CN113190996B - Oil consumption evaluation method for timely four-wheel drive vehicle type - Google Patents
Oil consumption evaluation method for timely four-wheel drive vehicle type Download PDFInfo
- Publication number
- CN113190996B CN113190996B CN202110468783.6A CN202110468783A CN113190996B CN 113190996 B CN113190996 B CN 113190996B CN 202110468783 A CN202110468783 A CN 202110468783A CN 113190996 B CN113190996 B CN 113190996B
- Authority
- CN
- China
- Prior art keywords
- wheel drive
- timely
- wheel
- torque distribution
- whole vehicle
- 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.)
- Active
Links
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- 238000009826 distribution Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000000446 fuel Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004088 simulation Methods 0.000 claims abstract description 16
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 8
- 238000012502 risk assessment Methods 0.000 abstract description 5
- 238000011217 control strategy Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
The invention discloses a fuel consumption evaluation method for a timely four-wheel drive vehicle type, which is used for respectively testing the sliding resistance of the timely four-wheel drive vehicle and the two-wheel drive vehicle to obtain the dragging force of four-wheel drive components; performing a fuel consumption test of NEDC circulation working conditions on the timely four-wheel drive vehicle to obtain wheel rim force and whole vehicle test data, and calculating to obtain torque distribution coefficients of front and rear axles when four-wheel drive is combined; combing the combination/disconnection strategy of the four-wheel drive mode according to the torque distribution coefficients of the front shaft and the rear shaft during the four-wheel drive combination to obtain the combination/disconnection strategy which changes with time; and adding the dragging force of the four-wheel drive component and the torque distribution coefficients of the front shaft and the rear shaft into a one-dimensional whole vehicle simulation model, and operating the one-dimensional whole vehicle simulation model to complete the oil consumption evaluation of the timely four-wheel drive vehicle type. The invention discloses a fuel consumption evaluation method for timely four-wheel-drive vehicle types, which solves the problem that the four-wheel-drive vehicle types in the prior art cannot be subjected to fuel consumption risk analysis in the development process.
Description
Technical Field
The invention belongs to the technical field of automobile manufacturing, and particularly relates to a fuel consumption evaluation method for timely four-wheel drive automobile types.
Background
With the rapid development of the automobile market, users are increasingly demanding four-wheel drive types that are excellent in passability and drivability. The fuel consumption of the whole vehicle is an important index for evaluating the economy of the whole vehicle, and national regulations have limit value regulations on the fuel consumption of the whole vehicle, and if the fuel consumption exceeds the limit value, the fuel consumption of the whole vehicle cannot enter the market for sale. In the timely four-wheel drive development process, parameters of four-wheel drive components and related control strategies are required to be used as input parameters for risk assessment of the overall fuel consumption. However, from the technical protection aspect, a research and development unit of the four-wheel drive component and a whole vehicle factory using the product cannot disclose all parameters and control strategies of the four-wheel drive component at the right moment, and the parameters and the control strategies are difficult to measure on a rack. The specific timely four-wheel oil displacement consumption simulation model cannot be built in the development process of the existing timely four-wheel drive vehicle type, and oil consumption risk analysis cannot be performed. The development process of the timely four-wheel drive vehicle type has unpredictable risks.
Therefore, an economic and effective analysis method for timely four-wheel drive type oil consumption is needed, and oil consumption risk analysis can be more accurately carried out in the development process of timely four-wheel drive type oil consumption.
Disclosure of Invention
The invention aims to provide a fuel consumption evaluation method for timely four-wheel-drive vehicle types, which solves the problem that the four-wheel-drive vehicle types in the prior art cannot be subjected to fuel consumption risk analysis in the development process.
