Low power acoustic injector drive circuit with enhanced turn on
An acoustic fuel injector system comprises a DC-to-DC converter for supplying a regulated voltage to a frequency controlled oscillator which drives the injector valve or valves. The converter comprises a flyback oscillator including a switching transistor and a transformer for applying rectified current pulses of variable amplitude and occurrence rate to an output capacitor. A variable impedance device in the input circuit to the flyback oscillator is controlled by a feedback signal from the output circuit to vary the cycle rate of the flyback oscillator to maintain output voltage at a desired value. The feedback signal is coupled to the oscillator control circuit input to effect a variable regulated output voltage which is relatively high upon injector turn-on but decays to a lower operating level thereafter.
- Assignee:
- Eaton Corporation
- Patent Number(s):
- US 4537353
- OSTI ID:
- 5833334
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330603* -- Vehicle Design Factors-- Engine System
ACOUSTICS
CONTROL
CONTROL EQUIPMENT
DC TO DC CONVERTERS
DESIGN
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FEEDBACK
FLOW REGULATORS
FREQUENCY CONTROL
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
OPERATION
OSCILLATORS
SEMICONDUCTOR DEVICES
START-UP
SWITCHING CIRCUITS
TRANSFORMERS
TRANSISTOR OSCILLATORS
TRANSISTORS
VALVES
VOLTAGE REGULATORS