In-Cycle Closed Loop Control Of The Fuel Injection On A 1-Cylinder Heavy Duty Ci-Engine

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


The focus of this article is on implementation of real time combustion control by using an FPGA. The feedback used for the controller is the heat release. Due to the desire to avoid using division on the FPGA an alternative way of calculating the polytropic exponent is investigated. When this method is compared against using a constant exponent it shows less fluctuations in regards to cycle to cycle variations when calculating the heat release. A dual injection strategy is used and real time control is implemented on the second fuel injection. The calculated heat release is continuously compared with a reference and then the difference is converted to a duration correction of the filet injection. This is done by a proportional controller which is initiated after the start of the second injection. By adding a perturbation on the first fuel injection the controller is shown to compensate during the second and thereby decreasing the cycle to cycle variations.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Mechanical Engineering
Original languageEnglish
Title of host publicationProceedings of the ASME Internal Combustion Engine Division Fall Technical Conference
PublisherAmerican Society Of Mechanical Engineers (ASME)
ISBN (Print)978-0-7918-4944-6
Publication statusPublished - 2010
Publication categoryResearch
EventFall Technical Conference of the ASME Internal Combustion Engine Division, 2010 - San Antonio, TX, San Antonio, TX, United States
Duration: 2010 Sep 122010 Sep 15


ConferenceFall Technical Conference of the ASME Internal Combustion Engine Division, 2010
CountryUnited States
CitySan Antonio, TX