Propulsion Power Plants TRIZ Cases

A pivoting transom-mounted cradle stabilizes an outboard motor against vertical and lateral trailering loads without separate steering clips.

Rigid conductor coupling inside the drive housing simplifies marine motor installation, reduces cable damage, and preserves a watertight seal.

Magnetic axial bearing support replaces large mechanical thrust bearings in a watercraft drive, cutting wear, friction, and power loss.

Using the stator as the outer housing increases torque and cooling in a submersible POD drive without enlarging the unit or raising drag.

Elastomeric isolators and compression limiters cut motor-borne vibration transfer in marine drives, improving sound quality and reducing aquatic noise.

A current-limiting inductor and MOSFET path pre-charges and discharges the link capacitor to prevent arcing, heat, and contact welding.

Openings in the torpedo housing expose the motor housing to water for cooling while seals and split housing sections limit water ingress.

Valve-controlled loop sequencing lets marine vessel components share cooling and heating more efficiently while maintaining target temperatures.

A dual cooling path lets electric watercraft batteries stay thermally controlled during charging both on water and out of water.

Rigid conductors and a connector body let marine motor assemblies couple inside the housing, cutting install time, drag, and water ingress.

A fully encapsulated stator uses seawater as a fluid bearing, removing pressure housings and dynamic seals in underwater motors.

Hidden fasteners and segmented cowling panels let a marine drive frame securely house the battery while improving service access and assembly.

Bulk superconductors trap flux in a dual-rotor radial flux machine, reducing interference while raising torque, efficiency, and power density.

A hydrophobic vent conduit relieves motor-cavity pressure and moisture while blocking water ingress to reduce seal degradation.

A plastic stern cap with an integrated mounting thread simplifies electric outboard assembly while preventing galvanic corrosion and water ingress.

A plastic threaded rear cap replaces multi-screw metal fastening to prevent galvanic corrosion, simplify alignment, and seal water out.

An uppermost air vent in the coolant path clears trapped air near the motor controller, improving outboard motor cooling and durability.

A vent conduit with a hydrophobic plug equalizes motor-cavity pressure while blocking moisture and preventing water intrusion.

A planetary gear reducer embedded in the motor flange cuts tunnel thruster height while enabling a smaller, lower-torque motor.

A shared pedal and motor drive path adds on-demand thrust for wind and current while decoupling the motor to avoid drag in manual mode.

By placing the drive source below the decelerator, this outboard motor improves appearance, frees upper space, and helps block stern noise.

A load-bearing battery frame stiffens the watercraft hull while freeing interior space and cutting weight to improve electric range.

Console displays switch to live forward or aft camera feeds so boat operators can monitor riders and surroundings without looking away from the path.

A stern-mounted electric motor and bow battery balance kayak weight, cut draught, and improve control in shallow water.

Parallel low-voltage drive modules sum power through gears and hollow shafts to cut aircraft drivetrain weight while adding redundancy.

Selective motor coupling adds pedal assist in wind or current while avoiding extra pedaling resistance when assistance is off.

A stern-mounted motor and bow battery box balance weight, keep draught shallow, and improve kayak control over long distances.

Routing the harness through a pivot joint protects moving marine propulsion connections from damage while helping seal out water and moisture.

A transom-mounted pivot joint guides and protects the harness from moving parts while preserving drive unit flexibility and a sealed layout.

A detachable top cover, open-bottom box, legs, and grommets protect watercraft electronics from water while keeping maintenance easy.

Rearward battery placement above the drive shaft shifts CG toward the stern, improving personal watercraft stability and interior packaging.

Circumferential oil outlets cool a vertical stator while limiting oil entry into the rotor-stator air gap during tilt and pitching.

An oil accumulation chamber stores lubricant during tilted outboard storage, then drains it to critical parts for prompt restart lubrication.

Dynamic feasible force and torque envelopes let vessel controllers allocate thrust more precisely without overly conservative propulsion limits.

Separated battery and electrical boxes route motor cables through protected passages to avoid steering strain, save space, and ease maintenance.

A spring-biased hinge and damper let an outboard cowl service door unlatch and open in one push while controlling rebound and closure security.

Movable cowling portions keep a marine drive battery protected in use while simplifying insertion, removal, and motor-port access for maintenance.

A user-set runtime and battery charge level are used to cap propulsion output, preventing depletion and reducing range anxiety offshore.

An exposed marine drive frame section dissipates power unit heat to air, cutting cooling complexity while helping block water ingress.

Wireless operator detection cuts engine RPM to idle and shifts to neutral, avoiding sudden shutdown while reducing false triggers at low speed.

An exposed frame section passively dissipates heat from enclosed marine drive power electronics and batteries without fans or cooling fluids.

Magnetic bearing forces support the internal rotor axially, cutting wear and friction losses in compact watercraft drives.

By integrating a closed-loop heat exchanger into the lower drive, outboard motors cut pressure loss, avoid raw water intake, and improve cooling.

Dual absolute and relative position sensing calibrates a marine steering actuator for precise load handling and engine collision prevention.

When authentication devices fail, the system unlocks bilaterally matched propulsion units to keep thrust balanced and maneuvering practical.

Direct stator cooling and rotor fluid isolation improve axial flux machine heat removal, overload protection, and housing simplicity.

Isolated DC bus bars and multi-winding machines raise fuel cell power capacity beyond 2MW while cutting leakage currents and converter losses.

Contact-type conductive members let outboard shells separate without wire reconnection, cutting service time, cost, and risk in tight hull spaces.

Switchable water routing uses battery and water temperatures to heat or cool marine batteries only when heat exchange is beneficial.

A hull flooding chamber adjusts ballast for fast submersion while cooling the motor and electrical components through water flow.

An electric auxiliary thruster enables stable vessel speed below troll thrust while cutting engine noise, vibration, and CO2 emissions.

Fast WED deployment combined with engine trim and steering adjustments stabilizes pitch, roll, and yaw while countering drag and yaw moments.

Pressure sensors track clutch pressure crossover and adjust shift delay to reduce marine transmission NVH and clutch damage.

Multiple fuel supply mechanisms split suction load and vapor generation to prevent vapor lock and maintain steady engine fuel delivery.

A foldable hydrofoil system pivots its wing relative to the strut to adjust orientation and ride height.

Cutting blades mounted on outdrive fins slice through aquatic debris, preventing propeller wrapping and maintaining propulsion efficiency.

Reorienting the crankshaft perpendicular to thrust force lowers the center of gravity while the balance shaft eliminates steering vibrations.

Upward and rearward exhaust path prevents water ingress while allowing lower engine mounting for more usable space.

A tetherless detection system uses handgrip, weight, and orientation sensors to identify operator separation from a powersport vehicle.

A marine drive cowl latching assembly uses a bell crank and detent mechanism to secure cowling portions.