The hydraulic command performs 12 functions, all of them individually regulable and in an automatic way. It compresses more smoothly and over comes smaller negative forces than the actual engines in the PMS. The intake chamber is 50% bigger as a consequence of the movement of the mobile cylinder head.

Exhaust	Admission	Compression	Transfer	Explosion
When opening the exhaust outlet, the existing air pressure inside the air lock forces the intake valve to open causing a complete sweeping.	When closing the exhaust outlet , fuel is injected inside the air lock ( pre-chamber). The intake process is completed when the mobile cylinder head goes backwards pushing the gases from the air lock (pre-chamber) inside the explosion chamber.	The mobile cylinder head stays motionless whit its valve closed. The piston compresses the gases to a 50% getting (reaching) to its PMS.	When the piston goes backwards to its PMI, it is attacked by the mobile cylinder head, which is moving at a higher speed, causing a full compression of the gases until they reach 70°.	At 65° the ignition starts, the mobile cylinder head blocks itself hydraulically at 70° bearing the force of the combustion. At this time, the pre-chamber is full of air in a natural state. At the end of the cycle, extra air coming from the side pump will join the one inside the pre-chamber.

The VTMG engine, performs the five cycles within only one turn of the crankshaft.

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