A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS
2018-02-15
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 |
COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS
European Patent Office | 2017
|COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS
European Patent Office | 2018
|Coordination of vehicle actuators during firing fraction transitions
European Patent Office | 2018
|Coordination of vehicle actuators during firing fraction transitions
European Patent Office | 2018
|Coordination of vehicle actuators during firing fraction transitions
European Patent Office | 2019
|