What injection strategy regulates the amount of fuel injected per crank angle rotation?

The rate-shaped injection strategy is specifically designed to control the volume of fuel that is injected into the combustion chamber based on the crank angle rotation. This method allows for precise modulation of fuel delivery, contributing to efficient combustion and performance optimization in diesel engines. With rate-shaped injection, the injection profile can be tailored to match various engine operating conditions, such as load and speed, which helps in achieving better emissions control and fuel efficiency.

In contrast, the constant injection method delivers a fixed amount of fuel regardless of engine speed or load, which can lead to inefficiencies. Pulsed injection, while it may involve multiple injections over a single cycle, does not inherently provide the fine control over the fuel amount per crank angle that rate-shaped injection does. Continuous injection delivers fuel in a steady stream, which lacks the adjustable characteristics provided by rate-shaped injection. This flexibility in the rate-shaped strategy is what makes it advantageous for modern engine management systems aimed at optimizing performance.