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Wolfsburg / Paris, September 2004 – At the Mondial de l’Automobile 2004 in Paris, Volkswagen will be showing five new TDI models with diesel particle filter (DPF): the Golf 2.0 TDI, the Phaeton V6 TDI and the Touareg as a V6 TDI and V10 TDI. The Passat 2.0 TDI, which is also fitted with DPF, can also be seen in the new Embassy version, specially conceived for the French market. The Volkswagens with DPF, like all the Golf TDIs without DPF, comply with the EU4 standard.
Self-cleaning diesel particle filter systems are used in the Golf, Phaeton and Touareg. In terms of function, they all share a passive and an active regeneration phase of the filter without the use of additives. The passive regeneration of the DPF is primarily effective in motorway driving in an exhaust gas temperature range from 350 to 500 degrees. Here, the soot that builds up in the catalytic converter is converted to CO2 continuously and without any special additional technical measures.
Active regeneration, on the other hand, kicks in during operating phases in the predominant partial load range of the engine, as is the norm in city traffic in particular. Every 1,000 to 1,200 km, the exhaust gas temperature is increased through an internal process to around 600 degrees and the accumulated soot is converted to CO2. Even with this type of filter regeneration, the additional diesel consumption is low, since the intervals between two cleaning phases are extremely long.
The driver cannot feel the regenerating processes taking place. In the medium term, Volkswagen will be extending the option of diesel particle filters to all model series. Depending on the vehicle type, the filters will be installed as standard (as with the new Phaeton V6 TDI, for example) or provided as an option.
The Golf with DPF: As far as Europe’s most successful car is concerned (1st half-year 2004), the 103 kW / 140 hp 2.0 TDI will be available with a DPF from the autumn. The 2.0 TDI is the first turbo diesel engine from Volkswagen whose innovative pump-nozzle direct injection has been supplemented by the components of four valve technology. In the version with diesel particle filter, it develops, like its filter-free counterpart (which is also classified under the EU4 standard) a maximum torque of a powerful 320 Newton metres (from 1,750 rpm). The four-cylinder engine has a six-speed gearbox as standard, or can be provided as an option with the world’s first Direct Shift Gearbox (DSG / six-speed automatic transmission without torque converter) to be used in series vehicles.
The Phaeton with DPF: Volkswagen will also be expanding the engine range of the Phaeton luxury saloon by a DPF turbo diesel Its new common rail system means, thanks to the use of piezo technology, that much smaller, more precisely measurable quantities of fuel can be injected. The positive effects are that noise, fuel consumption and emissions fall appreciably. Thus the saloon is one of the few in its class in the diesel sector to meet the requirements of the EU4 standard. The six-cylinder designed in the Volkswagen Group produces 165 kW / 225 hp and develops a maximum torque of 450 Nm practically from stationary (from 1,400 rpm).
The Phaeton V6 TDI 3.0 with 6-speed automatic gearbox (Tiptronic) and all-wheel drive as standard reaches a top speed of 234 km/h and can sprint from 0 to 100 km/h in just 8.8 seconds. On the other hand, the average consumption over 100 km is only 9.6 litres and the engine noise is at a pleasant level at any speed. The latest version of the Phaeton, which is equipped in general with four-corner air springing, is thus recommended as a saloon that will confidently glide over long distances and be a stress-free zone between the meetings that make up a busy day.
On the common rail side, the Phaeton’s 2,967 cc V6 TDI 3.0 represents one of the most advanced diesel technologies in the world. Volkswagen AG is pursuing a dual technology path here: Whilst, in the six and eight cylinder TDI range, common rail direct injection engines are used, it is the extremely efficient pump-injection engines that are installed in the three, four, five and ten cylinder TDIs. Two technologies, used depending on the requirement profile, both with the same aim: maximum torque with minimum consumption.
The Touareg with DPF: The V6 TDI 3.0 first used in the Phaeton will also be available for the Touareg – also with the diesel particle filter as standard. In the Touareg, the V6 – available with a six-speed manual and six-speed automatic transmission – produces the same 165 kW / 225 hp and gives a top speed of 203 km/h (automatic: 201 km/h). Average consumption is 10.6 litres over 100 km (automatic: 10.9 litres). The Touareg V6 TDI 3.0 is also one of the few upper class sports utility vehicles with diesel engine in the world to comply with the EU4 standard.
The most powerful passenger car turbo diesel in Europe – the V10 TDI – will also be available in combination with the Touareg as a DPF version. The performance and torque values of this exceptionally agile engine remain unchanged: 230 kW / 313 hp and 750 Nm.
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