The Dynamixer - A Natural-Gas Carburettor System for Lean-Burn Vehicle Engines

A carburettor system has been designed for lean-burn heavy-duty engines to use natural gas as a fuel. The system is applied in a program of converting existing diesel buses to spark-ignition operation on natural gas. The system provides adequate air-to-fuel-ratio control, mixture homogeneity and step response. Its simplicity and ruggedness are the keys to good reliability and repeatability.