Turbocharger (Audi 80 B3)

The AUDI 80/90 diesel engine with a power of 59 kW (80 hp) is equipped with a turbocharger. On the turbocharger shaft there are two turbine wheels, gas and air, located in two separate housings. The turbine wheels are driven by exhaust gases from the engine. At the same time, the turbocharger shaft rotates at a speed of 12,000 rpm, forcing air into the cylinders, which creates good filling of the cylinders.

Thanks to such filling, the engine power increases up to 100%. The degree of increase in engine power depends on the injection pressure, which is 0.4-0.8 bar (the air pressure in the tires is 1.8 bar). If the discharge pressure exceeds the factory set value, the valve opens and the pressure can decrease.

In addition to increasing power, the turbocharger increases torque, which primarily contributes to smoother engine operation. As a rule, the engine must have a speed of about 3000 rpm for the boost pressure to be noticeable.

In contrast to a petrol engine, a diesel engine has a high compression ratio, which promotes complete combustion of fuel even in the low rev range.

The turbocharger is a very precise design. Therefore, it is recommended to repair it only in a specialized workshop. As a rule, if there is a malfunction, the turbocharger is replaced as a set.

[The full version is posted on the resource: AUDIMANUAL.ru]