Gearing Control TRIZ Cases

An inclined shift lever for drive ranges and an upright park position reduce arm strain while improving shift position recognition.

Shaped projections stop inner control ring over-pivoting, keeping roller skew fixed across tilt changes in toric-drive CVTs.

An integrated cable pull uses the parking lock actuator drive for manual unlock, cutting parts, actuation force, and reset effort.

A circular-arc actuating contour preserves parking pawl self-locking under dynamic loads while reducing release force, mass, and package space.

Separate pump output lines and valve-controlled shutoff improve transmission pressure control while lowering hydraulic energy demand.

Cross-checking knob position from rotation and position sensors helps detect sensor faults accurately without redundant same-type sensors.

Road grade prediction guides early or inhibited gear shifts to hold cruise speed on hills while improving drivability and fuel economy.

Thermally isolated infrared and RTD sensors track CVT belt and air temperature, enabling load reduction before overheating causes failure.

Multiple engine- and motor-driven oil pumps switch between supply modes and no-load states to cut fuel waste while maintaining transmission flow.

A retrofit bushing repairs degraded shift cable end couplings, restoring secure shift lever engagement without replacing the full cable.

Motor current and position are integrated during park release to estimate load factor without extra sensors, improving shift consistency.

A coupling rod links a support-mounted mass to the manual gearbox shift lever to preserve inertia while cutting vibration, weight, and package space.

Sequential pressure ramping builds oncoming shift-element torque capacity during low-torque upshifts to shorten shifts and improve driveline sync.

Clutches and brakes combine gear, hydraulic, and metal belt paths to switch modes for stepless, high-precision speed control.

Temporary incoming-clutch overtorque sharpens downshift deceleration feel while engine-assisted synchronization helps avoid wheel blockage.

A clutch disconnect and reconnect sequence lets automatic transmissions mimic heel-and-toe downshifts with smoother gear changes and feedback.

Pressure and engine-speed feedback trigger automatic travel motor deceleration, balancing high travel speed with hydraulic load changes.

Turn-on current feedback detects when a gear shift abnormality is cleared, enabling fail-safe release and faster return to normal shifting.

A shift sequence activates neutral hold so a vehicle stays in neutral during door-open or seat-belt changes without unwanted park shifts.

A parameterized speed-to-torque map lets the gearbox control unit account for retrofitted auxiliary loads and adapt clutch pressure.

Stored shift-range data keeps the park lock in its prior state after CPU reset, avoiding unintended activation, noise, and towing hazards.

Adaptive sensor value tables let a vehicle gear selector keep accurate lever position detection even when one or more sensors fail.

A roller fixing portion adds sliding friction in the parking lock cam to stop lock member retraction and suppress pawl disengagement on slopes.

Self-locking pumps and a pressure accumulator keep CVT pulley pressure stable during motor-off periods, cutting reactivation energy.

Hydraulic pressure feedback detects clutch engagement start despite wear and part variation, improving automatic transmission shift timing.

Adaptive current-to-pressure modeling improves axial piston pump speed control under varying loads while reducing feedback hardware and oscillation risk.

Piston speed in a hydraulic positioning cylinder is used to infer pump delivery flow without a separate meter, improving transmission reliability.

A cam lock with permanent and electromagnets blocks high-speed downshifts and seals the actuator against moisture and noise.

Circumferential detent plate engagements enable direct P-to-D shifting, avoiding unintended intermediate ranges during motor failure.

A single magnetic sensor tracks both axial and rotational shifter motions, reducing friction, wear, and detection complexity.

A cam-and-spring park release enables one-handed shifting from Park while automatically re-engaging the lock to prevent rollaway.

Using existing pressure control and flow behavior, this case maps a transmission pump curve after replacement to cut hydraulic losses.

Clutch pressure is adjusted to keep drive torque constant during inching gear shifts, reducing torque shocks, driver stress, and accident risk.

Multi-stage downshift control keeps engine speed above lockup release during rapid deceleration, extending fuel cut and improving fuel economy.

A steel-ring friction pair replaces the chain-steel belt in a CVT to cut contact stress, raise torque, and extend service life.

Torque limiting during shaft speed matching cuts surges and wear, enabling smooth gearbox pinion synchronization under hard braking.

During deceleration, the controller raises the CVT primary pressure limit when wheel lock tendency is detected to prevent belt slip.

Rotating overlapping stator plates changes fluid opening area, enabling quick K-factor tuning without replacing torque converter stators.

An offset fork bracket and added interlock lug counter torque-driven sleeve shift, reducing synchronizer friction, wear, and gear release risk.

A three-position lock bar and cam mechanism restricts or permits D-S shift lever movement to prevent unnecessary pivoting.

Driver intention detection lets the gear select module give real-time haptic shift control before TCM confirmation, reducing delay and invalid shifts.

Weakened deformation zones and spacer bracing create a simple, play-free component lock without overstressing the mounted part.

Integrated cast flow paths and an external pump cut hydraulic flow restriction, contamination, part count, and response delay.

External insertion of the detent rod simplifies shift lever assembly, cuts parts, and maintains reliable detent release with lower button force.

Pressure-profile diagnostics detect hydraulic accumulator faults in automatic transmissions without adding complex sensor hardware.

Two independent hydraulic paths and clutch-brake switching expand speed regulation range while improving transmission efficiency and fault tolerance.

An active dynamic damper uses clutch and fluid-pressure control to cut resonance sideband peaks and improve transmission NV stability.

Variable pitch rack-and-gear geometry boosts shift torque at key positions while keeping the gearbox actuator smaller and lighter.

A guide aperture and fixing pin keep the shift lever bullet from detaching or rotating, improving transmission assembly and reducing noise.

Automatic torque reduction, crawl inhibition, and shift changes limit gearbox overheating during vehicle launch without oversized cooling.