CN106837565A - Internal combustion engine intelligent power distribution system - Google Patents
Internal combustion engine intelligent power distribution system Download PDFInfo
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- CN106837565A CN106837565A CN201710056461.4A CN201710056461A CN106837565A CN 106837565 A CN106837565 A CN 106837565A CN 201710056461 A CN201710056461 A CN 201710056461A CN 106837565 A CN106837565 A CN 106837565A
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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
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/02—Cutting-out
Abstract
The invention provides a kind of internal combustion engine intelligent power distribution system, including engine demand torque arithmetic module, single cylinder optimum workability evaluation module, engine working mode determining module, not cylinder deactivation order determining module, working cylinder control module, working cylinder control module and control parameters of engine adjusting module.Engine demand torque arithmetic module calculates the operation torque value to engine calls；Single cylinder optimum workability evaluation module calculates the number of cylinders that is stopped under current working, the ability to work of working cylinder is in optimum state；Not intake and exhaust action of the working cylinder control module to not working cylinder is controlled, and not working cylinder is done negative work and reaches minimum；Working cylinder control module is modified to the distributive value of working cylinder, air inflow, the vibration of engine and noise is reached minimum.The present invention determines the mode of operation of engine according to engine operation condition, engine is operated in most economical working region, reaches the purpose of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of internal combustion engine intelligent power distribution system, it is related to diesel energy conservation and emissions reduction technical field.
Background technology
Chinese patent CN101858259B provides a kind of control method for the cylinder deactivation fuel-economizing of diesel engine part.The patent
The technological means taken and reach effect and be：One cylinder deactivation controller, cylinder deactivation controller are set outside engine electric-controlled unit
Engine and whole vehicle information are obtained by CAN from engine electric-controlled unit, automatic identification whole vehicle state is carried out as needed
Part cylinder deactivation fuel-saving control；The corresponding cylinder deactivation area three-dimensional MAP of rotating speed, throttle, moment of torsion is prestored in cylinder deactivation controller,
When detecting that engine runs to cylinder deactivation region, into deactivation mode, under deactivation mode, diesel engine half cylinder stops spray
Oil, second half cylinder operation, and alternation；The cylinder deactivation oil-break order of cylinder deactivation controller is to control engine to control by message
Unit forces cylinder deactivation；Cylinder deactivation fuel-saving control when realizing diesel-oil whole sub-load by above-mentioned technological means, reaches vehicle fuel-economizing
Purpose.The patent deficiency and reason be：The patent is only capable of realizing the oil-break order to cylinder, for the cylinder of oil-break, exists
Intake and exhaust are lost, and the oil-saving effect not obvious and uneven situation of thermic load occurs on general effect；The patent is in cylinder deactivation mould
Under formula, diesel engine half cylinder does not work, half cylinder operation, for the less engine of cylinder number, can only be in zonule
Deactivation mode can be realized, the range of application of deactivation mode is limited.
Chinese patent CN101532436B provides the diesel engine cylinder deactivation fuel-economizing of a kind of double pressure charging systems of band and pressure relief device
System.Technological means that the patent is taken and reach effect and be：Two completely self-contained pressure charging systems are set, while according to ignition
Multi-cylinder diesel engine cylinder is divided into two groups by order, and an independent pressure charging system is connected respectively, while a set of pressure relief device is set,
Same group of cylinder connection of pressure relief device；In high load capacity, two groups of cylinder normal oil spouts during in underload, connect pressure relief device
Cylinder stop oil spout, its corresponding booster is in idling conditions, will not produce influence to another group of booster working condition,
High pressure is laid down by pressure relief device, the frictional resistance of not working cylinder is reduced, so as to improve diesel engine in low- load conditions
Mechanical efficiency.The patent deficiency and reason be：It is forever fixed one when engine enters cylinder deactivation fuel-economizing working condition
Group cylinder operation, another group of cylinder does not work, and can so cause two groups of cylinder operation times uneven, in the normal mode, meeting
There is diesel engine work non-uniform phenomenon；Because the working cylinder of pressure relief device connection is fixed, therefore cylinder deactivation section ought be needed
When oily, a kind of deactivation mode is can be only in, it is impossible to be adjusted flexibly according to engine load, so as to limit cylinder deactivation fuel-economizing mould
The working range of formula；Complicated in mechanical structure, the structure of modification to available engine is big, causes integrated cost high.
