1. What does CITS stand for?
Crankcase-Independent Two Stroke.
Traditional two-stroke engines require the crankcase to suck in air fuel mixture. Oil is mixed in the fuel to lubricate the bearings and rings inside. This oil-fuel mixture is then transferred into the combustion chamber where it is burnt – this results in very poor emissions.
The CITS Engine separates the induction from the lubrication system – it features a traditional sump as found on most 4 stroke engines. This means that oil is no longer added to the fuel, and emissions are reduced.
2. Does the CITS Engine need oil added to the fuel like a normal 2 stroke?
No, the CITS Engine does not need oil added to the fuel. It has its oil in a sump like 4 stroke engines, and this also reduces emissions.
3. In what format and how many cylinders can it be used in?
Any number of paired cylinders, as the CITS Pivot Inlet-Valve and By-Pass valve fit between each paired V cylinders. So typically up to say a V-12 for a hospital emergency generator of over 2000 kW or a V-twin for a 140 kW plug-in Hybrid car. Or of course a single cylinder for small generators and water pumps etc.
4. How powerful is it?
There are many factors that play a part in power output including capacity, fuel type, configuration etc. When compared like-for-like the CITS Engine is perhaps the most powerful naturally aspirated engine design on a cost, weight or bulk basis. Currently the Rotax R 800 ETEC – is one of the most powerful normally aspirated production engines today, a two-stroke with an incredible 115kW from just 800 ccs and 2 cylinders. If we add the triple induction power of CITS, plus its 60% reduced imbalance forces, plus the CITS pivot inlet-valve which eliminates the flow resistance of the tension-closed typical reed inlet-valves, we can expect even a further leap in output.