Fuel Injection Apparatus TRIZ Cases

A wire-surrounding seal in the injector passageway prevents fuel leakage and maintains electrical connectivity under engine vibration.

An integrated coil, yoke, cover, and molded structure cuts fuel pump assembly steps while suppressing electromagnetic valve operation sound.

Maintains bias pressure between liquid and gaseous fuels with a self-actuating valve to reduce leakage and stabilize fuel injection.

Angling the nozzle orifice toward the reception hole avoids laser damage to the blind hole wall while producing smoother bores and lower emissions.

Angling the laser-drilled spray hole away from the seat region prevents blind-hole damage while preserving smooth, reproducible fuel nozzle bores.

A recessed rail-body end accommodates a thick end-cap wall, removing the boundary step and preventing load concentration under high fuel pressure.

Non-coaxial opening axes let a high-pressure fuel pump fit offset layouts while reducing transverse forces, leaks, and connection strain.

EDM-machined sidewall passages connect injector cups to the main fuel channel without weakening the high-pressure rail or adding contamination.

A non-coaxial connection fitting lets high-pressure fuel pumps bridge offset outlets while reducing leak risk, transverse force, and thread strain.

Controlled steel composition and low-pressure autofrettage raise fuel injection pipe burst pressure while preserving fatigue life and workability.

A recessed end cap wall removes the boundary step in a gasoline direct injection rail, spreading pressure and preventing high-pressure damage.

A pressure-responsive valve inside the fuel connector creates an orifice during flowback to damp low-pressure pipe pulsation without added dampers.

A gas-pocket damping chamber paired with a separate recovery chamber cuts fuel pulsation noise, stress, and packaging limits in high-pressure injection.

By sampling gate voltage instead of high-power output, this circuit converts oscillator frequency to voltage without sense losses or costly sensors.

A curved hole centerline with increasing radius cuts inlet cavitation and erosion, enabling small sac volume and multiple injector holes.

Asymmetric nozzle inlet curvature balances fuel flow and suppresses cavitation-driven adhesion on the nozzle surface while maintaining injection pressure.

Zone-specific guide clearance balances pressure-induced rod forces, reducing friction and misalignment in hydraulic injector valves.

An integrated needle body and funnel-shaped chamber raise fuel flow at low pressure while improving flow stability and reducing injector complexity.

Compressed-air impact and extraction forces dislodge seized fuel injectors quickly while avoiding damage from collet-based removal.

A curved flat nozzle outlet improves fuel film uniformity, atomization, and wall-fuel evaporation to cut particulate matter at low temperatures.

Protective assemblies segment and guide a piezoelectric stack to prevent fracture, reduce friction, and preserve long-stroke stability.

Compressed-gas impact motion replaces manual pulling to speed fuel injector disassembly and improve access in long, narrow spaces.

Profiled nozzle check geometry redirects high-velocity fuel away from sac walls and check seats to limit cavitation erosion in injectors.

Switchable series and parallel pump wiring matches fuel demand while cutting excess power use, heat generation, and overdelivery.

Different spray-hole shapes across injector rows balance fuel flow, reduce preferential cavitation, and help protect the nozzle structure.

Direct heavy-fuel injection can cause uneven delivery and carbon buildup; a crankcase diverter redirects fuel toward the piston.

A PWM-controlled conductor and semiconductor switches combine two fuel pumps in series or parallel to reduce excess power and heat.

This fuel injector case uses separate plunger flow-control portions to linearize fuel flow and improve injection accuracy.

Suck-chamber jetting limits fuel deposition and soot at the injector front end.

This aircraft engine case combines carburetor and EFI subsystems, switching modes to improve air-fuel control without full EFI replacement.

A fuel injection valve uses a pot-shaped magnetic circuit component and thin-walled sleeve body to create a sealed coil space.

An eccentric step surface in a fuel injector port minimizes fuel attraction to prevent deposits while maintaining consistent flow direction.

A fuel injector removal adapter engages the component laterally via an internal ridge to distribute extraction force across the strongest structural areas.

A fuel injection device uses a close assistance piston to prevent fuel discharge from the nozzle body.

Graded surface roughness on the stacked body side face relaxes stress concentration at the center, enhancing durability against crack development.

Flow-directing sleeve channels cooling fuel through the injector body to manage heat transfer from intense pressurization.