Propulsion Power Plants TRIZ Cases

Variable tooth width on straight bevel gears reduces friction and manufacturing costs while maintaining strength in outboard motors.

Offsetting the propeller shaft axis relative to the pivot bearing reduces stress on the connecting flange while maintaining torque support.

Segmented front and rear housings expand planetary gear train space without increasing lower case diameter to raise water resistance.

Retainer extension prevents nut rotation during vibration, securing the outboard motor against transom dislodgment.

Angular leveling platform supports long shaft drive to prevent engine tilt during shallow water navigation.

Nesting outboard motors within hinged deck cavities frees stern space, while curved surfaces and glossy interiors manage heat and moisture.

A clutch position memorizer stores neutral and gear reference values to establish accurate shift targets.

Spaced input and output shafts linked by a winding transmission resolve layout flexibility constraints in outboard motors.

A lockup clutch mechanism engages during planing to connect the crankshaft directly to the drive shaft.

Segmented baffles separate water from intake air in outboard motors, preventing engine damage from wave surges.

Controller trims marine propulsion device upward to reduce water drag loads on the propeller during operation.

Axial inverter stacking lowers moment of inertia to ease steering while protecting cables from damage.

Stabilizing members contact opposite sides of the motor bracket to inhibit lateral movement during towing without damaging the housing.

A personal watercraft exhaust system routes gases upwardly and rearwardly through a transversely disposed muffler to the hull transom.

Rotatable tiller mount enables ergonomic operator positioning via a locking mechanism, resolving fixed structure limitations.

Electronic control unit sets trim angle targets based on engine speed and operator inputs for outboard motors.

A hull-mounted steerable marine drive integrates trim actuation and a watertight enclosure assembly for precise attitude control.

A U-shaped inflatable hull features a longitudinal V-groove in the bottom to direct water flow upward toward the outboard motor propeller.

Modular floats and pedal propulsion resolve the trade-off between transportability and fishing stability in personal watercraft.

Planing panels between pontoons ride on water, reducing drag and improving maneuverability in tritoon boats.

An outboard motor shift unit uses an intermediate shaft to transmit rotational power for continuous oil pump operation.

Integrated oil passages in the lower case enable direct fluid exchange via a side port without detaching the motor from the boat hull.

Relocating line connections from the cowl opening to a transom adapter eliminates difficult hand access and loose adapter noise.

Segmented exhaust passages divert misfire-induced water vapor away from ceramic sensors, preventing thermal degradation during rapid throttle closure.

Downward air guides in the engine cover separate moisture from cooling air, preventing rust on metal components.

Universal transmission interfaces allow auxiliary motor integration without complex redesigns, minimizing construction effort and maintenance costs.

Curved ducted propellers reduce pressure losses by guiding water flow from side openings, resolving the trade-off between maneuverability and device complexity.

A marine vessel electric propulsion system adjusts motor power output gain via a controller to match sailing conditions.

A removable clamp system applies constrictive force to non-circular structural members for secure accessory mounting.