What VW has been developing is an integrated fuel pump into the cylinder
head. Extra "bumps" on the camshaft will help to supply fuel directly to
the injectors via and appropriate assembly. This increases the potential
fuel pressure and makes a more rapid and accurate injection with even
smaller fuel particles. One of the problems was that the injector has to
"leak" a small amount of fuel before the main injection to initiate the
ignition process (after all it's a Diesel). The actual timing and amount of
injectorate is controlled electronically.

Comprende? :)

Bj�rn

>Date:    Fri, 10 Sep 1999 09:56:24 -0400
>From:    Bulley <gmbulley@BULLEY-HEWLETT.COM>
>Subject: Re: New 1,9 TDI from VW
>
>While I don't know the specifics on the new Tdi, I can tell you that common
>rail injection cannot work on any compression-ignition motor, (like the
>Tdi). On a CI motor, the perfectly timed injection pulse of fuel into the
>super-heated-compressed air is equivalent to the well-timed spark plug
>firing on a lowly gasoline motor. Having the fuel injected on a common rail
>(or like CIS), would be like lighting all the spark plugs at one time on a
>common gasoline motor. Come-prend-day-vooo?
>
>G. Matthew Bulley
>Director
>Bulley-Hewlett & Associates
>www.bulley-hewlett.com
>Cary, NC USA
>888.468.4880 tollfree

Bj�rn Ratjen
Mill Bay, B.C.

1987 Vanagon est alia (self camperized)
1978 VW Bulli (self camperized)
1995 Passat TD Wagon (hers)
1970 VW Beetle (son's)