Exhaust Gas Recirculation TRIZ Cases
- Engine Flap Shaft Bearing Layout for Wear-Compensated Sealing
A dual axial bearing engages only after primary bearing wear, limiting flap shaft shift, leakage, and jamming in engine flow ducts.
- EGR Valve Seat Geometry for Condensate Drainage and Sealing
Concave EGR valve surfaces drain condensate after shutdown while an elastic disc seals in operation, reducing freezing and compressor risk.
- Shaft Valve Assembly for Low-Leakage EGR Flow Control
A uniform-diameter shaft valve with tailored sealing bands improves EGR flow control, limits leakage, and accommodates thermal expansion.
- Integrated EGR Mixing Tube With Sliding Block for Low Pressure Loss
A sliding gas guide block meters exhaust entry and improves fresh-air/EGR mixing uniformity while reducing pressure loss and system complexity.
- Integrated EGR Valve Assembly With Single-Motor Flow Switching
A single rotating control member replaces separate EGR and EHR valves, cutting valve count, size, cost, and actuator energy use.
- Sleeve-Assembled Valve Closure for Low-Leak Exhaust Sealing
Pre-assembling closing bodies on a sleeve cuts inaccessible in-housing welding while maintaining tight tolerances and low leak rates.
- Single-Piece Shaft Valve Assembly for Low-Leakage Gas Flow Control
A single-piece shaft valve with shaped sealing bands cuts leakage, lowers torque, and simplifies gas flow control in EGR-style valves.