CN107178421A - Engine system with air throttle self-stripping unit and air throttle method for self-cleaning - Google Patents

Abstract

A kind of engine system with air throttle self-stripping unit and air throttle method for self-cleaning, can be in the case where not needing external equipment and the burning in cylinder body will not be negatively affected, automatically air throttle is cleaned, to be purged to the carbon distribution and dirty material at throttle position.In engine system, air throttle self-stripping unit as engine system internal portions, including the first collecting tank and nozzle, piston is provided with the first collecting tank, so that the inside of the first collecting tank is divided into the first space and second space, by the first space of gas collection to the first collecting tank at the crankcase of the internal combustion engine of engine system, and the gas in the first space of the first collecting tank is compressed, so as to which being located in the inlet manifold of the gas injection after compression to engine system more to be leaned on to the position in airintake direction upstream side or downstream using nozzle than electronic throttle, to be cleaned to electronic throttle.

Description

Engine system with air throttle self-stripping unit and air throttle method for self-cleaning

Technical field

The present invention relates to a kind of engine system, more particularly to a kind of band air throttle self-cleaning dress The engine system and air throttle method for self-cleaning put.

Background technology

It is well known that in engine system, due to the reason of gas blowby so that positioned at inlet manifold The air throttle of airintake direction upstream side is highly susceptible to the pollution of greasy dirt, muddy additionally, due to air inlet, long And it is long be easy to cause carbon distribution on air throttle, finally air throttle is caused damage or even endangers whole The safe handling of engine system.

Mostly it is by external at present as the method for mitigating or preventing the infringement suffered by air throttle Certain solution scrubs air throttle to spray.

For example, in patent document 1 (CN202707244U), it is known that disclose a kind of carbon distribution cleaning Device, as shown in figure 13, the carbon distribution cleaning plant are included：One pressure bottle 1, built-in cleaning agent；One Pipeline 2, its side is mounted on the pressure bottle 1；One nozzle 3, is mounted on the opposite side of the pipeline 2； One air hose 4, the air hose 4 is mounted between inlet manifold 5 and mass air flow sensor 6, is passed through The nozzle 3 is inserted to the jack 41 of air hose 4, the front end of the nozzle 3 is located at mass air flow sensor The inner space of air hose 4 between 6 and air throttle 7, then by the cleaning agent in pressure bottle 1 by the road 2 are sprayed by the front end of nozzle 3 towards the direction of the air throttle 7 of inlet manifold 5, and the solar term are cleared up to dissolve Carbon distribution in door 7 and IAC 8.

Pass through above-mentioned this method, although the infringement suffered by air throttle can be mitigated, but still suffered from Following technical problem：Not only need in the external equipment of special time so that carbon distribution cleaning is laborious time-consuming, And above-mentioned cleaning agent enter cylinder body after combustion efficiency can be equally negatively affected.

Therefore, how not need external equipment and negative shadow will not carried out to the combustion zone in cylinder body In the case of sound, cleaning automatically is carried out to air throttle and become as a kind of technical problem urgently to be resolved hurrily.

The content of the invention

The present invention makees to solve above-mentioned technical problem, and its object is to provide a kind of band air throttle self-cleaning The engine system and air throttle method for self-cleaning of device, the above-mentioned engine system with air throttle self-stripping unit System can be in the case where not needing external equipment and the burning in cylinder body will not be negatively affected, certainly Dynamic ground is cleaned to air throttle, to be purged to the carbon distribution and dirty material at throttle position.

To achieve these goals, first technical scheme of the first aspect of the present invention provides a kind of belt segment The engine system of valve self-stripping unit, it is characterized in that, the air throttle self-stripping unit is used as institute The internal portions of engine system, including the first collecting tank and nozzle are stated, is collected described first Piston is provided with tank, the inside of first collecting tank is divided into the first space and second space, By the of gas collection to first collecting tank at the crankcase of the internal combustion engine of the engine system One space, and the gas in the first space of first collecting tank is compressed, so as to utilize institute Nozzle is stated by being located at than electronics in the inlet manifold of the gas injection after compression to the engine system Air throttle is clear to be carried out to the electronic throttle more by airintake direction upstream side or the position in downstream Wash.

Second technical scheme of the first aspect of the present invention is the first technology in the first aspect of the present invention On the basis of scheme, it is characterized in that, the air throttle self-stripping unit of the engine system is also wrapped Include gas injection air inlet pipe, working gas air inlet pipe, gas injection discharge pipe and working gas discharge First space side is leaned in pipe, one end of the gas injection air inlet pipe with first collecting tank Outer end wall connection, the other end is connected with the crankcase of the internal combustion engine, the working gas air inlet pipe One end be connected with the outer end wall by the second space side of first collecting tank, the other end connect Electronic throttle described in the ratio in the inlet manifold is connected to more to lean at the position of airintake direction upstream side, One end of the gas injection discharge pipe is with first collecting tank by the outer of first space side End wall is connected, and the nozzle is arranged on the other end of the gas injection discharge pipe, the working gas One end of discharge pipe is connected with the outer end wall by the second space side of first collecting tank, separately Electronic throttle more leans on the position in airintake direction downstream described in the ratio that one end is connected in the inlet manifold Place is put, in the gas injection air inlet pipe, the working gas air inlet pipe, gas injection discharge Pipe and the midway of the working gas discharge pipe are respectively arranged with open and close valve, using from the air inlet discrimination Electronic throttle described in ratio in pipe is work more by the gas collected at the position of airintake direction upstream side Gas, is compressed to the gas in the first space of first collecting tank.

According to composition as described above, due to being provided with air throttle self-stripping unit as engine system A part, by using being located at than electronic throttle more by airintake direction upstream side position in inlet manifold The gas at place is put, to being collected at the crankcase of internal combustion engine and being stored in air throttle self-stripping unit 200 The first collecting tank the first space in gas be compressed, and lead to after condition as defined in meet Cross nozzle to spray the assigned position of electronic throttle, so as to using than in inlet manifold The bigger gas of gas pressure carries out clear to the carbon distribution at the assigned position of electronic throttle and dirty material Remove.

3rd technical scheme of the first aspect of the present invention is the first technology in the first aspect of the present invention On the basis of scheme, it is characterized in that, the air throttle self-stripping unit of the engine system is also wrapped Include gas injection air inlet pipe, working gas air inlet pipe, gas injection discharge pipe, working gas discharge pipe, Second collecting tank and working gas collecting pipe, one end of the gas injection air inlet pipe and described first The outer end wall by first space side of collecting tank is connected, the bent axle of the other end and the internal combustion engine Case is connected, and the second space is leaned in one end of the working gas air inlet pipe with first collecting tank The outer end wall connection of side, the other end is connected to the exhaust end of second collecting tank, the injection gas One end of body discharge pipe is connected with the outer end wall by first space side of first collecting tank, The nozzle is arranged on the other end of the gas injection discharge pipe, the one of the working gas discharge pipe End is connected with the outer end wall by the second space side of first collecting tank, and the other end is connected to Electronic throttle described in ratio in the inlet manifold is more leaned at the position in airintake direction downstream, described One end of working gas collecting pipe is connected with the inlet end of second collecting tank, and the other end is connected to institute State electronic throttle described in the ratio in inlet manifold more to lean at the position of airintake direction upstream side, described Gas injection air inlet pipe, the working gas air inlet pipe, the gas injection discharge pipe, the work The midway of gas outlet pipe and working gas collecting pipe is respectively arranged with open and close valve, will be from the air inlet Electronic throttle described in ratio in manifold is more by the gas collection at the position of airintake direction upstream side to institute The second collecting tank is stated as working gas, the work gas of the collection in second collecting tank is utilized Body is compressed to the gas in the first space of first collecting tank.

