Agradecimentos: Research supported in part by the Spanish Ministry of Economy and Competitiveness through the research projects [grant number DPI2015-64170-R/MINECO/FEDER, DPI2011-25822,DPI2015-64170-R/MINECO/FEDER]; by the Government of Catalonia (Spain) through [grant number 2014SGR859]; and by the Brazilian agencies FAPESP Grants [grant number 03/06736-7]; CNPq Grant [grant number 304856/2007-0]; and CAPES Grant Programa PVE [grant number 88881.030423/2013-01] Ver menos

The paper presents conditions to assure stochastic stability for a nonlinear model. The proposed model is used to represent the input-output dynamics of the angle of aperture of the throttle valve (input) and the manifold absolute pressure (output) in an automotive spark-ignition engine. The automotive model is second moment stable, as stated by the theoretical result-data collected from real-time experiments supports this finding Ver menos