CN101694175A - Method and device for reducing pollution from exhaust emission of internal combustion engine - Google Patents
Method and device for reducing pollution from exhaust emission of internal combustion engine Download PDFInfo
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- CN101694175A CN101694175A CN200910191165A CN200910191165A CN101694175A CN 101694175 A CN101694175 A CN 101694175A CN 200910191165 A CN200910191165 A CN 200910191165A CN 200910191165 A CN200910191165 A CN 200910191165A CN 101694175 A CN101694175 A CN 101694175A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a method and a device for reducing pollution from exhaust emission of an internal combustion engine. A device used for reserving air is arranged between a crank case and an exhaust silencer of the internal combustion engine; an air inlet of an air reservation cavity of the device used for reserving air is provided with a first check valve; the crank case and the exhaust silencer of the internal combustion engine are respectively communicated with the air reservation cavity through an air passage; and the air passage communicated between the exhaust silencer and the air reservation cavity is provided with a second check valve. By using the alternative positive and negative pressure generated in the crank case when a piston of the internal combustion engine moves, specifically by using the negative pressure generated in the crank case when the piston moves up, fresh air is sucked into the device used for reserving air until reserved sufficiently; and by using the positive pressure generated in the crank case when the piston moves down, the fresh air reserved in the device used for reserving air is delivered to the exhaust silencer of the internal combustion engine so that the HC, CO and NOx in the high temperature waste gas exhausted by the internal combustion engine adequately first react with abundant oxygen chemically, and then the waste gas is discharged, thus greatly reducing the pollution from exhaust emission of the internal combustion engine.
Description
Technical field
The present invention relates to engine exhaust gas discharging field, particularly a kind of method and device that reduces pollution from exhaust emission of internal combustion engine.
Background technique
If pollution from exhaust emission owner NOx, HC, CO and the particulate matter of internal-combustion engine, consciousness raising along with environmental protection, the atmospheric pollution that causes for the toxic emission that reduces because of internal-combustion engine, the common employing of present internal-combustion engine is provided with three-way catalyst and carries out reprocessing in the silencing apparatus of discharging waste gas, oxidation HC and CO, reducing NOx is to reduce HC, CO, the NOx content in the exhaust gas discharged; But, the oxygen content of discharging after burning in the tail gas of motor is few, the oxidation of HC, CO, NOx or reduce insufficient, just need be to the additional air of tail gas, increase the content of oxygen in the tail gas, to impel HC, CO, NOx abundant oxidation or the reduction under the three-way catalyst effect.Yet, the method that reduces the engine exhaust gas discharging at present all is to adopt negative pressure type secondary air compensating method, promptly the outlet pipe at internal-combustion engine is provided with secondary air-supplementing valve, and the negative pressure of utilizing engine exhaust to produce sucks fresh air by secondary air-supplementing valve, replenishes air in outlet pipe.Because the pressure that forms in the outlet pipe during engine exhaust is fluctuation pressure, open at exhaust valve, the gas that piston stroking upward in the cylinder promotes after the burning discharges through outlet pipe, at this moment the air pressure in the outlet pipe pipe is malleation, when exhaust valve closing, form the moment negative pressure in the outlet pipe, sucking fresh air by secondary air-supplementing valve is waste gas oxygenating in the outlet pipe, but, during because of engine exhaust, this fluctuation pressure is very asymmetric, and the malleation in the outlet pipe is much larger than negative pressure, and the endurance of malleation is longer, the endurance of negative pressure is extremely short, causes the magnitude of recruitment of fresh air very small, makes the oxygen deficiency that participates in oxidation reaction, HC in the waste gas, CO can not can't be effectively reduced discharging pollutants of motor by sufficient oxidation.And adopt existing negative pressure type secondary air compensating method to reduce engine exhaust emission, and high-quality three-way catalyst must be relied on, and three-way catalyst must be regularly replaced, cause the cost up that reduces toxic emission thus; But since by moment the oxygen that replenishes of negative pressure few, even adopt high-quality three-way catalyst also to be difficult to reach the waste gas emission standard that developed country formulates; Especially the motor of some little discharge capacities, even adopted high-quality three-way catalyst, also can't reach the waste gas emission standard that developed country formulates at all, the discharge amount of HC+NOx also has 8～10g/kWh in its waste gas, the discharge amount of CO also has 350～450g/kWh, and having a strong impact on the internal-combustion engine is the machinery sale in the world of power.How to reduce the engine exhaust gas discharging effectively, satisfy the waste gas emission standard of high request, be the engine building issue to be resolved for a long time, but fail to find the effective ways that address this problem always.
