Analysis on fuel economy and advanced systems of hybrid vehicles

Iwai, Nobuo

doi:10.1016/s0389-4304(98)00047-2

Cited by 20 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure , the improvement of energy density from our Li‐S cells by a factor of 2.5 or higher, compared to that of LiCoO 2 , implies that the performance of EVs can be comparable to those of IC‐based vehicles. As an example, a typical 100‐hp (∼73.5‐kW) IC engines weighs 100 kg, the power density is 613 W/kg considering a half filled fuel (∼20 kg). An EV with 100 hp has an electric motor typically weighing ∼30 kg .…”

mentioning

confidence: 99%

Liquid‐Type Cathode Enabled by 3D Sponge‐Like Carbon Nanotubes for High Energy Density and Long Cycling Life of Li‐S Batteries

Yang

2014

Advanced Materials

114

View full text Add to dashboard Cite

High energy density and long-term stability of Li-S batteries are achieved by employing a 3D sponge-like carbon nanotube cathode and a liquid-type polysulfide catholyte. Carbon nanotubes not only provide excellent electron pathways and polysulfide reservoirs, but they can also be used as a standalone cathode without current collectors, which greatly alleviates problems arising from insulating sulfur and polysulfide shuttles as well as remarkably increasing the energy density.

show abstract

mentioning

confidence: 99%

Liquid‐Type Cathode Enabled by 3D Sponge‐Like Carbon Nanotubes for High Energy Density and Long Cycling Life of Li‐S Batteries

Yang

2014

Advanced Materials

114

View full text Add to dashboard Cite

show abstract

“…A torque assisting system [7][8][9][10][11][12][13], which provides an additional power, not only reduces the engine size significantly but also enables intermittent engine operation [14] (or Start-Stop operation [13]). On the basis of this point, the hybrid electric/mechanical powertrain (HEV) has attracted serious attention as it is expected to save over 10% of fuel consumption [15]. The Honda Insight [16] and Toyota Prius [17,18] are two types of HEVs available on the market today.…”

Section: %mentioning

confidence: 99%

“…According to this strategy, the engine is only operational when it is required to propel the vehicle, whereas it is shut down and/or separated from the powertrain in all other conditions. The fact that this strategy can save more than 10% fuel consumption [2,15] indicates its significance. The VW Golf Ecomatic employed an idle-off system [19] to cut off the fuel when the vehicle is standing still or when the accelerator pedal is released.…”

Section: %mentioning

confidence: 99%

See 1 more Smart Citation

IdleStop and Go: a way to improve fuel economy

Shen

Vroemen

Veldpaus

2006

Vehicle System Dynamics

View full text Add to dashboard Cite

This paper proposes a mechanical solution to save fuel by shutting down an internal combustion engine whenever it is unnecessary for propulsion, e.g., when a vehicle is waiting for traffic lights. The engine and vehicle are restarted using the energy that is stored in a flywheel. Two additional clutches are needed to enable appropriate power flow from the flywheel to the engine and vehicle. This complicates the powertrain dynamics in that the number of degrees of freedom changes due to clutch operations. Therefore, a hybrid control strategy, which is treated as a top-level controller, is introduced to deal with this finite-state mechanical system. At the lower level, the engine and clutches are controlled in a coordinated manner such that the vehicle is launched according to the driver's demands. Using a comprehensive powertrain simulation package, the proposed controller is evaluated numerically.

show abstract

“…In addition, heat from exhaust gases from engines has still not been used effectively or researched without being verified carefully. As indicated in [8][9][10][11], over 70% of the initial energy from fuel can not be converted to mechanical energy, and is instead mainly directed to other parts of the engine in the form of heat or emitted as exhaust gases. These results in the energy efficiency of vehicles equipped with the ICE being as low as 15%, according to [12].…”

Section: Introductionmentioning

confidence: 99%

Aspect of Dynamic Simulation and Experimental Research Studies on Hybrid Pneumatic Power System

Huang

Nguyen

2010

International Journal of Vehicular Technology

View full text Add to dashboard Cite

A Hybrid Pneumatic Power System (HPPS) has been developed for several years with the major aim of reducing the vehicle fuel consumption, environment pollution and enhancing the vehicle performance as well. Comparing with the conventional hybrid system, HPPS replaces the battery's electrochemical energy with a high-pressure air storage tank and enables the internal combustion engine (ICE) to function at its sweet spot. Besides, the HPPS, which effectively merges both the high-pressure air flow from the storage tank and the recycled exhaust flow from the ICE, thereby increases the thermal efficiency of the ICE and transforms the merged flow energy into mechanical energy using a high-efficiency turbine. This paper focuses on the major research process into HPPSs, including overall dynamic simulation and experimental validation. By using the simulation tool ITI-Sim, this research demonstrates an experiment which can be operated precisely according to the requirements of various driving conditions under which a car actually runs on the road in accordance with the regulated running vehicle test mode. HPPS is expected to increase the performance of the entire system from 15% to 39%, and is likely to replace the traditional system in the coming years.

show abstract

Analysis on fuel economy and advanced systems of hybrid vehicles

Cited by 20 publications

References 0 publications

Liquid‐Type Cathode Enabled by 3D Sponge‐Like Carbon Nanotubes for High Energy Density and Long Cycling Life of Li‐S Batteries

Liquid‐Type Cathode Enabled by 3D Sponge‐Like Carbon Nanotubes for High Energy Density and Long Cycling Life of Li‐S Batteries

IdleStop and Go: a way to improve fuel economy

Aspect of Dynamic Simulation and Experimental Research Studies on Hybrid Pneumatic Power System

Contact Info

Product

Resources

About