CN203476523U - Lean combustion repeated ignition device of internal combustion engine - Google Patents
Lean combustion repeated ignition device of internal combustion engine Download PDFInfo
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- CN203476523U CN203476523U CN201320555316.8U CN201320555316U CN203476523U CN 203476523 U CN203476523 U CN 203476523U CN 201320555316 U CN201320555316 U CN 201320555316U CN 203476523 U CN203476523 U CN 203476523U
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Abstract
A lean combustion repeated ignition device of an internal combustion engine comprises an air cylinder, an air regulator, a fuel regulator, an igniter and a controller, wherein the air regulator and the fuel regulator are respectively arranged on an intake valve of the air cylinder, the igniter is arranged on the air cylinder, and the controller located on the intake valve of the air cylinder is respectively and electrically connected with the air regulator, the fuel regulator and the igniter. The igniter is an ignition plug which can carry out ignition repeatedly in one stroke or an ignition plug set which can carry out ignition respectively in one stroke. The lean combustion repeated ignition device of the internal combustion engine solves the problem that one-time ignition combustion is insufficient in lean combustion, the fact that the internal combustion engine has a high air-fuel ratio can be ensured, fuel can be saved, the sufficient combustion of hydrocarbon and carbon monoxide in the lean combustion can also be ensured, and pollution to the environment can be reduced.
Description
Technical field
The utility model relates to technical field of internal combustion engines, particularly internal-combustion engine lean combustion igniting device repeatedly.
Background technique
The air fuel ratio of internal-combustion engine is that internal-combustion engine sucks the air of cylinder and the ratio of fuel (gas, wet goods) weight in aspirating stroke, that is to say, the air in mixed gas and the ratio of fuel oil are called air fuel ratio.When gasoline and air mixed combustion, air quantity is too much or very fewly all can not effectively burn, and causes waste and pollutes.The necessary AIR Proportional of gasoline perfect combustion, can calculate according to theory, and generally the chemically correct fuel for gasoline is 14.7, and the chemically correct fuel of bavin oil and gas is different.But in internal-combustion engine operated with lean mixture, be that air fuel ratio is greater than chemically correct fuel by the mixed gas with more thin, obviously along with the increase of air fuel ratio, IC engine oil consumption declines significantly, and along with the shared ratio of air increases, the adiabatic index of working medium moves closer to the adiabatic index in air, see theoretically, mixed gas is rarer, and adiabatic index is larger, and the thermal efficiency is also larger, when air fuel ratio reaches infinity, the thermal efficiency reaches maximum value.The restriction of the knock limit while not generally being subject to high load due to lean-burn internal combustion engine, can adopt higher compression ratios simultaneously, impels velocity of combustion to accelerate, and is conducive to the raising of the thermal efficiency.Therefore when air fuel ratio increases, oxygen is more sufficient in addition, and hydro carbons and carbon monoxide can fully burn, and pollutes littlely, does not make under its prerequisite of catching fire at internal-combustion engine, should carry out as far as possible lean combustion.
But along with air fuel ratio is increased to a certain degree, because the reduction of velocity of combustion may make incomplete combustion, the discharge of hydrocarbon (HC) can increase sharply.For the air-fuel ratio of lean-burn internal combustion engine, reach 25:1 when above, according to routine, cannot light, therefore conventionally must adopt and improve compression ratio, stratified mixture combustion and high-energy ignition technology.Employing to rare stratified combustion mode, is by motion formation around spark plug of air in cylinder, to be easy to the rich mixture of igniting by dense, and air-fuel ratio reaches 12:1 left and right, and skin is thin gradually.After rich mixture is lighted, burning involves rapidly skin.In order to improve the stability of burning, reduce nitrogen oxide (NOx), adopt now fuel oil injection timing and sectional ejecting technology, be about to oil spout and be divided into two stages, the oil spout of air inlet initial stage, first fuel oil enters bottom in cylinder and in cylinder, is uniformly distributed subsequently, the oil spout of air inlet later stage, rich mixture is gathered in spark plug surrounding at cylinder internal upper part and is lighted, realize stratified mixture combustion in order to improve the stability of burning, realize in addition high-energy ignition and be all conducive to fiery karyomorphism with broad gap spark plug and become, flame travel shortens, velocity of combustion speeds, and lean flammability limit is large.Although above measure and ensure the normal operation of internal-combustion engine when lean combustion, improve compression ratio, stratified mixture combustion and high-energy ignition and not only make Structure of Internal-Combustion Engine complicated, also caused NOx discharge to increase.
