Motor vehicle engine design has remained fairly standard throughout the history of the technology, although things have evolved quite a bit from the T-4 engine that powered Henry Ford’s pioneering Model T. Since the automobile became a common fixture in the early 20th century, the engines in most vehicles have featured a single piston per cylinder attached to a crankshaft via connecting rods. Mazda’s 13B rotary engine was one deviation from this standard. Still, the overwhelming majority of cars and trucks
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