Electromechanical actuators operate diesel fuel injectors. Superior fuel injection requires an actuator that is both capable* and durable.

Actuator Types

• Solenoid. Vintage 1913, injectors still use solenoids to port high pressure fuel to only open or close the injector needle. Solenoid injectors are durable.
  
  
• Piezoelectric Ceramic. The many benefits of a piezoelectric actuator directly operating a needle may be found here. Piezoelectric injectors are capable.
  
  
• Magnetostrictve. Figure 6 of US Patent 9,903,326 "Fuel injector having a magnetostrictive actuator device" describes one such device. This magnetostrictive injector is durable.

QCW offers to develop a magnetostrictive actuator to operate a diesel fuel injector. Key characteristics unique to terfenol-d enable it to be both capable and durable:

• Composition
• Magnetostriction
• Force and Expansion
• Speed
• Temperature
• Fracture Mechanics
• Reliability
• Fatigue
• Precision

Engine operation benefits include:

• More fuel economy
• Less emissions
• Fuel flexibility
• Less knock
• Retrofittable
• Any combination of the above

*A capable fuel injector could implement Carnot's maxim: heat not used to expand matter is wasted. For a piston engine, Rudolf Diesel distilled this as: admit the combustible gradually. This requires the injector nozzle size to be variable, not fixed. Interestingly, Diesel himself observed: "during the easy running of the engine, one can scarcely perceive the beginnings of the power stroke." In other words, it was quiet.