Delphi Technologies Inc.

Delphi Reduced Noise Automotive Ventilation System uses two blowers, a front mounted blower that pulls outside air in, and a rear mounted fan that exhausts interior air from the cabin space. By pulling and pushing in series, the speed of each blower is reduced.

The two blowers also operate in series in recirculation mode, recirculating interior cabin air from front to rear and then back to the front through a common duct. Since the return leg of the flow in recirculation is through a continuous, closed common duct, there is no direct, open noise path from either blower to the cabin space. The reduced fan speed and the closed duct reduce blower noise within the cabin space.

In the embodiment disclosed, two blower housings are used: a ventilation housing at the front of the cabin space and an exhaust housing at the rear. A continuous duct runs from the exhaust housing to the ventilation housing, taking the place of the under-dash opening into the ventilation housing for recirculated air. The ventilation housing has a valved blower that, in ventilation mode, pulls outside air into the cabin space. In recirculation mode, the blower pulls air from the front of the common duct. The exhaust housing has a blower that, in an exhaust mode, pulls in cabin air and exhausts it, under power, outside the vehicle. In ventilation mode, the air blows into the rear of the common duct and back toward the ventilation housing.

Potential Applications

Classification

Engineered Materials: Metals

Patent Number

6,361,429, Reduced noise automotive ventilation system

Inventors

Pawlak, III; John Lawrence, Capp; Steven Patrick

Contact Information

Tim Forbes
[1] 248.813.8065
timothy.forbes@delphi.com