IMPLEMENTING SKIP FIRE WITH START/STOP FEATURE

摘要

A variety of methods and arrangements for implementing a start/stop feature in a skip fire engine control system are described. In one aspect, the implementation of the start/stop feature involves automatically turning off an internal combustion engine under selected circumstances during a drive cycle. A determination is made that the engine should be restarted. During the engine startup period, the engine is operated in a skip fire manner such that a desired engine speed is reached.

主权项

1. A method for implementing a start/stop feature in a skip fire engine control system, the skip fire engine control system including an internal combustion engine having a plurality of working chambers, the method comprising:
implementing a stop/start feature that involves automatically turning off the engine under selected circumstances during a drive cycle; determining that the turned off engine should be restarted; and during an engine startup period, operating the engine in a skip fire manner until a desired engine speed is reached wherein the skip fire operation of the engine involves firing at least one selected working cycle of at least one selected working chamber and deactivating at least one selected working cycle of at least one selected working chamber such that air does not pass through the at least one working chamber during the at least one deactivated working cycle wherein the working chambers are arranged to be hydraulically deactivated using oil pressure and the oil pressure is raised before firing any working chambers so that skipped working chambers can be deactivated.