on defeated
Enter to determine that operation is intended to.Exhaust valve controller 106 can input to determine that operation is intended to based on individual user interface, or can base
In user's input operation input is determined in conjunction with the other performance factor (for example, control condition) of vehicle 100.Other factors can be
Such as speed, engine rpm, motor torque, rpm change rates and motor torque change rate etc..
Variable Bleed Valves 104 can be configured as receiving control signal from exhaust valve controller 106, and generate suitable for specific
Operation is intended to the specific exhaust noise response of (associated with it).Exhaust noise response can be for example to be exported by exhaust system 108
Predetermined amplitude sound (as unit of decibel).Sound property (acoustic amplitudes) is associated with operation intention.For example, if vehicle
Early morning operates on quiet street, is operated under performance mode or in contest environment with vehicle it would be possible that being not intended to generate
When identical sound.Exhaust valve controller 106 can retrieve control condition, and (it may include defeated from the user of user interface 210
Enter), and be intended to determine to operate based on control condition.Processor 110 can be based on operation and be intended to generate control signal, and will
Control signal transmission is to valve actuator 206.Valve actuator 206 can be configured as receiving control signal and be based on from air bleeding valve control
What device 106 processed received instructs to change the position of valve system 202.
Fig. 3 is the vertical view of the Variable Bleed Valves cylinder 204 for using in the system of figure 2 accoding to exemplary embodiment
Figure.As depicted in figure 3, Variable Bleed Valves cylinder 204 can consistently be configured with the exhaust gas direction by exhaust system 108.It can
Becoming air bleeding valve 104 can be by rotating valve system 202 extremely via valve actuator 206 (being for the sake of clarity not shown in figure 3)
Special angle 302 formed by center line 304 with Variable Bleed Valves cylinder 204 changes the position of valve system 202.Such as institute above
Explain, valve system 202 can take from different shape shown in this article, and can activate in different ways.
Each position of valve system 202 can be configured as generating specific exhaust noise response.For example, in completely closing
The valve system of position (for example, position 202A) can generate decibel more lower than (for example, position 202B) in a partly opened position
Noise response.Partial open position (for example, position 202C) can be generated than being more closed position (for example, position 202B)
Higher decibel noise response.Although illustrating only three positions in figure 3, it should be appreciated that, system 102 can by with
It is set to and is adjusted to Variable Bleed Valves 104 to generate an infinite number of position of any amount of predefined exhaust noise response.
In certain aspects, exhaust valve controller 106 can determine that valve actuator 206 changes the speed of the angle of valve system 202
Rate.Other than set rate associated with operation intention, real-time dynamicly change change rate based on various governing factors, because
This is regarded as dynamic rate setting.By changing the change rate for changing exhaust valve positions, exhaust valve controller 106 can delay
Solve the unexpected unexpected change for throwing open associated noise level from closing or partially closed position with Variable Bleed Valves 104
Change.In certain aspects, exhaust valve controller 106 can be intended to based on determining operation to determine that dynamic rate is set.
Fig. 4 depicts the flow that the method 400 of exhaust noise is controlled using the system of Fig. 2 accoding to exemplary embodiment
Figure.Referring now to Figure 4, the step of 402 drawing processing device 110 of frame is configured as retrieving two or more control conditions.One
In a little aspects, processor 110 can from the vehicle computer being operatively connected and/or be configured to determine that control condition one or
Multiple aiding sensors retrieve control condition.Control condition may include such as speed, vehicle speed variation rate (vehicle acceleration), start
Machine torque, motor torque change rate, engine rpm, accelerator pedal position, accelerator pedal position change rate, time factor (example
Such as, the time span that control factor remains unchanged) including the one or more values for controlling signals of the triggering transmission of processor 110
Predetermined threshold, the control signal enabling or the stopping continuously valve control based on function.Other governing factors are expected.
