Gearing Control TRIZ Cases

Direct solenoid control bypasses failed transmission electronics, enabling manual gear selection for vehicle recovery without towing.

Electrical fault detection lets a hydrostatic drive hold zero torque with non-faulty adjustment units, preventing cavitation and damage.

Sensor-based shift travel measurement checks and adjusts gearshift lever position to match driver foot geometry for more reliable shifting.

A deployable rotating handle drives an actuator to shift a transmission out of park during power loss, avoiding tools for towing.

Vehicle and hydraulic status signals refine DCT centrifugal compensation timing to cut startup noise, reduce shift impact, and extend transmission life.

Real-time CVT gear ratio changes generate inertia torque to restrain drivetrain rotational oscillation and improve vehicle drivability.

Motor current and angular position feedback slow and stop the transmission actuator precisely, avoiding parking lock overshoot from tolerance and inertia.

Angular sensing plus limited motor current pinpoints parking lock control plate position despite actuator tolerances and rolling-element inertia.

A button-and-knob shifter near the steering wheel uses mechanical contact on a substrate to avoid magnetic interference and simplify gear input.

A single drive unit coordinates axle differential blocking and parking lock engagement to save space, cut cost, and prevent vehicle roll-away.

A speed sensor moves with the connection member to track an axially shifting engagement member without enlarging transmission length.

A single cable links shift and mode levers to lock the rear differential in park, improving traction recovery without added mechanism complexity.

Actuator-position feedback detects tooth-on-tooth gear conflicts and triggers input-shaft speed pulses for smooth shifts without returning to neutral.

Actuator position sensing detects tooth-on-tooth gear blockage and triggers speed pulses for automatic re-engagement without manual shifting.

A two-frame cable mechanism uses a bullet lock to hold manual parking release under high vehicle load without repeated operation or gear damage.

A kinematic working-zone control scheme keeps motor displacement in bounds to prevent overspeed, avoid cavitation, and smooth shifts.

A laterally deflectable form-locking element compensates misalignment and shifts torque peaks to a stop, reducing park lock shock loads and wear.

A mesh sealing grid shifts airflow tuning and filtration out of custom solenoid valves, cutting transmission control unit cost and complexity.

A two-element parking lock with a spring-coupled pawl enables emergency release without shifting the control actuator or risking damage.

A vehicle gearset uses one sliding sleeve for gearshift teeth and sliding gear functions, improving centering, shift security, and package space.

Digital sensor ID matching lets the control unit block incompatible replacement sensors and maintain safe drive train operation.

A threaded carriage and actuator arm give shift-by-wire gear selection compact torque multiplication, precise magnetic positioning, and contamination protection.

A circumferentially extended magnet lets a gear shift actuator handle shaft rotation tolerances while preserving accurate position sensing.

An electronic controller selects the higher work or travel pressure target so one hydraulic machine can run both circuits without accumulators.

An uneven tooth-gap layout in a parking lock gear limits pawl penetration at speed, reducing ratcheting damage, noise, and vibration.

Oscillating the shift target helps free stuck transmission elements, cutting shift delay and mechanical stress in commercial vehicles.

A torque-sensitive coupling with torsion damping applies axial load and resistance in a CVT to limit backlash, torque spikes, and wear.

When P and N buttons overlap, the control logic holds the parking position to prevent unintended shift selection and improve safety.

A staged start-up keeps the electric motor above minimum speed, preventing overheating while the hydraulic pump and motor deliver torque efficiently.

Guide wall portions formed in the pushrod constrain pin motion, simplifying gearbox actuator assembly and preventing unintended gear engagement.

A dual-channel shifter uses interlock confirmation and diagnostic counting to catch inconsistent gear signals and improve shift reliability.

Electronic control calculates pump displacement from actual speed and target flow to keep hydraulic output stable under load changes.

A single reversing pump and 6/2-way valve handle actuation, cooling, and lubrication in a drivetrain while avoiding extra pump complexity.

Motor current signals are used to estimate actuator force and quickly limit overloads that can damage gears or other driven elements.

Direction-specific pump control laws keep engine speed consistent in forward and reverse starts, improving driver comfort and vehicle performance.

A block device on the selector drum prevents accidental neutral engagement from first gear while still allowing rider-controlled neutral selection.

By allocating excess oil to shift elements by hydraulic capacity, this case maintains fast gear shifts while preventing overload and pressure drops.

A single integrated shift slot combines range and gear selection, improving position visibility while reducing shifter size for vehicle fitting.

Overlapping gear and shaft recesses let an elastic snap ring secure a parking lock gear axially while minimizing radial space and easing assembly.

A two-lever spring and roller carriage layout delays latch engagement until a wheel hollow aligns, reducing ratcheting wear in gearbox parking locks.

A buffer volume with overflow keeps the valve piston covered in hydraulic medium, preventing air ingress and foaming even above the oil sump.

Sensor-based displacement control limits engine negative torque and overspeed in hydrostatic transmissions during rapid acceleration and deceleration.

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

A CVT control strategy raises gear ratio above a virtual fixed gear at low speed to avoid stalling while preserving smooth, expected acceleration.

Sequentially raising engaging and disengaging hydraulic pressure suppresses torque shock during automatic transmission clutch release.

A spring-loaded barrel-cam actuator absorbs force during blocked dog clutch shifts, then completes fork travel when alignment is restored.

Calibrated springs and a TCC exhaust valve rebalance hydraulic pressure to speed upshifts and improve torque converter clutch holding.

Rotation angle sensors identify shift valley bottoms without collision, preserving transmission durability while maintaining positioning accuracy.

Inclined locking members let the shift lever reach Park without power while reducing shock and preventing unintended gear changes.