CN203769966U - Mechanically-supercharged explosive motor - Google Patents
Mechanically-supercharged explosive motor Download PDFInfo
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- CN203769966U CN203769966U CN201320637569.XU CN201320637569U CN203769966U CN 203769966 U CN203769966 U CN 203769966U CN 201320637569 U CN201320637569 U CN 201320637569U CN 203769966 U CN203769966 U CN 203769966U
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- explosive motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model relates to a mechanically-supercharged explosive motor. The mechanically-supercharged explosive motor comprises at least two cylinders, at least one air exhaust turbocharger, and an air exhaust recirculation device. Each of the cylinders comprises at least one air outlet and at least one air inlet. According to the explosive motor provided by the utility model, the run-time behavior of the explosive motor during the partial outage time is optimized.
Description
Technical field
The utility model relates to the engine driven supercharging explosive motor with at least two cylinders, wherein,
Each cylinder has by gas exhaust piping and connects so that via at least one air outlet of exhaust emissions system discharge exhaust,
Each cylinder has by air inlet pipeline and connects to supply with at least one suction port of pressurized air via gas handling system,
At least one exhaust turbine supercharger is provided, and it comprises the turbine that is arranged in exhaust emissions system and is arranged on the compressor in gas handling system,
At least two cylinder configuration are for making them form at least two groups, in every group, there is at least one cylinder, even if wherein at least one cylinder of first group is in the situation that the inactive cylinder also moving of the part of this explosive motor, and at least one cylinder of second group forms the cylinder that can be switched in the mode relevant with load, and
Exhaust gas re-circulation apparatus is provided.
The utility model also relates to for operating the method for the explosive motor of described type.
Background technique
Above the explosive motor of described type as motor vehicle drives unit.In context of the present utility model, word " explosive motor " comprises diesel engine and Otto engine and mixed power explosive motor, namely, utilizes mixed power burning to process the explosive motor of operation.
In the exploitation of explosive motor, elementary object is minimizing of fuel consumption, and the emphasis of wherein making great efforts is the whole efficiency improving about obtaining.
Fuel consumption and efficiency have therefore caused problem, particularly the in the situation that of Otto engine, namely, the in the situation that of application igniting explosive motor.Its reason is the principle of the running of Otto engine.Load is controlled and conventionally by the closure trap being arranged in gas handling system, is undertaken.By adjusting joint valve trap, the suction pressure in closure trap downstream can reduce to greater or lesser degree.Closure trap is closed more, namely to block gas handling system more for described closure trap, air inlet is larger in the pressure loss at closure trap two ends, and in closure trap downstream with to enter at least two cylinders be that the pressure of air inlet of the entrance upstream in firing chamber is lower.For constant combustion chamber volume, by the pressure of air inlet, air quality being set is by this way that the amount of air is feasible.This has also illustrated that why quantity regulating has been proved to be is particularly disadvantageous in sub load scope, because low-load needs throttling and the significant pressure of the height of gas handling system to reduce, along with reducing load and increasing throttling, air inlet exchange loss increases thus.
In order to reduce described loss, the various strategies that go throttling (dethrottling) to application igniting explosive motor have been developed.
In order to solve a kind of approach that goes throttling of Otto engine, it is the Otto engine acting process for example with direct injection.The direct injection of fuel is for realizing the suitable means of the firing chamber inflation of layering.In certain limit, to the direct injection of the fuel in firing chamber, therefore allow the quality in Otto engine to regulate.Mixture forms by producing in cylinder or to the direct injection that is arranged in the airborne fuel of cylinder, rather than the external mix thing being introduced in the air inlet in gas handling system by fuel forms.
The another kind of approach that goes throttling that solves Otto engine is provided by cylinder deactivation, namely, and the stopping using of each cylinder within the scope of certain load.The efficiency of the Otto engine in sub load operation can be stopped using and be enhanced by part, namely increase, because if engine power remains unchanged, the inactive of many cylinders explosive motor cylinder increased keeping the load of other cylinders of operation, closure trap can or must further be opened to introduce more air quality in described cylinder, thereby realize on the whole the throttling of going of explosive motor.Between part lay-off period, in higher load region, for good and all move the cylinder of work, (specific fuel consumption) is lower for the specific fuel consumption in higher load region.Load aggregation moves towards higher load thus.
