CN101949329B - Oil limiter having function of correcting oil mass for single cylinder diesel and manufacturing method thereof - Google Patents
Oil limiter having function of correcting oil mass for single cylinder diesel and manufacturing method thereof Download PDFInfo
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- CN101949329B CN101949329B CN 201010521350 CN201010521350A CN101949329B CN 101949329 B CN101949329 B CN 101949329B CN 201010521350 CN201010521350 CN 201010521350 CN 201010521350 A CN201010521350 A CN 201010521350A CN 101949329 B CN101949329 B CN 101949329B
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Abstract
The invention discloses an oil limiter having a function of correcting oil mass for a single cylinder diesel and a manufacturing method thereof. When manufacturing, the following factors of the oil limiter are confirmed: the value three characteristic parameters and manufacturing bias, an oil mass correcting route confirmed according to the torque reserve property requirement of the speed characteristics of the diesel, a cranking enrichment route meeting the cold starting performance and a starting spring pre-tightening force value for preventing the oil limiter misacting with the speed characteristics of the diesel. The oil limiter comprises a correcting rod (1), a corrector body (2), a correcting spring base (3), a starting spring (4), a correcting nut (5) and a correcting spring (6). Through using the oil limiter of the invention, the full load of the diesel can meet the demand of torque reserve, the black smoke which is caused by continuously increased oil mass can be prevented, and the oil limiter meets the national standard of torque reserve of the mobile diesel, the checking demand of revolving speed adaptability coefficient and discharging and smoke intensity demands. Whenstarting, the oil limiter meets the cranking enrichment demand and the diesel can be started easily.
Description
Technical field
Patent of the present invention relates to the oil-limiter technology that single cylinder diesel is proofreaied and correct with the band oil mass, is used for diesel engine and satisfies the performance requirement that moves with diesel engine.
Background technique
Single cylinder diesel moves the oil-limiter that needs the correction of mounting strap oil mass with the performance requirement of diesel engine for satisfying; And the parameter of making needs correct; Otherwise diesel engine possibly not reach the power character requirement that NBS requires, and diesel engine over-emitting black exhaust or the discharging requirement that exceeds standard perhaps occurs.The 186F serial diesel engine nearly 2,000,000 like domestic annual output, the generator set of former main matched and fixed purposes, water pump assembly etc. are main with outlet.The original oil-limiter of diesel engine; Be actually a speed stabilization machine, diesel engine plays when being higher than rated engine speed sudden change load operation and reduces hypervelocity amount, the effect of diesel engine improved stability; Because oil-limiter starting oil mass stroke is bigger, so declared working condition can not play the effect of limit oil.Home sale uses the supporting machinery supports that are mainly used in rotary cultivator, tractor, the mobile purposes of small engineering machinery work of diesel engine such as 186F at present, and former oil-limiter can not play the nominal power restriction, and load increases in the actual use of diesel injection pump oil mass speed governing shift fork; The oil mass shift fork moves by governor control characteristics under the effect of governor spring power; When reaching full load, moment of torsion can continue to increase overburdening and continue by the governor control characteristics operation, and fuel delivery increases makes the diesel engine over-emitting black exhaust; Increasing too much until fuel delivery, the back black smoke billows and stops working; Diesel engine can not satisfy NBS to moving the diesel engine examination requirement of purposes, therefore for preventing that overload operation from causing that the diesel engine smoke intensity is big, oil consumption is high, problem of environment pollution caused; The oil-limiter that single cylinder diesel answers the mounting strap oil mass to proofread and correct; The fuel delivery of declared working condition is limited in the nominal power position, and the performance of diesel engine satisfies NBS to the diesel engine torque reserve that moves purposes and the examination requirement of speed adaptive coefficient, the starting upgraded start request that satisfies is arranged; Therefore need the oil mass limiter of design band torque correction and starting upgraded correction, be called for short oil-limiter.
Summary of the invention
Can not play the nominal power restriction for solving former oil-limiter; Load increases in the actual use of diesel injection pump oil mass speed governing shift fork; By the governor control characteristics operation, when reaching full load, moment of torsion can continue to increase overburdening and continue to move by governor control characteristics the oil mass shift fork under the effect of governor spring power; Fuel delivery increases makes the diesel engine over-emitting black exhaust, the invention provides a kind of starting upgraded oil-limiter and production method of oil mass correction that have.
