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Increase Fuel Efficiency with Direct Fuel Injection System Design

Technology #20130097

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Direct Fuel Injection SystemIncrease Engine EfficiencyImprove Fuel Economy
Zongxuan Sun,PhD
Department of Mechanical Engineering, School of Science and Engineering
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Kevin Nickels
Technology Licensing Officer 612-625-7289
Patent Protection

PCT Patent Application WO2014107487
US Patent 9719474
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Direct Fuel Injection Design Term Sheet [PDF]

Direct Fuel Injection System Increases Engine Efficiency

The direct fuel injection system design incorporates a fuel injection assembly to deliver continuously variable injection flow rate by controlling the injector needle position. An iterative learning control feedback circuit controller is utilized to provide the optimum fuel injection rate at all times. This increases the fuel combustion efficiency and leads to improved fuel economy.

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Improve Fuel Economy and Reduce Engine Emissions

The most common method of fuel injection currently uses multiple injection; the described invention overcomes the injection quality inconsistency caused by the conventional system. By controlling the position of the needle the design can deliver a continuous variable injection flow rate, which can increase engine performance, improve fuel efficiency and reduce emissions.


  • The iterative learning control corrects the injection flow rate cycle by cycle, leading to optimum fuel injection.
  • Optimum fuel injection can increase engine efficiency, improve fuel economy and reduce emissions.
  • Lower emissions lead to a more environmentally friendly engine.