The cylinder that keeps operation between part lay-off period further has improved mixture compared with large air quality or mixture quality and forms due to what supply with, and allows higher exhaust gas recirculatioon speed.
Because of following former thereby obtain other advantages about efficiency, the cylinder being deactivated, due to not burning, does not therefore produce any wall thermal loss causing due to the heat transmission from combustion gas to chamber wall.
Even diesel engine, it is automatic ignition explosive motor, due to they based on quality regulate, regulate the Otto engine of load to compare with the throttling by the inflation about cylinder recited above or quantity regulating and there is higher efficiency, i.e. lower fuel consumption, even if but the in the situation that of diesel engine, also there is improved potentiality and improved requirement about fuel consumption and efficiency.
Same is cylinder deactivation for reducing a concept of fuel consumption in the situation that of diesel engine, and the cylinder of each within the scope of certain load stops using.In operation at part load, by part, stop using and can improve the efficiency that increases diesel engine, even because the in the situation that of diesel engine, in the situation that constant engine power, the stopping using of at least one cylinder of many cylinders explosive motor also increased still at the load of other cylinders of operation, described cylinder is moved in higher load region, and in higher load region, fuel consumption rate is lower.Load aggregation in the operation at part load of diesel engine moves towards higher load.
Between part lay-off period, keep the cylinder of operation due to the fuel mass of larger supply, namely due to richer mixture, and further allow higher exhaust gas recirculatioon speed.About wall thermal loss, can obtain the advantage same with the situation of Otto engine, for this reason with reference to the corresponding explanation providing.
The in the situation that of diesel engine, in the situation that causing minimizing load due to fuel used amount minimizing, the part regulating as quality, part is inactive is also intended to prevent that fuel air mixture from becoming rare.
Modern ic motor has been equipped with exhaust turbo-charger and for reducing the exhaust gas re-circulation apparatus of the object of oxycarbide discharge more prevalently, the feature of wherein said equipment each other contradiction or each other contradiction and with the inactive concept contradiction of part, as by following brief description.
Engine driven supercharging be in the swept volume remaining unchanged (swept volume) for increasing power of IC engine, or when keeping identical power for reducing the suitable means of swept volume.Under any circumstance, engine driven supercharging causes the increase of cubic power output and the power-weight ratio of raising.Therefore, for identical vehicle boundary conditions, load aggregation can be moved towards higher load, under higher load, specific fuel consumption is lower.This is also called as minification.
The engine driven supercharging therefore continuous effort of help in explosive motor exploitation, to minimize fuel consumption, namely improves the efficiency of explosive motor.Reducing pollutant effulent is another basic object.The configuration of the engine driven supercharging by target, obtains about efficiency and about the advantage of exhaust emission, is possible equally.By for example suitable to diesel engine engine driven supercharging, therefore can reduce nitrogen oxides emissions, and without any loss in efficiency.Can advantageously affect hydrocarbon emissions simultaneously.
For example the advantage of the exhaust turbine supercharger relevant with mechanical supercharger is between pressurized machine and explosive motor, not need the mechanical connection for transmitted power.Although mechanical supercharger has extracted for driving the needed whole energy of this mechanical supercharger from explosive motor, and thereby therefore reduced output power and adversely affected efficiency, exhaust turbine supercharger has utilized the exhaust energy of thermal exhaust.
The configuration of exhaust turbo-charger has proposed a difficult problem.According to prior art, in the situation that reach some engine speed of target, conventionally do not observe serious moment of torsion decline.If consider that inflation pressure ratio depends on turbine pressure ratio, described moment of torsion declines and can understand.If engine speed reduces, this causes less exhaust mass flow and therefore causes lower turbine pressure ratio.As a result, under the guiding of lower engine speed, inflation pressure reduces than equally, and it equals moment of torsion and declines.
The decline of inflation pressure substantially can by turbine cross-sectional dimension reduce offset, but this causes the shortcoming under high-engine rotating speed, under high-engine rotating speed, the engine driven supercharging of hope and power increment can have equally unrestricted mode and arrive the degree of wishing.
Therefore, attempting to improve by various measures the torque characteristics of engine driven supercharging explosive motor, for example, is exhaust turbine supercharger and/or mechanical supercharger by a plurality of mechanical superchargers that provide with parallel connection and/or tandem arrangement in exhaust emissions system.
