Hi Guys,
Getting there, going insane slowly, but succeeding marginally faster.
(I have had a nightmare over the cylinder head with no less than 3 experts saying, "Don't let anyone else fit the valve seats - it might be done wrong" then doing nothing for weeks and finally giving it back to me. It is absolutely unbelievable and there are a bunch of - what are they called? - out there. In their spare time, I think they run the baggage system at BAA airport terminals.
Otherwise I'd have reported on progress - I'm hoping the 4th guy WILL do it).
[First (gossip), Delphi, who make the advanced diesel parts for Renault and US trucks, is going down the financial gurgler. I wonder if they'd like to do something useful and build a Two-Stroke Turbo diesel aero-engine for me?
As to my project, getting info on the intricacies of the
injectors is like doing industrial espionage. Quite amusant. The
experts know only that "you attach terminal x to prong Y and it works."
However, contrary to HDi's guess (which was very fair), the solenoid opens on "a few milliamps" (spy zvw/1, picked up at a Dead Letter Box in the Lake District) but "about 80 volts" (source
imgSG/G *3, deciphered from an Ad in the Personal Column of the Mirror). This makes sense, because in simple terms, a high voltage will "push faster" than a low one. The current is another matter. So the rapid response we need must come from
discharging a capacitor. Next, what size capacitor? I'll work this out and we have a simple circuit (I'm no electronics expert - I'm looking
for one) with an impulse from the flywheel switching a transistor to Go for the capacitor to discharge across the injector solenoid (and Stop to cut the battery out of the circuit for the duration).
(Note: the solenoid doesn't work against the hydraulic pressure, as has been suggested).
All the best
Malc:
