Method for estimation of the quantity of fresh air present in the intake and exhaust manifolds of an internal combustion engine with a recirculation circuit

摘要

Method for estimation of the quantity of fresh air (maira, mairs) present in the intake and exhaust manifolds (3, 5) of an internal combustion engine (1) with a recirculation circuit (9, 10), by an observer (O), applied to a system (S) of the third order, which models the physical system constituted by the intake and exhaust manifolds (3, 5); the system (S) is obtained from differential equations, which regulate the processes of mixing of the gases, and from an equation which represents the behaviour of a lambda sensor (13). <IMAGE>