Accessories drive system including a transmission driven motor generator unit

An accessories drive system for a vehicle, comprising:

• an accessories drive shaft;
• at least one accessory device connected to the accessories drive shaft;
• a combination electric motor and generator device including an input/output shaft;
• a first clutch including:
• a first clutch input arranged to receive torque from an engine for the vehicle;
• and,
• a first clutch output connected to the accessories drive shaft;
• a second clutch including:
• a second clutch input;
• and,
• a second clutch output connected to the input/output shaft;
• a first torque transfer element:
• including:
• a first transfer input connected to the input/output shaft;
• and,
• a first transfer output connected to the accessories drive shaft;
• and,
• arranged to reduce a first speed of rotation of the input/output shaft;
• and,
• a second torque transfer element:
• including:
• a second transfer input arranged to connect to an input shaft for a transmission for the vehicle;
• and,
• a second transfer output connected to the second clutch input;
• and,
• arranged to increase a second speed of rotation of the transmission input shaft, wherein for a generator mode:
• the first clutch is arranged to be opened;
• the second clutch is arranged to be closed;
• and,
• the transmission input shaft is arranged to rotate the input/output shaft via the second torque transfer element.

An accessories drive system for a vehicle, comprising:

• an accessories drive shaft;
• at least one accessory device connected to the accessories drive shaft;
• a combination electric motor and generator device including an input/output shaft;
• a first clutch including:
• a first clutch input arranged to receive torque from an engine for the vehicle;
• and,
• a first clutch output connected to the accessories drive shaft;
• a second clutch including:
• a second clutch input;
• and,
• a second clutch output connected to the input/output shaft;
• a first torque transfer element:
• including:
• a first transfer input connected to the input/output shaft;
• and,
• a first transfer output connected to the accessories drive shaft;
• and,
• arranged to reduce a first speed of rotation of the input/output shaft;
• and,
• a second torque transfer element:
• including:
• a second transfer input arranged to connect to an input shaft for a transmission for the vehicle;
• and,
• a second transfer output connected to the second clutch input;
• and,
• arranged to increase a second speed of rotation of the transmission input shaft, wherein:
• for an electric motor drive mode:
• the first clutch is arranged to be opened;
• the second clutch is arranged to be opened;
• and,
• the combination electric motor and generator device is arranged to rotate the accessories drive shaft via the first torque transfer element;
• and,
• for a generator mode:
• the first clutch is arranged to be opened;
• the second clutch is arranged to be closed;
• and,
• the transmission input shaft is arranged to rotate the input/output shaft via the second torque transfer element.