The Tdi engine properly capitalized on the late ninety and One Tens. The Tdi was intercooled, increasing its air charge while fuel input was increased by v new Bosh injection pump feeding Bosh injectors working at up to 270bar. The swirl chamber was eliminated in this direct injection engine, the combustion space being formed by a concave depression in the top of the piston. A lower compression ratio of 19.5 and an acoustic cover helped quieten the 200Tdi.
Cold starting was optimized by automatic heater plugs that were switched off by rising under bonnet temperature or throttle position, and assisted by an injection timing advance unit. Mechanically controlled exhaust gas recirculation EGR was introduced though the system had appeared year’s earlier on Australian specification series III models. Moves towered electronic control appeared in the last 300Tdi Discovery model fitted with electronic Diesel control EDC. These engines were controlled by Engine control module ECM which received signals from engine sensors and dictated timing, the amount of fuel injection and EGR operation.
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