Valve Drives TRIZ Cases

A cam follower assembly uses a spring seat and tower to enable sliding motion relative to the cam lobe.

A controller detects carriage position using a magnetic marker and Hall effect sensor for precise valve lift control.

Encapsulating the solenoid device within a unified plastic element eliminates separate metal sleeves, reducing production costs and installation complexity.

A valve train assembly uses an axial shifting cam and a lost motion device to perform discrete valve lift events.

Segmented cam protrusions enable stable mode switching for exhaust thermal management without complex additional mechanisms.

Variable-length pigtail harness segments absorb vibration stress near the power-feeding brush, preventing disconnection during assembly.

A split rocker shaft supplies independent pressurized oil to high and low lift rocker arms.

A continuous variable valve duration apparatus adjusts opening duration using rotatable cam portions and sliding housings.

Inclined cam surfaces and asymmetric rocker arm support pins resolve interference between intake and exhaust valves while securing increased rocker arm length.

Curved contact contours in the valve drive mechanism eliminate edge carrier issues and reduce Hertzian pressure through axial self-guidance.

Biasing assemblies apply force to rocker arms following engine brake lift cams, reducing noise and wear from free tilting movement.

Unequal surface area configuration on the actuator valve piston eliminates central position stalling to ensure continuous pump operation.

Segmented rotatable body isolates axial force deformation to prevent friction deterioration in valve timing adjustment devices.

A multi-cylinder engine valve system uses common and individual operation members to move cam element sections axially for efficient switching.

Tool accommodation surfaces on camshaft functional elements distribute tightening torques during assembly.

A linkage control device integrates a rotating cam with bosses to drive multiple valve components in a blood gas analyzer.

Centrifugal separation in a radial dead space deposits lubricant impurities, preventing blockages and wear on vane-chamber interfaces.

Segmented lock pins allow the camshaft phaser to default to a mid-position during low oil pressure start-up, reducing noise and vibration.

Cam-controlled gear mechanism simplifies rocker arm latching by eliminating complex timing coordination.

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

Alternating cam segments distribute mechanical loads across dual followers, reducing shifting travel and wear during axial adjustment.

Complementary joining profiles with specific notches and elevations prevent oil leaks and rotor rebound in hydraulic camshaft adjusters.

Computational design adjusts rocker arm pad and camshaft lobe contours to reduce valve tip wear and tick while managing manufacturing complexity.

Adjusting device moves decompression valve actuating point based on crankshaft speed to optimize braking torque.

A collapsible pushrod system adjusts valve lift to vary engine compression ratios.

Segmented camshafts resolve the contradiction between valve size and valvetrain complexity, enabling larger valves and improved combustion efficiency.

A mechanical coupling apparatus with a blocking element controls valve lift via cam rotation.

A hydro-mechanical valve actuation module uses cam-follower pistons to drive engine valves via hydraulic pressure.

Thick-walled overhangs provide inertia mass to stabilize rotation while thin-wall portions minimize overall weight.

Offsetting the pivot ball creates clearance for fuel injectors in heavy duty engines, resolving noise and vibration issues while maintaining lash adjustment.

A gas valve actuation device uses a fluid circuit to control lift events, ensuring uniform engine braking despite thermal elongation and wear.

Contoured key pin surface contacts engine housing slot to limit rotational misalignment, reducing wear and extending service life.

Asymmetric end-face cam phases prevent camshaft locking during operational malfunctions, ensuring continuous engine rotation.

Opposing rocker arm inclinations cancel sliding forces from manufacturing tolerances, suppressing unexpected cam unit displacement.

A rotatable shaft with selector cams actuates rocker arm latches via a biasing return apparatus, eliminating complex synchronization requirements.

Adaptive learning maps spool valve transitional regions to prevent hydraulic circuit competition and ensure accurate cam phaser positioning.

Hexagonal axial extension enlarges cam contact surface to transmit 230 Nm torque, eliminating slipping and removing need for separate holding tools.

Integrating actuation contours with Hall effect sensors eliminates separate encoder components, resolving space constraints in motorcycle engines.

A camshaft adjuster superposition drive integrates a hollow electrical control unit to transmit motion through the accessory drive shaft.

A valve actuation system employs a rotational coupling with a transmission ratio greater than 1 to reduce mechanical forces and improve robustness.

A split brake lever with a locking element connects to exhaust cams, reducing mechanical loading and wear while enabling dual-phase braking.

Anchoring structures prevent disk element rotation during central screw tightening, maintaining precise circumferential alignment.

A sliding cam system actuates an exhaust valve to reduce engine vibrations during shutdown.

Two cams drive an eccentric sleeve that shifts a rocker axis, eliminating bulky triple-cam designs.

An eccentric shaft rotates within a slider housing to shift the cam phase angle, enabling adaptive valve duration while reducing engine complexity.

A variable valve drive uses a switchable rocker lever arrangement to adjust valve timing and lift characteristics.