Vehicular internal combustion engine adopts Lean Burning Technique, can improve significantly the Economy of fuel oil and improve the emission performance of internal-combustion engine, but Lean Burning Technique is to be based upon on the basis of existing raising compression ratio, stratified mixture combustion and high-energy ignition.Raising compression ratio had both been subject to the restriction of the cylinder strength of materials, can not surpass the burning-point of fuel due to the temperature of working medium in cylinder simultaneously, so compression ratio can not be too large, the raising of compression ratio is limited.And stratified mixture combustion is to transplant from diesel engine the technology of coming, because sulphur content in the fuel such as gasoline, rock gas is high, need catalytic convention design to process the sulphur of high level in oil product, thereby cause higher NOx discharge, the cost of this technology on each car and the oil ratio of saving are got up and are not calculated, and small displacement engine is because volume of cylinder is little, and the difficulty of stratified mixture combustion is larger, effect is more undesirable, makes stratified combustion can only be confined to the internal-combustion engine of larger cylinder diameter.And increased the discharge of NOx, this technology has not only caused complex structure, and on internal-combustion engine application particularly on the internal-combustion engine of small displacement effect unsatisfactory.High-energy ignition technology not only causes the waste of energy, the life-span of also having reduced ignition system simultaneously.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide repeatedly igniting device of internal-combustion engine lean combustion, an inadequate problem of ignition while having solved lean combustion, can either guarantee that internal-combustion engine has higher air fuel ratio, saved fuel, can guarantee again in lean combustion that hydro carbons and carbon monoxide fully burn, and have reduced the pollution to environment.
In order to achieve the above object, the technological scheme that the utility model is taked is:
Internal-combustion engine lean combustion is igniting device repeatedly, comprises cylinder 1, air regulator 2 and fuel regulator 3, also comprises igniter 4 and controller 5; Described air regulator 2 is for controlling the air regulator of the air quantity that enters cylinder 1, described fuel regulator 3 is for controlling the fuel regulator of the amount of fuel that enters cylinder 1, and described air regulator 2 and fuel regulator 3 are arranged on respectively the intake valve 6 of cylinder 1; Described igniter 4 is that described igniter 4 is arranged in cylinder 1 for realizing the repeatedly igniter of ignition of mixed gas; The described controller 5 that is positioned at intake valve 6 places of cylinder 1 is electrically connected to air regulator 2, fuel regulator 3 and igniter 4 respectively; Described igniter 4 is the spark plug that can repeatedly light a fire in a stroke, or the spark plug group of lighting a fire respectively in a stroke.
Described internal-combustion engine lean combustion repeatedly igniting device comprises at least one cylinder 1.
Described internal-combustion engine lean combustion repeatedly each cylinder 1 of igniting device igniting number of times in a stroke is more than or equal to 2.
Described igniter 4 comprises for the spark plug in the igniting of stroke uniform pulse, or the spark plug group for lighting a fire successively according to the pulsewidth of setting and ignition gap being comprised of a plurality of spark plugs.
The ignition gap of described igniter 4 is 3-30 millisecond, and igniting pulsewidth is 1-20 millisecond.
Working principle of the present utility model is:
The utility model according to predefined igniting pulsewidth a, light gap b and igniting frequency n, at expansion stroke of internal-combustion engine, along with the compression movement that piston 8 makes progress, the spark plug in igniter 4 repeatedly light a fire or the spark plug group of igniter 4 in spark plug light a fire successively.Igniting pulsewidth a, the ignition gap b of actual set and igniting frequency n can be adjusted according to Structure of Internal-Combustion Engine, fuel band, actual load, road surface situation in good time.
