Valve material - Hydrogen ICE
Valve material - Hydrogen ICE
(OP)
I've done a bit of web searching for wear data for hydrogen fueled ICE poppet valve and valve seat inserts. I am primarily interested in various material combinations. Most of what I have found has been anecdotal. I suspect that quantified wear data is closely guarded, but I'd like to ask the question anyone. Does anyone have sharable data regarding valve and valve seat insert wear for hydrogen fueled spark ignition ICE considering various valve and VSI material combinations?





RE: Valve material - Hydrogen ICE
RE: Valve material - Hydrogen ICE
As far as I know, engines running on propane or natural gas don't have any unusual valve wear circumstances. If anything, the lessened carbon fouling is a change in a favourable direction.
RE: Valve material - Hydrogen ICE
BrianPetersen
The valves on engines that I have seen that run only on LPG
go quite rusty.
A tidy mind not intelligent as it ignors the random opportunities of total chaos. Thats my excuse anyway
Malbeare
www.sixstroke.com
RE: Valve material - Hydrogen ICE
However, we have heard anecdotal info that suggests that carbon residue from the combustion of LPG and CNG, minimal as it may be, still provides some lubricity that benefits the valve and seat interface with respect to wear.
The work that we are doing is testing with hydrogen fuel a port injected engine designed to burn gasoline, and we are experiencing excessive valve recession over time. With original valve ans seat materials, valve clearance set originally to nominal is below minimum limit after only 300 hours of operation on a dyno (this engine has no hydraulic lash adjustment).
RE: Valve material - Hydrogen ICE
Stainless alloys should be fine, unless you're running high levels of boost. Then I'd recommend Inconel on the exhaust.
Typical stainless intake valve alloys would be martensitic alloys such as 422. Stainless exhaust valve alloys are typically iron based such as 21-4N. Inconel exhaust alloys are usually Nickle based such as Inconel 751 or Nimonic 80/90.
For valve seats, you can't beat Stellite. I think you can get Stellite seats through Martin-Wells:
http://www.martinwellsco.com
Good Luck!