Method and system for estimating barometric pressure in a...

Details Method and system for estimating barometric pressure in a... Method and system for estimating barometric pressure in a...

2006-08-14

2008-08-19

Phan, Hau V (Department: 3618)

Motor vehicles

Power

Electric

C123S406520, C123S491000

Reexamination Certificate

active

07413043

ABSTRACT:
Barometric pressure is determined in a hybrid electric vehicle from manifold absolute pressure. During engine operation, wide open throttle is commanded and output torque disturbances are offset by the electric machine. Barometric pressure is estimated based on sensed intake manifold pressure and engine speed dependent pressure offsets. During engine shut down, barometric pressure may be determined from manifold pressure without any offset adjustments.

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