According to composition as described above, due to being provided with air throttle self-stripping unit as engine system A part, by will more lean on airintake direction upstream side position than electronic throttle in being located at for inlet manifold Unnecessary (high pressure) air inlet at place is collected and is stored in the second collecting tank of air throttle self-stripping unit, And using the gas collected in the second collecting tank to being collected at the crankcase of internal combustion engine and being stored in section Gas in first space of the first collecting tank of valve self-stripping unit is compressed, and is being met The assigned position of electronic throttle is sprayed by nozzle after defined condition, so as to because Electronic throttle reduces suddenly and the useless air inflow of abruptly increase is collected, and the with above-mentioned first aspect Two technical schemes are compared, can be using the gas of collected bigger pressure to collecting and being stored in solar term Gas in first space of the first collecting tank of door self-stripping unit is compressed, so as to pressure The higher gas of contracting degree is purged to the carbon distribution and dirty material at the assigned position of electronic throttle.

4th technical scheme of the first aspect of the present invention is the second technology in the first aspect of the present invention On the basis of scheme or the 3rd technical scheme, it is characterized in that, the nozzle stretches to the inlet manifold In ratio described in electronic throttle more by airintake direction upstream side position at.

To achieve these goals, the second aspect of the present invention provides a kind of air throttle method for self-cleaning, The air throttle method for self-cleaning is the band air throttle of the second technical scheme of the first aspect of the invention described above The air throttle method for self-cleaning of the engine system of self-stripping unit, it is characterized in that, including：To electronics section The throttle conditions detection process that the state of valve is detected；The section judged electronic throttle aperture Valve opening deterministic process；By at the crankcase of the internal combustion engine of the engine system by gas collection to institute The gas injection for stating the first space of the first collecting tank with air throttle self-stripping unit collects process；Profit Received with position of the electronic throttle described in the ratio in the inlet manifold more by airintake direction upstream side The gas of collection is working gas, and the gas in the first space of first collecting tank is compressed Gas compression processes；And in the case where meeting injection conditions, discharged using gas injection is arranged on Nozzle on the other end of pipe, will be stored in the compression in first space of first collecting tank Gas injection afterwards into the inlet manifold of the engine system be located at more leaned on than electronic throttle into The nozzle course of injection of the position in gas direction upstream side or downstream, in throttle opening deterministic process, When meeting the pressure in the inlet manifold less than the first setting set in advance, i.e. first condition, Carry out the gas injection and collect process, the electronic throttle unit interval closing angle is big when meeting When the second setting set in advance, i.e. second condition, the gas compression processes are carried out, when not When meeting the first condition and being unsatisfactory for the second condition, the injection conditions of the nozzle is carried out Judge, and carry out when meeting the injection conditions nozzle course of injection.

In addition, according to air throttle method for self-cleaning as described above, by being judged as at electronic throttle In crack state, (that is, the pressure in inlet manifold is less than a certain threshold value set in advance (the first regulation Value)) when, the gas at the crankcase of internal combustion engine is collected and air throttle self-cleaning dress is stored in In first space of the first collecting tank put, it is being judged as electronic throttle in unexpected closure state (that is, electronic throttle unit interval closing angle is more than a certain threshold value set in advance (the second regulation Value)) when, using being now placed in than electronic throttle more by unnecessary at the side position of airintake direction upstream (high pressure) air inlet, in the first space of the first collecting tank for being stored in air throttle self-stripping unit Gas be compressed, and as defined in meet in the case of injection conditions, by nozzle to electronics section The assigned position of valve is sprayed, so as to not need external equipment and will not be to the combustion in cylinder body In the case that burning is negatively affected, automatically electronic throttle is cleaned, with to electronic throttle Carbon distribution and dirty material at the assigned position of door 140 are purged.

To achieve these goals, the third aspect of the present invention provides a kind of air throttle method for self-cleaning, The air throttle method for self-cleaning is the band air throttle of the 3rd technical scheme of the first aspect of the invention described above The air throttle method for self-cleaning of the engine system of self-stripping unit, it is characterized in that, to electronic throttle The throttle conditions detection process that state is detected；The air throttle that electronic throttle aperture is judged is opened Spend deterministic process；By at the crankcase of the internal combustion engine of the engine system by gas collection to the belt segment The gas injection in the first space of the first collecting tank of valve self-stripping unit collects process；By it is described enter Electronic throttle described in ratio in gas manifold is more used as work by the gas at the position of airintake direction upstream side Make working gas of the gas collection in second collecting tank and collect process；Using collecting described the The working gas in two collecting tanks, is carried out to the gas in the first space of first collecting tank The gas compression processes of compression；And in the case where meeting injection conditions, using being arranged on injection gas Nozzle on the other end of body discharge pipe, will be stored in first space of first collecting tank Compression after gas injection into the inlet manifold of the engine system be located at than electronic throttle More by the nozzle course of injection of airintake direction upstream side or the position in downstream, judge in throttle opening During, when meet the pressure in the inlet manifold less than the first setting set in advance, i.e. the During one condition, carry out the gas injection and collect process, when meeting the electronic throttle unit interval When closing angle is more than the second setting set in advance, i.e. second condition, the working gas is carried out Collection process；When being unsatisfactory for the first condition and being unsatisfactory for the second condition, the gas is carried out Body compression process, then judges the injection conditions of the nozzle, and is meeting the jet strip The nozzle course of injection is carried out during part.

According to air throttle method for self-cleaning as described above, by being judged as that it is crack that electronic throttle is in State (that is, the pressure in inlet manifold is less than a certain threshold value (the first setting) set in advance) When, the of air throttle self-stripping unit is collected and is stored in the gas at the crankcase of internal combustion engine In first space of one collecting tank, it is being judged as that it is (that is, electric that electronic throttle is in unexpected closure state Sub- air throttle unit interval closing angle is more than a certain threshold value (the second setting) set in advance) when, By because electronic throttle reduces suddenly and the useless air inflow of abruptly increase is collected and be stored in air throttle from In second collecting tank of cleaning device, the gas using collected bigger pressure is then able to storage Gas in first space of the first collecting tank that there is air throttle self-stripping unit is compressed, and (that is, the pressure in gas injection discharge pipe is more than certain in inlet manifold injection conditions as defined in meeting Maximum pressure value in time span) in the case of, pass through assigned position of the nozzle to electronic throttle Sprayed, so that compared with the second aspect of the present invention, can be with the higher gas pair of compression degree Carbon distribution and dirty material at the assigned position of electronic throttle are purged, and elimination efficiency is higher.

On the basis of above-mentioned second aspect or the third aspect, it may be desirable to, in the injection gas During body is collected, by located at the gas injection air inlet pipe and the working gas discharge pipe midway Open and close valve is opened, and will be located at the working gas air inlet pipe and the gas injection discharge pipe or described The opening and closing of working gas air inlet pipe, the gas injection discharge pipe and the working gas collecting pipe midway Valve is closed, then, by the gas collection at the crankcase to described the first of first collecting tank In space.

On the basis of the above-mentioned third aspect, it may be desirable to, collect process in the working gas In, by the open and close valve opening located at the working gas collecting pipe midway, the gas injection will be located at Air inlet pipe, the working gas air inlet pipe, the gas injection discharge pipe and working gas row The open and close valve of outlet pipe midway is closed, then, and the gas collection in inlet manifold to described second is collected In tank.

On the basis of above-mentioned second aspect or the third aspect, it may be desirable to, in the gas pressure In compression process, by the open and close valve opening located at the working gas air inlet pipe midway, the spray will be located at Penetrate the opening and closing of gas inlet pipe, the gas injection discharge pipe and the working gas discharge pipe midway Valve is closed, and the piston located at first collecting tank is promoted using the working fluid, to described first Gas in first space of collecting tank is compressed.

