Method for managing the exhaust gas circulation circuit of a petrol thermal engine and corresponding recirculation system

摘要

The invention relates to a method for managing an exhaust gas recirculation circuit of a petrol thermal engine, the engine including at least one combustion chamber connected to an inlet line and an exhaust line between which extends said recirculation circuit, the recirculation circuit including a flow-rate adjustment valve, wherein said method comprises the step of adjusting flow-rate adjustment valve based on a flow-rate setpoint, said method further comprising the steps of: detecting an operation parameter representative of a pressure difference between an upstream pressure and a downstream pressure relative to the flow-rate adjustment valve, and, after comparing the parameter with a threshold corresponding to a minimum pressure difference, adjusting the flow-rate in at least one of the lines in order to increase the pressure difference.

主权项

1. A system for circulating the gases of an internal combustion gasoline engine, comprising:
an inlet line and an exhaust line to which lines an exhaust gas recirculation circuit is connected; a butterfly valve for regulating engine speed mounted in the inlet line downstream of the recirculation circuit; and a first flow regulating valve mounted in the recirculation circuit and a second flow regulating valve mounted in one of the lines, the butterfly valve and the second valve being connected to a control unit designed to operate the second valve to increase a difference in pressure between a pressure upstream and a pressure downstream of the first valve and the butterfly valve in order, at the engine, to compensate for this variation in pressure.