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１概述为使柴油机在最佳的润滑状态下工作，对东风４Ｂ型机车规定了主机油泵的出口压力在５．５＋１．４ｋｇｆ／ｃｍ２（１ｋｇｆ／ｃｍ２＝９．８０６６５×１０４Ｐａ）范围内，主机油泵出口压力低于或高于此范围，对柴油机工作都是不利的。同时，在结构方面，为了提高主机?
1 Overview In order to make the diesel engine work in the best lubrication condition, the DF4B locomotive specifies the outlet pressure of the main pump within the range of 5.5 + 1.4kgf / cm2 (1kgf / cm2 = 9.80665 × 104Pa) Export pressure below or above this range, the work of diesel are adverse. At the same time, in terms of structure, in order to improve the host?