French
DeutschKoenigsegg TFG
| TFG | |
|---|---|
| Overview | |
| Manufacturer | Koenigsegg |
| Also called | Tiny Friendly Giant |
| Production | 2020-present |
| Layout | |
| Configuration | Inline-3 |
| Displacement | 121.3152 cu in (2.0 L) |
| Cylinder bore | 3.7 in (95 mm) |
| Piston stroke | 3.68 in (93.5 mm) |
| Cylinder block material | Magnesium alloy |
| Cylinder head material | Magnesium alloy |
| Valvetrain | Camless |
| RPM range | |
| Max. engine speed | 8500 RPM |
| Combustion | |
| Fuel system | E85 |
| Fuel type | Gasoline, E85, E100, Methanol |
| Output | |
| Power output | 600 hp (450 kW) @ 7500 RPM |
| Torque output | 443 ft⋅lbf (601 N⋅m) @ 2000 RPM 295 ft⋅lbf (400 N⋅m) @ 1700 RPM |
| Dimensions | |
| Dry weight | 154 lb (70 kg)[1] |
The Koenigsegg TFG is an inline-3 engine. The TFG stands for "Tiny Friendly Giant." It is a Freevalve (camless piston engine), thus it does not have a camshaft. Instead it uses electro-hydraulic-pneumatic actuators that allow it to open each valve (both intake and exhaust) independently to maximise performance and minimise fuel consumption depending on driving conditions. The actuators also have the ability to switch the engine between 2- and 4-stroke cycles by controlling the number of power strokes in relation to the number of idle strokes.[2] The patent for this system was bought by Koenigsegg's sister company Cargine Engineering in 2002.[2] The variable displacement system allows fuel economy to be 15%-20% higher than a variable camshaft engine. Cold start emissions are also drastically reduced by 60% over a variable camshaft engine. The engine is equipped with the same turbo for each set of exhaust valves developed by van der lee Turbo Systems,[3] So this is a switchable parallel system where at low exhaust mass flow the boost is created by one turbo and the second turbo being switched by at higher mass flow amounts, thus improving transient response. Without the turbos, Koenigsegg claims the engine is only capable of 300 hp (220 kW). The engine can operate on the Otto cycle, Miller cycle, or the Atkinson cycle.[4] Further advantages of the camless engine is that a throttle body is no longer required because of the precision of the valve timing. According to Koenigsegg CEO Christian von Koenigsegg, when running on Gen 2.0 ethanol, the TFG becomes "at least as CO2-neutral as an EV running on renewable electric sources such as solar or wind."[5] The TFG follows previous Koenigsegg engines in its ability to run on all major fuels, from E100 to standard gas.
References
[edit]- ^ David Tracy (9 March 2020). "A Detailed Look At The Koenigsegg Gemera's Mind-Blowing Engineering". Retrieved 28 December 2021.
- ^ a b US 7047910, Hedman, Mats, "Method of torque modulation", published 2006-05-23, issued 2002-08-29, assigned to Cargine Engineering AB
- ^ Radu, Vlad (2020-10-20). "Koenigsegg Gemera: ibrida col motore Freevalve Gemera". autoevolution. Retrieved 2020-11-26.
- ^ Warner, Robin (2020-03-26). "Free valve! It's the only way to achieve a true engine democracy and a great way to make 600 hp". Autoweek. Retrieved 2020-11-26.
- ^ "Interview on the Gemera with Christian von Koenigsegg". Koenigsegg. Retrieved 28 December 2021.
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