Vehicle engineers believe the breakthrough in internal combustion technology would come from mastering the variable compression ratio. (infinitiusa.com)
High precision combustion technologies assist with improving engine output and lead to improvements in fuel efficiency and competitive emissions. (motor-prime.com)
BMW demonstrated a hydrogen - powered internal combustion technology in some of their concept cars in 2000 and 2001, and Mini showcased a hydrogen - powered concept car in 2001 at the Frankfurt Auto Show. (en.wikipedia.org)