Hybrid Vehicles TRIZ Cases

An ON-OFF valve blocks lubricant flow to the drive motor during towing, suppressing circulating-current cable heating while limiting stirring loss.

A transmission-side bulkhead separates fluid chambers and supports brake elements to simplify hybrid module packaging, cooling, and assembly.

When commanded oil flow fails to rise in a vehicle transmission path, torque limiting prevents transfer mechanism overheating.

Event-classified start-stop control grades battery, driver, and engine conditions to balance fuel use, battery protection, and comfort.

Passenger-state detection switches a hybrid EV between pick-up and drop-off modes to balance fuel use, battery charge, noise, and response.

Fast-release electrical storage and regenerative braking help this hybrid powertrain deliver high power with less weight penalty.

Predictive generator torque control smooths engine torsional vibration in range-extended hybrids without adding a heavy flywheel.

Simulated speed and following-distance profiles let cruise control apply torque limits only where fuel savings do not compromise drivability.

A switch-controlled DC-DC output holds gate-drive voltage after battery disconnect to prevent unsaturated semiconductor operation.

Restricting regenerative torque keeps engine speed above the floor resonance region, reducing vibration in series hybrid vehicles.

Selective stop-mode charging uses the drive motor and HSG to raise battery SOC quickly while reducing frequent engine restarts.

Electric motor torque offsets engine load so the high-pressure pump can raise common-rail pressure faster during acceleration and cut emissions.

Dual gear trains raise motor RPM and torque in a hybrid powertrain, improving acceleration and fuel efficiency without a larger motor.

Electrical catalyst heating combined with raising idle speed cuts cold-start emissions by bringing exhaust aftertreatment to operating temperature sooner.

Low-cost engine power is prioritized across vehicle air, cooling, AC, and electrical systems to avoid forced charging and cut fuel use.

An integrated dual-voltage DC-DC module preheats the catalyst in hybrid vehicles without extra 48V circuitry, cutting size and cost.

A concentric primary and auxiliary shaft layout delivers wide gear reduction in a compact electric drive axle gearbox while handling high torque.

A dual-path gear and flexible-member layout delivers multiple ratios with one clutch, reducing transmission complexity, weight, and torque interruption.

Axially offset, freely rotatable gear wheels cut wear and power losses in heavy-duty vehicle transmissions while simplifying clutch layout.

Electric drive moves the vehicle while engine airflow and a heat source warm the SCR faster, cutting cold-start NOx without delaying use.

By matching transmission output shaft and rear driveline speeds with clutch torque control, 4WD low-range shifts stay smooth in motion.

A deployable driven mass and generator convert vehicle motion into onboard charging, extending range without fixed charging stops.

Delayed fuel injection after clutch engagement and motor reaction force control cut fuel loss and drivetrain vibration during hybrid EV engine start.

Detachable battery and range-extender modules let hybrid vehicles match short or long trips while easing replacement and limiting added weight.

Differential rotation thresholds let a dog clutch confirm engagement and release even when the position sensor fails.

Predicts SOC drop to the nearest restriction-zone boundary and guides a hybrid vehicle out before electric-only driving becomes impossible.

A two-planetary hybrid transmission keeps a selected gear engaged so the electric machine can start the engine across varying speeds and loads.

A planetary differential lets pumps start under load and run over a wide speed range without large frequency converters or complex braking.

Persistent recharge-fault alerts and charge thresholds trigger degraded mode and safe vehicle immobilization before the service battery can disable safety devices.

IMU-derived clutch torque enables adaptive pressure control and real-time fault detection under changing wet clutch lubrication conditions.

Switchable epicyclic gearing and separate torsional dampers decouple engine and motor vibrations to improve hybrid drivetrain NVH and comfort.

A heat-radiating base, attachment frame, and insulating sheet enable compact power module assembly with better cooling, reliability, and automation.

Adaptive hydraulic pressure learning suppresses P2 hybrid engine clutch slip during kickdown shifts, improving acceleration and shift feel.

Commanded and measured torque are compared to flag friction-driven engine failure patterns before torque delivery degrades.

Threshold-based engine stop control raises speed only above a set rpm, reducing stop vibration, noise incongruity, and wasted torque.

Automatic switching between battery-only, charging, and boost modes helps a fuel-cell inverter generator meet changing loads with lower noise.

Power transfer between primary and secondary high-voltage batteries prepares one for swap and cuts heavy-vehicle replacement lead time.

Route-based EV/HV mode planning preserves battery charge before regenerative sections, improving energy recovery and destination reachability.

Multiple controller interface pairs and cross-domain links maintain vehicle communication and power paths during faults, improving control reliability.

By splitting the shifting clutch across two shafts, this gear layout cuts output-shaft axial length and improves vehicle mounting.

A universal interface splits OEM torque requests across fuel cell, battery, and motor systems to improve drivability, fuel efficiency, and durability.

A controlled clutch slip with a predefined speed difference enables frequent torque-based friction tracking with minimal impact on vehicle comfort.

An annular chamber buffers compressor bleed air to maintain uniform bearing sealing pressure and avoid surging in a combined power system.

A metal-core insulating cover keeps long battery stack top covers flat, improves fixture alignment, and helps block air ingress.

Charging is enabled only when exhaust temperature, stall margin, and acceleration demand stay within a safe turbomachine range.

Anticipatory deceleration timing blends regenerative and hydraulic braking to prevent braking steps and hydraulic pump noise in self-driving hybrids.

An opposed-piston engine paired with motor-generator transducers improves hybrid fuel efficiency and lowers emissions while maintaining driveshaft torque.

Separate torque paths and gear engagement let a heavy-duty EV PTO run independently of vehicle speed while maintaining stable propulsion.