Application of shortening time test in battery electric range calculation of PEV based on CLTC-P

In order to obtain the actual results of battery electric range test, and meet the demand of fiscal subsidy policy introduction of new energy vehicles, some modifications of the standard GB/T 18386.1 Test Method for Energy Consumption and Range of Electric Vehicles- part1: Light-duty Vehicles are revised by drafting group. Such as China Light-duty vehicle Test Cycle for passenger car (CLTC-P), Shortened time test method, etc. To prove the reasonability of Shortened time test to measure battery electric range (BER) based on CLTC-P, two sets of vehicle tests were carried out. Results show that shortened time test greatly reduce test time, and the weighting factor setting of DS1 and DS2 is reasonable. Although some deviation between Shortened time test and consecutive cycle test exist, but not regularly. It is related to the vehicle energy regulation strategy individually. Finally, it is recommended that the test vehicle should be forced to break 10 minutes after the end of CSSM.

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Measurement and Evaluation of Real-World Speed and Acceleration Activity Envelopes for Light-Duty Vehicles

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2503-14 ◽

2015 ◽

Vol 2503 (1) ◽

pp. 128-136 ◽

Cited By ~ 8

Author(s):

Bin Liu ◽

H. Christopher Frey

Keyword(s):

Real World ◽

Test Procedure ◽

Accurate Estimation ◽

Vehicle Type ◽

Light Duty ◽

Road Grade ◽

Light Duty Vehicle ◽

Curb Weight ◽

Vehicle Activity ◽

Light Duty Vehicles

Accurate estimation of vehicle activity is critically important for the accurate estimation of emissions. To provide a benchmark for estimation of vehicle speed trajectories such as those from traffic simulation models, this paper demonstrates a method for quantifying light-duty vehicle activity envelopes based on real-world activity data for 100 light-duty vehicles, including conventional passenger cars, passenger trucks, and hybrid electric vehicles. The vehicle activity envelope was quanti-fied in the 95% frequency range of acceleration for each of 15 speed bins with intervals of 5 mph and a speed bin for greater than 75 mph. Potential factors affecting the activity envelope were evaluated; these factors included vehicle type, transmission type, road grade, engine displacement, engine horsepower, curb weight, and ratio of horsepower to curb weight. The activity envelope was wider for speeds ranging from 5 to 20 mph and narrowed as speed increased. The latter was consistent with a constraint on maximum achievable engine power demand. The envelope was weakly sensitive to factors such as type of vehicle, type of transmission, road grade, and engine horsepower. The effect of road grade on cycle average emissions rates was evaluated for selected real-word cycles. The measured activity envelope was compared with those of dynamometer driving cycles, such as the federal test procedure, highway fuel economy test, SC03, and US06 cycles. The effect of intervehicle variability on the activity envelope was minor; this factor implied that the envelope could be quantified based on a smaller vehicle sample than used for this study.

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Intercomparison of real-time tailpipe ammonia measurements from vehicles tested over the new world-harmonized light-duty vehicle test cycle (WLTC)

Environmental Science and Pollution Research ◽

10.1007/s11356-015-4267-3 ◽

2015 ◽

Vol 22 (10) ◽

pp. 7450-7460 ◽

Cited By ~ 33

Author(s):

Ricardo Suarez-Bertoa ◽

Alessandro A. Zardini ◽

Velizara Lilova ◽

Daniel Meyer ◽

Shigeru Nakatani ◽

...