The beneficial effects of the utility model are:
The utility model design is when solving ignition internal combustion engine lean combustion, and the key technology of reliable efficient igniting adopts the design can make the lean combustion of internal-combustion engine more abundant, and the thermal efficiency improves.The utility model is set igniting pulsewidth a, ignition gap b and igniting frequency n, in front once igniting, again light a fire while reaching optimum efficiency, relight n time, has guaranteed that internal-combustion engine lean combustion in the situation that internal structure is constant is abundant, fuel-efficient and has reduced the discharge amount of NOx.The utility model designs actual igniting pulsewidth a, ignition gap b and igniting frequency n, can adjust according to actual conditions in good time, fundamentally eliminated internal-combustion engine under lean combustion state fuel oil or fuel gas buring insufficient, high, the with serious pollution performance deficiency of fuel consumption, and can use in the ignition internal combustion engine field of various motor vehicle boats and ships, internal-combustion engine machine equipment etc.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the repeatedly schematic diagram of ignition gap b and igniting pulsewidth a of single-cylinder engine of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Referring to Fig. 1, the utility model is repeatedly igniting device of internal-combustion engine lean combustion, comprises cylinder 1, air regulator 2 and fuel regulator 3, also comprises igniter 4 and controller 5; Described air regulator 2 is for controlling the air regulator of the air quantity that enters cylinder 1, described fuel regulator 3 is for controlling the fuel regulator of the amount of fuel that enters cylinder 1, and described air regulator 2 and fuel regulator 3 are arranged on respectively the intake valve 6 of cylinder 1; Described igniter 4 is that described igniter 4 is arranged in cylinder 1 for realizing the repeatedly igniter of ignition of mixed gas; The described controller 5 that is positioned at intake valve 6 places of cylinder 1 is electrically connected to air regulator 2, fuel regulator 3 and igniter 4 respectively; Described igniter 4 is the spark plug that can repeatedly light a fire in a stroke, or the spark plug group of lighting a fire respectively in a stroke.
Described internal-combustion engine lean combustion repeatedly igniting device comprises at least one cylinder 1.
Described internal-combustion engine lean combustion repeatedly each cylinder 1 of igniting device igniting number of times in a stroke is more than or equal to 2.
Described igniter 4 comprises for the spark plug in the igniting of stroke uniform pulse, or the spark plug group for lighting a fire successively according to the pulsewidth of setting and ignition gap being comprised of a plurality of spark plugs.
The ignition gap of described igniter 4 is 3-30 millisecond, and igniting pulsewidth is 1-20 millisecond.
Referring to Fig. 2, in Fig. 2, a is igniting pulsewidth, and b is ignition gap, and n is igniting number of times.Transverse axis is the time, and unit is millisecond (ms), and the longitudinal axis is breakdown voltage, and unit is kilovolt (KV).When spark plug is lighted a fire first, igniting pulsewidth is a, when igniting later time arrives after ignition gap b, and spark plug refire time, after the ignition gap b of second, spark plug is lighted a fire again, and igniting pulsewidth is a.The like, as required, its igniting number of times can arrive n time, until cylinder fuel is fully burnt.
The utility model designs actual igniting pulsewidth a, ignition gap b and igniting frequency n, can adjust according to actual conditions in good time, and internal-combustion engine fuel oil under lean combustion state is fully burnt.Fuel oil described in the utility model comprises gasoline, rock gas etc.Described internal-combustion engine lean combustion repeatedly igniting device is not only applicable to single-cylinder engine and is applicable to multi-cylinder engine yet, can be applied in the ignition internal combustion engine field of various motor vehicle boats and ships, internal-combustion engine machine equipment etc.
Internal-combustion engine completes altogether four strokes in an operation cycle, is respectively suction stroke, compression stroke, expansion stroke and exhaust stroke.In suction stroke, intake valve 6 is opened, and exhaust valve 7 cuts out, and piston 8 moves downward, and gas-air mixture enters cylinder 1.In compression stroke, intake valve 6 and exhaust valve 7 are all closed, and piston 8 moves upward, and the mixed gas of gasoline and air is compressed.Mechanical energy is changed into interior energy.When in expansion stroke, compression stroke finishes, spark plug produces electrical spark, and mixed gas is fiercely burnt, and produces the gas of High Temperature High Pressure.High temperature and high pressure gas promotes piston 8 and moves downward, and band dynamic crankshaft rotates, externally acting.In four strokes, only have expansion stroke externally to do work, other three strokes are all to lean on the inertia of expansion stroke to complete.Interior, can change into mechanical energy.In exhaust stroke, intake valve 6 is closed, and exhaust valve 7 is opened, and piston 8 moves upward, and waste gas is discharged to cylinder 1.
