Environmental Technologies and Eco-innovation in the Czech ...

3.1 | Increasing the efficiency of combustion engines
Currently, there is a tendency to reduce engine volume and increase its efficiency
through supercharging by a turbo blower or compressor. Systems with variable suction
lengths, variable timing, valve lifts and different methods for recirculating exhaust
fumes are used in the preparation of fuel-air blends. Fuel consumption is also reduced
by decreasing friction losses in engines, by improving materials used for guide surfaces
and by using high-quality lubricants. Another benefit of these systems is a reduction
in CO 2 emissions and engine fuel consumption. The scope of their use depends on the
philosophy of individual companies and prices of particular vehicles. Maximum usage
of all existing and newly developed measures is necessary if all vehicles are to comply
with agreed-upon emission standards. 2
TABLE 5 | A comparison of fuel consumption and CO 2 emissions in new Škoda Octavias [kW, Nm, l, g.km -1 ]
Engine Fuel Supercharging
Output
[kW]
Angular
momentum
[Nm]
Combined
consumption
per 100 km [l]
Emissions
CO 2 [g.km -1 ]
1.6 MPI petrol no 75 148 7.4 176
1.4 TSI petrol turbo blower 90 200 6.6 154
1.9 TDI DPF diesel turbo blower 77 250 5.1 135
1.6 TDI DPF 2 diesel turbo blower 77 250 4.4 116
SOURCE | Škoda Auto a.s.
3.2 | Hybrid drives
The development of hybrid drives in the Czech Republic has advanced. This is mainly
seen with the SOR brand of buses that will be equipped with a diesel engine, an electric
drive and batteries. The manufacturer indicates lower diesel oil consumption up to
by 10 litres per 100 kilometres and lower CO 2 emissions by one-quarter compared
to the vehicles with a classical drive. Launching onto the market is anticipated by no
later than 2011. In the Czech Republic, Bosch manufactures electric motors for parallel
2 1.6 TDI DPF – the model complies with CO 2 emission standards prescribing 120 grams per kilometre, which the EU plans to
implement by 2012
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