Air Inlet and Exhaust System Operation
进排气系统的部件控制用于燃烧的空气的质量和数量。 有四个独立涡轮增压器。 排气歧管处于发动机的 V 形中。 缸体中有一个凸轮轴。 凸轮轴控制气门系统部件的移动。
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(1) 排气歧管
(2) 进气口 (3) 涡轮增压器压气机叶轮 (4) 涡轮增压器涡轮机 (5) 废气出口 (6) 后冷器 (7) 空气管 | |
来自空气滤清器的清洁进气经由进气口 (2) 被涡轮增压器压缩机叶轮 (3) 吸入涡轮增压器压缩机内。 涡轮增压器压缩机叶轮的旋转进而将空气经由一个气管推向后冷器 (7)。 在空气流入每一个缸盖内的进气室之前，后冷器会降低这些被压缩的空气的温度。 这些被冷却和压缩的空气充满了缸盖内的进气室。 从进气室流入气缸的空气是由进气门来控制的。
每一缸都有两个进气门和两个排气门。 请参阅系统操作, "气门机构"。 在进气冲程活塞向下移动时，进气门打开。 被冷却和压缩的空气就被从进气室吸入气缸。
压缩冲程时进气门关闭，活塞开始向上移动。 当活塞快到压缩冲程上止点时，燃油被喷入气缸。 燃油与空气混合，开始燃烧。 燃烧所产生的力在作功冲程时向下推动活塞。 当活塞再次向上移动时，活塞处于排气冲程。 排气阀打开，排气经由排气口被压入排气歧管 (1)。 活塞完成排气冲程之后，排气阀关闭，循环再次开始。
排气从排气歧管 (1) 进入涡轮增压器的涡轮机侧。 这些排气使得涡轮机叶轮 (4) 旋转。 涡轮机叶轮与驱动涡轮增压器上端压缩机叶轮 (3) 的轴相连。 排气经由排气口 (5) 排出。
Caterpillar Information System:
C175 Oil&Gas Offshore Engine Sensor (Data Link Type) - Test
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