CN103912432B - Random regulation engine firing frequencies reduces the system and method for vibration - Google Patents
Random regulation engine firing frequencies reduces the system and method for vibration Download PDFInfo
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- CN103912432B CN103912432B CN201410006191.2A CN201410006191A CN103912432B CN 103912432 B CN103912432 B CN 103912432B CN 201410006191 A CN201410006191 A CN 201410006191A CN 103912432 B CN103912432 B CN 103912432B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
- F02D13/0219—Variable control of intake and exhaust valves changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/06—Cutting-out cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/28—Control for reducing torsional vibrations, e.g. at acceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P9/00—Electric spark ignition control, not otherwise provided for
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The present invention relates to the system and method regulating engine firing frequencies at random to reduce vibration.Specifically, a kind of system according to the principle of the present invention includes light a fire mark module, biasing generation module and ignition control module.Described igniting mark module determines igniting mark based on driver torque request.Described biasing generation module stochastic generation biases.Described ignition control module adds igniting mark to operation summation when the bent axle of each engine rotates through predetermined angular, biasing is added to operation summation, and performs ignition event when running summation more than or equal to predetermined value in the cylinder of engine.
Description
Cross-Reference to Related Applications
This application claims the rights and interests enjoying the U.S. Provisional Application No.61/749510 that on January 7th, 2013 submits to.Above-mentioned Shen
Complete disclosure please is incorporated herein by reference in the application.
The application relates to following U.S. Patent application: the No.13/798451 that on March 13rd, 2013 submits to, in March, 2013
No.13/798586, on March 13rd, 2013 that the No.13/798351 submitted to for 13rd, on March 13rd, 2013 submit to submit to
No.13/798590, on March 13rd, 2013 submit to No.13/798536, on March 13rd, 2013 submit to No.13/798435,
The No.13/798737 that the No.13/798471 that on March 13rd, 2013 submits to, on March 13rd, 2013 submit to, on March 13rd, 2013
The No.13/ that the No.13/798518 that the No.13/798701 submitted to, on March 13rd, 2013 submit to, on March 13rd, 2013 submit to
799129, on March 13rd, 2013 submit to No.13/798540, on March 13rd, 2013 submit to No.13/798574,2013
No.13/799116, on March 13rd, 2013 that the No.13/799181 that March 13 submitted to, on March 13rd, 2013 submit to submit to
No.13/798624, the No.13/798384 of submission on March 13rd, 2013 and the No.13/ submitted on March 13rd, 2013
798400.The complete disclosure of above-mentioned application is incorporated herein by reference in the application.
Technical field
The present invention relates to the spark rate for random regulation engine to reduce vibration when cylinder disables
System and method.
Background technology
Background describes the background for introducing the present invention generally provided herein.In the scope that this background technology describes
In, the achievement of the inventor of current signature, and this description, those sides that prior art may not be constituted when submitting application to
Face, neither expressing the most non-is considered as impliedly the prior art of the present invention.
Explosive motor makes the air in cylinder and fuel mixture combusts to drive piston, thus produces driving torque.
Enter the air stream of engine by throttle adjustment.More specifically, throttle adjustment air throttle circulation area, thus increase
Add deduct the air stream of few entrance engine.Along with air throttle circulation area increases, the air stream entering engine increases.Fuel
The speed of control system regulation fuel injection, in order to provide desired air/fuel mixture to cylinder and/or to realize the phase
The moment of torsion output hoped.Increase the moment of torsion output providing the air of cylinder and the amount of fuel can increase engine.
In spark ignition engine, spark is provided to the air/fuel mixture of cylinder and starts burning.In compression point
In fire engine, the compression in cylinder is provided to the air/fuel mixture burn of cylinder.Spark timing and air mass flow can
Be for regulate the moment of torsion of spark ignition engine output leading indicator, and fuel flow rate could be for regulate compression point
The leading indicator of the moment of torsion output of fire engine.
In some cases, one or more cylinders of engine can be deactivated and reduce fuel consumption.Such as, gas is worked as
Cylinder disables and can disable one or more cylinder time engine can produce the moment of torsion of request amount.Disabling of cylinder can include prohibiting
Only cylinder spark and injection fuel are opened and forbidden to air inlet and the exhaust valve of cylinder.
