Valve Arrangements TRIZ Cases

Apparatus resets engine brakes by discharging oil pressure through a check plate and piston mechanism.

A switching tappet and roller finger follower mechanism selectively locks components to actuate exhaust valves during compression strokes.

A hybrid drive control device decreases engine rotation speed using negative torque from an electric motor before clutch disengagement.

An integrated cover groove anchors the spiral spring outer end, eliminating separate pins and preventing axial stripping during pre-tensioning.

An electric motor drives a harmonic gear unit in this camshaft phaser, resolving slow low-speed operation and reducing oil pump capacity requirements.

Segmented accumulators and radial bearing recycling compensate vacuum peaks, reducing air entry during suction to improve operational reliability.

Optimized clamping point angles reduce contact forces in the segment-like winding package area, resolving high wear issues while preserving restoring torque.

Retards second exhaust valve opening timing as load increases, preventing pumping loss from excessive valve lift reduction.

A lift regulator cam contour deflects valve motion to adjust acceleration and lift profiles across operating modes.

Classifies fuel injector components by flow area to assemble matched sets, resolving manufacturing cost and precision trade-offs.

Cavities in plain bearings act as reservoirs that diffuse lubricant during transient periods without continuous oil supply.

Oil control valve mounts on cylinder outer surface to route hydraulic pressure through cam chain chamber walls.

A continuous variable valve duration apparatus adjusts opening time via a control shaft and slider housing mechanism.

Expandable plugs seal adapter and inlet pipes to isolate water valves, eliminating the need to shut down the entire building water system.

Dynamic valve timing in a split cycle engine recovers energy during braking by compressing working fluid without combustion, reducing component wear.

Acoustic sensors monitor condensate return lines to detect steam loss, replacing infrequent manual surveys with continuous monitoring.

Flat diagnostic pads on irregular control valve bodies allow precise ultrasonic testing to track wall loss from high velocity wear and corrosion.

Glass fiber reinforced plastic guide body reduces metal-to-metal contact and vibration in fuel pump cam followers.

Pressure-isolating seals in the connecting rod recess eliminate retraction forces on the piston, extending sealing fatigue life and improving system efficiency.

Switching valve positions lock the camshaft adjuster to prevent uncontrolled movements and wear during engine startup.

Hydraulically actuated coupling pivots switchable rocker arm to eliminate camshaft abutment friction and reduce packaging space.

Automated microfluidic valves isolate cells with high precision, eliminating manual pipetting errors and sample contamination risks.

A camshaft adjuster incorporates a hydraulic accumulator to buffer pressure fluctuations, preventing underpressure and reducing oil pump weight.

Holding exhaust valves closed while advancing intake valve timing eliminates oxygen pumping to the aftertreatment system, preserving catalyst efficiency.

Nested inner and outer cams share a center shaft to control valve lift and duration while reducing device volume.

A microfluidic passive valve uses a flexible layer that bends under fluid pressure to open or close an aperture, eliminating external actuation needs.

A gravity-fed emergency lubrication device uses tank elevation to drive oil flow through distribution pipes without mechanical pumps.

Startup process module determines relative camshaft positions to diagnose mis-builds, preventing false detections caused by early phasing during engine startup.

A diversion chamber isolates sewer sections using a dam and pumps to transfer fluid, preventing worker exposure to hazardous reflow.

Segmenting the U-shaped clip into nested arms accommodates anti-pop-off features while preventing axial disassembly of the valvetrain components.

Mechanically controlled actuator opens single exhaust valve during braking events to reduce valvetrain load.

A compensating coupling transmits torque via parallel surfaces on an annular body.

A flexible plate member couples an electric camshaft actuator to a phaser gear while accommodating axial and perpendicular misalignment.

Slotted plugs in oil chambers vent air from latch pin circuits, reducing transition time and complexity during cylinder deactivation.

Segmenting valve control into independent duration and timing mechanisms resolves the trade-off between optimization flexibility and system complexity.

A fuel injection pump thrust washer restricts tappet rotation using a protruding part contacting the tappet surface.

Flexible sensor covers seal biological sample fields pneumatically, resolving structural stability versus sealing reliability contradictions.

Interconnected engine cylinders recirculate exhaust gas internally, eliminating external EGR components and reducing NOx emissions.

Coupling adapter accommodates angular misalignment between electric motor and gear drive unit, reducing axial length of camshaft phaser assembly.

A liquid supplying device measures flow rates and monitors differential pressures across a control valve to ensure accurate chemical delivery.

Resin-molded solenoid housing uses radial through-holes to enable thermal communication with hydraulic oil coolant.

Deactivating engine cylinders reduces fresh air flow through the exhaust system, maintaining catalyst temperature while providing engine braking torque.

A switchable valve train rocker shaft uses a seepage orifice to connect internal chambers for continuous hydraulic fluid flow.

Hydraulic actuation replaces mechanical locking to eliminate partial engagement stress and enable multi-mode valve control.

Controller switches between early and late Miller Cycle timings to resolve startup reliability issues caused by reduced cylinder charge.

Single rolling bearing handles axial and radial forces, eliminating separate support mechanisms and reducing installation space in camshaft adjusters.

Segmenting the rocker arm into a separate trunnion body isolates the pivot bearing, reducing friction and wear while maintaining manufacturing simplicity.

A chemically removable photosensitive layer acts as a disposable scaffold for polymer deposition, eliminating costly deep reactive ion etching steps.

Hydraulic actuation changes the lash distance between a cam and follower, eliminating mechanical stops that cause wear during mode switching.

Actuator deflection creates passive valve functions without mechanical parts, eliminating inertia noise while maintaining precise fluid delivery accuracy.