owners manual VW Transporter T4

owners manual VW Transporter T4 - year of production: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 - VW Transporter T4 Westfalia oweners manual EN

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text version of content this owner's manual page from owners manual to the vehicle VW Transporter T4, year of production 1990 - 2003:

TECHNICAL DESCRIPTION Emission control system<122> zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA The exhaust emission control system effec- The Lambda probe* is fitted in the ex- tively reduces the amount of pollutants in haust pipe where it measures the exhaust the exhaust gas. gas composition continuously. The informa- tion signal is fed to an electronic control unit Petrol engines which in turn regulates the mixture forma- The main parts of the emission control sys- tion system so that the mixture is kept con- tem are stantly correct. a mixture formation system which guar- The exhaust emission control system tech- antees very exact composition of the air/pe- nology is so well developed that no addi- trol mixture at all engine speeds tional maintenance whatsoever is required. the catalytic converter To maintain the effectiveness of the the Lambda probe1' emission control system, the following must be noted: The catalytic converter is installed in )B19- 129 Only fill up with unleaded petrol - see In this process three pollutants (three-way the exhaust system. It consists of a steel- page 86. catalytic converter) are converted as fol- cased ceramic or metal body containing a Never run tank completely empty - see lows. multitude of longitudinal passages which page 85. are vapour coated with a thin layer of plati- Carbon monoxide to carbon dioxide num or rhodium. Do not overfill engine oil - see page 98. Hydrocarbons to water Do not switch off ignition whilst driving Nitrogen oxide to nitrogen (four fifths of The exhaust gas flows through the catalytic - see page 39. the air we breathe is nitrogen). Do not tow start vehicle for more than converter and reacts with an afterburning A stipulation for the proper functioning of process when it contacts the precious 50 m-see page 133. metal coating. the catalytic converter, however, is that the exhaust gas has a certain specific composi- tion and minimum temperature when it enters the catalytic converter. To obtain this composition, exact regulation of the fuel/air mixture is required. Avery exact regulation is obtained with a Lambda probe. Lambda = Air/petrol relationship www.WestfaliaT4.info - a useful website for owners and enthusiasts of VW Westfalia T4 Transporter / Eurovan Campervans 137

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year of production from: 1990

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