Embodiment one
Internal-combustion engine completes in four stroke working procedure in an operation cycle, the piston 8 that is arranged in cylinder of internal-combustion engine 1 relies on the inertia of upper operation cycle acting generation to move downward, controller 5 is controlled respectively air regulator 2 and the fuel regulator 3 that is positioned at intake valve 6, adjusting enters air quantity and the amount of fuel of cylinder 1, in cylinder 1, air and fuel oil mix, and become mixed gas.After moving to extreme lower position, piston 8 rely on again inertia to move upward.Controller 5 comprises sensor, actual compression ratio and air fuel ratio in the cylinder 1 of sensor senses, and when air fuel ratio reaches the ignition theory air fuel ratio of setting in controller 5, controller 5 control point firearms 4 start igniting.Along with the continuation campaign of piston 8, the igniting pulsewidth a that igniter 4 has set according to controller 5, light gap b and igniting frequency n light a fire, until the mixture combustion in cylinder 1 is complete.After burning, produce kinetic energy promotion piston 8 and move downward, the next operation cycle of drive internal-combustion engine is task again.Piston 8 relies on inertia to drive and moves upward while again moving downward to minimum point, produce waste gas and by exhaust valve 7, discharging at this moment during burning.
In the process of controller 5 control point firearms 4, actual compression ratio and air fuel ratio in the cylinder 1 of sensor senses, when air fuel ratio reaches the ignition theory air fuel ratio of setting in controller 5, controller 5 produces a uniform pulse fire signal, sends to igniter 4.The igniting pulsewidth a of signal, light gap b and igniting frequency n according to Structure of Internal-Combustion Engine, fuel band, actual load, road surface situation, set.Spark plug in igniter 4 starts uniform pulse formula according to uniform pulse fire signal repeatedly lights a fire, until the mixture combustion in cylinder 1 is complete.Whole igniting process occurs in a stroke, i.e. expansion stroke.Ignition gap b is relevant with power and the duration of charge of plug coils, and generally, ignition gap b is 3-30 millisecond; A is relevant with the velocity of discharge for igniting pulsewidth, and generally, igniting pulsewidth a is 1-20 millisecond.
Embodiment two
Internal-combustion engine completes four stroke working procedure in an operation cycle, with embodiment one.
In the process of controller 5 control point firearms 4, actual compression ratio and air fuel ratio in the cylinder 1 of sensor senses, when air fuel ratio reaches the ignition theory air fuel ratio of setting in controller 5, controller 5 produces a uniform pulse fire signal, sends to igniter 4.The igniting pulsewidth a of signal, light gap b and igniting frequency n according to Structure of Internal-Combustion Engine, fuel band, actual load, road surface situation, set.In igniter 4, be provided with the spark plug group that comprises a plurality of spark plugs, spark plug in spark plug group simultaneously or according to uniform pulse fire signal, start uniform pulse formula successively and repeatedly light a fire, until the mixture combustion in cylinder 1 is complete.When in spark plug group, the number of spark plug is more than or equal to igniting frequency n, spark plug is lighted a fire successively to completing n igniting.When in spark plug group, the number of spark plug is less than igniting frequency n, after spark plug is lighted a fire successively, circulation is igniting again, until the mixture combustion completing in n igniting and cylinder 1 is complete.Whole igniting process occurs in a stroke, i.e. expansion stroke.Ignition gap b is relevant with power and the duration of charge of plug coils, and generally, ignition gap b is 3-30 millisecond; A is relevant with the velocity of discharge for igniting pulsewidth, and generally, igniting pulsewidth a is 1-20 millisecond.
Embodiment three
The uniform pulse fire signal igniting that igniter 4 also can not produce according to controller 5.
Internal-combustion engine completes in four stroke working procedure in an operation cycle, the piston 8 that is arranged in cylinder of internal-combustion engine 1 relies on the inertia of upper operation cycle acting generation to move downward, controller 5 is controlled respectively air regulator 2 and the fuel regulator 3 that is positioned at intake valve 6, adjusting enters air quantity and the amount of fuel of cylinder 1, in cylinder 1, air and fuel oil mix, and become mixed gas.After moving to extreme lower position, piston 8 rely on again inertia to move upward.Controller 5 comprises sensor, actual compression ratio and air fuel ratio in the cylinder 1 of sensor senses, and when air fuel ratio reaches the ignition theory air fuel ratio of setting in controller 5, controller 5 control point firearms 4 start igniting.Along with piston 8 continues motion, controller 5 sends ignition control signal again to igniter 4, and the igniting of control point firearm 4, until the mixture combustion in cylinder 1 is complete.Whole igniting process occurs in a stroke, i.e. expansion stroke.
