Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-08-22
1989-09-05
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
361155, F02M 5100
Patent
active
048628662
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.
REFERENCES:
patent: 3665901 (1972-05-01), Monpetit et al.
patent: 3942485 (1976-03-01), Suda et al.
patent: 4589401 (1986-05-01), Karion et al.
patent: 4607311 (1986-08-01), Brown et al.
patent: 4639822 (1987-01-01), Kubach et al.
patent: 4665459 (1987-05-01), Byrun et al.
patent: 4706619 (1987-11-01), Bachl
patent: 4753207 (1988-06-01), Wright
Marelli Autronica S.p.A.
Nelli Raymond A.
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