actuator question

[2.2 Straight six]

until 5 mins ago when i read the turbos 101 i thought i knew about turbos, obviously not. but one thing i never knew is what is an actuator. i've seen them but what do they do, whats their purpose ? can you guys please explain?

thanks,
chris

[nissanfanatic]

Its the cylidrical piece on a internally wastegated turbo that sits long-ways on the turbo. It has a hose running from a tap on the compressor housing to the cylinder. It then has a rod coming out of the end of it connected to the flapper on the turbine housing. When boost is present, at a preset boost level, the actuator opens the wastegate flapper allowing exhaust to bypass the turbine impeller. It just controls(or activates) the wastegate flapper.

[2.2 Straight six]

so its like an "internal wastegate" ?

[v-tec]

Originally Posted by 2.2 Straight six

so its like an "internal wastegate" ?

along the same lines. yes