At frame 404, processor 110 can determine that operation is intended to based on two or more control conditions.Operation is intended to
It is associated with specific exhaust valve positions.In some embodiments, operation, which is intended that, to carry out user's selection by 100 user of vehicle
's.Therefore, exhaust valve controller 106 can retrieve the information that instruction operation is intended to from user interface 210.Operation is intended to may include controlling
Exhaust system processed how sounding predefined sound distribution or pattern.For example, operation be intended to may include being configured for it is higher
The first mode of decibel exhaust noise (for example, being evened up for contest and/or performance, intentionally with pedal makes motor rotation etc.) and
It is configured for the second mode (for example, cruise mode etc.) of lower decibel exhaust noise.
In other aspects, operation is intended to be automatically determined based on two or more control conditions by processor.For example,
In one embodiment, processor 110 can determine that vehicle 100 is in cruise based on the speed observed within a predetermined period of time
State.Processor 110 can further determine that operation based on instruction driver by the gas pedal change rate of the speed of throttle pressure port
It is intended to.Pedal rate of change is associated with motor torque change rate.Even if the selected operation of user is intended to be set to possible generation
The first mode (performance) of more high-decibel noise profile, processor 110 also produce control signal, which is configured as
Keep automobile mute to avoid uncomfortable continuing noise.
As represented by frame 406, processor 110 can be intended to generate control with two or more control conditions based on operation
Signal.In certain aspects, processor 110 can be configured as being based on two or more control conditions according to continuous S-shaped function
To generate control signal.Processor 110 can retrieve two or more control conditions (for example, engine rpm and engine turn
Square), and it is applied to sigmoid function using control condition as input.In certain aspects, processor 110 can be based further on packet
The multi-variable function of Gaussian function is included to generate control signal.
If control signal is envisioned for curve graph, select sigmoid function to generate the basic configuration of sigmoid curve figure.
According to some embodiments, exhaust valve controller 106 can set basic response using sigmoid function based on engine rpm and torque
Function.Natural priority selection closes valve with low speed and low torque, and opens valve, wherein saturation point (valve with high rpm and high torque (HT)
Open completely) it is happened at the somewhere before maximum rpm and torque capacity.Sigmoid function follows the response naturally.
Referring briefly to Fig. 5, depict accoding to exemplary embodiment have be added for control exhaust noise height
The curve graph of the basic sigmoid function of this function.Sigmoid function is the mathematical function for having serpentine curve (sigmoid curve).In Fig. 5
Described, one embodiment of exhaust valve controller 106 can be configured as according to the control for including engine rpm and S-shaped deviation
Because usually determining valve opening.In certain aspects, four parameters, two bias terms and two weight terms are used only in processor 110
To control sigmoid function surface.Define two S-shaped bias terms：One for RPM axis and another is for torque axis.Deviation is joined
Engine rpm and torque when number occurs with the movement of Variable Bleed Valves 104 (due to the translation of rpm and torque) is directly related.
Also define two weight terms：One for rpm axis and another is for torque axis.Weight " W " is the slope of control surface,
It determines when rpm and torque change the speed that variably-timed valve opens/closes.For example, valve opening is defined as RPM by an exemplary embodiment
Function so that
Valve opening (percentage)=1/ (1+e-(Bias+W*rpm))。
As explained so far, processor 110 can be applied to sigmoid function to generate valve using controlling elements as input
The basic configuration of responsive control signal.According to an exemplary embodiment, in conjunction with sigmoid function vehicle is based on using Gaussian function
Operating condition passes in and out noise abatement region (that is, sonic boom event etc.) to mix.In mathematics, for arbitrary real constant a, b and
C, Gaussian function (often referred to simply as Gauss) are the functions of following form：
In some embodiments, real constant a, b and c is associated with two or more control conditions.
