Position sensor for a fuel injection element in an internal combustion engine

Patent · Tue Aug 18 04:00:00 EDT 1987

OSTI ID:5988145

Fulkerson, D E; Geske, M L

This patent describes an electronic circuit for dynamically sensing and processing signals representative of changes in a magnet field, the circuit comprising: means for sensing a change in a magnetic field external to the circuit and providing an output representative of the change; circuit means electronically coupled with the output of the sensing means for providing an output indicating the presence of the magnetic field change; and a nulling circuit coupled with the output of the sensing means and across the indicating circuit means for nulling the electronic circuit responsive to the sensing means output, to thereby avoid ambient magnetic fields temperature and process variations, and wherein the nulling circuit comprises a capacitor coupled to the output of the nulling circuit, means for charging and discharging the capacitor responsive to any imbalance in the input to the nulling circuit, and circuit means coupling the capacitor with the output of the sensing means for nulling any imbalance during the charging or discharging of the capacitor.

• Assignee: George D. Wolff, Winter Haven, FL
• Patent Number(s): US 4687994
• OSTI ID: 5988145
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CAPACITORS
CONTROL SYSTEMS
DATA PROCESSING
DISPLACEMENT GAGES
ELECTRIC CHARGES
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MAGNETIC FIELDS
MEASURING INSTRUMENTS
PROCESSING
SIGNALS
TEMPERATURE EFFECTS