C7 Engines for Caterpillar Built Machines Caterpillar


General Information

Usage:

525C 525



图 1g01135146

右视图

(1) 机油油位表

(2) 吊耳

(3) 机油加注口盖

(4) 排气歧管

(5) 交流发电机

(6) 水温调节器壳体

(7) 加热器软管连接

(8) 起动马达

(9) 涡轮增压器

(10) 远程机油滤清器底座

(11) 水泵

(12) 曲轴减振器




图 2g01135148

左视图

(13) 燃油滤清器

(14) 单体喷油器液压泵

(15) 进气加热器继电器

(16) 发动机曲轴箱呼吸器

(17) 进气弯头

(18) 电子控制模块(ECM)

发动机为直列式六缸发动机。 发动机的点火顺序为 1-5-3-6-2-4。 当从飞轮端观看发动机时,发动机的转向为逆时针。 发动机采用涡轮增压器和空冷后冷器。 发动机的缸径为 110 mm (4.3 in),冲程为 127 mm (5.0 in)。 排量为 7.2 L (440 cu in)。

液压电子式单体喷油器(HEUI)燃油系统系统淘汰了油泵管路系统中的一些机械零部件。 HEUI 燃油系统也可加强对正时和燃油空气混合的控制。 通过精确控制单体喷油器正时获得正时提前。 发动机转速由调整喷油持续时间来控制。 通过特殊的脉冲轮为发动机控制模块(ECM)提供信息检测气缸位置和发动机转速。

发动机具有内置诊断,以便确保所有部件正常工作。 如果系统部件出现故障,可以通过仪表板上的检查发动机指示灯提醒操作员这个状况。 电子维修工具可用于读取出针对有故障的部件或状况的数字编码。

起动发动机

发动机 ECM 将自动提供起动发动机所需的正确燃油量。 盘车起动发动机时不要踩下油门。 如果发动机 20 秒内没有起动,应松开起动开关。 再次使用起动马达之前,让起动马达先冷却两分钟。


注意

过量使用乙醚会造成活塞和活塞环损坏。 只在寒冷天气起动时才使用乙醚。


冷起动模式操作

寒冷天气发动机的起动和运转性能取决于燃油类型、机油粘度和其它选装的起动辅助装置。 关于更多信息,请参阅操作和保养手册, "冷天运行"。

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