|EPOC Engine Layout|
The basic engine "unit" has 2 pistons per cylinder and multiple "units" can be coupled for a more powerful engine - or one or more "units" can be turned off at idle or during highway speeds.
" ... demonstrate, in 2010, the automobile industry's first 5-passenger car capable of 100 mpg on the EPA highway cycle."
" ... ground-breaking internal combustion engine ... eliminates the cylinder-head and valve-train components ... lighter, more efficient and economical, with lower exhaust emissions compared with conventional designs...."
Via: EcoMotors International LINK