Keyword(s):

Real Time ◽

New World ◽

Test Cycle ◽

Light Duty ◽

Light Duty Vehicle ◽

Vehicle Test

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Analysis of the influence of RDE test data processing methods on the emission results of China 6 light duty vehicles

E3S Web of Conferences ◽

10.1051/e3sconf/202126801022 ◽

2021 ◽

Vol 268 ◽

pp. 01022

Author(s):

Zhihong Wang ◽

Penghui Wu ◽

Nenghui Yu ◽

Yuanjun Zhang ◽

Zhijun Wang

Keyword(s):

Data Processing ◽

Test Data ◽

Emission Factor ◽

Vehicle Emission ◽

Emission Data ◽

Processing Methods ◽

Light Duty ◽

Light Duty Vehicle ◽

Light Duty Vehicles ◽

Data Processing Methods

The CO2 moving average window(MAW) method is used to process RDE (real drive emissions) emissions data in China 6 light duty vehicle emissions regulations, while the Euro 6 light duty vehicle emission regulations allow to use both of MAW and power binning(PB) method to deal with RDE emission data. In order to study the difference between the two data processing methods and analyze the differences in the emission results, 10 different types of light duty vehicles are conducted RDE test with PEMS (portable emissions measurement system), and the test data are processed by the two methods separately. The results show that there is a little difference between MAW and PB, while both of them can satisfy the vehicle emission assessment. The PB method calculates the emission factors higher than the MAW method. After removing the cold start and idle condition data, the results of PB is similar to MAW. Besides, reducing the average speed limit of urban working conditions in PB has a greater impact on the urban driving condition emission factor, but less on the whole cycle emission factor.

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Influence of Test Cycles on Energy Consumption Test of Electric Vehicles

E3S Web of Conferences ◽

10.1051/e3sconf/202124102004 ◽

2021 ◽

Vol 241 ◽

pp. 02004

Author(s):

Yu Liu ◽

Kunqi Ma ◽

Hanzhengnan Yu ◽

Jingyuan Li ◽

Xiaopan An

Keyword(s):

Energy Consumption ◽

Electric Vehicles ◽

Energy Demand ◽

Test Results ◽

Test Cycle ◽

Light Duty ◽

Actual Use ◽

Light Duty Vehicle ◽

Simulation Results ◽

Vehicle Test

In order to verify the necessity of the application of China Automotive Test Cycle which is constructed through actual driving data in china of more than 55 million kilometers in the energy consumption test of electric vehicles in China, this paper compares the characteristics of New European Test Cycle (NEDC), World-wide harmonized Light duty Test Cycle (WLTC) and China light-duty vehicle test cycle for passenger car(CLTC-P), and analyzes the differences of vehicle energy demand under different test cycles from theoretical and simulation point, simulation results show that the endurance mileage is longest and the energy recovery strategy is more effective under CLTC-P cycle. Finally, four types of vehicles are selected to carry out the endurance mileage test under these three test cycles. The test results are consistent with the simulation results. Therefore, in order to make the test results of electric vehicle energy consumption closer to the actual use of our country, CLTC-P should be selected to replace NEDC and WLTC cycle.

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Estimation of Real-World Fuel Consumption Rate of Light-Duty Vehicles Based on the Records Reported by Vehicle Owners

Energies ◽

10.3390/en14237915 ◽

2021 ◽

Vol 14 (23) ◽

pp. 7915

Author(s):

Isabella Yunfei Zeng ◽

Shiqi Tan ◽

Jianliang Xiong ◽

Xuesong Ding ◽

Yawen Li ◽

...

Keyword(s):

Fuel Consumption ◽

Real World ◽

Consumption Rate ◽

The Real ◽

Fuel Consumption Rate ◽

Light Gradient ◽

Light Duty ◽

Light Duty Vehicle ◽

Light Duty Vehicles ◽

Engine Power

Private vehicle travel is the most basic mode of transportation, so that an effective way to control the real-world fuel consumption rate of light-duty vehicles plays a vital role in promoting sustainable economic growth as well as achieving a green low-carbon society. Therefore, the factors impacting individual carbon emissions must be elucidated. This study builds five different models to estimate the real-world fuel consumption rate of light-duty vehicles in China. The results reveal that the light gradient boosting machine (LightGBM) model performs better than the linear regression, naïve Bayes regression, neural network regression, and decision tree regression models, with a mean absolute error of 0.911 L/100 km, a mean absolute percentage error of 10.4%, a mean square error of 1.536, and an R-squared (R2) value of 0.642. This study also assesses a large pool of potential factors affecting real-world fuel consumption, from which the three most important factors are extracted, namely, reference fuel-consumption-rate value, engine power, and light-duty vehicle brand. Furthermore, a comparative analysis reveals that the vehicle factors with the greatest impact are the vehicle brand, engine power, and engine displacement. The average air pressure, average temperature, and sunshine time are the three most important climate factors.