On the basis of above-mentioned second aspect or the third aspect, it may be desirable to, in nozzle spray During penetrating, the pressure in the gas injection discharge pipe and the pressure in the inlet manifold are calculated Between pressure differential, then calculate the injection dutycycle of the nozzle, open and be located at the gas injection The open and close valve of discharge pipe midway, makes the nozzle be sprayed with the nozzle dutycycle.

According to air throttle method for self-cleaning as described above, because the emitted dose of nozzle is main by nozzle location The size of the pressure differential between pressure in the pressure and inlet manifold at place is determined, makes nozzle to calculate Unlatching dutycycle sprayed, therefore, it is possible to cause nozzle is realized with minimum gas injection optimal Jeting effect.

On the basis of above-mentioned second aspect or the third aspect, it may be desirable to, the spray of the nozzle The condition of penetrating is that the pressure in the gas injection discharge pipe is more than certain time span in the inlet manifold Interior maximum pressure value.

On the basis of above-mentioned second aspect or the third aspect, it may be desirable to, the spray of the nozzle The condition of penetrating is that the pressure completed in nozzle injection enabled condition study and the inlet manifold is more than study Value, is located at fully open position, or the position electricity within the unit interval when detecting pedal position sensor Acute variation is pressed, is judged as completing the nozzle injection enabled condition study.

According to air throttle method for self-cleaning as described above, due to adding injection in judging in injection conditions The self-learning method of pressure permissible value, it is therefore, above-mentioned in addition to it can realize above-mentioned technique effect Learning value constantly can learn and update along with the change of the pressure of inlet manifold, it is thus possible to according to The difference of the driving habit of driver, increase or frequency and the cycle for reducing nozzle injection, in addition equally Nozzle is enabled to realize optimal jeting effect with minimum gas injection.

Brief description of the drawings

Fig. 1 is the band air throttle self-stripping unit for representing an embodiment of the present invention (embodiment 1) Engine system schematic diagram.

Fig. 2 is with air throttle self-stripping unit to an embodiment of the present invention (embodiment 1) The flow chart that the control flow of engine system is illustrated.

Fig. 3 is with air throttle self-stripping unit to an embodiment of the present invention (embodiment 1) The sub-process figure that gas collection process (the first space) in engine system is illustrated.

Fig. 4 is with air throttle self-stripping unit to an embodiment of the present invention (embodiment 1) The sub-process figure that gas compression processes (the first space) in engine system are illustrated.

Fig. 5 is with air throttle self-stripping unit to an embodiment of the present invention (embodiment 1) The sub-process figure that nozzle course of injection in engine system is illustrated.

Fig. 6 is the band air throttle self-cleaning dress for representing another embodiment (embodiment 2) of the invention The schematic diagram for the engine system put.

Fig. 7 is the band air throttle self-stripping unit to another embodiment (embodiment 2) of the invention Engine system the flow chart that illustrates of control flow.

Fig. 8 is the band air throttle self-stripping unit to another embodiment (embodiment 2) of the invention Engine system in the sub-process figure that illustrates of gas collection process (the first space).

Fig. 9 is the band air throttle self-stripping unit to another embodiment (embodiment 2) of the invention Engine system in the sub-process figure that illustrates of gas collection process (the second collecting tank).

Figure 10 is the band air throttle self-stripping unit to another embodiment (embodiment 2) of the invention Engine system in the sub-process figure that illustrates of gas compression processes (the first space).

Figure 11 is the band air throttle self-stripping unit to a further embodiment of this invention (embodiment 3) Engine system in injection conditions judge and the sub-process that illustrates of follow-up nozzle course of injection Figure.

Figure 12 is the figure illustrated to the example that nozzle sprays enabled condition learning method.

Figure 13 is the schematic configuration diagram of the carbon distribution cleaning plant of prior art.

Embodiment

Hereinafter, referring to the drawings, to the engine system with air throttle self-stripping unit and section of the present invention Valve method for self-cleaning is illustrated.

(embodiment 1)

(engine system)

Reference picture 1, to the band air throttle self-stripping unit of an embodiment of the present invention (embodiment 1) The structure of 200 engine system 100 is described in detail.Fig. 1 is the belt segment for representing embodiment 1 The schematic diagram of the engine system 100 of valve self-stripping unit 200.

In Fig. 1, as engine system 100, the example of supercharged direct-injection engine system is shown, But the present invention is not limited to this or other including the engine system of naturally aspirated The engine system of type.Here, only being illustrated by taking supercharged direct-injection engine system as an example.

As shown in figure 1, the engine system 100 of the present invention includes air inlet 110, turbocharger 120th, charge air cooler 130, electronic throttle (ETC) 140, internal combustion engine 150, tail gas discharge system 160 Deng.

Gas flowmeter 111 is provided with above-mentioned air inlet 110, using above-mentioned gas flowmeter 111, It is capable of detecting when the air inflow from above-mentioned air inlet 110 into the entrance gas of engine system 100.

A certain amount of air enters turbocharger 120 from air inlet 110, and is passing through turbocharging After device 120 is pressurized, cooled down into charge air cooler 130, then pass through electronic throttle 140 Control and enter internal combustion engine 150.

In above-mentioned engine system 100, air throttle self-stripping unit 200, above-mentioned section are additionally provided with Valve self-stripping unit 200 as engine system 100 a part, by using from internal combustion engine 150 Crankcase 151 at collect gas, the carbon distribution and dirty material of throttle position are purged.

In the present embodiment, above-mentioned air throttle self-stripping unit 200 include the first collecting tank 210, Gas injection air inlet pipe 220, working gas air inlet pipe 230, gas injection discharge pipe 240 and work Gas outlet pipe 250.

Piston 211 is provided with above-mentioned first collecting tank 210, by the first collecting tank 210 Portion is divided into the first space 210A and second space 210B.

The first space is leaned in one end of above-mentioned gas injection air inlet pipe 220 with above-mentioned first collecting tank 210 The outer end wall connection of 210A sides, the other end is connected with the crankcase 151 of above-mentioned internal combustion engine 150, used Gas collection at the crankcase 151 by internal combustion engine 150 is to the first space of the first collecting tank 210 In 210A.

Second space is leaned in one end of above-mentioned working gas air inlet pipe 230 with above-mentioned first collecting tank 210 The outer end wall connection of 210B sides, the above-mentioned electronic throttle 140 of ratio that the other end is connected in inlet manifold More by airintake direction upstream side position at, for by electronic throttle in front of the door air inlet (unnecessary air inlet or Useless air inlet) collect to the second space 210B of the first collecting tank 210, and enter one using above-mentioned air inlet Walk and the gas being stored in the first space 210A of the first collecting tank 210 is compressed.

The first space is leaned in one end of above-mentioned gas injection discharge pipe 240 with above-mentioned first collecting tank 210 The outer end wall connection of 210A sides, is provided with nozzle 241, the nozzle 241 is stretched on an opposite end The above-mentioned electronic throttle 140 of ratio in inlet manifold is more leaned at the position of airintake direction upstream side, is used for Gas injection after the compression that will be stored in the first space 210A of the first collecting tank 210 is to electronics section The position of the airintake direction upstream side of valve 140, is carried out with the carbon distribution to throttle position and dirty material Remove.

Second space is leaned in one end of above-mentioned working gas discharge pipe 250 with above-mentioned first collecting tank 210 The outer end wall connection of 210B sides, the above-mentioned electronic throttle 140 of ratio that the other end is connected in inlet manifold At more by the position in airintake direction downstream, the second space of the first collecting tank 210 will be stored in Discharged in 210B into the inlet manifold of engine system 100.