Chinese patent CN102817722B subtracts cylinder control load method there is provided a kind of diesel engine.The technology that the patent is taken
Means and reach effect and be：The photoelectric encoder that tests the speed is installed in diesel engine free end, a pair of torsional oscillations are installed at engine load end
Photoelectric encoder, produces in the cylinder detonation pressure of diesel engine and install Double direct acceleration sensor near point；Stop one by one in order
Cylinder, records torsional oscillation and vibration data, according to torsional oscillation ratio and vibration ratio and be minimum principle, it is determined that under part load
Cylinder deactivation number, operationally subtract as diesel engine cylinder control load foundation.The patent deficiency and reason be：In selection cylinder deactivation
When, the factor of torsional oscillation and vibration is only only accounted for, do not account for the influence to the uniformity that works such as cylinder operation time, abrasion.
In general, when engine is in underload, just selection stops a part of cylinder operation, does not have in existing technology
It is provided with how being in low load condition come engine evaluated by specific quantizating index in real time in engine control system,
The control method that working cylinder working time, abrasion etc. influence on working cylinder service behaviour is not provided yet, and is being stopped
When partial cylinders work, the control method of working cylinder work uniformity.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of internal combustion engine intelligent power distribution system
System, the mode of operation of engine is determined according to engine operation condition, engine is operated in most economical working region, reaches section
The purpose of energy emission reduction.Engine involved in the present invention each means internal combustion engine.
According to the technical scheme that the present invention is provided, described internal combustion engine intelligent power distribution system is turned round including engine demand
Square computing module, single cylinder optimum workability evaluation module, engine working mode determining module, cylinder deactivation order determining module,
Not working cylinder control module, working cylinder control module and control parameters of engine adjusting module；
The engine demand torque arithmetic module is used for calculating driver, ECU, vehicle accessory, engine on vehicle
The demand torque of annex, and comprehensively form the final operation torque value to engine calls；
The single cylinder optimum workability evaluation module is used for calculating the number of cylinders that is stopped under current working, enables to work
The ability to work for making cylinder is in optimum state；
The engine working mode determining module is used for determining that engine operates in normal mode of operation or cylinder deactivation work mould
Formula；
The cylinder deactivation order determining module is used for determining cylinder deactivation sequentially；
The not working cylinder control module is used for being controlled the intake and exhaust of not working cylinder action so that not working cylinder
Done negative work reaches minimum；
The working cylinder control module is used for being modified the distributive value of working cylinder, air inflow so that engine shakes
Dynamic and noise reaches minimum；
The control parameters of engine adjusting module is used for determining running parameter of the engine under normal, cylinder deactivation work pattern.
Specifically, in the engine demand torque arithmetic module, the demand torque of driver is passed according to different vehicles
The type of dynamic system, is obtained by different calculations：If what vehicle transmission system was installed is manual transmission, operator demand
Moment of torsion is inquired about operator demand's moment of torsion MAP and is obtained by gas pedal aperture and engine speed, if vehicle transmission system is installed
Be automatic gear-box, then inquiring about operator demand MAP by gas pedal and speed obtains.
In the engine demand torque arithmetic module, the ECU on vehicle includes：Automatic gear-box control unit,
One or more in Vehicle Stability System control unit, power-assisted steering control unit, these control units are sent out by CAN
The moment of torsion of demand is sent to give engine demand torque arithmetic module.
