Injection-rate control consists of the subfunctions
• Injection-rate calculation
• Injection-rate metering
Injection-rate calculation computes the quantity of fuel to be injected on the basis of the current operating point of engine and car. A distinction is drawn between injection-rate calculation with the car on the move and injection-rate calculation during the start phase. The computed injection-rate signals are sent to injection-rate metering. Injection-rate metering converts the information into start of activation and activation duration for the advance, main and post-injection phases of the process.