CN101571077A - Method for increasing torque of directly jetting turbo charging internal combustion engine - Google Patents
Method for increasing torque of directly jetting turbo charging internal combustion engine Download PDFInfo
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- CN101571077A CN101571077A CNA2009101380064A CN200910138006A CN101571077A CN 101571077 A CN101571077 A CN 101571077A CN A2009101380064 A CNA2009101380064 A CN A2009101380064A CN 200910138006 A CN200910138006 A CN 200910138006A CN 101571077 A CN101571077 A CN 101571077A
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Abstract
The invention relates to a method for increasing torque of directly jetting turbo charging internal combustion engine, and discloses a method for increasing torque in a directly jetting internal combustion engine. The directly jetting turbo charging internal combustion engine increases pressure by an exhaust turbine charger, and at least a cylinder is provided, which includes an outlet for releasing exhaust gas connected to an exhaust pipeline of the exhaust channel. Air inlet exchange is control by an air inlet valve and an air outlet valve in the method. In the at least one cylinder of the internal combustion engine, besides the main jetting for providing the needed fuel, at least one rear jetting is implemented. The fuel supplied from the at least one rear jetting is combusted with extra burning air, and the extra burning air is not from the original introduced air into the cylinder, but independently supplied. The invention aims to provide a method to overcome the shortcomings in the prior art, especially generate improved torque utility in a relative low engine rotation scope, which is implemented by igniting and combusting fuel in the exhaust pipeline.
Description
Technical field
The present invention relates to increase the method for the moment of torsion of directly jetting turbo charging internal combustion engine.
Background technique
The significance of the supercharging of explosive motor increases gradually, and supercharging is the main method that increases power, the needed air of combustion process in the compression engine in the method.
The typical case of less high blower engine is the spark ignition engine with exhaust turbo-supercharging, exhaust energy is used for compression and combustion air and motor and additionally has the air inlet cooling in this motor, and the combustion air by the air inlet cooled compressed cooled off before it enters into the firing chamber.Charge air cooler reduces air temperature, thereby increases the density of air, so cooler also helps firing chamber air inlet better, that is to say the increase air quality.
Supercharging typically uses exhaust turbine supercharger and finishes, and compressor is arranged on the identical axle with turbine in exhaust turbine supercharger, and flow of hot exhaust is fed to turbine and the output energy that expands in described turbine, and therefore axle begins rotation.Utilization be input to turbine and finally be input to the axle energy drive the compressor that is arranged on equally on the axle.Compressor is supplied with and is compressed the air inlet that is fed to wherein, therefore obtains the supercharging of cylinder.
With respect to traditional mechanical supercharger, the advantage of exhaust turbine supercharger is not provide or require mechanical connection between pressurized machine and explosive motor.
As mentioned above, the use of exhaust turbine supercharger in recent years significantly increases, and can predict such development and not finish.This there are numerous reasons, briefly enumerate as follows:
As mentioned above, supercharging is mainly used to increase the power of explosive motor.Needed air in the compression and combustion process is so that the bigger air quality of every work cycle supply arrives each cylinder.In this way, can increase fuel mass and and then increase middle pressure.
Though also can increase the power of explosive motor basically by increasing engine speed n, yet be necessary to consider that the mechanical load of explosive motor is mean effective pressure p in proportion to
Me, mean effective pressure can increase by supercharging, described mechanical load is along with engine speed increases square pro rata so that more favourable about fret wear greater than specific engine speed, with by supercharging promptly by increasing mean effective pressure p
MeIncrease power.
Therefore, supercharging is at the power that does not change discharge capacity increase explosive motor or reduces discharge capacity and the constant suitable method of power.For specific vehicle boundary conditions, therefore the load transfer of set might be arrived higher load, wherein specific fuel consumption is lower.This is also referred to as miniaturization.
Therefore the supercharging of explosive motor helps to make the minimized effect of fuel consumption, that is to say the efficient of improving explosive motor.
The basic target of another of supercharging is to reduce the discharging of pollutant.Supercharging is favourable equally in addressing this problem.Because (targeted) targetedly of supercharging design may have advantage particularly in efficient and exhaust emissions.
