What is tuned to alternative car drives?


On 6 and 7 November VDI organized together with VW’s session “Innovative vehicle drives” in Dresden. This was about hybrids, hydrogen fuel cells and electric cars. And what came out? When the slogan “plate instead of tank” the flowers dreams of politicians from bio-based fuels wiped off the table, they were quickly two other alternatives at hand, namely hydrogen fuel cells and “of course!” The electric car.

Moreover, the German automotive industry – again, naturally! – The hybrid sleepy, and only Toyota had the ancient idea again to promote daylight. In Dresden brought the speakers all the wonderful ideas of a bright, emission-free car again in the future reality.

That the hybrid drive, combining a combustion engine with an electric drive, in the metropolitan traffic and on short routes and save fuel liquid against electric can enter, we will be known. However, its price, which, although large and expensive cars can be reasonably accommodated, but hardly inexpensive small. It is the savings effect is relatively modest, if not deep into the tricks draw wants. On long-haul, on the other hand, it is indispensable to the combustion engine,
the consumption behavior determined.

The talks in Dresden showed what we could do everything to the electrical part to integrate into the car. Meanwhile, Mercedes presented its first “mild” hybrid in the S 400, which next spring will be offered. Despite the restriction on a minimum of additional parts and a small lithium-ion battery, the electric drive is not allowed, the extra weight is 75 kg. Nevertheless, the reduction in consumption in the NEDC to 7.9 l/100 km for a 3.5-liter V6 gasoline engine considerably and represents the engineers made an excellent witness.

But as lower consumption even further? Then VW responded with the “Twindrive” golf, the research by a small diesel with 75 kW (102 hp) from 1.5 liters engine capacity is driven, three electric motors has LiIo and a battery of 300 volts with a 12-kWh Energy content, a power of 60 kilowatts and a weight of about 150 kilograms. On a drive from Wolfsburg after Brunswick consumed the car – converted to 100 kilometers – 16 kilowatt hours of electricity and 0.55 liters of diesel fuel. On long, mostly on the highway, the engineers have a fuel consumption of 4.5 to five liters measured. Here, the electric drive only when accelerating on a mountain or braking action.

A conventional gearbox, the car is no longer as the electric drives
the “switching area coverage. From that golf will be in Wolfsburg, 20 copies and will be built by 2012 in the hands of selected customers their suitability in
Practice proved. The engineers hope that the power density of batteries now can be raised in order to reduce the weight and the scope for purely electric driving to improve. Currently, depending on driving conditions 30 to 80 kilometers.

The remaining units showed how varied the combination of these technology options are. There is no general solution. There is agreement, however, the battery issue. As long as there is no significant progress, are extra weight and price too high.

Only on the margins was the security in dealing with highly efficient batteries that require the developers worry spreads, as well as the significant increase in expensive materials such as copper. The course meets on pure electric vehicles even more. That such cars with ranges of up to about 50 kilometers today are possible, with the Mercedes-electric Smart in London demonstrated. Its first hot battery has been used by a LiIo battery replaced, which cost about 6000 euros. This price is increasing with higher production volumes fall, but not up to the level of current lead-acid batteries.

Who does not believe the burden should watch, when LiIo batteries from the steel hull on the temperament to be driven scheme. How to drive an electric car designed, long known. That’s why the interest focuses on batteries for the car drive only at the beginning of its development, we are. After VW researcher Wolfgang Steiger they have ten times the energy density of today’s reach to allow longer routes.

How indeed an ever greater number of electric cars with electricity supplies will be looking into the stars. Plugs approximately one million metropolitan residents their batteries from 18 to 19 clock in the sockets of the public network, breaks together. And what about the Laternenparkern which does not have its own house have? – It lacks the infrastructure completely.

What finally says the Finance Minister, if electric cars more and more electricity from the power draw? – It is unlikely the tax eyes, because these cars yes “emission-free” travel. And electricity from “renewable sources”? – For what?

When hydrogen fuel cell car will be even worse. Because the electricity, which ultimately drives the car, must be based on detours on the hydrogen produced. One cubic meter of gaseous hydrogen requires in the electrolysis of water 4.5 kg watt-hour electricity. Taking all costs and losses, which in dual material conversion occur, the efficiency drops to a deplorable level. The whole story is to inefficiency can no longer be on offer. Today is the fuel cell also still deep in the research phase.

As VW’s research chief Juergen Leohold question was asked in Dresden, when the series because with maturity of the hydrogen fuel cell cars would be expected, was the clear answer: “Never.” The defense lawyers called some time 2020 – you know, the series production for over ten years, more and more pushed into the future – the electric car is expected to make clear winner.

Our unrealistic politicians see the admittedly very different. Thus, only Germany in 2009, 46.5 million euro funding for fuel cell
spend, even while the EU of over one billion euros talks, which over several years to be distributed. For the receiving company is obviously a fine Zubrot (to bread). But what comes out, the participating engineers know full well that no series mature hydrogen fuel cell car. In the background lurks the politicians hope the hydrogen from “renewable” energy sources produce, preferably from wind and sun.

Alone with the thoughts out what to build offshore wind farms on the networks play, the energy suppliers are already the hair on end. Because if the wind is blowing right, not only are the backups, but also the combustion of lines, while doldrums in the country rings the lights go out. Finally, as dreamers want Scheer & Co., nuclear and coal power plants and Germany off the final order in a bitterly poor “environmental” model country without industry transform, then of course, no cars can pay more.

But who is from today’s research and development phase emerge as the winner? – Also there is a clear statement: the internal combustion engine. Although he is somewhat different than today, when petrol and diesel unite – Mercedes’ Diesotto referred. But both the energy content of liquid fuels as well as security in dealing with the existing infrastructure and leave no other conclusion. The small diesel VW research shows ever, what is possible today. Contrary to the general trend, he has only two valves per cylinder. He works with Common-Rail, the maximum of “only” 1800 cash returns, and also offers without Harnstoffeinblasung (SCR) into the exhaust emission limits of the 6th Euro

Will also convert the fuel to XTL, a synthetic fuel from biomass, organic waste, gas and coal. XTL is a prerequisite for the development of the internal combustion engine. Sometime in this way will perhaps also in German politics revoke reason. Then finally the need ever closer fetters be resolved, of which science and technology on which prevented what they can and want. Namely solutions for the future.

Posted under Fuel Cells, Hydrogen Economy

This post was written by admin on November 17, 2008


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