Parallel leaf springs are probably the most common type of rear suspension for '50s- and '60s-era cars. ... The system operates on a parallelogram principle, ...

The HybriDrive parallel system, in final stages of development, will see its first road trials next spring and is expected to be deployed in markets around the world in 2012.

According to Subaru, the Crosstrek system is a "series-parallel system" hybrid that uses either the engine or the electric ...