In the engine demand torque arithmetic module, obtain vehicle accessory beforehand through experiment and engine accessory power rating runs
When demand torque, in systems, engine demand torque arithmetic module is calculated according to vehicle and engine operation condition for storage
The demand torque of vehicle accessory and engine accessory power rating to engine.
The single cylinder optimum workability evaluation module is used for being come according to engine test bench characteristic, particularly oil consumption universal characteristic
It is determined that existing including air inflow, distributive value, mean effective pressure in the engine most economical single working cylinder in conditioned area of work
Interior optimum working parameter, and calculate and be stopped under current working number of cylinders, enable to the single cylinder in working cylinder
Air inflow, distributive value, mean effective pressure be in optimum working parameter in the range of.
The engine working mode determining module considers engine demand moment of torsion and accounts for engine test bench characteristic output torsion
The ratio of square, engine current operating environment, single cylinder optimum workability assessment result, determine that engine operates in normal work
Pattern or cylinder deactivation work pattern；When engine speed is less than limit value, and engine demand moment of torsion and engine test bench characteristic output
When the ratio of moment of torsion is less than limit value, control engine is switched to cylinder deactivation work pattern from normal mode of operation, optimal by single cylinder
The assessment result of ability to work determines the number of cylinders being stopped.
The cylinder deactivation order determining module is each according to the output result of engine working mode determining module, and engine
The working time of individual cylinder determines cylinder deactivation sequentially, it is ensured that the uniformity of each cylinder operation；For each cylinder sets
A service factor is put, service factor is the function of cylinder operation time, when cylinder operation, its corresponding service factor starts
Cumulative, cumulative step-length determines according to engine working mode every time：When engine is in normal mode of operation, job family
Number step-length is a standard volume, and when in cylinder deactivation work pattern, the service factor step-length of the cylinder that is stopped is zero, work gas
The service factor step-length of cylinder is that standard volume adds accumulation amount, and the number of cylinders being stopped is more, then accumulation amount is bigger；Work as engine
When switching into deactivation mode from normal mode of operation, the big cylinder of cylinder deactivation order determining module selection service factor is used as stopping
The cylinder of work.
The not working cylinder control module opens exhaust valve while oil spout is stopped in compression travel start time,
The a certain moment closes exhaust valve in compression travel, being stopped period thereafter, and inlet and exhaust valve, member-retaining portion are closed always
Fresh air is in cylinder；The position of closing exhaust valve in negative work minimum principle selection compression travel is done according to not working cylinder
Put.
The corresponding transient speed of the working cylinder control module collecting work cylinder, and mean speed is calculated, will be instantaneous
Rotating speed is filtered treatment with the difference of mean speed, retains rhythm of engine correspondence fluctuation of speed component, according to work
The fluctuation of speed component difference of cylinder, distributive value, advance angle, air inflow to working cylinder carry out feedback modifiers, so that
The vibration of engine and noise reach minimum.
The control parameters of engine adjusting module determines to include starting according to mode of operation and the cylinder deactivation order of engine
Machine efficiency of combustion, advance angle, pre- distributive value, rail pipe pressure are in interior control parameter so that while engine consumption is minimum, protect
Demonstrate,prove the noxious gas emission and vibrating noise being optimal value of engine.
It is an advantage of the invention that：The internal combustion engine intelligent power distribution system that the present invention is provided can be such that engine is operated in most
While economic zone, it is ensured that the noxious gas emission and vibrating noise being optimal value of engine.
1. the present invention calculates the requirement of driver, other ECUs, vehicle accessory and engine accessory power rating to engine and turns round
Square, engine torque as requested and engine test bench characteristic output torque ratio determine whether engine enters cylinder deactivation work
Pattern.
2. the present invention determines single working cylinder optimum workability according to oil consumption universal characteristic etc., so that it is determined that stopping
The number of cylinders of work.
3. the present invention establishes the service factor of the working cylinder based on the working time, according to the job family of each cylinder
Number determines cylinder deactivation scheme.
