Description And Operation: Engine: Overview

The GTDi (gasoline turbocharged direct injection) 2.0L petrol engine is an in-line, double overhead camshaft, 4 cylinder engine, which is transverse mounted in the engine compartment. The engine weight is kept to a minimum by using aluminum for the cylinder block, cylinder head and oil pan.

The engine uses a Bosch HP (high pressure) DI (direct injection) fuel system with fuel pressure provided by a HP pump, driven from the exhaust camshaft. The fuel system is a returnless system using 7 hole injectors to supply the cylinders.

The double overhead camshafts use variable camshaft timing (VCT) which allows the timing of the intake and exhaust valves to be adjusted independently of each other. The system is operated by 2 VCT solenoids which are controlled by the engine control module (ECM) using information from 2 camshaft position (CMP) sensors.

The DI fuel system uses a camshaft driven HP fuel pump to supply a fuel rail with pressurized fuel. The fuel rail delivers fuel at a controlled pressure to all 4 fuel injectors. The DI fuel system, along with advanced piston and combustion chamber design and the turbocharger provide improved fuel consumption and reduced emissions.