Dynamic mapping of pedal position to wheel output demand in a hybrid vehicle

摘要

A hybrid vehicle operates in an electric-drive-only mode and one or more modes using an internal combustion engine. A control pedal is movable to respective positions by a driver for indicating a desired vehicle motion. A controller selectably activates the engine according to instantaneous values of a variable wheel output demand and a variable pull-up threshold. The pedal position is converted to a respective instantaneous wheel output demand in response to an initial value from a mapping relationship that is modified in response to a difference between the initial value and the variable pull-up threshold. The pull-up threshold may preferably be dynamically determined according to a state of charge of a battery for powering the electric drive. The modification to the wheel output demand preferably reduces the slope of the mapping relationship near the pull-up threshold to reduce pedal position sensitivity in a region near the dynamically varying pull-up threshold.

主权项

1. A hybrid vehicle comprising:
an electric drive; an internal combustion engine; a control pedal movable to respective positions by a driver for indicating a desired vehicle motion; a controller selectably activating the engine according to a wheel output demand and a variable pull-up threshold, wherein the pedal position is converted to a respective instantaneous wheel output demand in response to an initial value from a mapping relationship modified in response to a difference between the initial value and the variable pull-up threshold.