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A control system for an auto-stop/start vehicle includes a transmission load module, a target engine speed module, and an actuator control module. The transmission load module determines a load imposed on an engine through a transmission. The target engine speed module selectively determines a targe

A control system for an auto-stop/start vehicle includes a transmission load module, a target engine speed module, and an actuator control module. The transmission load module determines a load imposed on an engine through a transmission. The target engine speed module selectively determines a target engine speed during an engine startup event based on the load. The actuator control module controls at least one engine actuator based on the target engine speed during the engine startup event.

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1. A control system for an auto-stop/start vehicle, comprising: a transmission load module that determines a load imposed on an engine through a transmission based on a vehicle weight and a grade of a road;a target engine speed module that selectively determines a target engine speed during an engin

1. A control system for an auto-stop/start vehicle, comprising: a transmission load module that determines a load imposed on an engine through a transmission based on a vehicle weight and a grade of a road;a target engine speed module that selectively determines a target engine speed during an engine startup event based on the load; andan actuator control module that controls at least one engine actuator based on the target engine speed during the engine startup event. 2. The control system of claim 1 further comprising: an auto-stop/start module that selectively shuts down the engine between a first time when a vehicle startup command is received and a second time when a vehicle shutdown command is received and that selectively initiates the engine startup event between the first and second times; andan auto-stop/start disabling module that disables the auto-stop/start module when the load is greater than a predetermined load. 3. The control system of claim 2 wherein the actuator control module selectively applies mechanical brakes during the engine startup event when the load is greater than a second predetermined load, and wherein the second predetermined load is less than the predetermined load. 4. The control system of claim 3 wherein the actuator control module controls the application of the mechanical brakes based on the load. 5. The control system of claim 3 wherein the target engine speed module determines the target engine speed based on whether the load is greater than the second predetermined load. 6. The control system of claim 5 wherein the target engine speed module determines the target engine speed based on a first predetermined profile when the load is greater than the second predetermined load and determines the target engine speed based on a second predetermined profile when the load is greater than zero and one of less than and equal to the second predetermined profile, wherein the first and second predetermined profiles are different. 7. The control system of claim 6 wherein the first predetermined profile approaches a predetermined speed at a greater slope during the engine startup event than the second predetermined profile. 8. The control system of claim 1 further comprising: a correction determination module that determines a spark timing correction based on a difference between the target engine speed and a measured engine speed; anda spark timing adjustment module that determines an adjusted spark timing based on the spark timing correction and a target spark timing and that controls spark during the engine startup event based on the adjusted spark timing. 9. A control method for an auto-stop/start vehicle, comprising: determining a load imposed on an engine through a transmission based on a vehicle weight and a grade of a road;selectively determining a target engine speed during an engine startup event based on the load; andcontrolling at least one engine actuator based on the target engine speed during the engine startup event. 10. The control method of claim 9 further comprising: selectively shutting down the engine between a first time when a vehicle startup command is received and a second time when a vehicle shutdown command is received;selectively initiating the engine startup event between the first and second times; andpreventing the selective shut down when the load is greater than a predetermined load. 11. The control method of claim 10 further comprising selectively applying mechanical brakes during the engine startup event when the load is greater than a second predetermined load, and wherein the second predetermined load is less than the predetermined load. 12. The control method of claim 11 further comprising controlling the application of the mechanical brakes based on the load. 13. The control method of claim 11 further comprising determining the target engine speed based on whether the load is greater than the second predetermined load. 14. The control method of claim 13 further comprising: determining the target engine speed based on a first predetermined profile when the load is greater than the second predetermined load; anddetermining the target engine speed based on a second predetermined profile when the load is greater than zero and one of less than and equal to the second predetermined profile,wherein the first and second predetermined profiles are different. 15. The control method of claim 14 wherein the first predetermined profile approaches a predetermined speed at a greater slope during the engine startup event than the second predetermined profile. 16. The control method of claim 9 further comprising: determining a spark timing correction based on a difference between the target engine speed and a measured engine speed;determining an adjusted spark timing based on the spark timing correction and a target spark timing; andcontrolling spark during the engine startup event based on the adjusted spark timing. 17. A control system for an auto-stop/start vehicle, comprising: a transmission load module that determines a load imposed on an engine through a transmission;a target engine speed module that selectively determines a target engine speed during an engine startup event based on the load;an actuator control module that controls at least one engine actuator based on the target engine speed during the engine startup event;an auto-stop/start module that selectively shuts down the engine between a first time when a vehicle startup command is received and a second time when a vehicle shutdown command is received and that selectively initiates the engine startup event between the first and second times; andan auto-stop/start disabling module that disables the auto-stop/start module when the load is greater than a predetermined load. 18. The control system of claim 17 wherein the actuator control module selectively applies mechanical brakes during the engine startup event when the load is greater than a second predetermined load, and wherein the second predetermined load is less than the predetermined load. 19. The control system of claim 18 wherein the actuator control module controls the application of the mechanical brakes based on the load. 20. The control system of claim 18 wherein the target engine speed module determines the target engine speed based on whether the load is greater than the second predetermined load. 21. The control system of claim 20 wherein the target engine speed module determines the target engine speed based on a first predetermined profile when the load is greater than the second predetermined load and determines the target engine speed based on a second predetermined profile when the load is greater than zero and one of less than and equal to the second predetermined profile, wherein the first and second predetermined profiles are different. 22. A control method for an auto-stop/start vehicle, comprising: determining a load imposed on an engine through a transmission;selectively determining a target engine speed during an engine startup event based on the load;controlling at least one engine actuator based on the target engine speed during the engine startup event;selectively shutting down the engine between a first time when a vehicle startup command is received and a second time when a vehicle shutdown command is received;selectively initiating the engine startup event between the first and second times; andpreventing the selective shut down when the load is greater than a predetermined load. 23. The control method of claim 22 further comprising selectively applying mechanical brakes during the engine startup event when the load is greater than a second predetermined load, and wherein the second predetermined load is less than the predetermined load. 24. The control method of claim 23 further comprising controlling the application of the mechanical brakes based on the load. 25. The control method of claim 23 further comprising determining the target engine speed based on whether the load is greater than the second predetermined load. 26. The control method of claim 25 further comprising: determining the target engine speed based on a first predetermined profile when the load is greater than the second predetermined load; anddetermining the target engine speed based on a second predetermined profile when the load is greater than zero and one of less than and equal to the second predetermined profile,wherein the first and second predetermined profiles are different.