What causes a diesel to run rich?
What causes a diesel to run rich? a diesel obviously has to run rich, because engine speed is controlled with fuel.. a diesel obviously has to run rich, because engine speed is controlled with fuel.. Actually, the Diesel cycle operates with an excess of air... What is the air fuel ratio for a diesel engine? 14.5:1 The reason for this is the working principle of a diesel engine: controlling load not through air mass (which is always in excess) but through fuel mass (injection time). Remember that a stoichiometric equivalence factor (λ = 1.00) means an air-fuel ratio of 14.7:1...