Front end motor-generator system and hybrid electric vehicle operating method

A motor-generator accessory drive system configured to be installed at a front end of an engine opposite a rear end of the engine at which a flywheel is located, the motor-generator accessory drive system comprising:

• a motor-generator;
• a torque transfer segment having a motor-generator end configured to receive the motor-generator and to transfer torque between the motor-generator end and an accessory drive end of the torque transfer segment;
• and
• an accessory drive coupled to the accessory drive end of the torque transfer segment and arranged to be driven by the motor-generator via the torque transfer segment and to drive at least one accessory;
• and
• a motor-generator system controller configured to
• control at least one of an operating speed and a torque received by the at least one accessory from the accessory drive by controlling at least one of an operating speed and a torque output of the motor-generator,
• receive information on an operating state of an installation environment in which the motor-generator accessory drive system is installed from at least one of sensors and control modules of the installation environment,
• determine based on the operating state information a current operating priority for the installation environment,
• select based on the determined current operating priority which of a plurality of motor-generator operating modes the motor-generator is to be operated, and
• command operation of the motor-generator in accordance with the selected motor-generator operating mode,
• wherein the plurality of motor-generator operating modes includes an accessory drive mode in which the motor-generator generates torque for delivery to the accessory drive.

A motor-generator system controller for a vehicle equipped with a motor-generator accessory drive system, the motor-generator accessory drive system configured to be installed at a front end of an engine opposite a rear end of the engine at which a flywheel is located, the motor-generator system controller comprising:

• a controller configured to
• receive information on an operating state of an installation environment in which the motor-generator accessory drive system is installed from at least one of sensors and control modules of the installation environment,
• determine based on the operating state information a current operating priority for the installation environment,
• select based on the determined current operating priority which of a plurality of motor-generator operating modes a motor-generator of the motor-generator accessory drive system is to be operated, and
• command operation of the motor-generator in accordance with the selected motor-generator operating mode,
• wherein the plurality of motor-generator operating modes includes an accessory drive mode in which the motor-generator generates torque for delivery to an accessory drive of the motor-generator accessory drive system.