4. the present invention carries out feedback modifiers to control parameter according to the transient speed of working cylinder, reduces vibration and noise.
Brief description of the drawings
Fig. 1 is intelligent power distribution system configuration figure.
Fig. 2 is engine demand torque arithmetic schematic diagram.
Fig. 3 is that have characteristic schematic diagram outside engine consumption.
Fig. 4 is engine working mode distributed areas schematic diagram.
Fig. 5 is that single working cylinder service factor calculates schematic diagram.
Fig. 6 is not working cylinder negative work curve synoptic diagram in embodiments of the invention.
Fig. 7 is working cylinder transient speed schematic diagram in embodiments of the invention.
Fig. 8 is control parameters of engine switching schematic diagram in the embodiment of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, internal combustion engine intelligent power distribution system (Intelligent Power of the present invention
Distribution System, abridge IPDS) include：Engine demand torque arithmetic module 1, single cylinder optimum workability is commented
Estimate module 2, engine working mode determining module 3, not cylinder deactivation order determining module 4, working cylinder control module 5, work gas
Cylinder control module 6 and control parameters of engine adjusting module 7.
Described engine demand torque arithmetic module 1 is used for calculating driver, the ECU on vehicle（For example it is automatic
Gear box control unit, Vehicle Stability System control unit, power-assisted steering control unit）, vehicle accessory, engine accessory power rating etc.
Demand torque, and comprehensively form the final operation torque value to engine calls.Wherein, the demand torque of driver is not according to
The type of same vehicle transmission system, is obtained by different calculations：If what vehicle transmission system was installed is manual transmission,
Operator demand's moment of torsion is inquired about operator demand's moment of torsion MAP and is obtained by gas pedal aperture and engine speed, if vehicle
What power train was installed is automatic gear-box, then inquiring about operator demand MAP by gas pedal and speed obtains.On the vehicle
ECU respectively by CAN send demand moment of torsion to engine demand torque arithmetic module 1.Beforehand through experiment
Demand torque when vehicle accessory (such as air-conditioning) and engine accessory power rating (such as high pressure fuel pump) operation is obtained, is stored in IPDS
In, engine demand torque arithmetic module 1 calculates vehicle accessory and engine accessory power rating pair according to vehicle and engine operation condition
The demand torque of engine.Finally, engine demand torque arithmetic module 1 synthesizes and coordinates above-mentioned various torque demands, is formed most
The operation torque value of whole engine calls.
Described single cylinder optimum workability evaluation module 2 is used for according to the universal spy of engine test bench characteristic, particularly oil consumption
Property come air inflow, distributive value, mean effective pressure of the most economical single working cylinder in conditioned area of determining to be worked in engine etc.
Optimum working parameter, and calculate and be stopped under current working number of cylinders, enable to entering for the single cylinder in working cylinder
Tolerance, distributive value, mean effective pressure are in the range of optimum working parameter.
Described engine working mode determining module 3 accounts for engine test bench characteristic for considering engine demand moment of torsion
Ratio, engine current operating environment, single cylinder optimum workability assessment result of output torque etc., determine that engine is operated in
Normal mode of operation or cylinder deactivation work pattern.When engine speed is less than outside limit value, and engine demand moment of torsion and engine
When the ratio of characteristic output torque is less than limit value, engine working mode determining module 3 controls engine from normal mode of operation
Cylinder deactivation work pattern is switched to, the number of cylinders for determining to be stopped by the assessment result of single cylinder optimum workability.