Embodiment four
Internal-combustion engine lean combustion described in the utility model repeatedly igniting device is not only applicable to single-cylinder engine and is applicable to multi-cylinder engine yet.For multi-cylinder engine, the working principle in its each cylinder 1 is identical with single-cylinder engine with method.
The above; it is only embodiment of the present utility model; but the utility model does not limit to above-mentioned cited embodiment; any those skilled in the art of being familiar with are according to the utility model working principle and the above-mentioned embodiment providing; the various modifications that are equal to of making, the replacement being equal to, parts increase and decrease and reconfigure, thereby within the new mode of execution forming all should be encompassed in protection domain of the present utility model.
Claims (5)
1. internal-combustion engine lean combustion igniting device repeatedly, comprises cylinder (1), air regulator (2) and fuel regulator (3), it is characterized in that: also comprise igniter (4) and controller (5); Described air regulator (2) is for entering the air regulator of the air quantity of cylinder (1) for control, described fuel regulator (3) is for entering the fuel regulator of the amount of fuel of cylinder (1) for control, described air regulator (2) and fuel regulator (3) are arranged on respectively the intake valve (6) of cylinder (1); Described igniter (4) is that described igniter (4) is arranged in cylinder (1) for realizing the repeatedly igniter of ignition of mixed gas; The described controller (5) that is positioned at intake valve 6 places of cylinder (1) is electrically connected to air regulator (2), fuel regulator (3) and igniter (4) respectively; Described igniter (4) is the spark plug that can repeatedly light a fire in a stroke, or the spark plug group of lighting a fire respectively in a stroke.
2. internal-combustion engine lean combustion according to claim 1 igniting device repeatedly, is characterized in that: comprise at least one cylinder (1).
3. internal-combustion engine lean combustion according to claim 1 and 2 igniting device repeatedly, is characterized in that: the igniting number of times of each cylinder (1) in a stroke is more than or equal to 2.
4. internal-combustion engine lean combustion according to claim 1 igniting device repeatedly, it is characterized in that: described igniter (4) comprises for the spark plug in the igniting of stroke uniform pulse, or the spark plug group for lighting a fire successively according to the pulsewidth of setting and ignition gap being formed by a plurality of spark plugs.
5. according to the igniting device repeatedly of the internal-combustion engine lean combustion described in claim 1 or 4, it is characterized in that: the ignition gap of described igniter (4) is 3-30 millisecond, igniting pulsewidth is 1-20 millisecond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320555316.8U CN203476523U (en) | 2013-09-06 | 2013-09-06 | Lean combustion repeated ignition device of internal combustion engine |
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| CN201320555316.8U CN203476523U (en) | 2013-09-06 | 2013-09-06 | Lean combustion repeated ignition device of internal combustion engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706745A (en) * | 2017-10-26 | 2018-02-16 | 重庆长安汽车股份有限公司 | Spark plug fouling self cleaning method |
| CN109026287A (en) * | 2017-06-08 | 2018-12-18 | 大众汽车有限公司 | Regeneration method and internal combustion engine for the particulate filter in the exhaust apparatus of internal combustion engine |
| CN115045752A (en) * | 2022-06-30 | 2022-09-13 | 东风柳州汽车有限公司 | Engine combustion system |
-
2013
- 2013-09-06 CN CN201320555316.8U patent/CN203476523U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026287A (en) * | 2017-06-08 | 2018-12-18 | 大众汽车有限公司 | Regeneration method and internal combustion engine for the particulate filter in the exhaust apparatus of internal combustion engine |
| CN107706745A (en) * | 2017-10-26 | 2018-02-16 | 重庆长安汽车股份有限公司 | Spark plug fouling self cleaning method |
| CN115045752A (en) * | 2022-06-30 | 2022-09-13 | 东风柳州汽车有限公司 | Engine combustion system |
| CN115045752B (en) * | 2022-06-30 | 2023-06-20 | 东风柳州汽车有限公司 | Combustion system of engine |
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