Journal of the korean Society of Automotive Engineers (오토저널)
- Volume 15 Issue 1
- /
- Pages.67-72
- /
- 1993
- /
- 1739-4791(pISSN)
Effects of injector on the A/F variations during acceleration and deceleration
Injector에 따른 가.감속시 공연비 변동에 관하여
Abstract
Wall wetting phenomenon in the intake port of an MPI engine was investigated with different kinds of injectors by an A/F step response test and analysis was done based on the simple wall wetting model to find out a certain correlation between wall wetting and A/F variations. It was found that (1) At fully warmed condition of 90.deg.C water temperature, around 40-60% of injected fuel was wall wetted, (2) At cold condition of 45.deg.C Water temperature, around 68-80% of injected fuel was wall wetted, and (3) A/F variations during acceleration and deceleration were influenced by the wetting area, the fuel droplet size, and the amount of wall wetting fuel.