Valve Drives TRIZ Cases
- Coaxial Cam Crankshaft Hydraulic Valve Actuation
A coaxial cam crankshaft hydraulic actuating system drives output pistons to open intake valves.
- Cam Phaser Helical Bias Spring Square End Retention
Linear spring regions anchor into phaser recesses, eliminating axial tangs to simplify powdered metal manufacturing.
- Cam Shaft Plunger Hole Design for Decompression
Radial plunger movement through a cam surface opening reduces starting load while maintaining lubricity.
- Variable Valve Cam Lobe Oscillation Control
A cam lobe member with a segmented push part oscillates smoothly between positions using an elastic bias.
- Sliding Valve Assembly with Cam Actuation and Pressure-Sealed Rings
Cam actuation drives a sliding valve body while system pressure loads primary and secondary seal rings against sealing surfaces.
- Engine Cam Switching Actuator Current Control
A control device manages electromagnetic solenoid actuator energization to seat engagement pins on cam grooves.
- Hydraulic Valve Drive with Spring Energy Recovery
A hydraulic drive system uses a spring accumulator to store and release energy for valve actuation.
- Compensating Axle Distance in Valve Timing Gears
A modified intermediate gear compensates for crankshaft to camshaft center distance changes, restoring precise tooth meshing and preventing timing drive wear.
- Rolling Bearing Camshaft Adjuster Friction Reduction
A hydraulic camshaft adjuster replaces sliding contact with a rolling ball bearing to minimize mechanical friction losses.
- Camshaft Adjuster Screw Boss Radial Mounting
A camshaft adjuster screw boss supports a spring and secures the side cover rotationally through integrated radial mounting features.
- Compression Release Engine Brake Socket Module Design
An integrated socket module eliminates external reset brackets, reducing system volume while maintaining constant valve lift and preventing uneven wear.
- Hydraulic Motor Distribution Slide Valve Maintenance
A hydraulic motor distribution slide valve slides sealingly against a flat plate to control fluid flow between chambers.
- Cam Phaser Air Dynamic Detection for Engine Control
A cam position sensing device and control module differentiate transient from steady state conditions using dual filters to calculate estimated air values.
- Hydraulic Valve Control Arrangement for Zero Clearance
A hydraulic control arrangement pressurizes a piston unit to eliminate mechanical lash in engine valve timing systems.
- Valve Timing Rotor Sleeve Press-Fit Design
A press-fitted rotor sleeve joins the vane rotor to the fastening bolt without gaps.
- Continuous Variable Valve Duration Cam Mechanism
A continuous variable valve duration apparatus adjusts opening time via a rotating cam device and control shaft.
- Z-Twin Engine Central Shared Camshaft Vibration Cancellation
A Z-twin engine uses a central shared camshaft to drive angled side valves across horizontally opposed cylinders.