Fuel Injection Apparatus TRIZ Cases

A spring-loaded check valve blocks fuel flow between the high-pressure accumulator and injector.

A fuel injection valve sleeve uses a segmented seat design to maintain axial force balance without requiring stronger actuators.

A multilayer piezoelectric actuator uses a segmented external electrode with an elastic structure to absorb mechanical stress.

Tapered injection holes expand fuel sectional area to enhance atomization, reducing particulate matter generation from unatomized droplets.

Asymmetric injection hole walls restrict liquid film spread, resolving spray instability caused by unpredictable fuel distribution.

Dynamic torque adjustment reduces energy consumption while maintaining driving stability and agility across varying speeds.

Hydraulic pressure positions a bypass cylinder to block fuel flow during abnormal fastening, preventing leakage when ambient noise masks connection sounds.

Slanted convex curved surfaces maintain extended contact area despite misalignment, reducing stress and wear while simplifying manufacturing tolerances.

Reduced-diameter armature bolt sections enable self-centering sealing, lowering production costs while maintaining high-pressure leak prevention.

A hydraulic valve uses opposing magnetic actuators to drive a control member, replacing mechanical springs with electromagnetic force.

Varying recess dimensions in a tubular spring distribute circumferential loads evenly, eliminating uneven deformation without welding abutting edges.

Tapered attracting surfaces increase damper force to reduce core collision speed, preventing wear while maintaining rapid valve opening response.

Serpentine passages heat fuel via injector surfaces, eliminating separate heat exchangers and reducing soot production.

A fuel level monitoring system calculates remaining run time for engine-driven welding generators.

A fuel injector control valve uses an annular compensation chamber to balance internal pressures and stabilize the sealing rod.

Flexible prongs on an integrated alignment tab enable quick insertion and strong retention, preventing misalignment during shipment.

Co-moulding merges the tubular support and pleated filter element into one piece, eliminating separate assembly steps that cause impurity deposition.

A 3-way valve assembly incorporates a leak vent to divert fuel past the bore.

Two-phase duplex steel separates magnetic flux without weld seams, reducing production costs while maintaining mechanical strength under high pressure.

A nozzle needle tip with a convex section between conical edges guides fuel flow to reduce cavitation in partial stroke ranges.

Relocating stroke adjustment to the valve chamber eliminates high-precision manufacturing requirements for the low-pressure guide body.

An unthrottled inlet channel connects directly to a high-pressure fuel supply within the injector body.

An integrated igniter uses spatially offset spark gaps to prevent liquid fuel fouling, maintaining combustion stability.

Overprinted multi-layer heating elements resolve non-uniform resistance in fuel injectors, eliminating static mixers and improving atomization.

A pneumatic emergency shut-off valve uses spring force to maintain a closed position when not actuated.