Abstract
Internal combustion engines are required to use various fuels. A conventional MAP based engine control system is not suitable for achieving stable operation and high thermal efficient operation for various fuels. Authors have been developing the engine control algorithm to realize fuel flexibility by employing experimental rules and a closed loop control using in-cylinder gas pressure. In this study, in order to improve fuel flexibility of engine control algorithm and to confirm the experimental rules, availability of calculation results with elementary reactions for the algorithm is investigated. Availability of instant crank shaft torque for a feedback sensor is also investigated. The result shows that the modified engine control system employing laminar burning velocities calculated from elementary reactions and the torque feedback loop can keep stable operation when fuel lower heating value varies during engine operation.