Summary of the invention
A kind of system according to the principle of the present invention includes light a fire mark module, biasing generation module and IGNITION CONTROL mould
Block.Igniting mark module determines igniting mark based on driver torque request.Biasing generation module stochastic generation biasing.Point fire control
Molding block adds igniting mark to operation summation when the bent axle of each engine rotates through predetermined angular, described biasing is added
It is added to run summation, and in the cylinder of engine, performs ignition event when running summation more than or equal to predetermined value.
1. 1 kinds of systems of scheme, including:
Igniting mark module, described igniting mark module determines igniting mark based on driver torque request；
The biasing generation module of stochastic generation biasing；And
Ignition control module, its:
Igniting mark is added to operation summation when bent axle at each engine rotates through predetermined angular；
Biasing is added to operation summation；And
In the cylinder of engine, ignition event is performed when running summation more than or equal to predetermined value.
The scheme 2. system as described in scheme 1, described igniting mark is set equal to by wherein said igniting mark module
The ratio of the moment of torsion output of engine when driver torque request and each cylinder in activating engine.
The scheme 3. system as described in scheme 1, is wherein determining that described operation summation is the most predetermined more than or equal to described
After value, described ignition control module deducts biasing from described operation summation.
The scheme 4. system as described in scheme 1, wherein said ignition control module perform after described ignition event from
Described operation summation deducts predetermined value.
The scheme 5. system as described in scheme 1, farther includes spark rate module, described spark rate module based on
The amount that bent axle between ignition event rotates determines the spark rate of engine.
The scheme 6. system as described in scheme 1, the most each described bent axle rotates through described IGNITION CONTROL during predetermined angular
Biasing is added to operation summation by module.
The scheme 7. system as described in scheme 6, wherein when the spark rate of engine is at the resonant frequency of vehicle structure
Time in preset range, biasing is added to operation summation by described ignition control module.
The scheme 8. system as described in scheme 1, wherein said biasing generation module is in the biasing range that mean value is 0
Randomly choose biasing.
The scheme 9. system as described in scheme 8, wherein when engine spark rate and vehicle structure resonant frequency it
Between difference reduce time described biasing generation module increase this biasing range.
The scheme 10. system as described in scheme 8, wherein when the spark rate of engine is at the resonant frequency of vehicle structure
Preset range in time described biasing generation module make this biasing range increase to non-zero value from 0.
11. 1 kinds of methods of scheme, including:
Igniting mark is determined based on driver torque request；
Stochastic generation biases；
The bent axle of engine adds described igniting mark to operation summation when rotating through predetermined angular every time；
Described biasing is added to described operation summation；And
In the cylinder of engine, ignition event is performed when described operation summation is more than or equal to predetermined value.
The scheme 12. method as described in scheme 11, farther includes that described igniting mark is set equal to driver and turns round
The ratio of the moment of torsion output of engine when square request and each cylinder in activating engine.
The scheme 13. method as described in scheme 11, further includes at and determines whether described operation summation is more than or equal to
Described biasing is deducted from described operation summation after described predetermined value.
The scheme 14. method as described in scheme 11, further include at execution described ignition event after from described operation
Summation deducts predetermined value.
The scheme 15. method as described in scheme 11, the amount based on bent axle between ignition event rotates that farther includes is come really
Determine the spark rate of engine.
The scheme 16. method as described in scheme 11, farther includes institute when each described bent axle rotates through predetermined angular
State biasing and add described operation summation to.
The scheme 17. method as described in scheme 16, farther includes spark rate being total at vehicle structure when engine
Time in the preset range of vibration frequency, described biasing is added to described operation summation.
The scheme 18. method as described in scheme 11, farther includes to randomly choose in the biasing range that mean value is 0
Described biasing.
The scheme 19. method as described in scheme 18, farther includes when the spark rate of engine and being total to of vehicle structure
Difference between vibration frequency increases described biasing range when reducing.
The scheme 20. method as described in scheme 18, farther includes spark rate being total at vehicle structure when engine
Described biasing range is made to increase to non-zero value from 0 time in the preset range of vibration frequency.
By the detailed description provided below, further areas of applicability of the present invention will be clear from.It should be appreciated that
Thered is provided describe in detail and concrete example be only used for illustrate purpose, and and be not used to limit the scope of the present invention.