Particularly produce difficulty in the design of exhaust turbine supercharger, wherein being desirably in provides tangible power to increase in all engine speed ranges.Yet,, do not notice under the situation of specified engine speed that tangible moment of torsion descends reaching according to prior art.This result is undesirable because even in low engine speed range, the driver also expects correspondingly have higher moment of torsion with respect to the non-supercharged engine with identical peak output.Therefore the so-called turbo lag under low engine speed also is one of important disadvantages of exhaust turbo-supercharging.
If consider that the suction pressure ratio depends on turbine pressure ratio, it is understandable that described moment of torsion descends.For example, if in diesel engine, reduce engine speed, this causes lower exhaust mass flow, thereby causes lower turbine pressure ratio.The result of Chan Shenging is for lower engine speed like this, and suction pressure reduces than same, and this is equivalent to moment of torsion and descends.
At this moment, to offset the decline of suction pressure be possible substantially in the increase of the minimizing of the size by the turbine cross section and relevant turbine pressure ratio.Exhaust turbine supercharger with variable turbine physical dimension can be used in the diesel engine, but because its complexity is very expensive, and because unacceptable higher delivery temperature does not also have serial use the in spark ignition engine at present.
Yet, in practice, described relation usually causes minimum possible exhaust turbine supercharger, that is to say and uses the exhaust turbine supercharger with the possible turbine cross section of minimum, even so that can produce enough suction pressures under the situation of less blast air.Thereby moment of torsion descends and finally offsets lesser extent, and moment of torsion descends further mobile on the direction of low engine speed.In addition, described method that is to say that the size that reduces the turbine cross section is conditional, because the supercharging of expectation and power increase should be possible and unrestricted and can reach degree under higher engine speed.
According to prior art, attempt using various measures to improve the torque characteristic of boosting explosive motor.
For example, method is the turbine cross section to be designed to less, and provides synchronous exhaust emissions, and wherein exhaust emissions can be controlled by suction pressure or by exhaust pressure.
In diesel engine, the design that the turbine cross section is less and by under higher rotation speed, regulating fuel mass to limit suction pressure synchronously be favourable.Yet this moment, can not utilize the possibility that increases power by exhaust turbo-supercharging fully.
Yet exhaust turbine supercharger also can be designed as bigger turbine cross section for higher engine speed.At this moment, gas handling system (induction system) is configuration by this way then, promptly because the pressure wave phenomenon issues lively attitude supercharging in lower engine speed.The shortcoming here is high-caliber construction expenditure and delay of response under the situation of engine speed change.
Can also be by mixing the torque characteristic that supercharging improves boosting explosive motor.At this moment, be connected in parallel and a plurality of turbosupercharger with corresponding less turbine cross section increase along with load and drive.
Increase moment of torsion, in Germany disclosed specification DE 19944190A1, describe especially for overcoming a method that during starts lacks moment of torsion by the direct spray type explosive motor of exhaust turbine supercharger supercharging.
The method of describing in DE 19944190A1 is provided to the back injection of the fuel in one or more cylinders of explosive motor so that improve torque characteristic by the explosive motor of exhaust turbine supercharger supercharging.
At this moment, this method based on target be in low engine speed range, to improve the response characteristic of explosive motor, particularly offset in lacking of observed moment of torsion during starts, this is because low excessively exhaust mass flow or low excessively exhaust energy cause under low engine speed.
This should finish by the back injection of additional fuel, additional fuel by the back injection of burning, transmitting the enthalpy directly increase suddenly of the blast air of the turbine that passes through exhaust turbine supercharger before the starting process with among the starting process, so that pass through the response characteristic of the suction pressure improvement explosive motor of increase in this way.
For this purpose, explosive motor is not operated under stoichiometric air-fuel ratio, but operates under rarer air fuel ratio, that is to say to have excessive air.Excessive air is used for oxidation, i.e. the fuel that sprays of burning back since in identical cylinder still in the main burning that takes place or because the higher temperature of the combustion gas that formed is lighted the mixture that the fuel that excessive air and back sprays forms.
In addition, DE 19944190A1 emphasizes the back control of spraying that is provided for enabling and stops using, particularly regulation can detect the method for upcoming starting process earlier, so that the moment of torsion usability that the back increase that injection produces was provided in the correct time that is to say according to demand with the improvement response characteristic.
