A PROCESS AND DEVICE FOR LAMBDA CONTROL

摘要

A device for lambda control operates on an internal combustion engine (11) with a catalyst (12) and lambda probes, one (13.v) arranged in front and the other (13.h) behind it. Using integration means (15), the device integrates the difference between the actual value of lambda measured by the rearward probe and the nominal one on which adjustment is to be made. The integration figure is used as a regulating rating for a means (16) of lambda control. This device and the relevant process make it possible to regulate to the actually desired lambda figure even when the forward lambda probe is making false measurements, e.g. owing to hydrocarbons in the exhaust gases in front of the catalyst or, on constant control, the faulty linearisation of the probe characteristic.