Hey Lads,

Thoes of you that get inside the S2000 engine know that the camshafts are driven by a scissors gear. The thing is that this scissors system implented by Honda allows the relative phasing of the camshafts to change relative to each other. And just to make things interesting its an automatic system in that it continuously changes the camshaft phasing dynamically.

Well this is all very nice but does any one know the relationship between the camshaft phasing and RPM. As the system only operates while the engine is running, its very difficult to measure the relative phasing. Or does any one have an idea on how to measure this phasing ?

The reason I need this sort of data is that Im developing a mathematical model of the fluid flow through an S2000 engine and require this information as input data.

I have an S2000 engine sitting on a test bed, so in that respect I have full access ... so any suggestions are welcome.

Joseph Leen
University of Limerick
Ireland

 

Camshaft phasing does not change dynamically on the S2000.

The purpose of the scissor gears is to reduce lash and noise in the cam drive. The cam is still driven off the outer half of the gear, which is driven by the intermediate cog, which is driven by the chain. The second half of the scissor gear is spring loaded internally to take up lash clearance, but does not affect the phasing of the cam. If you can afford it, buy one of the gears and take it apart, its a simple, but interesting design. I say buy another gear because once you take one apart, it will be very difficult to put it back together without a special jig/tools.

Hopefully that will simplify your modelling.

UL

 

That clears up a lot ... could not figure out the split gears and was under the impression that the S2000 cams changed phasing

Thanks for the information

Joe