Oil-limiter of the present invention is made up of adjustable stem, correction body, correcting spring seat, primer spring, correction nut and correcting spring.Wherein adjustable stem, correcting spring are assemblied in the correcting spring seat, and the correcting spring seat is assemblied in the positive spring seat of corrector sports school, and the gap of adjustable stem right-hand member and correcting spring seat bottom is the oil mass correction stroke Δ X that torque correction is used; What lay between correcting spring seat and the correction body is primer spring correcting spring seat, and the correcting spring seat is the required oil mass correction stroke Δ Y of starting with the gap of proofreading and correct nut; One end in contact of adjustable stem front end and governor lever, governor lever are stirred Injection Pump oil mass shift fork and are changed fuel delivery.
Working principle of the present invention and production method are following:
Confirm the value and the manufacture deviation of three characteristic parameters of oil-limiter, the oil mass correction stroke of confirming by the torque reserve performance requirement of diesel speed characteristic, satisfy the starting upgraded stroke of cold-start performance and prevent that oil-limiter is in the acting primer spring pretightening force value of diesel speed characteristic low speed mistake.
Confirm single cylinder diesel oil-limiter correction stroke Δ X; Required oil mass of the performance of this single cylinder diesel maximum torque point and Injection Pump speed characteristics confirm in the difference of the actual measurement oil mass of maximum torque point, and the starting upgraded oil mass of starting upgraded stroke is definite by the difference that this kind single cylinder diesel starts required oil mass and the Injection Pump speed characteristics actual measurement oil mass when the starting speed; Diesel engine full-load speed characteristic when at first confirming single cylinder diesel rigidity limit oil; Draw moment of torsion, power, fuel consumption rate and can draw the Injection Pump speed characteristics; The fuel consumption rate value of maximum torque, speed at maximum torque value and the corresponding rotating speed that requires according to diesel engine then draws required circulating fuel injection quantity of Maximum Torque operating point and correction oil mass Δ
V b, by proofreading and correct oil mass
Δ V bDetermine and make the correction stroke Δ X that oil-limiter is used.
The starting upgraded stroke Δ of oil-limiter Y is confirmed by starting upgraded oil mass; The diesel engine starting oil mass is generally 1.3～1.5 times of declared working condition point fuel injection quantity; Required actual cycle fuel feeding value when drawing diesel engine starting in view of the above; The difference of fuel delivery is the required correction enriching oil mass of starting during the starting speed of the Injection Pump speed characteristics of this value and rigidity limit oil, plays normal moveout correction enriching oil mass according to this and draws the increment of Injection Pump effective delivery stroke, thereby draw the starting upgraded stroke Δ of oil-limiter Y.
The primer spring pretightening force confirms, the active force of the primer spring pretightening force size of oil-limiter suffered speed control system on should the adjustable stem greater than oil-limiter when the diesel speed characteristic minimum operating speed.
Use oil-limiter to have following beneficial effect: can guarantee that diesel engine starting is easy, satisfy the mobile purposes diesel engine examination of country and require (torque reserve is greater than 12%), the actual working condition of using minimizing diesel engine over-emitting black exhaust; Diesel engine smoke intensity mandatory requirement is not more than 4.5FSU, does not use oil-limiter, and diesel engine can billow by black smoke; Smoke intensity can reach 7～10FSU; Cause incomplete combustion,, the effect of environmental protection and energy saving is arranged so use oil-limiter also to save fuel oil.
Description of drawings
The oil-limiter that Fig. 1 proofreaies and correct with the band oil mass for single cylinder diesel.
Fig. 2 is the single cylinder diesel speed characteristics of dress rigidity oil-limiter.
Fig. 3 is the Injection Pump speed characteristics and proofreaies and correct oil mass, starting upgraded quantitative analysis.
Fig. 4 is a 186FA diesel speed characteristic.
Among the figure, body, (3) correcting spring seat, (4) primer spring, (5) correction nut and (6) correcting spring are proofreaied and correct in (1) adjustable stem, (2).
