Hybrid Vehicles TRIZ Cases

Starting the electric oil pump only after cranking ends and voltage recovers keeps clutch pressure responsive without larger low-voltage hardware.

A W-belt with inward and outward contact faces balances pulley engagement in nested CVTs to reduce wear, slipping, and efficiency loss.

Separate bearing paths split dual-clutch actuation loads to avoid overload, extend bearing life, and keep hybrid modules compact.

A second hydraulic machine keeps return-line pressure above a minimum level, preventing cavitation while enabling energy recuperation.

A mixed mechanical-electric propulsion layout cuts long-distance power losses while preserving modular propulsor placement and reconfiguration.

Pre-activating the locked clutch before gear release prevents roll-away, noise, and start-up delay in dual-clutch parking lock operation.

Motor-generator control of a layshaft hybrid gearbox decouples driven equipment at start-up and varies ratio without VFD torsional issues.

An annular disc spring layout cuts hybrid clutch package space and drag torque while maintaining reliable actuation and torque transfer.

A two-bearing clutch layout routes both clutch actuation forces through shared axial support, cutting assembly effort, cost, and package space.

A common support body and disk carrier compact a triple clutch assembly, cutting parts and installation space while supporting torque and actuation loads.

A decoupling valve separates high-pressure clutch control from cooling flow, improving shift stability while reducing electronic pump load.

A monostable sliding sleeve with an elastic return member cuts clutch drag torque while keeping torque transfer compact for hybrid and electric vehicles.

Dual clutching switches torque flow from the converter to a bypass shaft at high speed, cutting inertia and hydraulic load in EV powertrains.

Torque sensors across engine, motor, and gearbox inputs let the controller isolate faults, prevent damage, and maintain aircraft propulsion.

An accumulator and support hydraulic machine cover peak flow demand, letting work machines run lower engine speeds with better fuel efficiency.

A cam-driven friction engagement scheme switches reduction ratios without hydraulics while preventing accidental parking-lock engagement and easing release.

A shared-axle electric machine with two hydraulic machines enables energy recuperation, flow support, and backup operation with lower system complexity.

Leaf springs mount clutch plates to allow axial movement with minimal rubbing, cutting friction loss and jamming in hybrid drivetrain clutches.

Estimating dog clutch tooth overlap reveals torque capacity and gear degradation, enabling timely shifts before commanded torque causes damage.

Motor torque is swept until clutch torque briefly vanishes, enabling lower-force disengagement with less wear and smaller actuators.

Multiple elastic bodies and an intermediate member create staged torsional rigidity changes that suppress impact and vibration during switching.

Adaptive fast-fill timing and pressure use existing operating signals to offset air pockets in hydraulic actuators without extra sensors.

A dual-valve hydraulic scheme narrows linear solenoid control range while adding ON-OFF high pressure for accurate, responsive full clutch engagement.

A second hydraulic machine adds make-up flow or recuperates return energy, improving fuel efficiency and reducing losses in working machines.

Pressure-based return-flow routing lets one hydraulic machine support another, improving efficiency, flexibility, and redundancy in working machines.

Axially supporting slave cylinders on a housing-fixed bearing cuts clutch package space and assembly complexity while keeping actuation stable.

A torque-triggered positive-locking unit lets a compact multi-plate clutch handle high torque with lower friction losses and less installation space.

An integrated clutch and brake switching mechanism limits EV back-EMF and driveline shock while simplifying torque transmission control.

An epicycle gear set and controllable brake replace friction clutch release torque, cutting kinetic energy loss in dual-drive electric machines.

During cornering, conditional one-step upshift based on lateral acceleration and turbine speed lowers engine rpm and reduces driver discomfort.

Pressure-based valve routing sends return flow to either hydraulic machine, balancing torque demand, redundancy, and component sizing in working machines.

Compressed air forms a bearing gas curtain to stop oil leakage, while one recovery unit separates and recovers both oil and gas.

A reach-through dry double clutch simplifies electric drive module assembly while cutting cost and improving robustness in vehicle powertrains.

Vehicle surroundings are used to predict deceleration and preselect a shift mode that avoids engine stalling and drive train seizure.

Adaptive EOP speed compensation by shift type and line pressure maintains hydraulic pressure despite transmission leakage and aging.

A rotation-preventing support keeps the magnetostrictive sensor fixed to the case, reducing torque measurement errors on a rotating shaft.

A bent backing plate with radial fingers and an integrated damper improves torque transfer, reduces axial deflection, and limits clutch wear.

Radially movable masses, pistons, and biasing elements let a flywheel adjust inertia and radius to maintain optimal RPM and energy transfer.

Elastic axial mounting sections offset clutch displacement friction, cutting counterforce and helping a hybrid drivetrain module transmit higher torque.

A recessed spring seat supports coil springs without blocking stopper hole elongation, enabling wider torsion angle and better damping of rotational fluctuations.

A two-motor planetary driveline uses friction clutches for smooth two-speed shifting while cutting geartrain losses and transmission space.

A laminated gasket uses low-dynamic-spring-constant rubber to maintain sealability while reducing vibration and noise transmission.

Axially preloaded balls equalize load in a positive-engagement clutch, enabling high torque transfer with less wear than friction-only coupling.

A hierarchical planner splits excavation into task, sub-task, and motion layers to handle trenching, pile removal, and loading efficiently.

Parallel countershafts and a single-planetary variator enable asynchronous shifting, wider speed coverage, and lower transmission complexity.

Multiple inner split pulleys balance off-center forces in a nested transmission, cutting vibration, bearing load, wear, and speed limits.

Oblique teeth and segmented V-ribs let one belt engage toothed or poly-V pulleys while cutting noise and wear in high-speed hybrid drives.

Radially balanced spring segments modulate clutch contact pressure to start the combustion engine with lower wear and less misalignment.

Switching hydraulic, hydro-mechanical, and mechanical paths balances stepless ratio control with higher transmission efficiency and ride comfort.