Utilize at the same time in the situation of exhaust turbo-charger and exhaust gas re-circulation apparatus, if extract exhaust gas recirculation by high pressure EGR device from the exhaust emissions system of the upstream of the turbine at this at least one exhaust turbine supercharger, and this exhaust gas recirculation no longer can be used for driving turbine, there is contradiction.The exhaust mass flow of the minimizing by turbine causes lower turbine pressure ratio, and result inflation pressure is than also declining, and it equals less pressurized air flow.Less pressurized air flow also can have the effect that compressor operating surpasses surge limit.
At exhaust gas recirculatioon speed X
eGRin situation about increasing, the extraction flow being introduced in turbine further reduces, and problem recited above aggravation.If consider for realize nitrogen oxides emissions very big minimizing and may be at X
eGRhigh exhaust gas recirculatioon speed X in the scope of ≈ 60% to 70%
eGR, this has relevance especially.
Here, exhaust gas recirculatioon speed X
eGRbe defined as X
eGR=m
eGR/ (m
eGR+ m
fresh?
air), m wherein
eGRthe quality that represents exhaust gas recirculation, and m
fresh?
airrepresent to be introduced into by the quality of compressor and the compressed fresh air providing.
Effect described above also affects the inactive concept of part, and causes specifically the restriction of the inactive practicability of part, causes specifically the restriction of the inactive load range that can apply of part.Offer the amount of charge air of the minimizing of the cylinder still moving between part lay-off period, exhaust gas recirculatioon specifically and by high pressure EGR device simultaneously described in offer between part lay-off period the still amount of charge air of the minimizing of the cylinder of operation and reduced combustion efficiency or combustion quality, and fuel consumption and pollutant effulent are had to adverse influence.Thereby seriously limited and can be used in the inactive load range of part.
The inflation pressure causing due to the exhaust mass flow of the minimizing by turbine reduce also to have the effect that increases air inlet exchange loss.The air inlet exchange loss increasing has reduced the improvement about fuel consumption and efficiency of stopping using and obtaining due to part, and the inactive benefit of part is lost at least in part.
In the situation that there is the explosive motor of switchable valve actuation, wherein the valve actuation of inactive cylinder is deactivated, total mass flow rate by explosive motor and thereby the exhaust mass flow introduced by turbine because inactive cylinder lacks mass flow rate, be reduced, the disadvantageous effect of the operation for explosive motor that this causes or has aggravated to have described.
For the reason that proposed above, even if in the situation that provide and use the explosive motor of exhaust turbo-charger and exhaust gas re-circulation apparatus, also need improved concept, utilize this improved concept, part is stopped using and is become feasible and favourable.
Model utility content
The utility model has solved the technical problem that prior art exists.
For background technique recited above, the purpose of this utility model is to provide the explosive motor of engine driven supercharging as described in this description, and it is optimised about its operation action between part lay-off period.
Another specific item of the present utility model be the method for explosive motor that provides the described type of operation.
The passing through of the first specific item has the explosive motor of at least two cylinders realizes, wherein
Each cylinder has by gas exhaust piping and connects at least one air outlet via exhaust emissions system discharge exhaust,
Each cylinder has by air inlet pipeline and connects for supply with at least one suction port of pressurized air via gas handling system,
At least one exhaust turbine supercharger is provided, and it comprises the turbine that is arranged in exhaust emissions system and is arranged on the compressor in gas handling system,
At least two cylinders, it is configured so that they form at least two groups, in every group, there is at least one cylinder, even if wherein at least one cylinder of first group is in the situation that the inactive cylinder also moving of the part of this explosive motor, and at least one cylinder of second group forms the cylinder that can be switched in the mode relevant with load, and
Exhaust gas re-circulation apparatus is provided,
And wherein
This exhaust gas re-circulation apparatus is low pressure EGR device and comprises recirculating line, this recirculating line in the downstream of the turbine of at least one exhaust turbine supercharger from exhaust emissions system branch, and gas handling system is led in its upstream at associated compressor, and in described recirculating line, be provided for regulating the valve of exhaust gas recirculation amount.
According to explosive motor of the present utility model in the situation that, in the scope of exhaust gas re-circulation apparatus, by low pressure EGR, exhaust is recycled.EGR is contrary with high pressure, and the in the situation that of low pressure EGR, the exhaust of having flow through turbine is introduced in gas handling system.For this reason, low pressure EGR device has in the downstream of this turbine from exhaust emissions system branch and in the upstream of this compressor, leads to the recirculating line of gas handling system.
