Sparking Plugs TRIZ Cases

Dual swirl chambers improve air-fuel mixing and stable combustion, raising exhaust aftertreatment temperature with lower fuel use.

Real-time spark energy adjustment predicts SOC from spark location and flow velocity to curb knock, backfire, and preignition in H2-ICEs.

By recessing the ground electrode inside the housing, this spark plug cuts heat absorption and improves heat dissipation in high-thermal-load engines.

A circumferential magnetic field bends the spark deeper into the combustion chamber, improving ignition while reducing igniter heat and corrosion.

A low-permittivity crystalline oxide in an amorphous oxide matrix cuts electromagnetic radiation while keeping spark plug resistance stable over life.

Controlled shell dimensions and packing pressure cut spark plug gas leakage while avoiding insulator cracking under crimping force.

Two opposed noble metal spark faces cut noble metal use and simplify pre-chamber spark plug production while preserving wear life.

Curved recessed portions in the center electrode cut combustion-driven bending stress while preserving spark ignitability and durability.

Offsetting the ground electrode spreads discharge points, cuts spark erosion, and drives swirl-assisted flame propagation for faster combustion.

A ground electrode with an S/E ratio of 13.1 or less improves heat transfer to the metal shell and helps prevent pre-ignition.

Specific A/B and angle limits in a welded center electrode reduce field concentration at the melted portion while stabilizing flame kernel generation.

A sloped shell opening keeps spark plug threads from tilting forward, reducing biting in engine threaded holes during installation and removal.