IJSBA is pleased to wecome Wasserjet as the newest exhibitor at the trade show portion of the 2014 Jettribe World Finals. Here is the statement from Wasserjet:
The 2-stroke engine, to date, is the most common engine used in the stand up PWC. California, New York, and several US National Parks have already banned them and it is only a matter of time until they will be banned from all waterways.
The most common alternative to a 2-stroke is a 4-stroke reciprocating piston engine. These engines are not adequate for the stand-up PWC because of their weight and over-all dimensions (power-to-weight ratio). The need for a better solution, in the wake of recent EPA regulations, is crucial to sustaining the standup PWC market.
Reflecting on the current issues with the standard 4-stroke engine for the stand-up PWC, Wasserjet took a hard look at the Wankel rotary engine. One big advantage, of the Wankel engine, is the power-to-weight ratio. It exceeds that of the 2-stroke engine. In addition, take note to the processes within the engine. Due to the long timings and high exhaust temperature, any oil entering the combustion chamber burns
almost without residue. Emissions of a Wankel can be as low as 1% of comparable 2-stroke engines and levels equal to a 4-stroke.
Wasserjet engines are charge cooled. Charge Air cooled is the use of the intake air for cooling and lubrication of its main components. There is no crankcase oil, making the engine extremely light. Our engines use a quad fuel injected intake system: Fresh gases flowing through the first port, enter the engine from one side plate. Then they flow through the rotor and the eccentric shaft in axial direction to cool and lubricate the rotor, eccentric shaft and main bearing, and from there they enter the combustion chamber through a transfer port in the opposite side plate. The second inlet is used for direct airflow to “Boost” the power. With 4-stroke type combustion the efficiency is 20-30% better than comparable 2-stroke engines.