Described cylinder deactivation order determining module 4 is used for the output result according to engine working mode determining module, and
The working time of engine each cylinder determines cylinder deactivation sequentially, it is ensured that the uniformity of each cylinder operation.For each starts
Machine cylinder sets a service factor, and service factor is the function of cylinder operation time, when cylinder operation, its corresponding work
Coefficient starts to add up, and cumulative step-length determines according to engine working mode every time：When engine is in normal mode of operation
When, service factor step-length is a standard volume；When in cylinder deactivation work pattern, the service factor step-length of the cylinder that is stopped is
Zero, the service factor step-length of working cylinder is that standard volume adds accumulation amount, and the number of cylinders being stopped is more, then accumulation amount is got over
Greatly.When engine switches into deactivation mode from normal mode of operation, the selection service factor of cylinder deactivation order determining module 4 is big
Cylinder is used as the cylinder being stopped.
Described not working cylinder control module 5 is opened in compression travel start time and is vented while oil spout is stopped
Door, a certain moment closes exhaust valve in compression travel, being stopped period thereafter, and inlet and exhaust valve is closed always, retains
Part fresh air is in cylinder.Exhaust valve is closed in doing negative work minimum principle selection compression travel according to not working cylinder
Position.
The described corresponding transient speed of the collecting work cylinder of working cylinder control module 6, and mean speed is calculated, by wink
When rotating speed and mean speed difference be filtered treatment, retain the rhythm of engine correspondingly fluctuation of speed component, according to work
Making the fluctuation of speed component difference of cylinder, distributive value, advance angle, air inflow to working cylinder etc. carries out feedback modifiers, so that
So that the vibration of engine and noise reach minimum.
Described adjustment control parameters of engine module 7 is used for determining hair according to mode of operation and the cylinder deactivation order of engine
The control parameters such as motivation efficiency of combustion, advance angle, pre- distributive value, rail pipe pressure, while the engine consumption for making is minimum, it is ensured that
The noxious gas emission and vibrating noise being optimal value of engine.
Fig. 2 is engine demand torque arithmetic schematic diagram.Engine demand torque arithmetic module of the present invention 1 is comprehensive
Consider the operation torque value to engine calls such as driver, ECU, vehicle accessory, engine accessory power rating on vehicle.
When calculating operator demand's moment of torsion 202, using accelerator pedal position 201 an as input variable, while by engine speed or
Person's speed is as another input variable, the principle of selection：If what vehicle transmission system was installed is manual transmission, will
Engine speed is inquired about by gas pedal aperture and engine speed and driven as input variable, now operator demand's moment of torsion
Member demand torque MAP is obtained；If what vehicle transmission system was installed is automatic gear-box, speed is chosen as input variable, this
When operator demand's moment of torsion operator demand MAP inquired about by gas pedal aperture and speed obtain.The demand of cruise control is turned round
The demand torque 204 and operator demand's moment of torsion 202 of square 203, power takeoff take maximum in being operated 205.Its on vehicle
His ECU, such as automatic gear-box control unit, Vehicle Stability System control unit, power-assisted steering control unit etc. are to hair
The demand torque 207 of motivation is sent to intelligent power distribution system IPDS by CAN.Engine demand torque arithmetic module
Other ECUs in 1 output results and vehicle in 206 operations according to the operation of the running status of engine comprehensive coordination 205
Demand torque, add vehicle accessory moment of torsion 208 in output coordinating result to 209 operations, output results in 211 operations again
Coordinated with engine idle speed adjustment moment of torsion 210, output result protects torque limit 212 in being operated 213 by engine
Obtain final engine demand moment of torsion.
Fig. 3 is that have characteristic schematic diagram outside engine consumption, and every curve is to wait for oil consumption line in figure, the numeral expression on curve
Specific fuel consumption, unit is g/kW.h.Consumption minimization is 200g/kW.h in Fig. 3, corresponding to wait oil consumption line and external characteristic curve to constitute
The most economical working region of engine, the air inflow of the single working cylinder being operated in by experiment acquisition engine in the region,
The optimum working parameters such as distributive value, mean effective pressure.
