產品概述：

   東風4B型內燃機車是交一直流電力傳動幹線客、貨兩用內燃機車。機車可滿足氣溫-40℃～40℃
、長大隧道

、多風砂等條件下的運用要求。機車標稱功率為1985kW，柴油機最大運用功率為2430kw。客運和貨運兩種車型最主要區別為牽引齒輪傳動比和牽引電動機功率不同，除此之外，兩種車型結構基本相同。

主要技術參數：

                                          標稱功率（kW）                                                           1985

                                          軸式                                                                     Co－Co

                                          輪徑（mm）                                                               1050

                                          軸重（t）                                                                23±3％

                                          機車整備重量（t）                                                        138±3％

                                          燃油箱容積（L）                                                          9000

                                          機油儲備量（kg）                                                         1200

                                          冷卻水儲備量（kg）                                                       1200

                                          砂儲備量（kg）                                                           800

                                          通過最小曲線半徑（m）                                                    145

                                          電阻製動的輪周功率（kW）                                                 ≥2206kW

                                          牽引齒輪傳動比                                                           63:14

                                          最大運用速度（km/h）                                                     100

                                          持續速度（km/h）                                                         21.6

                                          最大起動牽引力（kN）                                                     435

                                          持續牽引力（kN）                                                         324

                                          機車外形尺寸（長×寬×高）（mm）                                         21100×3309×4755