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Within-A-Cycle Control of Rate Shaping with Piezoelectric Fuel Injectors

Summary: Researchers at Purdue University have developed a model-based, closed-loop controller of injection flow rate for a piezoelectric fuel injectors. This within-a-cycle control strategy utilizes a model-based, generalizable scheme and shows an injection flow rate tracking capability. The performance of this controller has been verified with simulation and experimental results at different rail pressures and desired injection rates, which indicate a maximum error of total fuel per one injection event of 2.5 percent.

Technology Benefits: Reduction in fuel consumption and emissions Dynamic surface control scheme minimizes computational effort

Technology Application: Automobile industry

Detailed Technology Description: Greg ShaverPurdue Mechanical Engineering

Countries: United States

Application No.: None

*Abstract

*Background: Fuel injection rate shaping is a strategy to improve fuel efficiency and reduce harmful emissions in diesel engines. Thanks to their fast response, piezoelectric fuel injectors are capable of rate shaping.

*IP Issue Date: None

*IP Type: Utility

*Stage of Development: Prototype testing validated

*Web Links: Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipGreg ShaverPurdue Mechanical Engineering

Country/Region: USA

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