Development of a Fuel Quantity based Engine Control Unit Software Architecture

  • Samuel J. Jensen Indian Institute of Technology Madras, Chennai - 600 036
  • Pramod M. Paul Indian Institute of Technology Madras, Chennai - 600 036
  • A. Ramesh Indian Institute of Technology Madras, Chennai - 600 036
  • Anand Mammen Thomas DRDO-Research and Innovation Centre, Chennai - 600 113
  • N. S. Prasad DRDO-Combat Vehicles Research and Development Establishment, Chennai - 600 054
  • A. Kumarasamy DRDO-Combat Vehicles Research and Development Establishment, Chennai - 600 054
Keywords: ECU software architecture, Fuel quantity, Calibration

Abstract

   Conventionally diesel engines are controlled in open loop with maps based on engine speed and throttle position wherein fuel quantity is indirectly fixed using the rail pressure and injection duration maps with engine speed and throttle position as the independent variables which are measured by the respective sensors. In this work an engine control unit (ECU) software architecture where fuel quantity is directly specified in relation to the driver demand was implemented by modifying the control logic of a throttle position based framework. A desired fuel quantity for a given engine speed and throttle position was mapped from base line experiments on the reference engine. Injection durations and rail pressure required for this quantity was mapped on a fuel injector calibration test bench. The final calculation of injection duration in the new architecture is calculated using the fuel injector model. This enables determination of fuel quantity injected at any moment which directly indicates the torque produced by the engine at a given speed enabling smoke limited fuelling calculations and easing the implementation of control functions like all-speed governing.

Author Biographies

Samuel J. Jensen, Indian Institute of Technology Madras, Chennai - 600 036

Mr Samuel J. Jensen, completed his Masters in Internal Combustion Engineering from College of Engineering Guindy, Anna University Chennai in 2011. Presently pursuing his PhD from Indian Institute of Technology Madras and working on modelling combustion for Real Time model-based control of Diesel engines during steady and transient operating conditions. Research interests include: Internal combustion engine testing, data acquisition, physics-based modelling and control.

Pramod M. Paul, Indian Institute of Technology Madras, Chennai - 600 036

Mr Pramod M. Paul, completed his Bachelor’s in Mechanical Engineering at Indian Institute of Technology, Madras. Currently pursuing his Master’s in Automotive Engineering at RWTH Aachen University, Germany and also working as student worker in FEV Europe GmbH.

A. Ramesh, Indian Institute of Technology Madras, Chennai - 600 036

Dr A. Ramesh, obtained his PhD (Internal combustion engines) from IIT Madras and post doctoral research work from Ecole Des Mines De Nantes, France. He is an Institute Chair Professor of Mechanical Engineering and also head of the Center for Continuing Education in IIT Madras. He has published over 135 research papers on GDI and HCCI engines, alternative fuels and engine management.

Anand Mammen Thomas, DRDO-Research and Innovation Centre, Chennai - 600 113

Mr Anand Mammen Thomas, completed Bachelor’s in Mechanical Engineering from College of Engineering, Trivandrum, in 2007 and currently pursuing Master’s in Mechanical Engineering at IIT Madras. Presently working as Scientist `C’ in Research & Innovation Centre, IIT Madras Research Park, Chennai and is working on control strategies for a common rail direct injection armoured fighting vehicle engine.

N. S. Prasad, DRDO-Combat Vehicles Research and Development Establishment, Chennai - 600 054

Mr N.S. Prasad received his Bachelors in Mechanical Engineering from the university of Madras in 2004. Currently, he is a Scientist ‘E’ in DRDO-Combat Vehicles Research and Development Establishment, Chennai. His research is
mainly focussed on design of diesel engines for armoured fighting vehicles (AFVs) .

A. Kumarasamy, DRDO-Combat Vehicles Research and Development Establishment, Chennai - 600 054

Mr A. Kumarasamy, received his Masters from IIT Madras, Chennai in 1995. Working as Scientist `G’ in DRDO-Combat Vehicles Research and Development Establishment, Chennai and heading Engine Division.

Published
2019-04-30
How to Cite
Jensen, S., Paul, P., Ramesh, A., Thomas, A., Prasad, N., & Kumarasamy, A. (2019). Development of a Fuel Quantity based Engine Control Unit Software Architecture. Defence Science Journal, 69(3), 203-207. https://doi.org/10.14429/dsj.69.14420
Section
Special Issue Papers