The Influence of Rolling Resistance on Fuel Consumption in Heavy-Duty Vehicles

2013 ◽  
Author(s):  
Marco Mammetti ◽  
David Gallegos ◽  
Alex Freixas ◽  
Jordi Muñoz
Keyword(s):  
Fuel Consumption ◽  
Rolling Resistance ◽  
Heavy Duty ◽  
Heavy Duty Vehicles

scholarly journals In Use Determination of Aerodynamic and Rolling Resistances of Heavy-Duty Vehicles

2021 ◽  
Vol 13 (2) ◽  
pp. 974
Author(s):  
Dimitrios Komnos ◽  
Stijn Broekaert ◽  
Theodoros Grigoratos ◽  
Leonidas Ntziachristos ◽  
Georgios Fontaras
Keyword(s):  
Drag Coefficient ◽  
Fuel Consumption ◽  
Carbon Dioxide Emissions ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Heavy Duty ◽  
Air Drag ◽  
Speed Test ◽  
Rolling Resistance Coefficient ◽  
Heavy Duty Vehicles

A vehicle’s air drag coefficient (Cd) and rolling resistance coefficient (RRC) have a significant impact on its fuel consumption. Consequently, these properties are required as input for the certification of the vehicle’s fuel consumption and Carbon Dioxide emissions, regardless of whether the certification is done via simulation or chassis dyno testing. They can be determined through dedicated measurements, such as a drum test for the tire’s rolling resistance coefficient and constant speed test (EU) or coast down test (US) for the body’s air Cd. In this paper, a methodology that allows determining the vehicle’s Cd·A (the product of Cd and frontal area of the vehicle) from on-road tests is presented. The possibility to measure these properties during an on-road test, without the need for a test track, enables third parties to verify the certified vehicle properties in order to preselect vehicle for further regulatory testing. On-road tests were performed with three heavy-duty vehicles, two lorries, and a coach, over different routes. Vehicles were instrumented with wheel torque sensors, wheel speed sensors, a GPS device, and a fuel flow sensor. Cd·A of each vehicle is determined from the test data with the proposed methodology and validated against their certified value. The methodology presents satisfactory repeatability with the error ranging from −21 to 5% and averaging approximately −6.8%. A sensitivity analysis demonstrates the possibility of using the tire energy efficiency label instead of the measured RRC to determine the air drag coefficient. Finally, on-road tests were simulated in the Vehicle Energy Consumption Calculation Tool with the obtained parameters, and the average difference in fuel consumption was found to be 2%.

The effect of highway geometry on fuel consumption of heavy-duty vehicles operating in eco-driving mode

2017 ◽  
pp. 2179-2185
Author(s):  
G.K. Booto ◽  
R.A. Bohne ◽  
H. Vignisdottir ◽  
K. Pitera ◽  
G. Marinelli ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Heavy Duty ◽  
Driving Mode ◽  
Heavy Duty Vehicles

The Mechanical Characteristics Study on an Interconnected Anti-Rolling Suspension System

2013 ◽  
Vol 791-793 ◽  
pp. 676-680
Author(s):  
You Shan Hou ◽  
Hui Xin Song ◽  
Chao Wang
Keyword(s):  
Mechanical Characteristics ◽  
Digital Simulation ◽  
Rolling Resistance ◽  
Simulation Method ◽  
Suspension System ◽  
Heavy Duty ◽  
Nonlinear Mathematical Models ◽  
Critical Technology ◽  
Study Results ◽  
Heavy Duty Vehicles

The heavy-duty special vehicles easily roll during steering, anti-rolling technology becomes a critical technology to the heavy-duty vehicles. Aiming at the rolling problem of a full load heavy vehicle in the process of steering, an interconnected anti-rolling suspension system with adjustable damping was designed, the nonlinear mathematical models of both hydro-pneumatic independent suspension and interconnected anti-rolling suspension system were established. The mechanical characteristics of two kind of suspension were studied through digital simulation method, discussing the system parameter changes affection on the performance of interconnected anti-rolling suspension system. The study results indicate that the interconnected anti-rolling suspension system bitterly improves vehicles rolling resistance in contrast to the oil-gas mixed independent suspension, the study results provide theoretical basis for the anti-rolling s design of heavy-duty vehicles.

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