產品概述：

    東風4B型客運機車是交一直流電力傳動內燃機車。機車可滿足氣溫在-40℃～40℃
、長大隧道
、多風砂地區等條件下的運用要求。機車車體為框架式承載
，設置雙司機室；采用兩台可互換的三軸
、無心盤軸箱拉杆式轉向架，牽引力及製動力的傳遞采用低位牽引杆機構；製動機型號為JZ-7型。

主要技術參數：

                                      標稱功率（kW）                                                1985kW

                                      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

                                      電阻製動功率（kW）                                             ≥2490kW

                                      牽引齒輪傳動比                                                 71:21

                                      最大運用速度（km/h）                                            120

                                      持續速度（km/h）                                                29.3

                                      最大起動牽引力（kN ）                                           345

                                      持續牽引力（kN ）                                               230

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