Internal Combustion Piston Engines TRIZ Cases

Variable valve lift from a double-structure ball-cam camshaft cuts pumping loss in six-cycle engines while helping maintain output and efficiency.

Abnormal trajectory points are removed from parking sample data to train a more reliable autonomous parking model under real road disturbances.

On-board UWB and IMU sensing guides multi-UAV formations through frame-shaped obstacles without GPS or cameras in low-light environments.

Circular bores and affixed vane shafts let one turbocharger nozzle ring support multiple fixed-vane angles without new mold tooling.

Epipolar geometry keeps a rotary-wing UAV aligned to its planned shelf path, improving warehouse stocktaking accuracy with fewer sensors.

Trackside laser radars and cameras build a 3D rail model to warn drivers earlier when weather, speed, and limited visibility hide hazards.

A vacuum-actuated second sealing seat helps a gas injector prevent fuel diffusion during inactivity while avoiding complex or heat-prone sealing designs.

A laterally extending plate spring replaces the helical spring to shorten valve axial length while maintaining pressure regulation and relief.

Different thermal expansion materials in the wastegate flap and housing prevent blockage while maintaining sealing clearance and low leakage.

A press, shafts, and two-hand controls remove and insert DECD cores with precise alignment, improving refurbishment speed and operator safety.

A non-circular wastegate valve port with a raised rim improves sealing precision, reduces leakage, and supports accurate actuator tuning.

Overlapping valve and nozzle protrusions guide hydrogen jets, raising pressure and limiting vortices and auto-ignition in H2 engines.

Hydraulic decore and recore shafts streamline DECD core replacement while reducing housing and core damage during refurbishment.

A press station with pushout tools, spacers, and a stuffing funnel standardizes DECD core replacement while limiting housing and core damage.

An integral cast wastegate valve assembly enables relative rotation for even wear, better sealing, and higher turbocharger durability.

A dual-acting valve redirects cold-start exhaust to a close-coupled bypass catalyst for faster light-off, lower emissions, and controlled backpressure.

Radially overlapping nozzle and valve protrusions steer hydrogen flow, boosting pressure and limiting vortex-driven auto-ignition in the chamber.

A secured guide template aligns drill bits with broken manifold bolt holes, improving removal accuracy while protecting the cylinder head.

A route-first, penalty-guided track search reduces nonlinear planning load for work vehicles while preserving continuous obstacle-avoiding motion.

Elevated and recessed contact surfaces trap wear debris in a wastegate valve, limiting vibration-driven axial wear and preserving sealing.

Standardized drill jigs and bushings stabilize locomotive bedplate drilling to improve dowel hole alignment, safety, and shop consistency.

A dual-damping bearing structure limits axial impeller movement while damping radial vibration to prevent housing contact and gas leakage.

A bearing-fed lubricant layout with conduits and spray bars keeps misaligned planetary gears lubricated, reducing wear, breakage, and maintenance.

Brain-like short- and long-term memory with image and BERT features helps unmanned surface vehicles make more accurate decisions in complex sea conditions.

Real-time 3D perception combines global and local path optimization with deep reinforcement learning to improve UAV routing and landing.

A hermetic ship exhaust capture assembly uses adaptors, valves, and flow control to treat harbor idle emissions while maintaining temperature and pressure.

Contactless inductive heating links SCR line and connector conductors without exposed contacts, reducing delamination, leakage, and assembly effort.

An elongated ridge at a duct branch controls intake-air split and swirl direction, reducing NVH and avoiding added diverter parts.

MPC combined with an improved whale optimization algorithm speeds convergence while keeping multi-UAV ground target tracking stable in obstructed terrain.

An onboard energy storage device powers a heating element to keep the engine block warm in cold conditions without utility power.

An in-situ resistive circuit on a one-piece tubular fluid connection removes manual wire winding, cuts parts, and improves heating consistency.

Inert gas is routed through the outer and inner pipes to purge residual fuel gas without extra engine-side purging lines.

Standardized drill jigs and bushings stabilize locomotive dowel drilling, improving hole alignment, safety, and maintenance efficiency.

Using the exhaust pipe as the flap stop and sealing surface simplifies valve integration while maintaining sealing and high backpressure for engine braking.

A dual-acting valve routes cold-start exhaust through a bypass catalyst to speed light-off, cut emissions, and avoid added backpressure.

Cover plates and posts keep apex, end, and arc seals compressed and aligned, easing rotor insertion and secure storage.

An integral wristpin bore frees oil jet and injector placement, improving piston cooling and compact opposed-piston engine layout.