Depicted in figure 5 in curve graph, valve angle (being described with Z axis 502) is modeled as engine RPM and (is shown as X-axis
504) function of percentage (being shown as Y-axis 506) is stepped on pedal.Gaussian function is provided in the curve graph of Fig. 5 in rpm or y
The paddy shape feature 508 run in the length of axis.The function allows control surface to deviate basic sigmoid function, and therefore eliminates quick-fried
Sound event.Using Gaussian function disengaging noise abatement region (that is, sonic boom event) is mixed based on vehicle operation conditions.Selection
Gaussian function come alleviate due in exhaust system there are acoustic mode caused by sonic boom event because Gaussian function matching exist
The shape of rpm and the typical response in torque the two.These patterns are usually expressed as increasing and decreasing for noise level, because
It with the increase of engine rpm, accounts for leading noise rank and is transmitted in these patterns, and with height and width and Gaussian function
Similar shape.
Gaussian function defines expected control surface based on pedal percentage (position) and engine rpm, or in other words,
The desired location of valve.If pedal or engine rpm variations are very fast, valve can also move quickly, this, which may result in, makes an uproar
Sound suddenly change.In one embodiment, exhaust valve controller 106 can be based on control condition and operation is intended to use sigmoid function
To generate control signal to establish the basic exercise of valve, and alleviate exhaust by deviateing basic function using Gaussian function
The sonic boom of system.
In another aspect, exhaust valve controller 106 can be based on the control condition next life including dynamic rate limiter
At control signal.Dynamic rate limiter can be used for limiting the speed of valve movement.For example, if pedal position quickly changes (example
Such as, very strong pedal pushes), then it is contemplated that control surface by the suddenly change of order valve angle, but valve rate limits
Device processed will limit the moveable rate of valve.In this case, valve position will lag behind command position to a certain extent, still
It also can smooth transition.
Referring again to FIGS. 4, after generating control signal, as represented by frame 406, processor 110 can will control signal
Variable Bleed Valves 104 are transmitted to, as indicated at frame 408.Control signal is configured as changing the position of Variable Bleed Valves 104.
Exhaust valve positions are configured as generating exhaust noise response associated with operation intention.
In certain aspects, operation is intended that at user option, and may include the predetermined set for valve position.
In other aspects, exhaust valve controller 106 also determines that operation is intended to other than predetermined set based on various governing factors.Example
Such as, according to one embodiment, operation is intended that cruise, and processor 110 is configured as retrieval motor torque change rate, retrieval
Vehicle acceleration, and Variable Bleed Valves 104 are positioned based on motor torque change rate and vehicle acceleration.As described above,
Processor 110 can determine that vehicle 100 is in cruising condition based on the speed observed within a predetermined period of time.
Processor 110 can further determine that behaviour based on instruction driver by the gas pedal change rate of the speed of throttle pressure port
Work is intended to.Pedal rate of change is associated with motor torque change rate.Even if the selected operation of user is intended to be set to possible life
At the first mode (performance) of more high-decibel noise profile, processor 110 also produces control signal, which is configured
To keep automobile mute to avoid uncomfortable continuing noise.
In certain aspects, whether it is " exiting cruise to alleviate " that exhaust valve controller 106 can determine that operation is intended to.Air bleeding valve
Controller 106 can monitor the change rate that pedal is stepped on and/or monitoring vehicle acceleration.Percentage speed variation, which may indicate that, needs total power
Operation be intended to.Therefore, exhaust valve controller 106 can exit the function and open Variable Bleed Valves 104.
According to another embodiment, exhaust valve controller can determine that operation is intended that maintenance based on the total amount that pedal is stepped on
Current operation status.In other words, it is quasi-static to can determine that operation is intended that for exhaust valve controller 106.Quasi-static operation intention refers to
Show, based on the predetermined threshold (for example, ± 2% or smaller) of instruction pedal position variation, minor change can be ignored to prevent from can be changed
The trembling of air bleeding valve 104 (quickly and/or repeatedly changes the position of valve system 202 micro).Although using 2% as an example,
It should be appreciated that be, it is possible to use another threshold value come determine operation be intended to.
