Method and system for managing torque of a drivetrain

A vehicle comprising:

• a drivetrain including
• an air intake passage having a throttle valve rotatably coupled therein, said throttle valve being positionable between a first rotational position and a second rotational position,
• an internal combustion engine in fluid communication with said air intake passage, said internal combustion engine having a first output shaft,
• a transmission operatively coupled to said first output shaft, said transmission having a second output shaft, and
• a rotating propulsion member operatively coupled to said second output shaft;
• and
• a control system for managing a torque of said drivetrain, said control system including
• a first sensor operable to provide a throttle position signal indicative of a rotational position of said throttle valve,
• a second sensor operable to provide a vehicle speed signal indicative of a rotational speed of said rotating propulsion member, and
• a controller responsive to said vehicle speed signal to generate a transmission speed signal as an indication of a rotational speed of said second output shaft,
• wherein said controller is further responsive to said throttle position signal and said transmission speed signal to generate an engine speed limit signal as an indication of a maximum rotational speed of said first output shaft.

A method for managing a torque of a drivetrain, the drivetrain including an air intake passage having a throttle valve rotatably coupled therein, the throttle valve being positionable between a first rotational position and a second rotational position, an internal combustion engine in fluid communication with the air intake passage, said internal combustion engine having a first output shaft, a transmission operatively connected to the first output shaft, the transmission having a plurality of gear ratios and a second output shaft, and a rotating propulsion member operatively connected to the second output shaft, said method comprising:

• detecting a rotational position of the throttle valve;
• detecting a rotational speed of the second output shaft;
• and
• generating an engine speed limit signal as a function of said detection rotational position of the throttle valve and said detected rotational speed of the second output shaft, said engine speed limit signal being an indication a maximum speed of the first output shaft.