Topic
Spark-ignition engine
About: Spark-ignition engine is a research topic. Over the lifetime, 4352 publications have been published within this topic receiving 66550 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the effects of turbulence on flame propagation in an engine were explored using a quasidimensional, 4-stroke, homogeneous charge, SI engine code, and the sensitivity of the model predictions to the fractal dimension, to the effect of flame stretch, and to the ratio of maximum-to-minimum flame wrinkling scales was investigated.
Abstract: Use of fractal geometry to model the effects of turbulence on flame propagation in an engine is explored using a quasidimensional, 4-stroke, homogeneous charge, SI engine code. This application of fractal geometry requires a new interpretation of the effect of turbulence on the combustion process in an engine. Specifically, flame wrinkling, rather than entrainment, is assumed to be the dominant effect of turbulence on the combustion process. Various simplifications are made in the formulation of the engine model to allow this fractal technique to be investigated as expeditiously as possible. Model predictions are compared to experimental data from an engine with an axisymmetric pancake-shaped combustion chamber. The sensitivity of the model predictions to the fractal dimension, to the effects of flame stretch, and to the ratio of maximum-to-minimum flame wrinkling scales is investigated. It is shown that the predicted initial rate of pressure rise is a strong function of the fractal dimension but...
37 citations
37 citations
36 citations
TL;DR: In this article, an adaptive estimator, based on an extended Kalman filter, is proposed for the fuel film dynamics in the intake port of a spark ignition engine, which accounts for the impingement of the injected fuel on the manifold walls and the evaporation process.
36 citations
25 Oct 1999
36 citations