Abstract: An engine forming part of a machine is controlled in order to effect a predetermined machine speed limit. One or more engine control parameters are determined based on a theoretical engine speed limit that is based on the predetermined machine speed limit and variable machine parameters. This comprises on or more of: varying a control software engine speed limit from a first engine speed value to a desired engine speed limit value that is based on the theoretical limit; setting the control software engine speed limit at a locked engine speed limit value that remains constant when the theoretical limit is within a set range; setting an engine governor gain based on the theoretical limit; setting control software engine speed filter parameters based on the theoretical limit; and determining control commands to prevent the machine transmission from changing gears based on the engine speed limit with a hysteresis applied.