Influence of Mixture Quality on Homogeneous Charge Compression Ignition
The major advantages with Homogeneous Charge Compression Ignition, HCCI, is high efficiency in combination with low NOx emissions. The major drawback with HCCI is the problem to control the ignition timing over a wide load and speed range. Other drawbacks are the limitation in attainable IMEP and relatively high emissions of unburned hydrocarbons. But the use of Exhaust Gas Recycling (EGR) instead