The advantage of the method for describing in DE 19944190A1 is not require that extra member implements this method, by to the back injection of additional fuel targetedly, as requested control improves torque characteristic separately.Therefore might realize described method with the expense of minimum, and therefore described method is adapted at replenishing (retroactive) in the explosive motor on the market Already in and implements.
On the contrary, shortcoming is to be that this method uses the combustion air that is derived from initial cylinder air inlet, and this combustion air begins to keep utilizing during being higher than stoichiometric proportion master burning, or only heating and take energy in this way from combustion gas out of.The back is sprayed necessary rare air-fuel ratio operation requirement and has been limited the selection of the operating parameter of explosive motor, and may resist or stop explosive motor with respect to fuel consumption and pollutant discharging operation in an advantageous manner.
In main burning, being fed to air ratio in the cylinder, to be used for the fuel quantity that perfect combustion sprays desired more.The needed combustion air of after-combustion of the fuel of back injection after a while is provided in this way.
At this moment, the burning center of gravity only moves in after a while direction basically.Yet, this simply mode realize and more advantageously realize by postponing firing angle.Yet this occurs in the boosting explosive motor of a nearest generation in any case.In the explosive motor of configuration in this way, can not obtain the further increase of moment of torsion by the method for describing among the DE 19944190A1.Particularly, far away if the burning center of gravity moved in after a while direction, no matter use any measure, moment of torsion will further descend.
Aspect this, use be not be derived from initial cylinder air inlet but separately the method for extra combustion air burning supplied fuel amount in spray at least one back of supply have improved space.
In Germany disclosed specification DE 10217238A1, such method has been described, the described method that is general type of preamble as claimed in claim 1.
For the outer combustion air of amount supplied, produce valve overlap by the camshaft adjustment in mode targetedly, even wherein at least one exhaust valve does not also cut out, at least one intake valve is opened.Because the pressure gradient that exists between entrance point and outlet end under low engine speed and high capacity, during the valve overlap that produces, extra air flow in the cylinder, and if suitably then enters into exhaust duct.
The shortcoming of the method for describing among the DE 10217238A1 is to light the fuel that spray the back in cylinder, and therefore burns in cylinder at least in part.
In all method variants, in the firing chamber, light supplied fuel amount in spray at least one back, spark plug by in cylinder, providing particularly, because the main burning that in cylinder, is still taking place, the mixture of fuel that spray the back and extra combustion air is encapsulated in interior (enveloped) and is lighted by main flame of combustion leading edge, and perhaps the higher temperature that exists in the firing chamber owing to the combustion gas that are derived from main burning is lighted.
Owing to be to light in the firing chamber in cylinder, be necessary to receive because heat is delivered to energy loss or the enthalpy loss that chamber wall causes from hot combustion gas, this is opposite with described target, and is opposite with the target that increases moment of torsion by the increase exhaust enthalpy particularly, so this is reactive.
By in identical cylinder, still lighting the mixture of the fuel formation of extra air and back injection in master's burning of generation, perhaps use the higher temperature of the combustion gas that in main burning, form to light, limit the selection of the discharge time that sprays at least one back significantly.
In this example, the back is sprayed inevitably and is taken place in the expansion stroke of piston, so that main burning or high temperature are guaranteed to light.
Summary of the invention
Under this background, target of the present invention provides a kind of method that increases the moment of torsion of directly jetting turbo charging internal combustion engine, overcome shortcoming well known in the prior art by this method, this method produces the usability of improved moment of torsion especially in low engine speed range.
The method of the moment of torsion of described target by being used for increasing the direct spray type explosive motor is finished, this direct spray type explosive motor is by the exhaust turbine supercharger supercharging and have at least one cylinder, this cylinder has at least one outlet that discharges exhaust, this outlet is connected to the gas exhaust piping of exhaust duct, in the method by intake valve and exhaust valve control air inlet exchange, in at least one cylinder in explosive motor, except the main injection that required fuel wherein is provided, also implementing at least one back sprays, the amount of the fuel of the back injection of supply and extra combustion air burning in spray at least one back, this extra combustion air is not to be derived from initial cylinder air inlet, but supply separately, wherein in exhaust duct, light and the back fuel that sprays that burns.
