Localization of a pump means Choke First, we have to import the original BB1-6 engine fuel injector and fuel pump assembly for structural analysis and determination of its performance parameters as the original basis. Then based on actual usage conditions and often need repair replacement wearing parts, the initial set of components and the implementation of domestic structure and performance parameters, and the domestic oil industry has been conducting an investigation Choke, matching performance characteristics of the structure and parameters of similar maturity product components. No mature product for the domestic part of components, such as filling valve counterpart, special seals, and other specifications to the January 1 implementation of national professional factory custom. For part of a summary of the components, taking into account the relatively high processing costs, we have to conduct its own mapping and production, then these final selection, customization and self-made parts and components to consolidate, reassembly. Secondly, in order to make the domestic injector and fuel pump assembly structure, the main performance parameters consistent with the original assembly, in accordance with the following principles of the General Armament Department and restructuring: 1) Localization of the injector and fuel pump assembly in the engine installed on location, size and operating methods for connecting to and imports original pieces of the same, to repair the whole process of exchange will not be affected assembly requirements. 2) Localization of the injector and fuel pump assembly, the main consumable parts to original pieces and imports in line to the process of repairing the main vulnerability of the exchange will not be affected. 3) Domestic mouth of the pump, supply performance and speed performance requirements and imported original pieces consistent to ensure that the use of forklift trucks. 2 fuel pump assembly of the Performance Comparison Test To make Chinese-made parts are assembled into the fuel pump assembly to replace imported original pump, fuel pump test stand in a comprehensive performance tuning, adjusted to the main performance parameters of the original equipment factory under the technical requirements. Comparison of the performance test are as follows: 1) fuel pump structure and main technical parameters of performance comparison tests. Structure and main technical performance parameters are: fuel pump and the governor the structural type, fuel injection sequence, plunger supply pre-trip injection interval angle.