Engine startup control systems and methods

1. An engine control system of a vehicle, comprising:

a starter control module that, when a clutch pedal is depressed and a user activates an ignition system, engages a starter motor with an engine and applies current to the starter motor; and

an abort module that selectively generates an abort signal when the clutch pedal is released,

wherein the starter control module disengages the starter motor and disables current flow to the starter motor when the abort signal is generated.

2. The engine control system of claim 1 wherein the abort module selectively generates the abort signal when the clutch pedal is released and the starter motor is engaged with the engine.

3. The engine control system of claim 1 wherein the abort module selectively generates the abort signal when the clutch pedal is released and an engine speed is less than a predetermined speed.

4. The engine control system of claim 3 further comprising a mode determination module that selectively sets an engine mode to a running mode when the engine speed is greater than a second predetermined speed and that sets the engine mode to a cranking mode when the engine speed is less than the second predetermined speed,

wherein the abort module selectively generates the abort signal when the clutch is released, the engine speed is less than the predetermined speed, and the engine mode is set to the cranking mode.

5. The engine control system of claim 4 wherein the mode determination module sets the engine mode to the running mode when the engine speed is greater than the second predetermined speed for a predetermined period.

6. The engine control system of claim 4 wherein the abort module selectively generates the abort signal when the clutch is released, the engine speed is less than the predetermined speed, the engine mode is set to the cranking mode, and the starter motor is engaged with the engine.

7. The engine control system of claim 4 wherein the second predetermined speed is one of greater than the predetermined speed and equal to the predetermined speed.

8. The engine control system of claim 1 further comprising a fuel control module that disables fueling of the engine when the abort signal is generated.

9. The engine control system of claim 1 wherein the starter control module engages the starter motor with the engine and applies current to the starter motor when a clutch pedal position measured using a clutch pedal position sensor is greater than a first predetermined value and the user activates the ignition system,

wherein the abort module selectively generates the abort signal when the clutch pedal position is less than a second predetermined value, and

wherein the second predetermined value is less than the first predetermined value.

10. The engine control system of claim 1 further comprising a display control module that, when the abort signal is generated, generates an indicator on a display that startup of the engine was aborted due to the release of the clutch pedal.

11. An engine control method of a vehicle, comprising:

when a clutch pedal is depressed and a user activates an ignition system:

engaging a starter motor with an engine; and

applying current to the starter motor;

selectively generating an abort signal when the clutch pedal is released; and,

when the abort signal is generated:

disengaging the starter motor; and

disabling current flow to the starter motor.

12. The engine control method of claim 11 further comprising selectively generating the abort signal when the clutch pedal is released and the starter motor is engaged with the engine.

13. The engine control method of claim 11 further comprising selectively generating the abort signal when the clutch pedal is released and an engine speed is less than a predetermined speed.

14. The engine control method of claim 13 further comprising:

selectively setting an engine mode to a running mode when the engine speed is greater than a second predetermined speed;

setting the engine mode to a cranking mode when the engine speed is less than the second predetermined speed; and

selectively generating the abort signal when the clutch is released, the engine speed is less than the predetermined speed, and the engine mode is set to the cranking mode.

15. The engine control method of claim 14 further comprising setting the engine mode to the running mode when the engine speed is greater than the second predetermined speed for a predetermined period.

16. The engine control method of claim 14 further comprising selectively generating the abort signal when the clutch is released, the engine speed is less than the predetermined speed, the engine mode is set to the cranking mode, and the starter motor is engaged with the engine.

17. The engine control method of claim 14 wherein the second predetermined speed is one of greater than the predetermined speed and equal to the predetermined speed.

18. The engine control method of claim 11 further comprising disabling fueling of the engine when the abort signal is generated.

19. The engine control method of claim 11 further comprising:

when a clutch pedal position measured using a clutch pedal position sensor is greater than a first predetermined value and the user activates the ignition system:

engaging the starter motor with the engine; and

applying current to the starter motor; and

selectively generating the abort signal when the clutch pedal position is less than a second predetermined value,

wherein the second predetermined value is less than the first predetermined value.

20. The engine control method of claim 11 further comprising, when the abort signal is generated, generating an indicator on a display that startup of the engine was aborted due to the release of the clutch pedal.