The cylinder head is designed as a typical 4V state of the art cylinder head as used in high performance HSDI diesel engines. The valves are actuated with roller cam followers to reduce friction and to increase the center distance of the camshafts because of the small valve angles (intake 2°, exhaust 3°). This allows sprockets with a sufficient diameter for the conventional chain drive valve train.
The exhaust ports are standard and are directed towards the turbocharger to keep the distance between exhaust valve and turbine as short as possible.
The common rail injection with a working pressure of 1600 bar uses solenoid type injectors and a common rail fuel injection pump. With these injectors it is possible to have two pre-injections, one main injection and 2 post injections during one injection period. The injectors are positioned facing into the center of the cylinder bore to realize the best conditions for the injection in the direction of the piston recess typically used for direct injected engines.
The piston shows a typical shape as used for DI (Direct Injection) diesel engines. The top shape of the piston is influenced by the valve overlap in top dead center. The valve overlap was optimized with AVL BOOST.
<< Previous Page
Next Page >>