Information needed about E-CVVT cam shaft

Craig Technical Support Specialist Illinois Posted   Latest   Edited  
Discussion
Propulsion
2015 Hyundai Sonata GL 2.4L (F) 6-spd (A6MF2-1)
P0011 — "A" Camshaft Position - Timing Over-Advanced or System Performance Bank 1

diag​.​net/msg/m2yuxe2tpu…

Hello to all, I presently have this vehicle in the shop with what appears to be an issue with the E-CVVT. I have removed the front cover and found one of the brushes to have a rather angular wear pattern, the actuator ring contacts are grooved but no burnt spots or oil present. I don't see damage like was found in the post referenced above. Is it possible to just get by with changing the brushes? And does anyone have information as to how this thing really works internally? The repair is quoted with a new E-CVVT actuator, cover, and brushes as the dealer states that they are experiencing issues. I really am just trying to better understand how this thing works.

Thanks

Craig

0
James Instructor
New Jersey
James Default
 

Craig, OEM sells brushes with cover as an assembly. There are also 2 internal brushs that you cant see or get to. You have to replace ecvvt. If they are bad. It's just a bi- directional DC motor instead of a hydraulic setup. You should have continuity through the motor from the external slip rings. If the rings are grooved that's a problem waiting to get worse and it'll be back. There is a…

0
Default Ð Awarded
Craig Technical Support Specialist
Illinois
Craig Default
 

James, thanks for the information about a second set of brushes inside the actuator. What I really want to know is what's behind the motor, the only mechanism that I can fathom would be a planetary gearbox being used to speed up or advance the cam or slowing to retard timing. I have found a diagram showing the mechanism internals but it grainy and hard to tell what's there. Thanks for any…

0
Default Ð Awarded
James Instructor
New Jersey
James Default
 

Craig, there are physical stops to prevent camshaft from going beyond its full Retard/Advance positions. An electric motor controls/moves/holds position. Speed reduction is through a cycloidal drive mechanism(works like a planetary set). The motor armature rotates an eccentric shaft which operates the speed reduction section. Here is a link to a generic animation to help you to visualize…

0
Default Ð Awarded
Craig Technical Support Specialist
Illinois
Craig Default
 

James, that's what I was looking for thank you. Now I can sleep a little better tonight!

0
Default Ð Awarded
James Instructor
New Jersey
James Default
 

Glad I could help. Anytime.

0
Default Ð Awarded
Caleb Diagnostician
Indiana
Caleb Default
   

Hey Craig take a look at this link . I had this same code on a 16 Sonata. I did a little research and provided known good cam and crank waveforms. diag​.​net/msg/m2yuxe2tpu…

0
Default Ð Awarded
Craig Technical Support Specialist
Illinois
Craig Default
 

Caleb, I believe the link was posted above anyway thanks for the information because this things new to me as well.

0
Default Ð Awarded