초록 ▼

This invention is a method and system for a hybrid electric vehicle adaptive fuel strategy to quickly mature an adaptive fuel table. The strategy adaptively alters the amount of fuel delivered to an internal combustion engine to optimize engine efficiency and emissions using engine sensors. Before t

This invention is a method and system for a hybrid electric vehicle adaptive fuel strategy to quickly mature an adaptive fuel table. The strategy adaptively alters the amount of fuel delivered to an internal combustion engine to optimize engine efficiency and emissions using engine sensors. Before the adaptive fuel strategy is permitted, an engine "on" idle arbitration logic requires the HEV to be in idle conditions, with normal battery state of charge, normal vacuum in the climate control and brake system reservoir; and, the vapor canister not needing purging. The strategy orders the engine throttle to sweep different airflow regions of the engine to adapt cells within the adaptive fuel table. In the preferred configuration, a generator attached to the vehicle drive train, adds and subtracts torque to maintain constant engine speed during the throttle sweeps.

대표청구항 ▼

1. A system to mature adaptive fuel tables for a hybrid electric vehicle comprising:means for determining that an adaptive fuel table is not mature; means for determining that an adaptive fuel strategy is allowed under a system idle arbitration logic to mature the adaptive fuel table; means for orde

1. A system to mature adaptive fuel tables for a hybrid electric vehicle comprising:means for determining that an adaptive fuel table is not mature; means for determining that an adaptive fuel strategy is allowed under a system idle arbitration logic to mature the adaptive fuel table; means for ordering an engine throttle to sweep through different airflow regions of an engine; means for collecting fuel shift data from a plurality of engine sensors during the throttle sweep until the adaptive fuel strategy orders data collection to stop; and means for adapting the fuel shift data from engine throttle sweep data in the adaptive fuel table.