Duty cycle recording system and method for estimation of damage and remaining life of drivetrain components

摘要

A duty cycle recording system and method is disclosed for a vehicle with a drivetrain having a plurality of components and sensors. The duty cycle recording system may include a control unit and communication link. The control unit may receive sensor readings, compute damage estimates for drivetrain components based on the readings, and compute estimated remaining life (ERL) estimates based on the damage estimates. The communication link may transmit the computed damage and ERL estimates. The control unit may sample transmission torque and speed sensor readings, and for each sample may populate a three-dimensional histogram of transmission torque and speed the vehicle has experienced.

主权项

1. A duty cycle recording system for a vehicle with a drivetrain having a plurality of drivetrain components and a plurality of sensors, the duty cycle recording system comprising:
an electronic control unit comprising a control processor and a control memory accessible to the control processor, the control processor configured to receive sensor readings from the plurality of sensors, which include a transmission torque sensor providing transmission torque sensor readings and a transmission speed sensor providing transmission speed sensor readings, sample the transmission torque and speed sensor readings as a pair, and for each pair of sampled torque and speed sensor readings find a corresponding cell in a three-dimensional histogram data for the sampled transmission torque and speed sensor readings and increment a cell counter of the corresponding cell in the three-dimensional histogram data, compute damage estimates for the drivetrain components based on the accumulated three-dimensional histogram data, and compute estimated remaining life (ERL) estimates for the drivetrain components based on the damage estimates, the control memory storing the three-dimensional histogram data of transmission torques and speeds to which the vehicle has been exposed; and a communication link configured to communicate with the electronic control unit, and to transmit the computed damage and ERL estimates for the drivetrain components.