Ruiskutuspulssit

Ruiskutuspulssit, in Finnish, refers to the duration of time that an engine's fuel injector remains open. This duration is a critical parameter in determining the amount of fuel injected into the combustion chamber. The engine control unit (ECU) precisely manages these pulse widths to achieve the optimal air-fuel ratio for various operating conditions.

The length of the injection pulse is measured in milliseconds and is directly proportional to the fuel quantity delivered. A longer pulse width means more fuel is injected, while a shorter pulse width results in less fuel. The ECU calculates the required pulse width based on numerous sensor inputs, including engine speed (RPM), throttle position, manifold absolute pressure (MAP), engine coolant temperature, and oxygen sensor readings.

Factors influencing ruiskutuspulssit include the engine's load, acceleration requirements, and emissions control strategies. For instance, during heavy acceleration, the ECU will command longer injection pulses to provide more power. Conversely, during idling or deceleration, the pulses will be shorter to conserve fuel and reduce emissions. The efficiency of the fuel delivery system, including injector response time and fuel pressure, also plays a role in the accuracy of the injected fuel quantity. Precise control of ruiskutuspulssit is essential for optimal engine performance, fuel economy, and reduced pollutant emissions.