Abstract
This study focuses on the effect of the compression ratio on the in-cylinder deposit formation of a diesel engine fueled with straight vegetable oil (SVO). Two-dimensional thickness distributions of the carbon deposits on the cylinder head wall were measured by a laser displacement meter after continuous operation for 4 hours. The experiment result shows that a lot of carbon accumulated along the injection directions especially in the case of low compression ratio. Also, it was shown that the higher compression ratio, the lower the deposit accumulation is.
