Gearing Control TRIZ Cases

A rigidly integrated hydraulic unit and actuation cylinder saves drivetrain space while actuating the parking lock and supporting lubrication and temperature control.

Hall sensor feedback and fail-safe motor control keep a sphere shift mechanism at its rotation completion position, reducing clearance, noise, and part damage.

A parallel hydrostatic-mechanical layout uses planetary gears and integrated clutches to smooth range shifts while reducing power interruption and NVH.

A spring-buffered lever and latch mechanism absorbs ratcheting impact energy so the parking lock engages only when the wheel can lock cleanly.

Curved actuator contact surfaces absorb unwanted movement in a gearshift sensor, reducing wear while keeping position detection accurate and low cost.

Clutch and brake coordination blends hydraulic, gear, and rhombic pyramid paths to deliver stepless ratio changes with lower shift impact.

A laterally displaced lock member secures the shift body from a set position while reducing shift device height and structural complexity.

A reversible transmission uncouples the gearbox shaft so it can settle into stable gear positions despite tolerances, cogging torque, and power loss.

A spool valve links case drain, control, and return lines to prevent pressure spikes, piston shoe lift, and hydraulic motor damage.

Variable pressure regulation and torque control in an open-circuit hydrostatic drive raise braking power while limiting energy loss and engine overload.

A self-locking actuator and decoupling spring simplify EV park lock pawl control while improving locking-state monitoring and reliability.

A multidirectional Hall sensor and magnetic changing elements let one locking unit sensor track both piston and guide element positions accurately.

A preloaded spring and pivoting magnetic armature keep the parking lock ready for secure P-stage engagement even during power failure.

A spring-loaded connecting rod creates a pre-actuation gap that speeds heavy-duty clutch engagement while avoiding premature contact.

Condition-based checks across duplicated rotation detectors identify sensor faults quickly, helping work vehicle CVTs maintain stepless shift control.

Inductive eddy-current sensing tracks parking lock actuator position accurately, while a spring emergency mechanism works even during power failure.

A steering-column shifter combines rail translation, lever rotation, and locking to switch easily between automatic and sequential modes.

Backward torque-converter modeling targets driveline torque directly, improving acceleration consistency while mitigating vehicle NVH.

When second gear cannot engage, the transmission locks parking by engaging first and third gears together to prevent roll-away on slopes.

Accumulated usage and driving tendency data raise transmission line pressure to offset aging leakage and prevent clutch slippage.

Hydraulic pistons, springs, and pressure valves coordinate pump and motor displacement timing in a compact hydrostatic CVT without complex linkages.

PV-based engine torque control limits hub and lock-up piston wear during clutch engagement while preserving torque transfer and easing oil pump load.

Coordinated hydraulic motor torque and clutch torque control smooths compound transmission range shifts while reducing tractive force drops and friction losses.

When a vehicle fault occurs, the park lock engages only below a speed threshold to avoid mechanical stress, instability, and lock damage.

An anti-rotation holder keeps the piston magnet aligned with the sensor, enabling accurate non-contact gearbox actuator position sensing.

A 3D helix contact surface matches the shift drum groove to spread load, cut wear, and simplify groove follower manufacturing.

Secondary pump pressure is fed back to the transmission pressure valve to damp oscillations, stabilize clutch pressure, and improve ride comfort.

Axial armature rod motion draws gearbox fluid into the actuator during passive states, avoiding separate filling stations, dirt, and oil dispersal.

By converting upcoming corner curvature into equivalent mass, this control case predicts gear changes to avoid cornering power mismatch and fuel waste.

A lever-actuated retention tool pre-tensions and aligns a stiff pawl spring for parking pawl installation without over-stretching in tight housings.

Real-time terrain data is fused with economic and dynamic shift strategies to smooth gear changes and balance fuel economy with drivability.

A spring-preloaded actuator and emergency locking position let the parking lock engage safely during solenoid, motor, or power failure.

When a driver exits with a poly-shifter left in Non-Park, the controller checks parking pawl lock state and powers down to prevent battery drain.

Flexible locking fingers let a rotary shifter slip under excessive torque, preventing breakage and automatically re-engaging for normal gear changes.

An added bearing below the park lock gear distributes impact loads, protecting the rotor shaft bearing and reducing engagement losses.

Aligned permanent magnets and 3D Hall sensors detect external magnetic fields that could corrupt automated transmission gear position signals.

Automatic Turtle mode pulses at low speed improve braking, shorten precision work cycles, and protect the hydraulic motor.

A perpendicular latch lever and linear solenoid layout cuts gearbox parking lock space, friction, weight, and cost while keeping secure wheel locking.

Automatic Turtle/Rabbit switching adjusts hydraulic motor displacement by speed and accelerator input to reduce jerks and improve control.

A built-in tact switch adds audible click feedback and smoother load buildup, helping drivers confirm transmission range changes reliably.

A detent plate, bellcranks, and magnetic position sensing recreate manual shift feel in EVs while enabling precise motor control.

Direct translation and rotary selection let one gearbox actuator cut installation space, energy use, and wear during gear shifting.

Integrated sensing and motion conversion simplify transmission actuator assembly while preserving precise shifting in a compact module.

A fail-safe hydraulic valve layout keeps the lockup clutch released and forward drive available when a lockup control valve sticks on.

A metal pipe guide inside a plastic parking lock housing improves piston motion, sealing, and multi-position locking with lower weight.

A 3D helical contact surface matches the shift drum groove to spread load, cut wear, and enable softer, lower-cost follower materials.

A sleeve, piston, spring, and plug restore transmission hydraulic pressure in worn signal accumulator bores without valve body machining.

Selective release stages power only the safe transmission actuator, reducing false detections, energy use, and gearbox blocking risk.

Adjustable hydraulic motors maintain partial flow during wheel slip, improving traction and eliminating bulky flow dividers.

Hydraulic pistons, springs, and pressure valves replace complex linkages to coordinate pump and motor volume change timing in HST drives.