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Wolfsburg, Germany- Volkswagen has extended the engine line-up for the Passat, its successful mid-size model. The saloon and the estate versions are now available with a 100 kW/136 hp four-cylinder turbo diesel engine. The 2.0-litre TDI with a six-speed manual gearbox is fitted with a diesel particulate filter as standard.
The additive-assisted diesel particulate filter is located away from the engine in the vehicle underbody. Its housing is made of stainless steel and contains an innovative filter block made of silicon carbide (Si-SiC) with alternate inlet and outlet channels. The inlet channels facing the engine form a “cul-de-sac” for the soot particles. Only the exhaust gasses are able to pass through the porous ceramic wall into the neighbouring outlet channel.
The retained soot particles are incinerated at approximately 500 degrees centigrade to prevent the filter clogging and to enable it to regenerate continuously. For this purpose, an iron-based additive is put into the diesel fuel to enable the particulate matter to burn at this low temperature and to reduce ash, thus giving the filter a long service life.
Volkswagen follows a long-term strategy for the reduction of exhaust emissions. It covers not only diesel particulate matter but all other exhaust components such as hydrocarbons and nitrogen oxides. Several years ago Volkswagen initiated a huge programme to optimise the internal combustion process and to reduce the soot output of diesel engines. And has been successful: in 1999 Volkswagen introduced the Lupo 3L TDI to the market, a vehicle that conforms with the stringent Euro 4 exhaust emission standard. Euro 4 is due to take effect in 2005 – six years after the Lupo 3L TDI fulfilled its rigorous specifications. Today 65 percent of all Volkswagen’s new diesel engines comply with Euro 4.
The Passat 2.0 TDI with a six-speed gearbox and diesel particulate filter is not only clean, it also offers the well-known advantages and features of TDI technology. It has a maximum torque of 335 Newtonmetres at 1,900 rpm. The saloon and the estate have top speeds of 211 km/h and 205 km/h respectively. The Passat accelerates from zero to 100 km/h in 9.8 seconds. It consumes 6.1 litres of diesel per 100 kilometres (estate version 6.3 litres). The Passat saloon has a starting price of 25,780 euros, and the estate version 26,855 euros.