Embodiment
Fig. 1 is that single cylinder diesel is with the oil-limiter structure that has oil mass to proofread and correct.
The present invention is made up of adjustable stem 1, correction body 2, correcting spring seat 3, primer spring 4, correction nut 5 and correcting spring 6.Said adjustable stem 1, correcting spring 4 are assemblied in the correcting spring seat 3; The gap of adjustable stem 1 right-hand member and correcting spring seat 3 bottoms is that the oil mass correction stroke Δ X that torque correction uses is 0.13-0.17mm; What lay between correcting spring seat 3 and the correction body 2 is primer spring; Correcting spring seat 3 is that starting upgraded correction stroke Δ Y is 0.85-0.93mm with the gap of proofreading and correct nut 5, can guarantee diesel engine starting and over-emitting black exhaust not easily.One end in contact of adjustable stem front end and governor lever, governor lever are stirred Injection Pump oil mass shift fork and are changed fuel delivery.The active force of diesel engine starting initial tension of spring during greater than the minimum speed of adjustable stem on the diesel speed characteristic; Primer spring was inoperative when its characteristic can make diesel engine on speed characteristics, work; Prevent the diesel engine over-emitting black exhaust; Effectively the smoke intensity of control diesel engine reduces the use oil consumption of diesel engine.
Be example with 186FA diesel engine oil-limiter below, definite method of oil-limiter Fabrication parameter.
Oil-limiter correction stroke Δ X, required oil mass correction stroke Δ Y and three parameters of primer spring pretightening force of starting are keys that oil-limiter is made, and numerical values recited and diesel engine Maximum Torque, diesel engine smoke intensity and discharging have direct relation.
Oil-limiter correction stroke Δ X confirms that by the oil mass that diesel engine need be proofreaied and correct the correction oil mass of diesel engine comprises two-part, and a part depends on the combination of the structural parameter of use for diesel engine Injection Pump, and parameter combinations has determined the oil mass value under each rotating speed of Injection Pump speed characteristics; Another part depends on diesel engine be up to state standards the torque reserve value and the tachometer value requirement of regulation, i.e. the diesel speed characteristic actual performance that will reach, the numerical value of torque value and fuel consumption rate.Confirm single cylinder diesel oil-limiter correction stroke Δ X; Diesel engine full-load speed characteristic in the time of at first need knowing single cylinder diesel rigidity limit oil; As shown in Figure 2; Draw moment of torsion, power, fuel consumption rate according to Fig. 2 and can draw the Injection Pump speed characteristics, see that A is the fuel delivery per cycle of declared working condition point shown in the EDA section of Fig. 3 curve 1.The fuel consumption rate value of corresponding rotating speed among maximum torque, speed at maximum torque value and the Fig. 1 that requires according to diesel engine then; Can draw the required circulating fuel injection quantity of Maximum Torque operating point (the C point oil mass value of Fig. 3), the outage that the D on C point and the curve 1 is ordered is for proofreading and correct the oil mass Δ
V bBy proofreading and correct oil mass
Δ V bDetermine and make the correction stroke Δ X (Fig. 1) that oil-limiter is used; X is 0.13～0.17mm like 186F serial diesel engine Δ; This value can make the diesel engine torque reserve between 12～20%, also to the manufacturing tolerance range is provided, and too the high pulling torque deposit can make the diesel engine smoke intensity exceed standard.
The starting upgraded stroke Δ of oil-limiter Y is confirmed that by starting upgraded oil mass the diesel engine starting oil mass is generally 1.3～1.5 times of declared working condition point fuel injection quantity, and required actual cycle fuel feeding value when drawing diesel engine starting is in view of the above seen G point among Fig. 3.And according to the oily Injection Pump speed characteristics (Fig. 3 of rigidity limit; Curve 1) fuel delivery is the H point among Fig. 3 when starting speed; Curve 2 is that diesel engine satisfies the Injection Pump speed characteristics that Maximum Torque requires among Fig. 3; Curve 2 and curve 1 after speed at maximum torque (C, D point back) both are substantially parallel (Injection Pump speed characteristics of both different fuel feeding positions).Fuel delivery is the G point among Fig. 3 during the correspondence starting speed; Difference between G point and the K point is the required correction enriching oil mass of starting; Play the increment that normal moveout correction enriching oil mass draws the Injection Pump effective delivery stroke according to this; Thereby draw the starting upgraded stroke Δ of oil-limiter Y, Y is 0.85～0.93mm like 186F serial diesel engine Δ.
