Cam drive noise reduction

[ivymike]

Would anybody be able give me some information on techniques used to reduce noise in cam drive systems, especially "nodal" gear drive systems? Textbook references, SAE paper references, firsthand knowledge, websites, etc., would be appreciated.

 

[ads22]

FWIW - probably not much - my 1974 Mercury (ie Ford) Capri 2.8 V6 had a helical gear drive to the cam. It was a phenolic plastic gear with a metal center. I found this out when the phenolic part disintegrated abruptly one day at maybe 75,000 miles. No warning noise or erratic running, just suddenly stopped running. Replacement was metallic, can't remember what kind of metal. Both phenolic and replacement metal gears gave very quiet service with nothing fancy in the way of backlash elimination. Probably had very light valve springs and shallow lift ramps so oscillating loads were moderate.

 

[patprimmer]

Rob45

Are you suggesting that it is impossible to design a durable idler gear for a cam drive in nylon.

Do you suggest the same for reinforced thermosets such as wood and cotton reinforced phenolic.

Have you ever seen or heard of a metal cam drive gear failing.

Do used oil filters normally contain debris, and what is the typical makeup of this debris.

Regards
pat pprimmer@acay.com.au
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