Optimization Design Of Fuel Injection System For Shuohuang Railway Shunting Locomotive

Since the internal combustion engine shunting locomotive is in standby mode for most of the working hours,the diesel engine is in a low speed or idle speed for a long time,and the locomotive will cause unnecessary fuel consumption in the idle state.At the same time,the long-term use of the shunting locomotive in the low speed or idle state will inevitably cause the fuel injected into the cylinder of the diesel engine not to be fully burned,so that the accumulated fuel flows to the diesel oil sump,causing the oil to be diluted.Moreover,the shunting locomotive has a long use time,and it is difficult to find a fault,so that the problem continues to be the inertia fault of the shunting locomotive.This paper takes the Shuohuang railway shunting locomotive as the research object.According to its application characteristics,it is pointed out that the injection system of the main locomotive of the shunting locomotive will cause a series of problems such as unnecessary fuel consumption,insufficient combustion and oil dilution,so it needs to be shunted.Based on the theoretical calculation method,a new fuel-discharging system for shunting locomotives was initially designed,and then the GT-FUEL simulation module in GT-SUITE software was used to optimize the fuel injection system.Finally,the optimization scheme of the fuel injection system of the shunting locomotive is tested.The results show that under most working conditions,the fuel consumption index has different degrees of decline,and up to 8.5g/kW·h can be reduced under one condition.At the same time,such a design is also conducive to the full combustion of fuel,the failure of various types of locomotive caused by oil dilution will be greatly reduced.