Fig. 4 is engine working mode distributed areas schematic diagram.First, intelligent power distribution system is according to engine demand
The ratio and engine running speed of moment of torsion and engine test bench characteristic output torque determine whether engine enters cylinder deactivation work
Pattern.In order to ensure enough engine power output, only in engine demand moment of torsion and engine test bench characteristic output torque
Ratio be less than a threshold value, and engine speed is when being less than a threshold value, just allows engine into cylinder deactivation work pattern.
In one embodiment of the present of invention, engine 401 region normal works in fig. 4, and cylinder deactivation work pattern is not allowed access into.
Secondly, be stopped number of cylinders under intelligent power distribution system calculating current working, enables to the single gas in working cylinder
The air inflow of cylinder, distributive value, mean effective pressure are in the range of optimum working parameter.In an embodiment of the present invention, in Fig. 4
The cylinder deactivation rate in 402,403,404 regions be respectively 20%, 25% and 33%.
Fig. 5 is that single working cylinder service factor calculates schematic diagram.Figure includes first selector 506 and second selector
509, when gas cylinder working condition 507 is that when not working, second selector 509 selects service factor step-length 508 as output step-length,
In general service factor step-length 508 is zero；When gas cylinder working condition 507 is work, then the output of selection 506 is used as output
Step-length.When the cylinder deactivation rate of engine is different, i.e., engine work different zones in fig. 4 when, the job family of working cylinder
Number step-length is inconsistent, and basic principle is：Cylinder deactivation rate is bigger, and the service factor step-length of working cylinder is bigger.
The service factor step-length of working cylinder is determined according to the different working region of engine in Fig. 4, with of the invention
One embodiment is used as explanation:
When the cylinder deactivation rate 501 of engine is 0%, i.e., engine work in fig. 4 401 region when, first selector 506 is selected
First service factor step-length 502 is 1 as output, the in general value of the first service factor step-length 502；
When cylinder deactivation of engine rate 501 is 20%, i.e., engine work in fig. 4 402 region when, first selector 506 is selected
Used as output, in one embodiment of the invention, the value of the second service factor step-length 503 is second service factor step-length 503
1.05；
When cylinder deactivation of engine rate 501 is 25%, i.e., engine work in fig. 4 403 region when, first selector 506 is selected
Used as output, in one embodiment of the invention, the value of the 3rd service factor step-length 504 is 3rd service factor step-length 504
1.15；
When cylinder deactivation of engine rate 501 is 33%, i.e., engine work in fig. 4 404 region when, first selector 506 is selected
Used as output, in one embodiment of the invention, the value of the 4th service factor step-length 505 is 4th service factor step-length 505
1.3。
The output of second selector 509 characterizes the service factor step-length of single working cylinder, and the gas is neutralized in adder 510
A preceding calculated value 511 of cylinder working coefficient is added the service factor 512 for obtaining the current cylinder.When engine from normal work
When pattern switching enters deactivation mode, the cylinder deactivation order determining module of intelligent power distribution system selects the big cylinder of service factor
As the cylinder being stopped.
The not working cylinder control module 5 of intelligent power distribution system starts while oil spout is stopped in compression travel
Moment opens exhaust valve, and a certain moment closes exhaust valve in compression travel, during being stopped thereafter, close always into
Exhaust valve, member-retaining portion fresh air is in cylinder.Fig. 6 is that working cylinder negative work curve does not show in one embodiment of the present of invention
It is intended to, abscissa is the position that exhaust valve is closed in compression travel, ordinate represents in a working cycles not working cylinder
The negative work done.From fig. 6 it can be seen that closing exhaust valve when compression travel continues 80CA, working cylinder does not do negative work
It is minimum.Exhaust valve is closed after this, can increase the negative work of cylinder generation on the contrary due to the pumping loss that pump gas are caused.According to not work
Make the position that cylinder makees closing exhaust valve in negative work minimum principle selection compression travel.
