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

2015 ◽  
Vol 22 (10) ◽  
pp. 7450-7460 ◽  
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

scholarly journals Influence of Test Cycles on Energy Consumption Test of Electric Vehicles

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.

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

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.

Development of China Light-Duty Vehicle Test Cycle

2020 ◽  
Vol 21 (5) ◽  
pp. 1233-1246
Author(s):  
Yu Liu ◽  
Zhi Xin Wu ◽  
Hua Zhou ◽  
Han Zheng ◽  
Nan Yu ◽  
...  
Keyword(s):  
Test Cycle ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test

scholarly journals Comparative Analysis of China Light-duty Vehicle Test cycle for Passenger Car and Other Typical Driving Cycles

2021 ◽  
Vol 241 ◽  
pp. 02002
Author(s):  
Yu Liu ◽  
Yongkai Liang ◽  
Hanzhengnan Yu ◽  
Xiaopan An ◽  
Jingyuan Li
Keyword(s):  
Automobile Industry ◽  
Driving Cycle ◽  
Third Party ◽  
National Standard ◽  
Test Cycle ◽  
Passenger Cars ◽  
Passenger Car ◽  
Light Duty ◽  
Light Duty Vehicle ◽  
Vehicle Test

In 2019, China issued the first national standard for vehicle driving cycle, in which China light-duty vehicle test cycle for passenger car (CLTC-P) is the driving cycle for light-duty passenger cars. CLTC-P is of great significance to the development of China’s automobile industry, and has a great impact on the development and calibration of vehicles of automobile enterprises. In this paper, firstly, the driving characteristics of CLTC-P are analyzed systematically. Then it is compared with the third-party navigation big data to prove the rationality and effectiveness. Finally, CLTC-P is compared with other legal cycles in terms of time, distance, speed, and acceleration characteristics. The result shows that by comparing the characteristics of CLTC-P with other typical cycles and the GIS weighted results, the CLTC-P is more in line with Chinese reality and is significantly different from other typical cycles.

scholarly journals Research on exhaust emission characteristics and technical route under CLTC cycle

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.

Real-time NOx estimation in light duty diesel engine with in-cylinder pressure prediction

2021 ◽  
pp. 146808742110157
Author(s):  
Youngbok Lee ◽  
Seungha Lee ◽  
Kyoungdoug Min
Keyword(s):  
Prediction Model ◽  
Real Time ◽  
Pressure Sensor ◽  
Design Stage ◽  
Lean Nox Trap ◽  
Nox Emissions ◽  
Cylinder Pressure ◽  
Estimation Model ◽  
Light Duty ◽  
Light Duty Vehicle

Recently, there have been numerous efforts to cope with automotive emission regulations. Various strategies to reduce engine-out NOx emissions and proper after-treatment systems, such as selective catalytic reduction (SCR) and lean NOx trap (LNT), have been taken into account in the engine research field. In this study, real-time engine-out NOx prediction model was established where zero-dimensional NO and NO2 models were combined with in-cylinder pressure model. During the procedure for estimating NO and NO2 (NOx), a real-time prediction model of in-cylinder pressure was applied so that the inputs to the NOx prediction model could be provided only by the data acquired from the engine control unit (ECU). This implies that an in-cylinder pressure sensor is not necessarily required to properly predict the engine-out NOx in real time. The real-time NOx estimation model was validated through the worldwide harmonized light-duty vehicle test cycle (WLTC) without a pressure sensor, and the total NOx error during the mode was comparable with the total NOx error of the portable NOx sensor. This real-time NOx estimation model can ultimately contribute to minimizing tail-pipe NOx emissions by influencing both emission calibration at the engine design stage and the management of NOx after-treatment systems where NOx conversion efficiency is heavily affected by the NO2/NO ratio.

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

2021 ◽  
Vol 268 ◽  
pp. 01045
Author(s):  
Xiaopan An ◽  
Yu Liu ◽  
Hanzhengnan Yu ◽  
Zhichao Liu ◽  
Songbo Qi ◽  
...  
Keyword(s):  
Weighting Factor ◽  
Test Method ◽  
Test Time ◽  
Energy Regulation ◽  
Light Duty ◽  
New Energy ◽  
Time Test ◽  
Light Duty Vehicle ◽  
Vehicle Test ◽  
Light Duty Vehicles

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.

Optimal investment strategies for light duty vehicle and electricity generation sectors in a carbon constrained world

2016 ◽  
Vol 255 (1-2) ◽  
pp. 391-420 ◽  
Author(s):  
Boxiao Chen ◽  
Erica Klampfl ◽  
Margaret Strumolo ◽  
Yan Fu ◽  
Xiuli Chao ◽  
...  
Keyword(s):  
Electricity Generation ◽  
Optimal Investment ◽  
Investment Strategies ◽  
Light Duty ◽  
Light Duty Vehicle

Low-Level Automated Light-Duty Vehicle Technologies Provide Opportunities to Reduce Fuel Consumption

2018 ◽  
Vol 2672 (24) ◽  
pp. 60-74 ◽  
Author(s):  
Saeed Vasebi ◽  
Yeganeh M. Hayeri ◽  
Constantine Samaras ◽  
Chris Hendrickson
Keyword(s):  
Fuel Consumption ◽  
Aerodynamic Force ◽  
The United States ◽  
Route Guidance ◽  
Conventional Vehicle ◽  
Automated Vehicle ◽  
Fuel Savings ◽  
Light Duty ◽  
Vehicle Systems ◽  
Light Duty Vehicle

Gasoline is the main source of energy used for surface transportation in the United States. Reducing fuel consumption in light-duty vehicles can significantly reduce the transportation sector’s impact on the environment. Implementation of emerging automated technologies in vehicles could result in fuel savings. This study examines the effect of automated vehicle systems on fuel consumption using stochastic modeling. Automated vehicle systems examined in this study include warning systems such as blind spot warning, control systems such as lane keeping assistance, and information systems such as dynamic route guidance. We have estimated fuel savings associated with reduction of accident and non-accident-related congestion, aerodynamic force reduction, operation load, and traffic rebound. Results of this study show that automated technologies could reduce light-duty vehicle fuel consumption in the U.S. by 6% to 23%. This reduction could save $60 to $266 annually for the owners of vehicles equipped with automated technologies. Also, adoption of automated vehicles could benefit all road users (i.e., conventional vehicle drivers) up to $35 per vehicle annually (up to $6.2 billion per year).

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