Accompanying drawing explanation
By detailed description of the invention and accompanying drawing, present invention will become more fully understood, in accompanying drawing:
Fig. 1 is the functional block diagram of the example engine system of the principle according to the present invention；
Fig. 2 is the functional block diagram of the example control system of the principle according to the present invention；And
Fig. 3 is the flow chart of the example control method illustrating the principle according to the present invention.
In the accompanying drawings, reference can be repeated for identifying similar and/or similar elements.
Detailed description of the invention
The spark rate that can regulate engine meets the torque request of driver to the cylinder disabling engine simultaneously.?
In one example, igniting mark is used to regulate described spark rate.Igniting mark is driver torque request and activation engine
In each cylinder time maximum engine torque output ratio.Each cylinder events in the firing order of engine it
After, igniting mark is added to run summation.Cylinder events means that the bent axle generating spark when cylinder activates in the cylinder turns
Angle increment.When running summation more than or equal to predetermined value (such as, 1), in the next cylinder of firing order, perform igniting
Event and from run summation deduct predetermined value.
In one example, 8 cylinder engines can have the igniting mark of 0.5.Therefore, start to be 0 if running summation,
After a cylinder events, so run summation equal to 0.5 and do not perform ignition event.After 2 cylinder events, fortune
Row summation is equal to 1 and performs ignition event.Run summation and subtracted 1 subsequently, and run summation continuation in this way plus igniting
Mark is to perform ignition event in other cylinders each of engine.
Regulation spark rate can produce following spark rate in the above described manner, described spark rate activation power system installed part
And the natural resonance of the vehicle structure that driver's interactive component-such as is between seat, steering wheel and pedal.Can use the fastest
The form of the spectral concentration that speed Fourier transformation generates represents the noise at driver's interactive component and vibration.Excitation vehicle knot
The spike of the natural resonance derivative spectomstry density of structure, driver can be made to experience vehicle noise for described spike and vibration increases.
Regulate the spark rate of engine according to control system and method for the present invention at random thus reduce the cylinder deactivation phase
Between noise and vibration.Mark of lighting a fire after each cylinder events in engine ignition order is added to run summation,
And in the next cylinder of firing order, ignition event is performed when running summation more than or equal to predetermined value.By at random
Generate biasing and before by described operation summation compared with predetermined value, described biasing is added to operation summation, igniting frequency
Rate is regulated at random.Described biasing can be selected from the number range that mean value is 0.Therefore, biasing is added operation summation to
Ignition event can be made to be advanced or delayed.
The spark rate of random regulation engine can produce to be had the noise of relatively flat frequency distribution and vibrates (such as,
White noise), thus reduce noise and the amount of vibration that driver experiences.It addition, regulate spark rate the most at random
The ability of the quickly change of response driver torque request is provided.Such as, when driver steps on accelerator pedal completely, igniting
Mark rises to 1 to perform ignition event in the next cylinder of engine ignition order.
Referring now to Fig. 1, engine system 100 includes engine 102, described engine 102 combustion air/fuel mixture
To produce driving torque for vehicle.The amount of the driving torque produced by engine 102 is based on from driver input module 104
Driver inputs.Air sucks engine 102 by gas handling system 108.Gas handling system 108 includes inlet manifold 110 and solar term
Door 112.Air throttle 112 can include the butterfly valve with rotatable butterfly plate.Engine control module (ECM) 114 controls air throttle and causes
Dynamic device module 116, described module 116 regulates opening thus controlling to suck the amount of the air of inlet manifold 110 of air throttle 112.
Air sucks the cylinder of engine 102 from inlet manifold 110.For illustrative purposes, it is shown that single represent cylinder
118.But, engine 102 can include multiple cylinder.Such as, engine 102 can include 2,3,4,5,6,8,10 and/or 12
Cylinder.ECM114 can make one or more cylinder deactivation, so can improve fuel economy under some engine operating condition
Property.
Engine 102 can use four-stroke cycle to operate.Four strokes include induction stroke, compression stroke, combustion stroke
And exhaust stroke.Between per refunding of bent axle (not shown), in cylinder 118, there are two in four strokes.Accordingly, it would be desirable to two
Bent axle transfers and makes cylinder 118 experience all four stroke.