Summary of the invention
The objective of the invention is deficiency at the prior art existence, a kind of method that reduces pollution from exhaust emission of internal combustion engine is provided, the positive and negative alternative pressure that it utilizes the piston motion of internal-combustion engine to produce in crankcase, in exhaust silencer, force the malleation tonifying Qi, provide sufficient oxygen and the HC in the high-temp waste gas, CO, NOx to carry out sufficient chemical reaction, greatly reduce pollution from exhaust emission of internal combustion engine.
Another purpose of the present invention is the deficiency that exists at prior art, a kind of device that reduces pollution from exhaust emission of internal combustion engine is provided, it is provided for laying in the device of air between the crankcase of internal-combustion engine and exhaust silencer, be communicated with respectively with crankcase and exhaust silencer, the negative pressure that produces in the crankcase when up by the piston motion of internal-combustion engine, fresh air is sucked a device deposit abundance that is used for laying in air, produce malleation in the crankcase by piston motion when descending, to be used for laying in the fresh air that the device of air lays in delivers in the exhaust silencer of internal-combustion engine, make the HC in the high-temp waste gas that internal-combustion engine discharges, CO, NOx carries out giving off behind the sufficient chemical reaction with the oxygen of abundance again, greatly reduces pollution from exhaust emission of internal combustion engine.
The inventive method is achieved in that the positive and negative alternative pressure that this method utilizes the piston motion of internal-combustion engine to produce in crankcase, the negative pressure that produces in the crankcase when up by piston motion, fresh air is sucked a device deposit abundance that is used for laying in air, produce malleation in the crankcase by piston motion when descending, to be used for laying in the fresh air that the device of air lays in and deliver in the exhaust silencer of internal-combustion engine, and make HC, CO, NOx in the high-temp waste gas that internal-combustion engine discharges carry out giving off again behind the sufficient chemical reaction with the oxygen of abundance.
Owing to adopted such scheme, the positive and negative alternative pressure that utilizes the piston motion of internal-combustion engine in crankcase, to produce, because of piston motion produces the malleation of about 10kPa or the negative pressure of pact-10kPa, its negative pressure can suck the fresh air of abundance the device that be used for laying in air and lay in, its malleation can be delivered to the sufficient fresh air of deposit in the exhaust silencer of internal-combustion engine, HC in the high-temp waste gas that can make the internal-combustion engine discharge in silencing apparatus is provided, CO, NOx produces the oxygen of abundant chemical reaction, make the HC in the exhaust emissions from internal combustion engines, CO, NOx content is reduced greatly, the discharge amount of HC+NOx in the exhaust gas of internal combustion engines is reduced to 3～5g/kWh, the discharge amount of CO is reduced to 150～250g/kWh, well below adopting existing negative pressure type secondary air compensating, thereby can satisfy the emission regulation demands of various countries' strictness easily in conjunction with the HC+NOx of the reduction engine exhaust emission method of high-quality three-way catalyst and the discharge amount of CO.
Apparatus of the present invention are achieved in that the device that is provided for laying in air between the crankcase of internal-combustion engine and exhaust silencer, the described device that is used to lay in air comprises the air reserve chamber, the air reserve chamber is provided with the air inlet hole, this place, air inlet hole is provided with first one-way valve, the crankcase of internal-combustion engine, exhaust silencer are communicated with the air reserve chamber of the device be used to lay in air respectively by air flue, the air flue that exhaust silencer is communicated with the air reserve chamber is provided with second one-way valve.
Described first one-way valve is the one-way valve that negative pressure is opened.
Described second one-way valve is the one-way valve that malleation is opened.
Described first one-way valve, second one-way valve are the reed-type one-way valve.
Also three-way catalyst can be set in the described exhaust silencer.
