Exhaust Gas Recirculation TRIZ Cases

Nesting a venturi within the intake manifold reduces system footprint, enabling EGR use in space-constrained engine designs.

Asymmetric thermal expansion in twill weave EGR filters increases effective space to remove carbon deposits and prevent clogging.

A differential pressure sensor mounts directly to an EGR valve body, extending its ports through the gas flow path for accurate measurement.

Extraction of the cooling function to the cylinder head enables short recirculation paths that reduce NOx emissions while improving engine response time.

Relocating the coolant outflow pipe outside the engine block resolves internal space constraints and improves heat exchange performance.

Central exhaust gas recirculation outlet positioning prevents soot deposits on emergency shut-off flaps, maintaining reliable engine operation.

Diesel engine EGR cooler activates coolant only when engine temperature is low, condensing water vapor in soot deposits to expand and peel them off.

A piston-based sealing valve switches between intake and recirculated exhaust gas paths using pressure differences to lock or release the deactivation mechanism.

Dual flaps in a three-way EGR valve adjust air and gas paths to maintain monotonic flow, eliminating complex downstream throttling mechanisms.

A motor control valve seal uses a reinforcement zone to prevent deformation from high pressure and temperature gases, ensuring tightness.