The present invention relates to increase the method for the moment of torsion in the direct spray type explosive motor, this direct spray type explosive motor is by the exhaust turbine supercharger supercharging and have at least one cylinder, this cylinder has at least one outlet that discharges exhaust, this outlet is connected to the gas exhaust piping of exhaust duct, the air inlet exchange is by intake valve and exhaust valve control in the method, in at least one cylinder of explosive motor, except the main injection that required fuel wherein is provided, also implementing at least one back sprays, the fuel quantity of the back injection of supply and extra combustion air burning in spray at least one back, this extra combustion air is not to be derived from initial cylinder air inlet, but supply separately.
At this, main injection can be made up of a plurality of single injections.According to prior art, for example in diesel engine, fuel is fed to the firing chamber by the injection of a plurality of less relatively fuel quantities, thereby weakens the unexpected pressure rising that the fuel spontaneous combustion causes, and therefore stops so-called diesel vibration (diesel rattle).
In the context of the present invention, it is the fuel quantity that is provided for main injection in main injection that term " main injection " is interpreted as looking like, and provides by a plurality of injections in due course particularly.
For the independently burning of the fuel of the back injection of second burning that is taken as outside the main burning, the method according to this invention provides extra air with independent method step.Compare with the method for in DE 19944190A1, describing, in previous air inlet exchange, do not supply described air, that is to say that described air is not to be derived from initial fresh cylinder air inlet as the part of cylinder air inlet.Do not need rare air fuel ratio burning.
The method according to this invention even allow dense air-fuel ratio operation at main aflame explosive motor just says that also the stoichiometric proportion that is lower than that lacks air burns.The setting of the operation of explosive motor, particularly air ratio is totally independent of the back injection that will implement, so that be independent of the method that the operator scheme of explosive motor can implement to increase moment of torsion.
In the content of the explanation of preferred embodiment, explain the different modes that extra combustion air supply can take place in detail.
The burning of fuel that sprays by the back and extra combustion air, the chemical energy that comprises in described fuel discharge and are used for increasing the enthalpy of combustion gas and and then increase the enthalpy of blast air.Relatively heat and therefore the abundanter blast air of energy guarantee higher turbine back pressure and and then higher suction pressure, this guarantees to improve air inlet and and then guarantees that finally moment of torsion increases.
Be compared to and be used for improving the method that torque characteristic is described at DE 10217238A1, the method according to this invention is characterised in that lights in exhaust duct and the fuel that sprays the back of burning.
Because the fact of not lighting in cylinder has eliminated being associated with described shortcoming of lighting type, particularly eliminated because the enthalpy loss that heat transfer causes to chamber wall.
With the increase of mode generation exhaust enthalpy targetedly, that is to say in exhaust duct, the downstream of the outlet of at least one cylinder and the turbine that therefore approaches exhaust turbine supercharger as much as possible that is to say that the enthalpy that just in time increases herein is favourable and in fact gainful.Because the shortening of stream from the ignition location to the turbine, blast air also allow minimum possible amount of time with cooling, this helps the target that the present invention is based on, increases exhaust enthalpy to improve the moment of torsion usability with possible effective and efficient manner particularly.
The target that the present invention is based on, be in particular the method for the moment of torsion that is provided for increasing directly jetting turbo charging internal combustion engine, overcome shortcoming known in the art by this method, produce improved moment of torsion usability in the special low engine speed range of this method, finish by the method according to this invention.
The embodiment's of this method advantage is to provide extra combustion air fully or partly in the valve overlap stage.At least one intake valve and at least one exhaust valve at least one cylinder of valve overlap stage are opened, because forward is discharged the outer combustion air of pressure gradient amount supplied of (scavenging).
Valve overlap fundamentally relates to crank angle range, and wherein the outlet of cylinder import and cylinder is all opened, so that the part of air stream is by cylinder and directly lead to exhaust duct and need not participate in main the burning.
Valve overlap advantageously makes actual main burning or be lower than the stoichiometric proportion generation with stoichiometric proportion.Rare air-fuel ratio operation of explosive motor is therefore unnecessary, so that provide the fuel that sprays after the oxidation needed air with the form of the main excess air of burning of hyperstoichiometry ratio.The needed oxygen of burning of the fuel that spray the supply back in valve overlap is to the firing chamber, or exhaust duct.Especially, bigger overlapping of the shut-in time of outlet and the open-interval of import guaranteed also to guarantee the extraction completely (purging) of residual gas and bigger cylinder air inlet except the air supply of the expectation that is used for after-combustion.
