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

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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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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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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Development of the Worldwide Harmonized Test Procedure for Light-Duty Vehicles

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2503-12 ◽

2015 ◽

Vol 2503 (1) ◽

pp. 110-118 ◽

Cited By ~ 21

Author(s):

Biagio Ciuffo ◽

Alessandro Maratta ◽

Monica Tutuianu ◽

Konstantinos Anagnostopoulos ◽

Georgios Fontaras ◽

...

Keyword(s):

Carbon Dioxide Emissions ◽

Test Procedure ◽

Test Results ◽

Test Cycle ◽

Test Procedures ◽

United Nations Economic Commission ◽

Vehicle Performance ◽

Light Duty ◽

Economic Commission ◽

Light Duty Vehicles

To assess vehicle performance on criteria compounds, carbon dioxide emissions, and fuel energy consumption, laboratory tests are generally carried out. During these tests, a vehicle is driven on a chassis dynamometer (which simulates the resistances the vehicle encounters during its motion) to follow a predefined test cycle. In addition, all conditions for running a test must strictly adhere to a predefined test procedure. The procedure is necessary to ensure that all tests are carried out in a comparable way, following the requirements set by the relevant legislation. Test results are used to assess vehicle compliance with emissions limits or to evaluate the fuel consumption that will be communicated to customers. Every region in the world follows its own approach in carrying out these types of tests. The variations in approaches have resulted in a series of drawbacks for vehicle manufacturers and regulating authorities, leading to a plethora of different conditions and results. As a step toward the harmonization of the test procedures, the United Nations Economic Commission for Europe launched a project in 2009 for the development of a worldwide harmonized light-duty test procedure (WLTP), including a new test cycle. The objective of the study reported here was to provide a brief description of WLTP and outline the plausible pathway for its introduction in European legislation.

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Development of China Light-Duty Vehicle Test Cycle

International Journal of Automotive Technology ◽

10.1007/s12239-020-0117-5 ◽

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

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

E3S Web of Conferences ◽

10.1051/e3sconf/202124102002 ◽

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.

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

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198118796401 ◽

2018 ◽

Vol 2672 (24) ◽

pp. 60-74 ◽

Cited By ~ 6

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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Smart rule-based diesel engine control strategies by means of predictive driving information

International Journal of Engine Research ◽

10.1177/1468087419835696 ◽

2019 ◽

Vol 20 (10) ◽

pp. 1047-1058 ◽

Cited By ~ 5

Author(s):

Giovanni Vagnoni ◽

Markus Eisenbarth ◽

Jakob Andert ◽

Giuseppe Sammito ◽

Joschka Schaub ◽

...

Keyword(s):

Fuel Consumption ◽

Control Strategies ◽

Control Unit ◽

Future Research ◽

Engine Control ◽

Test Cycle ◽

Rule Based ◽

Prediction Horizon ◽

Light Duty ◽

Path Control

The increasing connectivity of future vehicles allows the prediction of the powertrain operational profiles. This technology will improve the transient control of the engine and its exhaust gas aftertreatment systems. This article describes the development of a rule-based algorithm for the air path control, which uses the knowledge of upcoming driving events to reduce especially [Formula: see text] and particulate (soot) emissions. In the first section of this article, the boosting and the lean [Formula: see text] trap systems of a diesel powertrain are investigated as relevant sub-systems for shorter prediction horizons, suitable for Car-to-X communication range. Reference control strategies, based on state-of-the-art engine control unit algorithms and suitable predictive control logics, are compared for the two sub-systems in a model in the loop simulation environment. The simulation driving cycles are based on Worldwide harmonized Light-duty Test Cycle and Real Driving Emissions regulations. Due to the shorter, and consequently more probable, prediction horizon and the demonstrated emission improvements, a dedicated rule-based algorithm for the air path control is developed and benchmarked in the Worldwide harmonized Light-duty Test Cycle as described in the second part of this article. Worldwide harmonized Light-duty Test Cycle test results show an improvement potential for engine-out soot and [Formula: see text] emissions of up to 5.2% and 1.2%, respectively, for the air path case and a reduction of the average fuel consumption in Real Driving Emissions of up to 1% for the lean NOx trap case. In addition, the developed rule-based algorithm allows the adjustment of the desired NOx–soot trade-off, while keeping the fuel consumption constant. The study concludes with brief recommendations for future research directions, as for example, the introduction of a prediction module for the estimation of the vehicle operational profile in the prediction horizon.

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Exhaust emission and fuel consumption characteristics of light duty under different driving cycles

E3S Web of Conferences ◽

10.1051/e3sconf/202126801050 ◽

2021 ◽

Vol 268 ◽

pp. 01050

Author(s):

Peilin Geng ◽

Le Liu ◽

Yuwei Wang ◽

Xionghui Zou

Keyword(s):

Fuel Consumption ◽

Large Displacement ◽

Exhaust Emission ◽

Small Displacement ◽

Control Technology ◽

Test Cycle ◽

Testing Conditions ◽

Driving Cycles ◽

Light Duty ◽

The Difference

This paper focuses on light duty of china 6 with the same emission control technology. three vehicles, with different engine displacements, were selected to study the emission and fuel consumption characteristics under three test cycles of NEDC, WLTC and CLTC. The results show that the emissions of CO, THC and NOx under WLTC cycle are minimum, compared with the NEDC and CLTC circulation. with the decrease of the engine displacement, the difference of CO and THC emissions increases among different cycles, which shows small displacement engine vehicles are greatly affected by driving cycles. Compared with other testing conditions, the PN emissions are relatively larger, but the difference of PN emissions is very small among the three test cycles.The fuel consumption of the WLTC test cycle is the smallest among the three cycles. As the engine displacement decreases, the fuel consumption difference decreases, indicating that the fuel consumption of large displacement engine vehicles is greatly affected by the cycle condition.

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