In cylinder pressure measurement

[Tom Sharpe]

Let's see... the piston measures combustion pressure... hooked to a rod...
hooked to a crankshaft....If we could measure crankshaft acceleration 60 times a
revolution, we could come up with some relative numbers... we need a toothed
wheel and sensor and ????... Sharpe

C. Brooks wrote:

> Has anyone ever heard of anybody doing this? I was talking with someone
> about data acquisition systems and the subject came up while we were
> discussing methods of knock detection. I'm not to enthusiastic about being
> able to monitor A/F ratios accurately or in realtime, and our conversation
> kinda stuck with me.
>
> If anyone's ever seen or heard about somebody performing in cylinder
> pressure measurements I'd love to hear about it. I imagine the transducers
> would have to be pretty tough, how would they mount? What kind of sample
> rate do you think would be needed? Best of all, who would make a sensor that
> could take the abuse???
>
> Charles Brooks