CN110987473A - Distance correction method for transient fuel or waste gas of automobile bench test - Google Patents
Distance correction method for transient fuel or waste gas of automobile bench test Download PDFInfo
- Publication number
- CN110987473A CN110987473A CN201911298844.8A CN201911298844A CN110987473A CN 110987473 A CN110987473 A CN 110987473A CN 201911298844 A CN201911298844 A CN 201911298844A CN 110987473 A CN110987473 A CN 110987473A
- Authority
- CN
- China
- Prior art keywords
- working condition
- distance
- fuel consumption
- sampling point
- theoretical
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
- G01F9/02—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine wherein the other variable is the speed of a vehicle
Abstract
The distance correcting method for transient fuel or waste gas of automobile bench test detects transient fuel consumption or transient waste gas discharge or reads instantaneous detection quantity from OBD, respectively calculates theoretical acceleration or deceleration of each working condition according to each theoretical time and speed of acceleration or deceleration, then calculating the theoretical speed V1i and the theoretical distance S1i of each sampling point, the acceleration of the constant speed working condition is 0, the distance of the idling working condition is 0, after detecting the instantaneous actual speed V2i, the actual distance S2i and the fuel consumption or the exhaust emission Q2i of each sampling point, the correction value Q1i for each sampling point is calculated as Q2i × S1i/S2i, in the idle condition, the average value of V2i equal to 0 is taken as the correction value of each sampling point, or the distance detection value is read from the OBD, the detection value of the OBD vehicle speed is firstly converted into the detection value of the drum vehicle speed, and then the theoretical distance correction is carried out, and the correction can be carried out according to each sampling point or each working condition.
Description
Technical Field
A distance correction method for transient fuel or waste gas of automobile bench test is a method for detecting the fuel consumption or waste gas discharge of automobile by simulating the specified road test transient working condition on a chassis dynamometer of the automobile, belonging to the technical field of automobile detection.
Background
The existing automobile bench test is used for detecting the fuel consumption or the exhaust emission under the transient working condition, the automobile simulates the road test circulation transient working condition specified in urban areas or suburbs on a chassis dynamometer, a fuel consumption flowmeter or a carbon balance fuel consumption meter is used for detecting the fuel consumption of hundreds of kilometers, or a gasoline automobile is used for detecting the exhaust emission quality of each kilometer by adopting a simple transient working condition method, the instantaneous speed deviates from the theoretical speed by operating an accelerator, so that the difference between the actual distance and the theoretical distance is larger, and the difference between the fuel consumption or the exhaust emission under different acceleration, constant speed and deceleration working conditions is larger at the same distance, so that a larger detection error is easily caused. The distance correction method for transient fuel or waste gas of automobile bench test overcomes the defects of the prior art, and corrects the detection values of each idle speed, acceleration, constant speed and deceleration working condition of the specified transient working condition on the theoretical distance, thereby improving the accuracy and the repeatability of detection.
Disclosure of Invention
When the bench test simulates the detection of the specified transient working condition of the road test, the instantaneous fuel consumption or the instantaneous exhaust emission is detected from the fuel detector or the instantaneous value of the fuel or the exhaust is read from the OBD, and the fuel consumption or the exhaust emission of each sampling point of the idling, accelerating, constant speed and decelerating working conditions of the specified transient working condition is corrected to the theoretical distance. The theoretical vehicle speed V1i and the theoretical distance S1i of each sampling point and the sampling interval are calculated according to the theoretical acceleration or deceleration of each working condition under each specified acceleration, constant speed and deceleration working condition, the acceleration is 0 under the constant speed working condition, the normal sampling interval is 1 second, the actual vehicle speed V2i and the actual distance S2i of each sampling point are detected under each working condition, after the fuel consumption or the exhaust emission Q2i of each sampling point is detected, the corrected fuel consumption or the exhaust emission Q1i of each sampling point is calculated to be Q2i multiplied by S1i/S2i, the distance of vehicle speed remaining under the deceleration working condition or the distance of early acceleration is left under the idling working condition, the distance is not counted, the average value is calculated by taking the whole fuel consumption or exhaust emission of the vehicle speed to be 0 under the idling working condition, and the average value is taken as the fuel or exhaust emission of each sampling point of the working condition. And calculating the hundred-kilometer fuel consumption or the exhaust emission per kilometer of each sampling point by using the correction value Q1i of each sampling point and the theoretical total distance S, accumulating to obtain the accumulated corrected hundred-kilometer fuel consumption or the accumulated corrected exhaust emission per kilometer of each working condition and the specified transient full working condition, wherein the accumulated correction value of the specified transient full working condition is the detection result value. Each sampling point actual distance S2i may be calculated as the instantaneous vehicle speed or as the number of sampled interval pulses of the roller tachometer.
