The performance characteristics of an engine called a load, it is when the engine speed is constant, the economic index of the variation of effective specific fuel oil consumption with engine load. Using the change curve, most comprehensively determine the engine load and speed of the economy.
In front of the load characteristics, we must first know what effective specific fuel oil consumption.
Measuring automobile fuel consumption car for general use at a given speed depending on how much the actual fuel consumption of 100 kilometers (l) calculations. Such as cars on the technical parameters of common "90 km/h speed" 100 km fuel consumption parameter when this economic indicator is a measure of the car. Measuring engine of economic indicators, an index for the engineering and technical personnel with effective specific fuel oil consumption, fuel consumption for short, GE said that it refers to units per hour effective power consumption of fuel, unit is g/kW.h.