Injection Strategies

Injection Strategies







Use of 6-port fuel injectors makes a significant contribution to mixture preparation. The 6-port injectors are designed to ensure optimum homogenization of the fuel-air mixture under any engine operating conditions. The maximum injection time at full throttle is 5 milliseconds. The injection method is designed for operation with homogeneous mixture formation. With the exception of cold start and warm-up, the entire fuel quantity is injected into the combustion chamber during intake.

First engine start

High-pressure stratified charge injection is achieved in the starting phase of the engine. The fuel pressure is increased to 2025 psi (45) - 1450 psi (100 bar). The value for the fuel pressure and the injection strategy depend on the engine temperature.

Warm start

At coolant temperatures over 104° F. (40° C.), map-controlled single injection takes place during the intake stroke.

From 14° F. (-10° C.) to 104° F. (40° C.)

The catalytic converters are heated by means of dual injection (homogeneous split HOSP). The fuel, which is split into two smaller quantities, is injected into the combustion chamber at different times. The time windows for injection are before and after the bottom dead center of the piston. The intake valves are already closed at the time of the second injection.

Below 14° F. (-10° C.)

Single injection with high fuel pressure based on a map stored in the DME control unit takes place.