Fuel Injection Apparatus TRIZ Cases

A fuel injection nozzle uses a Laval shape between the seat and needle tip to accelerate fluid flow.

A piezo actuator valve unit moves the housing away from the valve element to lift it off the seat.

Relocating a fuel injector spring into a low-pressure zone protects the component from high-pressure cavitation damage.

A manual screwing device couples drive and receiving bodies until a set torque is reached, then decouples to allow precise angle tightening.

Grouped capacitors prioritize charging to stabilize voltage fluctuations and improve injection timing.

Radial fluid diverting slots and circumferential swirling slots segment the fuel beam into multiple streams, creating turbulence that refines particle size.

Segmented valve body with distinct guide and seat curvature radii maintains precise needle positioning under high fuel pressure.

Asymmetric port geometry on concentric circles prevents fuel flow separation and tip adhesion, reducing unburned particles.

Sliding the mounting guide moves locking members to engage a ring, resolving disengagement difficulty and reducing manufacturing costs.

A rotary member reconfigures fuel supply and return lines to prevent system damage.

A fuel injection nozzle design optimizes sac chamber geometry to enhance flow rate coefficient and stabilize fuel delivery.

A multi-layer piezoelectric element incorporates voids at the joining interface between the stacked body and external electrode to reduce mechanical stress.

Axially spaced actuators share a lateral electrical connector module to reduce injector height and part count.

A fuel injection valve throttle portion changes minimum flow path area based on needle position to control fluid dynamics.

A fuel injector uses a hydraulic force amplifier to move the needle, reducing early drift and stabilizing fuel pressure distribution.

Segmenting the tapered movable core face with recess parts sections fuel oil films to eliminate sticking delays and improve valve-closing responsiveness.

A cradle frame body cover uses a laterally swelling side section to house heavy electrical components within the vehicle structure.

Resin fills the gap between the core and housing inner surface, blocking moisture infiltration that causes leak currents and unstable injection characteristics.

Threaded fastening enables quick fuel jet diameter changes without damaging the carburetor main body.

Series transfer meters calibrate field provers alongside master units, reducing calculation complexity and measurement uncertainty.

Segmented dual pumps operate out of phase to cancel pressure pulsations, while a dual-valve injector adapts delivery without adding system cost.

Metal phases at electrode boundaries disperse electric fields, reducing stress concentration and enhancing durability of the laminated piezoelectric element.

A common rail injector uses a housing-fixed sleeve to constrain nozzle needle travel.

A fuel injector cap fits over the trailing end of the injector body to create a dedicated backleak chamber.

A control chamber pipe divides the fuel injector valve bore into high and low pressure zones, reducing throttling effects.

A fuel injection valve uses a two-stage throttle mechanism to control flow.

Reciprocating piston throttles hydraulic fluid flow through varying cross-sectional areas to control actuation speed.

A connector block directs fuel from outer to inner lines within a modular rail system.

A fuel valve needle incorporates a third effective pressure surface to balance forces against resilient biasing.

Concave needle tip geometry reduces turbulence and enhances effective injection pressure for uniform spray pattern consistency.

A fuel injection yoke generates axial force to maintain magnetic throttle part position.

A fuel injection valve uses a convex stopper face to minimize contact area and reduce viscosity resistance for faster movement.

A cylindrical pushrod with a clamping structure enables controlled needle retraction, preventing unintentional movement and reducing residual drug liquor.

Segmented sealing layers with distinct metallic contents resolve vibration shock and gas-tightness trade-offs in engine spark plugs.

An annular groove at the valve member intersection reduces seat wear and maintains consistent fuel pressure distribution.