INTERNAL COMBUSTION ENGINE CONTROL FOR IMPROVED FUEL EFFICIENCY

摘要

A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles.

主权项

1. A method of controlling the operation of an internal combustion engine having a plurality of working chambers, each working chamber being generally arranged to operate in a succession of working cycles, the method comprising:
operating the engine in a skip fire operational mode, wherein during operation of the engine in the skip fire operational mode, a selected one of the working chambers will be fired during some working cycles and not fired during other working cycles; and adjusting a setting of a component that affects a torque output associated with a selected firing of the selected working chamber based at least in part on a current skip/fire firing history of the selected working chamber.