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Simulation study finds “Millerizing” the Scuderi split-cycle engine could enable 50% engine downsizing with retention of power and torque, along with reduced fuel consumption

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Simulation study finds Miller version of Scuderi engine can deliver twice the BMEP as naturally aspirated version, theoretically enabling 50% downsizing while maintaining performance. Applying the Miller cycle to the Scuderi engine (right) entails downsizing of the compression cylinder. Source: Scuderi. Click to enlarge.

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

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Exhaust system configuration. SCR coated on filter (SCR-F) allows for close coupling of an SCR (selective catalytic reduction) function for fast light off. Earlier post.). In addition, the cold start catalyst also exhibits excellent CO, HC, and NO oxidation activity under normal lean conditions.

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Pinnacle 4-stroke opposed-piston SI engine shows fuel economy improvements of between 30-60% at light loads, 12-30% at medium loads over conventional

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The results represent a light-load indicated efficiency improvement of 15-30% (up to 40.9%). The test engine for the paper was a 250cc single-cylinder unit with dual-camshaft-actuated reciprocating sleeve valves for induction and exhaust. There is no ISFC improvement at high load. Click to enlarge.

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ACCESS project targeting 30% improvement in fuel economy and SULEV emissions in light-duty gasoline engine; multi-mode SI/HCCI combustion

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Elements of the multi-mode combustion system include: Spark-ignited (SI) combustion with high compression ratio and high boost assisted by cooled external exhaust gas recirculation (EGR). Two-stage boost—a small supercharger for HCCI, and a regular turbocharger for downsizing.

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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

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Internal combustion engines have been significantly improving in the past decade, after the adoption of technologies such as Gasoline Direct Injection, mild electrification, downsizing and turbocharging. The OSU EcoCAR prototype vehicle features an extended-range electric architecture with a downsized 1.8L —Marcello Canova.

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Rotrak testing prototype variable drive supercharger in vehicle on dyno

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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. It gives the next generation of downsized powertrains ‘big-engine’ response.

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CPT launching water-cooled electric supercharger for commercial diesel engines

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Below this GVW the technology has already been acquired by Valeo as a supercharger for cars and light commercial vehicle applications. Unlike a turbocharger, Cobra is not dependent on the exhaust gases flowing to do its work. Earlier post.) The benefits of Cobra to the engine developer and end user depend on the application.

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