During induction stroke, air is sucked cylinder 118 from inlet manifold 110 by inlet valve 122.ECM114 controls
Fuel actuator module 124, described fuel actuator module 124 regulates fuel injector 125 and arrives cylinder to control to provide
Realize the fuel quantity of desired air/fuel ratio.Fuel injector 125 can inject fuel directly in cylinder 118 or
It is ejected in the hybrid chamber associated with cylinder 118.The fuel spray that fuel actuator module 124 can suspend in the cylinder disabled
Penetrate.
The fuel of injection mixes with air and forms air/fuel mixture in cylinder 118.In the compression stroke phase
Between, the piston (not shown) compressed air/fuel mixture in cylinder 118.Engine 102 can be compression ignition engine,
Compressing ignition air/fuel mixture in cylinder 118 in this case.Alternatively, engine 102 can be spark ignition
Engine, spark actuator module 126 encourages the spark plug in cylinder 118 based on the signal from ECM114 in this case
128.Spark lights air/fuel mixture.Its topmost position being referred to as top dead-centre (TDC) can be in relative to when piston
Time time set the timing of spark.
Spark actuator module 126 can be controlled by the timing signal how far generating spark before or after being set in TDC.
Because piston position directly rotates relevant to bent axle, the operation of spark actuator module 126 can be Tong Bu with crankshaft angles.Various
Implementing in pattern, spark actuator module 126 can suspend provides spark for deactivated cylinder.
Generate spark and can be described as ignition event.When air/fuel mixture provides cylinder (such as, when activating cylinder
Time), ignition event causes burning in cylinder.Spark actuator module 126 can have the spark timing changing each ignition event
Ability.When changing spark timing signal between a upper ignition event and next ignition event, spark actuator mould
Block 126 even may can change the spark timing of next ignition event.In various enforcement patterns, engine 102 can wrap
Include multiple cylinder, and described spark actuator module 126 can change with identical amount for all cylinders in engine 102
Spark timing relative to TDC.
During combustion stroke, piston is driven downwards by the burning of air/fuel mixture, thus drives bent axle.Along with
Piston is driven downwards by the burning of air/fuel mixture, and piston moves to its bottom most position, described lowermost end position from TDC
Put referred to as bottom dead centre (BDC).
During exhaust stroke, piston starts to move up from BDC and discharged by exhaust valve 130 by-product of burning
Product.The byproduct of burning is discharged from vehicle by discharging system 134.
Inlet valve 122 can be controlled by admission cam shaft 140, exhaust can be controlled by exhaust cam shaft 142 simultaneously
Door 130.In various enforcement patterns, multiple admission cam shafts (including admission cam shaft 140) can control for cylinder 118
Multiple inlet valves (including inlet valve 122) and/or the inlet valve of multiple row cylinder (including cylinder 118) can be controlled (include air inlet
Door 122).Similarly, multiple exhaust cam shafts can control (including exhaust cam shaft 142) cylinder 118 multiple exhaust valves and/
Maybe can control the exhaust valve for multiple row cylinder (including cylinder 118) (including exhaust valve 130).
By exhaust cam phaser 148, thus it is possible to vary the inlet valve 122 opening time relative to piston TDC.By row
Gas cam phaser 150, thus it is possible to vary the exhaust valve 130 opening time relative to piston TDC.ECM114 can forbid disabling
Air inlet and the exhaust valve 122,130 of cylinder are opened.Phaser actuator module 158 can control based on the signal from ECM114
Exhaust cam phaser 148 and exhaust cam phaser 150.When implemented, it is also possible to by phaser actuator module 158
Control changeable air valve and promote (not shown).
Disabling opening of inlet valve 122 and/or exhaust valve 130 by instruction valve actuator module 160, ECM114 can
With deactivated cylinder 118.Valve actuator module 160 controls inlet valve actuator 162, described inlet valve actuator 162 open and
Close inlet valve 122.Valve actuator module 160 controls exhaust valve actuator 164, described exhaust valve actuator 164 open and
Close exhaust valve 130.In one example, valve actuator 162,164 includes magnetic valve, described magnetic valve by make cam with
Moving part separates from camshaft 140,142 and opening of valve 122,130 is disabled.In another example, valve actuator
162,164 it is independently of camshaft 140,142 to control electromagnetism or the electricity of lifting, timing and the duration of valve 122,130
Liquid actuator.In this example, camshaft 140,142, air inlet and exhaust cam phaser 148,150 and phaser actuator
Module 158 can be omitted.
