Pumping loss reduction systems and methods

Details Pumping loss reduction systems and methods Pumping loss reduction systems and methods

2009-12-02

2011-12-27

Kwon, John (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S435000, C123S332000, C060S285000

Reexamination Certificate

active

08086390

ABSTRACT:
An engine control system comprises a base air per cylinder (APC) module, a catalyst temperature adjustment module, an ambient temperature adjustment module, and an APC adjustment module. The base APC module determines a base APC to reduce first engine pumping losses during a first deceleration fuel cutoff (DFCO) event relative to second engine pumping losses during a second DFCO event. The catalyst temperature adjustment module determines a catalyst temperature adjustment based on a catalyst temperature during the first DFCO event. The ambient temperature adjustment module determines an ambient temperature adjustment based on an ambient air temperature during the first DFCO event. The APC adjustment module selectively adjusts the base APC based on the catalyst temperature adjustment and the ambient temperature adjustment and controls at least one of the engine airflow actuators based on the adjusted base APC during the first DFCO event.

REFERENCES:
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patent: 7698048 (2010-04-01), Jung et al.
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patent: 2009/0037073 (2009-02-01), Jung et al.
patent: 2010/0242933 (2010-09-01), Anilovich et al.

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