CN103148906A - Platform testing diesel oil vehicle correction rate output volume circulation fuel capacity statistical method - Google Patents
Platform testing diesel oil vehicle correction rate output volume circulation fuel capacity statistical method Download PDFInfo
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- 239000002283 diesel fuel Substances 0.000 title claims abstract description 10
- 238000007619 statistical method Methods 0.000 title claims abstract description 10
- 238000012360 testing method Methods 0.000 title abstract description 7
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Abstract
A platform testing diesel oil vehicle correction rate output volume circulation fuel capacity statistical method is a method for detecting a diesel oil vehicle 50km/h or 60 km/h constant speed platform testing simulation road test full quality one kilometer fuel consumption capacity and counting a correction ratio output volume circulation fuel oil capacity qc range, and comprises the following steps: a quantity value relationship between the qc and one-kilometer fuel consumption capacity is established, the one-kilometer fuel consumption capacity limiting values of various vehicles are taken as a counting standard to regulate that the vehicle speed is corresponding to lower rotation speed of an engine for calculation; and counting all detection of qc less than 40 mg/(L.circulation) of the available vehicle, and setting an engine factor that fm=0.3 without needing various technical parameters of the vehicle engine, the gearbox, tires and the like and without calculating the qc values, so that the method has the advantages of accuracy, simplicity, quickness and good operability.
Description
Technical field
The bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method, that the diesel vehicle bench teat carries out the fuel economy detection, the Fuel Consumption of the correction of the Fuel Consumption under the testing environment state under the reference atmosphere state, determine to proofread and correct the method than discharge capacity fuel delivery per cycle scope during calculation engine corrected coefficient of power a, belong to automotive performance Platform test technical field.
Background technology
When existing diesel vehicle bench teat dynamic property, lug down method toxic emission detection, normally detect under the maximum throttle full load mode, and power is usually in (75%～100%) rated power scope, and the power limit scope is usually at 25% ratings, proofreading and correct than discharge capacity fuel delivery per cycle q
cSetting is greater than 65mg/ (rising circulation), engine factor f
m=1.2 as definite value, and the error that calculating a causes is little for the correct evaluation impact of power.The accuracy that detects in order to improve the bench teat Fuel Consumption, at Chinese invention patent application " the oil consumption detection of vehicle standard state and conversion method ", application number: in 201210102593.3, need calculation engine corrected coefficient of power a.The limit value of diesel vehicle Fuel Consumption usually in the scope of 10% ratings, and is to detect under the negative model operating mode of the engine section of vehicle sections throttle, if q
cSetting is greater than 65mg/ (rising circulation), engine factor f
m=1.2 as definite value, can cause very large error.When measuring station detects hundred kilometric fuel consumptions to diesel vehicle by standard 50km/h or the examination of 60km/h constant speed simulation road on chassis dynamometer, due to too many with vehicle, complete whole vehicle technical parameters storehouse can not be arranged, be difficult to accurately calculate q
cValue easily causes a value error larger.It is to dissimilar car statistics than discharge capacity fuel delivery per cycle statistical method that the bench teat diesel vehicle is proofreaied and correct, hundred kilometric fuel consumption limit values with reference to defined in GB/T18566-2011 " road transport fuel consumption in vehicles amount method of determination and evaluation " obtain q more accurately after statistical study
cThe value scope.
Summary of the invention
The bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method, and by standard GB/T18566-2011 " road transport fuel consumption in vehicles amount method of determination and evaluation ", it is Q that constant speed 50km/h or 60km/h measure hundred kilometric fuel consumptions
g, unit rises/hundred kilometers, for a detection Q
gValue is proofreaied and correct and is compared under unified normal condition and estimate, and need to proofread and correct with engine capacity correction factor a engine factor f
mImpact on a is very large, and proofreaies and correct than discharge capacity fuel delivery per cycle q
cTo f
mImpact very large, by the appendix C of standard GB/T18276-2000 " vehicle dynamic quality Bench test methods and evaluation index ", calculation correction is than discharge capacity fuel delivery per cycle q
c, its unit is every liter of total displacement of the every circulation of milligram, the mg/ of unit (rising circulation), computing formula q
c=q/r supposes that engine is the natural aspiration mode, the air-breathing pressure ratio r=1 of engine, q
c=q, q are than discharge capacity fuel delivery per cycle.