Crank position (CKP) sensor 180 can be used to measure the position of bent axle.Engine coolant temperature can be used
(ECT) temperature of engine coolant measured by sensor 182.It is interior or fixed that ECT sensor 182 can be positioned at engine 102
Position is at other positions-such as radiator (not shown) of cooling agent circulation.
Manifold absolute pressure (MAP) sensor 184 can be used to measure the pressure in inlet manifold 110.In various enforcements
In pattern, engine vacuum can be measured, described engine vacuum be environmental air pressure with the pressure in inlet manifold 110 it
Between difference.Quality air stream (MAF) sensor 186 can be used to measure the quality stream of the air flowing into inlet manifold 110
Rate.In various enforcement patterns, maf sensor 186 can be positioned in housing, and described housing also includes air throttle 112.
Throttle actuator module 116 can use one or more TPS (TPS) 190 to monitor solar term
The position of door 112.Intake air temperature (IAT) sensor 192 can be used to measure the environment temperature of the air being inhaled into engine 102
Degree.The control that ECM114 can use the signal from described sensor to make engine system 100 determines.
The spark rate of ECM114 regulation engine 102 carrys out deactivated cylinder and meets driver torque request simultaneously.Starting
After each cylinder events in the firing order of machine 102, ECM114 adds igniting mark to operation summation.Igniting mark is
The ratio of driver torque request and the peak torque output of the engine 102 when all cylinder spark in engine 102.Gas
Cylinder event means to generate in the cylinder the crank angle increment of spark when activating cylinder.When running summation more than or equal to predetermined
During value (such as, 1), ECM114 performs ignition event in the next cylinder of firing order.ECM114 is subsequently from running summation
Deduct this predetermined value.
ECM114 regulates the spark rate of engine 102 at random to reduce the noise during cylinder deactivation and vibration.
ECM114 is biased by stochastic generation and described biasing is added before whether operation summation is more than or equal to predetermined value determining
It is added to run summation to realize this purpose.Described biasing can be selected from the number range that mean value is 0.Therefore, by described partially
Put add to operation summation ignition event can be made to be advanced or delayed.
Example enforcement pattern refering to Fig. 2, ECM114 includes torque request module 202, cylinder events module 204, igniting
Mark module 206, biasing generation module 208 and ignition control module 210.Torque request module 202 is based on defeated from driver
The driver's input entering module 104 determines driver torque request.Driver's input can position based on accelerator pedal.Drive
The person's of sailing input is also based on the input from cruise control system, and described cruise control system can be to change car speed
Keep the adaptive cruise control system of predetermined following distance.Torque request module 202 can store accelerator pedal position with
Expect one or more mappings of moment of torsion, and driver torque request can be determined based on a selected mapping.Moment of torsion
Request module 202 exports driver torque request.
Based on the input received from CKP sensor 180, cylinder events module 204 determines when cylinder events completes.Work as song
When axle rotates with scheduled volume, cylinder events module 204 may determine that cylinder events completes.Such as, for when activating all cylinders
Time the every rotating 360 degrees of bent axle perform 4 ignition event 8 cylinder engines, each cylinder events may correspond to the bent axle of 90 degree
Rotate.The signal when cylinder events module 204 output instruction cylinder events completes.
Igniting mark module 206 is sent out based on driver torque request and when all cylinder spark in engine 102
The peak torque output of motivation 102 determines igniting mark.Igniting mark module 206 by driver torque request divided by engine
The peak torque output of 102 is to obtain igniting mark.Igniting mark module 206 can after each cylinder events point of adjustment
Fire mark.Igniting mark module 206 output igniting mark.
Biasing generation module 208 stochastic generation biasing.Biasing generation module 208 can be the number range of 0 from mean value
Interior selection biases.In one example, biasing generation module 208 can be from negative value igniting mark and between igniting mark
Number range selects biasing.Biasing generation module 208 output biasing.
Igniting mark is added to operation summation and when always running after each cylinder events by ignition control module 210
With during more than or equal to 1 in the next cylinder of firing order perform ignition event.Ignition control module 210 can determine
Run and before whether summation is more than or equal to 1, biasing is added to operation summation.Because biasing can be positive or negative, therefore
Biasing is added to operation summation can make ignition event be advanced or delayed.After performing ignition event, ignition control module
210 deduct 1 from operation summation.
