Adaptive feedforward air/fuel ratio control for vapor recovery purge system
AssigneeFord Motor Company
InventorDouglas R. Hamburg
Life of this patent
Estimating the term…
Abstract
Controlling air/fuel ratio perturbations in response to purging of fuel vapors from a vapor canister storing fuel vapors from the fuel tank of an internal combustion engine includes feeding forward an offsetting fuel command signal. The feedforward offsetting fuel command signal is used to change, and thereby compensate, a base fuel command signal applied to a fuel injector controller whenever fuel vapor purging is occurring.
Claims10
A method of controlling air/fuel ratio perturbation in response to purging of fuel vapors from a vapor canister storing fuel vapors from the fuel tank of an internal combustion engine including the steps of:
- generating a base fuel command;
- actuating purging of the fuel vapors;
- and
- feeding forward an offsetting fuel command signal to modify the base fuel command signal whenever fuel vapor purging is occurring in order to compensate for the fuel and air that enter the engine via the purge line thereby reducing air/fuel ratio perturbations.
Dependencies are inferred from the claim text.