Turbocharger
涡轮增压器的涡轮侧与相应的排气歧管相连。 各涡轮增压器的压气机侧则通过管道与后冷器壳体的顶部相连。
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| 图 1 | g00281664 |
涡轮增压器（典型图例） (1) 压气机叶轮 (2) 轴承 (3) 进油口 (4) 轴承 (5) 涡轮叶轮 (6) 排气口 (7) 进气口 (8) 冷却液通道 (9) 出油口 (10) 排气进口 | |
排气进入涡轮壳体的排气进口 (10) 时， 会推动涡轮叶轮 (5) 的叶片。 涡轮叶轮和压气机叶轮的转速达 90000 转/分。
在压气机叶轮 (1) 的旋转作用下，由空气滤清器过滤后的清洁空气被吸入进气口 (7) 。 压气机叶轮通过叶片的转动压缩进气。 压缩空气可使发动机的燃烧更充分，从而提高燃油效率。
涡轮增压器的最大转速由发动机的燃油输送电子控制装置进行控制。 发动机运转时，所处的海拔高度也会影响涡轮增压器的最大转速。
涡轮增压器的轴承 (2) 和轴承 (4) 使用增压的发动机机油进行润滑。 机油从进油管输送到顶部的进油口 (3) 。 然后流经涡轮增压器的中段油道，润滑涡轮增压器轴承。 最后，机油从底部的出油口 (9) 流出， 并通过排油管流回发动机缸体内。
另外，涡轮增压器的轴承套由水套水冷却液冷却。 冷却液从冷却液进液管进入涡轮增压器中段的一侧， 流经轴承套内的冷却液通道 (8) ， 然后从中段另一侧流出涡轮增压器。 最后，冷却液沿冷却液出液管流回水套水散热器的顶部冷却液箱。
Caterpillar Information System:
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2000/08/28 Correction to Service Manual , "Speedometer/Tachometer Module" {7450}
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