Assessment by Simu ation of Benefits of New HEV Powertrain Configurations

Abstract

-Assessment by Simulation of Benefits of New HEV Powertrain ConfigurationsDuring the past couple of years, numerous powertrain configurations for Hybrid Electric Vehicles (HEV) have been introduced into the marketplace. The current dominant architecture is the power-split configuration with the input split (single-mode) from Toyota and Ford. General Motors (GM) recently introduced a two-mode power-split configuration for applications in sport utility vehicles. Also, the first commercially available Plug-In Hybrid Electric Vehicle (PHEV) -the GM Volt -was introduced into the market in 2010. The GM Volt uses a series-split powertrain architecture, which provides benefits over the series architecture, which typically has been considered for Electric-Range Extended Vehicles (E-REV). This paper assesses the benefits of these different powertrain architectures (single-mode versus multi-mode for HEV) (series versus GM Voltec for PHEV) by comparing component sizes, system efficiency and fuel consumption over several drive cycles. On the basis of dynamic models, a detailed component control algorithm was developed for each configuration. The powertrain components were sized to meet all-electric-range, performance and grade-capacity requirements. This paper presents and compares the impact of these different powertrain configurations on component size and fuel consumption.

Feasibility Analysis of a Double-Acting Composite Cylinder in High-Pressure Loading Conditions for Fluid Power Applications

“…Longitudinal fractures induced by the low-cycle fatigue are assumed not to occur in the steel liner if its strain levels are bounded below the ε lim value under operating conditions, i.e., if inner radial displacement of the CFRP tube remains below ε lim r i , see Equation (6). Table 6 summarizes the three design constraints described above.…”

“…Weight reduction and fuel consumption optimization are challenging tasks during the design of vehicles [1,2], both in the automotive and in the handling machinery area. These requirements have traditionally been met by adopting innovative materials such as composites [3,4] and investigating new engine architectures [5,6]. In fact, vehicles can be categorized as (i) light duty vehicles, e.g., cars, SUVs; (ii) industrial heavy vehicles, e.g., commercial vehicles and vans; and also (iii) earth moving machines, e.g., excavators and mobile platforms.…”