Methods and systems for assisted direct start control

Details Methods and systems for assisted direct start control Methods and systems for assisted direct start control

2011-04-26

2011-04-26

Huynh, Hai H (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S113000, C123S179400, C123S179500, C123S179160, C123S1980DC, C123S339110, C123S443000, C123S406470, C123S406530, C123S680000

Reexamination Certificate

active

07933711

ABSTRACT:
Methods and systems are provided for expediting engine spin-down in an engine that is shutdown during engine idle-stop conditions and restarted during restart conditions. In one example, the method comprises, during an automatic engine idle-stop, turning off spark, operating a first cylinder with a rich ratio of air to injected fuel richer than a rich flammability limit, operating a second cylinder with a lean ratio of air to injected fuel leaner than a lean flammability limit, and mixing un-combusted exhaust from the first and second cylinders with exhaust, the exhaust mixture being substantially stoichiometric.

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patent: 1 350 950 (2003-10-01), None
Liu, Xiangying et al., “Methods and Systems for Assisted Direct Start Control,” U.S. Appl. No. 12/699,583, filed Feb. 3, 2010, 35 pages.

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