Modern vehicles are typically equipped with various sensors themselves, which can measure instantaneous or cumulative fuel consumption over a hundred kilometers, or measure instantaneous exhaust emission quality per kilometer, and output values via OBD. The speed of the OBD is calculated according to the theoretical power radius of the wheel running on the road surface after measuring the rotating speed of the wheel, the actual power radius of the wheel is greatly influenced by the air pressure of the wheel and the contact deformation of the wheel and a roller, the difference between the speed of reading the OBD and the actual speed of the roller is larger, the distance error causes larger corresponding detection result error, the actual speed deviates from the specified speed in the detection operation, and the distance error is further increased. A calibration mode is as follows: stabilizing an accelerator pedal to measure a stable average vehicle speed Vg of the roller, reading the stable average vehicle speed Vo corresponding to a sampling point from the OBD to obtain a ratio delta Vg/Vo, wherein the delta is a vehicle speed conversion coefficient, each sampling point Vgi is delta multiplied Voi, converting instantaneous hundred-kilometer fuel consumption or instantaneous exhaust emission quality Qoi detected by the OBD into an instantaneous detection value Qgi of the actual distance of the roller from the vehicle speed, wherein the distance is in direct proportion to the vehicle speed, the distance detection amount is in inverse proportion to the distance and is in inverse proportion to the vehicle speed, and Qgi is Qoi/delta, then, the distance correction is carried out to obtain a corrected value Q1i which is Qgi multiplied by S1i/S2i, or recording the OBD vehicle speed and the drum vehicle speed at the same time, calculating an instantaneous conversion coefficient delta i to convert the instantaneous vehicle speed and the hundred kilometers fuel consumption or the instantaneous exhaust emission quality per kilometer, wherein Qgi is Qoi/delta i, and then correcting the distance to the theoretical distance to obtain a corrected value Q1i which is Qgi multiplied by S1i/S2 i.
The distance correcting method for transient fuel or waste gas in automobile bench test is one method of simulating the transient state in automobile chassis dynamometer to detect the fuel consumption or waste gas exhaust amount of automobile, and features that: detecting the instantaneous fuel consumption from a fuel tester or the instantaneous exhaust emission from an exhaust gas meter or reading the instantaneous detection quantity from an OBD, calculating the theoretical vehicle speed Vli and the theoretical distance S1i of each sampling point according to the theoretical acceleration or deceleration of each acceleration and deceleration working condition, wherein the acceleration of the constant speed working condition is 0, the distance of the idle working condition is 0, detecting the actual distance S2i and the fuel consumption or the exhaust emission Q2i of each sampling point of each working condition, the corrected fuel consumption amount or the corrected exhaust emission amount Q1i is calculated for each sampling point Q2i × S1i/S2i, or when reading instantaneous fuel consumption of hundred kilometres or instantaneous exhaust emission quality per kilometre and vehicle speed from the OBD, firstly, converting the vehicle speed and the instantaneous detection value read by the OBD into an actual distance instantaneous detection value Qgi of the vehicle speed of the roller, and then theoretically distance correcting the actual distance instantaneous detection value of the vehicle speed of the roller at each sampling point to obtain a corrected value Q1i which is Qgi multiplied by S1i/S2 i; the method comprises the steps of calculating an average value by taking all idle fuel consumption or exhaust emission of a vehicle with the speed of 0 under an idle working condition, taking the average value as a correction value of each sampling point of the idle working condition, calculating the fuel consumption per kilometer or the exhaust emission per kilometer by using the correction value Q1i of each sampling point and a theoretical total distance S, correcting according to each sampling point or according to each working condition, and accumulating to obtain the accumulated corrected fuel consumption per kilometer or the accumulated corrected exhaust emission per kilometer of each working condition and a specified transient full working condition.