The midway of above-mentioned gas injection air inlet pipe 220 is provided with open and close valve 221, in above-mentioned work gas The midway of body air inlet pipe 230 is provided with open and close valve 231, in the midway of above-mentioned gas injection discharge pipe 240 Open and close valve 242 is provided with, the midway of above-mentioned working gas discharge pipe 250 is provided with open and close valve 251.

(control flow)

Hereinafter, reference picture 2, to the engine with air throttle self-stripping unit 200 of embodiment 1 The air throttle method for self-cleaning of system 100 is illustrated.Fig. 2 be to the band air throttle of embodiment 1 from The flow chart that the control flow of the engine system 100 of cleaning device 200 is illustrated.

As shown in Fig. 2 after the engine started, normal vehicle operation (step S100).Now, State to electronic throttle 140 is detected (step S200).Then, to electronic throttle 140 Aperture judged (step S300).

When being judged as electronic throttle 140 in step S300, in crack state, (condition 1 has more It is that pressure in inlet manifold is less than a certain threshold value (the first setting) set in advance for body) when (in the case of being judged as " (condition 1) is " in step S300), carries out the first collecting tank 210 the first space 210A gas collection process (step S400), is then back to step S200, The aperture to electronic throttle 140 judges again.

When be judged as in step S300 electronic throttle 140 be in unexpected closure state (condition 2, More particularly it is that 140 unit interval of electronic throttle closing angle is more than a certain threshold value set in advance (the second setting)) when (in the case of being judged as " (condition 2) is " in step S300), Gas in first space 210A of the first collecting tank 210 is compressed (step S500), then Return to step S200, again the aperture to electronic throttle 140 judge.

When being judged as being unsatisfactory for condition 1 in step S300 while (i.e. in step during the condition 2 of being unsatisfactory for In the case of being judged as " non-(condition 1) and non-(condition 2) " in S300), to whether meeting spray The condition of penetrating is judged (step S600).

When the pressure being judged as in step S600 in gas injection discharge pipe 240 is more than in inlet manifold During maximum pressure value in certain time span (in the case of being judged as "Yes" in step S600), Using the nozzle 241 being arranged on the other end of gas injection discharge pipe 240, the first collection will be stored in The gas injection after compression in first space 210A of tank 210 is to the air inlet side of electronic throttle 140 Position to the upstream side, is purged that (nozzle sprayed with the carbon distribution and dirty material to throttle position Journey) (step S700), then terminate whole flow process.

On the other hand, when being judged as being unsatisfactory for injection conditions in step S600 (i.e. in step S600 In be judged as "No" in the case of), return to step S200, again opening to electronic throttle 140 Degree is judged.

Then, with reference to Fig. 3, Fig. 4, Fig. 5, to the band air throttle self-stripping unit 200 of embodiment 1 Engine system 100 in gas collection process S400, gas compression processes S500, nozzle injection Process S700 sub-process, and each open and close valve 221,231,242,251 in whole control flow Open and-shut mode illustrate.Fig. 3 is with air throttle self-stripping unit 200 to embodiment 1 The sub-process figure that gas collection process (the first space) S400 in engine system 100 is illustrated, Fig. 4 is the gas in the engine system 100 with air throttle self-stripping unit 200 to embodiment 1 The sub-process figure that body compression process (the first space) S500 is illustrated.Fig. 5 is real to the present invention one Apply the spray in the engine system 100 with air throttle self-stripping unit 200 of mode (embodiment 1) The sub-process figure that mouth course of injection S700 is illustrated.

In engine start, the process (step S100) of normal vehicle operation, located at above-mentioned injection Gas inlet pipe 220, working gas air inlet pipe 230, gas injection discharge pipe 240 and working gas Each open and close valve 221,231,242,251 of the midway of discharge pipe 250 is in the state closed.

(gas collection process (the first space))

When being judged as meeting condition 1 in step S300, as shown in figure 3, by open and close valve 221,251 Open, open and close valve 231,242 is closed into (step S410), then, using in inlet manifold Be located at than above-mentioned electronic throttle 140 more by the negative pressure at airintake direction downstream side position, will be located at Piston 211 in first collecting tank 210 is aspirated to second space 210B sides, so that from crankcase 151 It is middle by (step S420) in the first space 210A of gas collection to the first collecting tank 210, then return Return step S200.

(gas compression processes (the first space))

When being judged as meeting condition 2 in step S300, as shown in figure 4, open and close valve 231 is opened, Open and close valve 242 is closed, and open and close valve 221,251 is closed into (step S511).

Then, being located in inlet manifold is more leaned on into airintake direction upstream than above-mentioned electronic throttle 140 Gas collection at side position promotes piston 211 in the second space 210B of the first collecting tank 210, (step S512) is compressed to the air in the first space of the first collecting tank 210, is then returned to Step S200.

(nozzle course of injection)

In nozzle course of injection S700, first, the pressure in gas injection discharge pipe 240 is calculated (pressure in gas injection discharge pipe 240 can be detected in step S600) and inlet manifold In pressure (pressure in inlet manifold can equally be detected in step S600) between pressure Poor (step S710).

Then, the injection dutycycle (step S720) of delivery nozzle 241 is calculated.The injection of nozzle 241 The solenoid valve control by nozzle 241 is measured, mainly (gas injection is discharged by the pressure of nozzle location for it Pressure in pipe 240) and inlet manifold in pressure between the size of pressure differential determine, pressure differential Bigger, the unlatching dutycycle (i.e. aperture) of nozzle 241 is just smaller, on the contrary, pressure differential is smaller, spray The unlatching dutycycle (i.e. aperture) of mouth 241 is bigger.

Then, open and close valve 242 is opened, nozzle 241 is sprayed with the above-mentioned unlatching dutycycle calculated Penetrate (step S730).

The structure of (embodiment 1) according to an embodiment of the present invention, due to be provided with air throttle from Cleaning device 200 as engine system 100 a part, by using being located in inlet manifold Than electronic throttle 140 more by the gas at the side position of airintake direction upstream, to from internal combustion engine 150 The of the first collecting tank 210 of air throttle self-stripping unit 200 is collected and is stored at crankcase 151 Gas in one space 210A is compressed, and as defined in meet after condition by 241 pairs of nozzle The assigned position of electronic throttle 140 is sprayed, so as to using than the gas in inlet manifold The bigger gas of pressure is purged to the carbon distribution and dirty material at the assigned position of electronic throttle 140.

In addition, the air throttle method for self-cleaning of (embodiment 1) according to an embodiment of the present invention, leads to Cross being judged as being in crack state by electronic throttle 140 that (that is, pressure in inlet manifold is less than pre- The a certain threshold value (the first setting) first set) when, at the crankcase 151 of internal combustion engine 150 Gas is collected and is stored in the first sky of the first collecting tank 210 of air throttle self-stripping unit 200 Between in 210A, be judged as that electronic throttle 140 is in unexpected closure state (that is, electronic throttle 140 unit interval closing angles are more than a certain threshold value (the second setting) set in advance) when, utilize It is now placed in than electronic throttle 140 more by unnecessary (high pressure) at the side position of airintake direction upstream Air inlet, the first space 210A of the first collecting tank 210 to being stored in air throttle self-stripping unit 200 In gas be compressed, and injection conditions (that is, the gas injection discharge pipe 240 as defined in meet Interior pressure is more than the maximum pressure value in certain time span in inlet manifold) in the case of, pass through Nozzle 241 is sprayed the assigned position of electronic throttle 140, so as to not need external set It is standby and in the case of will not being negatively affected to the burning in cylinder body, automatically to electronic throttle 140 Cleaned, be purged with the carbon distribution and dirty material at the assigned position to electronic throttle 140.

