Abstract
This paper presents modeling of ignition timing and air to fuel ratio control parameters for maximum brake torque based on the extensive experiments tuning data of a Toyota Corolla 4 cylinder, 1.8l hydrogen powered car. The power train optimization techniques via statistical engine analysis using two stages modeling and calibration generation are carried out. The complete optimization techniques included various ignition timing, hydrogen air to fuel ratio, load (throttle position) and engine speed have been constructed, in which the air to fuel ratio, load and engine speed are chosen as global input, and ignition advance is selected as local input of two stages model. Subsequently, the inherited calibration generation from two stages model is investigated. Then, two matching control tables of ignition timing and air to fuel ratio are created. The tuning results have shown that the minimum ignition advance with appropriate hydrogen air to fuel ratio for maximum brake torques were achieved. This work is a step towards establishing modeling of ignition advance and air to fuel ratio via application of advanced power train techniques while saving time, money and limiting damage for innovative hydrogen internal combustion engine in early design tuning process.
Keywords: Performance optimization, hydrogen powered car, ignition timing, two stages modeling, hydrogen engine tuning, hydrogen air to fuel ratio.