CN102662073B - Lug-Down engine speed detection method - Google Patents
Lug-Down engine speed detection method Download PDFInfo
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- CN102662073B CN102662073B CN201210152220.7A CN201210152220A CN102662073B CN 102662073 B CN102662073 B CN 102662073B CN 201210152220 A CN201210152220 A CN 201210152220A CN 102662073 B CN102662073 B CN 102662073B
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- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 238000011156 evaluation Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
Lug-Down engine speed detection method, by the measuring vehicle speed of a motor vehicle corresponding engine speed that converts, first determine vehicle velocity V e corresponding to vehicle specifies gear description rated engine speed that examine, when measuring vehicle velocity V i, can obtain weight coefficient Ki=Vi/Ve, calculate the engine speed ni that Vi is corresponding, whether the rated engine speed of no matter logining is correct, all can carry out the accurate evaluation specified states speed of a motor vehicle and put with weight coefficient Ki the ratio of corresponding engine speed and description rated engine speed, without being installed, engine speed instrument sensor measures engine speed, accuracy and operability are greatly improved, be applicable to measuring station to numerous detecting and assessings using vehicle engine speed.
Description
Technical field
Lug-Down engine speed detection method is that diesel vehicle Lug-Down on chassis dynamometer detects toxic emissionTime, the speed of a motor vehicle is converted into the detection method of engine speed, belong to automotive performance Platform test method and technology field.
Background technology
Normal in order to ensure in the diesel technology parameter detecting with the toxic emission of diesel vehicle Lug-Down, prevent that throttle is too smallOr fuel delivery is too small, not only to the requirement of wheel power finite value, to also finite value requirement of engine speed, prior art is wantedAsk a merit machine rotating speed of measuring each speed of a motor vehicle point. Adopt engine speed instrument to measure diesel engine speed, exist operability andThe contradiction of accuracy, if adopt the higher engine speed instrument of accuracy to measure, installs the operation of rotational speed meters sensorProperty is very poor; If adopt the adsorption vibration formula sensor of preferable operability, detection accuracy is very poor. In detection practice,Often be difficult to know the rated speed of examined vehicle description diesel engine, easily the rated speed of input error causes a large amount ofThe misjudgement of engine speed false retrieval. So, for overcoming the deficiencies in the prior art, adopt the Lug-Down engine speed of innovationDetection method, improves accuracy and operability that engine speed detects greatly.
Summary of the invention
Test statistics shows, same model series different automobile types is at directly gear or to approach gearratio be most 1 gear of gearboxTime, although rated engine speed differs greatly, the speed of a motor vehicle that rated engine speed is corresponding differs less. Set certain carThe rated engine speed of institute's inspection vehicle of type series is ne, and gearbox directly keeps off or gearratio approaches the corresponding car of 1 gearSpeed is Ve, and Ve can determine by vehicle calculation of parameter, also can determine by vehicle series statistics, also can be to concrete carType is measured after engine speed is demarcated with the ratio of the speed of a motor vehicle and is deposited computer in, Automatically invoked when same model detects. If send outThe ratio K=ne/Ve of engine speed and the speed of a motor vehicle, is Vi when measuring the speed of a motor vehicle, corresponding engine speed ni=Vi × K=Vi ×Ne/Ve. If do not know rated engine speed ne, in the time of login, input wrong rated engine speed nc, can obtainTo wrong ratio K c=nc/Ve, in the time that to measure the speed of a motor vehicle be identical Vi, obtain wrong corresponding engine speed nic=Vi× Kc=Vi × nc/Ve. Making ni/ne=nic/nc=Vi/Ve=Ki, is determined value for the Ve of concrete institute inspection vehicle,Just obtain Ki to measured value Vi, the linear proportional relation of Ki and Vi. Ni=Ki × ne, nic=Ki × nc. Can tieOpinion: if inputted wrong rated engine speed, relatively input correct rated engine speed, that calculates sends outEngine speed value has error, but wrong engine speed does not become with the ratio of the rated engine speed of input errorChange, Ki is irrelevant with the correctness of login description rated engine speed, the engine speed limit value that current standard requiresBe the ratio of engine speed and login rated engine speed, measuring process adopts the Ki instant engine that converts to turn soSpeed nic=Ki × nc, accurately carries out measurement and the evaluation of the relative description rated speed of engine speed weight coefficient. By existingColumn criterion requires to measure engine speed, can measure engine speed without engine speed instrument sensor is installed, whenMeasure after the speed of a motor vehicle, adopt weight coefficient to convert and obtain engine speed, greatly improved the accuracy and the operability that detect.