In addition, the air throttle method for self-cleaning of (embodiment 1) according to an embodiment of the present invention, by In the main pressure between the pressure in the pressure and inlet manifold of nozzle location of emitted dose of nozzle 241 The size of power difference determines that the unlatching dutycycle for making nozzle to calculate sprayed, therefore, it is possible to So that nozzle realizes optimal jeting effect with minimum gas injection.

(embodiment 2)

(engine system)

Reference picture 6, the band air throttle self-cleaning to another embodiment (embodiment 2) of the invention is filled The engine system 100 ' for putting 200 ' is described in detail.Fig. 6 is the belt segment for representing embodiment 2 The schematic diagram of the engine system 100 ' of valve self-stripping unit 200 '.

In addition, in embodiment 2, for the part same or equivalent with embodiment 1, in reality Single quotation marks (' is added after the reference for the part for applying mode 1) it is indicated.

As shown in fig. 6, in above-mentioned engine system 100 ', being additionally provided with air throttle self-cleaning dress Put 200 ', above-mentioned air throttle self-stripping unit 200 ' as engine system 100 ' a part, By using the gas collected from the crankcase 151 ' of internal combustion engine 150 ', to the product of throttle position Carbon and dirty material are purged.

In the present embodiment, above-mentioned air throttle self-stripping unit 200 ' except with above-mentioned embodiment 1 Similarly include the first collecting tank 210 ', gas injection air inlet pipe 220 ', working gas air inlet pipe 230 ', Outside gas injection discharge pipe 240 ' and working gas discharge pipe 250 ', in addition to the second collecting tank (working gas collecting tank, air throttle excessive gas collecting tank) 260 ' and working gas collecting pipe 270’。

Piston 211 ' is provided with above-mentioned first collecting tank 210 ', by the first collecting tank 210 ' Inside be divided into the first space 210A ' and second space 210B '.

One end of above-mentioned gas injection air inlet pipe 220 ' is empty by first with above-mentioned first collecting tank 210 ' Between 210A ' sides outer end wall connection, the crankcase 151 ' of the other end and above-mentioned internal combustion engine 150 ' is even Connect, for by the gas collection at the place of crankcase 151 ' of internal combustion engine 150 ' to the first collecting tank 210 ' The first space 210A ' in.

One end of above-mentioned working gas air inlet pipe 230 ' is empty by second with above-mentioned first collecting tank 210 ' Between 210B ' sides outer end wall connection, the other end is connected to the exhaust end of the second collecting tank 260 ', The second sky for the air being stored in the second collecting tank 260 ' to be delivered to the first collecting tank 210 ' Between 210B ', and using above-mentioned air inlet further to being stored in the first space of the first collecting tank 210 ' Gas in 210A ' is compressed.

One end of above-mentioned gas injection discharge pipe 240 ' is empty by first with above-mentioned first collecting tank 210 ' Between 210A ' sides outer end wall connection, nozzle 241 ' is provided with an opposite end, the nozzle 241 ' The above-mentioned electronic throttle 140 ' of ratio stretched in inlet manifold more leans on the position of airintake direction upstream side Place, for the gas after the compression that will be stored in the first space 210A ' of the first collecting tank 210 ' The position of the airintake direction upstream side of electronic throttle 140 ' is ejected into, with the carbon distribution to throttle position It is purged with dirty material.

One end of above-mentioned working gas discharge pipe 250 ' is empty by second with above-mentioned first collecting tank 210 ' Between 210B ' sides outer end wall connection, the other end is connected to the above-mentioned electronic throttle of ratio in inlet manifold Door 140 ' more by the position in airintake direction downstream at, the of the first collecting tank 210 ' will be stored in Release is into the inlet manifold of engine system 100 ' in two space 210B '.

One end of above-mentioned working gas collecting pipe 270 ' is connected with the inlet end of the second collecting tank 260 ', The above-mentioned electronic throttle 140 ' of ratio that the other end is connected in inlet manifold more leans on airintake direction upstream side At position, for the air inlet (unnecessary air inlet or useless air inlet) of electronic throttle in front of the door to be collected to second In collecting tank 260 '.

In the same manner as embodiment 1, it is provided with out in the midway of above-mentioned gas injection air inlet pipe 220 ' Valve closing 221 ', open and close valve 231 ' is provided with the midway of above-mentioned working gas air inlet pipe 230 ', The midway of above-mentioned gas injection discharge pipe 240 ' is provided with open and close valve 242 ', in above-mentioned working gas row The midway of outlet pipe 250 ' is provided with open and close valve 251 '.In addition, in above-mentioned working gas collecting pipe 270 ' Midway be provided with open and close valve 271 '.

(control flow)

Hereinafter, reference picture 7, to the engine of the band air throttle self-stripping unit 200 ' of embodiment 2 The control flow of system 100 ' is illustrated.Fig. 7 is the band air throttle self-cleaning dress to embodiment 2 Put the flow chart that the control flow of 200 ' engine system 100 ' is illustrated.

As shown in fig. 7, after the engine started, normal vehicle operation (step S100 ').Now, State to electronic throttle 140 ' is detected (step S200 ').Then, to electronic throttle The aperture of door 140 ' is judged (step S300 ').

When be judged as in step S300 ' electronic throttle 140 ' be in crack state (condition 1 ', More particularly it is that pressure in inlet manifold is less than a certain threshold value (the first setting) set in advance) When (in the case of being judged as " (condition 1 ') is " in step S300 '), carry out first First space 210A ' of collecting tank 210 ' gas collection process (step S400 '), is then returned Step S200 ' is returned, the aperture to electronic throttle 140 ' judges again.

When be judged as in step S300 ' electronic throttle 140 ' be in unexpected closure state (condition 2 ', more particularly, be the unit interval of electronic throttle 140 ' closing angle be more than it is set in advance A certain threshold value (the second setting)) when (be judged as in step S300 ' " (condition 2 ') It is " in the case of), the gas collection process (step S800 ') of the second collecting tank 260 ' is carried out, Step S200 ' is then back to, the aperture to electronic throttle 140 ' judges again.

When being judged as being unsatisfactory for condition 1 in step S300 ' while (i.e. in step during the condition 2 of being unsatisfactory for In the case of being judged as " non-(condition 1 ') and non-(condition 2 ') " in rapid S300 '), to the Gas in first space 210A ' of one collecting tank 210 ' is compressed (step S500 '), so Return to step S200 ' afterwards, again the aperture to electronic throttle 140 ' judge, then to being The no injection conditions that meets is judged (step S600 ').

When the pressure being judged as in step S600 ' in gas injection discharge pipe 240 ' is more than air inlet discrimination (it is judged as "Yes" in step S600 ' during maximum pressure value in certain time span in pipe In the case of), will using the nozzle 241 ' being arranged on the other end of gas injection discharge pipe 240 ' The gas injection after the compression in the first space 210A ' of the first collecting tank 210 ' is stored in electronics The position of the airintake direction upstream side of air throttle 140 ', is entered with the carbon distribution and dirty material to throttle position Row removes (nozzle course of injection) (step S700 '), then terminates whole flow process.

On the other hand, when being judged as being unsatisfactory for injection conditions in step S600 ' (i.e. in step In the case of being judged as "No" in S600 '), return to step S200 ', again to electronic throttle 140 ' aperture is judged.

