Experimental Investigation of Embedded Controlled Diesel Engine

Diesel engines are widely used in Automobiles, Agriculture and Power generation sectors in a large scale. The modern techniques have contributed a lot in the saving of fuel in these diesel engines. However, from 1970 onwards the fuel consumption becomes a serious concern because of a manifold increase of automobiles and fast depletion of non renewable sources of energy. Since the fuel injection system plays a major role in the consumption of fuel in diesel engines, various control measures were tried in the past. The advancement in electronics and measurement technologies has led to substantial improvement of engine fuel-injection control systems, both in hardware configuration and in control methodology. This paper presents embedded control design and experimental results of the fuel injection control system of a single cylinder direct injection diesel engine. Here, the electronic fuel injector is controlled by PIC microcontroller using the signals received from air velocity sensor, load sensor, exhaust temperature sensor, crankshaft position sensor and speed sensor. The performance of the electronic fuel injection system is compared with that of a mechanical fuel injection system and fuel consumption characteristics are studied. The results show that the electronic injection system improves SFC, TFC, ME, ITE, and BTE substantially.