Maybe we can use these. Apparently they are much faster so the dynamic
range is higher.

http://www.conti-online.com/generator/www/de/en/cas/cas/functions/contact/contact_en.html

http://www.autoweek.com/apps/pbcs.dll/article?AID=/20060609/FREE/60605013/1024/LatestNews

"Piezo injectors are just now coming to Europe on high-end vehicles from
Range Rover, Audi and Mercedes-Benz. Piezo is widely seen as the next
big evolution of the diesel engine.

Small crystalline discs in the injector change shape when electricity is
applied. When the discs change shape, diesel fuel under high pressure is
shot through a needle in a fine spray into the engine's combustion
chambers.

As many as seven injections can be made in a single piston stroke,
compared with one or three injections in most diesel engines. Those
multiple injections lower the temperature in the combustion chamber,
which in turn lowers oxides of nitrogen emissions.

Piezo injectors also reduce noise, vibration and smoke, all unpopular
traits of a diesel engine."

"The piezo injectors to be used in the Super Duty pickups will be made
by a joint-venture company in Blythewood, S.C., owned by German supplier
Siemens VDO and International. Production of the injectors is scheduled
to start in December,[2007?] said Siemens spokesman Brad Warner. He
would not confirm any vehicle applications but said the plant's entire
output will go to International."

Continental Teves, Inc.
One Continental Drive,
Auburn Hills, MI 48326, USA
Phone: +1 248 393-5300
Fax: +1 248 393-5301

Paul Lamar

Paul,
the piezo injectors have been manufactured for several years now. They
are the standard injector for the newest VW diesels and at least the
2008 VW and Audi gasoline powered cars. All of these models use a new
lightweight (their words) motor driven secondary pump as all of these
models are direct injected. I believe they all use at least 3 injection
events per power stroke. The diesels can use 5 to 7 injections according
to the articles I read on the units.
Bill Jepson

That may be true on a piston engine but that is pushing it on a rotary
at 6000 RPM and above :)


Paul Lamar


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