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Simulation study suggests ORC waste heat recovery system could deliver potential 7% improvement in fuel consumption in a PHEV on highway

Green Car Congress

Starting from a energy-based powertrain simulation model validated on experimental data from the PHEV, the researchers conducted a first- and second-law analysis to identify the potential for engine waste heat recovery, considering a variety of driving cycles and assuming the vehicle operating in charge-sustaining (HEV) mode.

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US Army Awards SBIR Contract for Waste Heat Recovery Using a SuperTurbocharger Hybrid Engine

Green Car Congress

for a project developing a waste heat recovery system using VanDyne’s SuperTurbocharger technology. Downsizing from a 3.2L improved fuel economy 17%, and downsizing from a 4.2L Christopher James Chadwell, Mark Walls (2010) Analysis of a SuperTurbocharged Downsized Engine Using 1-D CFD Simulation. The VanDyne SuperTurbo.

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BorgWarner suggests Valve-Event Modulated Boost system can offer 6-17% fuel economy benefit over already downsized and turbocharged engines

Green Car Congress

Turbo boost can be controlled by changing the timing of the exhaust valves—no waste gate is required. By separating the two parts of the exhaust event by phasing the exhaust valves via the concentric camshaft, VEMB allows the turbo to capture the blow-down energy while avoiding pumping losses through the turbocharger.

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Testing confirms Torotrak V-Charge variable drive mechanical supercharger enables more ambitious downsizing; 1.0L demo at Aachen

Green Car Congress

Independent on-engine test results have verified the simulation predictions that a Torotrak V-Charge variable drive mechanical supercharger enables more ambitious levels of engine downsizing. Next generation downsizing and downspeeding remain the industry’s best near-term solutions for reducing carbon emissions.

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Hyundai showcasing new downsized turbo engines and 7-speed dual-clutch transmission; i40 48V Hybrid, i30 CNG

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The new engine comes with an electronically-controlled waste-gate to optimize flow and improve low-end torque and throttle response.

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Rotrak testing prototype variable drive supercharger in vehicle on dyno

Green Car Congress

In a 2010 paper, Roger Stone, Engineering Director, Torotrak noted that conventional turbo- and supercharging technologies are more than capable of delivering the required peak power and torque levels from downsized engines but suffer from a number of. ratio means that they are effectively over-sized and therefore wasteful at higher speeds.

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DOE to Award $187M to 9 Projects to Improve Vehicle Efficiency for Heavy-Duty Trucks and Passenger Vehicles

Green Car Congress

These projects will receive more than $115 million in funding to develop and demonstrate systems-level fuel efficiency technologies by 2015, including improved aerodynamics, reducing engine idling technologies, waste heat recovery to increase engine efficiency, advanced combustion techniques, and powertrain hybridization. 38,831,115.