Detailed Description
Taking 1 second to 28 seconds for detecting oil consumption of one hundred kilometers in 195 seconds as an example of one of four cycles of transient working conditions of a light passenger vehicle urban area, a specific implementation mode of a distance correction method for transient fuel or waste gas of an automobile bench test is described, wherein a theoretical total distance S of 195 seconds is 1013m, and 0 second to 11 seconds are idle working conditions; the acceleration condition is 12 seconds to 15 seconds, and the theoretical acceleration is 1.04167m/s2(ii) a 16-23 seconds are constant speed working conditions, and the theoretical speed is 15 km/h; the deceleration condition is 24 seconds to 25 seconds, and the deceleration is-0.69444 m/s2(ii) a The deceleration condition is that 26 seconds to 28 seconds are used, and the deceleration is-0.92593 m/s2. The sampling interval is 1 second, the oil consumption per second, unit mL, time unit s, vehicle speed unit km/h and distance unit m are detected, the correction is carried out according to each sampling point, and the detection data are shown in Table 1.
TABLE 1
The average fuel consumption of the vehicle speed is 0.208mL when the vehicle speed is equal to 0 from 1 second to 10 seconds under the idling condition, the fuel consumption of each sampling point under the idling condition of 11 seconds is 0.208, the accumulated fuel consumption is 11 multiplied by 0.208 to 2.288mL, the fuel consumption per second Q1i is corrected to Q2i multiplied by S1i/S2i, the fuel consumption per hundred kilometers of each sampling point qi is 100 multiplied by Q1i/1013, the unit L/100km, and the sum of the fuel consumption per hundred kilometers of each sampling point qi under the specified transient condition of 195 seconds is accumulated to obtain the fuel consumption per hundred kilometers at the theoretical distance. The automobile detects the accumulated fuel consumption 108.867mL in 195 seconds and the accumulated distance 1036.4m, the uncorrected fuel consumption per hundred kilometers is 100 multiplied by 108.867/1036.4 to 10.504L/100km, the corrected accumulated fuel consumption per hundred kilometers is 11.246L/100km, or the accumulated corrected fuel consumption is 113.922mL, the corrected fuel consumption per hundred kilometers is 100 multiplied by 113.922/1013 to 11.246.L/100km, and the operation causes the detection error to be (10.504-11.246)/11.246 to be minus 6.6%.
The fuel consumption per kilometer can be calculated by distance correction according to each working condition, the idle working condition is 1-11 seconds, Q2 is 2.298, Q1 is 2.288, and the fuel consumption per kilometer is 100 multiplied by 2.288/1013 is 0.22586L/100 km. The acceleration condition is 12 seconds to 15 seconds, S1 is 8.333, S2 is 7.393, Q2 is 2.401, Q1 is 2.401 × 8.333/7.393 is 2.706, and the fuel consumption per kilometer is 100 × 2.706/1013 is 0.26713L/100 km. The constant speed is set from 16 seconds to 23 seconds, S1 is 33.333, S2 is 33.423, Q2 is 5.347, Q1 is 5.347 × 33.333/33.423 is 5.333, and the fuel consumption per kilometer is 100 × 5.333/1013 is 0.52646L/100 km. The deceleration condition is 24 seconds to 28 seconds, S1 is 11.111, S2 is 15.56, Q2 is 1.935, Q1 is 1.935 multiplied by 11.111/15.56 is 1.382, and the fuel consumption per kilometer is 100 multiplied by 1.382/1013 is 0.136426mL/100 km. And the calculation according to each working condition is favorable for comparative analysis.