By standard GB/T18566-2011 standard, being located at bench teat, to measure hundred kilometric fuel consumptions apart from S rice or time t in second be Q
g, unit is for rising/100 kilometers, and setting diesel oil density is 0.835 kilogram/liter, multiply by 0.835 Q
gBe converted into the unit of kilogram per 100 km, time t=3.6 * S/V, the s of unit, V is the regulation constant speed speed of a motor vehicle, the km/h of unit, and diesel engine per minute fuel feeding cycle index is n/2, n is engine speed, unit is rev/min, and per second fuel feeding cycle index is n/120, and the circulation total degree is N=t * n/120=3.6 * S * n/ (120 * V), the total displacement of known diesel engine is the L liter, S=100 kilometer=100000m, V=50km/h, q
c=1000000 * 0.835 * Q
g/ (N * L)=1000000 * 0.835 * 120 * V * Q
g/ (3.6 * 100000 * n * L)=278.3 * V * Q
g/ (n * L), the mg/ of unit (rising circulation) makes Kv=V/n, q
c=278.3 * Kv * Q
g/ L.
Engine speed n when calculating or measuring vehicle constant speed can be according to vehicle technology calculation of parameter n=V * (i
1* i
0)/(0.377 * R), V is the regulation constant speed speed of a motor vehicle, the km/h of unit, i
1Be wheel box top gear position ratio of gear, i
0Be final ratio, R is that wheel calculates rolling radius, the m of unit.Measuring station is difficult to improve complete vehicle technical parameter database detecting with vehicle to numerous, accurately calculate q to numerous vehicles
cVery large difficulty is arranged, and accuracy or the operability of measuring engine speed with velocity gauge are bad.
Calculate q by the low engine speed 1000r/min of the top gear 50km/h of wheel box
cValue by C4.1.1 money in standard GB/T18276-2000, is being proofreaied and correct than discharge capacity fuel delivery per cycle q
c=q/r value is during lower than 40mg/ (rise circulation), and q is than discharge capacity fuel delivery per cycle, f
mDesirable steady state value 0.3 (f
m=0.3), establish the r=1 of NA engine, q
c=q=278.3 * 50 * Q
g/ (1000 * L)＜40, solve Q
gDesirable f during＜2.875 * L
m=0.3, if engine with supercharger r is greater than 1, q＞q
c, more satisfy q
c＜40 condition by statistics, is being not less than 7 liters, Q with diesel oil passenger vehicle length 12m or in the total displacement of engine with 13 tons of diesel-powered truck gross masses
g＜2.875 * 7=20.125, by the limit value of standard GB/T18566-2011 appendix C as can be known, the limit value of the coach luxury coach constant speed 60km/h that 12m is long is 20.1＜20.125, the middle rank that 12m is long and the limit value of regular grade passenger vehicle are 18.3＜20.125, the limit value of 13 tons of lorries is 20.0＜20.125, the meaning of its statistics is, the qualified Q using car of hundred kilometric fuel consumptions of these vehicles
gLess than 20.125, q
cLower than 40mg/ (rising circulation).So, be not more than with diesel oil passenger vehicle and specified gross mass 13 tons can set q with diesel-powered truck (bicycle)
cLower than 40mg/ (rising circulation), get f
m=0.3, can greatly simplify calculating like this, even the engine speed of extremely indivedual vehicle 50km/h speed of a motor vehicle is also little lower than the error that 1000r/min causes.
In standard GB/T18566-2011 the Fuel Consumption limit value of defined be good technique state vehicle hundred kilometric fuel consumptions 110%, major part is using diesel vehicle less than this limit value, fraction is also not too large at the value that surpasses this limit value with diesel vehicle, is rationally and suitable surplus is arranged as actual hundred kilometric fuel consumptions of vehicle with this limit value.
According to large quantitative statistics, the max. speed of heavy-duty diesel vehicle is relatively low, the also corresponding increase of engine speed that the corresponding 50km/h speed of a motor vehicle is corresponding, and Kv reduces, and the L value is corresponding increase also, and the air-breathing mode of great majority employing supercharging, and r makes q greater than 1
cGreatly reduce." if the adhesion between semi-trailer train driving wheel and cylinder produces tyre slip less than Frame resistance, should calculate stand by the fully loaded gross mass of tractor (bicycle) and load resistance " by the 8.5th section of regulation of standard GB/T18566-2011.This situation is surveyed hundred kilometric fuel consumptions and is greatly descended, and calculates and operation for simplifying, and also can set q to other heavy goods vehicles
cLess than 40mg/ (rising circulation), get f
m=0.3, substantially conform to actual conditions.
The bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method, be that the top gear constant speed simulation road examination of all kinds diesel vehicle wheel box on chassis dynamometer total quality detects Fuel Consumption, during calculation engine corrected coefficient of power a, statistical correction is than discharge capacity fuel delivery per cycle q
cThe method of scope is characterized in that: diesel vehicle 50km/h or 60km/h constant speed bench teat simulation road examination total quality hundred kilometric fuel consumptions detect, and first set up q
cMagnitude relationship with hundred kilometric fuel consumptions, using the various of standard criterion vehicle hundred kilometric fuel consumption limit values as corresponding hundred kilometric fuel consumptions that detect, calculate with 50km/h or the low engine speed of 60km/h correspondence, add up the correction of all various diesel oil passenger vehicles and part diesel-powered truck bicycle than discharge capacity fuel delivery per cycle q
cLess than 40mg/ (rising circulation), set engine factor f
m=0.3 is constant.In like manner add up, the max. speed of heavy-duty diesel vehicle is relatively low, the corresponding increase of engine speed that the 50km/h speed of a motor vehicle is corresponding, the also corresponding increase of the total displacement of diesel engine, and the air-breathing mode of most of relatively high power diesels engine for automobile employing superchargings, the air-breathing pressure ratio r of engine makes q greater than 1
cCorresponding reducing also added up the q of heavy-duty diesel vehicle
cLess than 40mg/ (rising circulation), all vehicle detects and need not to calculate q
cValue is set engine factor f
m=0.3 is constant.Technological merit of the present invention is as follows.
(1) set up q
cWith the magnitude relationship of hundred kilometric fuel consumptions, can by the diesel oil density under normal condition, volume per 100 km unit conversion be become and q
cIdentical unit, convenient statistics.
(2) using the various of standard criterion vehicle hundred kilometric fuel consumption limit values as corresponding hundred kilometric fuel consumptions that detect, has accurate, simple, good statistics benchmark, not only be adapted at the bench teat statistics benchmark with vehicle, be fit to equally the bench teat statistics benchmark of Fuel Consumption various new models relatively less than normal.
(3) max. speed of the rated speed top gear of the various vehicle diesel engines of statistics, obtain the statistics engine speed on the low side of top gear 50km/h, add up total displacement of various vehicle diesel engines, press inequality and calculate, thus determine all various diesel oil passenger vehicles and part with the correction of diesel-powered truck bicycle than discharge capacity fuel delivery per cycle q
cLess than 40mg/ (rising circulation), set engine factor f
m=0.3 is constant.
(4) characteristics of statistics heavy goods vehicles diesel engine, the max. speed of heavy-duty diesel vehicle is relatively low, the corresponding increase of engine speed that the 50km/h speed of a motor vehicle is corresponding, the also corresponding increase of the total displacement of diesel engine, employing boosted suction mode can equivalent reduce total displacement of engine, as adopting the natural aspiration mode, total corresponding increase of displacement, so most of relatively high power diesels engine for automobile adopt the air-breathing mode of supercharging, the air-breathing pressure ratio r of engine makes q greater than 1
cGreatly reduce the q of statistics heavy-duty diesel vehicle
cLess than 40mg/ (rising circulation), set engine factor f
m=0.3 is constant.
(5) diesel vehicle 50km/h or 60km/h constant speed bench teat simulation road examination total quality hundred kilometric fuel consumptions detect, and statistics is determined the q of whole vehicles
cLess than 40mg/ (rising circulation), need not many relevant art parameters of institute's inspection vehicle, also need not to calculate q
cValue is set engine factor f
m=0.3 is constant.Under the prerequisite that guarantees accuracy, greatly improved the operability that detects.
Embodiment
The embodiment that the bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method is exemplified below:
The physical dimension of one the 12 meters type passenger vehicles of growing up (length * wide * height) 11995mm * 2550mm * 3600mm, kerb weight 11900kg, gross mass 17150kg, rating of engine P
eBe 199kW, rated speed n
eBe 2200r/min, air-breathing mode is booster-type, and the total displacement L of engine is 7.8 liters, the top gear i of wheel box
1Be 0.74, tire radius R is 0.495m, final ratio i
0Be Kv=V/n=(0.377 * R)/(i of 4.44,50km/h and 60km/h
1* i
0)=(0.377 * 0.495)/(0.74 * 4.44)=0.0568, the Kv of the different speed of a motor vehicle of the same gear of same vehicle equates, but engine speed do not wait, and as not considering pressure ratio, engine is natural aspiration mode r=1, q
c=q supposes that this vehicle is middle rank or regular grade passenger vehicle, and the hundred kilometric fuel consumption limit values of constant speed 50km/h are 18.3, q
c=278.3 * V * Q
g/ (n * L)=278.3 * 0.0568 * Q
g/ 7.8=2.0266 * Q
g, make 2.0266 * Q
g＜40, solve Q
g＜19.7, greater than limit value 18.3, if this vehicle is coach luxury coach, the hundred kilometric fuel consumption limit values of constant speed 60km/h are 20.1 ≈ 19.7, because engine is the boosted suction mode, and r＞1, q
c=q/r more satisfies q
c＜40mg/ (rising circulation), so, f can be established
m=0.3.