Fig. 7 is working cylinder transient speed schematic diagram in one embodiment of the present of invention, as can be seen from the figure when starting
When machine enters cylinder deactivation work pattern, the amplitude of the corresponding transient speed of working cylinder can increase, and working cylinder is not corresponding instantaneous
The amplitude of rotating speed can reduce, while the degree of irregularity of the transient speed between working cylinder can increase, can aggravate shaking for engine
Dynamic and noise.The corresponding transient speed of intelligent power distribution system working cylinder control module collecting work cylinder, and calculate flat
Equal rotating speed, treatment is filtered by the difference of transient speed and mean speed, retains the rhythm of engine correspondence fluctuation of speed
Component, the fluctuation of speed component difference according to working cylinder, distributive value, advance angle, air inflow to working cylinder etc. are carried out instead
Feedback amendment, so that the vibration of engine and noise reach minimum.
When the different working region in Fig. 4 of engine work, it is necessary to adjust efficiency of combustion, advance angle, pre- oil spout
The control parameters of engine such as amount, rail pipe pressure, while could causing that engine consumption is minimum, it is ensured that the pernicious gas of engine
Discharge and vibrating noise being optimal value.Fig. 8 is one control parameter switching signal of engine in one embodiment of the invention
Figure, when the cylinder deactivation rate 501 of engine is respectively 0%, 20%, 25% and 33%, i.e., engine work respectively in fig. 4 401,
402nd, 403 and during 404 region, third selector 805 selects control parameter 801,802,803 and 804 as output respectively.Work as hair
Motivation mode of operation switches, when the control parameter difference of different working modes is larger, if hardness switching can cause to start
Machine job insecurity, therefore ramp treatment is carried out to control parameter in 806 operations, it is ensured that seamlessly transit, finally give and start
The actual control parameter 807 of machine.
In sum, the method have the characteristics that：
1. driver, the requirement moment of torsion of other ECUs, vehicle accessory and engine accessory power rating to engine on vehicle are calculated,
Engine torque as requested and engine test bench characteristic output torque ratio determine whether engine enters cylinder deactivation work mould
Formula.
2. single working cylinder optimum workability is determined according to oil consumption universal characteristic etc., so that it is determined that be stopped
Number of cylinders.
3. the service factor of the working cylinder based on the working time is established, and the service factor according to each cylinder determines
Cylinder deactivation scheme.
4. the transient speed according to working cylinder carries out feedback modifiers to control parameter, reduces vibration and noise.
Claims (10)
1. internal combustion engine intelligent power distribution system, it is characterised in that：Including engine demand torque arithmetic module（1）, single cylinder most
Good Evaluation On Ability module（2）, engine working mode determining module（3）, cylinder deactivation order determining module（4）, not work gas
Cylinder control module（5）, working cylinder control module（6）And control parameters of engine adjusting module（7）；
The engine demand torque arithmetic module（1）For calculating driver, ECU, vehicle accessory, hair on vehicle
The demand torque of motivation annex, and comprehensively form the final operation torque value to engine calls；
The single cylinder optimum workability evaluation module（2）For calculating the number of cylinders that is stopped under current working, can make
The ability to work for obtaining working cylinder is in optimum state；
The engine working mode determining module（3）For determining that engine operates in normal mode of operation or cylinder deactivation work
Pattern；
The cylinder deactivation order determining module（4）For determining cylinder deactivation sequentially；
The not working cylinder control module（5）It is controlled for the intake and exhaust action to not working cylinder so that do not work
Cylinder does negative work and reaches minimum；
The working cylinder control module（6）It is modified for the distributive value to working cylinder, air inflow so that engine
Vibration and noise reach minimum；
The control parameters of engine adjusting module（7）For determining work ginseng of the engine under normal, cylinder deactivation work pattern
Number.
2. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the engine demand torque arithmetic
Module（1）In, the demand torque of driver is obtained according to the type of different vehicle transmission systems by different calculations：
If what vehicle transmission system was installed is manual transmission, operator demand's moment of torsion is looked into by gas pedal aperture and engine speed
Ask operator demand's moment of torsion MAP to obtain, if vehicle transmission system installation is automatic gear-box, by gas pedal and speed
Inquiry operator demand MAP is obtained.
3. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the engine demand torque arithmetic
Module（1）In, the ECU on the vehicle includes：Automatic gear-box control unit, Vehicle Stability System control unit, help
One or more in power turning control cell, these control units are needed by the moment of torsion that CAN sends demand to engine
Seek torque arithmetic module（1）.
4. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the engine demand torque arithmetic
Module（1）In, demand torque when obtaining vehicle accessory and engine accessory power rating operation beforehand through experiment is stored in systems,
Engine demand torque arithmetic module（1）Vehicle accessory and engine accessory power rating are calculated to hair according to vehicle and engine operation condition
The demand torque of motivation.
5. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the single cylinder optimum workability is commented
Estimate module（2）For being determined according to engine test bench characteristic, particularly oil consumption universal characteristic in the engine most economical operating mode of work
The single working cylinder in region including the optimum working parameter including air inflow, distributive value, mean effective pressure, and calculate current
Be stopped number of cylinders under operating mode, enables to air inflow, distributive value, the mean effective pressure of the single cylinder in working cylinder
In the range of optimum working parameter.
6. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the engine working mode determines
Module（3）Consider engine demand moment of torsion account for the ratio of engine test bench characteristic output torque, engine current operating environment,
Single cylinder optimum workability assessment result, determines that engine operates in normal mode of operation or cylinder deactivation work pattern；When starting
Machine rotating speed be less than limit value, and engine demand moment of torsion and engine test bench characteristic output torque ratio be less than limit value when, control hair
Motivation is switched to cylinder deactivation work pattern from normal mode of operation, determines to stop work by the assessment result of single cylinder optimum workability
The number of cylinders of work.
7. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the cylinder deactivation order determining module
（4）According to engine working mode determining module（3）Output result, and the working time of engine each cylinder determine
Cylinder deactivation is sequentially, it is ensured that the uniformity of each cylinder operation；For each cylinder sets a service factor, service factor
The function of cylinder operation time, when cylinder operation, its corresponding service factor starts to add up, every time cumulative step-length according to
Engine working mode determines：When engine is in normal mode of operation, service factor step-length is a standard volume, works as place
When cylinder deactivation work pattern, the service factor step-length of the cylinder that is stopped is zero, and the service factor step-length of working cylinder is standard
Amount adds accumulation amount, and the number of cylinders being stopped is more, then accumulation amount is bigger；When engine is switched into from normal mode of operation
During deactivation mode, cylinder deactivation order determining module（4）The big cylinder of selection service factor is used as the cylinder being stopped.
8. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the not working cylinder control module
（5）While oil spout is stopped, exhaust valve is opened in compression travel start time, a certain moment closes exhaust in compression travel
Door, being stopped period thereafter, closes inlet and exhaust valve always, and member-retaining portion fresh air is in cylinder；According to not working
Cylinder does the position of closing exhaust valve in negative work minimum principle selection compression travel.
9. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the working cylinder control module
（6）The corresponding transient speed of collecting work cylinder, and mean speed is calculated, transient speed is filtered with the difference of mean speed
Ripple treatment, retains rhythm of engine correspondence fluctuation of speed component, the fluctuation of speed component difference according to working cylinder, to work
Making the distributive value of cylinder, advance angle, air inflow carries out feedback modifiers, so that the vibration of engine and noise reach minimum.
10. internal combustion engine intelligent power distribution system as claimed in claim 1, it is characterized in that, the control parameters of engine is adjusted
Mould preparation block（7）Mode of operation and cylinder deactivation order according to engine determines to include engine combustion efficiency, advance angle, pre- oil spout
Amount, rail pipe pressure is in interior control parameter so that while engine consumption is minimum, it is ensured that the noxious gas emission of engine and
Vibrating noise being optimal value.
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