scholarly journals Making the Most of the Energy We Have: Vehicle Efficiency

2020 ◽  
Author(s):  
Araan Mohanadass
Keyword(s):  
Vehicle Efficiency

Driving Schedules Influence Electric and Hybrid Vehicle Efficiency

1999 ◽  
Author(s):  
Floyd A. Wyczalek
Keyword(s):  
Hybrid Vehicle ◽  
Vehicle Efficiency

Driveline Configuration and Terrain Effect on Slippage and Efficiency of a 6×6/6×4 Truck

2013 ◽  
Author(s):  
Vladimir V. Vantsevich ◽  
Dennis Murphy ◽  
Gianantonio Bortolin ◽  
Blair Farley ◽  
Gabriel Judd
Keyword(s):  
Energy Efficiency ◽  
Analytical Method ◽  
Power Distribution ◽  
Operating Conditions ◽  
Surface Type ◽  
Vehicle Efficiency ◽  
Terrain Effect ◽  
Truck Transportation

The power distribution between driving wheels has been shown to have a significant impact on vehicle energy efficiency, but there has only been limited research in this area. As shown in this paper, the wheel power distribution is largely dependent on the power dividing units (PDUs) which split/vector power between the driving wheels. The performance of a particular driveline system will also depend largely on the terrain conditions the vehicle encounters. This paper presents an analysis of PDU configurations in 6×6/6×4 terrain trucks. The vehicle efficiency is evaluated in a wide variety of typical operating conditions including varying surface types, speeds and accelerations, and slope conditions. An analytical method is presented which can be used to determine the tire circumferential forces and slippages. Finally, an analysis of the effects of the driveline configuration, terrain, and surface type on truck transportation efficiency is presented for three PDU combinations.

Minimum Safety Distances for Emergency Braking Maneuvers in Car-Following Applications

2020 ◽  
Author(s):  
Devin Schafer ◽  
Pingen Chen
Keyword(s):  
Aerodynamic Force ◽  
Lane Change ◽  
Passenger Vehicle ◽  
Lane Changing ◽  
Car Following ◽  
Emergency Braking ◽  
Safety Distance ◽  
Bicycle Model ◽  
Vehicle Efficiency ◽  
Different Types

Abstract Platooning/car following has been considered as a promising approach for improving vehicle efficiency due to the reduction of aerodynamic force when closely following a pilot vehicle. However, safety is a major concern in the close car platooning/following. This paper investigates the minimum inter-vehicle distances required for a passenger vehicle to safely travel behind a heavy-duty truck with three different types of emergency maneuvers. The three emergency maneuvers considered are braking only, steering only, and braking then steering, where steering refers to a single lane change maneuver. Numerical analysis is conducted for deriving the clearance space in the braking only scenario. In addition, simulations are conducted in MATLAB/Simulink, using a bicycle model for the vehicle dynamics, to examine the minimum safe following distance for the other two scenarios. The simulation results show that, for initial vehicle speeds greater than 8 m/s, a lane change maneuver requires the shortest safety distance. Braking followed by lane changing usually requires the largest minimum safety distance.

Lightweight Feeling - Driving Excitement, Vehicle Efficiency and Costs of BEV in Conflict

2021 ◽  
pp. 592-605
Author(s):  
Georg Schrank ◽  
Martin Arntz ◽  
Christoph Sams
Keyword(s):  
Vehicle Efficiency

A Biomimetic Jellyfish-Inspired Jet Propulsion System Using an Iris Mechanism

2012 ◽  
Author(s):  
Kenneth Marut ◽  
Colin Stewart ◽  
Alex Villanueva ◽  
Dragan Avirovik ◽  
Shashank Priya
Keyword(s):  
Power Consumption ◽  
Test Stand ◽  
Propulsion System ◽  
Experimental Results ◽  
Jet Propulsion ◽  
Iris Diaphragm ◽  
Propulsion Mechanism ◽  
Vehicle Efficiency ◽  
Maximum Thrust

A bio-inspired jet propulsion mechanism was designed and developed for development of proficient unmanned undersea vehicles (UUVs). The propulsion mechanism mimics that of the Sarsia sp. jellyfish which measures approximately 1 cm in diameter. In order to achieve a biomimetic uniform bell contraction, an electrical motor was used in conjunction with a novel circumferential actuator based upon a mechanical iris diaphragm. This mechanism allows actuation of a deformable cavity. The current prototype was scaled to a diameter 10 times larger than Sarsia measuring 10 cm in diameter. The performance of the propulsion mechanism was analyzed both experimentally theoretically. The prototype was mounted on a test stand which allowed for measurement of thrust and power consumption. Analytical and experimental results were compared to that of the performance of Sarsia. It was found that the overall mechanism created a maximum thrust of 5.1 N with a calculated vehicle efficiency of 0.17% and proficiency of 4.8 s−1.

scholarly journals Vehicle Efficiency Maintaining System

2020 ◽  
Vol 22 (12) ◽  
Author(s):  
Rohit Kothawale ◽  
◽  
Sarika Patil ◽  
MANJUSHA NAMEWAR ◽  
Aniket Mahajan ◽  
...  
Keyword(s):  
Real Time ◽  
Fuel Efficiency ◽  
Maximum Efficiency ◽  
Mountain Areas ◽  
The Road ◽  
Vehicle Efficiency ◽  
Speed Range ◽  
Road Slope ◽  
Take All

This project is based on increasing the fuel efficiency of vehicle. Every vehicle is given an economy speed range by the respective company . But this range will vary due to parameters like the weight of the vehicles and passengers, condition of road, slope of the road, temperature ,etc. During real time this economy range will vary . This system will help the driver to maintain actual economy speed. While driving in mountain areas on the slopes, the economy speed range will be different than on plane roads. This system will take all these parameters in account and navigate the driver to get the maximum efficiency in all situations. In addition to this the driver will provide the driver the approximate kilometers the vehicle can travel in the current fuel. The circuit, working and need of the system is briefly discussed in this paper.

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