Torque control for direct injected engines using a supplemental torque apparatus
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United States of America Patent
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Jun 27, 2000
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N/A
app pub date -
Sep 21, 1998
filing date -
Sep 21, 1998
priority date (Note) -
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Abstract
A torque control system for a lean burn engine utilizing a supplemental torque apparatus that is operable during the engine mode transition from a lean air/fuel ratio to a rich air/fuel ratio. The supplemental torque apparatus 34, STA, operates to maintain the basic engine torque equation T.sub.e +T.sub.sta =T.sub.d, such that the device or a electrically connected battery 38 absorbs extra engine torque during a predetermined time period and generates engine torque at times other than the predetermined time period. During the predetermined time period, a lean NOx Trap 26 in the exhaust system is purged.
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