By the exhaust gas recirculatioon of low pressure EGR, be characterised in that thus the recirculation that the exhaust mass flow by turbine is not deflated reduces, turbine pressure ratio and inflation pressure are not reduced than, namely, pressurized air flow remains unchanged.
The exhaust that is recycled to inlet side via low pressure EGR device mixes with fresh air in the upstream of compressor.Fresh air offers compressor and compressed pressurized air with the mixture formation of the exhaust gas recirculation producing by this way.
This low pressure EGR device allows the recirculation of a large amount of exhausts, realizes high recirculation rate X
eGR, particularly between part lay-off period, and inflation pressure is not adversely reduced, and is not undesirably reduced.
According in explosive motor of the present utility model, explosive motor is as described in this description provided, it is optimised about its operation action between part lay-off period.Thereby realized the utility model based on first object.
According to explosive motor of the present utility model, have at least two cylinders or at least two group cylinders, wherein every group has at least one cylinder.In this respect, having and form every group of explosive motor with three cylinders of three groups of a cylinder, or have and be configured to every group of explosive motor with six cylinders of two groups of three cylinders, is according to explosive motor described in the utility model equally.In the inactive scope of part, three-bank cylinders can be activated in succession or stop using, thereby also can realize twice switching.Thereby partly stop using and be further optimized.Cylinder group also can comprise the cylinder of different numbers.
According to embodiment's of the present utility model explosive motor, in operation at part load, under low-load, optimize the efficiency of explosive motor, its middle-low load T
lowpreferably amount to and be less than the maximum load T under present engine rotation speed n
max, n50% load, be preferably and be less than this maximum load T
ma?
x, n30%.
The explosive motor of engine driven supercharging is preferably equipped with charge-air cooling system, and by this charge-air cooling system, compressed pressurized air was cooled before it enters cylinder.By this way, the density of the pressurized air of supply is further increased.By this way, the cooling inflation that contributes to equally to compress and improve cylinder.It can be favourable that charger-air cooler has bypass line, so that when needed, for example, after cold start-up, can walk around charger-air cooler.
The valve being arranged in recirculating line is used for regulating recirculation rate.Described EGR valve can be the valve in physical significance, but can be also the trap regulating in a stepwise manner or regulate in continuous variable mode.The adjusting of recirculation rate can operation point the mode of regulation occur, function as load T, engine speed n, oil temperature and/or analog occurs specifically, and in the situation that the explosive motor of liquid cooling, also the function as coolant temperature occurs.
EGR valve can be electric, hydraulic pressure, pneumatic, machinery or magnetic controlled, preferably by engine controller controls.
Other advantageous embodiments of described explosive motor are discussed in connection with dependent claims.
It is favourable that the embodiment of explosive motor of the engine driven supercharging of exhaust turbine supercharger is provided, and this exhaust turbine supercharger comprises the turbine being arranged in exhaust emissions system and is arranged on the compressor in gas handling system.
If explosive motor only has single exhaust turbine supercharger, the turbine cross section of this turbine or described turbine should be designed to large air displacement, namely for large exhaust quality flow rate, even if make also to guarantee satisfactory, guarantee specifically enough engine driven superchargings and power increment under high-engine rotating speed.
Therefore such explosive motor is particularly suitable for according to configuration described in the utility model, because in the situation that part is stopped using and simultaneously by the exhaust gas recirculatioon of high pressure EGR, the turbine with large turbine cross section will be made responsive especially and violent reaction to invading the very little residue air displacement of this turbine.Result will be the obvious decline of inflation pressure and the disadvantageous effect of stopping using about part that as above discusses in detail.
The embodiment of the explosive motor of such engine driven supercharging is favourable, at least one exhaust after treatment system is wherein provided in exhaust emissions system, for example, oxidation catalytic converter, three-way catalytic converter, storage catalytic converter, selective catalytic conversion device and/or particulate filter.
Because exhaust in low pressure EGR device is conducted through compressor, therefore described exhaust must stand exhaust aftertreatment in advance, stands specifically exhaust aftertreatment in particulate filter.By this way, having avoided in the geometrical shape that changes compressor is the deposition changing in the compressor of stream cross section specifically, and thereby has avoided reducing the efficiency of compressor.
