CN101984244A - Communicated composite inlet channel system for four-valve diesel engine - Google Patents

Communicated composite inlet channel system for four-valve diesel engine Download PDF

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Publication number
CN101984244A
CN101984244A CN 201010538861 CN201010538861A CN101984244A CN 101984244 A CN101984244 A CN 101984244A CN 201010538861 CN201010538861 CN 201010538861 CN 201010538861 A CN201010538861 A CN 201010538861A CN 101984244 A CN101984244 A CN 101984244A
Authority
CN
China
Prior art keywords
inlet channel
diesel engine
communicated
inlet duct
gases
Prior art date
Application number
CN 201010538861
Other languages
Chinese (zh)
Inventor
李金武
贺兆欣
曹晓峰
陶海峰
Original Assignee
东风朝阳柴油机有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 东风朝阳柴油机有限责任公司 filed Critical 东风朝阳柴油机有限责任公司
Priority to CN 201010538861 priority Critical patent/CN101984244A/en
Publication of CN101984244A publication Critical patent/CN101984244A/en

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Abstract

The invention discloses a communicated composite inlet channel system for a four-valve diesel engine. A communicated gas inlet is arranged on the wall between a tangential inlet channel and a helical inlet channel and is used for communicating gases in the two inlet channels. Before two gases enter a cylinder, the gases are mixed, the tangential gas and the helical gas are interlaced and mixed mutually, and the gases are further mixed after the gases enter the cylinder; and because the gases are successively mixed twice, more partial turbulent flows are formed, thereby effectively improving the generating conditions of an oil and gas mixture and achieving good oil and gas mixing effect. Because the combustion is further sufficient, the economical efficiency and the dynamic property of the diesel engine are effectively improved, the generation of NOx and particulate matters is reduced, and the exhaust emission index is greatly improved. Compared with a separated inlet channel, the communicated composite inlet channel has very small casting process change and is suitable for batch production. The invention is also suitable for the inlet channel of a two-valve diesel engine.

Description

Four-valve diesel engine communication type composite air intake road system

Technical field

The invention belongs to internal-combustion engine technology, be specifically related to a kind of art designs of four-valve diesel engine intake duct.

Background technique

Intake duct is the important structure on the motor, and the design of good intake duct is for the crucial especially technology of cylinder cap overhead type diesel engine.Along with the improving constantly of diesel technology, four-valve diesel engine is popularized, and has obtained good market effect in recent years.Each cylinder of four-valve diesel engine has two intake ducts, general pattern is tangential inlet duct and spiral inlet duct, independently of one another, the tangential admission that produced stream and spirally inlet air flow point do not enter cylinder through separately air flue, two strands of airflow collisions interweave in cylinder, form turbulent flow, mix with diesel oil simultaneously, guarantee the exhaust emissions of acting of diesel engine normal combustion and cleaning.Therefore, intake duct also is one of key technology of diesel combustion efficient.

Before address, at present two intake ducts of four-valve diesel engine are independently of one another, tangentially do not disturb mutually with spirally inlet air, two strands of air-flows could mix and mixing for once after entering cylinder.Hysteresis time difference during mixing and only air-flow mix, and have shortened the incorporation time and the process of tangential gas flow and spiral air flow to a certain extent, so have influence on mixed admission again with the oil gas mixed effect of diesel oil.This fuel economy to diesel engine, power character, smoke intensity and exhaust emissions all can exert an influence, particularly international and domestic increasingly stringent for the automotive emission standard, reducing exhaust emissions has become the primary goal of diesel engine industry research and development, is that the institute of target of the present invention asks and improve the intake duct design deficiency.

Summary of the invention

The objective of the invention is,, spirally inlet air tangential at present four valve separated type intake ducts flows mixed once, incorporation time hysteresis, influences the present situation of oil gas mixed effect, a kind of four-valve diesel engine communication type composite air intake road system is proposed, to improve above-mentioned defective.

Below in conjunction with accompanying drawing know-why of the present invention and structure are described.Four-valve diesel engine communication type composite air intake road system mainly comprises tangential inlet duct, spiral inlet duct and cylinder (as Fig. 1).The separated type intake duct (as Fig. 2) that present stage extensively adopts, promptly two intake ducts are independently of one another, and tangential admission and spirally inlet air do not disturb mutually, and two strands of air-flows could mix after entering cylinder, and for once mix.Key of the present invention is to be provided with to be communicated with suction port on the partition between tangential inlet duct and the spiral inlet duct, makes the airflow connection in two intake ducts of tangential inlet duct and spiral inlet duct.By the comparison of Fig. 1 and Fig. 2, communication type composite air intake channel ratio separated type intake duct has airflow pattern in the more cylinder as can be seen.Be that streamlined connection suction port makes that two kinds of air-flows have just begun to mix before entering cylinder, the mixing that is interlaced with one another of tangential gas flow, spiral air flow, proceed secondary deeply mixing after entering cylinder, twice mixing forms turbulent flow, effectively improved the formation condition that oil gas mixes, made that burning is more abundant.

The beneficial effect of characteristics of the present invention and generation is,Compare with the separated type intake duct, communication type composite air intake road casting technique changes very little, is fit to produce in batches.Four-valve diesel engine communication type composite air intake road system, characteristics are that two kinds of air-flows have just begun to mix before entering cylinder, continue deeply to mix after entering cylinder, twice totally mixing successively, form more local turbulent flow, effectively improve the formation condition that oil gas mixes, reached good oil gas mixed effect.Because burning is more abundant, so effectively improved Economy, the power character of diesel engine and reduced NOx and the generation of particulate matter, the exhaust emissions index is greatly improved.

