Tech

Skoda Octavia as a mild and plug-in hybrid

The upcoming Skoda Octavia will be offered as the technically identical VW Golf 8 with five electrically assisted drives. To two 48-volt mild hybrids, one with the one-liter three-cylinder 1.0 TSI (81 kW / 110 hp) and one with the one and a half-liter four-cylinder 1.5 TSI (110 kW / 150 hp) comes a plug-in hybrid with the 1.4-liter four-cylinder 1.4 TSI (150 kW / 204 hp), which reached 55 kilometers in the cycle purely battery-electric. Later, a more powerful version of this PHEV with 180 kW / 245 hp will follow. The only drive with manual transmission will be the one-liter mild hybrid, all others get the automatic shifting seven-stage dual-clutch transmission.

The two plug-in hybrid models of the Skoda Octavia have two advantages: Because their CO2Emissions are below 50 grams per kilometer, they get an e-mark. A big incentive for any company car owner: who is allowed to use a company car privately, gets a tax rebate. The pecuniary benefit only needs to be taxed monthly at half a rate instead of just one percent of the gross list price until recently. This benefit has recently been extended.

Another advantage for purchasers of plug-in hybrid vehicles is the "environmental bonus" of 3,000 euros distributed by the state and automobile manufacturers for a PHEV that is powered by electricity at least 40 km in the WLTP. At the same time, the plug-in hybrid models offer lower consumptions in the measurement cycle, measured in terms of CO emissions2, The aim is to achieve a new fleet limit of 95 g / km for 2021.

Volkswagen

How the hybrid drives are built, we know already from the Golf 8. The picture shows the belt starter generator of mild hybrid models. He is just an extension of the already known internal combustion engines.

(Photo: Volkswagen)

This applies equally to the Mildhybrid versions, whose battery can not be charged externally and serves only as an intermediate storage for the brake energy recovery. A 48-volt network in addition to the 12-volt electrical system allows lower losses and higher recuperation rates during braking due to the higher voltage. However, the Skodas will not be able to drive electrically, hence the term "Mildhybrid".

The drives in mild hybrids are based on the already familiar internal combustion engines, just like the plug-in hybrid models. They are equipped with a belt starter generator, which is the starter and alternator in one and communicates via the crankshaft with a drive belt.

For acceleration requirements above a certain level, especially at low speeds and speeds, the force of the electric motor can act directly on the crankshaft via the belt. The combustion engine, which is relieved of this so-called "boosting", can thus be operated more efficiently by giving up its full power, above all in operating areas in which it runs most economically.

The belt starter generator also serves as a starter. He starts the combustion engine with such high power that the starting process can hardly be noticed. Thus, it allows so-called sailing, so switching off and decoupling the engine in certain scrolling phases. The electrified combustion engines should be able to save up to 0.4 liters per 100 km.


(Fpi)



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