The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 1986
Filed:
Feb. 13, 1985
Alan P Ogburn, Cirencester, GB;
Ian J Harvey, Cricklade, GB;
Lucas Industries Public Limited Company, Birmingham, GB;
Abstract
An electronic control system for a solenoid based actuator for a fuel system of an engine includes a switchable transistor connected in a series circuit with a current sensing resistor and the solenoid of the actuator. A power circuit supplies switching pulses to the transistor through an AND gate. A control circuit supplies a control signal to the power circuit and also a trigger signal to a monostable circuit. The monostable circuit supplies an enable signal to the AND gate. The control circuit receives a feedback signal from the sensing resistor and as long as this lies within prescribed limits the control circuit will supply the control signal and the trigger signal. If the feedback signal lies outside the prescribed limits at least the trigger signal will be halted so that after the time period of the monostable circuit has lapsed the transistor will receive no further switching pulses. A fuse is connected in series with the solenoid which will blow in the event that the solenoid remains energized for longer than a prescribed time.