The technical scheme adopted by the invention is a fuel consumption evaluation method for timely four-wheel drive vehicle types, which is implemented according to the following steps:
step 1, respectively testing the sliding resistance of the whole vehicle for the timely four-wheel drive whole vehicle and the two-wheel drive whole vehicle to obtain the dragging force of the four-wheel drive component;
step 2, performing a fuel consumption test of NEDC circulation working conditions on the timely four-wheel drive vehicle to obtain wheel rim force and whole vehicle test data, and calculating to obtain torque distribution coefficients of front and rear axles when four-wheel drive is combined;
step 3, combing the combination/disconnection strategy of the four-wheel drive mode according to the torque distribution coefficients of the front shaft and the rear shaft during four-wheel drive combination to obtain the combination/disconnection strategy changing along with time;
and 4, adding the dragging force of the four-wheel drive component and the torque distribution coefficients of the front shaft and the rear shaft into a one-dimensional whole vehicle simulation model, and operating the one-dimensional whole vehicle simulation model to complete the oil consumption evaluation of the timely four-wheel drive vehicle type.
The invention is also characterized in that:
in step 2, the vehicle test data includes a vehicle speed signal, an accelerator signal, an engine speed signal, an engine torque signal, a front axle wheel Bian Li signal, a rear axle wheel side force signal and a vehicle running resistance.
The torque distribution coefficient of the front and rear axles at the time of four-wheel drive combination is obtained by a rear axle torque distribution coefficient/a front axle torque distribution coefficient, and the rear axle torque distribution coefficient is obtained by a rear axle torque/an output torque of the engine obtained by calculation of a rear axle rim force.
In step 3, the time-varying on/off strategy is specifically: if the front and rear axle torque distribution coefficient is not more than 0 when the four drives are combined, the four-drive mode is disconnected; if the front and rear axle torque distribution coefficient is greater than 0 when four-wheel drive is combined, the four-wheel drive mode is combined.
In the step 4, if the four-wheel drive mode is in a combined state, transmitting signals of the front and rear axle torque distribution coefficients to a middle differential mechanism, and distributing engine torque by the middle differential mechanism according to the signals; if the four-wheel drive mode is in an off state, the dragging force of the four-wheel drive component is transmitted to the front axle, and the running resistance of the whole vehicle is increased.
The NEDC circulation working condition is specifically as follows: GB18352.5-2013 light automobile pollutant emission limit and standard working conditions specified by a measuring method.
The beneficial effects of the invention are as follows:
the oil consumption evaluation method for the timely four-wheel drive vehicle type can build the timely four-wheel drive vehicle type oil consumption simulation model, correct the standard in the test process, lock the specific problem in the test and finish the accurate analysis of the oil consumption risk; according to the oil consumption evaluation method for the timely four-wheel drive vehicle type, the whole vehicle sliding resistance test and the NEDC circulation working condition oil consumption test are all necessary tests in the whole vehicle development process, the test requirements are standardized and flow-processed, and the test process is simple to operate and high in realizability; according to the oil consumption evaluation method for the timely four-wheel drive vehicle type, parameters and control strategies of the four-wheel drive components are obtained through reverse analysis and deduction of test data, comparison is performed in a one-dimensional whole vehicle simulation model through the economical performance of the whole vehicle, and the test is basically equivalent to the actual measured oil consumption of the whole vehicle, so that the accuracy is high; the method for estimating the oil consumption of the timely four-wheel drive vehicle type is high in popularization, theoretically suitable for reverse extraction of the four-wheel drive control strategies of different driving modes, and supports construction of analysis models of different four-wheel drive modes.
