Simulations using CFD and chemical kinetics models have been applied to gain a better understanding of the effect of the recirculated gases on the autoignition process during cold starting of a direct injection diesel engine. The cranking gases recirculated (CGR) contain fuel vapor and partial oxidation products which affect the autoignition process in different ways. Some hydrocarbons (HCs) species enhance the reaction rates and reduce ignition delay. Meanwhile other HCs species and the partial oxidation products of the autoignition process have an opposing effect. The simulation covered a wide range of the hydrocarbons and aldehydes concentrations and their effect on the ignition delay in a 1.2L Ford DIATA 4-cylinders, water cooled, turbocharged and intercooled diesel engine. The simulated opposing effects of HCs and HCHO on the ignition delay are validated by experimental results at room temperature.
Simulation of the Effect of Recirculated Gases on Ignition Delay During Cold Starting of a Direct Injection Diesel Engine
Sae Technical Papers
SAE 2011 World Congress & Exhibition ; 2011
2011-04-12
Conference paper
English
Automotive engineering | 2011
|Diesel Engine Cold Starting with Catalytically Ignited Recirculated Exhaust Gas
SAE Technical Papers | 1994
|Diesel engine cold starting with catalytically ignited recirculated exhaust gas
Automotive engineering | 1994
|Opposing effects of recirculated gases during cranking on cold start of diesel engines
Online Contents | 2011
|Opposing effects of recirculated gases during cranking on cold start of diesel engines
Automotive engineering | 2011
|