Office of Technology Transfer – University of Michigan

Cylinder Pressure and Heat Release Analysis Tool for Advanced Combustion Engines

Technology #6395

Development of Advanced Combustion Engine technologies is approaching landmark milestones with upcoming commercial production of homogeneous charge compression ignition (HCCI) and other improved internal combustion engines (ICE). In order to support the manufacture of efficient engines of the future, design tools need to be able to model the unique fuel and combustion conditions inside these engines. The Advanced Combustion Engine Heat Release Analysis (ACE-HRA) tool is a new software package for the analysis of cylinder pressure and thermodynamics that will help drive the next generation of internal combustion engine design.

New thermodynamic models and methods enhance modeling accuracy

Using novel analytical methods and detailed thermodynamics properties databases, ACE-HRA can greatly improve the fidelity of design simulations of new engine technologies. These methods draw on new insights about combustion dynamics discovered at the University of Michigan, and have been packaged in an easy-to-use program with powerful scripting and visualization functionality and parallel execution capability. And while ACE-HRA is focused on newer ICE technologies, it can also be used to analyze data from more traditional gasoline and diesel engines.


  • Cylinder pressure and heat release analysis of internal combustion engines
  • Design support specifically for spark-ignition (SI), homogeneous-charge compression ignition (HCCI) and spark- assisted compression ignition (SACI) combustion engines.


  • Improved modeling fidelity using detailed thermodynamic properties and novel analytical methods
  • Enhanced physical understanding and analysis of combustion
  • Extensible with multi-component fuel capabilities
  • Powerful visualization and scripting integration through MATLAB ®