Functional Overview

When the accelerator pedal is moved, the PWG provides a change in the monitored signals. The ME 7.2 compares the input signal to a programmed map and appropriately activates the EDK motor via proportional pulse width modulated control signals. The control module self-checks it's activation of the EDK motor via the EDK feedback potentiometers.

Fig 1: Identifying Integral Electric Throttle System (EML)

Courtesy of BMW OF NORTH AMERICA, INC.

Requirements placed on the Electric Throttle System: 

• Regulate the calculated intake air load based on PWG input signals and programmed mapping.
• Control idle air when LL detected with regard to roadspeed as per previous systems.
• Monitor the driver's input request for cruise control operation.
• Automatically position the EDK for accurate cruise control (FGR) operation.
• Perform all DSC III throttle control interventions.
• Monitor and carry out max engine and roadspeed cutout.