Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1979-08-17
1981-11-17
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Fuel injection system
361154, F02D 500, H01F 718
Patent
active
043005080
ABSTRACT:
An installation for the operation of electromagnetic loads, especially solenoid valves, in fuel supply systems in internal combustion engines, wherein a measuring resistor as well as a switch are connected in series with the load and the entire arrangement is connected to the two supply voltage terminals. The installation comprises two comparators connected in parallel with the measuring resistor, at least one resistor being connected in front of these comparators, and controllable current source arranged between the junction of the threshold switch and the resistor in the proximity of the load, as well as a supply voltage terminal. The supply voltage of one of the comparators is made dependent on the voltage in the freewheel circuit, to maintain at least one of the comparators in the operating position even during freewheeling operation.
REFERENCES:
patent: 4092717 (1978-05-01), DiNunzio
patent: 4167030 (1979-09-01), Heidt
patent: 4173031 (1979-10-01), Leichle
patent: 4176337 (1979-11-01), Harper
patent: 4180026 (1979-12-01), Schulzke et al.
Buxmeyer Walter
Harsch Klaus
Schulzke Peter
Streit Klaus
Dolinar Andrew M.
Greigg Edwin E.
Myhre Charles J.
Robert & Bosch GmbH
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