Description of drawings

Fig. 1 is the principle of the invention and structural representation, and figure intermediate cam shape arrow is represented the airflow pattern and the flow direction.

Fig. 2 is a separated type intake duct structural representation.

Embodiment

Below in conjunction with accompanying drawing and by embodiment structural principle of the present invention is described further.Four-valve diesel engine communication type composite air intake road system mainly comprises tangential inlet duct 1, spiral inlet duct 2 and cylinder 3.On the partition between tangential inlet duct 1 and the spiral inlet duct 2, be provided with and be communicated with suction port 4, make the airflow connection in tangential inlet duct 1 and 2 two intake ducts of spiral inlet duct.The entrance section of tangential inlet duct 1 and spiral inlet duct 2 is long-pending to be equated.The design that is communicated with inlet structure is applicable to two valve diesel intake ducts too.

The long-pending equal 1496mm that is of the tangential inlet duct 1 of present embodiment and the entrance section of spiral inlet duct 2 2, connecting port 4 casts out simultaneously on the partition between two air flues, sectional area 498 mm 2, the edge is streamlined, adapts to air motion.In the air inlet starting stage, move in tangential gas flow, spiral air flow edge air flue separately, when arriving communication port 4, tangential gas flow, spiral air flow each some branch to carries out mixing first time in the other side's air flue, bring tangential kinetic energy, spiral kinetic energy into the other side air flue simultaneously, interaction effect forms more local turbulent flow.After entering cylinder, two strands of air-flows continue mutual collision, mix for the second time, and turbulent flow will peak, and have created optimum condition for diesel oil and Air mixing, burn then, by air outlet flue 5 discharge waste gas after burning.

Claims (3)

1. four-valve diesel engine communication type composite air intake road system, comprise tangential inlet duct (1), spiral inlet duct (2) and cylinder (3), it is characterized in that on the partition between tangential inlet duct (1) and the spiral inlet duct (2), being provided with and be communicated with suction port (4), make the airflow connection in tangential inlet duct (1) and (2) two intake ducts of spiral inlet duct.
2. according to the described four-valve diesel engine communication type of claim 1 composite air intake road system, the entrance section of described tangential inlet duct (1) and spiral inlet duct (2) is long-pending to be equated.
3. according to claim 1 or 2 described four-valve diesel engine communication type composite air intake road systems, it is characterized in that the described suction port (4) that is communicated with that partition is provided with between described tangential inlet duct (1) and the spiral inlet duct (2), also be applicable to two valve diesel intake ducts.
CN 201010538861 2010-11-11 2010-11-11 Communicated composite inlet channel system for four-valve diesel engine CN101984244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010538861 CN101984244A (en) 2010-11-11 2010-11-11 Communicated composite inlet channel system for four-valve diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010538861 CN101984244A (en) 2010-11-11 2010-11-11 Communicated composite inlet channel system for four-valve diesel engine

Publications (1)

Publication Number Publication Date
CN101984244A true CN101984244A (en) 2011-03-09

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CN 201010538861 CN101984244A (en) 2010-11-11 2010-11-11 Communicated composite inlet channel system for four-valve diesel engine

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736170A (en) * 2016-03-28 2016-07-06 奇瑞汽车股份有限公司 Aviation diesel engine piston combustion chamber and combustion system
CN107035579A (en) * 2017-04-14 2017-08-11 无锡开普机械有限公司 Oil to gas gas engine inlet structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256062A (en) * 1978-01-27 1981-03-17 Volkswagenwerk Aktiengesellschaft Internal combustion diesel engine
JPS61286528A (en) * 1985-06-13 1986-12-17 Toyota Motor Corp Siamese type intake port device of internal-combustion engine
US4744342A (en) * 1986-01-08 1988-05-17 Fuji Jukogyo Kabushiki Kaisha Intake port structure for an internal combustion engine
US4854291A (en) * 1986-11-07 1989-08-08 Elsbett L Cylinder head for use in diesel engines
CN201865812U (en) * 2010-11-11 2011-06-15 东风朝阳柴油机有限责任公司 Communicated and combined inlet channel device of four-valve diesel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256062A (en) * 1978-01-27 1981-03-17 Volkswagenwerk Aktiengesellschaft Internal combustion diesel engine
JPS61286528A (en) * 1985-06-13 1986-12-17 Toyota Motor Corp Siamese type intake port device of internal-combustion engine
US4744342A (en) * 1986-01-08 1988-05-17 Fuji Jukogyo Kabushiki Kaisha Intake port structure for an internal combustion engine
US4854291A (en) * 1986-11-07 1989-08-08 Elsbett L Cylinder head for use in diesel engines
CN201865812U (en) * 2010-11-11 2011-06-15 东风朝阳柴油机有限责任公司 Communicated and combined inlet channel device of four-valve diesel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736170A (en) * 2016-03-28 2016-07-06 奇瑞汽车股份有限公司 Aviation diesel engine piston combustion chamber and combustion system
CN107035579A (en) * 2017-04-14 2017-08-11 无锡开普机械有限公司 Oil to gas gas engine inlet structure

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Application publication date: 20110309

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