The correction method can be used for detecting the oil consumption of the road transport vehicle in the hundred kilometers under the road test transient working condition or the road test at the constant speed of 50km/h or 60km/h, and the correction method can be used for detecting the oil consumption of the heavy commercial vehicle in the hundred kilometers under the road test of 1800 second transient cycle C-WTVVC.
The distance correction method for the transient fuel or waste gas of the automobile bench test can reduce the influence of operation on the detection result, and has the advantages of good accuracy, convenience in correction and the like.
Claims (1)
1. The distance correcting method for transient fuel or waste gas in automobile bench test is one method of simulating the transient state in automobile chassis dynamometer to detect the fuel consumption or waste gas exhaust amount of automobile, and features that: detecting the instantaneous fuel consumption from a fuel tester or the instantaneous exhaust emission from an exhaust gas meter or the instantaneous detection quantity from an OBD, calculating the theoretical vehicle speed V1i and the theoretical distance S1i of each sampling point according to the theoretical acceleration or deceleration of each acceleration and deceleration working condition, the acceleration of the constant speed working condition is 0, the distance of the idle working condition is 0, detecting the actual distance S2i and the fuel consumption or the exhaust emission Q2i of each sampling point of each working condition, the corrected fuel consumption amount or the corrected exhaust emission amount Q1i is calculated for each sampling point Q2i × S1i/S2i, or when reading instantaneous fuel consumption of hundred kilometres or instantaneous exhaust emission quality per kilometre and vehicle speed from the OBD, firstly, converting the vehicle speed and the instantaneous detection value read by the OBD into an actual distance instantaneous detection value Qgi of the vehicle speed of the roller, and then theoretically distance correcting the actual distance instantaneous detection value of the vehicle speed of the roller at each sampling point to obtain a corrected value Q1i which is Qgi multiplied by S1i/S2 i; the method comprises the steps of calculating an average value by taking all idle fuel consumption or exhaust emission of a vehicle with the speed of 0 under an idle working condition, taking the average value as a correction value of each sampling point of the idle working condition, calculating the fuel consumption per kilometer or the exhaust emission per kilometer by using the correction value Q1i of each sampling point and a theoretical total distance S, correcting according to each sampling point or according to each working condition, and accumulating to obtain the accumulated corrected fuel consumption per kilometer or the accumulated corrected exhaust emission per kilometer of each working condition and a specified transient full working condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298844.8A CN110987473B (en) | 2019-12-06 | 2019-12-06 | Distance correction method for transient fuel or waste gas of automobile bench test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911298844.8A CN110987473B (en) | 2019-12-06 | 2019-12-06 | Distance correction method for transient fuel or waste gas of automobile bench test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110987473A true CN110987473A (en) | 2020-04-10 |
| CN110987473B CN110987473B (en) | 2021-04-20 |
Family
ID=70094426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911298844.8A Active CN110987473B (en) | 2019-12-06 | 2019-12-06 | Distance correction method for transient fuel or waste gas of automobile bench test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110987473B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598523A (en) * | 2004-08-28 | 2005-03-23 | 吴明 | System testing method of multiple working condition loading of vehicle table amalog road test |
| CN101000278A (en) * | 2007-01-12 | 2007-07-18 | 武汉四方光电科技有限公司 | Method and device for measuring pollutant discharging total of motor vehicle |
| CN203587155U (en) * | 2013-12-16 | 2014-05-07 | 中国汽车技术研究中心 | Gas car gas consumption test system for vehicle road test |
| US20140200793A1 (en) * | 2013-01-16 | 2014-07-17 | Toyota Motor Engineering & Manufacturing North America, Inc. | System and method for determining and displaying a fuel-equivalent distance-per-energy consumption rate |
