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New Efficient Supercharger with Variable Drive for Downsized Gasoline Engines

Green Car Congress

Rotrak, the new 50:50 joint-venture between traction drive specialist Torotrak plc and centrifugal supercharger company Rotrex AS, will present a highly efficient supercharger system in a paper at the 15 th Supercharging Conference in Dresden on 24 September. —Torotrak engineering manager David Burtt, co-author of the paper.

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Cummins progressing with lightweight downsized T2B2 diesel for pickup; 40% improvement in fuel economy over gasoline V8

Green Car Congress

Exhaust system configuration. Resources (DOE will publish Merit Review presentations on its website.). The HC/NO x release temperature in a cold start catalyst is high enough that the released HC/NO x can be further converted by the downstream catalytic components. Weigert, E.,

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

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The VEMB system uses a concentric camshaft, blow-down manifold and scavenge manifold to separate the exhaust event into two phases: high-energy blow-down to the turbo without pumping losses, and high-hydrocarbon scavenge to the EGR system. Source: Borgwarner. Click to enlarge.

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Valeo acquires electric supercharger business from Controlled Power

Green Car Congress

Unlike exhaust-driven turbochargers, electric superchargers are driven by an electric motor. Highly efficient at low engine revolutions, electric superchargers make it possible to downsize engines. With this move, Valeo becomes the first automotive supplier to offer its customers a range of electric superchargers.

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New Audi S models to feature new downsized 4.0L V8 with cylinder deactivation, energy recuperation and start-stop

Green Car Congress

Audi will present its new S models for the first time at the 2011 Frankfurt Auto Show (IAA). This is a downsized platform from the prior 5.2L The new S6, S7 and S8 feature a new 4.0L TFSI V8 with cylinder deactivation (cylinder-on-demand), energy recuperation and start-stop system). naturally aspirated V10.

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Split injection Miller cycle with boost decreases knock tendency and increases torque in downsized engine

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Researchers at Tianjin University in China report that combing split injection to the Miller cycle with boost pressure can effectively decrease the knock tendency and increase the engine torque in a downsized spark-ignition engine. Their paper is published in the journal Fuel. —Wei et al. L and a compression ratio of 10:1.

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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

Their paper was presented at the ASME Internal Combustion Engine Division 2012 Fall Technical Conference by Marcello Canova, assistant professor at OSU; lead author was Philipp Skarke, from the University of Stuttgart Institute for Internal Combustion Engines and Automotive Engineering. Exhaust gas exergy map of EcoCAR engine.

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