🔍 Key Concepts

• Fuel atomization and why small droplets are important in diesel combustion • How fuel nozzle design affects spray pattern and droplet size • The difference between pressure, timing, and combustion chamber shape in a diesel engine

💭 Think About

• Which factor acts directly at the point where fuel leaves the injector and breaks up into droplets? • Which options mainly affect when or where fuel is injected, rather than how finely it is broken up? • If you wanted to make the droplets finer without changing engine timing or chamber shape, what physical change would you make?

✅ Before You Answer

• Identify which choice changes the physical breakup of liquid fuel into droplets at the injector tip • Separate factors that control injection timing from those that control spray quality • Consider which part you would redesign to improve spray fineness and pattern in a diesel training or lab example