Gearing Control TRIZ Cases

A spring-pretensioned latch separates holding from readjustment, allowing reliable locking and temperature-driven release without coil energization.

Visual shift guidance recommends the correct pre-start gear in a bottom-neutral transmission, preventing unnecessary shifts that accelerate clutch wear.

Rotational position sensing times dog-clutch engagement to avoid tooth-on-tooth contact, reducing transmission wear and shift noise.

A timed override keeps the vehicle stop-hold function active when a cancel switch is held by external causes, preventing unintended creep.

The controller delays vehicle travel until the auxiliary power source can back up the main source, preventing steer-by-wire power loss.

Multiple eLSD torque requests are arbitrated to track yaw targets, limit wheel slip, and improve vehicle stability during critical events.

A learned environmental coefficient stabilizes electromagnetic valve control at engine startup while limiting valve and transmission operation.

Driving-force-based neutral switching time helps prevent erroneous shifts during travel while preserving fast response when cutoff is needed.

A non-linear feedforward model controls hydrostatic pump pressure and displacement for smoother torque-speed mode switching and lower latency.

Adaptive shift-point control uses battery and drive-state feedback to keep tractive force steady during powershift gear changes.

An axially shifted clutch sleeve decouples the ring gear or engages park lock, cutting transmission losses and drivetrain complexity.

Calculating slope indication from vehicle forces enables target shift point control on loaded grades without slope or gravity sensors.

Stored control tables let an HST wheel loader tune pump pressure limits for traction control without a complex hydraulic pilot circuit.

A parallel neutral valve speeds swash plate return to neutral, generating emergency braking force and shortening construction vehicle stopping distance.

By gating engine-speed upshift control with gear-specific target shaft speed, this case prevents unintended two-gear upshifts from shift delays.

A vehicle display shrinks its exposed area by gear state and autonomous mode to reduce gaze dispersion and support accurate input.

A neutral travel control valve before high-to-low shifting cuts transmission shock while preserving front work implement operability.

A parallel layout of hydrostatic and planetary speed changers cuts transmission length, suppresses corotation, and lowers component cost.

Relocating vehicle function buttons from the dash to the shift plate improves access on rough terrain without interfering with gear shifting.

Prime mover speed is raised for faster articulated arm return while hydrostat adjustment keeps vehicle speed unchanged during work cycles.

A spring-back gear scroll wheel on the steering column enables intuitive forward, neutral, and reverse selection without taking a hand off the wheel.

Conditional key-off park-lock control lets drivers keep neutral free for parking adjustment while still restricting unintended vehicle movement.

A motor-driven cam and elastic alignment structure replaces hydraulic clutch actuation while maintaining press force and rapid shifting.

Target engine speed is set before clutch reclosure in creep-mode shifts, cutting clutch wear while keeping gear changes quicker and smoother.

An embedded controller isolates gear selection from infotainment access, blocking unauthorized vehicle control while keeping the display accurate.

A clutch ring that directly engages the support ring and side gear cuts disconnector length and weight while reducing differential noise in 2WD.

A pawl spring uses stored stress for re-fitting, cutting continuous load on the parking rod and actuator when gear engagement is delayed.

A preloaded spring lets the pin overcome obstruction and reach its extended position without continuous coil energization.

Pre-opening the separating clutch and preselecting sub-transmissions cuts synchronization time during deceleration and starting gear shifts.

Multiple springs acting at different operator points balance pedal load, improving CVT neutral return smoothness and mechanism durability.

A single park control switch uses press duration, vehicle state, and slope holding logic to align parking brake action with driver intent.

Motor temperature sensing adjusts control gain to stabilize shift torque across temperature changes and prevent excessive shift member movement.

Staggered synchronous control lets two prime movers reach target speeds together, reducing dog clutch collision during fast gear shifts.

Uses brake, switching valve, and actuation valve control to warm the hydraulic travel circuit and measure relief pressure without special equipment.

Pre-slipping the CVT forward clutch before fuel re-injection cuts coasting jerks and NVH while preserving shift feel and response.

Internal hydraulic passages in a monolithic electric axle housing cut packaging bulk, simplify assembly, and speed clutch actuation.

Rotation-position sensing times claw engagement to avoid tooth clash, reducing transmission wear and rattling without pre-synchronization.

An excess HST gear ratio during low-high shifting preserves vehicle speed response and reduces shift shock under traveling load.

During hard deceleration, ABS-aware clutch inhibition prevents high slip-speed engagement and protects transmission clutch struts.

An elastic form-fitting blocker latches a drivetrain shaft at high speed while cutting actuator force, energy use, and installation space.

Shifting strategy adapts to sustained-action brake workload and start criteria to improve braking torque distribution and transmission response.

A pedal-opening threshold switches the start speed ratio to improve launch acceleration without driving up engine speed and fuel use.

Axial gear shifting and a coupling sleeve let this electric drive axle add multiple speed ratios and park lock without enlarging drivetrain packaging.

A case-mounted sensor and armature-carried magnet detect lock or unlock state without rotating sensor contact, reducing wear, cost, and durability risk.

Predicted current thresholds switch HST electromagnetic valves before swash plate delay causes unstable gear ratio control near neutral.

A mechanical interlock blocks simultaneous knob rotation and button pressing, preventing erroneous R/N/D and P shifts with one Hall-sensed assembly.

A rack-and-gear shift lever separates sliding support from wire actuation to cut size and weight while preserving rigidity and tunable shift force.

A rotational shutter function oscillates the drive gear during axial shifting to prevent blocked tooth contact without mechanical synchronizers.

An air-gapped haptic motor in a vehicle shift control reduces vibration and noise transfer while giving clear shift feedback to prevent mis-operation.

Motion-profile control guides transmission shifting elements to avoid tooth-to-tooth impacts, cutting noise and mechanical stress.

Ambient-aware power limiting helps a pedelec crank drive avoid sudden motor cutback while keeping housing temperature within safe limits.

Adaptive lead and delay compensation stabilizes CVT ratio control, improving damping and reducing longitudinal vibration across operating states.

A rotatable stop element lets the shift drum reference position while extending torsion angle range and preserving package-neutral transmission design.

Opposed-end motor placement shrinks gearbox actuator width while preserving stable, accurate gear engagement through dual transmission elements.

A spring-biased selector with a non-wearing damper cuts free play and noise, giving motor vehicle transmissions a more precise shift feel.

During forward coasting in neutral, the ECU enables one-step switching to B mode, reducing shift effort and avoiding unintended mode changes.

A stop device limits parking lock pawl deflection, blocking high-speed accidental engagement while preserving secure low-speed lock-in.

Road-gradient prediction selects a lower gear before an uphill section to avoid temporary stall and long speed recovery during downshift.

An elastic damping member on the selector contact point cuts gearshift impact noise while avoiding the friction and complexity of earlier shifter designs.

A movable finger and stepped track block accidental reverse engagement in a 5-speed gearbox while keeping the locking mechanism compact and reliable.

A movable retainer and actuator lock the shifter until brake-triggered release, preventing unintended shift-by-wire gear changes.

A dual-position paddle and detent mechanism enables single-step or processor-selected gear changes for easier fuel-saving or performance driving.

A shape-memory alloy shifter replaces hydraulic actuation in transmission friction plates, simplifying gear engagement and reducing debris sensitivity.

A pivotably mounted actuating shaft decouples the manual release lever from internal transmission switching operations.

Controller applies compensation torque to the engagement-side clutch during manual range power-on up shifts, achieving shorter and lighter shifting times.