For above-mentioned reason, the embodiment of the explosive motor of described engine driven supercharging is favourable, wherein in the downstream of turbine of at least one exhaust turbine supercharger and the exhaust emissions system of the upstream of recirculating line, at least one exhaust after treatment system is set.By this way, exhaust stood exhaust aftertreatment before being recycled to inlet side.
The embodiment of the explosive motor of engine driven supercharging is herein particularly advantageous, and wherein said at least one exhaust after treatment system is particulate filter.
In the situation that have the explosive motor of the engine driven supercharging of four cylinders that arrange with array, namely, the in the situation that of four cylinder straight engines, described embodiment is favourable, and wherein two outside cylinders and two inner side each self-formings of cylinder are one group.
The embodiment of the explosive motor of described engine driven supercharging can be favourable, at least one exhaust gas re-circulation apparatus is wherein provided, this exhaust gas re-circulation apparatus comprises recirculating line, and its upstream at the turbine of at least one exhaust turbine supercharger is from exhaust emissions system branch and lead to gas handling system in the downstream of compressor.
The in the situation that of described so-called high pressure EGR device, exhaust is extracted out and is transported to the gas handling system in compressor downstream from the exhaust emissions system of this turbine upstream, therefore before carrying out recirculation, exhaust needs not be subjected to exhaust aftertreatment, do not need to offer specifically particulate filter, because there is not the danger of the compressor of making dirty.
Even if reduced and introduced by the exhaust mass flow of turbine by the recirculation of the thermal exhaust of high pressure EGR, but also can have advantages of so produce, particularly in the situation that realized and need the high pressure of large pressure gradient recirculation rate between outlet side and inlet side.
And, if the danger that does not exist inflation pressure to decline at inlet side can utilize high pressure EGR device.
The embodiment of the explosive motor of described engine driven supercharging is favourable, and wherein each cylinder has for introducing the direct injection apparatus of fuel.The in the situation that of Otto engine, directly injection can be used for realizing and go throttling.
Embodiment as herein described is favourable, and wherein each cylinder has for directly spraying the nozzle of object.
For part is stopped using, in the situation that the fuel of the explosive motor directly spraying supply with can be than in the situation that have the explosive motor that air inlet pipeline sprays and stopped using sooner and more reliably, wherein the residual fuel in air inlet pipeline can cause the undesirable burning in inactive cylinder.
However, the embodiment of the explosive motor of described engine driven supercharging can be favourable, and wherein the object for feed fuels provides air inlet pipeline injection apparatus.
The embodiment of the explosive motor of described engine driven supercharging is favourable, and the cooler for cooling exhaust gas recirculation is wherein provided in the recirculating line of low pressure EGR device.
Just as already explained, in order to obtain the very big minimizing of nitrogen oxides emissions, can need high exhaust gas recirculatioon speed, it can have X
eGRthe magnitude of the amplitude of ≈ 60% to 70%.In order to realize this high recirculation rate, the pipeline that cooler is arranged on for exhaust gas recirculatioon may be favourable or necessary.
Described cooler has reduced the temperature of flow of hot exhaust and thereby has increased the density of this exhaust.By this way, the temperature of the cylinder fresh charge causing after fresh air mixes with exhaust gas recirculation is lowered equally, and cooler also contributes to improve the inflation of cylinder described in result.
The utility model based on being specially of the second specific item provide for operating the method for explosive motor of the engine driven supercharging of the above-mentioned type, it is realized by a kind of method, in the method, at least one switchable cylinder of second group is as the function of the load T of this explosive motor and be switched, by this way, if the load T that can be scheduled to
downlower than desired value, described at least one switchable cylinder is deactivated, and if can predetermined load T
upsurpass desired value, described at least one switchable cylinder is activated.
About the content having illustrated according to explosive motor described in the utility model, be also applied to according to method described in the utility model, for this reason at this moment conventionally with reference to the explanation of doing about explosive motor above.Different explosive motors partly needs diverse ways variant.
Respectively for lower than desired value with surpass desired value preestablished limit load T
downand T
upcan there is equal amplitude, but amplitude also can be different.When explosive motor is when moving, the cylinder in first group of cylinder is the cylinder of permanent operation.The switching of generation to second group of cylinder, described second group of cylinder enabling and stopping using.
Method variant is favourable, wherein as predetermined load T
downlower than desired value and when preload, keep below described predetermined load T
downreach predetermined amount of time Δ t
1time, this at least one cylinder of second group is deactivated.
