Study of Knocking Characteristics in Supercharged Ultra-lean Condition in an SI Engine Under a High Compression Ratio 2018-32-0002
This study investigated the influence of EGR and spark advance on
knocking under high compression ratio, ultra-lean mixture and
supercharged condition using premium gasoline as a test fuel.
A high-compression ratio, supercharged single cylinder engine was used
in this experiment. As a result, the period from ignition to
autoignition was prolonged. In addition, knock intensity was
drastically reduced. In other words, it is inferred that by combining
an appropriate amount of EGR and spark advance, high efficiency
operation avoiding knocking can be realized.