Characteristics of the road and road surface.
Fuel consumption for transport work can be significantly reduced, while ensuring cost-efficient for specific fuel consumption in g / (hp. Kph) on basic operational modes, and good consistency of the engine to the transmission. Engine power combined with a transmission should allow long-run the engine at speed, is 85-90% of maximum.
Way affect the fuel consumption, since the rolling resistance depends on the road conditions. When driving on a road with asphalt cover the costs of power to overcome the rolling resistance of up to 20% higher than when driving on concrete.
Reduction of engine power and thus increased fuel consumption when driving on an elevated location are typically 1-2% for every 300 m above sea-level rise, and this proportion increases slightly with altitude. Ups also cause an increase in power consumption is proportional to the total mass and the speed of trains. Fuel consumption is significantly affected by the organization of movement and pomehonasy schennost-on. road.
Accessories. Modern units of an auxiliary equipment consume a significant engine power, so when choosing a motor should be aware of the energy characteristics of the most commonly used units, compressor, alternator, power steering, air conditioning unit in the cab. You should also consider the power loss in the system intake, exhaust and engine cooling. The cooling system should be linked to the construction of the car. It is advisable to use a system with automatic by-22 fan exception to avoid unnecessary high power consumption when not required forced cooling, especially for long-distance trains that operate at high speeds.
Selection of the engine and its placement on the car. You must define a rational overall engine power, based on the total weight of the production car or train and the cost of power for the accessories for typical operating conditions.