Method of controlling hybrid powertrain having an engine operating under rich combustion

摘要

A method of controlling hybrid powertrain (100, fig 1) comprising a motor-generator electric unit (500) and an internal combustion engine (110), e.g. a diesel. When the internal combustion engine (110) operates under rich combustion conditions and at least a strategy 21, 22 requiring a torque fast transient response is active, the method verifies 23 if the conditions to actuate the motor-generator electric unit (500) are met, and if yes, the motor-generator electric unit (500) is activated 24 to rapidly increase or decrease the available torque to a drive shaft. The strategies 21, 22 which require a fast transient torque may include controlling gear shifting of an automatic transmission AT, traction control TC and control of driveline oscillations. Conditions to actuate the motor (500) may include a state of charge of a battery and batter power. Reference is also made to a hybrid powertrain configured to carry out the method and to a computer program comprising computer code which performs the method.