مقايسه مقدار نفوذ سوخت ديزل پورخوران محدود و موتور تنفس طبيعي OM314 كاميونت خاور LP608 در شرايط بار جاده

Comparison of the Fuel Spray Penetration of OM314 Naturally Aspirated Engine with the OM314 LIMP Turbocharged Diesel Engine of LP608 Lorry in Road Load Conditions

The main goal of this research is to compare the fuel spray penetr ation of a natur ally aspirated engine with the same turb ocharged diesel engine in road load conditions, both experimentally and theoretically. In the experimental part , a lorry with a naturall y aspirated OM3l4 diesel engin e has been utili zed in road test und er the different operational conditions for determining the road load power. Then in the diesel laboratory, a naturally aspirated OM314 diesel engi ne and a LIMP turb ocharged OM314 diesel engine has been tested under the road load conditions to measure the required parameters. In the theoretical part, we have developed a new parameter based on the Den t corr elation and the ideal diesel cycle , which is ca lled fue l spray pen etration (FSP) ratio. This parameter calculates the fuel spray pen etration in a turb ocharged diesel engine in comparison with the same naturally aspirated diesel engine. By means of the experimenta l data, FSP ratio has been calculated for different operational condition s. Results show that while the gauge inlet mani fold pr essure is 0.2 bar, the injection pressure should be incr eased by 50 bar to compensate for the increased cylinder pressure due to turbo-charging. Also the optimum fuel injection pressure has been investigated by the ECE-R49 standard test. Experimenta l result s show that when the injection pressure reaches to 250 bar, soot emission reduces around %16.