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.

An integrated fuel injector igniter merges ignition conductors and valve assemblies into a compact unit.

Different hardness levels in the sealing area prevent plastic deformation while a seamless transition simplifies manufacturing for improved leak resistance.

A multi-shank extraction apparatus features a transverse degree of freedom for simultaneous injector removal.

A machining tool uses a pivotable electrode element to position the cathode precisely within the working gap for fuel injection device fabrication.

Metal injection moulding forms sealing seats with integrated injection holes using pre-shaped punches, eliminating slow electric-discharge machining.

An eccentric counter bore in the fuel injector spreading section prevents wall obstruction while maintaining spray penetration and linearity.

Multi-layer piezoelectric element with extended external electrode plate and wider conductive bonding region.

A specialized kit extracts and installs JET filters in engine fuel pumps using a magnetic tip and centering guide.

A modular fuel delivery system houses a pump and pressure regulator in one unit to simplify engine implementation.

A fuel injection valve design increases main flow rate through specific hole volume geometry.

Parallel feeding of the second propellant simplifies assembly and flow rate calibration in tricoaxial injectors.

A fuel injector assembly routes spent actuating fuel through a dedicated flushing drain to exchange heat with internal components.

An integrated flow fuse in the fuel pipe isolates leaking injectors, preventing cylinder damage and reducing system complexity.

A valve needle with a curved third region guides fuel flow through injection nozzle outlets.

A valve arrangement directs fluid jets away from the armature using a flow redirecting region to minimize closing resistance.

Periodic impact forces overcome static friction during assembly, eliminating elastic compression risks and improving dimensional accuracy.

Apertured retainer walls filter debris from lubricating oil, protecting downstream gear trains from damage caused by failed pump components.

Variable needle lift controls spray penetration force directionally, preventing uniform hole changes and reducing piston adhesion.

An electromagnetic actuator moves an armature member to vary control chamber pressure and drive the injector needle.

A double-acting solenoid actuator uses a permanent magnet and dual coils to position the armature.

Multi-layer piezoelectric element uses asymmetric electrode spacing to manage thermal expansion differences between active and inactive sections.

A spark plug metal housing uses localized heat treatment to create a hardness gradient between the threaded portion and the crimp section.

Segmented plates secure vehicle injectors to engine heads via lateral threaded holes, eliminating lateral thrust and reducing space occupation.

A flow control system uses a shuttle valve to manage fluid pressure in diesel fuel injectors.

Integrated elastic contact element braces piezo control unit, compensating thermal expansion and vibration stress.