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Aquarius Engines reinventing combustion

Written by Kfir Kedem – May 19, 2021

Reviewed by Asaf Kedem

Throughout industrial history, combustion engines have been used not only for cars, but also as power generators. They are still used as backup generators in many applications. With combustion engines coming out of the norm, new generators are needed. Aquarius Engines aims to fill in this gap. Their solution, although surprising, is still a combustion engine. However, it is not a traditional combustion engine. The Israeli company has invented its own model which is called the “Linear Engine.”


This engine works by using one piston that moves in one linear motion and does not need any oil for lubrication. By using a single piston, Aquarius Engines is able to get the weight of the Linear Engine down to only 10.5 kg. Other than using these engines to replace traditional generators, Aquarius Engines sees an additional automotive application. These innovative engines can be cozily mounted on standard electric and hybrid passenger and commercial cars, which will increase their driving range. The engines also have an energy loss value of only 2% whereas a traditional combustion typically functions with energy losses of about 15%.


It is quite small with the dimensions of 105.5 X 65 X 53 cm. Furthermore, it will only have to be maintained once every 1000 operational hours.


Auto Trendy’s take:

One would end up spending less over the entire lifespan of the Linear Engine when compared to a regular engine. This is due to the increased operational hours and the lack of lubrication needed. Furthermore, it would increase the range of driving, which is always sought after in the commercial vehicle industry.


From what we can understand, the Linear Engine will function as a generator on a car. Meaning that it would charge the battery and would not act as any form of replacement for a traditional combustion engine. Traditional combustion engines are built up of (typically) several pistons that are connected to the crankshaft and convert linear motion to rotational. This rotational motion moves rotating mechanical parts across the driveline of the vehicle until it finally rotates the wheels. With the linear motion of the Linear Engine, this does not seem to be what Aquarius Engines has in mind.

Knowing this, it can still be said that this is a great update to the antiquated style of the combustion engine and would definitely come in handy when providing additional range to commercial vehicles without adding on too much weight.