Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1984-04-24
1986-03-18
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123478, 363 15, F02D 4120
Patent
active
045761353
ABSTRACT:
Fuel injection apparatus including a power converter for generating a stable, high voltage DC signal for powering the fuel injectors. The power converter is connected to a voltage source such as a vehicle battery. The power converter includes a DC-DC converter and a feedback-stabilized converter control circuit. The converter control circuit adjusts the operation of the DC-DC converter in a direction to counteract changes in output voltage caused by battery voltage variations. The high voltage DC signal is applied to each injector through one or more solid state switches. Since the signal used to power the fuel injectors is substantially constant regardless of normal battery voltage variations, the injector pull-in time is substantially constant. Moreover, the use of a high voltage power signal enables low current injectors to be used. The low injector current results in low power dissipation by the solid state switches which operate the injectors. The output voltage generated by the converter is also used to bootstrap the power signal applied to the converter control circuit.
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Data Sheet for TL 494 Integrated Circuit.
Data Sheet for L5832 Integrated Circuit.
Dolinar Andrew M.
TRW Inc.
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