Turbocharged diesel engine (VW Golf 3)

Diesel engines have been using internal mixture formation in a swirl chamber and combustion chamber for a relatively long time (compared to a gasoline engine). The maximum number of revolutions of a diesel engine is therefore limited, otherwise it operates uneconomically. By supplying more air for ignition, better filling of the cylinders is achieved.

Essentially, the turbocharger consists of two vane wheels on one shaft. The exhaust gases of the engine pass through one of them (1) and the shaft rotates faster or slower depending on the engine speed. The second vane wheel (2) connected to it naturally rotates with it and directs the drawn-in air - now under pressure - into the combustion chamber, which is why the air-hungry diesel engine revs up to a higher power output. The increased air flow from the turbocharger must be in "agreement" with the high-pressure fuel pump. This is achieved by enriching the boost pressure, which doses a little more fuel depending on the boost pressure. There should not be too much fuel either, otherwise the proportion of soot in the exhaust gases increases. In addition, the catalytic converter only works optimally when there is a sufficient amount of air during combustion.

[View the original article on the resource: vwmanual.ru]