Owing to adopted such scheme, between the crankcase of internal-combustion engine and exhaust silencer, be provided for laying in the device of air, therefore can the air reserve chamber be set at the device that is used to lay in air, this air reserve chamber can be laid in sufficient fresh air and be provided enough oxygen for reducing pollution from exhaust emission.The crankcase of internal-combustion engine, exhaust silencer is communicated with the air reserve chamber of the device be used to lay in air respectively by air flue, piston motion when making internal combustion engine is just as an air pump, in the up process crankcase of piston motion, produce powerful negative pressure, outside fresh air is sucked deposit in the air reserve chamber in a large number by the device that is used to lay in air, the magnitude of recruitment of the fresh air that the moment negative pressure suction air of fluctuation pressure causes when having solved existing secondary air compensating method by I. C. engine exhaust is very small, make the oxygen deficiency that participates in chemical reaction, HC in the waste gas, CO can not can not fully be reduced by oxidation fully or NOx, can't effectively reduce the problem of pollution from exhaust emission thing; And in the descending process crankcase of piston motion, produce powerful malleation, fresh air sufficient in the air reserve chamber is pressed in the exhaust silencer, to guarantee to participate in the oxygen abundance of chemical reaction, allow HC, CO in the high-temp waste gas, the NOx can fully oxidation or reduction in the presence of a large amount of oxygen, make the toxic emission of internal-combustion engine reach the exhaust emission regulations standard of developed country.Described air reserve chamber is provided with the air inlet hole, and this place, air inlet hole is provided with first one-way valve, and this one-way valve is the one-way valve that negative pressure is opened; The air flue that exhaust silencer is communicated with the air reserve chamber is provided with second one-way valve, and this one-way valve is the one-way valve that malleation is opened; The setting respectively of these two one-way valves, can guarantee in the up process crankcase of piston motion, to produce powerful negative pressure first one-way valve is inhaled moving opening, make outside fresh air be sucked air reserve chamber deposit in a large number, second one-way valve is closed, make the fresh air of deposit temporarily can not enter in the exhaust silencer, has only the powerful malleation that produces when the descending process of piston motion, just can be with first closed check valve, and make second one-way valve opens, the fresh air that deposit is sufficient in the air reserve chamber is pressed in the exhaust silencer.Apparatus of the present invention are because the powerful positive/negative pressure that can utilize the internal combustion engine motion to produce in crankcase, by being used to lay in the device deposit of air and the sufficient oxygen that participates in chemical reaction being provided, a large amount of sufficient oxygen enter in the exhaust silencer and HC, CO, NOx in the high-temp waste gas carry out sufficient chemical reaction, therefore can not re-use three-way catalyst, also can make HC, CO in the waste gas obtain abundant oxidation, NOx is fully reduced, and greatly reduces pollution from exhaust emission; The cost of administering pollution from exhaust emission be can reduce thus greatly, manufacturing industry and user's reduction of expenditure are.Certainly, also can three-way catalyst be set at exhaust silencer, to accelerate HC, the CO in the waste gas, the chemical reaction of NOx, even the inferior three-way catalyst of the three-way catalyst of Cai Yonging at this moment, also can satisfy high-level reduction exhaust emission needs, equally also can be manufacturing industry and user's reduction of expenditure.
The inventive method is simple, suitable, effective; Apparatus of the present invention are simple in structure, and the cost that is increased during manufacturing almost can be ignored.To promoting environmental protection, reducing manufacturing industry cost of production and customer using cost all has active operation significance.
The invention will be further described below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the another kind of embodiment of apparatus of the present invention.
In the accompanying drawing, 1 is crankcase, and 2 is exhaust silencer, and 3 for being used to lay in the device of air, and 4 is the air reserve chamber, and 5 is first one-way valve, and 6 is second one-way valve, and 7 is air flue, and 8 is three-way catalyst, and 9 is piston, and 10 is cylinder head, and 11 is outlet pipe, and 12 is internal-combustion engine.
Embodiment
Referring to Fig. 1, a kind of example structure schematic representation of the device of this reduction pollution from exhaust emission of internal combustion engine.The air outlet flue of the cylinder head 10 of internal-combustion engine 12 connects exhaust silencers 2 by outlet pipe 11, is provided for laying in the device 3 of air between the crankcase 1 of internal-combustion engine 12 and exhaust silencer 2.The described device 3 that is used to lay in air comprises air reserve chamber 4, and air reserve chamber 4 is provided with the air inlet hole, and this place, air inlet hole is provided with first one-way valve 5, and described first one-way valve 5 is the reed-type one-way valve of negative pressure unlatching.The crankcase 1 of internal-combustion engine, exhaust silencer 2 are communicated with the air reserve chamber 4 of the device that is used to lay in air respectively by air flue 7, the air flue 7 that exhaust silencer 2 is communicated with air reserve chamber 4 is provided with second one-way valve 6, and described second one-way valve is the reed-type one-way valve that malleation is opened.Produce powerful negative pressure in the up process crankcase 1 of internal combustion engine 9 motions first one-way valve 5 is inhaled moving opening, second one-way valve 6 is closed, and makes outside fresh air be sucked air reserve chamber 4 deposits in a large number; Producing powerful malleation in the descending process crankcase 1 of internal combustion engine 9 motions closes first one-way valve 5, second one-way valve 6 is opened, the air reserve chamber 4 interior sufficient oxygen of laying in that are used in the device of deposit air can be pressed in the exhaust silencer 2, in exhaust silencer 2, participate in the chemical reaction of HC, CO, NOx in the high-temp waste gas, reduce pollution from exhaust emission.It is good that first, second one-way valve of apparatus of the present invention adopts reed-type one-way valve effect, certainly also can adopt by spring controlled membrane type one-way valve, perhaps by spring controlled plunger type one-way valve, as long as can under malleation that piston motion produces or negative pressure, open.
