Fuel Injector Anatomy
12-29-15, 08:36 PM
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daveD
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Fuel Injector Anatomy
I always want to know what makes things tick....so I "disassembled" a spare injector (from an '86). Just a picture for now...
I have HD videos....but no idea how to post. I'm not too swift on the computer...perhaps someone can chime in and give me a clue...
The Injector internals are VERY accurately ground and lapped! The armature is attracted by the solenoid coil wrapped around the body....and the spring returns the tapered part of the armature ( the bit with the pintle on the end) to the valve seat when the electrical pulse is removed.
There are no service parts inside. All that can be done is chemical cleaning...and the very fine inlet filter changed. Matching flows can only be done by selection! (Or shear luck!)
The valve seat part is sealed with an O-ring as the body is 'rolled' to seal the lot together...I presume because of the distortion this may cause.
Dave
I have HD videos....but no idea how to post. I'm not too swift on the computer...perhaps someone can chime in and give me a clue...
The Injector internals are VERY accurately ground and lapped! The armature is attracted by the solenoid coil wrapped around the body....and the spring returns the tapered part of the armature ( the bit with the pintle on the end) to the valve seat when the electrical pulse is removed.
There are no service parts inside. All that can be done is chemical cleaning...and the very fine inlet filter changed. Matching flows can only be done by selection! (Or shear luck!)
The valve seat part is sealed with an O-ring as the body is 'rolled' to seal the lot together...I presume because of the distortion this may cause.
Dave
Last edited by daveD; 12-29-15 at 08:39 PM. Reason: Add comment about O-ring
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