Circuit for the piloting of inductive loads, particularly for operating the electro-injectors of a diesel-cycle internal combustion engine

Abstract

A piloting circuit for inductive loads, particularly for operating the electro-injectors of a diesel engine, comprises an input for connection to a low tension supply, a storage coil for storing energy delivered by the supply, and electronic switching devices for controlling the connection between the input, the storage coil and each of the loads in a predetermined manner to achieve a rapid transfer of current each of the loads selectively a capacitor situated in parallel with the branch circuits containing the loads and connected to the coil and the electronic switching devices, and an electronic control unit. The electronic control unit pilots the electronic switching devices according to a first operative mode in which, to transfer current to one of the loads, the switching devices cause in succession, after the connection the storage coil to the supply, the connection of the storage coil to the capacitor so as to form a resonant circuit, and then the discharge of the resonant circuit into the load.

Dependencies are inferred from the claim text.