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

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2014-SHAV-66737
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.

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.

Advantages
-Reduction in fuel consumption and emissions
-Dynamic surface control scheme minimizes computational effort

Potential Applications:
-Automobile industry
Aug 1, 2014
Utility Patent
United States
9,562,487
Feb 7, 2017
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