Closed Loop Design for Electronic Diesel Injection Systems

Consumer expectations of automotive diesel performance combined with stringent emission statutes have accelerated the development of electronically controlled diesel fuel injection systems which provide precise control of the quantity of fuel injected and the timing of injection. A comparison of closed loop and open loop control techniques in this application is presented with closed loop control shown to exhibit superior accuracy, response time and disturbance input rejection characteristics while offering the potential of relaxed actuator specifications.