Fluid Actuated Clutches TRIZ Cases

A clutch pawl uses an intermediary return spring to restore position against a ratchet wheel without a dedicated lug.

Embedded wear indicator releases particulate matter upon friction plate erosion, eliminating manual disassembly and reducing maintenance downtime.

Radial slots on wet clutch core plates attenuate axial displacement to minimize spin losses and thermal degradation at high rotational speeds.

Pneumatic toothed sleeves disconnect drivetrain axles to reduce fuel consumption and tire wear in heavy cargo vehicles.

A compact airactuated cone clutch fan assembly uses a central piston mechanism to reduce size and weight.

Shift actuator moves transmission to neutral before engine start, eliminating manual intervention and preventing starting failures.

Switching valve blocks pressure supply to third engagement element, preventing unexpected shocks from solenoid failure.

A sheet metal cylinder uses segmented synchronization profiles with circumferential supporting elements to maintain structural integrity.

Opposing dual actuators compress the clutch pack to distribute heat evenly, eliminating localized temperature spikes without increasing assembly size.

A plastic cylinder housing uses a conical reinforcement sleeve fastened via a snap connection to resist hydraulic pressure.

A transmission shaft pressure relief valve adjusts opening thresholds based on rotational speed to stabilize clutch engagement.

A lock-up device uses a guide plate to constrain damper spring movement within the clutch piston.

A hydraulic filler reduces cavity volume between retainer rings to equalize cylinder pressures, minimizing startup time for spring pack restoring force.

An intermediate plate with plastically deformed contact lugs increases friction surfaces for higher torque transmission.

Asymmetrical openings in the support cup bushing guide the retaining ring to reduce eccentricity and lower axial force during bearing engagement.

Extended shaft eliminates splined connection to resolve stress concentrations and increase torque capacity.

Directly connected electric oil pump eliminates solenoid valves, reducing transmission complexity while minimizing friction clutch slip during shifts.

Controller limits acceleration using a hydrostatic unit, allowing the clutch piston to retract and disengage despite centrifugal head pressure.

Axially extending guiding surface constrains coil windings during compression, eliminating radial displacement and preventing mechanical jamming.

An overrun mechanism merges with the clutch input side to eliminate a separate multi-plate clutch, reducing construction complexity and weight.

Airflow through vented clutch plates evacuates abrasion powder, reducing drag and preventing faulty engagement in hybrid transmission devices.

Rotational shaft oil passage supplies lubricating oil to clutch parts using coaxial upstream and parallel downstream channels.

An additional magnetic field sensor detects stray fields to cancel interference in active clutch actuator sensors, eliminating physical shielding weight.

Threaded piston connection eliminates radial play to prevent seal gap extrusion and reduce manufacturing costs.

Sectorial oil grooves in friction plates use centrifugal force to discharge lubricant, reducing drag torque in miniaturized wet clutches.

Annular wall portion absorbs welding heat during clutch drum joining, eliminating surface processing needs and maintaining inner peripheral surface accuracy.

A wear measurement device injects pressurized fluid to determine the gap between a contact part and a biasing member.

A shifting device synchronizes rotational speeds using frictional fit rings and form-fit actuating rings for smooth gear engagement.

Segmented bulkhead channels direct independent fluid paths to the clutch pack and motor, resolving thermal management bottlenecks in compact hybrid modules.

Overlapping oil supply holes in a hydraulic clutch reduce drag torque and change hitting sounds during disengagement.

Hydraulic adjustment compensates for clutch disc wear by varying coupling element length, resolving friction reliability contradictions.

An on-demand electric lube pump directs fluid through solenoid valves to an accumulator, eliminating energy losses from continuous wet sump operation.

A cooling valve regulates hydraulic fluid distribution between engine-driven and gear-set-driven pumps to prevent system pressure deficiencies during actuation.

Real-time pressure adjustment compensates for temperature and draining variability to ensure consistent clutch filling.

Non-rotating hydraulic actuator body resists reaction forces via clutch cover while spigots supply fluid to engage four-wheel drive independently.

Axial seal shape prevents lip turn-up and reduces reaction forces during axial movement in automatic shift gears.

Porous clutch hub design with openings in spline teeth reduces centrifugal stress and deflections while maintaining structural integrity.

A multi-stage transmission clutch uses a bearing-supported piston to apply hydraulic engagement pressure directly from the case.

Variable cross-section grooves reduce oil leakage while maintaining lubrication, minimizing drag torque in torque converters.

Obliquely oriented sinusoidal waves on friction plates prevent gyroscopic tumbling and reduce spin losses at high differential speeds.

Hydraulic chambers maintain clutch pressure during engine start-stop to eliminate hesitation without electric pumps.

An axial piston arrangement eliminates fork shaft bending forces that destabilize oil seals and reduce operational reliability.

An orifice in the concentric slave cylinder restrains reverse oil flow to prevent negative pressure and reduce ineffective stroke during quick pedal return.

A friction plate with tapered oil passages reduces drag torque by facilitating smooth oil drainage and dynamic pressure separation.

Snap hooks on a hydraulic piston seal carrier engage piston recesses to create axial pretension, eliminating play between components.

Concentric return springs resolve the space-torque trade-off by nesting within the rotating shaft to reduce engagement time without precise hydraulic control.

Integrating clutch drums eliminates rivets, reducing weight and assembly time while maintaining structural strength.

Variable pump speed fills the clutch cylinder rapidly while avoiding excessive pressure that causes noise and jolt-like accelerations.

A secondary pressure circuit supplies hydraulic fluid to a torque converter torus interior via a valve device and restrictor.