The introducing that is the inactive extra condition of part for second group of cylinder inactive is intended to prevent in following situation, enable excessively frequently and stop using, particularly prevents that part is stopped using excessively frequently, only drops to momently lower than predetermined load T loading
downand and then raise, or for loading at predetermined value T
downfluctuation around, is proved to be that part is stopped using is reasonably or the stop using situation of necessary desired value of part and be not less than.
For this reason, method variant is favourable equally, wherein as predetermined load T
upbe exceeded and current load is kept above described predetermined load T
upreach predetermined amount of time Δ t
2time, at least one cylinder of second group is activated.
Method variant is favourable, and wherein, inactive in the situation that, to this, the fuel of at least one switchable cylinder is supplied with and is deactivated.This has obtained the advantage about fuel consumption and pollutant effulent, the object that therefore contributes to part to stop using and pursue, the object that particularly reduces fuel consumption and raise the efficiency.The in the situation that of automatic ignition explosive motor, the fuel that may even be necessary to stop using is supplied with to prevent from being reliably arranged in the igniting of the mixture of cylinder.
Method variant is favourable, and at least one cylinder being wherein in operation is lighted by automatic ignition.
Said method variant relates to the method taking fire by automatic ignition, and therefore also relates to the work method being generally used in diesel engine.
Method variant is favourable equally, and wherein each cylinder has for starting the ignition mechanism of application igniting, and wherein, inactive in the situation that, the ignition mechanism of this at least one switchable cylinder is preferably deactivated.
Said method variant relates in the situation that apply the use of explosive motor the method for igniting, for example, is directly spraying in Otto engine, and its cylinder all has the ignition mechanism of lighting a fire for starting application in each case.
Yet, can also utilize and there is the mixed power combustion process of automatic ignition for the operation of Otto engine, for example so-called HCCI (homogeneous charge compression ignition) method, is also called firing chamber ignition method or CAI (controlled automatic ignition) method.The controlled automatic ignition of described method based on being supplied to the fuel of cylinder.Here, the in the situation that of diesel engine, fuel burns with together with excessive air, i.e. the burning of metachemistry metering ratio.The nitrogen oxides emissions No that lean-burn Otto engine is relatively low because low combustion temperature has
x, and equally because lean mixture does not have carbon smoke exhaust.And HCCI method produces high thermal efficiency.Here, fuel both can directly be introduced in cylinder, also can be introduced in suction tude.
The embodiment of described method is favourable, wherein predetermined load T
downand/or T
upthe engine speed n that depends on this explosive motor.Therefore, there is a more than Rate of load condensate, when load is lower than desired value or over after desired value, all switch, and regardless of engine speed n.The substitute is, be the method relevant to engine speed subsequently, and in defined feature mapping graph (characteristic map), the inactive region of part occurs.
It is feasible in essence that other running parameters of explosive motor are considered the inactive criterion of part, and described other running parameters are explosive motor cold start-up engine temperature or coolant temperature afterwards for example.
Method variant is favourable, the pressurized air of minimum flow that wherein can be predetermined, and be no less than the pressurized air of this amount, be fed at least one inactive cylinder.
In this respect, between part lay-off period, switchable cylinder will not exclusively be supplied with and separate with pressurized air, not close.
The embodiment of described method is favourable, and wherein between part lay-off period, exhaust main that will recirculation will that is to say by means of the recirculation of low pressure EGR device, and at least one half-pass of exhaust total amount that will recirculation is crossed the recirculation of low pressure EGR device.
The embodiment of described method is favourable, and wherein between part lay-off period, exhaust that will recirculation is by the recirculation exclusively of low pressure EGR device.
The embodiment of described method is favourable, wherein between part lay-off period, and X
eGR>=30% recirculation rate realizes by low pressure EGR device.
Specifically, the embodiment of described method is favourable, wherein between part lay-off period, and X
eGR>=40% recirculation rate realizes by low pressure EGR device.
Accompanying drawing explanation
One exemplary embodiment according to Fig. 1 is illustrated in greater detail to the utility model below.In the accompanying drawings:
Fig. 1 schematically shows the first embodiment of the explosive motor of automatic ignition.