The combustion air that is used for the fuel quantity of back injection by the forward head pressure gradient supply that occurs in the valve overlap in the turbosupercharged engine in low engine speed range.At this moment, in the valve overlap stage, the fresh air that flows out from intake manifold is by the firing chamber and enter into gas exhaust manifold.Described air mass flow increases suitable fuel quantity and sprays to the back.
Especially, the embodiment's of this method advantage is the valve overlap operation of explosive motor with 0 ° to 120 ° CA (crankshaft angle in degrees), preferably with 40 ° of valve overlap or 60 ° of valve overlap operations to 80 ° of CA to 90 ° of CA.
The embodiment's of this method advantage is the purpose of the air quantity passed through for increase, does not have the explosive motor of later spraying with respect to routine, in explosive motor with at least one back spraying, and the valve overlap optimization.Valve overlap greater than 90 ° of CA may be favourable basically, even big like this valve overlap is uncommon in the prior art.
Described embodiment considers, be compared to method common in the explosive motor of routine, the method according to this invention outer air of amount supplied targetedly is used for the fuel oxidation that spray the back, and the optimization of valve overlap is used to promote and help the supply of described air.
Realize easily that by variable valve actuation at least in part changeable air valve is overlapping, wherein variable valve actuation is used the long period in series product, so that all of described method variant require to have existed and do not required complicated extra member.
The embodiment's of this method the extra combustion air that is also advantageous in that provides by mechanical second air jet fully or partly.Second air jet that may be already provided be used for the rear oxidation of the carbon monoxide of exhaust duct and unburned hydrocarbon can be used for this purpose.
At this moment, second air jet can substituting or be used from the supply of additional air with valve overlap one as valve overlap.
The embodiment's of this method advantage be igniting top dead center (ITDC) afterwards 270 ° to 450 ° CA implement at least one back and spray, preferably igniting top dead center (ITDC) afterwards 300 ° to 360 ° CA implement.ITDC refer in burning compression stage and between the expansion stage piston be in or move the top dead center that passes through.
The back spray and the burning of the fuel that spray the back therefore because on the direction of air inlet exchange, that is to say that the main burning on the direction of air inlet exchange top dead center (CE-TDC) was moved from the piston expansion stage.Air inlet exchange top dead center refers between exhaust phase and the air inlet commutation period between the charging stage piston and is in or moves the top dead center that passes through.
The fuel quantity that described method is guaranteed to spray the back occurs in the exhaust duct but light in fact at first not by still lighting in cylinder at the hot combustion gas that the master of taking place is burnt or described main burning produces.
The embodiment's of this method advantage is that implementing promptly to begin at least one back in the valve overlap of intake valve and exhaust valve unlatching sprays.
The embodiment of this method is also advantageous in that 0 ° of CA to 20 ° of CA begins at least one back injection, preferably 0 ° of CA to 10 ° of CA before the unlatching of at least one intake valve before the unlatching of at least one intake valve.
The fuel that sprays by after the spark ignitor that provides in exhaust duct is provided the embodiment's of this method advantage.
The fuel that spray the back is lighted in being also advantageous in that by the glow plug (glow plug) that provides in exhaust duct of the embodiment of this method.
Implement when preferably only flow velocity is hanged down in existence in gas exhaust piping or exhaust duct by plug ignition, and glow plug also advantageously is suitable at relative high flow velocities down-firing.Though spark plug is lighted the sky burning mixt by producing ignition spark, glow plug increases temperature in the blast air partly by produce power, so that in the zone of partial restriction, near the empty burning mixt spark plug reaches the temperature that is higher than minimum temperature or is higher than the desired firing temperature of lighting a fire.
By providing on spark plug sleeve pipe or protective housing are set promptly, spark plug might be made for relative high flow rate more insensitive.
In having the explosive motor of at least two cylinders, be ejected into a fuel quantity in the cylinder after the embodiment's of this method advantage is and in exhaust duct, light by the combustion gas of another cylinder of explosive motor.
