How does an electronic fuel injection system work?
In a mechanical system, the injector is spring-loaded into the closed position and is opened by fuel pressure. The injector in an electronic system is also held closed by a spring, but is opened by an electromagnet built into the injector body. The electronic control unit determines how long the injector stays open.
How often does the fuel injector get a pulse?
6) The ECM provides a pulsed ground to activate the fuel injector. 7) At idle, most ECMs give the injector about a 3 to 5 milli second pulse. During cranking the pulse may reach over 20 milli seconds. 8) The best way to determine fuel flow pulse is not using injector pulse width, is by doing a duty cycle test with the multi-meter.
How does the Lucas mechanical fuel injection system work?
Lucas mechanical fuel injection system In the Lucas system, fuel from the tank is pumped at high pressure to a fuel accumulator. From there it passes into the fuel distributor, which sends a burst of fuel to each injector, from where it is fired into the inlet port.
Why are fuel injection systems important for two stroke engines?
Fuel injection systems are indispensable to the improvement of two-stroke engines to enhance their advantages in automotive engine applications. There are numerous reports of injector developments [35–42] but very few contain sufficient information related to the detailed spray droplet characterization.
A type of electronic fuel injection system that uses a single injector or pair of injectors mounted in a centrally located throttle body. The throttle unit resembles a carburetor except that there is no fuel bowl float or metering jets.
How does the engine control unit control the injector pulse?
Question: What controls the fuel injector pulse? Ans: The engine control unit is the electronic brain that used to control the fuel injector pulse by gathering data from various sensors along the fuel line
Why does my fuel injector have a long pulse width?
You can observe problems with the fuel injector in a variety of ways. A fuel smell coming from the engine compartment, for example, might mean that the fuel injector is creating a pulse width that is too long. A misfiring of the engine or a decrease in power, acceleration, or speed might be symptoms of a failing fuel injector.
How is fuel injection controlled by the ECU?
The injection is controlled by the ECU. It determines the amount of fuel to injected and in some system if the engine is cold, turns on an “extra” injector which only works while the system is cold. This injector only works for a short period of time determined by the ECU.