Automotive compressor: effect of an electric throttle in the upstream circuit on the surge limit

Pierre Podevin (1) , Amélie Danlos (1) , Michaël Deligant (2) , Plamen Punov (3) , Adrian Clenci (1, 4) , Guillaume de La Bourdonnaye (5)

1 CMGPCE - Laboratoire de Chimie moléculaire, génie des procédés chimiques et énergétiques
2 DynFluid - Laboratoire de Dynamique des Fluides
3 TU-Sofia - Technical University of Sofia [Bulgaria]
4 UPIT - Universitatea din Pitesti [Roumanie]
5 VALEO PES Company - Valeo Equipements Electriques Moteur

On vehicles equipped with a turbocharged engine, there is a risk of compressor surge. This surge generates instabilities that lead to driving inconvenience, or even mechanical failure of the supercharging system. In general, the surge appears rather in transient operation: sudden closing of the throttle valve on gasoline engine, regulation of the EGR on diesel engine linked also to turbine regulation (VNT device or Waste Gate). On a turbocharger test stand, we set up the surge line in a “conventional way”: stationary experiments. Then we set up this line in transient conditions for different positions of an electric throttle placed upstream the compressor. It appears that: the surge limit is pushing back to lower flow rates when it is determined in transient; the surge limit is pushing back to lower flow rates when closing the throttle valve. The tests were carried on by the transient analysis of the surge during a quick closing-opening of the electric throttle valve.

Domaines: Sciences de l'ingénieur [physics]

Pierre Podevin, Amélie Danlos, Michaël Deligant, Plamen Punov, Adrian Clenci, et al.. Automotive compressor: effect of an electric throttle in the upstream circuit on the surge limit. BulTrans-2018. 10th International Scientific Conference on Aeronautics, Automotive and Railway Engineering and Technologies, Sep 2018, Sozopol, Bulgaria. ⟨10.1051/matecconf/201823403006⟩. ⟨hal-01951210⟩