The combustion gas that main injection produces in cylinder are discharged in the exhaust duct by exhaust valve in air inlet exchange basically, so that described combustion gas are ejected into the fuel in the identical cylinder after no longer can be used for lighting.The combustion gas that still are retained in the cylinder in spray the back also may be cooled to bigger degree.
Yet the combustion gas of the main burning of cylinder can be advantageously in conjunction with lighting the fuel that spray the back, be ejected into the fuel of described cylinder even be not used in after lighting, but be ejected into the fuel quantity of another cylinder after being used to light.
At this moment, the fuel quantity of the back injection in cylinder is lighted by the hot combustion gas in another cylinder in exhaust duct.The described type of lighting is favourable, not only because starting to light does not need to implement special measure or additional member is provided, and because the directly increase of startup exhaust enthalpy in the exhaust duct of the upstream of turbine, thereby and with possible effective and efficient manner.
Being also advantageous in that in exhaust duct of the embodiment of this method lighted the fuel that spray the back because the spontaneous combustion of catalysis material startup is installed in the exhaust duct.
From known in the art, be to reduce the pollutant discharging, use the catalytic reactor that utilizes catalysis material to make, increase the speed of specific reaction or reduce the minimum temperature that the specific reaction of for example guaranteeing the oxidation of HC and CO at low temperatures takes place.
According to the embodiment of the method for described invention, use catalysis material so that start the burning of the empty burning mixt in the exhaust duct, particularly by this way, ignition temperature promptly starts to be lighted desired minimum temperature catalysis and reduces.
At this moment, be compared to by the lighting of glow plug, be not that the temperature of sky burning mixt increases up to meeting or exceeding ignition temperature, but implement opposite process, also just saying influence ignition temperature, particularly in the such mode of use catalysis material reduction ignition temperature.
Exhaust duct is equipped with catalysis material and can takes place in a different manner or implement.
The embodiment's of this method advantage is that at least one gas exhaust piping of turbine upstream or the inwall of exhaust duct scribble catalysis material at least in part.
The embodiment's of this method at least one carrier (support) that scribbles catalysis material that is also advantageous in that is arranged in the exhaust duct of turbine upstream, preferably be centered in the gas exhaust piping, that is to say the lambda prober (lambda probe) that is similar in the entry zone of explosive motor.
At this moment, the embodiment's of this method advantage is that it is catalytic converter that at least one catalytic reactor is provided in the exhaust duct of turbine upstream, and this catalytic reactor is varying sized according to present application.
At this moment, the special advantage of this method is that at least one catalytic converter is arranged on the downstream of at least one outlet of at least one cylinder.At this moment, at least one catalytic converter is positioned in the gas exhaust piping of contiguous outlet.Described catalytic converter is directly flow through in the exhaust that discharges from cylinder after leaving the firing chamber.
If suitable and,, start the spontaneous combustion of the empty burning mixt that flows through catalytic converter because ignition temperature reduces preferably in the zone of a plurality of mixtures.
Describe the present invention hereinafter in detail based on method variant with reference to the accompanying drawings.
Description of drawings
Accompanying drawing is figured out unlatching exhaust valve, unlatching intake valve, valve overlap, spray the back and the crank angle range of burning.
Reference character
AO opens the crank angle range of exhaust valve
EO opens the crank angle range of intake valve
CE-TDC air inlet exchange top dead center
The crank angle range of spraying behind the NA
The V burning
The crank angle range of VS valve overlap
The ITDC top dead center of lighting a fire
Embodiment
Accompanying drawing is figured out the crank angle range of unlatching exhaust valve (AO), unlatching intake valve (EO), valve overlap (VS), back injection (NA) and burning (V).
Exhaust valve exchanges top dead center (CE-TDC) in air inlet and cuts out afterwards, and intake valve exchanges top dead center (CE-TDC) in air inlet and opens before.Air inlet exchange top dead center refers to the top dead center that the piston operation is passed through in exhaust phase and the exchange of the air inlet between the charging stage.This causes both valve overlaps (VS) in opening of intake valve (EO) at cylinder and exhaust valve (AO).
In valve overlap (VS), because the outer combustion air of forward head pressure gradient amount supplied, this extra combustion air is used for the burning of the fuel quantity of back injection.The back is sprayed (NA) and itself is taken place in the valve overlap stage (VS) equally, takes place soon at CE-TDC in this case particularly.