Drawings
FIG. 1 is a flow chart of a fuel consumption evaluation method for a timely four-wheel drive vehicle model of the present invention;
FIG. 2 is a graph comparing the sliding resistance curves of a timely four-wheel drive vehicle model and a two-wheel drive vehicle model;
FIG. 3 is a wheel side force plot of the front and rear axles for NEDC cycle conditions;
FIG. 4 is a graph of the front and rear axle torque split coefficients for NEDC cycling conditions.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention provides a fuel consumption evaluation method for timely four-wheel drive vehicle types, which is implemented according to the following steps as shown in fig. 1:
step 1, respectively testing the sliding resistance of the whole vehicle for the timely four-wheel drive whole vehicle and the two-wheel drive whole vehicle to obtain the dragging force of the four-wheel drive component;
step 2, performing a fuel consumption test of NEDC circulation working conditions on the timely four-wheel drive vehicle to obtain wheel rim force and whole vehicle test data, and calculating to obtain torque distribution coefficients of front and rear axles when four-wheel drive is combined;
wherein, NEDC circulation operating mode specifically is: standard working conditions specified by GB18352.5-2013 light automobile pollutant emission limits and measuring methods; the working condition operation cycle consists of an urban operation cycle and an suburban operation cycle; the operating condition operation test requirements comprise: time, vehicle speed, acceleration, driver operation time, etc.;
the whole vehicle test data comprise a whole vehicle speed signal, an accelerator signal, an engine rotating speed signal, an engine torque signal, a front axle wheel Bian Li signal, a rear axle wheel side force signal and whole vehicle running resistance;
the torque distribution coefficient of the front axle and the rear axle is obtained by a rear axle torque distribution coefficient/a front axle torque distribution coefficient when four-wheel drive is combined, and the rear axle torque distribution coefficient is obtained by a rear axle torque/an output torque of an engine obtained by calculating the wheel rim force of the rear axle; front axle torque split coefficient=1-rear axle torque split coefficient;
step 3, combing the combination/disconnection strategy of the four-wheel drive mode according to the torque distribution coefficients of the front shaft and the rear shaft during four-wheel drive combination to obtain the combination/disconnection strategy changing along with time;
the time-varying on/off strategy is specifically: if the front and rear axle torque distribution coefficient is not more than 0 when the four drives are combined, the four-drive mode is disconnected; if the front and rear axle torque distribution coefficient is greater than 0 during the four-wheel drive combination, the four-wheel drive mode is combined;
step 4, adding the dragging force of the four-wheel drive component and the torque distribution coefficients of the front shaft and the rear shaft into a one-dimensional whole vehicle simulation model, and operating the one-dimensional whole vehicle simulation model to finish the oil consumption evaluation of the timely four-wheel drive vehicle type;
if the four-wheel drive mode is in a combined state, transmitting signals of the front and rear axle torque distribution coefficients to a middle differential mechanism, and distributing engine torque by the middle differential mechanism according to the signals; if the four-wheel drive mode is in an off state, the dragging force of the four-wheel drive component is transmitted to the front axle, and the running resistance of the whole vehicle is increased.
Examples
The method comprises the steps that a timely four-wheel drive version vehicle type and two-wheel drive version vehicle type are subjected to whole vehicle sliding resistance testing on the same environmental road surface, CAN line signals are collected in the vehicle by a VBOX data collector, two groups of whole vehicle sliding resistance data which change along with the vehicle speed are extracted, and the loading resistance of the four-wheel drive and the two-wheel drive is assumed to be the same as that of the two-wheel drive version vehicle type, as shown in fig. 2;
calculating two sets of whole vehicle resistance data in fig. 2 to obtain the dragging force of the four-wheel drive component according to the dragging force of the four-wheel drive component = the sliding resistance of the four-wheel drive-the sliding resistance of the two-wheel drive- (the rolling resistance of the four-wheel drive-the rolling resistance of the two-wheel drive);
the timely four-wheel drive vehicle type to be tested performs NEDC circulation working condition oil consumption test on the rotating hub, and extracts wheel side force data of the front axle and the rear axle, as shown in figure 3; as can be seen from fig. 3, when the four-wheel drive mode is combined, i.e. the operation mode is the four-wheel drive state, the rear axle has driving force; on the contrary, when the four-wheel drive mode is not combined and the vehicle running mode is a two-wheel drive state, the rear axle has no driving force. According to the rear axle rim force in the test, it can be seen that when the rear axle rim force is greater than 0, the rear axle has driving force, and the vehicle is in a four-wheel drive state at this time. Therefore, the four-wheel drive combination state can be judged according to whether the wheel rim force of the rear axle is larger than zero.