Lug-Down engine speed detection method is that diesel vehicle regulation gear Lug-Down on chassis dynamometer detects uselessWhen gas discharge, the speed of a motor vehicle is converted into the method for engine speed. It is characterized in that: by vehicle calculation of parameter or by vehicle beRow are added up or are deposited computer Automatically invoked in by demarcation and accurately determine Ve, and Ve is that diesel vehicle regulation gear description startsThe speed of a motor vehicle that machine rated speed ne is corresponding, the Ve difference of different gearbox gears. Be Vi when measuring the speed of a motor vehicle, corresponding startsMachine rotating speed is ni, makes ni/ne=Vi/Ve=Ki, ni=Ki × ne, and Ki is the weight coefficient of the relative ne of ni, Ki and ViLinear direct ratio, no matter whether the ne of input is correct, ratio ni/ne=Vi/Ve is constant, turns without engine is installedSpeed instrument sensor is measured engine speed, can calculate engine speed corresponding to this speed of a motor vehicle according to the measuring car speed Vi of institute,And obtain ratio ni/ne, when the evaluation index of engine speed is that the specified states speed of a motor vehicle is put corresponding engine speed and saysThe ratio of bright book rated engine speed, by weight coefficient accurate evaluation. If do not require that the merit machine of sending out of measuring each speed of a motor vehicle point turnsSpeed, only evaluates a specified states speed of a motor vehicle and puts the ratio of corresponding engine speed and description rated engine speed, orOnly evaluate the ratio of a specified states speed of a motor vehicle point and the benchmark speed of a motor vehicle, without the speed of a motor vehicle is converted into engine speed, VeBe set as the benchmark speed of a motor vehicle, evaluate with the weight coefficient Ki of specified states speed of a motor vehicle point. Lug-Down engine speed detectsThe advantage of method is as follows:
1, without the sensor that engine speed instrument is installed, detection efficiency, accuracy and operability have greatly been improved.
2, the certainty of measurement of the speed of a motor vehicle is far away higher than the measurement of engine rotate speed precision with regard to car formula, by speed of a motor vehicle conversion engineRotating speed, can reduce fluctuation and the error of measurement of engine rotate speed value greatly.
Even 3 login incorrect description rated engine speed, the still accurate computational rules state speed of a motor vehicleThe ratio of engine speed corresponding to point and description rated engine speed, accurately judgement, without misjudgement, is applicable to measuring station very muchTo numerous detecting and assessings using vehicle engine speed.
4, determine that the error of Ve is far smaller than the measure error of adsorption vibration formula rotational speed meters.
5, can calculate engine speed value, also can carry out record with the weight coefficient of description rated engine speedEngine speed.
Detailed description of the invention
Carry out Lug-Down toxic emission taking 6100 certain model passenger vehicle of vehicles series and detect as example, illustrate that Lug-Down sends outThe detailed description of the invention of engine speed detection method:
If 1 series of the vehicle by GB GB18565-2001 " requirement of commerial vehicle combination property and the method for inspection " systemMeter is determined Ve,, the direct gear rated power benchmark speed of a motor vehicle from table 1 obtains Ve=85km/h, logins correct description and sends outMotivation rated speed 2400r/min.
