The Influence of an Ignition Accelerator on the Ignition Quality and Anti-Knock Properties of Light Hydrocarbons in the Diesel Engine

Based upon the standard cetane method and the BASF test engine commonly used in Germany a test method was developed which enables the low cetane numbers of commercial gasolines and light hydrocarbons to be measured. By means of this modified cetane test method systematic investigations were made into pure hydrocarbons of different chemical structure, some gasoline stocks and commercial gasolines. The effects on cetane number increasing by the ignition improver cyclohexanolnitrate were investigated. The octane number decrease which is automatically combined with the cetane number increase was also tested, because an optimum of cetane number increase and octane number decrease might be desirable.