Valve Drives TRIZ Cases

Exterior-driven axial cam reduces radial bearing alignment complexity and Hertzian loads while maintaining compact valve actuation.

A cam element counter-ramp surface interacts with a push rod ramp face to enable precise valve lift adjustments.

Inclined high-pressure fuel pump mounts on cylinder head cover to shorten pipe length and reduce heat exposure from the cylinder block.

Dual-drive system creates modified elliptical path that reduces piston ring wear while maintaining port aperture area.

An undercut between overlapping partial cams simplifies manufacturing complexity while maintaining valve lift switching capability.

A three-rotor eccentric oscillating gear uses a high-friction resin fitting portion to engage the second rotor and vary rotational phase.

A valve train device uses a nested lost motion unit to interrupt power transmission from the camshaft.

Axial oil path evacuates wet space through output element into camshaft bore, preventing splashing losses and air entry that reduce component service life.

Deformable rings between pin ends and tappet body tilt to reduce edge stresses on the roller caused by angular misalignment.

A cylindrical valve design uses a cam-driven cylinder to open and close ports within a sleeve.

A power plant uses high pressure gas to push a piston and rotate a crank member for direct mechanical drive.

A tappet assembly uses an anti-rotation clip to secure the intermediate element within the bearing structure.

Adjacent spiral grooves merge into a single pathway, reducing axial installation space and assembly complexity in internal combustion engines.

A fluid-pressure-operated valve timing controller uses a low-rigidity connector part to absorb axial tension.