Converting the wheel rim force of the rear axle into rear axle torque, and calculating the front axle torque distribution coefficient and the rear axle torque distribution coefficient according to the engine output torque and the rear axle torque;
loading the obtained four-wheel drive component dragging force and front and rear axle torque distribution coefficients into a one-dimensional whole vehicle simulation model according to a four-wheel drive combination strategy, as shown in fig. 4;
and running the built one-dimensional timely four-wheel drive complete vehicle oil consumption simulation model, and calculating to obtain an economic simulation result of the NEDC circulation working condition.
The oil consumption test result of the NEDC circulation working condition of the to-be-tested timely four-wheel drive vehicle type in the hub test room is extracted, the oil consumption test result is compared with the simulation value of the NEDC circulation working condition of the whole vehicle, the error value is within 3%, and the method is verified to be practical and feasible, high in accuracy and strong in feasibility.
When the timely four-wheel drive oil consumption simulation model is built, the working characteristics of the timely four-wheel drive structure are considered, and the timely four-wheel drive structure has two operation modes: a two-drive mode and a four-drive mode;
1) Two-drive mode: in this state, the rear axle clutch is disconnected, drag force of the four-wheel drive structure increases resistance to be overcome by the whole vehicle in time, and drag force of the four-wheel drive structure is required to be loaded to the driving axle when a model is built.
2) Four-wheel drive mode: in this state, the rear axle clutch is engaged, and torque distribution is performed according to the derived front and rear axle torque distribution coefficients.
Claims (4)
1. The oil consumption evaluation method for the timely four-wheel drive vehicle type is characterized by comprising the following steps of:
step 1, respectively testing the sliding resistance of the whole vehicle for the timely four-wheel drive whole vehicle and the two-wheel drive whole vehicle to obtain the dragging force of the four-wheel drive component;
step 2, performing a fuel consumption test of NEDC circulation working conditions on the timely four-wheel drive vehicle to obtain wheel rim force and whole vehicle test data, and calculating to obtain torque distribution coefficients of front and rear axles when four-wheel drive is combined;
in the step 2, the whole vehicle test data comprise a whole vehicle speed signal, an accelerator signal, an engine rotating speed signal, an engine torque signal, a front axle wheel Bian Li signal, a rear axle wheel side force signal and whole vehicle running resistance;
step 3, combing the combination/disconnection strategy of the four-wheel drive mode according to the torque distribution coefficients of the front shaft and the rear shaft during four-wheel drive combination to obtain the combination/disconnection strategy changing along with time;
in step 3, the time-varying on/off strategy specifically includes: if the front and rear axle torque distribution coefficient is not more than 0 when the four drives are combined, the four-drive mode is disconnected; if the front and rear axle torque distribution coefficient is greater than 0 during the four-wheel drive combination, the four-wheel drive mode is combined;
and 4, adding the dragging force of the four-wheel drive component and the torque distribution coefficients of the front shaft and the rear shaft into a one-dimensional whole vehicle simulation model, and running the one-dimensional whole vehicle simulation model to complete the oil consumption evaluation of the timely four-wheel drive vehicle type.
2. The fuel consumption evaluation method for a timely four-wheel drive vehicle according to claim 1, wherein the torque distribution coefficient of the front and rear axles at the time of four-wheel drive combination is obtained from a rear axle torque distribution coefficient/a front axle torque distribution coefficient, and the rear axle torque distribution coefficient is obtained from a rear axle torque/an output torque of the engine obtained by calculation of a rear axle wheel rim force.