A semi-trailer train, kerb weight 7110kg, the gross mass that accurate towed vehicle gross mass 39500kg, tractor add trailer is 7110+39500=46610kg, rating of engine 225kW, rated speed 2200r/min, wheel box top gear ratio of gear i
1=1, single-stage main transmission adds hub reduction, max. speed 93km/h, and the total volume of cylinder L of engine is 9.726 liters, calculating K v=0.041, the air-breathing mode of engine is charge inter cooling, rated boost is than r=2.3, qc=q/r=278.3 * Kv * Q
g/ (r * L)=278.3 * 0.041 * Q
g/ (2.3 * 9.726)＜40, Q
g＜78.4, much larger than limit value 47.3, only need pressure ratio 1.4, q
c=q/r=278.3 * Kv * Q
g/ (r * L)=278.3 * 0.041 * Q
g/ (1.4 * 9.726)＜40 solve Q
g＜47.7 greater than limit value 47.3, satisfies q fully
c＜40mg/ (rising circulation), so, f can be established
m=0.3.
The bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method, measure detection at bench teat simulation road examination vehicle total quality 50km/h or 60km/h constant fuel consumption, need not the various technical parameters such as vehicle motor, wheel box, tire, all can add up q with the car test survey
cLess than 40mg/ (rising circulation), set engine factor f
m=0.3, have advantages of accurate, simple, quick, good operability.
Claims (1)
1. the bench teat diesel vehicle is proofreaied and correct than discharge capacity fuel delivery per cycle statistical method, be that the top gear constant speed simulation road examination of all kinds diesel vehicle wheel box on chassis dynamometer total quality detects Fuel Consumption, during calculation engine corrected coefficient of power a, statistical correction is than discharge capacity fuel delivery per cycle q
cThe method of scope is characterized in that: diesel vehicle 50km/h or 60km/h constant speed bench teat simulation road examination total quality hundred kilometric fuel consumptions detect, and first set up q
cMagnitude relationship with hundred kilometric fuel consumptions, using the various of standard criterion vehicle hundred kilometric fuel consumption limit values as corresponding hundred kilometric fuel consumptions that detect, calculate with 50km/h or the low engine speed of 60km/h correspondence, add up the correction of all various diesel oil passenger vehicles and part diesel-powered truck bicycle than discharge capacity fuel delivery per cycle q
cLess than 40mg/ (rising circulation), set engine factor f
m=0.3 is constant.In like manner add up, the max. speed of heavy-duty diesel vehicle is relatively low, the corresponding increase of engine speed that the 50km/h speed of a motor vehicle is corresponding, the also corresponding increase of the total displacement of diesel engine, and the air-breathing mode of most of relatively high power diesels engine for automobile employing superchargings, the air-breathing pressure ratio r of engine makes q greater than 1
cCorresponding reducing also added up the q of heavy-duty diesel vehicle
cLess than 40mg/ (rising circulation), all vehicle detects and need not to calculate q
cValue is set engine factor f
m=0.3 is constant.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300702A (en) * | 2015-11-20 | 2016-02-03 | 吴明 | Determination method of vehicle diesel engine factor |
| CN109990858A (en) * | 2018-01-03 | 2019-07-09 | 陕西汽车集团有限责任公司 | Diesel Methanol double fuel commercial vehicle fuel economy evaluation method and device |
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2013
- 2013-02-18 CN CN201310069370.6A patent/CN103148906B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963519A (en) * | 2010-07-17 | 2011-02-02 | 吴明 | Road test-simulated standard-state fuel consumption detection method based on bench test |
| CN102607659A (en) * | 2012-02-03 | 2012-07-25 | 吴明 | Method for fuel detection and conversion in vehicle standard state |
Non-Patent Citations (2)
| Title |
|---|
| 国家质量技术监督局: "《GB/T18276-2000汽车动力性台架试验方法和评价指标》", 18 December 2000, article "汽车动力性台架试验方法和评价指标" * |
| 国家质量监督检验检疫总局、国家标准化管理委员会: "《GB/T18566-2011道路运输车辆燃料消耗量检测评价方法》", 29 September 2011, article "道路运输车辆燃料消耗量检测评价方法" * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300702A (en) * | 2015-11-20 | 2016-02-03 | 吴明 | Determination method of vehicle diesel engine factor |
| CN109990858A (en) * | 2018-01-03 | 2019-07-09 | 陕西汽车集团有限责任公司 | Diesel Methanol double fuel commercial vehicle fuel economy evaluation method and device |
| CN109990858B (en) * | 2018-01-03 | 2021-02-09 | 陕西汽车集团有限责任公司 | Method and device for calculating fuel economy of diesel-methanol dual-fuel commercial vehicle |
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