Gearing Control TRIZ Cases

Fluid-pressure piston actuation replaces cable-based park linkage to smooth engagement transitions and improve transmission park reliability.

A three-passage lockup clutch separates apply and release oil flow to prevent converter ballooning, reduce clutch heat, and speed engagement.

An integral shoulder with radial ribs and ridges forms a stable differential speed target, avoiding welds, deformation, and detachment.

A dual-helix driven clutch switches ramp engagement by torque direction to improve CVT torque transfer in acceleration and engine braking.

When second gear cannot engage for parking lock, the transmission secures the vehicle by simultaneously engaging first and an alternative gear.

A motor-driven clutch mechanism replaces oil hydraulics to enable rapid gear shifting and maintain press force as the clutch wears.

During wheel slip, shift parameters are biased toward tie-up with higher stroke pressure and delayed clutch release to prevent flare.

A reversible securing element holds the shifting element and spring in place for faster coupler assembly with fewer handling errors.

A sleeved drop-in piston restores transmission signal pressure in worn valve body bores without modifying the original hydraulic circuit.

Detected motor speed and hydraulic pressure trigger smooth straight-travel deceleration, reducing unintended speed changes in working machines.

Rule-based evaluation of duplicated rotation detectors enables prompt fault detection and fail-safe stepless shift control in work vehicle CVTs.

Parallel-axis fixing surfaces simplify assembly of a compact vehicle transmission locking mechanism while preserving positioning strength.

An inductive coil and cam-linked indicator detect parking lock actuator position accurately, even during power loss or mechanical faults.

An electric actuator and linkage brake the transmission output shaft without hydraulics, improving park engagement reliability during failure.

A V-shaped flexible blade positions the actuating lever to keep shaft locking compact, strong, and easier to assemble in tight transmissions.

Predictive engine torque compensation uses transmission speed and driver demand signals to smooth upshifts and reduce clonk, shunt, and shuffle.

Parking lock pre-engagement immobilizes the transmission output shaft, enabling reliable downstream range shifts despite drag losses.

A rotatable piston magnet and guide align with the position sensor, cutting magnet size, assembly effort, and actuator cost.

A series motor-reducer-movement layout shrinks the parking lock actuator, cuts power use, and enables low-force emergency unlocking.

Three-axis acceleration and speed sensing detect vehicle jumps, block risky shifts, and protect off-road transmission gear engagement.

When a park pawl fault or CAN malfunction occurs, the controller engages the ePB automatically to prevent rollaway and battery drain.

Using one active valve and staged hydraulic pressure, this case simplifies parking lock actuation and cuts valve and pump complexity.

Variable intake and discharge restriction across hydraulic motor groups enables traction control and engine braking with fewer components and lower energy loss.

A rounded convex disengagement face creates point contact on the gear lever, enabling reliable manual park release with simpler geometry.

Pressure modulation in an automated manual transmission frees tooth-on-tooth shifting elements, restoring gear engagement and preventing jamming.

Cross-checking shift fork position with shaft-speed transmission ratios improves gear detection reliability and triggers error handling on mismatch.

An inductive sensor tracks park lock gear angle and speed so the pawl engages at the right position, preventing vehicle creep and extra sensors.

A rotatable blocking member and elastic reset structure prevent wrong gear shifts while reducing spring fatigue and interference in shift mechanisms.

Precharging the hydraulic clutch before the switching point shortens gear change time and reduces shift shock in work vehicle transmissions.

A sprag stopper and cammed parking rod prevent racheting damage on gradient release, preserving normal parking function.

Pre-charging the hydraulic clutch before the shift point cuts gear change delay and reduces shift shock in planetary work vehicle transmissions.

A modular park lock uses automatic power-loss engagement and a separate manual release to enable towing without sacrificing vehicle restraint.

Fluid pressure alone holds the shift rod in neutral, removing mechanical detents to cut transmission cost and avoid actuator overheating.

A preloaded spring held by a pivoting magnetic armature keeps the transmission in P during power failure without a separate backup power source.

Actuator current is used to identify tooth-on-tooth and end positions in transmission shift elements without a position sensor.

Formed-in hooks and thicker plate sections help a transmission accumulator plate resist piston and spring pressure without bending or breaking.

A meandering-groove actuator enables fast parking lock engagement and release with one-way rotation, cutting parts and actuator cost.

Internal pump state switching replaces changeover valves to reduce throttling loss, noise, and vibration in hydrostatic cylinder drives.

An oscillating actuator signal helps a gearbox switching element break free from sticking, cutting shift time and mechanical stress.

A priority valve splits one hydraulic circuit into high- and low-pressure zones, securing clutch actuation while reducing transmission complexity and energy use.

A replaceable bushing restores a worn shift cable end to the shift lever, avoiding full cable replacement and cutting repair time and cost.

Driving-force-based neutral shift timing prevents erroneous switching during travel while improving response when drive wheel force is high.

An overmolded coil extension cushions and guides the annular piston, cutting transmission actuator noise, shocks, and wear.

A temporary locking arm fixes the gearbox control lever at a selected gear to prevent misalignment and simplify shift linkage assembly.

Acceleration- and speed-based control inhibits shifting during jumps, then returns to automatic mode at engine speed limits.

An integrated interlock and self-return mechanism simplifies rotary shift control, cutting part overlap, space use, and misoperation risk.

Friction thrust pieces adapt speed before sleeve engagement, cutting claw-type gearshift noise and wear without a synchronizer ring.

A pretensioned spring helps a rotary actuator overcome dog clutch blockage during gear tooth misalignment, enabling faster shifts with less wear.

Built-in rod geometry secures the shifting element axially without extra parts, simplifying transmission assembly and maintenance.

Motor and Hall-sensor feedback keeps the sphere shifter at its rotation completion point, preventing clearance, noise, and part damage.