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Analysis of fuel consumption of China light duty vehicle test cycle for passenger car(CLTC-P)

E3S Web of Conferences ◽

10.1051/e3sconf/202126801029 ◽

2021 ◽

Vol 268 ◽

pp. 01029

Author(s):

Meng Zhou ◽

Chongzhi Zhong ◽

Jingyuan Li

Keyword(s):

Fuel Consumption ◽

Air Conditioning ◽

Test Results ◽

Test Cycle ◽

Test Procedures ◽

Light Duty ◽

Certification Test ◽

Light Duty Vehicle ◽

Vehicle Test ◽

P Cycle

Through the fuel consumption test of several listed vehicles in China, the basic fuel consumption results of cold start under CLTC-P cycle, the fuel consumption results of vehicles under the condition of air conditioning on, and the fuel consumption results of vehicles under the condition of air conditioning off are measured. At the same time, the differences between NEDC cycle and CLTC-P cycle in China's fuel consumption certification test are compared, and the results of fuel consumption test are combined The fuel consumption test results under CLTC-P cycle are higher than those under NEDC cycle, and the fuel consumption test procedures under Chinese condition are more in line with the actual driving situation in China.

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Research on exhaust emission characteristics and technical route under CLTC cycle

E3S Web of Conferences ◽

10.1051/e3sconf/202126801054 ◽

2021 ◽

Vol 268 ◽

pp. 01054

Author(s):

Peilin Geng ◽

Yimin Wang ◽

Wei Zhao ◽

Xionghui Zou

Keyword(s):

Fuel Injection ◽

Direct Injection ◽

Pollutant Emissions ◽

Exhaust Emission ◽

Emission Characteristics ◽

Emission Standard ◽

Light Duty ◽

Light Duty Vehicle ◽

Vehicle Test ◽

Injection Technology

In this paper, the light duty that meets the China 6 emission standard is selected to study the emission characteristics of different emission control technology routes under China light-duty vehicle test cycle (CLTC). The results show that the cold start stage of CLTC cycle is still the stage with the most pollutant emissions. The THC, CO and NOx emissions of vehicles on the supercharged direct injection technology are higher than those on the naturally aspirated port fuel injection technology. In terms of reducing the exhaust emission, PHEV technology route is the best, followed by naturally aspirated PFI technology route, and then turbocharged direct injection with GPF route.

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True Decommissioning: Removing Internal Combustion Engine Light-Duty Vehicles Permanently, Quickly, and Equitably

10.31224/osf.io/n2rjs ◽

2021 ◽

Author(s):

Sita M. Syal ◽

Karen Eggerman ◽

Margot Gerritsen

Keyword(s):

Internal Combustion Engine ◽

Combustion Engine ◽

Internal Combustion ◽

The Road ◽

Light Duty ◽

Vehicle Mobility ◽

Light Duty Vehicle ◽

Research Questions ◽

Policies And Programs ◽

Light Duty Vehicles

In this paper, we define True Decommissioning as the removal of internal combustion engine light-duty vehicles from the road permanently, quickly, and equitably. We discuss each interlinked component of True Decommissioning. We then outline the next steps for implementation, including engaging stakeholders, evaluating economic costs and benefits, and understanding policies and programs. Finally, we present a table of unanswered research questions in this area, including those our research group is working on. We welcome discussions on how we can achieve True Decommissioning and work together to facilitate an equitable transition to clean light-duty vehicle mobility for all.

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