Fuel Injecting Pumps TRIZ Cases

An inner and outer housing with an axially compressed elastomer ring blocks rainwater and saltwater from the inlet valve and helps suppress noise.

Arcuate follower surfaces improve cam-to-plunger motion transfer in high-pressure fuel pumps, reducing wear, scuffing losses, and fatigue.

A symmetric desmodromic lever keeps paired cam followers in constant contact, cutting noise and wear in multi-piston fuel pumps.

An insulative overmold seals the fuel pump coil, spool, and washer to block water ingress, prevent crevice corrosion, and protect solenoid operation.

A projecting portion and tapered annular seal support high-pressure delivery while limiting distortion, leakage, and plunger seizure.

An elastic recess in the first bearing eye absorbs thermal expansion, reducing stress and extending service life.

A fuel discharge line conveys heated fluid from the pump interior to the upper tappet chamber, preventing temperature rise in the main housing.

Angled members translate rider motion to increase plunger lift, resolving load capacity and stroke length trade-offs.

An elastomer connecting ring maintains the axial position of a high-pressure fuel pump cam on a crankshaft, absorbing engine acyclism shocks.

Segmented guide sleeve and U-shaped holder reduce friction, vibration, and assembly complexity in high-pressure fuel pumps.

An embedded metal sleeve with a press-fit collar and sealing ring simplifies assembly of pump connections while preventing twisting damage.

Replacing sintered steel with stacked wrought steel blanks eliminates cavitation wear and particle generation in diesel fuel injection equipment.

Angled tappet contact surface maintains orthogonal alignment with the plunger axis under cam load, preventing edge contact and reducing high point stresses.

A retainer projection with reduced surface hardness maintains consistent clearance between the plunger and tappet in high-pressure fuel pumps.

Conical pump rims and convex rollers create line contact, preventing corner stress and operational failures in high-pressure fuel systems.

Circular waviness on the spring washer compensates for manufacturing-induced axial play, reducing component wear and operational noise.

Redirecting pressure pulsations through a modified valve into an inlet port chamber minimizes mechanical stress and noise on the pressure damper.

Integrating support elements into a single stamped part reduces assembly complexity while maintaining mechanical stability in high-pressure fuel pumps.

A centering guide in the tappet body receptacle ensures accurate press fitting of the roller shoe.

A high-pressure pump integrates a band-shaped spring into a roller skate groove to provide piston preload.

A fuel gallery integrates a pulsation damper to stabilize fluid flow within high-pressure pump systems.

Segmented spring seat design reduces radial side loads on the plunger, preventing wear and seizure in high-pressure diesel fuel pumps.

An intermediary plate constrains the cam rider to prevent angular tilt, reducing plunger wear and avoiding guide device jamming in diesel pumps.

An eccentric circular cam drives a roller that reciprocates a piston, reducing bearing stress and wear during variable speed operation.

A fuel injection pump cam incorporates a deformed section to form an oil film, reducing shoe braking torque and preventing seizure.

An oval bore cam member reduces peak hoop stress during thermal shrink fitting of fuel pump driveshafts.

Angular offset pump heads reduce overall length, resolving the trade-off between compact width and excessive axial span in common rail systems.

Curved side surfaces allow a tappet arrangement to self-align with a camshaft, resolving durability and cost trade-offs in downsized engines.

Resilient stopper members prevent roller lift-off at top dead center, reducing cam track wear under high pressure.

A composite shoe with a resin damping layer absorbs vibrations in high pressure diesel fuel pumps, reducing distortion and material costs.

A combination outlet valve and pressure relief valve shares a common spring to bias both members within a single housing structure.

Merges valve guide with holder to reduce axial size while maintaining smooth fuel flow.

Offset plain bearing clearance reduces uneven pressure distribution and wear in high-pressure fuel pumps.

Flexible portions on the body-side holding member prevent contact with the metal damper, reducing manufacturing costs and excessive load.

A frustoconical return spring with varying external diameters alters the spring rate along its length to maintain contact force in diesel fuel pumps.

An intermediary wave spring adaptor resolves the conflict between small spigot diameters and driving gear pre-assembly by constraining axial movement.

Integrating an elastically deformable closure element bottom area into the pump housing reduces pressure pulsations without requiring separate membranes.