PROCESS FOR PREHEATING AN EXHAUST GAS PURIFYING DEVICE

摘要

A process for preheating an exhaust gas purifying device for an internal combustion engine. The process includes the steps of interrupting fuel delivery to at least one cylinder of the engine when starting the engine; introducing into the purifying device the air drawn in and exhausted by the cylinder to which fuel delivery is interrupted; and igniting a mixture of the air and added fuel in the purifying device. The air from the cylinder may be introduced into the purifying device either together with or separately from exhaust gases from the other cylinders and at least a portion of the air may be stored before being introduced into the purifying device to equalize the flow. The air may be mixed with the fuel either before or after it is introduced into the purifying device and the fuel with which the air is mixed may include excess fuel accumulated in and exhausted by the other engine cylinders.