A vehicle 10 comprising: a power source or engine 12 capable of driving the vehicle; at least one drive wheel 14; a drivetrain 13 coupled between the power source and the drive wheel to transfer drive generated by the power source to the at least one drive wheel, the drivetrain having a lash-width being the rotational travel between where the drivetrain is capable of transmitting drive in one rotational direction and where the drivetrain is capable of transmitting drive in the opposite rotational direction; and a power source controller or ECU 18 configured to: control the power source in response to a throttle input and a drive demand adjustment to suppress torsional oscillations in the drivetrain; calculate a drivetrain lash-condition indicating the rotational position of the drivetrain within the lash-width; and calculate the drive demand adjustment in dependence on the drivetrain lash-condition. The vehicle may also comprise a means to determine a first and second torsional velocity which can be used to indicate the drivetrain is about to or is undergoing lash crossing. The actual drive demand adjustment may be calculated based on multiple drive demand adjustments based on different lash-conditions.
Engine drive control
2017-01-18
Patent
Electronic Resource
English
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |