Determination of the optimal air-fuel ratio for upgraded biogas engine operation

The paper reveals a study about air-fuel ratio variation of spark-ignition engine running on upgraded biogas (biomethane). Using as internal combustion fuel and external mixture formation is new approach to decrease harmful exhaust gas emissions. Тo obtain minimum concentrations gases emissions the must work with optimal ratio. This research contains analysis many test adjusting characteristics determine for each working regime maximum effective process by use biomethane fuel. Three-dimensional graphics across rpm load range were made. In conclusion based performed experiments, table values all operating modes dependence proposed.