Referring to Fig. 2, apparatus of the present invention not only are confined to the foregoing description, on the basis of the foregoing description, in the described exhaust silencer 2 three-way catalyst 8 can also be set in the usual way, to accelerate the chemical reaction of HC, CO, NOx in oxygen and the waste gas.
The method that the present invention reduces pollution from exhaust emission of internal combustion engine is the positive and negative alternative pressure that utilizes the piston motion of internal-combustion engine to produce in crankcase, the negative pressure that produces in the crankcase when up by piston motion (approximately-10kPa), fresh air is sucked a device deposit abundance that is used for laying in air, produce malleation (about 10kPa) in the crankcase by piston motion when descending, to be used for laying in the fresh air that the device of air lays in and deliver in the exhaust silencer of internal-combustion engine, make the HC in the high-temp waste gas that internal-combustion engine discharges, CO, NOx carries out giving off behind the sufficient chemical reaction with the oxygen of abundance again.Internal-combustion engine adopts the content of HC, CO, NOx in this method exhaust gas discharged greatly to be reduced, the HC+NOx discharge amount can be reduced to 3～5g/kWh, the CO discharge amount is reduced to 150～250g/kWh, thereby can satisfy the emission regulation demands of each developed country's strictness easily.
Claims (6)
1. method that reduces pollution from exhaust emission of internal combustion engine, it is characterized in that: the positive and negative alternative pressure that this method utilizes the piston motion of internal-combustion engine to produce in crankcase, the negative pressure that produces in the crankcase when up by piston motion, fresh air is sucked a device deposit abundance that is used for laying in air, produce malleation in the crankcase by piston motion when descending, to be used for laying in the fresh air that the device of air lays in and deliver in the exhaust silencer of internal-combustion engine, make the HC in the high-temp waste gas that internal-combustion engine discharges, CO, NOx carries out giving off behind the sufficient chemical reaction with the oxygen of abundance again.
2. device that reduces pollution from exhaust emission of internal combustion engine, it is characterized in that: the device that between the crankcase of internal-combustion engine and exhaust silencer, is provided for laying in air, the described device that is used to lay in air comprises the air reserve chamber, the air reserve chamber is provided with the air inlet hole, this place, air inlet hole is provided with first one-way valve, the crankcase of internal-combustion engine, exhaust silencer are communicated with the air reserve chamber of the device be used to lay in air respectively by air flue, the air flue that exhaust silencer is communicated with the air reserve chamber is provided with second one-way valve.
3. the device of reduction pollution from exhaust emission of internal combustion engine according to claim 2 is characterized in that: described first one-way valve is the one-way valve that negative pressure is opened.
4. the device of reduction pollution from exhaust emission of internal combustion engine according to claim 2 is characterized in that: described second one-way valve is the one-way valve that malleation is opened.
5. the device of reduction pollution from exhaust emission of internal combustion engine according to claim 2 is characterized in that: described first one-way valve, second one-way valve are the reed-type one-way valve.
6. the device of reduction pollution from exhaust emission of internal combustion engine according to claim 2 is characterized in that: in the described exhaust silencer three-way catalyst is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191165A CN101694175A (en) | 2009-10-20 | 2009-10-20 | Method and device for reducing pollution from exhaust emission of internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191165A CN101694175A (en) | 2009-10-20 | 2009-10-20 | Method and device for reducing pollution from exhaust emission of internal combustion engine |
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| CN101694175A true CN101694175A (en) | 2010-04-14 |
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| CN200910191165A Pending CN101694175A (en) | 2009-10-20 | 2009-10-20 | Method and device for reducing pollution from exhaust emission of internal combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477060A (en) * | 2021-12-01 | 2022-05-13 | 东风汽车集团股份有限公司 | New energy automobile coolant liquid filling auxiliary assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5902971A (en) * | 1997-01-31 | 1999-05-11 | Kioritz Corporation | Muffler for internal combustion engine |
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2009
- 2009-10-20 CN CN200910191165A patent/CN101694175A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5902971A (en) * | 1997-01-31 | 1999-05-11 | Kioritz Corporation | Muffler for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477060A (en) * | 2021-12-01 | 2022-05-13 | 东风汽车集团股份有限公司 | New energy automobile coolant liquid filling auxiliary assembly |
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Application publication date: 20100414 |