Spark rate module 212 determines the spark rate of engine 102.Spark rate module 212 can pass based on from CKP
The input that sensor 180 and ignition control module 210 receive determines spark rate.Such as, spark rate module 212 can be by point
The corresponding amount that the number of fire event rotates divided by bent axle obtains spark rate.Spark rate module 212 exports spark rate.
Biasing generation module 208 can be based on the scope of the selected biasing of spark rate regulation.Such as, connect along with spark rate
The resonant frequency of the vehicle structure between seat, steering wheel and pedal of nearly dynamical system installed part and driver's interactive component-such as,
Biasing generation module 208 can increase this scope.Such as model analysis and/or physical testing can be used to make a reservation for excitation frequency
Rate.
In one example, scope can be increased to from 0 that to have negative lower limit, the positive upper limit and 0 flat by biasing generation module 208
The scope of average.Negative lower limit can equal to the igniting mark or its mark of negative value, and the positive upper limit can equal on the occasion of point
Fire mark or its mark.In various enforcement patterns, biasing generation module 208 can by offset control for equal to relative to
Time or bent axle are rotated between the upper limit and lower limit the sinusoidal signal of change.
In addition to or instead of scope based on spark rate regulation selection biasing, ignition control module 210 can be based on point
Fire frequency determines whether to add biasing to operation summation.Such as, when spark rate is in resonant frequency predetermined of vehicle structure
In the range of time, biasing can be added to operation summation by ignition control module 210.On the contrary, when spark rate is at this preset range
Outside time, biasing can not be added to operation summation by ignition control module 210.
Fuel control module 214 command fuel actuator module 124 provides fuel to the cylinder of engine 102 so that at gas
Cylinder performs ignition event.Spark control module 216 instructs spark actuator module 126 and generates in the cylinder of engine 102
Spark is to perform ignition event in the cylinder.Valve control module 218 instructs valve actuator module 160 and opens entering of cylinder
Gas and exhaust valve are to perform ignition event in the cylinder.
Referring now to Fig. 3, for the spark rate of random regulation engine so that shaking when reducing the cylinder disabling engine
Dynamic method starts at 302.304, described method is based on driver torque request and when all cylinder points of engine
During fire, maximum engine torque output determines igniting mark.Described method is defeated divided by peak torque by driver torque request
Out obtain igniting mark.Described method can control setting based on accelerator pedal position and/or cruise and determine driver
Torque request.
306, described method adds igniting mark to operation summation.When engine initial start, running summation can
To be set as 0.308, described method determines the spark rate of engine.Described method can based on bent axle rotate amount and/
Or the time quantum between ignition event determines spark rate.
310, described method determines biasing range.Described method can regulate this biasing range based on spark rate.Example
As, along with spark rate is close to car between seat, steering wheel and pedal of dynamical system installed part and driver's interactive component-such as
The resonant frequency of structure, described method can increase this biasing range.Such as model analysis and/or physical testing can be used
Determine driving frequency.In one example, biasing range can be increased to have negative lower limit, the positive upper limit from 0 by described method
Scope with 0 mean value.Negative lower limit can be equal to igniting mark or its mark of negative value, and the positive upper limit can be equal to just
The igniting mark of value or its mark.In various enforcement patterns, described method can by offset control for equal to relative to
Time or bent axle are rotated between the upper limit and lower limit the sinusoidal signal of change.
312, described method stochastic generation biases.Such as, described method can randomly choose biasing from this biasing range.
314, biasing is added to operation summation by described method.In various enforcement patterns, when spark rate being total at vehicle structure
Time in the preset range of vibration frequency, biasing can be added to operation summation by described method.On the contrary, when spark rate is at predetermined model
Time outside enclosing, biasing can not be added to operation summation by described method.
316, described method determines that whether operation summation is more than or equal to 1.If running summation to be more than or equal to 1, that
Described method continues at 318.Otherwise, described method continues at 304.318, described method is in the igniting time of engine
The next cylinder of sequence performs ignition event.