In the charging stage of air inlet exchange or in the compression of fresh cylinder air inlet, empty burning mixt light and burning occurs in the exhaust duct.
Claims (13)
1. method that increases the moment of torsion of direct spray type explosive motor, described direct spray type explosive motor is by the exhaust turbine supercharger supercharging, and has at least one cylinder, described cylinder has at least one outlet that discharges exhaust, described outlet is connected to the gas exhaust piping of exhaust duct, in described method, control the air inlet exchange by intake valve and exhaust valve, in at least one cylinder of described explosive motor, except the main injection that required fuel wherein is provided, also implementing at least one back sprays, the fuel quantity of the back injection of supply and extra combustion air burning in spray described at least one back, described extra combustion air is not to be derived from initial cylinder air inlet, but supply separately, wherein in described exhaust duct, light and the back fuel that sprays that burns.
2. the method for claim 1 is characterized in that, provides described extra combustion air fully or partly in the valve overlap stage.
3. method as claimed in claim 2 is characterized in that, described explosive motor is with 0 ° of valve overlap operation to 120 ° of crank angles.
4. as claim 2 or 3 described methods, it is characterized in that the purpose of the air quantity of passing through for increase does not have the explosive motor of later spraying with respect to routine, in explosive motor with at least one back spraying, described valve overlap optimization.
5. as any described method in the above-mentioned claim, it is characterized in that, provide described extra combustion air fully or partly by mechanical second air jet.
6. as any described method in the above-mentioned claim, it is characterized in that 270 ° to 450 ° crank angles are implemented described at least one back injection after the igniting top dead center.
7. as any described method in the above-mentioned claim, it is characterized in that 300 ° to 360 ° crank angles are implemented described at least one back injection after the igniting top dead center.
8. as any described method in the above-mentioned claim, it is characterized in that, in the valve overlap of described intake valve and the unlatching of described exhaust valve, implement promptly to begin described at least one back and spray.
9. as any described method in the claim 1 to 7, it is characterized in that 0 ° to 10 ° crank angle begins described at least one back injection before the unlatching of at least one intake valve.
10. as any described method in the above-mentioned claim, it is characterized in that, by the fuel of the spark ignitor that in described exhaust duct, provides described back injection.
11. any described method as in the claim 1 to 9 is characterized in that, lights the fuel that spray described back by the glow plug that provides in described exhaust duct.
12. as any described method in the claim 1 to 9, it is characterized in that, in order to increase the moment of torsion of explosive motor with at least two cylinders, after be ejected into a fuel quantity in the cylinder and in exhaust duct, light by the combustion gas in another cylinder of described explosive motor.
13. any described method as in the claim 1 to 9 is characterized in that, lights the fuel that spray described back by the spontaneous combustion that the catalysis material startup is installed owing to exhaust duct in described exhaust duct.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008021320.9 | 2008-04-29 | ||
| DE102008021320 | 2008-04-29 |
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| CN101571077A true CN101571077A (en) | 2009-11-04 |
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| CNA2009101380064A Pending CN101571077A (en) | 2008-04-29 | 2009-04-23 | Method for increasing torque of directly jetting turbo charging internal combustion engine |
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| EP1076166A2 (en) * | 1999-08-12 | 2001-02-14 | Volkswagen Aktiengesellschaft | Method and apparatus for the determination of the intake air in an internal combustion engine |
| US20020073696A1 (en) * | 2000-11-03 | 2002-06-20 | Johannes Kuenstler | Method for regenerating a diesel particulate filter |
| US6729124B2 (en) * | 2001-08-16 | 2004-05-04 | Robert Bosch Gmbh | Method and arrangement for operating an internal combustion engine |
| DE10217238A1 (en) * | 2002-04-18 | 2003-11-06 | Bosch Gmbh Robert | Method, computer program, control and regulating device for operating an internal combustion engine, and internal combustion engine |
| CN1748076A (en) * | 2003-02-20 | 2006-03-15 | 卡特彼勒公司 | Compressed engine working on a late clising miller cycle |
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| WO2006064143A1 (en) * | 2004-12-14 | 2006-06-22 | Renault S.A.S. | Protecting an oxidation catalyst upstream of a particulate filter for a diesel engine by limitation of injected fuel |
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Application publication date: 20091104 |