System and method for starting a vehicle

A system for a vehicle, comprising:

• an engine;
• and
• a control system communicative with the engine and having at least one controller, the control system being configured to:
• generate a first signal for adjusting the speed of the engine during a first operating mode in accordance with a fixed value threshold;
• determine whether the engine speed has reached the fixed value threshold or whether a time-based threshold has been reached;
• and
• upon a determination that the engine speed has not reached the fixed value threshold, transition to a second operating mode when the time-based threshold has been reached;
• wherein, upon transitioning to the second operating mode, the control system is further configured to command a second target engine speed being greater than the fixed value threshold and generate a second signal for adjusting the engine speed to achieve the second target engine speed.

A method of starting a vehicle engine comprising:

• adjusting a speed of engine during an engine start mode in accordance with a fixed value threshold;
• determining whether a time-based threshold has been reached;
• and
• upon determining that the time-based threshold has been reached without the fixed value threshold being reached, transitioning out of the engine start mode into a normal operating mode that includes accelerating the engine through a resonance frequency zone within a predetermined time period.