ruiskutuspumppu

Ruiskutuspumppu, also known as an injection pump, is a critical component in internal combustion engines, particularly diesel engines, and some gasoline direct injection systems. Its primary function is to deliver fuel under high pressure and in precise amounts to the engine's cylinders for combustion.

There are several types of injection pumps, including distributor pumps and inline pumps. Distributor pumps, often found in older diesel engines, use a central rotor to distribute fuel to individual injectors. Inline pumps, typically found in larger diesel engines, have a separate pumping element for each cylinder, arranged in a line.

The operation of a ruiskutuspumppu involves a camshaft or other driving mechanism that actuates plungers. These plungers compress the fuel, creating the necessary high pressure. The timing and duration of the plunger's movement are precisely controlled to regulate the amount of fuel injected and the timing of the injection event, which directly impacts engine performance, fuel efficiency, and emissions.

Modern injection pumps often incorporate sophisticated electronic controls. These electronic control units (ECUs) receive input from various engine sensors, such as engine speed, throttle position, and air temperature, to optimize fuel delivery in real-time. This allows for more precise fuel metering, improved combustion, and reduced pollutant formation. Over time, wear and tear can affect the pump's performance, leading to issues like poor starting, rough running, or reduced power.