Then, with reference to Fig. 8, Fig. 9, Figure 10, to the band air throttle self-stripping unit of embodiment 2 Each gas collection process S400 ', S800 ', gas compression in 200 ' engine system 100 ' Process S500 ' sub-process, and in whole control flow each open and close valve 221 ', 231 ', 242 ', 251 ', 271 ' open and-shut mode is illustrated.Fig. 8 is from clear to the band air throttle of embodiment 2 Gas collection process (the first space) S400 ' in the engine system 100 ' of cleaning device 200 ' enters The sub-process figure of row explanation, Fig. 9 is the hair to the band air throttle self-stripping unit 200 ' of embodiment 2 The sub-process that gas collection process (the second collecting tank) S800 ' in motivation system 100 ' is illustrated, During Figure 10 is the engine system 100 ' to the band air throttle self-stripping unit 200 ' of embodiment 2 The sub-process figures that illustrate of gas compression processes (the first space) S500 '.

In addition, in nozzle course of injection S700 ', due to the nozzle course of injection with embodiment 1 S700 is identical, therefore, and the nozzle course of injection in present embodiment can be understood with reference to reference picture 5 S700’。

In engine start, the process (step S200 ') of normal vehicle operation, located at above-mentioned spray Penetrate gas inlet pipe 220 ', working gas air inlet pipe 230 ', gas injection discharge pipe 240 ', work Make gas outlet pipe 250 ' and the midway of working gas collecting pipe 270 ' each open and close valve 221 ', 231 ', 242 ', 251 ', 271 ' are in the state of closing.

(gas collection process (the first space))

When being judged as meeting condition 1 ' in step S300 ', as shown in figure 8, by open and close valve 221 ', 251 ' are opened, and open and close valve 231 ', 242 ', 271 ' is closed into (step S410 '), then, Utilize being located at than above-mentioned electronic throttle 140 ' more by airintake direction downstream position in inlet manifold The negative pressure at place is put, by the piston 211 ' in the first collecting tank 210 to second space 210B ' one Side is aspirated, so that by the first space of gas collection to the first collecting tank 210 ' from crankcase 151 ' In 210A ' (step S420 '), step S200 ' is then returned to.

(gas collection process (second gas collecting tank))

When being judged as meeting condition 2 ' in step S300 ', as shown in figure 9, by open and close valve 271 ' Open, open and close valve 221 ', 251 ' is closed, and open and close valve 231 ', 242 ' is closed into (step Rapid S810 '), then, by (step in the gas collection in inlet manifold to the second collecting tank 260 ' Rapid S820 ').

(gas compression processes (the first space))

When being judged as being unsatisfactory for condition 1 ' in step S300 ' and being unsatisfactory for condition 2 ', such as Figure 10 It is shown, by open and close valve 231 ' open, by open and close valve 242 ' close, and by open and close valve 221 ', 251 ' close (step S510 ').Now, open and close valve 271 ' can both be closed, can also be by Open and close valve 271 ' is opened.But preferably open and close valve 271 ' is closed.

Then, the gas being stored in the second collecting tank 260 ' is delivered to the first collecting tank 210 ' In second space 210B ', piston 211 ' is promoted, in the first space of the first collecting tank 210 ' Gas is compressed (step S520 '), subsequently enters step S600 '.

According to the structure of another embodiment (embodiment 2) of the invention, due to being provided with air throttle Self-stripping unit 200 ' as engine system 100 ' a part, by by the position of inlet manifold More received in than electronic throttle 140 ' by unnecessary (high pressure) air inlet at the side position of airintake direction upstream Collect and be stored in the second collecting tank 260 ' of air throttle self-stripping unit 200 ', and existed using collection Gas in second collecting tank 260 ' from the crankcase 151 ' of internal combustion engine 150 ' to collecting and storing Gas in the first space 210A ' of the first collecting tank 210 ' of air throttle self-stripping unit 200 ' Be compressed, and as defined in meet after condition by nozzle 241 ' to electronic throttle 140 ' Assigned position is sprayed, so as to because electronic throttle reduces suddenly and the useless air inlet of abruptly increase Amount is collected, compared with the situation of embodiment 1, can utilize the gas of collected bigger pressure Body is to collecting and being stored in the first space of the first collecting tank 210 ' of air throttle self-stripping unit 200 ' Gas in 210A ' is compressed, so as to the higher gas of compression degree to electronic throttle Carbon distribution and dirty material at 140 ' assigned position are purged.

In addition, according to the air throttle method for self-cleaning of another embodiment (embodiment 2) of the invention, By the way that being judged as electronic throttle 140 ', in crack state, (that is, the pressure in inlet manifold is less than A certain threshold value (the first setting) set in advance) when, to the crankcase 151 ' of internal combustion engine 150 ' The gas at place is collected and is stored in the first collecting tank 210 ' of air throttle self-stripping unit 200 ' In first space 210A ', it is being judged as electronic throttle 140 ' in unexpected closure state (i.e., The unit interval of electronic throttle 140 ' closing angle is more than a certain threshold value set in advance (the second regulation Value)) when, by because of the reduction suddenly of electronic throttle 140 ', the useless air inflow of abruptly increase is collected simultaneously It is stored in the second collecting tank 260 ' of air throttle self-stripping unit 200 ', is then able to utilize collection The gas of the bigger pressure got up is to being stored in the first collecting tank 210 ' of air throttle self-stripping unit 200 ' The first space 210A ' in gas be compressed, and meet as defined in injection conditions (that is, spray The pressure in gas outlet pipe 240 ' is penetrated more than the maximum pressure in certain time span in inlet manifold Value) in the case of, the assigned position of electronic throttle 140 ' is sprayed by nozzle 241 ', So that compared with embodiment 1, can be with the higher gas of compression degree to electronic throttle 140 ' Carbon distribution and dirty material at assigned position are purged, and elimination efficiency is higher.

(embodiment 3)

Hereinafter, to the engine system 100 ' of the band air throttle self-stripping unit 200 ' of embodiment 3 Control flow illustrate.

It is substantially completely identical with the control flow of the embodiment 2 shown in Fig. 7 in embodiment 3, Here, only pair being illustrated with the difference of embodiment 2, for identical flow and part, make With with the identical reference of embodiment 2, and no longer repeated.

Embodiment 3 is different with embodiment 2 in injection conditions judgement.Specifically, exist In above-mentioned embodiment 2 (and embodiment 1), the judgement of injection conditions is gas injection discharge pipe Whether the pressure in 240 is more than the maximum pressure value in inlet manifold in certain time span, still, In present embodiment 3, the judgement of injection conditions is whether to complete nozzle injection enabled condition study and sentence Whether the pressure in disconnected inlet manifold is more than learning value.Figure 11 is (real to a further embodiment of this invention Apply mode 3) band air throttle self-stripping unit 200 ' engine system 100 ' in injection conditions Judge the sub-process that (step S600 ") and follow-up nozzle course of injection (S700 ') are illustrated Figure.

(injection conditions judges and nozzle course of injection)

In injection conditions judges S600 ", (step first, is detected to the pressure in inlet manifold Rapid S610 ").

Then, to whether complete nozzle injection enabled condition study judged (step S620 "). Here, being illustrated with reference to Figure 12 to nozzle injection enabled condition learning method.Figure 12 is to nozzle The figure that one example of injection enabled condition learning method is illustrated.

It is located at fully open position, or the position electricity within the unit interval when detecting pedal position sensor When pressing acute variation, ECU thinks that air- distributor pressure reaches that the condition of maximum has been reached (i.e. in step It is judged as the situation of "Yes" (completing the study of nozzle injection enabled condition) in S620 ").

Now, the pressure value of inlet manifold is updated and arrives learning value (step S630 ").Similarly, When meeting above-mentioned condition after, it is considered to complete nozzle injection enabled condition study.

