www.gomecsys.com

The GoEngine Generation 2
Lower friction, lower production cost, higher efficiencies.

After having developed a 2 and 4 inline demonstrator engines Gomecsys is now working on a new generation of their GoEngine VCR technology. The most important change compared to the first generation is that friction levels will be much lower. We even expect that no added friction will be generated by the system when used on a normal engine with the same displacement. The lower friction level is realized because the eccentric and gear rotate around the crankpin in the same direction as the crankshaft and not in the opposite direction as before. When the engine is running 6000 rpm this means that the eccentric bearings and the gear do not run 9000 rpm as with the generation 1, they run only 3000 rpm, that is a spectacular reduction of 66% in speed and about 80% in friction of the eccentric bearings and gear.

GoEngine Generation 1 and 2 compared.

Another big advantage of the gen 2 system is that we got rid of the ringgear in the block. Because of the ringgears in the block we not only needed a cast iron block but this construction was also sensitive for gear noise. On the generation 2 system the complete mechanical system is on the crankshaft, complete with actuation. Changes to the block are minimal when an existing engine is modified with a GoEngine generation 2 system.

The 3rd major advantage is that longer piston strokes can be used without the need of a very big ringgear. The ringgear diameter of the Gen 1. system was 3 times the stroke, with the Gen 2. system the space/envelope needed in the block to rotate the eccentric gear is less then 2 times the stroke. This means that an inner block space of 170 mm diameter is now needed for a 88 mm piston stroke. The longer strokes give an advantage in thermodynamics and will of course give more powerful engines.

The Gen 1. prototypes are already running at peak torque levels of 233 Nm per litre with 3 bar boost, this torque will generate a power output of 147kW (200bhp) per litre. This means that the new Gen 2. four inline proto GoEngine with 1500cc is expected to deliver 220 kW (300 bhp) with about 15% reduced fuel consumption compared to a normal 1.5 litre engine with less than 1/3 of the power output.

To reduce fuel consumption and CO₂ emission we expect to see more and more small cars on the road which don’t need more then about a 100 bhp. The logic conclusion then is that for all these cars you don’t need a 4 inline engine. A downsized boosted 2 inline engine can easily do the job. And a 2 inline gives a win win situation for everybody. It’s high tech but low cost solution, gives about 40% reduction in weight and space. It’s by far the easiest way to reduce friction and because of that it’s a very good way (if not the best) to reduce fuel consumption dramatically without cost increase. Power is no problem, a 1 litre 2 inline GoEngine will deliver as much as 200 bhp at 6000 rpm. With this technology we will achieve the EU target of 125 gr/km regarding CO₂ emission. The solution is ready and available for everyone.

Fuel consumption reduction of the Gen 1. GoEngines looks already very promising. The Gen1. results regarding fuel reduction are about 35% and 18% for the 2 inline and the 4 inline resp. Where the 2 inline GoEngine is compared to a 1,4 litre 4 inline engine with 75 bhp (equal power output) and 6 litre/100km fuel consumption. The 4 inline gen1. GoEngine developed in cooperation with technical partner Prodrive is compared to the original 1.8 litre 4 inline supercharged donor engine with 8,6 litre/100km fuel consumption. The fuel reduction results of the Gen2. GoEngine are as high as 50% compared to engines with the same power output.

GoEngine Generation 2 V8.

The basic functionality of the GoEngine VCR system is not changed. Important advantage of the technology are the extra features in addition to the Variable Compression Ratio (VCR). The over expanded engine cycle, a 20% longer expansion stroke then compression stroke not only gives more of the combustion force/pressure to the piston, enhancing efficiency and power output, but also reduces exhaust temperature importantly. The reduced exhaust temperatures makes live a bit less harsh for the turbo and reduces the need for extreme over fuelling.

The difference tdc positions within one cycle is also a unique feature of the GoEngine technology and results in having automatic internal EGR in part load. No valve pockets are needed because of this feature.

The GoEngine technology can also be used on boxer and V6/V8 engines. A 3 litre V8 GoEngine with 600 bhp peak power can replace existing big V8’s and V12 engines reducing fuel consumption with 30% and still delivering the thrill of a V8.

For detailed information please contact Gomecsys directly.

Gomecsys BV
Energiestraat 23B1
1411AR Naarden
The Netherlands

Tel : +31 (0)35 6781 356
Fax : +31 (0)35 6781359
Email : info@gomecsys.com
Web: www.gomecsys.com

 

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