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February 9, 2026SAE International Journal of Engines0 citations

TwinAV Valve Timing Strategy for Turbocharged Spark-Ignition Engine Evaluation

TwinAV: Valve Timing Strategy for Divided Exhaust Periods in Turbocharged Spark-Ignition Engines: A Simulation-Based Evaluation

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Authors

AGAndreas GotterAGAlexander Gotter

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Overview

Simulation-based evaluation demonstrates reduced backpressure and improved fuel efficiency in turbocharged engines, indicating better engine performance.

Key Points

  • The study aims to evaluate the TwinAV concept for optimizing valve timing in turbocharged spark-ignition engines to improve efficiency by reducing backpressure and residual gases.
  • Adapted a 1D simulation model to a 4-cylinder gasoline turbocharged engine
  • Applied the TwinAV concept focusing on valve timing and manifold configurations
  • Conducted simulations across the full RPM range and varied loads for performance benchmarking
  • Achieved a specific fuel consumption benefit of 6.4%
  • Reduced static backpressure and less knock sensitivity due to lower internal exhaust gas recirculation
  • Simulation results showed performance improvements particularly in the upper half of the engine map
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Cite This Study

Gotter et al. (2026) studied this question.

synapsesocial.com/papers/69897a86f0ec2af6756e8b0bhttps://doi.org/10.4271/03-19-01-0002
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