Valve Arrangements TRIZ Cases

A variable valve timing spool moves with reduced sliding resistance using a movable member and resilient members, minimizing hysteresis and stick-slip.

An intermediate power transfer mechanism drives the fuel pump upstream of hydraulic actuators to preserve shifting velocity.

Holding waste gate and throttle open traps fresh air in the cylinder, flushing exhaust gases to enable faster expansion stroke combustion start.

Optimized radial opening geometries in a variable valve timing camshaft ensure reliable oil transfer while preserving mechanical strength against stress.

Side slots define lateral and rotational movement limits for the elastic member, accommodating hydraulic lash adjusters without redesigning the valve housing.

A valve clearance adjustment system uses a shim and locking mechanism to establish precise gaps between stems and screws.

A lead-angle setting method calculates average current values to determine optimal motor drive timing.

Multi-step intake valve lift mechanism switches between distinct opening profiles to optimize engine performance across hybrid operating modes.

Segmented valvetrain applies multiple variable valve actuation techniques to one cylinder without increasing structural complexity.

A hydraulic detent circuit actuates a lock pin to constrain the phaser rotor at intermediate positions.

Segmented rotor vanes and lobe surfaces form fluid gaps that resolve timing precision versus structural complexity in internal combustion engines.

An annular lift stop member adjusts lash offset via shim stock segmentation, resolving mechanical lift loss without complex machining.

Piezoelectric stacks drive bridges to rotate a nut on a screw, generating precise mechanical displacement through sliding contact friction.

Cutting the carrier tube enables insertion into unsplit bearing bridges, eliminating interchange risks and simplifying machining processes.

A camshaft sensor calculates actual ratios of detected edge times to determine engine synchronization without crankshaft data.

Symmetrical counter-rotating shafts drive identical transmission components, reducing mechanical complexity and manufacturing costs.

Spring biasing ensures default latched state in dual body rocker arm, eliminating precise timing requirements for reliable valve train switching.

Integrated bearing cap oil passages enable variable valve timing compatibility while avoiding complex die-casting machining challenges.

An anti-rotation pin locks circular and dynamic splines in the harmonic drive unit, preventing damage from friction torque during bolt attachment.

A breather chamber design utilizes cam chain rotation space to increase internal volume while maintaining a compact engine footprint.

A cold start lubricant distribution system uses a flow divider and modification assembly to apportion fluid flow between actively-lubricated work vehicle assemblies.

A variable cam timing phaser uses a remote solenoid actuator to switch a piloted valve for hydraulic fluid flow.

Thermal monitoring detects control valve leakage by measuring temperature differences, avoiding complex mechanical systems that increase cost and downtime.

Outer shaft oil channeling grooves pump lubricating fluid into the slide bearing gap, resolving wear from deficient supply under extreme conditions.

Segmented housing and nested membrane structures eliminate alignment challenges during manufacturing.

A cylinder head cover accommodates a reed valve above the exhaust camshaft to prevent exhaust gas backflow.

A variable valve timing control apparatus uses a seal mechanism to admit atmospheric air into oil passages when internal pressure drops below ambient levels.

Segmented plunger geometry absorbs exhaust valve travel during braking, preventing the valve from remaining open and causing engine damage.

A variable valve mechanism control unit adjusts opening periods based on intake air and rotation speed to optimize valve timing.

Variable valve timing traps residual exhaust gases to increase charge temperature and volumetric efficiency in internal combustion engines.

An oil supply device uses an electric pump to replenish reservoir levels during engine off periods.

A four-bar link actuator adjusts rocker arm angles to control intake air volume.

A variable displacement engine uses modified eight-stroke and four-stroke combustion cycles to maintain uniform torque output.

Auxiliary oil passage fills valve lifter gap with lubricant, eliminating striking noise during engine start.

Hydraulic actuation separates lock pins in a CVVT system, preventing engine stoppages at retarded positions while improving fuel efficiency.

Offset hydraulic lash adjuster rotates stub shaft to eliminate valve lash while eccentric bearings maintain stability under side loads.

A cam carrier insert supports a camshaft and variable displacement mechanism within an engine cylinder head.

A variable valve timing system positions the exhaust side accommodating wall inward to secure tool lines.

Hydraulic pressure switches the low lift body to the high lift body, adjusting valve open time and amount across driving speeds.

Monolithic cartridge design merges valve banks and integral fluid pathways to minimize dead-volumes and assembly complexity in compact diagnostic systems.

Segmented cam elements shift axially to select tracks, resolving the trade-off between high variability and device complexity.

Hydrodynamic focusing concentrates particles for accurate sorting, reducing cell damage while maintaining high throughput.

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

Axially acting actuators displace the cam carrier along the shaft axis, eliminating radial space constraints while maintaining precise valve timing control.

Integrating the wire harness and transfer tube reduces assembly time and simplifies verification through resistance value measurement from fuel level sensors.

Arranging roller elements in transverse planes minimizes installation space while maintaining rigidity through non-overlapping peripheral surfaces.

Segmented rocker arms with offset axes balance asymmetric loading to improve fuel economy while reducing mechanism complexity in internal combustion engines.

A valve actuation assembly adjusts intake valve opening duration to regulate vacuum levels in the engine manifold.

A water injection controller predicts cooling water usage to optimize pump system running conditions.

Propelling filler material directly into internal leaks seals turbomachine passages without requiring direct access or clean surfaces.