COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS

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COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS

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SERRANO LOUIS J / CARLSON STEVEN E / HAASE STEVEN J / DIBBLE DONAVAN L / RAYL ALLEN B

A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or other 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.

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Title :

COORDINATION OF VEHICLE ACTUATORS DURING FIRING FRACTION TRANSITIONS

Contributors:

SERRANO LOUIS J (author) / CARLSON STEVEN E (author) / HAASE STEVEN J (author) / DIBBLE DONAVAN L (author) / RAYL ALLEN B (author)

Publication date :

2018-06-28

Type of media :

Patent

Type of material :

Electronic Resource

Language :

English

Classification :

IPC:

F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / 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 / F02P IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES , Zündung von Brennkraftmaschinen mit innerer Verbrennung, ausgenommen Kompressionszündung