3. The method for estimating fuel consumption of a timely four-wheel drive vehicle according to claim 1, wherein in the step 4, if the four-wheel drive mode is in a combined state, a signal of the front and rear axle torque distribution coefficient is transmitted to a middle differential, and the middle differential distributes engine torque according to the signal; if the four-wheel drive mode is in an off state, the dragging force of the four-wheel drive component is transmitted to the front axle, and the running resistance of the whole vehicle is increased.
4. The fuel consumption evaluation method for timely four-wheel-drive vehicle type according to claim 1, wherein the NEDC cycle conditions are specifically as follows: GB18352.5-2013 light automobile pollutant emission limit and standard working conditions specified by a measuring method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110468783.6A CN113190996B (en) | 2021-04-28 | 2021-04-28 | Oil consumption evaluation method for timely four-wheel drive vehicle type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110468783.6A CN113190996B (en) | 2021-04-28 | 2021-04-28 | Oil consumption evaluation method for timely four-wheel drive vehicle type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113190996A CN113190996A (en) | 2021-07-30 |
| CN113190996B true CN113190996B (en) | 2024-03-29 |
Family
ID=76980189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110468783.6A Active CN113190996B (en) | 2021-04-28 | 2021-04-28 | Oil consumption evaluation method for timely four-wheel drive vehicle type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113190996B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114739554B (en) * | 2022-04-02 | 2024-02-02 | 中国第一汽车股份有限公司 | Test experiment method and evaluation method for torsional strength of four-wheel drive train |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139275A1 (en) * | 2009-06-03 | 2010-12-09 | 芜湖普威技研有限公司 | Driving system for four-wheel driving hybrid vehicle and driving management method thereof |
| CN107330217A (en) * | 2017-07-13 | 2017-11-07 | 北京市交通信息中心 | A kind of middle sight oil consumption Forecasting Methodology based on RBFNN |
| CN108168752A (en) * | 2017-11-13 | 2018-06-15 | 中汽研（天津）汽车工程研究院有限公司 | A kind of passenger car vehicle resistance of taxing decomposition test method |
| CN108357494A (en) * | 2018-02-11 | 2018-08-03 | 重庆长安汽车股份有限公司 | A kind of automatically controlled in due course 4 wheel driven control method |
| CN108692948A (en) * | 2017-04-07 | 2018-10-23 | 上汽通用汽车有限公司 | Vehicle oil consumption tests system and control method |
| CN108919134A (en) * | 2018-07-27 | 2018-11-30 | 安徽江淮汽车集团股份有限公司 | battery cell power evaluation method and system |
| KR20190135215A (en) * | 2018-05-28 | 2019-12-06 | 대우조선해양 주식회사 | System and method for calculating eeoi and computer-readable recording medium thereof |
| CN111625945A (en) * | 2020-05-15 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for evaluating motor control system and storage medium |
| CN111664906A (en) * | 2020-05-07 | 2020-09-15 | 东风汽车股份有限公司 | Method for determining oil consumption of medium and light truck |
| CN111879526A (en) * | 2020-07-30 | 2020-11-03 | 东风汽车集团有限公司 | Method and system for evaluating oil consumption of automobile cooler |
-
2021
- 2021-04-28 CN CN202110468783.6A patent/CN113190996B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010139275A1 (en) * | 2009-06-03 | 2010-12-09 | 芜湖普威技研有限公司 | Driving system for four-wheel driving hybrid vehicle and driving management method thereof |
| CN108692948A (en) * | 2017-04-07 | 2018-10-23 | 上汽通用汽车有限公司 | Vehicle oil consumption tests system and control method |
| CN107330217A (en) * | 2017-07-13 | 2017-11-07 | 北京市交通信息中心 | A kind of middle sight oil consumption Forecasting Methodology based on RBFNN |
| CN108168752A (en) * | 2017-11-13 | 2018-06-15 | 中汽研（天津）汽车工程研究院有限公司 | A kind of passenger car vehicle resistance of taxing decomposition test method |