A polygonal retaining ring and tapered pin create a push-connect turbocharger linkage that cuts play, parts count, and clip cracking.

A large multi-surface lever contact in the turbocharger exhaust flap linkage cuts wear, noise, and seizing under high heat and pressure.

An in-situ resistive circuit on a one-piece tubular connector removes manual wire winding, cutting cost and improving heating consistency.

A fluid-connected insulating air gap lets a thin piston cover cut crown heat transfer while equalizing pressure to prevent deformation.

A three-way rotary bypass valve cuts wastegate leakage and improves exhaust flow control while enabling full turbine bypass for faster catalyst light-off.

A shield-DDPG planner checks each UAV action against air-collision and ground-impact risks to keep urban path planning safe and efficient.

A separated sub tank and coupling member suppress gaseous fuel pressure pulsation while avoiding added weight and preserving engine-bay layout flexibility.

An upstream separator captures urea derivatives before they reach exhaust bellows, preventing deposit damage and preserving flexible joint sealing.

In-situ resistive circuits on a T-shaped shell heat three-way connectors to prevent freezing and blockage in motor vehicle fluid circuits.

Separate inlet and outlet seals, with a softer outlet seal, block EGR gas and condensed water intrusion despite thermal displacement.

A flow deflection device shields silencer openings from core airflow to stop whistling at high flow rates without added pressure loss.

Ultra-fine 3J40 alloy grains and controlled α-Cr and Cr-Al-Ce phases improve large diesel exhaust valve strength, toughness, and vibration damping.

An electrically heated catalyst unit integrates heating and oxidation functions within the exhaust conduit between upstream and downstream devices.

Upstream and downstream NOx sensors feed a controller that calculates NO2 production to detect oxidation catalyst faults and optimize reductant delivery.

Segmented exhaust manifold sections isolate oxidation and hydrolysis catalytic converters to ensure uniform gas streams.

Positioning a temperature sensor within a dedicated lubricant oil storage part eliminates air interference and stabilizes readings under high back pressure.

A control system tracks minimum flow resistance values to compensate for ash accumulation in engine aftertreatment elements.

A sector-divided turbine housing with convergent passageways accelerates exhaust gas flow onto a statorless axial turbine wheel.

A variable geometry nozzle adjusts main and tandem blade positions relative to each other using a single movable support.

A movable valve degressively opens a through-flow opening between spiral channels in an exhaust gas turbocharger.

Modified aluminum borate carrier with lanthanum oxide maintains catalytic performance under high-temperature conditions.

A secondary diesel particulate filter measures differential pressure to calculate soot mass in a branched exhaust line.

A controller calculates reduction agent dosage using reaction approximations for real-time SCR system adjustments.

Segmented upstream and downstream catalyst layers use distinct noble metals to prevent sintering while maintaining high purification performance.

Heating blanket clamped between pump and filter assembly by shaped retention plate for compact exhaust aftertreatment fluid delivery.

A two-stroke muffler uses an inertia chamber to direct exhaust gas flow and create temporary overpressure within a compact volume.

Secondary passages inject air into primary fuel streams via Venturi geometry, resolving poor mixing efficiency without increasing structural complexity.

Segmented manifolds and crimped boxes enable mass-produced bundles to fit varied vehicle layouts without specialized holding tools.

Unequal circumferential flow path widths between turbine blades disperse pressure fluctuations to reduce noise without widening the tongue gap.

Nanometric cerium oxide particles deposited on a support substrate resolve low-temperature reducibility bottlenecks in exhaust gas catalysts.

Arranging the reduction catalyst upstream allows exhaust gas heat to reach operating temperature without electrical heating.

Traffic management platform captures road videos to predict cleanliness and flow, directing sweepers with precision.

Segmenting coolant flow into counter-current and curved paths enhances cooling capacity while maintaining low pressure loss.

A variable displacement engine adjusts piston stroke dynamically to optimize power delivery across varying operational conditions.

Composite adjustment pin pairs welding bolt with wear-resistant sleeve to secure high weld quality while maintaining durability against operational wear.

A pump control unit monitors rotation speed to calculate actual injection amounts and detect valve abnormalities.

A diagnostic device uses a single upstream pressure sensor and low-pass filtering to detect particulate filter presence without downstream measurements.

A shovel controller increases hydraulic pump discharge pressure before load application to raise supercharger boost pressure.

A segmented valve needle with a sac volume step creates turbulent flow dynamics that transfer kinetic energy to residual fuel, reducing carbon emissions.