Reference mark
1 first cylinder, outside cylinder
2 second cylinders, inner side cylinder, switchable cylinder
3 the 3rd cylinders, inner side cylinder, switchable cylinder
4 the 4th cylinders, outside cylinder
The air inlet pipeline of 5 cylinders
6 gas handling systems
The gas exhaust piping of 7 cylinders
8 exhaust emissions systems
9 four cylinder in line engine
10 explosive motors
12 exhaust turbine superchargers
12a turbine
12b compressor
13 exhaust after treatment system
14 particulate filters
15 exhaust gas re-circulation apparatus, low pressure EGR device
16 total inlet pipe roads
17 recirculating lines
18 total air escape pipe roads
19EGR valve
The engine speed of n explosive motor
T load
T
downthe load of being scheduled to for load lower than desired value
T
lowload in lower sub load scope
T
max?
nmaximum load in present engine rotation speed n
T
upfor the load of being scheduled to that surpasses the load of desired value
Δ t
1can predetermined time section
Δ t
2can predetermined time section
X
eGRrecirculation rate
Embodiment
Fig. 1 schematically shows the first embodiment of the explosive motor 10 of automatic ignition.
Described explosive motor is the four cylinder in line engine 9 with direct injection, wherein four cylinders 1,2,3,4 are along the longitudinal axis setting of cylinder head, along straight line setting, and be all equipped with in each case the sparger for burner oil, the fuel quantity wherein spraying is used for regulating air ratio lambda (not shown).
Each cylinder 1,2,3,4 has for the air inlet pipeline 5 via gas handling system 6 supply pressurized airs with for the gas exhaust piping 7 via the 8 discharge exhausts of exhaust emissions system.
Object for engine driven supercharging, explosive motor 10 is equipped with exhaust turbine supercharger 12, wherein turbine 12a is arranged in the total air escape pipe road 18 of exhaust emissions system 8, and the compressor 12b of exhaust turbine supercharger 12 is arranged in the total inlet pipe road 16 of gas handling system 6.The pressurized air that is supplied to explosive motor 10 is compressed in compressor 12b, and for this reason, the heat content of exhaust is used in turbine 12a.
Described explosive motor 10 is also equipped with exhaust gas re-circulation apparatus 15, is specially and is equipped with low pressure EGR device 15.For this reason, recirculating line 17 in the downstream of turbine 12a from exhaust emissions system 8 branches and lead to gas handling system 6 in the upstream of compressor 12b.For regulating the valve 19 of the air displacement of recirculation to be arranged on the recirculating line 17 of exhaust gas re-circulation apparatus 15.
For the reprocessing of exhaust, as the particulate filter 14 of exhaust after treatment system 13, be arranged in the total air escape pipe road 18 in turbine 12a downstream so that exhaust be recycled to inlet side and by compressor 12b before purify this exhaust.
Four cylinders 1,2,3,4 are configured and form two groups, wherein every group has two cylinders 1,2,3,4, wherein two outside cylinders 1,4 form first group, even if in the situation that the part of explosive motor 10 is inactive, the cylinder 1,4 of first group is also in service, and two inner side cylinders 2,3 form second group, this cylinder of second group consists of cylinder 2,3, and this cylinder 2,3 can be switched and be deactivated between part lay-off period in the mode relevant with load.
When the load that can be scheduled to is during lower than desired value, in operation at part load, the cylinder 2,3 of second group is sprayed and is deactivated by the fuel of stopping using.For the burden requirement in the cylinder 1,4 of operating first group still, be therefore increased, then these cylinders under lower specific fuel consumption with higher load operation.This causes the raising of efficiency.
The recirculation that low pressure EGR device 15 allows large air displacement, namely, has realized high recirculation rate X
eGR, particularly equally between part lay-off period, and inflation pressure is not adversely reduced, and undesirably reduces.
