Gentlemen,
I want to build an experimental test rig for controlling a 5 cylinder diesel engine. Obviously no ignition circuitry is required; it's just the fuel injector pulsing I need to worry about. The injector solenoids in question are very low DC resistance (~0.3 ohms!) and suck about 30A through current-limiting resistors when actuated. Now, the duty cycle is very, very small. A firing event only occurs every two revolutions (per cylinder) and typically lasts just a few milliseconds. The range of RPM is from 700 to 4000 in this case. So, which active device would make the best driver? This is strictly a one-off experiment so there are no production/cost considerations to worry about, BTW.