🔍 Key Concepts

• Trunk-type diesel engine piston design and operating stresses • How piston crown/head handles gas pressure and temperature • Relationship between mechanical strength and heat flow/temperature limits in piston materials

💭 Think About

• When combustion pressure is highest, what must the piston crown structurally withstand in terms of stress and deformation? • How does very high temperature affect piston material properties, and what role does crown thickness play in controlling those temperatures? • If you make the crown very thick or very thin, what happens to both its ability to carry load and its ability to get rid of heat?

✅ Before You Answer

• Be clear on how gas pressure and inertia loads affect required section thickness for strength. • Consider how heat must conduct from the crown to the cooling surfaces and how thickness changes temperature gradients. • Ask: is it realistic that crown thickness would be determined by only strength, only heat dissipation, or would designers have to consider both effects together?