| CN104198005A (en) * | 2014-07-19 | 2014-12-10 | 吴明 | Method for analog computation and detection of road test fuel consumption of vehicle in multiple working conditions |
| CN108361139A (en) * | 2018-01-29 | 2018-08-03 | 中国第汽车股份有限公司 | The small fuel-flow control method of fuel injector |
| CN208736504U (en) * | 2018-05-31 | 2019-04-12 | 北京胜风合力系统技术有限公司 | The test integrated device of fuel consumption |
-
2019
- 2019-12-06 CN CN201911298844.8A patent/CN110987473B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1598523A (en) * | 2004-08-28 | 2005-03-23 | 吴明 | System testing method of multiple working condition loading of vehicle table amalog road test |
| CN101000278A (en) * | 2007-01-12 | 2007-07-18 | 武汉四方光电科技有限公司 | Method and device for measuring pollutant discharging total of motor vehicle |
| US20140200793A1 (en) * | 2013-01-16 | 2014-07-17 | Toyota Motor Engineering & Manufacturing North America, Inc. | System and method for determining and displaying a fuel-equivalent distance-per-energy consumption rate |
| CN203587155U (en) * | 2013-12-16 | 2014-05-07 | 中国汽车技术研究中心 | Gas car gas consumption test system for vehicle road test |
| CN104198005A (en) * | 2014-07-19 | 2014-12-10 | 吴明 | Method for analog computation and detection of road test fuel consumption of vehicle in multiple working conditions |
| CN108361139A (en) * | 2018-01-29 | 2018-08-03 | 中国第汽车股份有限公司 | The small fuel-flow control method of fuel injector |
| CN208736504U (en) * | 2018-05-31 | 2019-04-12 | 北京胜风合力系统技术有限公司 | The test integrated device of fuel consumption |
Non-Patent Citations (1)
| Title |
|---|
| 王爱红: "大型客车柴油和HCNG燃料的WTW分析", 《汽车工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110987473B (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11226289B2 (en) | Remote sensing-based detection system and method for gaseous pollutant from diesel vehicle exhaust | |
| CN108515984B (en) | Wheel damage detection method and device | |
| CN108871788B (en) | A kind of method of calibration of automatic transmission shift attribute test rack | |
| CN103115651B (en) | Method for detecting fuel consumption of vehicle in transient road-test standard state | |
| CN101008588A (en) | Device and method for measuring total amount of pollutants from motor vehicles and consumption of fuel | |
| CN108437998B (en) | Pure electric automobile gradient recognition methods based on longitudinal dynamics | |
| CN110702427B (en) | Method for detecting resistance of automobile running sliding system with gear | |
| CN110470354B (en) | Method for testing fuel consumption of motor vehicle under user-defined working condition | |
| CN108287076B (en) | Resistance curve testing method and device | |
| CN103398849B (en) | The idling scaling method of the speed of a motor vehicle and engine speed relationship | |
| CN113607251B (en) | Vehicle load measuring method and device | |
| CN108763643A (en) | A kind of novel regional Discharging Factor of Vehicles computational methods | |
| CN110827444B (en) | Heavy vehicle emission factor obtaining method suitable for OBD remote emission monitoring data | |
| CN104089666A (en) | Analog computation and detection method for vehicle fuel consumption per hundred kilometers at constant speed | |
| CN110987473B (en) | Distance correction method for transient fuel or waste gas of automobile bench test | |
| CN114936343A (en) | Dynamic calculation method and device for electric vehicle mass | |
| CN105157991B (en) | Wheel drive surfaces output regulation power loading detection method | |
| CN114019113A (en) | Motor vehicle exhaust dynamic monitoring method and device based on multimode data correction | |
| CN101963519B (en) | Road test-simulated standard-state fuel consumption detection method based on bench test | |
| CN103076059B (en) | Vehicle constant speed road test standard state fuel consumption amount correction method | |
| CN111664906A (en) | Method for determining oil consumption of medium and light truck | |
| CN112197828A (en) | Method for testing fuel consumption of light automobile during constant-speed running | |
| CN112051065A (en) | Engine brake system testing method | |
| CN111610037A (en) | New energy rear axle abutment noise testing method | |
| CN201025461Y (en) | A measurement device for motor pollutant discharge volume and fuel consumption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |