Hybrid powertrain engine speed and position estimation for pulse compensation

Abstract

A hybrid electric vehicle (HEV) includes an electrified powertrain and driveline including an internal combustion engine, a first electric motor configured as a starter/generator, and a second electric motor configured as an electric traction motor. A powertrain control system includes a controller having a compensation algorithm to estimate engine pulses based on engine position and speed data. The powertrain control system is programmed to determine the HEV is active, determine an activation request for the engine, predict a position and speed of the engine to reduce closed loop measurement and actuation delays of the controller to zero, determine a motor torque to compensate for the engine pulses based on the predicted position and speed of the engine, and operate the first and/or second electric motors with the determined motor torque to compensate for the engine pulses.

Dependencies are inferred from the claim text.