At bottom-dead-center (BDC) the inlet valve is closed and the compression stroke (b) starts. Work is done on the air/fuel mixture as the piston moves to TDC. In the vicinity of TDC the spark ignites ...

Nissan brought the first, and only, variable-compression engine to market. But its future doesn't look bright.

With a 4.010-inch bore, a 4.00 inch stroke, 70cc chamber, 0.051 gasket, a pure flat top piston, and a piston 0.005-inch below the deck computes out to 11.15:1, but add 6cc with a larger chamber ...

In individuals with chronic stroke, intermittent pneumatic compression (IPC) therapy improved performance in some functional ...