BELOW: Freevalve system uses electro-hydraulic-pneumatic actuators to provide independent and �e�i��e contro� o� t�e engine�s inta�e and e��aust �o�s
YOU CAN VIEW THE FREEVALVE SYSTEM IN OPERATION AT www. freevalve. com / freevalve-technology /
BELOW: 400 hp electric motor is mounted in series with the crankshaft of the 600 hp TFG engine
BELOW: Gemera features giant Koenigsegg Automated Twisted Synchrohelix Actuation Doors( KATSAD) that open wide, unhindered by the absence of B-pillars
up, reducing cold-start emission by around 60 per cent compared to an similar-sized traditional engine with conventional camshafts.
Even better is that, when running the TFG on renewable alcohol fuels, there are virtually no particulates produced and in many normal environments the TFG consumes and burns more particles from the surrounding air than it produces, thereby actually cleaning the air.
Using the best alternatives of alcohol fuels there is even the possibility for net-zero or CO 2 negative emissions. Although alcohol fuels maximise performance, as they provide greater internal cooling effects and have higher octane compared to petrol, they are more difficult to �a�orise than �etrol when cold. Therefore, petrol is usually added to the alcohol during severe cold starts to solve the problem.
The Freevalve system overcomes this cold start issue by utilising a pre-start heating mode for the initial cranking
and first combustion� �ne inta�e �al�e is used and opened late with low lift for maximum turbulence and vaporisation. Cylinder deactivation is applied to increase the amount of air and fuel in each combustion during starting and warm-up. Internal exhaust gas recirculation( EGR) is activated in the following combustion cycles, using hot residuals from the previous combustion to vaporise the fuel. Additionally, the engine’ s variable compression ratio is adjusted by the Miller cycle.
Furthermore, the TFG can be turned multiple times before switching on the ignition, using the piston to pump the air back and forth to the inlet in a‘ heating mode’ cycle, with the result that the inlet air temperature is increased by ���� in �� cycles, ta�in� about 2 seconds, without any need to add petrol to the fuel or starting cycle, making the TFG independent of fossil fuel use in any climate.
The TFG’ s Freevalve system allows full control of the combustion cycle,
affording a degree of control and reliability that is way beyond that of any other variable valve actuation system. Both the intake and exhaust valves can be opened and closed at any desired crankshaft angle and to any desired lift hei�ht� �his fle�ibility enables the ��� to achieve low fuel consumption and emission fi�ures, while still deli�erin� massive torque and power.
The Freevalve system also made it possible to create a patent-pending, sim�lified two�sta�e turbo system� Essentially, one turbo is connected to three exhaust valves – one from each cylinder. The second turbo is connected to the other three exhaust valves. During low rpm and part to high load, all exhaust gasses are pushed to only one turbo, by only opening one exhaust valve per cylinder – thereby doubling the exhaust gases to that turbine. When adequate boost is reached, the second exhaust valve is opened to start the second turbo.... P
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