320, described method deducts this biasing from running summation.About this point, described method can be only temporary transient at 314
Biasing is added to operation summation by ground, and make at 316 subsequently determine after deduct biasing from running summation.Total from running
Can be by described method to (such as, one or more complete at bent axle during sufficiently long a string cylinder events with deducting biasing
During whole rotation) average igniting mark or the impact of spark rate minimize or eliminate.In turn, driver is possible will not
Experience the change of the moment of torsion output that the average change lighting a fire mark or spark rate causes.
In various enforcement patterns, described method can not deduct biasing (such as, 320 can omit) from running summation.
In these implement pattern, the mean value adding the biasing running summation to can be 0.Therefore, described method may be to enough
Average igniting mark or spark rate during long a string cylinder events do not affect.
322, described method from run summation deduct 1 and 304 at continue.For each cylinder events (such as, often
Secondary bent axle rotates through predetermined angular), described method can complete the iteration controlling circulation of Fig. 3.Therefore, described method can
Then assess with a cylinder cylinder and/or regulate igniting mark.
Description above is substantially merely exemplary, is in no way intended to limit invention, its application, or uses.The present invention
Broad teachings can implement in a variety of forms.Therefore, although the present invention includes particular example, the true scope of the present invention does not answer office
Being limited to these examples, because after studying accompanying drawing, specification and appended book, other remodeling will become aobvious
And be clear to.As used herein, phrase " at least one in A, B and C " should be interpreted to mean logic (A or B or C), and it makes
Use nonexcludability logical "or".It should be appreciated that in the case of the principle not changing the present invention, or many in method
Individual step can (or) perform in a different order simultaneously.
In the present invention, including following definition, term module can replace with term circuit.Term module is gratifying
Refer to, include or the part of the following: special IC (ASIC)；Numeral, simulation or analog/digital hybrid are discrete
Circuit；Numeral, simulation or analog/digital hybrid integrated circuit；Combinational logic circuit；Field programmable gate array (FPGA)；Perform
The processor (shared, special or group) of coding；The memory of the coding that storage processor performs is (shared, special
Or group)；Other suitable hardware of described function are provided；Or the combination of part above or all parts-such as system
Level chip.
As used above, term " encodes " and can include software, firmware and/or microcoding, and can refer to program, point journey
Sequence, function, class and/or object.The processor that term is shared includes performing some or the list of all codings from multiple modules
Individual processor.Term group processor includes performing some or institute from one or more modules with additional processor combination
There is the processor of coding.The memory that term is shared includes storing some or the single storage of all codings from multiple modules
Device.Term group memory includes storing some or all codings from one or more modules with extra memory combination
Memory.Term memory can be the subclass of term computer-readable medium.Term computer-readable medium does not include passing
Turn on interim electricity and the electromagnetic signal of medium, and be therefore considered entity and non-provisional.Non-provisional entity meter
The non-limiting example of calculation machine computer-readable recording medium includes nonvolatile storage, volatile memory, magnetic storage and optical memory.
The apparatus and method described in this application can partially or completely be implemented by one or more computer programs, institute
State computer program to be performed by one or more processors.Computer program includes the instruction that can be performed by processor, described can
The instruction performed by processor is stored at least one non-provisional entity computer computer-readable recording medium.Computer program may also include
And/or rely on the data of storage.
Claims (20)
1. random regulation engine firing frequencies reduces a system for vibration, including:
Igniting mark module, described igniting mark module determines igniting mark based on driver torque request；
The biasing generation module of stochastic generation biasing；And
Ignition control module, its:
Igniting mark is added to operation summation when bent axle at each engine rotates through predetermined angular；
Biasing is added to operation summation；And
In the cylinder of engine, ignition event is performed when running summation more than or equal to predetermined value.
2. the system as claimed in claim 1, described igniting mark is set equal to drive by wherein said igniting mark module
The ratio of the moment of torsion output of engine when member's torque request and each cylinder in activating engine.
3. the system as claimed in claim 1, wherein determine described operation summation whether more than or equal to described predetermined value it
Rear described ignition control module deducts biasing from described operation summation.
4. the system as claimed in claim 1, wherein said ignition control module is performing after described ignition event from described
Run summation and deduct predetermined value.
5. the system as claimed in claim 1, farther includes spark rate module, and described spark rate module is based on igniting thing
The amount that bent axle between part rotates determines the spark rate of engine.
6. the system as claimed in claim 1, the most each described bent axle rotates through described ignition control module during predetermined angular
Biasing is added to operation summation.