Corresponding gas pedal depression amount can influence motor torque.Specifically, when pedal steps on some small amount, hair
Motivation torque increases similar small amount.When gas pedal steps on notable (significantly changing pedal position), in response, hair
Motivation torque can be affected.Therefore, in one embodiment, processor 110 is configured as retrieval motor torque, retrieval hair
Motivation torque rate of change, and based on motor torque and motor torque change rate come position Variable Bleed Valves 104 with alleviate
Valve is shaken.Processor 110 can determine pedal position to replace determining motor torque.
In other aspects, when determine that pedal is stepped on is that pedal is evened up (for example, making engine in the case where not moving
Rotation) it may be advantageous.Under some operating conditions, it may be desirable to hear the entire audio characteristic of engine.Accordingly, it is possible to
Wish that limitation can inhibit any alleviation of exhaust noise of noise.In other aspects, it may be desirable to Variable Bleed Valves 104
It partially opens to enhance sound property.According to one embodiment, processor 110 can be stepped on based on pedal and step on change rate with pedal
It is evened up to determine that operation is intended that pedal.Therefore, processor 110 can be configured as retrieval motor torque, retrieval engine turns
Square change rate, and Variable Bleed Valves are positioned based on motor torque and motor torque change rate.The position can be configured
To generate higher decibel exhaust noise.In other aspects, which can be configured as generating predetermined sound characteristic.Sound is special
Property example can be engine rumble, grunt etc..
According to yet another embodiment, operation is intended to the startup type that may include indicating how vehicle starts.This is grasped for determining
Make to be intended to may be useful, because some ignition systems are configured as at vehicle stopping (for example, traffic lights) closing,
And it is seamlessly restarted when brake pedal is released.The sound of startup is reduced to and does not hear to may be advantageous as far as possible
's.In other aspects, when being started with keying and start, it may be necessary to different sound properties.In one embodiment, it opens
Dynamic type can be that keying starts or starts automatically.In response to detecting that vehicle launch, exhaust valve controller 106 can be configured as base
Variable Bleed Valves 104 are positioned in starting type.
When embodiment described herein that can provide the control of fine-resolution valve, while simplify the calibration of specific exhaust system
Between.Some embodiments also by the suddenly change in elimination exhaust noise and can minimize or enhance the sonic boom driven away to improve
Sound quality.The continuous multi-variable function such as such as sigmoid function and Gaussian function is applied to the input that minimum number can be used in control input
Parameter provides the benefit of continuous control exhaust sound.In addition, input parameter is easy to by being responsible for calibration and improving particular vehicle
The personnel of the control system of response explain.
Continuous function also provides an infinite number of valve position.Continuous function allows control valve position not have discontinuous jump
Jump.As previously mentioned, if alleviating sonic boom event using valve, lead to the control strategy of discrete valve position (or discontinuity)
The discontinuity that can lead to noise signal at the time of most sensitive, so as to cause attractive event.In contrast, continuous control
The air bleeding valve of system allows effect swimmingly to mix disengaging, to reduce the ability that audience pays attention to the event to the maximum extent.
The more fine-resolution of valve control can improve user experience, because unexpected noise can be alleviated, and it is alternative
Ground enables the desired natural sound characteristic of engine, and indicates specific operation situation (for example, street driving, performance, patrolling
Boat etc.) system governing factor can automatically detect the desired natural sound characteristic of engine.Governing factor can be by system certainly
It is dynamic to monitor and for enhancing user experience.
Although describing above disclosure by reference to exemplary embodiment, it will be appreciated by those skilled in the art that
Without departing from the scope of this disclosure, various changes can be carried out and available equivalents replaces its element.In addition, not taking off
In the case of essential scope from the disclosure, many modifications can be carried out so that specific situation or material adapt to the religion of the disclosure
It leads.Therefore, it is intended that the present disclosure is not limited to disclosed specific embodiments, but by all realities including falling within the scope of the present application
Apply example.
