1989-02-01

Development and Experimental Study of a 1.1 L Turbocharged Intercooled Carburettor Engine 890458

Turbocharging and intercooling were applied to a 1.1 1 passenger car gasoline engine in order to achieve power and torque of a 1.6 1 naturally aspirated engine.
On the basis of standard production four cylinder OHC powerplant a prototype engine was developed featuring: turbocharger with integral wastegate, intercooler, pressurised carburettor and modified camshaft.
Extensive dynamometer testing was carried out with the main objective to investigate effects of various design parameters on turbocharger system behaviour and to select optimum values for a desired power increase. Following parameters were varied: boost pressure level, temperature and pressure drop across intercooler, turbine housings and valve timing. Fuel economy comparison shows that turbocharged engine can be advantageous in the low load - low speed region.

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