2, in the time measuring vehicle velocity V i=75km/h, its corresponding engine speed ni=75 × 2400/85=2118r/min. ?Directly the maximum wheel power speed of a motor vehicle steady state measurement speed of a motor vehicle of gear is 72.6km/h, corresponding engine speed n72.6＝72.6×2400/85=0.854 × 2400=2050r/min. If do not know this passenger vehicle description rated engine speed, Ke YirenMeaning login description rated engine speed ne, n72.6=72.6 × ne/85=0.854 × ne, turns by description constant engineThe weight coefficient of speed carrys out recording engine rotating speed.
If 3 by GB GB3847-2005 " C.I. Engines of Automobile and compression ignition engine automobile exhaust smoke rowPut limit value and measuring method " J.4.5.5 money specify: when the maximum wheel power speed of a motor vehicle corresponding engine speed and engineThe engine calibration rotating speed that manufactory specifies compares, as exceedes rated engine speed ± 10%, thinks that vehicle detection does not conform toLattice failure. Engine speed n72.6Description rated engine speed ne ratio is 72.6/85=0.854 relatively, evaluatesFor defective. If do not need to measure engine speed, only evaluate the engine speed of maximum wheel power speed of a motor vehicle point and sayThe ratio of bright book rated engine speed, or only evaluate the ratio of a specified states speed of a motor vehicle point and the benchmark speed of a motor vehicle, can setVe is the benchmark speed of a motor vehicle, evaluates with the weight coefficient Ki=72.6/85=0.854 of maximum wheel power speed of a motor vehicle point.
3, by the engine speed that engine speed instrument synchronous steady is more accurately measured maximum wheel power speed of a motor vehicle point be2012r/min, error is (2050-2012)/2012=1.9%.
Lug-Down engine speed detection method, have accurately, simply, advantage efficiently, greatly reduced engineThe false retrieval misjudgement of rotating speed, has improved accuracy and operability.
Claims (1)
1. Lug-Down engine speed detection method is that diesel vehicle regulation gear lug down method on chassis dynamometer detects uselessA kind of method of carrying out rotating ratio evaluation when gas discharge, is characterized in that: same model series different automobile types is directly kept off at gearboxOr when to approach gearratio be most 1 gear, although rated engine speed differ greatly, the car that rated engine speed is correspondingIt is less that speed differs, by the vehicle series statistics of GB GB18565-2001 " requirement of commerial vehicle combination property and the method for inspection " reallyDetermine Ve, Ve is diesel vehicle regulation gear description rated engine speed neThe corresponding speed of a motor vehicle; Evaluate a specified states speed of a motor vehicleThe ratio of engine speed corresponding to some Vi and description rated engine speed, is set as the benchmark speed of a motor vehicle Ve, uses specified statesThe weight coefficient Ki=Vi/Ve of speed of a motor vehicle point Vi evaluates, and can measure engine without engine speed instrument sensor is installedRotating speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210152220.7A CN102662073B (en) | 2012-05-05 | 2012-05-05 | Lug-Down engine speed detection method |
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| CN201210152220.7A CN102662073B (en) | 2012-05-05 | 2012-05-05 | Lug-Down engine speed detection method |
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| CN102662073A CN102662073A (en) | 2012-09-12 |
| CN102662073B true CN102662073B (en) | 2016-05-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101130364A (en) * | 2006-08-21 | 2008-02-27 | 五十铃自动车株式会社 | vehicle travel control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101130364A (en) * | 2006-08-21 | 2008-02-27 | 五十铃自动车株式会社 | vehicle travel control |
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| 告诉新手们转速与车速的关系！！！不要再无知了！！;fy_li;《同悦论坛http://club.autohome.com.cn/bbs/thread-c-148-2174959-1.html》;20090119;主贴 * |
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Effective date of registration: 20200817 Address after: 225700 Jiangsu city of Taizhou province Xinghua City Zhang Guo Zhen Yumin Road No. 18 Patentee after: TAIZHOU JIEXIN MACHINERY EQUIPMENT Co.,Ltd. Address before: 528415, Xiaolan Town, Xiaolan Town, Zhongshan, Guangdong, No. 16 vehicle Siu Lam inspection station Patentee before: Wu Ming |