Škoda models bearing the e-TEC designation are equipped with a mild-hybrid drive system. In these cases, the function of the combustion engine is supplemented by an electric motor to assist the conventional combustion engine.
Automobile manufacturer Škoda uses the e-TEC designation as a trade name for its MHEV (Mild Hybrid Electric Vehicle). MHEV vehicles are characterised by using an electric motor, sometimes referred to as a reversible alternator, instead of a conventional alternator. This electric motor can be used in both directions, i.e. as a starter or as a generator of electric current. This solution extends the hybrid possibilities of the vehicle, i.e. the usability of electrical energy for propulsion.
The reason for using mild-hybrid technology is to reduce fuel consumption and thus exhaust emissions, especially the monitored CO2 value.
Škoda e-TEC technique
Compared to the conventional version with an internal combustion engine, Škoda e-TEC cars are equipped with an electric motor (starter-generator) and a 48V Li-Ion battery, usually located under the passenger seat, see picture. Their cooperation offers the car greater possibilities of recovering the motion energy and reusing it to power the vehicle. When the combustion engine brakes, the electric motor can generate electricity which is stored in the 48V battery. The stored energy is then used to support the internal combustion engine, for example, during starting, starting up or acceleration. The electric motor can assist the internal combustion engine with up to 12 kW of power.
In addition, the on-board network of MHEV cars is supplemented by a DC/DC converter, which provides the possibility of recharging the 12V battery from the 48V mains, or helps to stabilise the voltage on both mains if required.
The described mild-hybrid system is actually just an improved Start/Stop system. The significant advantage of the MHEV system is that it can better shut down and restart the internal combustion engine, as it can do this even at low speeds, around 20 km/h. Starting an engine whose flywheel is not at rest is unthinkable with a conventional starter!
What is the difference between vehicles marked with the e-TEC symbol and the iV symbol?
Škoda uses two levels of electrification for its vehicles. The basic level of electrification are vehicles bearing the e-TEC trade mark, these are MHEVs that cannot run purely on electricity. The second type of electrification are vehicles marked with the symbol iV, which can already run purely on electricity. These are either plug-in hybrids or pure electric BEVs.
What does the g-TEC symbol stand for?
The letters TEC on the rear of Škoda vehicles generally indicate a vehicle with alternative drive. In the case of the g-TEC designation, the alternative fuel source is compressed natural gas (CNG).