The primer spring pretightening force is another extremely important parameter of oil-limiter, and requirement need guarantee that primer spring is inoperative on the diesel speed characteristic, like primer spring in its effect of a certain rotating speed; Spring is compressed; The adjustable stem of oil-limiter moves fuel delivery is increased, and moment of torsion can increase, but the starting stroke is big; Spring rate is little, can cause the diesel engine over-emitting black exhaust.Must be below 55% of rated engine speed according to NBS by the minimum speed of non-road way diesel speed characteristic; Therefore diesel engine at least before 50% rated engine speed primer spring can not work, promptly this moment, the primer spring pretightening force must be greater than stressed (this power size be relevant with governor structure, diesel engine speed etc.) of oil-limiter push rod.After drawing oil-limiter push rod stressed by the speed regulator working principle, provide the requirement that starting upgraded spring rate and pretightening force satisfy the primer spring pretightening force.
Fig. 4 is used for the diesel speed characteristic that the 186FA diesel engine makes an experiment and obtains with the oil-limiter that the present invention designs; This machine torque reserve reaches 13.6 %; Speed at maximum torque is 2800r/min, and diesel engine examination scope smoke intensity is 2.2FSU, satisfies the requirement of NBS each item performance assessment criteria.
Claims (1)
1. the oil-limiter that single cylinder diesel is proofreaied and correct with the band oil mass is characterized in that: be made up of adjustable stem (1), correction body (2), correcting spring seat (3), primer spring (4), correction nut (5) and correcting spring (6); Said adjustable stem (1), correcting spring (4) are assemblied in the correcting spring seat (3), and the gap of adjustable stem (1) right-hand member and correcting spring seat (3) bottom is the oil mass correction stroke Δ X that torque correction is used; What lay between correcting spring seat (3) and the correction body (2) is primer spring, and correcting spring seat (3) is starting upgraded correction stroke Δ Y with the gap of proofreading and correct nut (5); One end in contact of adjustable stem (1) front end and governor lever, governor lever are stirred Injection Pump oil mass shift fork and are changed fuel delivery; The oil mass correction stroke Δ X that said torque correction uses is 0.13-0.17mm; Said starting upgraded correction stroke Δ Y is 0.85-0.93mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010521350 CN101949329B (en) | 2010-10-27 | 2010-10-27 | Oil limiter having function of correcting oil mass for single cylinder diesel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010521350 CN101949329B (en) | 2010-10-27 | 2010-10-27 | Oil limiter having function of correcting oil mass for single cylinder diesel and manufacturing method thereof |
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| CN101949329A CN101949329A (en) | 2011-01-19 |
| CN101949329B true CN101949329B (en) | 2012-12-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374036A (en) * | 2011-11-07 | 2012-03-14 | 陈万荣 | Oil limiter of diesel engine |
| CN104153895B (en) * | 2014-08-07 | 2016-09-14 | 周继光 | The pneumatic fuel limit device of mixed combustion engine |
| CN114673593B (en) * | 2022-04-22 | 2023-01-06 | 潍柴动力股份有限公司 | Cold start auxiliary device and engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109326A (en) * | 2007-04-10 | 2008-01-23 | 江苏江淮动力股份有限公司 | Speeder for single cylinder diesel engine |
| CN201972785U (en) * | 2010-10-27 | 2011-09-14 | 江苏大学 | Oil limiter with oil quantity correction for single cylinder diesel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109326A (en) * | 2007-04-10 | 2008-01-23 | 江苏江淮动力股份有限公司 | Speeder for single cylinder diesel engine |
| CN201972785U (en) * | 2010-10-27 | 2011-09-14 | 江苏大学 | Oil limiter with oil quantity correction for single cylinder diesel |
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