Claims (11)
1. the explosive motor of an engine driven supercharging (10), it has at least two cylinders (1,2,3,4), it is characterized in that:
Each cylinder (1,2,3,4) has by gas exhaust piping (7) connection at least one air outlet via exhaust emissions system (8) discharge exhaust;
Each cylinder (1,2,3,4) has by air inlet pipeline (5) connection for supply with at least one suction port of pressurized air via gas handling system (6);
At least one exhaust turbine supercharger (12) is provided, and it comprises the turbine (12a) being arranged in described exhaust emissions system (8) and is arranged on the compressor (12b) in described gas handling system (6);
At least two cylinders (1,2,3,4), it is configured such that they form at least two groups, and wherein every group has at least one cylinder (1,2,3,4), wherein at least one cylinder (Isosorbide-5-Nitrae) of first group is even if be in the situation that the inactive cylinder (Isosorbide-5-Nitrae) also moving of the part of described explosive motor (10), and at least one cylinder (2 of second group, 3) form the cylinder (2,3) that can switch in the mode relevant with load, and
It is EGR device (15) that exhaust gas re-circulation apparatus is provided,
Wherein
This exhaust gas re-circulation apparatus (15) comprises recirculating line (17), this recirculating line (17) in the downstream of the turbine (12a) of described at least one exhaust turbine supercharger (12) from described exhaust emissions system (8) branch, and this recirculating line (17) leads to described gas handling system (6) in the upstream of associated compressor (12b), and in this recirculating line (17), be provided with the valve (19) for regulating the air displacement of recirculation.
2. the explosive motor of engine driven supercharging according to claim 1 (10), it is characterized in that providing exhaust turbine supercharger (12), it comprises and is arranged on the turbine (12a) in this exhaust emissions system (8) and is arranged on the compressor (12b) in described gas handling system (6).
3. the explosive motor of engine driven supercharging according to claim 1 and 2 (10), is characterized in that at least one exhaust after treatment system (13) is arranged in described exhaust emissions system (8).
4. the explosive motor of engine driven supercharging according to claim 3 (10), is characterized in that described at least one exhaust after treatment system (13) is arranged in described turbine (12a) downstream of at least one exhaust turbine supercharger (12) and the described exhaust emissions system (8) of described recirculating line (17) upstream.
5. the explosive motor of engine driven supercharging according to claim 3 (10), is characterized in that described at least one exhaust after treatment system (13) is particulate filter (14).
6. the explosive motor of engine driven supercharging according to claim 4 (10), is characterized in that described at least one exhaust after treatment system (13) is particulate filter (14).
7. the explosive motor of engine driven supercharging according to claim 1 (10), is characterized in that having four cylinders (1,2 arranging in upright arrangement, 3,4), one group of each self-forming of cylinder (2,3) inside two outsides cylinder (1,4) and two wherein.
8. the explosive motor of engine driven supercharging according to claim 1 (10), it is characterized in that providing at least one exhaust gas re-circulation apparatus, it comprises recirculating line, this recirculating line is in the upstream of the turbine (12a) of described at least one exhaust turbine supercharger (12) from exhaust emissions system (8) branch, and this recirculating line leads to described gas handling system (6) in the downstream of described compressor (12b).
9. the explosive motor of engine driven supercharging according to claim 1 (10), is characterized in that each cylinder (1,2,3,4) is all equipped with for introducing the direct injection apparatus of fuel.
10. the explosive motor of engine driven supercharging according to claim 1 (10), is characterized in that described exhaust gas re-circulation apparatus (15) is low pressure EGR device (15).
The explosive motor of 11. engine driven superchargings according to claim 10 (10), is characterized in that, in the recirculating line (17) of described low pressure EGR device (15), being provided with the cooler for cooling exhaust gas recirculation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012218808.8 | 2012-10-16 | ||
| DE102012218808 | 2012-10-16 |
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| Publication Number | Publication Date |
|---|---|
| CN203769966U true CN203769966U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320637569.XU Expired - Fee Related CN203769966U (en) | 2012-10-16 | 2013-10-16 | Mechanically-supercharged explosive motor |
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| CN (1) | CN203769966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863793A (en) * | 2015-02-11 | 2016-08-17 | 通用汽车环球科技运作有限责任公司 | Turbocharged internal combustion engine equipped with a Lean NOx Trap |
| CN106481414A (en) * | 2015-08-26 | 2017-03-08 | 福特环球技术公司 | Engine driven supercharging explosive motor with low pressure EGR apparatus and its operational approach |
-
2013
- 2013-10-16 CN CN201320637569.XU patent/CN203769966U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863793A (en) * | 2015-02-11 | 2016-08-17 | 通用汽车环球科技运作有限责任公司 | Turbocharged internal combustion engine equipped with a Lean NOx Trap |
| CN106481414A (en) * | 2015-08-26 | 2017-03-08 | 福特环球技术公司 | Engine driven supercharging explosive motor with low pressure EGR apparatus and its operational approach |
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