Manual download

Service. Self Study Programme 209 1.9 ltr. TDI Engine with Pump Injection System Design and Function 1 Something new has happened to the diesel engine The demands on the modern diesel engine with The pump injection system meets these tough regard to performance, fuel economy, exhaust requirements. emissions and noise levels are growing constantly. Even Rudolf Diesel thought about combining the Good mixture preparation is a key factor for injection pump and injector in one unit in order to meeting these requirements. dispense with high pressure lines and thereby This calls for efficient injection systems which achieve high injection pressures. However, he did produce high injection pressures to ensure that not have the technical means to put this idea into fuel is atomised very finely. Also, it is necessary to practice. precisely control the commencement of fuel injection and injection quantity. This is how it might have looked In 1905, Rudolf Diesel came up with the idea of a pump injector. 209 03 Diesel engines with mechanically controlled A step into the future, this engine meets the tough pump injection systems have been in use in ships demands on performance and clean emissions. and trucks since the 1950s. At this rate, Rudolf Diesel s vision of smoke For the first time, Volkswagen, in association with and odour free exhaust gases“ will one day Robert Bosch AG, has succeeded in developing a become reality. diesel engine with a solenoid valve controlled pump injection system suitable for use in passenger cars. New Important Note The Self Study Programme Please always refer to the relevant Service Literature is not a Workshop Manual. for all inspection, adjustment and repair instructions. Table of contents Introduction 4 Specifications Pump injection system . 6 General Structural design Driving mechanism Injection cycle Fuel supply . 18 Diagram of fuel circu