Exhaust Gas Recirculation TRIZ Cases

An eccentric regulating element with guide ribs directs air flow through an engine intake housing to optimize alignment and reduce turbulence.

Upstream EGR valve placement prevents carbon deposits while external vacuum source frees volume for larger heat exchanger.

Curved intake pipes feature internal EGR gas passages formed at joint surfaces of divided pieces to optimize space usage.

An air intake apparatus uses a separate internal external gas passage to thermally isolate recirculated exhaust from the main body.

Integrating fuel inlet, outlet, and compensation ports via an intermediate part reduces device complexity and assembly steps in hand-held work devices.

A fluid circulation valve uses a separate housing with projecting reliefs to receive the magnetic sensor target.

A metal sleeve overmolded with plastic forms a flap body that ensures precise positioning and secure attachment to the drive shaft.

Multipole high frequency discharge igniter uses in-line capacitors to produce simultaneous sparks across multiple gaps.

A dual valve system manages exhaust gas recirculation flow in internal combustion engines.

A vehicle cooler tube uses a clad structure with a sacrificial bonding layer to protect the core material.

An elongated through-hole aligns with exhaust gas flow to distribute EGR intake uniformly across the cooler inlet area.

Vertical heat exchange tubes lower flow resistance while maximizing heat exchange performance in compact exhaust gas cooling apparatuses.

Replacing a heavy cast flange with a forged design reduces weight, cuts material costs, and eliminates complex mechanical reworking.

A rotary exhaust gas recirculation valve uses a tapered upstream flow regulating part to widen the passage and improve angular resolution.

A dedicated vent line recirculates exhaust gas from the pre-chamber to prevent residue accumulation and maintain reliable ignition at low engine loads.

A compact exhaust gas recirculation device merges high and low pressure pathways within a single housing structure.

A movable wall member adjusts the air intake cross-section to generate a Venturi effect for EGR gas suction.

An engine intake device uses chamber edge segmentation to direct airflow into a swirling main stream for effective exhaust gas recirculation mixing.

Radial flexible arms center the plunger, reducing axial length and assembly effort in exhaust valves.

Liquid coolant circulation prevents thermal deformation of sealing systems while distributed protrusions improve connection stiffness.

Stainless steel supporters brazed to aluminum tubes prevent corrosion at bonded portions, maintaining stable coolant flow and durability.

A flow housing integrates pressure sensors to measure exhaust gas mass flow directly within the actuator mechanism.

Variable overflow ports connect adjacent combustion chambers to enable gas expansion during partial load operation.

An intake manifold integrates an EGR flow measurement system with a mixing duct to combine fresh air and exhaust gas.

A dedicated compressor captures engine exhaust gas and raises its pressure for transport through a natural gas pipeline.

Segregating exhaust gas flows preserves pulsation energy and reduces pumping loss during air intake mixing.

Segmented two-layered flap with distributed welded seams absorbs pressure pulsations, preventing joint failure under dynamic stress.

A continuous cross-section decrease accelerates and directs exhaust gases to engine cylinders, eliminating separate diffuser components.

A recirculation valve routes cooled exhaust gas back to the EGR cooler inlet to manage flow dynamics.

An integrated EGR heat exchanger uses an inclined deaeration chamber to evacuate trapped gas and condensation from the coolant circuit.

Segmented intake manifold supports absorb frontal crash loads to protect the fuel delivery pipe without increasing weight.

A throttle valve uses an offset rotation axis and spherical peripheral surface to create linear contact sealing against the housing seat.

Independent rotation of nested perforated pipes adjusts relative positions to optimize exhaust gas mixing and emissions control.

Asymmetric second gas passage curves relative to the first to reduce inertia effects, preventing unequal EGR volume distribution and pressure fluctuations.

Laser bonding and brazing aluminum EGR cooler components prevent coolant leakage while maintaining corrosion resistance in condensate environments.

Segmented exhaust gas recirculation lines accelerate lubricant heating, reducing fuel consumption and emissions.

Segmented cooling stages with dynamic flaps adjust thermal capacity to prevent component sooting during low-load engine operation.

Segmenting the generator into two units driven by counter-rotating crankshafts balances vibratory torques and reduces noise in compact hybrid systems.

A partially flexible exhaust gas recirculation line incorporates a closed pipe section to mix intake air and exhaust gas.

A hot gas control valve removes combustion residues via a housing-side scraping edge, preventing bearing seizure and maintaining consistent rotary actuation.

A sensor device uses a convexly curved detection element to measure shaft displacement along its longitudinal axis.

A rotary valve phases exhaust gas delivery with crankshaft angles to balance mass flow rates across engine RPM ranges, enhancing NOx reduction.

A flap device uses a projection and receiving element to seal the actuator housing.

Segmented cores and dynamic valves regulate outlet temperatures under varying loads, resolving trade-offs between thermal precision and structural complexity.

Modified cam lobes adjust pump displacement to balance fuel delivery across dedicated EGR cylinders, resolving common rail pressure oscillations.

A vertical drain connector links the intake manifold and exhaust passage to a fluid collector, routing liquid away from engine cylinders.

Constant or increasing bent passage area reduces pressure loss, improving maximum EGR gas flow rate without enlarging valve frame size.

A low-pressure EGR valve uses a curved connecting surface to direct condensate flow from the outlet toward the exhaust gas inlet.

Throttling fresh air upstream creates a pressure drop that drives reliable exhaust gas recirculation at low pressures.

Inclined lever abutment compensates thermal expansion displacements, preventing jamming and leakage in internal combustion engine flap devices.