Ufficiale: Volkswagen XL1 Concept

beckervdo · 25 Gennaio 2011

Gallery Completa Volkswagen XL1 Concept

Future mobility is one of the most stimulating topics of our time. The key question here: Just how much could the energy consumption of cars be reduced if all the stops were pulled out for efficiency? There is now an answer to this question, and Volkswagen is delivering it in the form of the new Volkswagen XL1 Concept. Combined fuel consumption: 0.9 l/100 km. No other hybrid car powered by an electric motor / internal combustion engine combination is more fuel efficient. The prototype makes its world debut at the 2011 Qatar Motor Show (26-29 January, 2011).
Conceptually, the Volkswagen XL1 represents the third evolutionary stage of Volkswagen's 1-litre car strategy. When the new millennium was ushered in, Prof. Dr. Ferdinand Piëch, who is today Chairman of the Supervisory Board of Volkswagen AG, formulated the visionary goal of bringing to the market a production car that was practical for everyday use with a fuel consumption of 1.0 litre per 100 km. In the new XL1, Volkswagen is demonstrating that this goal is now within reach.
The new Volkswagen XL1 attains a CO2 emissions value of 24 g/km, thanks to a combination of lightweight construction (monocoque and add-on parts made of carbon fibre), very low aerodynamic drag (Cd 0.186) and a plug-in hybrid system − consisting of a two cylinder TDI engine (35 kW/48 PS), E-motor (20 kW/27 PS), 7-speed dualclutch transmission (DSG) and lithium-ion battery. The results: with fuel consumption of 0.9 l/100 km, the new Volkswagen XL1 only emits 24 g/km CO2. Since it is designed as a plug-in hybrid, the XL1 prototype can also be driven for up to 35 kilometres in pure electric mode, i.e. with zero emissions at point of use. The battery can be charged from a conventional household electric outlet. Naturally, battery regeneration is also employed to recover energy while slowing down and store as much of it as possible in the battery for re-use. In this case, the electric motor acts as an electric generator.

Despite the very high levels of efficiency, developers were able to design a body layout that offers greater everyday practicality, incorporating side by side seating rather than the tandem arrangement seen in both the first 1-litre car presented in 2002 and the L1 presented in 2009. In the new Volkswagen XL1, wing doors make it easier to enter and exit the car. Further progress has been made by manufacturing body parts from carbon fibre reinforced polymer parts (CFRP), a technique used in Formula 1 car construction. Once again, Volkswagen has successfully achieved significant reductions in production costs - an important step forward to make viable a limited production run of the XL1. Background: together with suppliers, Volkswagen has developed and patented a new system for CFRP production in what is known as the aRTM process (advanced Resin Transfer Moulding).
The most efficient car in the world
The new Volkswagen XL1 Concept shows the way forward for extreme economy vehicles and clean technologies. It also demonstrates that such cars can also be fun. The feeling when driving the XL1 is truly dynamic − not based on pure power, rather on its pure efficiency. Two examples:

To travel at a constant speed of 100 km/h, the prototype only needs 6.2 kW/8.4 PS - a fraction of the performance of today's cars (Golf 1.6 TDI with 77 kW and 7-speed DSG: 13.2 kW/17.9 PS).

In electric mode, the Volkswagen XL1 needs less than 0.1 kWh (82 Wh/km) to complete a one kilometre driving course. These are record values.

When the full power of the hybrid system is engaged, the Volkswagen prototype accelerates from 0 to 100 km/h in just 11.9 seconds; its top speed is 160 km/h (electronically limited). Yet these numbers alone do not tell the whole story: Since the XL1 weighs just 795 kg, the drive system has an easy job of propelling the car. When full power is needed, the electric motor, which can deliver 100 Newton metres of torque from a standstill, works as a booster to support the TDI engine (120 Newton metres torque). Together, the TDI and E-motor deliver a maximum torque of 140 Newton metres in boosting mode.

Two-cylinder TDI uses mass production technology: The 0.8 litre TDI (35 kW/48 PS) was derived from the 1.6 litre TDI, which drives such cars as the Golf and Passat. The 0.8 TDI exhibits the same data as the 1.6-litre TDI common rail engine in terms of cylinder spacing (88 mm), cylinder bore (79.5 mm) and stroke (80.5 mm). In addition, the Volkswagen XL1 Concept's two-cylinder and the mass produced four cylinder share key internal engine features for reducing emissions. They include special piston recesses for multiple injection and individual orientation of the individual injection jets. The excellent, smooth running properties of the common rail engines were transferred to the two cylinder engine. within addition, a balancer shaft that is driven by the crankshaft turning at the same speed optimises smooth engine running.
Meanwhile, the TDI's aluminium crankcase was constructed to achieve high rigidity and precision, which in turn leads to very low friction losses. With the goal of reducing emissions, exhaust gas recirculation and an oxidation catalytic converter as well as a diesel particulate filter are used. Equipped in this way, the 0.8 TDI already fulfils the limits of the Euro-6 emissions standard.
Also designed for efficiency is the vehicle's cooling system. Engine management only cools the TDI by activating an externally driven electric water pump when engine operating conditions require it. This cooling system includes an automatically controlled air intake system at the front of the vehicle to reduce cooling system drag. This thermal management strategy also contributes towards reduced fuel consumption. A second electric water pump, which is also used only as needed, circulates a separate lower temperature coolant loop to cool the starter generator and power electronics.
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AngeloE46ci · 25 Gennaio 2011

il frontale è molto bello... dietro un pò troppo futuristico... ma è così che deve essere

addlightness · 25 Gennaio 2011

quando ho visto la X ho subito pensato all'ennesimo furgone rialzato...

..invece, gradita sorpresa!

sarà anche poco appetibile per degli smanettoni , ma almeno è un bel passo avanti

beckervdo · 25 Gennaio 2011

Mi incuriosisce l'albero a gomiti totalmente in alluminio...

addlightness · 25 Gennaio 2011

beckervdo ha scritto:

Mi incuriosisce l'albero a gomiti totalmente in alluminio...
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crackcase, non crankshaft :wink:

ma un bicilindrico diesel non la smonta la macchina?

AngeloE46ci · 25 Gennaio 2011

addlightness ha scritto:

crackcase, non crankshaft :wink:
ma un bicilindrico diesel non la smonta la macchina?
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sai un monocilindrico... /emoticons/biggrin@2x.png 2x" width="20" height="20" />

addlightness · 25 Gennaio 2011

AngeloE46ci ha scritto:

sai un monocilindrico... /emoticons/biggrin@2x.png 2x" width="20" height="20" />
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l'Ape Poker (e mi pare anche il tm ) c'erano!

come si dice dalle mie parti...uno scoppio a colonnino

Pin · 25 Gennaio 2011

addlightness ha scritto:

ma un bicilindrico diesel non la smonta la macchina?
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beckervdo · 25 Gennaio 2011

addlightness ha scritto:

cranckcase, non crankshaft :wink:
ma un bicilindrico diesel non la smonta la macchina?
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BMWX6 · 28 Gennaio 2011

che figata...ma quando faranno le auto con questa linea!!!

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Ufficiale: Volkswagen XL1 Concept

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