Multiple path air mass flow sensor assembly

Details Multiple path air mass flow sensor assembly Multiple path air mass flow sensor assembly

2007-06-28

2009-10-06

Caputo, Lisa M (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Monitoring intake air system

C073S114320, C073S861000

Reexamination Certificate

active

07596991

ABSTRACT:
A multiple path air mass flow sensor assembly includes an inlet duct which is divided into at least two separate ducts. A first duct has an air mass flow sensor disposed in conventional fashion therein. A second duct includes a damper or valve which may be selectively, partially or fully opened. At low air flow rates, the damper is closed forcing all air through the first duct. As engine speed increases and the air mass flow rate increases, the damper opens, either fully at a predetermined flow rate or proportionally over a predetermined flow rate range, to allow a larger volume of air through the inlet duct. The signal from the air mass flow sensor is adjusted by the engine controller to compensate for the (bypass) air flowing through the second duct.

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