| CN108357494A (en) * | 2018-02-11 | 2018-08-03 | 重庆长安汽车股份有限公司 | A kind of automatically controlled in due course 4 wheel driven control method |
| KR20190135215A (en) * | 2018-05-28 | 2019-12-06 | 대우조선해양 주식회사 | System and method for calculating eeoi and computer-readable recording medium thereof |
| CN108919134A (en) * | 2018-07-27 | 2018-11-30 | 安徽江淮汽车集团股份有限公司 | battery cell power evaluation method and system |
| CN111664906A (en) * | 2020-05-07 | 2020-09-15 | 东风汽车股份有限公司 | Method for determining oil consumption of medium and light truck |
| CN111625945A (en) * | 2020-05-15 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for evaluating motor control system and storage medium |
| CN111879526A (en) * | 2020-07-30 | 2020-11-03 | 东风汽车集团有限公司 | Method and system for evaluating oil consumption of automobile cooler |
Non-Patent Citations (3)
| Title |
|---|
| Vehicle Fuel Consumption Prediction Method Based on Driving Behavior Data Collected from Smartphones;Yao Ying et al.;《Journal of Advanced Transportation》;第2020卷(第2020期);1-11 * |
| 前置前驱车型传动系阻力的分析与优化;莫易敏;向科鹏;姚亮;陈龙龙;高勇;;机械传动(第04期);153-156 * |
| 四轮驱动混合动力汽车能量管理策略仿真;马东兵;朱福堂;顾力强;;传动技术(第03期);14-19、39 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113190996A (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108168752B (en) | Decomposition test method for sliding resistance of whole passenger vehicle | |
| CN103308325B (en) | Drive system of electric automobile semi-physical emulation platform | |
| CN108871788B (en) | A kind of method of calibration of automatic transmission shift attribute test rack | |
| CN102506160B (en) | Ramp based on longitudinal dynamics and vehicle load identification method | |
| CN103983460B (en) | A kind of vehicle inner walkway method | |
| CN100405037C (en) | Statistical method of system resistance based on road test and bench test about car in free running at neutral position | |
| CN103557976B (en) | A kind of measuring method of automobile running resistance | |
| CN102305715A (en) | Dynamic load simulating device and method for automobile power system test | |
| CN103728133A (en) | Method for testing automotive transmission system resistance distribution | |
| CN108982122B (en) | Method and device for evaluating influence of dragging torque on energy consumption of automobile | |
| CN109580251A (en) | A kind of rear axle Efficiency test method based on NEDC oil consumption operating condition | |
| CN113190996B (en) | Oil consumption evaluation method for timely four-wheel drive vehicle type | |
| CN103134683B (en) | The system and method for vehicle motor exhaust brake test is carried out in indoor | |
| CN109946005B (en) | Method, device and system for power detection | |
| CN110220535A (en) | Vehicle instrument table test method, device, system, equipment and storage medium | |
| CN114662954A (en) | Vehicle performance evaluation system | |
| CN112765727A (en) | Light truck driving load endurance test strengthening coefficient calculation method | |
| CN115855529A (en) | Heat management test method and system based on chassis dynamometer and environmental bin | |
| CN109900399A (en) | A kind of wheel side/hub drive system test platform | |
| CN100419402C (en) | Dynamometer system for motorcar chassis | |
| de Menezes Lourenço et al. | Uncertainty analysis of vehicle fuel consumption in twin-roller chassis dynamometer experiments and simulation models | |
| Li et al. | [Retracted] The Development of Data Acquisition System of Formula SAE Race Car Based on CAN Bus Communication Interface and Closed‐Loop Design of Racing Car | |
| CN109342078B (en) | Economical efficiency testing method, device and testing device for electric four-wheel drive vehicle | |
| CN102346100A (en) | Method and device for judging preheating state of vehicle | |
| CN111665060A (en) | Test object testing device, test object testing method, and storage medium |
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 |