摘要:
Method for estimation of the quantity of fresh air (m aira , m airs ) 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).
摘要:
A method for determining the actual offset value of an injector (5) of an internal combustion engine (1); the method includes the steps of: determining, at a stationary rate, a target injection time (T inj ) for the injector (5); driving the injector (5) to perform a single injection having a duration equal to the target injection time (T inj ); subsequently driving the injector (5) to perform n subsequent sub-injections, each having a duration equal to one n-th of the target injection (T inj ); measuring the exhaust gas titre (λ 1 ) by performing the single injection; measuring the exhaust gas titre (λ 2 ) by performing the n sub-injections; and determining the actual offset value (T offset ) of the injector (5) according to the variation of the exhaust gas titre by performing the single injection and by performing the n sub-injections.