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1. (WO2018178536) METHOD FOR CONTROLLING A SUPERCHARGED SPARK-IGNITION ENGINE WITH PARTIAL RECIRCULATION OF EXHAUST GASES AND ASSOCIATED MOTORISATION MEANS

Pub. No.:    WO/2018/178536    International Application No.:    PCT/FR2018/050620
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 16 00:59:59 CET 2018
IPC: F02D 41/00
F02D 41/12
Applicants: RENAULT S.A.S
Inventors: PEREIRA, Luc
BESANCON, Thomas
Title: METHOD FOR CONTROLLING A SUPERCHARGED SPARK-IGNITION ENGINE WITH PARTIAL RECIRCULATION OF EXHAUST GASES AND ASSOCIATED MOTORISATION MEANS
Abstract:
The invention relates to a method for controlling a supercharged spark-ignition engine associated with a circuit for partial recirculation of exhaust gases to the intake, the engine being mounted on a motor vehicle. The main feature of this method is that, on raising the foot, first the EGR circuit valve closes without changing the position of the throttle valve housing of the engine or opening it further, and the injection of fuel into at least one cylinder of the engine is cut. The throttle valve housing is then almost completely closed after a predetermined period following the closure of the EGR valve, this period corresponding to the transfer time of recycled gases between the EGR valve and the engine.The injection of fuel is cut on the cylinders which, where appropriate, have not been cut before closing of the throttle valve housing. The use of the method is particularly advantageous in the case where the EGR circuit is of the low-pressure type.