This paper on "Miniaturisation of Electro-Mechanical Actuators for Fuel Injection Systems" was presented at the NAFEMS World Congress on The Evolution of Product Simulation From Established Methods to Virtual Testing & Prototyping - 24-28 April 2001, The Grand Hotel, Lake Como, Italy.

Summary

Solenoid actuators are electro-mechanical devices that convert electrical energy into mechanical energy associated with linear motion. They are used in a wide range of engineering applications such as fuel-injection systems, starting motors, ABS systems etc. This research focuses in particular on modern solenoid driven fuel injectors. With the growing sophistication of solenoid devices the cost of both design and production has gained particular importance in recent years. Today's small, high-speed engine demands a lightweight and compact fuel-injection system. From industry's perspective there is an increasing need for miniaturised solenoid valves. Further reduction in size can be achieved only by further reducing the size of the actuating devices. This paper presents a computer-based design model of a fast-acting solenoid driven fuel injector capable of simulating the entire systems behaviour during actuation. Using the finite element-based approach, the main parameters (such as force, inductance and energy) of this type of electromechanical device have been evaluated. The developed virtual design model represents a basis for miniaturising the solenoid design, by providing the means for simulating the performance of the fuel injector for different design parameters and operating conditions.