The base powertrain, a 1.9-litre suction motor, delivers 47 kW at 4,400 rpm and 124 Nm of torque at 2,000 rpm.
The second engine, a slightly more sophisticated turbodiesel, achieves 55 kW of power with the same working volume. The torque is 150 Nm at 2400 rpm.
Due to the catalytic technology combined with turbocharging, the amount of harmful substances in the exhaust gases - carbon monoxide CO and hydrocarbon HC - is reduced even more significantly. Both engines, in terms of their exhaust qualities, are on the level of gasoline engines with a very good catalyst with a lambda probe device.
The further development of diesel engines with a displacement of 1.6 liters to engines with a displacement of 1.9 liters required major changes. engine block «grew up» in height by 16.5 mm and the piston stroke reached 95.5 mm. the highest value among four-cylinder Volkswagen engines. Experts call first of all a long move. which is a characteristic property of good throughput. The disadvantage is the high speeds that arise due to the long stroke of the pistons, but this does not play a big role in a diesel engine with its inherent low speed. The cylinder diameter has increased to 79.5 mm. Thus. in total, an additional 0.3 liters of working volume is obtained.
Numerous measures have been taken for a comfortable ride and a more desirable noise level: a reshaped swirl chamber, a valve measuring diameter, a new camshaft lobe profile and a crankshaft with reduced bearing clearance. For low vibration transmission, the cylinder head cover gasket consists of two shells that are screwed to the cover in the middle; the camshaft bearings are no longer connected to the side wall of the cylinder head. oil sump also «unleashed», it connects to the block through a rubber gasket. The engine block became stiffer and as an additional measure the pulley on the crankshaft received a shock absorber.
Here you can see a partial discharge of the engine, from which you can understand where the swirl chamber is built into the cylinder head.
The space around the vortex chamber is shown with magnification. The arrows symbolize the hot air that is compressed by the piston during the compression stroke in the vortex deck. The injected fuel is swirled by the rapid movement of hot air and can ignite well.
1 - nozzle
2 - glow plug
3 - vortex chamber
4 - "shuss"-channel
5 - piston
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