In the illustration in fig 12, in inlet manifold when what curve was represented is the change of electronic throttle aperture Pressure value, point represent is self study updated value.

On the other hand, it is judged as not completing the study of nozzle injection enabled condition (i.e. in step S620 " In the case of being judged as "No" in step S620 "), return to step S200 '.

It is whether big to the pressure in inlet manifold after the pressure value of inlet manifold is updated to learning value Judged (step S640 ") in learning value.

(exist when the pressure being judged as in step S640 " in inlet manifold is less than or equal to learning value In the case of being judged as "No" in step S640 "), return to step S620 ", again to whether complete Judged into nozzle injection enabled condition study.

On the other hand, when the pressure being judged as in step S640 " in inlet manifold is more than learning value (in the case of being judged as "Yes" in step S640 "), carries out nozzle course of injection S700 ".

In nozzle course of injection S700 ", first, calculate in gas injection discharge pipe 240 ' Pressure differential (step S710 ") between pressure in pressure and inlet manifold.

Then, the injection dutycycle (step S720 ") of delivery nozzle 241 ' is calculated.Nozzle 241 ' Emitted dose by nozzle 241 ' solenoid valve control, its mainly by nozzle location pressure (injection gas Pressure in body discharge pipe 240 ') and inlet manifold in pressure between the size of pressure differential determine, Pressure differential is bigger, and the unlatching dutycycle (i.e. aperture) of nozzle 241 ' is just smaller, on the contrary, pressure differential is got over Small, the unlatching dutycycle (i.e. aperture) of nozzle 241 ' is bigger.

Then, open and close valve 242 ' is opened, nozzle 241 ' is carried out with the above-mentioned unlatching dutycycle calculated Spray (step S730 ").

According to the air throttle method for self-cleaning of a further embodiment of this invention (embodiment 3), due to The air throttle method for self-cleaning of embodiment 2 is compared, and spray is added in injection conditions judges S600 " The self-learning method of injection pressure permissible value, therefore, the technology except above-mentioned embodiment 2 can be realized Outside effect, above-mentioned learning value constantly can learn and update along with the change of the pressure of inlet manifold, Thus can be according to the difference of the driving habit of driver, increase or frequency and the week for reducing nozzle injection Phase, nozzle is equally enabled to realize optimal jeting effect with minimum gas injection in addition.

The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that of the invention implements simultaneously It is not limited to the embodiments described above.Those skilled in the art will be readily apparent other advantages and Modification.Therefore, in its wider range of aspect, the present invention is not limited to depicted herein and retouched The detail and representative embodiment stated.Therefore, it can not departing from such as appended claims and Various modification can be adapted on the premise of the spirit or scope of this general inventive concept that its equivalent is limited.

For example, in the explanation of above-mentioned embodiment 3, based on embodiment 2, illustrating The situation for obtaining embodiment 3 is improved in embodiment 2, but the present invention is not limited to this, Above-mentioned improvement can be carried out in embodiment 1 based on embodiment 1.

In addition, in above-mentioned embodiment 1 and embodiment 2, to without the second collecting tank (work Make gas collection tank, air throttle excessive gas collecting tank) and with second collecting tank 260 ' Situation is illustrated respectively, but the present invention is not limited to this, it is possible to have multiple second collecting tanks. , can be different according to the pressure of wanted gas injection in the case of with multiple second collecting tanks, (point Level) using one or more to being stored in the first space 210A of the first collecting tank 210 Gas is compressed, to obtain the gas injection of different pressures level.

In addition, in above-mentioned 1~embodiment of embodiment 3, being stretched to nozzle 241,241 ' Ratio electronic throttle 140,140 ' in inlet manifold is more leaned at the position of airintake direction upstream side, is used Gas injection after the compression that will be stored in the first space (210A) of the first collecting tank (210) To the position of the airintake direction upstream side of electronic throttle (140), with the carbon distribution to throttle position and The situation that dirty material is purged is illustrated, but the present invention is not limited to this, such as in order to remove product Necessity of carbon, the ratio electronic throttle that can also be stretched to nozzle in inlet manifold more leans on airintake direction At the position in downstream.

Claims (12)

1. a kind of engine system (100,100 ') with air throttle self-stripping unit (200,200 '), Characterized in that,

The air throttle self-stripping unit (200,200 ') is used as the engine system (100,100 ') Internal portions, including the first collecting tank (210,210 ') and nozzle (241,241 '), Piston (211,211 ') is provided with first collecting tank (210,210 '), by institute State the first collecting tank (210,210 ') inside be divided into the first space (210A, 210A ') and Second space (210B, 210B '), the internal combustion engine from the engine system (100,100 ') Crankcase (151, the 151 ') place of (150,150 ') is by gas collection to first collecting tank First space (210A, 210A ') of (210,210 '), and to first collecting tank (210, 210 ') the gas in the first space (210A, 210A ') is compressed, so as to utilize the spray Mouth (241,241 ') is by the gas injection after compression to the engine system (100,100 ') Inlet manifold in be located at than electronic throttle (140,140 ') more by airintake direction upstream side or The position in downstream, to be cleaned to the electronic throttle (140).

2. the engine system as claimed in claim 1 with air throttle self-stripping unit (200) (100), it is characterised in that

The air throttle self-stripping unit (200) of the engine system (100) also includes injection Gas inlet pipe (220), working gas air inlet pipe (230), gas injection discharge pipe (240) with And working gas discharge pipe (250),

Institute is leaned in one end of the gas injection air inlet pipe (220) with first collecting tank (210) State the outer end wall connection of the first space (210A) side, the song of the other end and the internal combustion engine (150) Axle box (151) is connected,

Institute is leaned in one end of the working gas air inlet pipe (230) with first collecting tank (210) The outer end wall connection of second space (210B) side is stated, the other end is connected in the inlet manifold More leaned on than the electronic throttle (140) at the position of airintake direction upstream side,

Institute is leaned in one end of the gas injection discharge pipe (240) with first collecting tank (210) The outer end wall connection of the first space (210A) side is stated, the nozzle (241) is arranged on the injection The other end of gas outlet pipe (240),

Institute is leaned in one end of the working gas discharge pipe (250) with first collecting tank (210) The outer end wall connection of second space (210B) side is stated, the other end is connected in the inlet manifold More leaned on than the electronic throttle (140) at the position in airintake direction downstream,

In the gas injection air inlet pipe (220), the working gas air inlet pipe (230), described The midway of gas injection discharge pipe (240) and the working gas discharge pipe (250) is set respectively There is open and close valve (221,231,242,251),

Airintake direction upstream is more leaned on using from electronic throttle (140) described in the ratio in the inlet manifold The gas collected at the position of side is working gas, to the first space of first collecting tank (210) Gas in (210A) is compressed.

