초록 ▼

Electronic system for calculating injection time in which an electronic unit with microprocessor receives as input a multiplicity of signals measured in the engine and a signal proportional to the engine load, for example a signal generated by a pressure sensor arranged in the intake manifold of the

Electronic system for calculating injection time in which an electronic unit with microprocessor receives as input a multiplicity of signals measured in the engine and a signal proportional to the engine load, for example a signal generated by a pressure sensor arranged in the intake manifold of the engine. The electronic unit comprises a circuit for compensating for the delay times due to the response inertia of the engine load sensor, the conditioning (filtering, conversion and processing) of the load signal and physical actuation of the injection. The electronic unit also comprises a circuit for the dynamic compensation of the “film/fluid”effect.

대표청구항 ▼

Electronic system for calculating injection time comprising: an electronic unit (7) receiving as input a multiplicity of data signals (N, TH20, Pfarf, Taria) measured in an endothermic engine (4); said electronic unit (7) receiving as input an engine load signal which is a measure of the engine load

Electronic system for calculating injection time comprising: an electronic unit (7) receiving as input a multiplicity of data signals (N, TH20, Pfarf, Taria) measured in an endothermic engine (4); said electronic unit (7) receiving as input an engine load signal which is a measure of the engine load (P) generated by an engine load sensor (36); said electronic unit (7) being capable of generating an injection time (Tjeff) for a multiplicity of injectors (40); said electronic unit (7) comprising reconstructive means (47) receiving as input said engine load signal (P) together with at least some (N, TH20) of said data signals; said reconstructive means (47) being capable of generating as output a correct engine load signal (Pric) which is a measure of the correct engine load which compensates for the response delays of said engine load sensor (36), the system processing delays and the delays due to the actuation of the injection; said reconstructive means (47) being capable of supplying said correct engine load signal (Pric) to electronic calculation means (51) generating as output an intermediate injection time (Tjin); said electronic unit (7) also comprising electronic means of compensation for dynamic film/fluid variation (57) receiving as input said intermediate injection time (Tjin) and generating as output a correct injection time (Tjcorr); said electronic means of compensation for dynamic film/fluid variation (57) comprising means (80, 84, 87, 85, 93) capable of compensating for the variation in the mixture supplied to a combustion chamber (42) due to the dynamic variation of a layer of fuel deposited on the walls of an intake manifold.