Gearing Control TRIZ Cases

A wheel-house manual override stays hidden behind the straight front wheel to prevent accidental parking brake operation yet remains reachable in emergencies.

Reverse-logic proportional valves and protection valves keep cable tension controlled during emergency stops, preventing overload and recoil.

Hydraulic pistons and a support rod shift an EV gearbox while motor speed matching replaces synchronization rings to prevent gear damage.

Automatic brake pressure buildup during shift out of park prevents incline roll and reduces parking brake wear after key-on.

Prime mover output is adjusted to separate the dog, then synchronize speeds before gear entry to reduce shift shock and stress.

Shift intervention uses vehicle speed, motor speed, lever position, and fault status to keep the rear drive motor in its optimal range.

Temporarily pausing actuator abnormality detection during power-source switching lets a vehicle complete the shift to parking.

Hydraulic pressure feedback shifts planetary clutch timing in a work vehicle CVT to reduce switching shock under changing HST efficiency.

By checking motor current against line pressure, this control avoids false electric oil pump failure calls and unnecessary fuel use.

A two-stage hydraulic plunger and transverse slide keep the park lock fail-safe in power loss and latched open for transport.

A learned environmental coefficient stabilizes hydrostatic CVT valve control after engine startup by limiting valve and gear actions during calibration.

Stepped torque output simulates gear shifts in EV acceleration to restore acoustic cues, improve driver alertness, and reduce fatigue.

A pre-start drain path unloads the hydraulic pump in cold, high-viscosity conditions, helping the engine start before pressure is restored.

A two-stage CVT ratio strategy delivers immediate acceleration, then raises engine load smoothly to sustain response and improve fuel efficiency.

Real-time hydraulic pressure and vehicle speed feedback adjust planetary clutch shift timing to reduce switching shock and clutch repetition.

Bus-linked motor actuators let one unit take over another in automatic transmissions, improving shift reliability and easing maintenance.

Dynamic driveline control enables 2WD-4WD switching while moving, improving low-speed traction and fuel use across changing road conditions.

An elastic member adds rotational resistance to the shift lever, preventing position override during vigorous operation and improving gear accuracy.

Charge pressure differences reveal hydrostatic transmission leakage and state of health without opening the closed hydraulic circuit.

A variable-displacement hydraulic pump and piloted proportional valve hold cable tension and stop unwinding during overload.

Pressure and speed feedback adjust hydraulic motor displacement to prevent downhill overspeed and maintain torque under high load.

A pressure control valve opens during lock-up clutch engagement to lower torque converter pressure and cut hydraulic pump horsepower loss.

Restricting the upper shift gear during ACC curve entry prevents rapid two-speed shifts and reduces torque changes for smoother driving.

Swashplate angle feedback and pre-engaged clutch control stabilize hydrostatic CVT behavior under load changes and braking.

An autonomous power circuit with a bistable switch and monostable opener keeps the parking lock releasable during transport when vehicle power is off.

Manual mode duration is extended when driver inputs indicate continued shifting, preventing premature return to automatic mode.

When a speed limiter is active, kickdown control suppresses unnecessary power requests near the limit to cut noise, fuel waste, and emissions.

Repeated garage shifts can overheat transmission clutches; this case detects rock cycling and switches calibrations to protect durability and shift quality.

An integrated central piece, piston, and locking structure improves parking lock stability, cuts mass, and simplifies production.

Onboard simulation compares gear shift actions against a speed profile to cut fuel use, reduce wear, and keep vehicle speed within limits.

Using predicted uphill and downhill gradients, the control switches dual final drive ratios to balance vehicle power and energy economy.

Vehicle speed checks trigger driver warnings during park lock actuation, helping reduce gearbox wear from abusive engagement.

A laterally movable shifter uses slotted and detent plates to switch from lockout-protected automatic mode to free manual gear changes.

A unified TCU handles button, dial, and lever shift inputs with one signal per gear stage to cut cost and prevent accidental shifts.

Offsets the locator installation point to the vehicle center of gravity, improving gearshift timing accuracy in long vehicles.

A stamped bracket integrates shift shaft support and cable mounting to cut parts, lower cost, and keep a compact steering column profile.

A gearshift trapping valve keeps hydraulic pressure and the selected rotor gear ratio during faults, preventing disengagement and gear damage.

Surface grade sensing boosts clutch pressure and torque limits only when needed, improving transmission durability and fuel economy.

Real-time gear intervention uses vehicle speed, motor speed, lever position, and fault status to keep the rear axle drive motor in its optimal range.

When a speed limiter is active, kickdown response is altered above a threshold to avoid wasted power, noise, and fuel loss.

Simulated speed profiles trigger clutch, brake, and start-gear actions before uphill downshifts cause engine stall or vehicle rollback.

A synchromesh-induced speed difference helps avoid cog-to-cog gear engagement, shortening shift time and reducing clutch wear.

After tollgate passage, shift control switches from driver input to automatic mode using speed and accelerator conditions to preserve intended acceleration.

A controller checks engagement center position and isolates actuator drive to prevent shift failure from mounting errors or position drift.

An initial CVT ratio gives instant acceleration, then a load-based ratio sustains response while improving fuel efficiency and smoothness.

Variable gain based on oil temperature stabilizes CVT closed-loop position control at low-temperature startup and shortens warm-up time.

Grade-based auxiliary pump control supplies needed transmission flow during engine stop-start events while reducing battery draw and pump stress.

Releasing at least one clutch in neutral cuts hydraulic transmission losses while preserving smooth low- and high-speed wheel loader operation.

During automatic parking, shift requests are filtered and forward motion is forced to the first forward position to avoid incongruous vehicle behavior.

Magnetic repulsion and gravity help this torque converter lower rotating load and reduce external power demand in motors, generators, and pumps.

An integrated shift lever uses a rotating movable knob to switch modes, reducing component count and improving aesthetic configuration.

A shift position controller adjusts the N position check time based on vehicle speed and current gear to optimize switching performance.

Shift actuator reduces engine torque while clutch remains engaged, minimizing shift time and transmission load.