In 2001, Ford Motor Company revealed their Ford
P2000, the first North American production viable
hydrogen prototype vehicle with 1.5 kg compressed
hydrogen storage and a 2.0 L inline four-cylinder engine.
The prototype vehicle was tested with different calibrations
including a constant air–fuel ratio lean-burn strategy
(quantitative control) at 0:55, an operating strategy
with full-load enrichment up to 0:7, as well as a
largely unthrottled calibration that was only demonstrated
through engine dynamometer testing [21]. Starting in
2004, Ford offered a Hydrogen Shuttle Bus for leasing,
based on the E-450 bus, see Fig. 6. The 8–12 seater shuttle
bus is powered by a 6.8 L V-10 Triton engine using
supercharging and a constant equivalence ratio strategy.
The fully engineered demonstration vehicle features a
compressed hydrogen tank system operating at 35 MPa
with a total capacity of 29.6 kg allowing for a vehicle range
from 240 to 320 km [22]–[25].