Model-based control of diesel engines with multiple fuel injections

Yudai Yamasaki, Ryosuke Ikemura, Shigehiko Kaneko

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We developed a feed-forward controller for a conventional diesel combustion engine with triple fuel injection and experimentally evaluated its performance. A combustion model that discretizes an engine cycle into a number of representative points to achieve a light calculation load is embedded into the controller; this model predicts the in-cylinder gas-pressure-peak timing with information about the operating condition obtained from the engine control unit. The controller calculates the optimal main-fuel-injection timing to control the in-cylinder gas-pressure peak using the prediction result as a controller with a single input and output. The controller’s performance was evaluated by experiments using a four-cylinder diesel engine under changing the target value of the in-cylinder gas-pressure-peak timing during a target-following test and the performance was also evaluated under changing the exhaust gas recirculation ratio at the constant target value of the in-cylinder gas-pressure-peak timing for the disturbance-response test. It was found that the controller could calculate the optimal main-injection timing over a cycle and maintain the targeted in-cylinder gas-pressure-peak timing even when the target value or exhaust gas recirculation changed. The combustion model was also shown to be fast enough at predicting diesel combustion for onboard control.

Original languageEnglish
Pages (from-to)257-265
Number of pages9
JournalInternational Journal of Engine Research
Volume19
Issue number2
DOIs
Publication statusPublished - 2018 Feb 1
Externally publishedYes

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Keywords

  • combustion model
  • Diesel engine
  • feed-forward controller
  • model-based control
  • multiple fuel injection

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering

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