Claims (10)
1. a kind of system for controlling the exhaust noise in vehicle, including：
Variable Bleed Valves can be operably connected to exhaust system；And
Exhaust valve controller, can be operably connected to the Variable Bleed Valves, and the exhaust valve controller is configured as：
Retrieve two or more control conditions；And
Determine that operation is intended to based on the two or more control conditions；
It is intended to generate control signal with the two or more control conditions based on the operation；And
By the control signal transmission to the Variable Bleed Valves, wherein the control signal changes the row of the Variable Bleed Valves
Air valve position, wherein the exhaust valve positions are configured as generating exhaust noise response associated with the operation intention.
2. system according to claim 1, wherein the exhaust valve controller is configured to：
Determine that operation is intended to based on the two or more control conditions, wherein the operation is intended to and specific air bleeding valve
Position is associated；And
It is intended to based on Gaussian function, sigmoid function and the operation to generate the control signal.
3. system according to claim 1, wherein the operation is intended to that user's choosing can be carried out by the user of the vehicle
It selects.
4. system according to claim 3, wherein the operation is intended to include being configured for compared with high-decibel exhaust noise
First mode and be configured for the second mode of relatively low decibel exhaust noise.
5. system according to claim 4, wherein the control signal for reaching the Variable Bleed Valves includes instruction institute
State the dynamic rate setting of the predetermined variation rate of Variable Bleed Valves；And
The wherein described dynamic rate setting is intended to based on the operation.
6. system according to claim 1, wherein the controller is configured as according to continuous Gaussian function and continuous S-shaped
Function determines that the operation is intended to based on the two or more control conditions.
7. system according to claim 1, wherein the operation is intended that cruise, and the controller is configured as：
Retrieve motor torque change rate；
Retrieve vehicle acceleration；And
The Variable Bleed Valves are positioned based on the motor torque change rate and the vehicle acceleration.
8. system according to claim 1, wherein the operation is intended that quasi-static, and the controller is configured
For：
Retrieve motor torque；
Retrieve motor torque change rate；And
It is shaken with graduated release valve based on the motor torque and the motor torque change rate to position the Variable Bleed Valves.
9. system according to claim 1, wherein the operation is intended that pedal and evens up, and the controller is configured
For：
Retrieve motor torque；
Retrieve motor torque change rate；And
The Variable Bleed Valves, and the position quilt are positioned based on the motor torque and the motor torque change rate
It is configured to generate higher decibel exhaust noise.
10. system according to claim 1, wherein operation intention includes starting type, the startup type includes
Keying starts and automatic startup, and in response to vehicle launch, the controller is configured as positioning based on the startup type
The Variable Bleed Valves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/425433 | 2017-02-06 | ||
| US15/425,433 US20180223709A1 (en) | 2017-02-06 | 2017-02-06 | Function based continuous exhaust valve control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108394268A true CN108394268A (en) | 2018-08-14 |
Family
ID=62909677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810112057.9A Pending CN108394268A (en) | 2017-02-06 | 2018-02-05 | Function-based continuous exhaust valve control |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20180223709A1 (en) |
| CN (1) | CN108394268A (en) |
| DE (1) | DE102018102530A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017206642A1 (en) * | 2017-04-20 | 2018-10-25 | Bayerische Motoren Werke Aktiengesellschaft | Exhaust flap for an exhaust system of a motor vehicle, control unit for such an exhaust flap, and method for operating such an exhaust flap |
| IT201900013317A1 (en) * | 2019-07-30 | 2021-01-30 | Ferrari Spa | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION THERMAL ENGINE |
| US11169047B2 (en) * | 2020-01-28 | 2021-11-09 | GM Global Technology Operations LLC | Method for determining a noise or vibration response of a vehicle subassembly and test apparatus for same |
| KR20220022294A (en) * | 2020-08-18 | 2022-02-25 | 현대자동차주식회사 | Method for Engine Exhaust Sound Based on Drive Mode and Smart Vehicle Exhaust System Thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20180223709A1 (en) | 2018-08-09 |
| DE102018102530A1 (en) | 2018-08-09 |
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Application publication date: 20180814 |