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Brief description

Brief description

Description

Compared to a conventional induction engine, the turbocharged engine has better filling during the induction stroke, which leads to more efficient combustion, increased power, higher torque and lower fuel combustion. That is to say, performance can be compared to that of a larger engine while retaining the benefits of a smaller engine as regards fuel economy, space, weight, etc.

Turbocharging is obtained via a turbocharger, which means that engine exhaust gases are used as driving energy. The exhaust gases are led into a turbine housing with variable vanes (VNT - Variable Nozzle Turbine).

Engine exhaust gases cause a turbine wheel to rotate. This wheel is directly connected to a compressor impeller via a shaft, thus the compressor impeller rotates at the same speed as the turbine wheel. The compressor impeller increases the pressure in the induction system, which causes more air to enter the engine. This makes is possible to combust more fuel and results and higher torque and output. The engine control module regulates this procedure by controlling vane position, etc.

The opening of the vans are adapted to the current operating conditions - usually a small opening at low engine load. At higher engine load the vanes open. In this manner, turbine speed and thereby the degree of turbocharging are regulated.

The turbocharger is designed to begin working at a relatively low engine speed, giving the engine a higher torque in the rpm range used during normal driving conditions. The high torque and short turbocharger delay make the car smooth and comfortable to drive.

The turbine housing of the turbocharger is integrated into a single unit with the engine exhaust manifold.