3. the engine system as claimed in claim 1 with air throttle self-stripping unit (200 ') (100 '), it is characterised in that

The air throttle self-stripping unit (200 ') of the engine system (100 ') also includes Gas injection air inlet pipe (220 '), working gas air inlet pipe (230 '), gas injection discharge pipe (240 '), working gas discharge pipe (250 '), the second collecting tank (260 ') and work gas Body collecting pipe (270 '),

One end of the gas injection air inlet pipe (220 ') and first collecting tank (210 ') By the outer end wall connection of the first space (210A ') side, the other end and the internal combustion engine (150 ') Crankcase (151 ') connection,

One end of the working gas air inlet pipe (230 ') and first collecting tank (210 ') By the outer end wall connection of the second space (210B ') side, the other end is connected to described second and received Collect the exhaust end of tank (260 '),

One end of the gas injection discharge pipe (240 ') and first collecting tank (210 ') By the outer end wall connection of the first space (210A ') side, the nozzle (241 ') is arranged on The other end of the gas injection discharge pipe (240 '),

One end of the working gas discharge pipe (250 ') and first collecting tank (210 ') By the outer end wall connection of the second space (210B ') side, the other end is connected to the air inlet discrimination Electronic throttle (140 ') described in ratio in pipe is more leaned at the position in airintake direction downstream,

One end of the working gas collecting pipe (270 ') and second collecting tank (260 ') Inlet end is connected, and the other end is connected to electronic throttle (140 ') described in ratio in the inlet manifold At more by the position of airintake direction upstream side,

The gas injection air inlet pipe (220 '), the working gas air inlet pipe (230 '), The gas injection discharge pipe (240 '), the working gas discharge pipe (250 ') and work The midway of gas-collecting pipe (270 ') be respectively arranged with open and close valve (221 ', 231 ', 242 ', 251 ', 271 '),

Airintake direction upstream will be more leaned on from electronic throttle (140 ') described in the ratio in the inlet manifold Gas collection at the position of side as working gas, utilizes receipts to second collecting tank (260 ') Collect the working gas in second collecting tank (260 ') to first collecting tank (210 ') The first space (210A ') in gas be compressed.

4. as claimed in claim 2 or claim 3 with air throttle self-stripping unit (200,200 ') Engine system (100,100 '), it is characterised in that

Electronic throttle described in the ratio that the nozzle (241,241 ') is stretched in the inlet manifold (140,140 ') are more leaned at the position of airintake direction upstream side.

5. a kind of engine system as claimed in claim 2 with air throttle self-stripping unit (200) The air throttle method for self-cleaning of system (100), it is characterised in that including：

The throttle conditions detection process that state to electronic throttle (140) is detected；

The throttle opening deterministic process judged electronic throttle (140) aperture；

By crankcase (151) place of the internal combustion engine (150) of the engine system (100) by gas Collect to the first space of the first collecting tank (210) of the band air throttle self-stripping unit (200) The gas injection of (210A) collects process；

Airintake direction upstream is more leaned on using from electronic throttle (140) described in the ratio in the inlet manifold The gas collected at the position of side is working gas, to the first space of first collecting tank (210) The gas compression processes that gas in (210A) is compressed；And

In the case where meeting injection conditions, using being arranged on the another of gas injection discharge pipe (240) Nozzle (241) on end, will be stored in first space (210A) of first collecting tank (210) Gas injection being located at than electricity into the inlet manifold of the engine system (100) after interior compression Nozzle course of injection of the sub- air throttle (140) more by airintake direction upstream side or the position in downstream,

In throttle opening deterministic process,

It is less than the first setting set in advance, i.e. first when meeting the pressure in the inlet manifold During condition, carry out the gas injection and collect process,

It is more than set in advance the when meeting the electronic throttle (140) unit interval closing angle Two settings, i.e. second condition when, carry out the gas compression processes,

When being unsatisfactory for the first condition and being unsatisfactory for the second condition, the spray to the nozzle The condition of penetrating judged, and carries out when meeting the injection conditions nozzle course of injection.

6. a kind of engine as claimed in claim 3 with air throttle self-stripping unit (200 ') The air throttle method for self-cleaning of system (100 '), it is characterised in that including：

The throttle conditions detection process that state to electronic throttle (140 ') is detected；

The throttle opening deterministic process judged electronic throttle (140 ') aperture；

By crankcase (151 ') place of the internal combustion engine (150 ') of the engine system (100 ') By the first collecting tank (210 ') of gas collection to the band air throttle self-stripping unit (200 ') The first space (210A ') gas injection collect process；

Electronic throttle (140 ') described in ratio in the inlet manifold is more leaned on into airintake direction upstream side Position at gas as working gas collect work gas in second collecting tank (260 ') Body collects process；

Using the working gas in second collecting tank (260 ') is collected, to described first The gas compression processes that gas in the first space (210A ') of collecting tank (210 ') is compressed； And

In the case where meeting injection conditions, using being arranged on the another of gas injection discharge pipe (240 ') Nozzle (241 ') on one end, will be stored in described the first of first collecting tank (210 ') The air inlet of the gas injection after compression in space (210A ') to the engine system (100 ') Being located at than electronic throttle (140 ') more by airintake direction upstream side or the position in downstream in manifold Nozzle course of injection,

In throttle opening deterministic process,

It is less than the first setting set in advance, i.e. first when meeting the pressure in the inlet manifold During condition, carry out the gas injection and collect process,

It is more than set in advance the when meeting the electronic throttle (140) unit interval closing angle Two settings, i.e. second condition when, carry out the working gas and collect process；

When being unsatisfactory for the first condition and being unsatisfactory for the second condition, the gas pressure is carried out Compression process, then judges the injection conditions of the nozzle, and when meeting the injection conditions Carry out the nozzle course of injection.

7. the air throttle method for self-cleaning as described in claim 5 or 6, it is characterised in that

During gas injection collection, the gas injection air inlet pipe (220,220 ') will be located at And working gas discharge pipe (250, the 250 ') midway open and close valve (221,251,221 ', 251 ') open, the working gas air inlet pipe (230) and the gas injection discharge pipe will be located at Or the working gas air inlet pipe (230 '), the gas injection discharge pipe (240 ') (240) And working gas collecting pipe (the 270 ') midway open and close valve (231,242,231 ', 242 ', 271 ') close, then, by the gas collection at the crankcase (151,151 ') place to described the In first space (210A, 210A ') of one collecting tank (210,210 ').

8. air throttle method for self-cleaning as claimed in claim 6, it is characterised in that

During working gas collection, it will be located in the working gas collecting pipe (270 ') The open and close valve (271 ') on way is opened, will be located at the gas injection air inlet pipe (220 '), described Working gas air inlet pipe (230 '), the gas injection discharge pipe (240 ') and the work The open and close valve (221 ', 231 ', 242 ', 251 ') of gas outlet pipe (250 ') midway is closed, Then, by the gas collection in inlet manifold to second collecting tank (260 ').

9. the air throttle method for self-cleaning as described in claim 5 or 6, it is characterised in that

In the gas compression processes, the working gas air inlet pipe (230,230 ') will be located at The open and close valve (231,231 ') of midway is opened, will located at the gas injection air inlet pipe (220,220 '), The gas injection discharge pipe (240,240 ') and the working gas discharge pipe (250,250 ') The open and close valve (221,242,251,221 ', 242 ', 251 ') of midway is closed, using described Working fluid promotes the piston (211,211 ') located at first collecting tank (210,210 '), To the gas in the first space of first collecting tank (210,210 ') (210A, 210A ') It is compressed.

10. the air throttle method for self-cleaning as described in claim 5 or 6, it is characterised in that

In the nozzle course of injection, the gas injection discharge pipe (240,240 ') is calculated The pressure differential between pressure in interior pressure and the inlet manifold, then calculate the nozzle (241, 241 ') injection dutycycle, is opened located at the gas injection discharge pipe (240,240 ') midway Open and close valve (242,242 '), make the nozzle (241,241 ') with the nozzle dutycycle Injection.

11. the air throttle method for self-cleaning as described in claim 5 or 6, it is characterised in that

The injection conditions of the nozzle (241,241 ') is in the gas injection discharge pipe (240) Pressure be more than maximum pressure value in the inlet manifold in certain time span.

12. the air throttle method for self-cleaning as described in claim 5 or 6, it is characterised in that

The injection conditions of the nozzle (241,241 ') be complete nozzle injection enabled condition study and Pressure in the inlet manifold is more than learning value,

It is located at fully open position, or the position electricity within the unit interval when detecting pedal position sensor Acute variation is pressed, is judged as completing the nozzle injection enabled condition study.