Assessing the Regeneration Potential for a Refuse Truck Over a Real-World Duty Cycle

2012 ◽  
Vol 5 (1) ◽  
pp. 364-370 ◽  
Author(s):  
Andrej Ivanco ◽  
Rajit Johri ◽  
Zoran Filipi
Keyword(s):  
Real World ◽  
Duty Cycle ◽  
Regeneration Potential

scholarly journals In for the Long Haul

1999 ◽  
Vol 121 (02) ◽  
pp. 60-61
Author(s):  
Phil Kittredge ◽  
Thomas Urbas ◽  
Wayne Shintaku
Keyword(s):  
Real Time ◽  
Real World ◽  
Duty Cycle ◽  
Experimental Mechanics ◽  
Heavy Vehicle ◽  
Heavy Duty ◽  
The Real ◽  
Clutch Pedal ◽  
Heavy Duty Truck ◽  
Comprehensive Data

This article focuses on the fact that engineers at Meritor Automotive decided to learn how truck components really held up on the highways. So they outfitted an 18-wheeler with the company’s products for a 24,000-mile trial, in real time and in the real world. According to Meritor, the comprehensive data generated by the test has spurred improvements in brake components, clutches, drivelines, axles, and transmissions. The company claims that the data opens opportunities for improvements in virtually every type of heavy-duty truck component that Meritor builds. The engineers in Meritor’s experimental mechanics unit enlisted support from all the groups in the heavy vehicle division. The use of a channel to record clutch pedal displacement helped engineers improve their model for determining the number of clutch applications in a line-haul duty cycle. Meritor expects that this information will lead to improved durability of several clutch components.

Development of a Duty Cycle for the Design and Optimization of Advanced, Heavy-Duty Port Drayage Trucks

2017 ◽  
Vol 2609 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Pascal Amar ◽  
Parthav Desai ◽  
Aravind Kailas ◽  
Jean-Baptiste Gallo
Keyword(s):  
Real World ◽  
Duty Cycle ◽  
Greenhouse Gas Emission ◽  
Aerodynamic Drag ◽  
Electrical Power ◽  
Rolling Resistance ◽  
Conventional Vehicle ◽  
Design And Optimization ◽  
Vehicle Simulation ◽  
Drayage Trucks

Hybrid electric and electric trucks are potential technology solutions for reducing emissions at ports. However, developing an advanced, low-emission technology driveline entails thoroughly understanding typical truck operations in the real-world environment. This paper presents the work performed to develop a novel, more representative drayage duty cycle that characterizes drayage truck operations in the ports of San Pedro Bay in California. Unlike a conventional vehicle, an optimized hybrid driveline requires detailed understanding not only of torque requirements and vehicle speeds but also of the potential recovery of dynamic brake energy, charging opportunities, stopping and idling times, and many other operational requirements. Keeping this in mind, the duty cycle presented in this paper incorporated real-world, near-dock activities of Class 8 drayage trucks such as daily hours of operation, mileage, altitude profiles of routes, and idling and key-off patterns. The empirical duty cycle model was subsequently integrated with a complete vehicle simulation to explore the best solutions to minimize energy consumption for drayage applications in and around the ports. The analysis presented indicates that trucks spent most of the generated power in overcoming aerodynamic drag and rolling resistance of tires for a complete drayage shift and that electrical auxiliary loads dominated for near-dock operations because of idling and low-speed profiles. Therefore, achieving zero-emission near-dock operations entails focusing on auxiliary loads and rolling resistance. By using simulations, it was estimated that a hybrid truck with electrical power limited to about 100 kW could deliver a greenhouse gas emission reduction of about 30%.

scholarly journals Medium Truck Duty Cycle Data from Real-World Driving Environments: Final Report

2012 ◽  
Author(s):  
Mary Beth Lascurain ◽  
Oscar Franzese ◽  
Gary J Capps ◽  
Adam Siekmann ◽  
Neil Thomas ◽  
...  
Keyword(s):  
Real World ◽  
Duty Cycle ◽  
Final Report

scholarly journals Medium Truck Duty Cycle Data from Real-World Driving Environments: Project Interim Report

2011 ◽  
Author(s):  
Oscar Franzese ◽  
Mary Beth Lascurain ◽  
Gary J Capps
Keyword(s):  
Real World ◽  
Duty Cycle ◽  
Interim Report

Replications can cause distorted belief in scientific progress

2018 ◽  
Vol 41 ◽  
Author(s):  
Michał Białek
Keyword(s):  
Real World ◽  
Scientific Progress ◽  
The Public ◽  
Psychological Science

AbstractIf we want psychological science to have a meaningful real-world impact, it has to be trusted by the public. Scientific progress is noisy; accordingly, replications sometimes fail even for true findings. We need to communicate the acceptability of uncertainty to the public and our peers, to prevent psychology from being perceived as having nothing to say about reality.

Two-photon excitation microscopy in cellular biophysics

1995 ◽  
Vol 53 ◽  
pp. 62-63
Author(s):  
David W. Piston ◽  
Brian D. Bennett ◽  
Robert G. Summers
Keyword(s):  
Confocal Microscopy ◽  
Laser Beam ◽  
Duty Cycle ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

Current Issues: Evidence-Based Practice for the Real World: Thoughts on Clinical Education in Communication Disorders

2010 ◽  
Vol 20 (3) ◽  
pp. 100-105 ◽  
Author(s):  
Anne K. Bothe
Keyword(s):  
Clinical Education ◽  
Real World ◽  
Evidence Based Practice ◽  
Communication Disorders ◽  
University Faculty ◽  
Evidence Based ◽  
Speech Language Pathology ◽  
Basic Principles ◽  
The Real ◽  
Language Pathology

This article presents some streamlined and intentionally oversimplified ideas about educating future communication disorders professionals to use some of the most basic principles of evidence-based practice. Working from a popular five-step approach, modifications are suggested that may make the ideas more accessible, and therefore more useful, for university faculty, other supervisors, and future professionals in speech-language pathology, audiology, and related fields.

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