7. system as claimed in claim 6, wherein when the spark rate of engine is in resonant frequency predetermined of vehicle structure
In the range of time described ignition control module biasing is added to operation summation.
8. the system as claimed in claim 1, wherein said biasing generation module selects in the biasing range that mean value is 0 at random
Select biasing.
9. system as claimed in claim 8, wherein between the spark rate and the resonant frequency of vehicle structure of engine
When difference reduces, described biasing generation module increases this biasing range.
10. system as claimed in claim 8, wherein when the spark rate of engine is in resonant frequency predetermined of vehicle structure
In the range of time described biasing generation module make this biasing range increase to non-zero value from 0.
The method that 11. 1 kinds of random regulation engine firing frequencies reduce vibration, including:
Igniting mark is determined based on driver torque request；
Stochastic generation biases；
The bent axle of engine adds described igniting mark to operation summation when rotating through predetermined angular every time；
Described biasing is added to described operation summation；And
In the cylinder of engine, ignition event is performed when described operation summation is more than or equal to predetermined value.
12. methods as claimed in claim 11, farther including that described igniting mark is set equal to operator torque please
Seek the ratio of moment of torsion output with the engine when activating each cylinder in engine.
13. methods as claimed in claim 11, further include at and determine that whether described operation summation is more than or equal to described
Described biasing is deducted from described operation summation after predetermined value.
14. methods as claimed in claim 11, further include at execution described ignition event after from described operation summation
Deduct predetermined value.
15. methods as claimed in claim 11, farther include to determine based on the amount that bent axle between ignition event rotates and send out
The spark rate of motivation.
16. methods as claimed in claim 11, farther include when each described bent axle rotates through predetermined angular by described partially
Put and add described operation summation to.
17. methods as claimed in claim 16, farther include when engine spark rate vehicle structure resonance frequency
Time in the preset range of rate, described biasing is added to described operation summation.
18. methods as claimed in claim 11, farther include to randomly choose in the biasing range that mean value is 0 described partially
Put.
19. methods as claimed in claim 18, farther include the resonance frequency of the spark rate when engine and vehicle structure
Difference between rate increases described biasing range when reducing.
20. methods as claimed in claim 18, farther include when engine spark rate vehicle structure resonance frequency
Described biasing range is made to increase to non-zero value from 0 time in the preset range of rate.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361749510P | 2013-01-07 | 2013-01-07 | |
| US61/749510 | 2013-01-07 | ||
| US61/749,510 | 2013-01-07 | ||
| US13/798775 | 2013-03-13 | ||
| US13/798,775 | 2013-03-13 | ||
| US13/798,775 US9650978B2 (en) | 2013-01-07 | 2013-03-13 | System and method for randomly adjusting a firing frequency of an engine to reduce vibration when cylinders of the engine are deactivated |
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| Publication Number | Publication Date |
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| CN103912432A CN103912432A (en) | 2014-07-09 |
| CN103912432B true CN103912432B (en) | 2016-08-24 |
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| CN201410006191.2A Active CN103912432B (en) | 2013-01-07 | 2014-01-07 | Random regulation engine firing frequencies reduces the system and method for vibration |
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| DE (1) | DE102013114956B4 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016048714A1 (en) * | 2014-09-22 | 2016-03-31 | Tula Technology, Inc. | Skip fire transition control |
| CN110785552B (en) * | 2017-06-20 | 2022-09-13 | 伊顿智能动力有限公司 | Skip-cylinder deactivation mode for avoiding engine resonance |
| US11371450B2 (en) | 2018-06-07 | 2022-06-28 | Eaton Intelligent Power Limited | NVH management in diesel CDA modes |
| WO2021035215A1 (en) | 2019-08-22 | 2021-02-25 | Purdue Research Foundation | Method for dynamically determining a firing pattern for an engine with dynamic cylinder activation |
| CN111608813B (en) * | 2020-05-22 | 2022-09-30 | 一汽解放汽车有限公司 | Engine exhaust temperature management method and device and engine |
| CN116066250B (en) * | 2023-02-15 | 2024-06-04 | 一汽解放汽车有限公司 | Ignition mode control method, device, controller and storage medium |
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| CN103912432A (en) | 2014-07-09 |
| DE102013114956A1 (en) | 2014-07-10 |
| DE102013114956B4 (en) | 2020-06-18 |
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