The Robert Bosch Corporation has "redefined" the premium spark plug market
with the introduction of its new Platinum+4 spark plug.
The basis of the new Platinum+4 is Bosch's unique four ground electrode
design, which provides multiple radial spark paths, as opposed to a
conventional single ground electrode design with one axial spark path.
With the four ground electrode design, the spark finds the most efficient
path from the platinum center electrode, ensuring the least electrical
resistance. The resulting spark is longer, more efficient and more powerful
than that of a conventional single ground electrode. This translates into
optimal access to the air/fuel mixture, producing superior burn
characteristics and peak engine performance over a longer plug life.
An yttrium-alloy is added to the four ground electrodes providing up to
double the wear resistance of a standard plug ground electrode. This results
in a spark gap that remains unchanged. Plus, the new Platinum+4 spark plug
is pre-set at the factory, so it never needs to be regapped.
Tests confirmed that Bosch Platinum+4 transfers energy more efficiently to
the air/fuel mixture resulting in a more powerful spark for smoother idling
and acceleration. Other performance benefits confirmed were better cold
restart reliability, improved fuel economy, and a longer performance life.
The Bosch Platinum+4 spark plug carries a full replacement performance
guarantee that extends throughout the entire vehicle manufacturer's
recommended spark plug change interval.
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