Improving the Efficiency and Environmental Friendliness of Diesel Engines of Mining Dump Trucks by Installing Hybrid Gas-Diesel Fuel Systems

The volume of environmental pollution has reached critical values. Industrial transport plays a huge negative role in pollution, especially mining dump trucks that operate whole day on diesel fuel. The cost of diesel fuel in Kazakhstan has more than doubled over the past few years, which, in turn, affected the cost of raw materials for the mining and processing and metallurgical industries. The objective of the research was a development of hybrid gas-and-diesel fuel system to transfer the diesel engines operation into the gas-and-diesel mode with replacement of some part of the diesel fuel by natural gas. The advantages of the developed hybrid gas-and-diesel fuel systems are as follows: the replaced amount of diesel fuel by the natural gas is up to 70%; converting simplicity and fastness; engineering or technological modifications of a basic diesel model are not required; the engine becomes universal for operation with liquid or gaseous fuel; both cycles, gas-and diesel and diesel operation possibility is maintained; the power parameters of a diesel engine operation remain at the documented level; exhaust smoke capacity is reduced by 2–3 times; the unit cost of cargo transportation is significantly reduced.