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Technology: Patented, Exhaust Expander System CREEV

Technology: Patented, Exhaust Expander System CREEV

Technology: Patented, Exhaust Expander System CREEV

Product catalog summary
Introduction
Rotary engines are advantageous for range extenders, series hybrid electric vehicles (S-HEV), and power generation due to their compact size, low weight, low vibration, and high power density. However, their historical use has been limited by high exhaust energy, heat, and emissions, especially at low RPM and partial throttle.
Technological Advancements
The introduction of the Compound Rotary Engine for Electric Vehicles (CREEV) addresses these limitations. The CREEV system reduces engine noise and heat by expanding exhaust gases to near atmospheric pressure before release. It also acts as an exhaust reactor, reducing emissions of hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) by consuming unburned exhaust products. Additionally, the system improves thermal efficiency by up to 20% by recapturing exhaust energy.
Application in Series Hybrid Vehicles
When integrating an internal combustion engine into an electric vehicle as a generator in a series hybrid range extender configuration, factors such as packaging volume, weight, efficiency, noise, and vibration must be considered. The typical duty cycle involves the engine being off or operating at high RPM and load, necessitating quiet and vibration-free operation during transitions. The AIE single-rotor Wankel IC rotary engine, with SPARCS and CREEV technologies, is ideal for this application, leveraging its compact size, low weight, and low vibration levels.
Performance and Efficiency
AIE's rotary-engine series hybrid solutions are significantly lighter and smaller than traditional reciprocating engine units, offering improved packaging and enhanced performance. These engines weigh less than 40% of existing units and are up to 50% smaller, making them highly efficient for series hybrid applications.
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Catalog excerpts

Technology: Patented, Exhaust Expander System CREEV-1

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Technology: Patented, Exhaust Expander System CREEV-2

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 Open the catalog to page 2
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